CN108847078B

CN108847078B - Dress table meets electric training system

Info

Publication number: CN108847078B
Application number: CN201810584773.7A
Authority: CN
Inventors: 青志明; 张红兵; 周飞; 李奇志; 黄峰; 胡继刚; 何蓓; 傅望; 谢焰; 苟欣; 刘克恒; 陈渝; 张发标; 周浩
Original assignee: Chongqing Caipeng Electric Appliance Whole Set Equipment Co ltd; State Grid Chongqing Electric Power Co Skill Training Center; State Grid Corp of China SGCC
Current assignee: Chongqing Caipeng Electric Appliance Whole Set Equipment Co ltd; State Grid Chongqing Electric Power Co Skill Training Center; State Grid Corp of China SGCC
Priority date: 2018-06-08
Filing date: 2018-06-08
Publication date: 2024-06-14
Anticipated expiration: 2038-06-08
Also published as: CN108847078A

Abstract

The invention relates to a meter-mounting electricity-connecting training system, which comprises a computer, a high-voltage meter-mounting electricity-connecting practical training cabinet and a low-voltage meter-mounting electricity-connecting practical training cabinet, wherein the high-voltage meter-mounting electricity-connecting practical training cabinet has the functions of wiring process training, wiring correct and incorrect detection training and fault simulation training; the low-voltage meter-mounting electricity-connection practical training cabinet has the functions of wiring process training, instrument measurement training and fault simulation training; the intelligent wiring and intelligent process identification and evaluation device can be used for training completely according to a standardized operation flow, has control and evaluation functions, can realize wiring correct and error and intelligent process identification and evaluation, is high in training efficiency, and greatly improves the fairness and fairness of evaluation.

Description

Dress table meets electric training system

Technical Field

The invention relates to a system for training in the power industry, in particular to a meter-loading power-on training system.

Background

The existing meter-loading electricity-receiving training system facilities are old, and training subjects are not uniform in category. The meter-mounting and power-on training system mainly has the following problems: the training function is imperfect.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a meter-mounting electricity-receiving training system which can carry out meter-mounting electricity-receiving installation practical training and has various fault simulations.

The technical scheme of the invention is as follows: the meter-mounting electricity-connecting training system comprises a high-voltage meter-mounting electricity-connecting practical training cabinet and a low-voltage meter-mounting electricity-connecting practical training cabinet, wherein a high-voltage analog current transformer, a high-voltage analog voltage transformer, a high-voltage electric energy meter and an analog junction box for a student to conduct high-voltage meter-mounting electricity-connecting practical training and fault maintenance practical training are arranged in the high-voltage meter-mounting electricity-connecting practical training cabinet, and a power supply for providing working voltage and working current; the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box are respectively and electrically connected with the high-voltage fault setting controller, and the high-voltage fault setting controller is connected with the computer and is used for receiving instruction signals of the computer and respectively outputting control signals to the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to control the high-voltage analog current transformer to perform secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; the high-voltage analog voltage transformer is controlled to perform phase sequence transformation fault simulation setting, single-phase on-off fault simulation setting and open-phase fault simulation setting; the simulation junction box is controlled to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and the simulation junction box is used for observing, analyzing and training various fault generation phenomena and results of high-voltage meter power connection;

The low-voltage installation meter power-on practical training cabinet is internally provided with a low-voltage analog current transformer, a low-voltage energy meter and an analog junction box which are used for a student to conduct low-voltage installation practical training and fault maintenance practical training, and a power supply used for providing working voltage and working current, wherein the low-voltage analog current transformer and the analog junction box are respectively and electrically connected with a low-voltage fault setting controller, the low-voltage fault setting controller is connected with a computer and used for receiving instruction signals of the computer, respectively outputting control signals to the low-voltage analog current transformer and the analog junction box, and controlling the low-voltage analog current transformer in the low-voltage installation meter power-on practical training cabinet to conduct secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; and controlling the simulation junction box to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and being used for observing, analyzing and training various fault generation phenomena and results of low-voltage meter power connection.

The high-voltage meter-mounting electricity-connecting practical training cabinet or/and the low-voltage meter-mounting electricity-connecting practical training cabinet are internally provided with a process camera device, and the process camera device is used for shooting the meter-mounting electricity-connecting wiring of a student according to a command signal, transmitting the shot picture to a computer, and receiving the picture transmitted by the process camera device by the computer for storage and display; the process camera device is in communication connection with the computer through the wireless data receiving terminal.

The high-voltage meter connection practical training cabinet or/and the low-voltage meter connection practical training cabinet further comprises an electric energy metering device connection error identification device for connection error detection training, wherein the electric energy metering device connection error identification device has an intelligent detection function, can automatically detect and judge errors or faults of a voltage loop and a current loop of an installation connection, and gives out fault indication (sound and light alarm); when the current and voltage loops have faults, the loop with the faults sends out fault indication, and the rest current and voltage loops without faults can normally operate; the wiring correct and error recognition device of the electric energy metering device is used for transmitting detected wiring correct and error data to the computer; the wiring positive and negative identification device of the electric energy metering device is in communication connection with the computer through a 485 data receiving terminal.

The high-voltage fault setting controller comprises a switching power supply and a PLC controller or a singlechip, wherein the switching power supply is used for supplying power to the PLC controller, the output end of the PLC controller is connected with a plurality of intermediate relays for controlling the electrifying or the outage of the intermediate relays, and each intermediate relay is used for correspondingly controlling the electrifying or the outage of a high-voltage analog current transformer, a high-voltage analog voltage transformer and a contactor or a relay in an analog junction box respectively and controlling the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to carry out high-voltage fault setting respectively; the low-voltage fault setting controller comprises a switching power supply and a PLC controller or a singlechip, wherein the switching power supply is used for supplying power to the PLC controller, the output end of the PLC controller is connected with a plurality of intermediate relays for controlling the power-on or power-off of the intermediate relays, and each intermediate relay is used for correspondingly controlling the power-on or power-off of a low-voltage analog current transformer and a contactor or a relay in an analog junction box respectively and controlling the low-voltage analog current transformer and the analog junction box to set the low-voltage fault respectively; the high-voltage fault setting controller and the low-voltage fault setting controller are in communication connection with the computer through a 485 data receiving terminal;

The primary side of the high-voltage analog current transformer in the high-voltage meter connection practical training cabinet is connected with the current output end of the power supply, the secondary side of the high-voltage analog current transformer is connected with the current input end of the high-voltage electric energy meter through an analog junction box, the primary side of the high-voltage analog voltage transformer is connected with the voltage output end of the power supply, and the secondary side of the high-voltage analog voltage transformer is connected with the voltage input end of the high-voltage electric energy meter through an analog junction box; the primary side of the low-voltage analog current transformer in the low-voltage meter connection practical training cabinet is connected with the current output end of the power supply, the secondary side of the low-voltage analog current transformer is connected with the current input end of the low-voltage energy meter through an analog junction box, and the voltage input end of the low-voltage energy meter is connected with the voltage output end of the power supply through an analog junction box.

The fault setting controller of the invention can adopt a PLC controller or can also adopt a singlechip.

The high-voltage analog current transformer comprises a high-voltage current transformer shell for a student to carry out high-voltage meter connection and installation practical training and a high-voltage current transformer analog circuit for the student to carry out fault maintenance practical training, wherein the high-voltage current transformer analog circuit comprises a plurality of relays and one or more current transformers Ta, when the number of the current transformers Ta is multiple, primary sides P1 and P2 of the current transformers Ta are connected in series between a current input terminal P1 and a current input terminal P2, secondary sides S1 and S2 of each current transformer Ta are respectively connected with current output terminals S1 and S2 through a transformation ratio switching relay, each transformation ratio switching relay is used for correspondingly controlling the on-off of a circuit between the secondary sides S1 and S2 of each current transformer Ta and the current output terminals S1 and the secondary sides S2 of the current transformers corresponding to the transformation ratio switching relay J36, and other transformation ratio switching relays other than the secondary sides of the secondary sides S1 and the secondary sides of the current transformers Ta are in short circuit with the transformation ratio switching relay J36 being made by other than the transformation ratio switching relay J36, and the secondary sides of the current transformers corresponding to the secondary sides of the secondary transformers corresponding to the secondary sides of the current transformers S2 are not in short circuit;

