CN113176438A - Transformer substation secondary circuit detector and detection method - Google Patents
Transformer substation secondary circuit detector and detection method Download PDFInfo
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- CN113176438A CN113176438A CN202110407019.8A CN202110407019A CN113176438A CN 113176438 A CN113176438 A CN 113176438A CN 202110407019 A CN202110407019 A CN 202110407019A CN 113176438 A CN113176438 A CN 113176438A
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- 238000001514 detection method Methods 0.000 title claims abstract description 166
- 238000012360 testing method Methods 0.000 claims abstract description 55
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- 238000004891 communication Methods 0.000 claims abstract description 19
- 239000000523 sample Substances 0.000 claims description 10
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- 230000005611 electricity Effects 0.000 claims 6
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 241000272201 Columbiformes Species 0.000 description 2
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- 238000004870 electrical engineering Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/40—Display of information, e.g. of data or controls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The transformer substation secondary circuit detector comprises a box body, wherein an HMI (human machine interface) man-machine interaction display screen is arranged on the box body, the HMI man-machine interaction display screen is in communication connection with a voltage detection module in the box body, the input end of the voltage detection module is electrically connected with a test wire socket, the test wire socket is fixedly connected with the side wall of the box body, the test wire socket is detachably connected with an external detection gauge pen, the voltage detection module is in electric contact with a wiring terminal strip on a secondary circuit through the detection gauge pen, detects the electric state of each node in the secondary circuit, and displays state parameters on the HMI man-machine interaction display screen. Through setting up a plurality of test wire sockets on the box body, will detect the electric node state that pen-shape metre department is connected and detect through voltage detection module to show on HMI human-computer interaction display screen, can make things convenient for operation and maintenance personnel to once only look over all node states, still can transmit the PC terminal or the handheld terminal storage of testing result in to the transformer substation through wireless transmission, the power supply gas engineering personnel look up.
Description
Technical Field
The invention relates to the field of transformer substation operation and maintenance, in particular to a transformer substation secondary circuit detector and a detection method.
Background
In an electric power system, a power plant converts natural primary energy into electric energy and transmits the electric energy to a remote electric power user, and in order to reduce electric energy loss and line impedance voltage drop on an electric transmission line, the voltage needs to be increased; in order to satisfy the safety requirements of power consumers, the voltage is reduced and distributed to each consumer, which requires a substation capable of increasing and decreasing the voltage and distributing electric energy. Therefore, the transformer substation is an electrical device for transforming voltage, receiving and distributing electric energy in the power system, is an intermediate link for connecting a power plant and a power consumer, and simultaneously connects power grids of various voltage levels through the transformer substation, and is used for transforming voltage, transmitting and distributing electric energy. The main equipment of the transformer substation is divided into primary equipment and secondary equipment.
The secondary equipment of the transformer substation is low-voltage electrical equipment which is required for monitoring, controlling, adjusting and protecting the work of primary equipment and providing operation conditions or production command signals for operation and maintenance personnel, the power system is also provided with corresponding information and control systems at all links and different levels, the production process of electric energy is measured, adjusted, controlled, protected, communicated and scheduled so as to ensure that users obtain safe and high-quality electric energy, and the information and control system comprises various detection equipment, fuses, control switches, control cables, measuring instruments, relays, control and signal elements, an automatic device, a relay protection device, current, a voltage transformer, communication equipment, a safety protection device, an automatic control device, monitoring automation and scheduling automation systems. The secondary devices are connected together according to certain requirements to form an electrical loop for monitoring, controlling, regulating and protecting the primary devices, and the electrical loop is called a secondary loop or a secondary wiring system.
The normal stable operation of transformer substation is from not opening the reliable and stable operation of each components and parts in the secondary circuit, therefore the operation and maintenance personnel need often to establish the factory to each electric node in the secondary circuit, in ordinary testing process, carry out the inspection point by point to each node that needs to detect through using the universal meter usually, main check voltage situation and present operating mode whether match, in the secondary circuit, the node that needs to detect is numerous, the point by point detection is wasted time and energy, also can not carry out data storage, the power supply engineer refers to.