When the current transformer Ta is one, the primary side P1 of the current transformer Ta is connected with the current input terminal P1, the primary side P2 of the current transformer Ta is connected with the current input terminal P2, and the secondary sides S1 and S2 of the current transformer Ta are respectively connected with the current output terminals S1 and S2;

a relay J3 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S1 of the current transformer Ta and the current output terminal S1, and a relay J4 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S2 of the current transformer Ta and the current output terminal S2; a relay J1 and a relay J2 for controlling the forward and reverse of the secondary polarity are arranged on a circuit between the secondary sides S1 and S2 of the current transformer Ta and the current output terminals S1 and S2; one end of a first contact of the relay J1 is used for being connected with a secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with a current output terminal S1, one end of a second contact of the relay J1 is used for being connected with a secondary side S2 of the current transformer Ta, the other end of the second contact of the relay J1 is used for being connected with the current output terminal S2, one end of the first contact of the relay J2 is used for being connected with the secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with the current output terminal S2, and one end of the second contact of the relay J2 is used for being connected with the secondary side S2 of the current transformer Ta; each relay is connected with a high-voltage fault setting controller, and the high-voltage fault setting controller is used for controlling the power-on or power-off of each relay and controlling the closing or opening of the contact of the relay; the current input terminals P1 and P2 are used for being respectively connected with a primary side wiring terminal on the high-voltage current transformer shell or a current output end of a power supply, and the current output terminals S1 and S2 are used for being respectively connected with a secondary side wiring terminal on the high-voltage current transformer shell or a current input end of an analog wiring box or a high-voltage energy meter; the high-voltage transformer shell, the simulation junction box and the high-voltage energy meter are respectively installed on an operation surface arranged in a cabinet body of the high-voltage meter power-on practical training cabinet, so that students can carry out high-voltage meter power-on process installation training. The current transformer Ta is a common current transformer. The high-voltage current transformer analog circuit can be arranged in the high-voltage current transformer shell and can also be arranged outside the high-voltage current transformer shell.

The low-voltage analog current transformer comprises a low-voltage current transformer shell for a student to carry out low-voltage meter connection and installation practical training and a low-voltage current transformer analog circuit for the student to carry out fault maintenance practical training, wherein the low-voltage current transformer analog circuit comprises a plurality of relays and one or more current transformers Ta, when the number of the current transformers Ta is multiple, primary sides P1 and P2 of the current transformers Ta are connected in series between a current input terminal P1 and a current input terminal P2, secondary sides S1 and S2 of each current transformer Ta are respectively connected with current output terminals S1 and S2 through a transformation ratio switching relay, each transformation ratio switching relay is used for correspondingly controlling the on-off of a circuit between the secondary sides S1 and S2 of each current transformer Ta and the current output terminals S1 and S2, and when the secondary sides S1 and the secondary sides S2 of the current transformers Ta corresponding to the transformation ratio switching relay J34 are in short circuit, the secondary sides of the current transformers Ta are in short circuit with other than the transformation ratio switching relay J34 through other transformation ratio switching relays other than the secondary sides of the transformation ratio switching relay J34, and the secondary sides of the current transformers which correspond to the secondary sides of the transformation ratio switching relay J34 are not in short circuit;

A relay J3 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S1 of the current transformer Ta and the current output terminal S1, and a relay J4 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S2 of the current transformer Ta and the current output terminal S2; a relay J1 and a relay J2 for controlling the forward and reverse of the secondary polarity are arranged on a circuit between the secondary sides S1 and S2 of the current transformer Ta and the current output terminals S1 and S2; one end of a first contact of the relay J1 is used for being connected with a secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with a current output terminal S1, one end of a second contact of the relay J1 is used for being connected with a secondary side S2 of the current transformer Ta, the other end of the second contact of the relay J1 is used for being connected with the current output terminal S2, one end of the first contact of the relay J2 is used for being connected with the secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with the current output terminal S2, and one end of the second contact of the relay J2 is used for being connected with the secondary side S2 of the current transformer Ta; each relay is connected with a low-voltage fault setting controller, and the low-voltage fault setting controller is used for controlling the power-on or power-off of each relay and controlling the closing or opening of the contact of the relay; the current input terminals P1 and P2 are used for being connected with a current output end of a power supply or a primary side terminal on the shell of the low-voltage transformer respectively, and the current output terminals S1 and S2 are used for being connected with a secondary side terminal on the shell of the low-voltage transformer or a current input end of an analog junction box or a low-voltage energy meter respectively; the low-voltage power transformer shell, the simulation junction box and the low-voltage power meter are respectively arranged on an operation surface arranged in a cabinet body of the low-voltage meter connection practical training cabinet, so that students can carry out low-voltage meter connection technical installation training; and a primary-side wiring terminal arranged on the shell of the low-voltage transformer is connected with a bus bar arranged at the voltage output end of the power supply. In this embodiment, a primary-side connection terminal P1 disposed on the low-voltage current transformer housing is connected with a busbar disposed at a voltage output end of a power supply, and a primary-side connection terminal P2 disposed on the low-voltage current transformer housing is used for being connected with an outlet end of a low-voltage meter-mounted power practical training cabinet. The primary side wiring terminal P1 and the primary side wiring terminal P2 which are arranged on the shell of the low-voltage current transformer are in short circuit. The analog circuit of the low-voltage current transformer is arranged outside the shell of the low-voltage current transformer. The current transformer Ta is a common current transformer.

The analog voltage transformer comprises two high-voltage transformer shells for a student to carry out high-voltage meter installation practical training and a high-voltage transformer analog circuit for the student to carry out fault maintenance practical training, the high-voltage transformer analog circuit comprises a three-phase transformer and a plurality of control switches, a primary side A of the three-phase transformer is connected with a voltage wiring terminal A through a first control switch, a primary side B of the three-phase transformer is respectively connected with the voltage wiring terminal B through a second control switch, and a primary side C of the three-phase transformer is connected with the voltage wiring terminal C through a third control switch; the secondary side a of the three-phase transformer is connected with voltage wiring terminals a, b and c through a fourth control switch, a fifth control switch and a sixth control switch respectively, the secondary side b of the three-phase transformer is connected with voltage wiring terminals a, b and c through a seventh control switch, an eighth control switch and a ninth control switch respectively, and the secondary side c of the three-phase transformer is connected with voltage wiring terminals a, b and c through a tenth control switch, an eleventh control switch and a twelfth control switch respectively;

The first control switch, the second control switch, the third control switch, the fourth control switch, the fifth control switch, the sixth control switch, the seventh control switch, the eighth control switch, the ninth control switch, the tenth control switch, the eleventh control switch and the twelfth control switch are connected with a high-voltage fault setting controller, and the high-voltage fault setting controller is used for controlling the on or off of each control switch; each control switch adopts a contactor or a relay respectively;

The primary side wiring terminal A on the first high-voltage transformer shell is connected with the voltage wiring terminal A, the primary side wiring terminal B on the first high-voltage transformer shell and the primary side wiring terminal A on the second high-voltage transformer shell are connected with the voltage wiring terminal B, the primary side wiring terminal B on the second high-voltage transformer shell is used for being connected with the voltage wiring terminal C, the secondary side wiring terminal a on the first high-voltage transformer shell is connected with the voltage wiring terminal a, the secondary side wiring terminal B on the first high-voltage transformer shell and the secondary side wiring terminal a on the second high-voltage transformer shell are connected with the voltage wiring terminal B, and the secondary side wiring terminal B on the second high-voltage transformer shell is used for being connected with the voltage wiring terminal C;

The primary side binding post A on the first high-voltage potential transformer shell is used for being connected with the U-phase voltage output end of a power supply, the primary side binding post B on the first high-voltage potential transformer shell and the primary side binding post A on the second high-voltage potential transformer shell are both connected with the V-phase voltage output end of the power supply, the primary side binding post B on the second high-voltage potential transformer shell is used for being connected with the W-phase voltage output end of the power supply, the secondary side binding post a on the first high-voltage potential transformer shell is used for being connected with the voltage inlet wire terminal a of an analog junction box or the U-phase voltage input end of a high-voltage energy meter, the secondary side binding post B on the first high-voltage potential transformer shell and the secondary side binding post a on the second high-voltage potential transformer shell are both used for being connected with the voltage inlet wire terminal B of the analog junction box or the V-phase voltage input end of the high-voltage energy meter, and the secondary side binding post B on the second high-voltage potential transformer shell is used for being connected with the voltage inlet wire terminal c of the analog junction box or the W-phase voltage input end of the high-voltage meter.

When the power supply can only output 380V voltage, the three-phase transformer is needed to be arranged on the analog voltage transformer for changing the 380V power supply into 100V voltage, and the structure is adopted because the voltage input end of the high-voltage meter is 100V. When the power supply can only output 100V voltage, the analog voltage transformer does not need to be provided with a three-phase transformer, and the structure is adopted as follows.

The analog voltage transformer comprises two high-voltage transformer shells for a student to carry out high-voltage meter installation practical training and a high-voltage transformer analog circuit for the student to carry out fault maintenance practical training, wherein the high-voltage transformer analog circuit comprises a plurality of control switches, one ends of a fourth control switch, a fifth control switch and a sixth control switch are connected with a voltage wiring terminal A, the other ends of the fourth control switch, the fifth control switch and the sixth control switch are respectively connected with voltage wiring terminals a, B and C, one ends of a seventh control switch, an eighth control switch and a ninth control switch are respectively connected with a voltage wiring terminal B, the other ends of the seventh control switch, the eighth control switch and the ninth control switch are respectively connected with voltage wiring terminals a, B and C, one ends of the tenth control switch, the eleventh control switch and the twelfth control switch are respectively connected with a voltage wiring terminal C, and the other ends of the tenth control switch, the eleventh control switch and the twelfth control switch are respectively connected with voltage wiring terminals a, B and C; the first control switch is connected in series between the voltage wiring terminal A and the voltage wiring terminal a, the second control switch is connected in series between the voltage wiring terminal B and the voltage wiring terminal B, and the third control switch is connected in series between the voltage wiring terminal C and the voltage wiring terminal C;

Two parallel circuits which are respectively controlled to be on-off by a first control switch and a second control switch are respectively arranged between each wire inlet end and the corresponding wire outlet end of the simulation junction box, a resistor is connected in series on one circuit, the first control switch and the second control switch are connected with a corresponding fault setting controller, and the fault setting controller is used for controlling the on-off of the first control switch and the second control switch; the first control switch and the second control switch adopt contactors or relays, the first control switch and the second control switch are normally open contacts and normally closed contacts of the contactors or relays respectively, and a resistor is connected in series on a circuit provided with the normally open contacts.

The meter-mounting electricity-connection training system further comprises a plurality of double-authorization control cabinets, wherein the outlet end of each double-authorization control cabinet is respectively connected with a power supply inlet wire terminal of the high-voltage meter-mounting electricity-connection practical training cabinet or the low-voltage meter-mounting electricity-connection practical training cabinet, and each double-authorization control cabinet is configured for each high-voltage meter-mounting electricity-connection practical training cabinet and each low-voltage meter-mounting electricity-connection practical training cabinet; the double-authorization control cabinet is provided with a power converter, a control module, a request input device, a prompt device, a power input interface used for being connected with a power supply and a power output interface used for being connected with a wire inlet end of a high-voltage power simulation device, a first power control switch and a second power control switch are connected in series on a simulation power transmission line between the power input interface and the power output interface, and the first power control switch is positioned between the power input interface and the second power control switch; the power converter is used for providing power for the control module; the request input device is used for collecting power-on requests and power-off requests of operators and transmitting the power-on requests and the power-off requests to the control module; the control module is used for respectively sending a power-on request signal and a power-off request signal to the first management platform and the second management platform, the first management platform is used for receiving the power-on request signal and the power-off request signal uploaded by the double-authorization management device, issuing an authorized power-on command and a power-off command to the control module of the double-authorization management device, and the control module is used for receiving the authorized power-on command and the power-off command issued by the first management platform, controlling the first power control switch to be closed and opened and reminding through the reminding device; the second management platform is used for receiving the power-on and power-off request signals uploaded by the double-authorization management device, issuing power-on and power-off authorization instructions to the control module of the double-authorization management device, and the control module is used for receiving the power-on and power-off authorization instructions issued by the second management platform, controlling the second power supply to control the switch to be turned on and off and reminding through the reminding device; the power supply has the functions of voltage, current and phase sequence adjustment; the power supply adopts the virtual power supply that has voltage output, current output and phase output function, virtual power supply's inlet wire terminal connects real standard cabinet of electric or low pressure dress table to connect the real power inlet wire terminal that the standard cabinet was equipped with of electric, power inlet wire terminal is used for being connected with the commercial power, be equipped with contactor KM1 between virtual power supply and the power inlet wire terminal for control virtual power and the break-make of the circuit between the power inlet wire terminal, contactor KM 1's coil and scram button JT, relay J33 establish ties in the power supply loop of contactor, and relay J33's coil is connected with the output of the fault setting controller that corresponds, and this fault setting controller is used for controlling relay J33 circular telegram or outage, control virtual power supply's start-stop. And a safety indicator lamp is connected on a line between the virtual power supply and the power supply incoming line terminal. The power supply adopts a virtual power supply, and can provide voltage and current with adjustable size for the electric energy meter. The double-authorization control cabinet can be arranged to greatly improve the safety of the system.

The meter-loading power-on training system further comprises a trainee practical training video tracking evaluation system, wherein the trainee practical training video tracking evaluation system comprises a station area video monitoring device, individual operation video monitoring devices and identification marks worn on operators, each individual operation video monitoring device is used for respectively shooting the field operation process of the corresponding operator in real time and transmitting the individual operation video data shot in real time to a video analysis processing workstation, and the video analysis processing workstation is used for receiving the individual operation video data, identifying the identity of the operator corresponding to the individual operation video data according to the unique mark corresponding to each individual operation video monitoring device and respectively storing the individual operation video data of each operator; the video monitoring device of each station area is used for shooting the corresponding practical training station area in real time, transmitting the station monitoring video data shot in real time to the video analysis processing workstation, wherein the video analysis processing workstation is used for receiving the station monitoring video data, completing the position positioning and the identity information identification of each operator according to the personnel identity identification mark information contained in each frame image of the station monitoring video data, comparing the position of each operator with the set movable range, analyzing whether each operator exceeds the allowed movable area, and prompting.

The high-voltage meter-connection practical training cabinet is internally provided with two analog current transformers, the primary side of a first analog current transformer in the high-voltage meter-connection practical training cabinet is connected with the U-phase current output end of a power supply, the secondary side of the first analog current transformer in the high-voltage meter-connection practical training cabinet is connected with the U-phase current input end of the high-voltage electric energy meter through an analog junction box, the primary side of a second analog current transformer in the high-voltage meter-connection practical training cabinet is connected with the W-phase current output end of the power supply, and the secondary side of the second analog current transformer in the high-voltage meter-connection practical training cabinet is connected with the W-phase current input end of the high-voltage electric energy meter through an analog junction box;

Three analog current transformers are arranged in the low-voltage meter connection practical training cabinet, the primary side of a first analog current transformer in the low-voltage meter connection practical training cabinet is connected with the U-phase current output end of a power supply, the secondary side of the first analog current transformer in the low-voltage meter connection practical training cabinet is connected with the U-phase current input end of a low-voltage energy meter through an analog junction box, the primary side of a second analog current transformer in the low-voltage meter connection practical training cabinet is connected with the V-phase current output end of the power supply, and the secondary side of the second analog current transformer in the low-voltage meter connection practical training cabinet is connected with the V-phase current input end of the low-voltage energy meter through an analog junction box; the primary side of a third analog current transformer in the low-voltage meter connection practical training cabinet is connected with the W-phase current output end of the power supply, and the secondary side of the third analog current transformer in the low-voltage meter connection practical training cabinet is connected with the W-phase current input end of the low-voltage energy meter through an analog junction box.

The beneficial effects of the invention are as follows: the system comprises a high-voltage meter connection practical training cabinet and a low-voltage meter connection practical training cabinet, wherein a high-voltage analog current transformer, a high-voltage analog voltage transformer, a high-voltage electric energy meter and an analog junction box for providing working voltage and working current for students to conduct high-voltage meter connection practical training and fault maintenance practical training are arranged in the high-voltage meter connection practical training cabinet; the low-voltage meter-connection practical training cabinet is internally provided with a low-voltage analog current transformer, a low-voltage electric energy meter and an analog junction box which are used for a student to conduct practical training of low-voltage meter-connection and practical training of fault maintenance, and a power supply used for providing working voltage and working current. The student can carry out the real standard of high pressure dress table power connection installation and the real standard of low pressure dress table power connection installation respectively on the real standard cabinet of high pressure dress table power connection and the real standard of low pressure dress table power connection.

The process camera device is arranged in the high-voltage meter connection practical training cabinet and is used for shooting the high-voltage meter connection electric wire of a student according to the instruction signal, transmitting the shot picture to the computer, and receiving the picture transmitted by the process camera device by the computer for storage and display; the teacher is instructed to compare the student operation results with the standard results and to evaluate the score. The scoring results can be recorded into the assessment system by a teacher and can be counted into the student's results.

The high-voltage meter connection practical training cabinet further comprises a wiring correct and incorrect identification device of the electric energy metering device for wiring correct and incorrect detection training, wherein the wiring correct and incorrect identification device of the electric energy metering device has an intelligent detection function, can automatically detect and judge errors or faults of a voltage loop and a current loop of an installation wiring, and gives out fault indication (sound and light alarm); when the current and voltage loops have faults, the loop with the faults sends out fault indication, and the rest current and voltage loops without faults can normally operate; the wiring correct and error recognition device of the electric energy metering device is used for transmitting detected wiring correct and error data to the computer; the wiring error identification device of the electric energy metering device is in communication connection with the computer through a 485 data receiving terminal; after the wiring of a student is finished, the wiring error of the student can be detected through the wiring error recognition device of the electric energy metering device, the wiring error recognition device of the electric energy metering device can automatically detect and judge errors or faults of a voltage loop and a current loop of the installation wiring, and a fault indication is sent, so that the student can know whether the wiring is correct or not, and the meter installation power connection debugging practical training is realized. And the wiring correct and error recognition device of the electric energy metering device can also transmit detected wiring correct and error data to a computer, and the computer stores and displays the wiring correct and error data of a student, so as to guide a teacher to judge and score according to the wiring correct and error data.