Disclosure of Invention
The invention aims to solve the technical problem of providing a transformer substation secondary circuit detector and a detection method, which can detect all node state parameters at one time when operation and maintenance personnel carry out live detection, display the electrical parameters and transmit the detection result to a transformer substation operation and maintenance terminal through a wireless transmission module.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the secondary circuit detector of the transformer substation comprises a box body, wherein an HMI (human machine interface) man-machine interaction display screen is arranged on the box body, the HMI man-machine interaction display screen is in communication connection with a detection controller in the box body, the detection controller is in communication connection with a voltage detection module, the input end of the voltage detection module is electrically connected with a detection meter pen, the detection meter pen is in electrical contact with a wiring terminal strip on the secondary circuit, and the voltage detection module detects the electrical state of each node in the secondary circuit and displays state parameters on the HMI man-machine interaction display screen.
The detection controller is in communication connection with the wireless transmission module, a wireless transmission antenna of the wireless transmission module extends out of the box body, a wireless gateway outside the box body receives signals sent by the wireless transmission module through wireless communication, and the wireless gateway is in communication connection with the PC terminal or the mobile terminal.
The wiring terminal strip is provided with a test contact, the test contact is connected with a test plug, and the detection meter pen is electrically contacted with the test contact by inserting the test plug.
The detection pens are provided with a plurality of detection pens, each detection pen is provided with a number display seven-segment digital tube, the number display seven-segment digital tubes are electrically connected with the output end of the detection controller, and the detection controller receives an instruction at the position of the human-computer interaction display screen of the HMI and controls each number display seven-segment digital tube to display the number of the corresponding node to be detected on the secondary loop.
The electric connection structure of the detection meter pen, the detection controller and the voltage detection module is as follows: the detection meter pen comprises a meter rod, a probe is arranged at the front end of the meter rod, a cable is arranged at the tail end of the meter rod, the cable is connected with a test line plug, the probe and a serial number display seven-segment digital tube are electrically connected with the test line plug, the test line plug is detachably connected with a test line socket on the side wall of the box body, the test line socket is electrically connected with a detection meter pen adapter in the box body, and the detection meter pen adapter is electrically connected with the input end of the voltage detection module and the output end of the detection controller.
The number display seven-segment digital tube on the detection meter pen adopts dynamic display control.
A power socket is arranged on the side wall of the box body, the power socket is electrically connected with a rectifying module in the box body, the rectifying module provides power for the voltage detection module, the detection controller and the wireless transmission module, and the output end of the rectifying module is electrically connected with the storage battery.
The box body is provided with a power switch which is electrically connected with the rectification module.
The wireless transmission module and the wireless gateway adopt an LORA wireless transmission protocol.
The detection method using the transformer substation secondary circuit detector comprises the following specific steps:
initializing a detector, inputting the voltage, the line number and the type of an electric element of a terminal node to be detected of each secondary circuit into a detection controller according to the circuit structure and the electric property of the secondary circuit to be detected of a transformer substation, editing a graphical interface and parameters of an HMI (human machine interface) man-machine interaction display screen, and corresponding the graphical interface and the parameters to the parameters in the detection controller one by one;
when detecting the secondary loop, an operator selects a corresponding loop on an HMI (human machine interface) interactive display screen according to the currently detected loop, and the detection controller controls a number display seven-segment digital tube on each detection pen to display the terminal row line number of the corresponding detection node according to the internal line number parameter after receiving the signal;
inserting test plugs into test contacts of terminals corresponding to the line numbers on the wiring terminal strip according to the line numbers of the terminal strip of the to-be-detected node displayed on the detection meter pen, and then inserting probes of the detection meter pen into the corresponding test plugs in a one-to-one correspondence manner;
the voltage detection module detects the voltage of each detection meter pen, the detection result is transmitted to the detection controller, the detection controller compares the detection value with a preset standard value, the detection result is transmitted to the HMI human-computer interaction display screen and the wireless transmission module, the HMI human-computer interaction display screen displays the result and the parameters on the display screen according to the detection result, the nodes meeting the standard are displayed by green nodes, and the nodes exceeding the preset standard range are displayed by red nodes;
and step five, the wireless gateway receives the detection result data sent by the wireless transmission module at each secondary loop and sends the data to the PC terminal and the mobile terminal, and the detection results of all the secondary loops are summarized on the PC terminal and the mobile terminal.