The high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box are respectively and electrically connected with the high-voltage fault setting controller, and the high-voltage fault setting controller is connected with the computer and is used for receiving instruction signals of the computer and respectively outputting control signals to the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to control the high-voltage analog current transformer to perform secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; the high-voltage analog voltage transformer is controlled to perform phase sequence transformation fault simulation setting, single-phase on-off fault simulation setting and open-phase fault simulation setting; the simulation junction box is controlled to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and the simulation junction box is used for observing, analyzing and training various fault generation phenomena and results of high-voltage meter power connection; the low-voltage analog current transformer and the analog junction box are respectively and electrically connected with the low-voltage fault setting controller, the low-voltage fault setting controller is connected with the computer and used for receiving instruction signals of the computer and respectively outputting control signals to the low-voltage analog current transformer and the analog junction box to control the low-voltage analog current transformer in the low-voltage meter connection practical training cabinet to carry out secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; and controlling the simulation junction box to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and being used for observing, analyzing and training various fault generation phenomena and results of low-voltage meter power connection. If the wiring is correct, a learner can request to power on the high-voltage meter-mounting power-on practical training cabinet and the low-voltage meter-mounting power-on practical training cabinet, the teacher can set various faults through a computer, the learner can carry out meter-mounting power-on maintenance, judge the fault type and correct, and the corrected meter-collected data is indicated to be successful if the abnormal meter-collected data is changed into normal.

The system has the functions of the meter-mounting electric installation training, the meter-mounting electric debugging training and the meter-mounting electric fault checking training, can complete training according to a standardized operation flow, can realize intelligent recognition and evaluation of the wire correction and the process, has high training efficiency, and greatly improves the fairness and the fairness of evaluation.

Drawings

FIG. 1 is a schematic connection diagram of a high-voltage meter connection practical training cabinet of the invention;

Fig. 2 is an enlarged view of the P portion of fig. 1;

FIG. 3 is a schematic diagram of a first embodiment of the high voltage transformer analog circuit of the present invention;

FIG. 4 is a schematic diagram of a second embodiment of the high voltage transformer analog circuit of the present invention;

FIG. 5 is a schematic diagram of connection of the low-voltage meter-mounted power-on training cabinet of the invention;

FIG. 6 is an enlarged view of the portion O of FIG. 5;

Fig. 7 is an enlarged view of the Q part of fig. 5;

FIG. 8 is a schematic diagram of a simulated junction box of the present invention;

FIG. 9 is a schematic diagram of a power inlet control of the high-voltage meter connection training cabinet and the low-voltage meter connection training cabinet of the invention;

FIG. 10 is a schematic control diagram of a PLC controller according to the present invention;

FIG. 11 is a schematic diagram of the appearance of an analog current transformer of the present invention;

FIG. 12 is a schematic diagram of an analog voltage transformer according to the present invention;

FIG. 13 is a schematic block diagram of a meter-on training system with wiring correction and process detection of the present invention;

FIG. 14 is a communication diagram of a meter-on power-on training installation section of the present invention;

FIG. 15 is a communication diagram of the meter-on power-on training debugging section of the present invention.

Detailed Description

Referring to fig. 1 to 15, a meter-mounting electricity-receiving training system comprises a computer, a high-voltage meter-mounting electricity-receiving practical training cabinet and a low-voltage meter-mounting electricity-receiving practical training cabinet. In this embodiment, 4 cabinets are set to correspond to one computer, and of course, the computers can be changed according to actual needs. The high-voltage meter connection practical training cabinet is internally provided with a high-voltage analog current transformer, a high-voltage analog voltage transformer, a high-voltage electric energy meter and an analog junction box which are used for a student to conduct high-voltage meter connection practical training and fault maintenance practical training, and a power supply used for providing working voltage and working current; the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box are respectively and electrically connected with the high-voltage fault setting controller, and the high-voltage fault setting controller is connected with the computer and is used for receiving instruction signals of the computer and respectively outputting control signals to the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to control the high-voltage analog current transformer to perform secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; the high-voltage analog voltage transformer is controlled to perform phase sequence transformation fault simulation setting, single-phase on-off fault simulation setting and open-phase fault simulation setting; the simulation junction box is controlled to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and the simulation junction box is used for observing, analyzing and training various fault generation phenomena and results of high-voltage meter power connection;

The primary side of the high-voltage analog current transformer in the high-voltage meter connection practical training cabinet is connected with the current output end of the power supply, the secondary side of the high-voltage analog current transformer in the high-voltage meter connection practical training cabinet is connected with the current input end of the high-voltage electric energy meter through an analog junction box, the primary side of the high-voltage analog voltage transformer in the high-voltage meter connection practical training cabinet is connected with the voltage output end of the power supply, the secondary side of the high-voltage analog voltage transformer in the high-voltage meter connection practical training cabinet is connected with the voltage input end of the high-voltage electric energy meter through an analog junction box, the primary side of the low-voltage analog current transformer in the low-voltage meter connection practical training cabinet is connected with the current output end of the power supply, and the secondary side of the low-voltage analog current transformer in the low-voltage meter connection practical training cabinet is connected with the current input end of the low-voltage electric energy meter through an analog junction box.

The high-voltage meter connection training cabinet or/and the low-voltage meter connection training cabinet are internally provided with a process camera device which is used for shooting the high-voltage meter connection wiring of a student according to a command signal and transmitting the shot picture to a computer in a wired or wireless mode. The process camera device comprises a singlechip, a power supply, a camera and a wireless communication module, wherein the power supply is used for supplying power to the process camera device, the singlechip is communicated with a computer through the wireless communication module such as a WiFi module, and the singlechip is used for controlling the camera to shoot pictures according to instruction signals issued by the computer or operation signals of a camera control switch and transmitting the shot pictures to the computer in a wired or wireless mode. According to the embodiment, when a student requests to be electrified, the singlechip controls the camera to shoot pictures.

In the embodiment, 3 cameras are installed in a high-voltage meter connection practical training cabinet. The 3 cameras are respectively used for shooting the front view surface, the left side surface and the right side surface of the high-voltage meter connection wire of the high-voltage meter connection practical training cabinet. The camera can move up and down along the track arranged in the high-voltage meter connection practical training cabinet according to the requirement.

The teacher compares the front view face, the left side face and the right side face of the picture shot by the camera with the standard pictures of the normal view angle, the left view angle and the right view angle which are recorded in advance, judges whether the wiring is reasonable, neat, attractive and clear, whether a number plate exists at the connecting position of the lead and the end button, and whether the color of the lead is distinguished according to standard requirements.

The appearance requirements of the high-voltage analog current transformer, the high-voltage analog voltage transformer, the analog junction box and the high-voltage electric energy meter are consistent with those of the field arrangement. The virtual power supply of this patent is the same as in application nos. 201510258914.2, 201510259148.1. The high voltage electric energy meter is consistent with a standard three-phase four-wire meter, and the installation size requirement is consistent with field arrangement. Each performance index is consistent with a standard three-phase four-wire meter and a corresponding mounting bracket should be configured. The appearance requirement of the low-voltage electric energy meter is consistent with the field arrangement. The appearance requirement of the low-voltage electric energy meter is consistent with that of a standard three-phase four-wire meter, the installation size requirement is consistent with field arrangement, and each performance index is consistent with that of the standard three-phase four-wire meter and a corresponding installation bracket is configured.

The high-voltage meter-mounting electricity-connecting practical training cabinet or/and the low-voltage meter-mounting electricity-connecting practical training cabinet is provided with a process camera device, the low-voltage meter-mounting electricity-connecting wiring of a student is shot according to a command signal, and the shot picture is transmitted to a computer; finally, the teacher is guided to evaluate the data before the computer, and the evaluation result is input into an evaluation system. When one of the low-voltage meter connection practical training cabinet and the high-voltage meter connection practical training cabinet is not provided with the process camera device, the teacher can judge and score on site.

The high-voltage meter connection practical training cabinet or/and the low-voltage meter connection practical training cabinet are/is also provided with an electric energy metering device connection error identification device for connection error detection training, and the electric energy metering device connection error identification device has an intelligent detection function, can automatically detect and judge errors or faults such as voltage loop short circuit, current loop open circuit and the like of an installation connection, and gives out fault indication (sound and light alarm); when the current and voltage loops have faults, the loops with faults send out fault indication, and the rest current and voltage loops without faults can normally operate so as to be beneficial to checking and judging wiring errors or fault conditions; the wiring correct and incorrect recognition device of the electric energy metering device is used for transmitting detected wiring correct and incorrect data to the computer. The wiring positive and negative identification device of the electric energy metering device is in communication connection with the computer through a 485 data receiving terminal. The utility model provides an electric energy metering device wiring positive and negative recognition device can adopt the circuit structure of the patent of publication number CN103869210A, including signal generator and signal receiver, and wherein, signal receiver is alarm circuit promptly can adopt gate circuit, also can adopt the singlechip for detect and judge the error or the trouble such as voltage return circuit short circuit, the current return circuit open circuit of installation wiring, and control send out the fault indication, and with the wiring positive and negative data transfer of detection for the computer. Of course, the device for identifying whether the wiring of the electric energy metering device is correct or not can also be communicated with a computer.

When one of the high-voltage meter-mounting electricity-connecting practical training cabinets and the low-voltage meter-mounting electricity-connecting practical training cabinets is not provided with the wiring error identification device, a learner can automatically use instruments (such as on-off of a measuring line of a universal meter) to detect and judge the error wiring and solve the error wiring when the meter-mounting electricity-connecting debugging, and a teacher is guided to supervise and evaluate the test result aside, and the test result is input into the test system.

The high-voltage fault setting controller comprises a switching power supply and a PLC controller, wherein the switching power supply is used for supplying power to the PLC controller, the output end of the PLC controller is connected with a plurality of intermediate relays for controlling the electrifying or the outage of the intermediate relays, and each intermediate relay is used for correspondingly controlling the electrifying or the outage of a high-voltage analog current transformer, a high-voltage analog voltage transformer and a contactor or a relay in an analog junction box respectively and controlling the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to set the high-voltage fault respectively; the low-voltage fault setting controller comprises a switching power supply and a PLC controller, wherein the switching power supply is used for supplying power to the PLC controller, the output end of the PLC controller is connected with a plurality of intermediate relays for controlling the power-on or power-off of the intermediate relays, and each intermediate relay is used for correspondingly controlling the power-on or power-off of a low-voltage analog current transformer, a contactor in an analog junction box or a relay respectively and controlling the low-voltage analog current transformer and the analog junction box to set the low-voltage fault respectively; the high-voltage fault setting controller and the low-voltage fault setting controller are in communication connection with the computer through a 485 data receiving terminal.

And a teacher is guided to send out a fault signal through a computer and sends the fault signal to a 485 data receiving terminal, the 485 data terminal sends the signal to a fault setting controller, and the fault setting controller controls the on-off state of a fault point to achieve a fault simulation effect. The computer sends a fault setting signal, and the fault setting controller controls the state of a fault point switch according to the fault setting signal sent by the computer to simulate and generate and trigger a corresponding fault so as to facilitate the field investigation of students. After the student starts to operate, the system feeds back the reading of the detection ammeter to the computer, and whether the correction is successful can be judged according to the reading of the ammeter. After the fault is set, the fault can be reset according to actual needs, and various anomalies are recovered to be normal.

The meter-mounting power-on practical training cabinet can be provided with the following functions according to the needs:

(1) And simulating the polarity, disconnection, phase failure and phase sequence faults of the voltage transformer.

① Simulating a positive polarity fault; simulating negative polarity faults

② Simulating three-phase disconnection; two-phase broken wire; single-phase broken wire

③ Simulating phase sequence faults of the transformer: a phase A-B; B-C phase; A-C phase

④ Simulating the lack of a U phase; lack of V phase; lack of W phase

(2) Polarity, disconnection, phase sequence fault simulation of the current transformer and 2-3 groups of transformation ratio simulation are carried out.

① Simulating positive polarity faults, namely U-positive and W-positive; and simulating negative faults, namely U-negative faults and W-negative faults.

② Simulating phase A broken lines; b phase broken line; c phase broken wire

③ Simulating phase sequence faults of the transformer: IS2-S1

④ Transformation ratios at 10KV/0.4KV voltage levels at 50KVA, 80KVA and 125KVA respectively

(3) And simulating secondary side pressure drop faults of the terminal box.

① U-phase voltage drop is set to 0.1V/A or 0.5V/A

② The V-phase pressure drop is set to 0.1V/A or 0.5V/A

③ W phase pressure drop is set to 0.1V/A or 0.5V/A

(4) And simulating undervoltage, undercurrent and partial pressure faults of the meter.

The low pressure dress table meets real standard cabinet of electricity can set up following function:

(1) Polarity, disconnection, phase sequence fault simulation of the current transformer and 2-3 groups of transformation ratio simulation are carried out.

① Simulating a positive polarity fault; simulating negative polarity faults

② Simulating phase A broken lines; b phase broken line; c phase broken wire

③ Simulating phase sequence faults of the transformer: IS2-S1

(2) And simulating secondary side pressure drop faults of the terminal box.

① The simulated secondary side resistance value is 0.1V/A

② The simulated secondary side resistance value is 0.5V/A

(3) And simulating undervoltage, undercurrent and partial pressure faults of the meter.

The low-voltage analog current transformer comprises a low-voltage current transformer shell for a trainee to conduct low-voltage meter installation practical training and a low-voltage current transformer analog circuit for the trainee to conduct fault maintenance practical training, wherein the low-voltage current transformer analog circuit comprises a plurality of relays and one or more (two or more) current transformers Ta, when the number of the current transformers Ta is multiple, primary sides P1 and P2 of the plurality of the current transformers Ta are connected in series between a current input terminal P1 and a current input terminal P2, secondary sides S1 and S2 of each current transformer Ta are connected with current output terminals S1 and S2 through transformation ratio switching relays respectively, each transformation ratio switching relay is used for correspondingly controlling a circuit between the secondary sides S1 and S2 of each current transformer Ta and the current output terminals S1 and S2, and the secondary sides S1 and the secondary sides S2 of the current transformers Ta corresponding to the transformation ratio switching relay J34 are in short circuit ratio between the secondary sides S1 and the secondary sides of the secondary sides S2 of the current transformers through the auxiliary ratio J34 except for the auxiliary ratio J ratio switching relay;

A relay J3 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S1 of the current transformer Ta and the current output terminal S1, and a relay J4 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S2 of the current transformer Ta and the current output terminal S2; a relay J1 and a relay J2 for controlling the forward and reverse of the secondary polarity are arranged on a circuit between the secondary sides S1 and S2 of the current transformer Ta and the current output terminals S1 and S2; one end of a first contact of the relay J1 is used for being connected with a secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with a current output terminal S1, one end of a second contact of the relay J1 is used for being connected with a secondary side S2 of the current transformer Ta, the other end of the second contact of the relay J1 is used for being connected with the current output terminal S2, one end of the first contact of the relay J2 is used for being connected with the secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with the current output terminal S2, and one end of the second contact of the relay J2 is used for being connected with the secondary side S2 of the current transformer Ta; each relay is connected with a low-voltage fault setting controller, and the low-voltage fault setting controller is used for controlling the power-on or power-off of each relay and controlling the closing or opening of the contact of the relay; the current input terminals P1 and P2 are used for being connected with a current output end of a power supply or a primary side terminal on the shell of the low-voltage transformer respectively, and the current output terminals S1 and S2 are used for being connected with a secondary side terminal on the shell of the low-voltage transformer or a current input end of an analog junction box or a low-voltage energy meter respectively; the low-voltage power transformer shell, the simulation junction box and the low-voltage power meter are respectively arranged on an operation surface arranged in a cabinet body of the low-voltage meter connection practical training cabinet, so that students can carry out low-voltage meter connection technical installation training; and a primary-side wiring terminal arranged on the shell of the low-voltage transformer is connected with a bus bar arranged at the voltage output end of the power supply. The primary side binding post P1 arranged on the low-voltage current transformer shell is connected with a bus bar arranged at the voltage output end of the power supply, and the primary side binding post P2 arranged on the low-voltage current transformer shell is used for being connected with an outlet end of the low-voltage meter connection practical training cabinet. The primary side wiring terminal P1 and the primary side wiring terminal P2 which are arranged on the shell of the low-voltage current transformer are in short circuit. The analog circuit of the low-voltage current transformer is arranged outside the shell of the low-voltage current transformer. The current transformer Ta is a common current transformer.

The current transformer analog circuit of the embodiment includes three current transformers Ta, and primary sides P1, P2 of a first current transformer Ta1, a second current transformer Ta2, and a third current transformer Ta3 are connected in series between a current input terminal P1 and a current input terminal P2. The primary side P1 of the first current transformer is connected with the current input terminal P1, the primary side P2 of the first current transformer is connected with the primary side P1 of the second current transformer, the primary side P2 of the second current transformer is connected with the primary side P1 of the third current transformer, and the primary side P2 of the third current transformer is connected with the current input terminal P2.