The invention provides a transformer substation secondary circuit detector and a detection method, wherein a plurality of test wire sockets are arranged on a box body to realize secondary circuit live detection, the states of electric nodes connected with detection pens are detected through a voltage detection module and displayed on an HMI (human machine interface) man-machine interaction display screen, operation and maintenance personnel can conveniently check the states of all the nodes at one time, the detection results can also be transmitted to a PC (personal computer) terminal or a handheld terminal in a transformer substation through wireless transmission to be stored for the electrical engineering personnel to check, standard parameters of different circuits can be built in, the circuit line number corresponding to each meter pen is displayed on a seven-segment digital tube on the detection meter pen, the meter pens correspond to the detection terminals one by one, and a plurality of sets of meter pens are not required to be prepared.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection between the test meter pen and the terminal block;
FIG. 3 is a schematic structural diagram of a secondary circuit detector;
FIG. 4 is a front view of FIG. 3;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is an electrical schematic of the present invention;
FIG. 7 is a schematic structural diagram of a detection stylus;
FIG. 8 is a control circuit diagram of a numbered seven-segment nixie tube;
FIG. 9 is a schematic diagram of the connection of a rectifier module to a battery module;
FIG. 10 is a schematic diagram of one of the secondary circuit branches in the embodiment.
In the figure: the device comprises a secondary loop detector 1, a wiring terminal strip 2, a test plug 21, a detection meter pen 3, a meter rod 31, a probe 32, a seven-segment numbering tube 33 for number display, a cable 34, a box body 4, a power socket 5, an HMI human-machine interaction display screen 6, a wireless transmission module 7, a power switch 8, a voltage detection module 9, a rectification module 10, a storage battery 11, a test line socket 12, a wireless gateway 13, a PG terminal 14, a mobile terminal 15, a test line plug 16, a detection controller 17 and a detection meter pen adapter 18.
Detailed Description
As shown in fig. 1-4, the transformer substation secondary circuit detector comprises a box body 4, an HMI man-machine interaction display screen 6 is arranged on the box body 4, the HMI man-machine interaction display screen 6 is in communication connection with a detection controller 17 in the box body, the detection controller 17 is in communication connection with a voltage detection module 9, an input end of the voltage detection module 9 is electrically connected with a detection meter pen 3, the detection meter pen 3 is electrically connected with a wiring terminal block 2 on the secondary circuit, the voltage detection module 9 detects the electrical state of each node in the secondary circuit and displays the state parameters on the HMI man-machine interaction display screen 6, the voltage detection module 9 is used for detecting the electrical parameters at each node, the electrical parameters are transmitted to the detection controller 17 through the communication interface to be compared with preset values, and the comparison result is transmitted to the HMI human-computer interaction display screen 6 to be displayed, so that operation and maintenance personnel can observe the electrical parameters visually on the detection site conveniently.
As shown in fig. 6, the detection controller 17 is in communication connection with the wireless transmission module 7, a wireless transmission antenna of the wireless transmission module 7 extends out of the box body 4, the wireless gateway 13 outside the box body 4 receives a signal sent by the wireless transmission module 7 through wireless communication, the wireless gateway 13 is in communication connection with the PC terminal 14 or the mobile terminal 15, a detection result of the detection controller 17 can be transmitted to the wireless transmission module 7 through an interface, the wireless transmission module 7 is transmitted to the wireless gateway 13 through a wireless network, and the wireless gateway 13 transmits information to the PC terminal 14 or the mobile terminal 15 for storage, so that the information can be referred by electrical engineering personnel.
As shown in fig. 2, the connection terminal block 2 is provided with a test contact, the test contact is connected with a test plug 21, the test meter pen 3 is electrically contacted with the test contact by inserting the test plug 21, the test plug 21 does not need to perform additional disassembling work on the connection terminal during detection, and the special detection jack enables the detection process to be safe and fast.
As shown in fig. 1, 5 and 7, the detection pens 3 are provided with a plurality of nodes to be detected on the secondary loop, each detection pen 3 is provided with a seven-segment numbering tube 33 with number display, the seven-segment numbering tube 33 with number display is electrically connected with the output end of the detection controller 17, and the detection controller 17 receives an instruction at the HMI man-machine interaction display screen 6 to control each seven-segment numbering tube 33 with number display to display the number of the corresponding node to be detected on the secondary loop.
As shown in fig. 5 to 7, the electrical connection structure of the detection stylus 3, the detection controller 17 and the voltage detection module 9 is as follows: the detection meter pen 3 comprises a meter rod 31, a probe 32 is arranged at the front end of the meter rod 31, a cable 34 is arranged at the tail end of the meter rod 31, the cable 34 is connected with a test line plug 16, the probe 32 and a numbering display seven-segment nixie tube 33 are electrically connected with the test line plug 16, the test line plug 16 is detachably connected with a test line socket 12 on the side wall of the box body 4, the test line socket 12 is electrically connected with a detection meter pen adapter 18 in the box body 4, the detection meter pen adapter 18 is electrically connected with the input end of the voltage detection module 9 and the output end of the detection controller 17, through the one-to-one correspondence of the output ends of the detection meter pen adapter 18, the test line socket 12 and the detection controller 17, the serial numbers displayed on the detection meter pens 3 connected with the corresponding test line socket 12 are controlled by the detection controller 17, all the detection meter pens 3 are completely the same, and different line number serial numbers are displayed according to different test line sockets 12.