The secondary sides S1 and S2 of the first current transformer are respectively connected with the current output terminals S1 and S2 through the main contact of the transformation ratio switching relay J34, the secondary sides S1 and S2 of the second current transformer are respectively connected with the current output terminals S1 and S2 through the main contact of the transformation ratio switching relay J35, the secondary sides S1 and S2 of the third current transformer are respectively connected with the current output terminals S1 and S2 through the main contact of the transformation ratio switching relay J36, the secondary sides S1 and S2 of the first current transformer are in short circuit through the auxiliary contact J35-1 of the transformation ratio switching relay J35, and the secondary sides S1 and S2 of the first current transformer are in short circuit through the auxiliary contact J36-1 of the transformation ratio switching relay J36; the secondary side s1 and the secondary side s2 of the second current transformer are short-circuited through an auxiliary contact J34-1 of a transformation ratio switching relay J34, and the secondary side s1 and the secondary side s2 of the second current transformer are short-circuited through an auxiliary contact J36-2 of a transformation ratio switching relay J36; the secondary side s1 and the secondary side s2 of the third current transformer are short-circuited through an auxiliary contact J34-2 of the transformation ratio switching relay J34, and the secondary side s1 and the secondary side s2 of the third current transformer are short-circuited through an auxiliary contact J35-2 of the transformation ratio switching relay J35.

When the current transformers Ta are three, three transformers with different transformation ratios are used. In this embodiment, the transformation ratio of the first current transformer Ta1 is 15:5, the transformation ratio of the second current transformer Ta2 is 25:5, and the transformation ratio of the third current transformer Ta3 is 30:5. The current transformer analog circuit of the embodiment is used for realizing switching among the transformation ratios 75/5, 20/5 and 10/5.

The primary side binding post A on the first high-voltage potential transformer shell is used for being connected with the U-phase voltage output end of a power supply, the primary side binding post B on the first high-voltage potential transformer shell and the primary side binding post A on the second high-voltage potential transformer shell are both connected with the V-phase voltage output end of the power supply, the primary side binding post B on the second high-voltage potential transformer shell is used for being connected with the W-phase voltage output end of the power supply, the secondary side binding post a on the first high-voltage potential transformer shell is used for being connected with the voltage inlet wire terminal a of an analog junction box or the U-phase voltage input end of a high-voltage energy meter, the secondary side binding post B on the first high-voltage potential transformer shell and the secondary side binding post a on the second high-voltage potential transformer shell are both used for being connected with the voltage inlet wire terminal B of the analog junction box or the V-phase voltage input end of the high-voltage energy meter, and the secondary side binding post B on the second high-voltage potential transformer shell is used for being connected with the voltage inlet wire terminal c of the analog junction box or the W-phase voltage input end of the high-voltage meter. The high-voltage transformer analog circuit can be arranged in the first high-voltage transformer shell or the second high-voltage transformer shell, and can also be arranged outside the first high-voltage transformer shell or the second high-voltage transformer shell.

The analog current transformer adopts electric simulation, is simple and portable in structure, convenient to use, and completely consistent with the structure, wiring and appearance on site; referring to fig. 11, a current transformer housing of the analog current transformer is provided with a primary side wire inlet end P1, a primary side wire outlet end P2, a secondary side wire outlet end S1, a secondary side wire inlet end S2, a nut groove, and a training current transformer bottom plate.

The high-voltage analog voltage transformer adopts electric simulation, and is simple and portable in structure, convenient to use, and completely consistent with the structure, wiring and appearance on site; referring to fig. 12, a is an incoming line end of a primary side of an analog voltage transformer, B is an outgoing line end of a primary side of the analog voltage transformer, a is an incoming line end of a secondary side of the analog voltage transformer, and B is an outgoing line end of the secondary side of the analog voltage transformer; and 1 and 2 are nut grooves.

Two parallel circuits which are respectively controlled to be on-off by a first control switch and a second control switch are respectively arranged between each wire inlet end and the corresponding wire outlet end of the simulation junction box, a resistor is connected in series on one circuit, the first control switch and the second control switch are connected with a fault setting controller, and the fault setting controller is used for controlling the on-off of the first control switch and the second control switch; the first control switch and the second control switch adopt contactors or relays, the first control switch and the second control switch are normally open contacts and normally closed contacts of the contactors or relays respectively, and a resistor is connected in series on a circuit provided with the normally open contacts.

The appearance of the simulation junction box is consistent with that of a standard junction box, the installation size is consistent with that of on-site arrangement, and the electrical parameters are consistent with that of the standard junction box; the pressure drop simulation on the secondary side can be performed functionally.

The meter-mounted power-on training system further comprises a student training video tracking evaluation system disclosed in patent application number 201710392894.7, and the system comprises a station area video monitoring device, individual operation video monitoring devices and identification marks worn on the bodies of operators, wherein each individual operation video monitoring device is used for respectively shooting the field operation process of the corresponding operator in real time and transmitting the individual operation video data shot in real time to a video analysis processing workstation, and the video analysis processing workstation is used for receiving the individual operation video data, identifying the identity of the operator corresponding to the individual operation video data according to the unique mark corresponding to each individual operation video monitoring device and respectively storing the individual operation video data of each operator; the video monitoring device of each station area is used for shooting the corresponding practical training station area in real time, transmitting the station monitoring video data shot in real time to the video analysis processing workstation, wherein the video analysis processing workstation is used for receiving the station monitoring video data, completing the position positioning and the identity information identification of each operator according to the personnel identity identification mark information contained in each frame image of the station monitoring video data, comparing the position of each operator with the set movable range, analyzing whether each operator exceeds the allowed movable area, and prompting.

The meter-mounting electricity-connection training system further comprises a plurality of double-authorization control cabinets, wherein the outlet end of each double-authorization control cabinet is respectively connected with a power supply inlet wire terminal of the high-voltage meter-mounting electricity-connection practical training cabinet or the low-voltage meter-mounting electricity-connection practical training cabinet, and each double-authorization control cabinet is configured for each high-voltage meter-mounting electricity-connection practical training cabinet and each low-voltage meter-mounting electricity-connection practical training cabinet; the double-authorization control cabinet is provided with a power converter, a control module, a request input device, a prompt device, a power input interface used for being connected with a power supply and a power output interface used for being connected with a wire inlet end of a high-voltage power simulation device, a first power control switch and a second power control switch are connected in series on a simulation power transmission line between the power input interface and the power output interface, and the first power control switch is positioned between the power input interface and the second power control switch; the power converter is used for providing power for the control module; the request input device is used for collecting power-on requests and power-off requests of operators and transmitting the power-on requests and the power-off requests to the control module; the control module is used for respectively sending a power-on request signal and a power-off request signal to the first management platform and the second management platform, the first management platform is used for receiving the power-on request signal and the power-off request signal uploaded by the double-authorization management device, issuing an authorized power-on command and a power-off command to the control module of the double-authorization management device, and the control module is used for receiving the authorized power-on command and the power-off command issued by the first management platform, controlling the first power control switch to be closed and opened and reminding through the reminding device; the second management platform is used for receiving the power-on and power-off request signals uploaded by the double-authorization management device, issuing power-on and power-off authorization instructions to the control module of the double-authorization management device, and the control module is used for receiving the power-on and power-off authorization instructions issued by the second management platform, controlling the second power supply to control the switch to be turned on and off and reminding through the reminding device. The double-authorization cabinet has the same structure as the double-authorization management device disclosed in the patent application number 201710392178.9.

The power supply has the functions of voltage, current and phase sequence adjustment; the power supply adopts a virtual power supply with voltage output, current output and phase output functions, a wire inlet terminal of the virtual power supply is connected with a power supply wire inlet terminal arranged on a high-voltage meter-connection practical training cabinet or a low-voltage meter-connection practical training cabinet, the power supply wire inlet terminal is used for being connected with a wire outlet end of a double-authorization control cabinet, a contactor KM1 is arranged between the virtual power supply and the power supply wire inlet terminal and used for controlling the on-off of a circuit between the virtual power supply and the power supply wire inlet terminal, a coil of the contactor KM1 is connected with an emergency stop button JT and a relay J33 in series in a power supply loop of the contactor, and a coil of the relay J33 is connected with an output end of a corresponding fault setting controller which is used for controlling the power on or power off of the relay J33 and controlling the start and stop of the virtual power supply. And a safety indicator lamp is connected on a line between the virtual power supply and the power supply incoming line terminal. The virtual power supply only carries 485 or 232 communication, and only the control code of the virtual power supply is needed to compile the virtual power supply.

The power supply is arranged in the cabinet of the embodiment, and working voltage and working current are provided for the voltage transformer and the current transformer. The output voltage of the power supply is 3 multiplied by 100V (three-phase three-wire), and the single-phase output power is not less than 100VA; the output current is not less than 2X 30A, and the single-phase output power is not less than 100VA; the power supply has good fault-tolerant function, and any wiring error can not cause damage to the power supply. The power supply adopts a virtual power supply with voltage output, current output and phase output functions. The virtual power supply can realize under-voltage simulation, under-current simulation, phase-loss simulation, inductive/resistive load simulation, simulation output adjustable alternating voltage (0-380V), three-phase load unbalance simulation, simulation output adjustable current and simulation phase adjustment.

The meter-loading electricity-receiving training system is constructed by taking various power distribution cabinets as carriers, loading the installation and operation environment of a simulation site through a simulation load control system, and the site fault simulation meets the requirements of a high-compaction training system and a low-compaction training system. High-voltage meter connection practical training area: the wiring process training method comprises wiring process training, wiring correct and error detection training and fault simulation training. The high-voltage meter connection simulation is consistent with the on-site high-voltage meter connection content, and the power-on teaching training can be performed in a 400V environment. The low-voltage meter installation power connection training area comprises the following steps: the wiring process installation training and the measuring instrument use training are included; the fault simulation training is to observe and analyze various fault generation phenomena and results. The low-voltage meter connection simulation is consistent with the on-site low-voltage meter connection content.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The utility model provides a dress table meets electric training system which characterized in that: the high-voltage meter power-on practical training cabinet and the low-voltage meter power-on practical training cabinet are arranged in the high-voltage meter power-on practical training cabinet, and a high-voltage analog current transformer, a high-voltage analog voltage transformer, a high-voltage electric energy meter and an analog junction box for providing working voltage and working current for students to perform high-voltage meter power-on practical training and fault maintenance practical training are arranged in the high-voltage meter power-on practical training cabinet; the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box are respectively and electrically connected with the high-voltage fault setting controller, and the high-voltage fault setting controller is connected with the computer and is used for receiving instruction signals of the computer and respectively outputting control signals to the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to control the high-voltage analog current transformer to perform secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; the high-voltage analog voltage transformer is controlled to perform phase sequence transformation fault simulation setting, single-phase on-off fault simulation setting and open-phase fault simulation setting; the simulation junction box is controlled to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and the simulation junction box is used for observing, analyzing and training various fault generation phenomena and results of high-voltage meter power connection;

The low-voltage installation meter power-on practical training cabinet is internally provided with a low-voltage analog current transformer, a low-voltage energy meter and an analog junction box which are used for a student to conduct low-voltage installation practical training and fault maintenance practical training, and a power supply used for providing working voltage and working current, wherein the low-voltage analog current transformer and the analog junction box are respectively and electrically connected with a low-voltage fault setting controller, the low-voltage fault setting controller is connected with a computer and used for receiving instruction signals of the computer, respectively outputting control signals to the low-voltage analog current transformer and the analog junction box, and controlling the low-voltage analog current transformer in the low-voltage installation meter power-on practical training cabinet to conduct secondary side polarity positive and negative fault analog setting, line on-off fault analog setting and transformation ratio switching fault analog setting; the simulation junction box is controlled to perform open-circuit fault simulation setting and loop impedance exceeding fault simulation setting, and the simulation junction box is used for observing, analyzing and training various fault generation phenomena and results of low-voltage meter power connection;

A relay J3 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S1 of the current transformer Ta and the current output terminal S1, and a relay J4 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S2 of the current transformer Ta and the current output terminal S2; a relay J1 and a relay J2 for controlling the forward and reverse of the secondary polarity are arranged on a circuit between the secondary sides S1 and S2 of the current transformer Ta and the current output terminals S1 and S2; one end of a first contact of the relay J1 is used for being connected with a secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with a current output terminal S1, one end of a second contact of the relay J1 is used for being connected with a secondary side S2 of the current transformer Ta, the other end of the second contact of the relay J1 is used for being connected with the current output terminal S2, one end of the first contact of the relay J2 is used for being connected with the secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with the current output terminal S2, and one end of the second contact of the relay J2 is used for being connected with the secondary side S2 of the current transformer Ta; each relay is connected with a high-voltage fault setting controller, and the high-voltage fault setting controller is used for controlling the power-on or power-off of each relay and controlling the closing or opening of the contact of the relay; the current input terminals P1 and P2 are used for being respectively connected with a primary side wiring terminal on the high-voltage current transformer shell or a current output end of a power supply, and the current output terminals S1 and S2 are used for being respectively connected with a secondary side wiring terminal on the high-voltage current transformer shell or a current input end of an analog wiring box or a high-voltage energy meter;

A relay J3 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S1 of the current transformer Ta and the current output terminal S1, and a relay J4 for controlling the on-off of the circuit is arranged on the circuit between the secondary side S2 of the current transformer Ta and the current output terminal S2; a relay J1 and a relay J2 for controlling the forward and reverse of the secondary polarity are arranged on a circuit between the secondary sides S1 and S2 of the current transformer Ta and the current output terminals S1 and S2; one end of a first contact of the relay J1 is used for being connected with a secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with a current output terminal S1, one end of a second contact of the relay J1 is used for being connected with a secondary side S2 of the current transformer Ta, the other end of the second contact of the relay J1 is used for being connected with the current output terminal S2, one end of the first contact of the relay J2 is used for being connected with the secondary side S1 of the current transformer Ta, the other end of the first contact of the relay J1 is used for being connected with the current output terminal S2, and one end of the second contact of the relay J2 is used for being connected with the secondary side S2 of the current transformer Ta; each relay is connected with a low-voltage fault setting controller, and the low-voltage fault setting controller is used for controlling the power-on or power-off of each relay and controlling the closing or opening of the contact of the relay; the current input terminals P1 and P2 are used for being connected with a current output end of a power supply or a primary side terminal on the shell of the low-voltage transformer respectively, and the current output terminals S1 and S2 are used for being connected with a secondary side terminal on the shell of the low-voltage transformer or a current input end of an analog junction box or a low-voltage energy meter respectively;

the high-voltage meter connection practical training cabinet or/and the low-voltage meter connection practical training cabinet further comprises a wiring correct and incorrect recognition device of the electric energy metering device for wiring correct and incorrect detection training, the wiring correct and incorrect recognition device of the electric energy metering device has an intelligent detection function, can automatically detect and judge errors or faults of a voltage loop and a current loop of an installation wiring, and gives out fault indication; when the current and voltage loops have faults, the loop with the faults sends out fault indication, and the rest current and voltage loops without faults can normally operate;

Sending a fault signal through a computer, sending the fault signal to a 485 data receiving terminal, and sending the signal to a fault setting controller by the 485 data terminal, wherein the fault setting controller controls the on-off state of a fault point to achieve a fault simulation effect; the computer sends a fault setting signal, the fault setting controller controls the fault point switch state according to the fault setting signal sent by the computer to simulate and generate and trigger corresponding faults so as to facilitate the on-site investigation and elimination of faults of students, and after the students start to operate, the system feeds back the reading of the detection ammeter to the computer, and whether the correction is successful or not can be judged according to the reading of the ammeter.

2. The meter-on power-on training system of claim 1, wherein: the high-voltage meter-mounting electricity-connecting practical training cabinet or/and the low-voltage meter-mounting electricity-connecting practical training cabinet are internally provided with a process camera device, and the process camera device is used for shooting the meter-mounting electricity-connecting wiring of a student according to a command signal, transmitting the shot picture to a computer, and receiving the picture transmitted by the process camera device by the computer for storage and display; the process camera device is in communication connection with the computer through the wireless data receiving terminal.

3. The meter-on power-on training system of claim 1, wherein: the wiring positive and negative identification device of the electric energy metering device is used for transmitting the detected wiring positive and negative data to the computer, and the computer receives the wiring positive and negative data transmitted by the wiring positive and negative identification device of the electric energy metering device, stores and displays the wiring positive and negative data; the wiring positive and negative identification device of the electric energy metering device is in communication connection with the computer through a 485 data receiving terminal.

4. The meter-on power-on training system of claim 1, wherein: the high-voltage fault setting controller comprises a switching power supply and a PLC controller or a singlechip, wherein the switching power supply is used for supplying power to the PLC controller, the output end of the PLC controller is connected with a plurality of intermediate relays for controlling the electrifying or the outage of the intermediate relays, and each intermediate relay is used for correspondingly controlling the electrifying or the outage of a high-voltage analog current transformer, a high-voltage analog voltage transformer and a contactor or a relay in an analog junction box respectively and controlling the high-voltage analog current transformer, the high-voltage analog voltage transformer and the analog junction box to carry out high-voltage fault setting respectively; the low-voltage fault setting controller comprises a switching power supply and a PLC controller or a singlechip, wherein the switching power supply is used for supplying power to the PLC controller, the output end of the PLC controller is connected with a plurality of intermediate relays for controlling the power-on or power-off of the intermediate relays, and each intermediate relay is used for correspondingly controlling the power-on or power-off of a low-voltage analog current transformer and a contactor or a relay in an analog junction box respectively and controlling the low-voltage analog current transformer and the analog junction box to set the low-voltage fault respectively; the high-voltage fault setting controller and the low-voltage fault setting controller are in communication connection with the computer through a 485 data receiving terminal;

5. The meter-on power-on training system of claim 1, wherein: the high-voltage transformer shell, the simulation junction box and the high-voltage energy meter are respectively installed on an operation surface arranged in a cabinet body of the high-voltage meter power-on practical training cabinet, so that students can carry out high-voltage meter power-on process installation training.

6. The meter-on power-on training system of claim 1, wherein: the low-voltage power transformer shell, the simulation junction box and the low-voltage power meter are respectively arranged on an operation surface arranged in a cabinet body of the low-voltage meter connection practical training cabinet, so that students can carry out low-voltage meter connection technical installation training; and a primary-side wiring terminal arranged on the shell of the low-voltage transformer is connected with a bus bar arranged at the voltage output end of the power supply.

7. The meter-on power-on training system of claim 1, wherein: the analog voltage transformer comprises two high-voltage transformer shells for a student to carry out high-voltage meter installation practical training and a high-voltage transformer analog circuit for the student to carry out fault maintenance practical training, the high-voltage transformer analog circuit comprises a three-phase transformer and a plurality of control switches, a primary side A of the three-phase transformer is connected with a voltage wiring terminal A through a first control switch, a primary side B of the three-phase transformer is respectively connected with the voltage wiring terminal B through a second control switch, and a primary side C of the three-phase transformer is connected with the voltage wiring terminal C through a third control switch; the secondary side a of the three-phase transformer is connected with voltage wiring terminals a, b and c through a fourth control switch, a fifth control switch and a sixth control switch respectively, the secondary side b of the three-phase transformer is connected with voltage wiring terminals a, b and c through a seventh control switch, an eighth control switch and a ninth control switch respectively, and the secondary side c of the three-phase transformer is connected with voltage wiring terminals a, b and c through a tenth control switch, an eleventh control switch and a twelfth control switch respectively;

the primary side wiring terminal A on the first high-voltage transformer shell is used for being connected with a U-phase voltage output end of a power supply, the primary side wiring terminal B on the first high-voltage transformer shell and the primary side wiring terminal A on the second high-voltage transformer shell are both connected with a V-phase voltage output end of the power supply, the primary side wiring terminal B on the second high-voltage transformer shell is used for being connected with a W-phase voltage output end of the power supply, the secondary side wiring terminal a on the first high-voltage transformer shell is used for being connected with a voltage inlet terminal a of an analog junction box or a U-phase voltage input end of a high-voltage energy meter, the secondary side wiring terminal B on the first high-voltage transformer shell and the secondary side wiring terminal a on the second high-voltage transformer shell are both used for being connected with a voltage inlet terminal B of the analog junction box or a V-phase voltage input end of the high-voltage energy meter, and the secondary side wiring terminal B on the second high-voltage transformer shell is used for being connected with a voltage inlet terminal c of the analog junction box or a W-phase voltage input end of the high-voltage meter;

Or the analog voltage transformer comprises two high-voltage transformer shells for a learner to carry out high-voltage meter installation practical training and a high-voltage transformer analog circuit for the learner to carry out fault maintenance practical training, the high-voltage transformer analog circuit comprises a plurality of control switches, one ends of a fourth control switch, a fifth control switch and a sixth control switch are all connected with a voltage wiring terminal A, the other ends of the fourth control switch, the fifth control switch and the sixth control switch are respectively connected with voltage wiring terminals a, B and C, one ends of a seventh control switch, an eighth control switch and a ninth control switch are respectively connected with voltage wiring terminals B, the other ends of the seventh control switch, the eighth control switch and the ninth control switch are respectively connected with voltage wiring terminals a, B and C, one ends of the tenth control switch, the eleventh control switch and the twelfth control switch are respectively connected with voltage wiring terminals C, and the other ends of the tenth control switch, the eleventh control switch and the twelfth control switch are respectively connected with voltage wiring terminals a, B and C; the first control switch is connected in series between the voltage wiring terminal A and the voltage wiring terminal a, the second control switch is connected in series between the voltage wiring terminal B and the voltage wiring terminal B, and the third control switch is connected in series between the voltage wiring terminal C and the voltage wiring terminal C;

8. The meter-on power-on training system of claim 1, wherein: two parallel circuits which are respectively controlled to be on-off by a first control switch and a second control switch are respectively arranged between each wire inlet end and the corresponding wire outlet end of the simulation junction box, a resistor is connected in series on one circuit, the first control switch and the second control switch are connected with a corresponding fault setting controller, and the fault setting controller is used for controlling the on-off of the first control switch and the second control switch; the first control switch and the second control switch adopt contactors or relays, the first control switch and the second control switch are normally open contacts and normally closed contacts of the contactors or relays respectively, and a resistor is connected in series on a circuit provided with the normally open contacts.

9. The meter-on power-on training system of claim 1, wherein: the system also comprises a plurality of double-authorization control cabinets, wherein the outlet end of each double-authorization control cabinet is respectively connected with a power inlet wire terminal of the high-voltage meter-connection practical training cabinet or the low-voltage meter-connection practical training cabinet, and each high-voltage meter-connection practical training cabinet and each low-voltage meter-connection practical training cabinet are respectively provided with a double-authorization control cabinet; the double-authorization control cabinet is provided with a power converter, a control module, a request input device, a prompt device, a power input interface used for being connected with a power supply and a power output interface used for being connected with a wire inlet end of a high-voltage power simulation device, a first power control switch and a second power control switch are connected in series on a simulation power transmission line between the power input interface and the power output interface, and the first power control switch is positioned between the power input interface and the second power control switch; the power converter is used for providing power for the control module; the request input device is used for collecting power-on requests and power-off requests of operators and transmitting the power-on requests and the power-off requests to the control module; the control module is used for respectively sending a power-on request signal and a power-off request signal to the first management platform and the second management platform, the first management platform is used for receiving the power-on request signal and the power-off request signal uploaded by the double-authorization management device, issuing an authorized power-on command and a power-off command to the control module of the double-authorization management device, and the control module is used for receiving the authorized power-on command and the power-off command issued by the first management platform, controlling the first power control switch to be closed and opened and reminding through the reminding device; the second management platform is used for receiving the power-on and power-off request signals uploaded by the double-authorization management device, issuing power-on and power-off authorization instructions to the control module of the double-authorization management device, and the control module is used for receiving the power-on and power-off authorization instructions issued by the second management platform, controlling the second power supply to control the switch to be turned on and off and reminding through the reminding device; the power supply has the functions of voltage, current and phase sequence adjustment; the power supply adopts the virtual power supply that has voltage output, current output and phase output function, virtual power supply's inlet wire terminal connects real standard cabinet of electric or low pressure dress table to connect the real power inlet wire terminal that the standard cabinet was equipped with of electric, power inlet wire terminal is used for being connected with the commercial power, be equipped with contactor KM1 between virtual power supply and the power inlet wire terminal for control virtual power and the break-make of the circuit between the power inlet wire terminal, contactor KM 1's coil and scram button JT, relay J33 establish ties in the power supply loop of contactor, and relay J33's coil is connected with the output of the fault setting controller that corresponds, and this fault setting controller is used for controlling relay J33 circular telegram or outage, control virtual power supply's start-stop.

10. The meter-on power-on training system of claim 1, wherein: the system comprises a station area video monitoring device, individual operation video monitoring devices and identification marks worn on operators, wherein each individual operation video monitoring device is used for respectively shooting the field operation process of the corresponding operator in real time and transmitting the individual operation video data shot in real time to a video analysis processing workstation, and the video analysis processing workstation is used for receiving the individual operation video data and identifying the identity of the operator corresponding to the individual operation video data according to the unique mark corresponding to each individual operation video monitoring device and respectively storing the individual operation video data of each operator; the video monitoring device of each station area is used for shooting the corresponding practical training station area in real time, transmitting the station monitoring video data shot in real time to the video analysis processing workstation, wherein the video analysis processing workstation is used for receiving the station monitoring video data, completing the position positioning and the identity information identification of each operator according to the personnel identity identification mark information contained in each frame image of the station monitoring video data, comparing the position of each operator with the set movable range, analyzing whether each operator exceeds the allowed movable area, and prompting.