As shown in fig. 8, the number display seven-segment nixie tube 33 on the detection stylus 3 adopts dynamic display control, the detection controller 17 sends out a displayed number through PE0-PE7 signals at an output end, corresponding triode is controlled to be connected for bit selection through PD1-PD2N signals, different seven-segment nixie tubes are connected at each moment, simultaneous number display of a plurality of detection styluses 3 is realized through a persistence effect of human eyes, output IO points required by the detection controller 17 can be reduced through dynamic display control, and cost is reduced.
As shown in fig. 5 and 9, the side wall of the box body 4 is provided with a power socket 5, the power socket 5 is electrically connected with a rectifier module 10 in the box body 4, the rectifier module 10 provides power for the voltage detection module 9, the detection controller 17 and the wireless transmission module 7, the output end of the rectifier module 10 is electrically connected with a storage battery 11, and through the rectifier module 10 and the storage battery 11, the detector can be powered through the power socket 5 and also can be self-powered by the storage battery 11, thereby preventing some situations that no power socket exists in the secondary loop control box.
The box body 4 is provided with a power switch 8, the power switch 8 is electrically connected with a rectification module 10, and the power switch 8 controls the instrument to be powered up and down.
The wireless transmission module 7 and the wireless gateway 13 adopt an LORA wireless transmission protocol, the existing LORA wireless transmission protocol can be transmitted to a kilometer level or more, and the requirement that each secondary circuit control box in a large-scale transformer substation is far away can be met.
The detection controller 17 may be a PLC, such as a PLC model 6ES7214-1AG40-0XB0 manufactured by SIEMENS, Inc.
The voltage detection module 9 is a commercially available product, such as ZH-44241-34F2 fully isolated dc voltage collector manufactured by zhizhen zhixianghe company, and adopts an ethernet interface.
The wireless transmission module 7 is a commercially available product, and for example, a WT100 point-to-multipoint wireless transmission module manufactured by shenzhen golden pigeon technologies ltd performs data transmission through an LORA wireless network.
The wireless gateway 13 is a commercially available product, such as an S2814G LORA gateway manufactured by shenzhen king pigeon technologies ltd, and can be connected to the PC, the data cloud, and the mobile terminal.
The detection method using the transformer substation secondary circuit detector comprises the following specific steps:
initializing a detector, inputting the voltage, the line number and the type of an electric element of a terminal node to be detected of each secondary circuit into a detection controller 17 according to the circuit structure and the electric property of the secondary circuit to be detected of the transformer substation, editing a graphical interface and parameters of an HMI (human machine interface) human-computer interaction display screen 6, and enabling the graphical interface and the parameters to be in one-to-one correspondence with the parameters in the detection controller 17;
step two, when detecting the secondary loop, an operator selects a corresponding loop on the HMI (human machine interface) human-computer interaction display screen 6 according to the currently detected loop, and the detection controller 17 controls the number display seven-segment digital tube 33 on each detection pen pointer 3 to display the terminal row line number of the corresponding detection node according to the internal line number parameter after receiving the signal;
step three, inserting the test plug 21 into the test contact of the terminal corresponding to the wire number on the wiring terminal block 2 according to the terminal block wire number of the node to be detected displayed on the detection stylus 3, and then inserting the probes 32 of the detection stylus 3 into the corresponding test plugs 21 in a one-to-one correspondence manner;
step four, the voltage detection module 9 detects the voltage at each detection meter pen 3 and transmits the detection result to the detection controller 17, the detection controller 17 compares the detection value with a preset standard value and transmits the detection result to the HMI human-machine interaction display screen 6 and the wireless transmission module 7, the HMI human-machine interaction display screen 6 displays the result and the parameters on the display screen according to the detection result, the nodes meeting the standard are displayed by green nodes, and the nodes exceeding the preset standard range are displayed by red nodes;
and step five, the wireless gateway 13 receives the detection result data sent by the wireless transmission module 7 at each secondary loop, and sends the data to the PC terminal 14 and the mobile terminal 15, and the detection results of all the secondary loops are summarized on the PC terminal 14 and the mobile terminal 15.
As shown in fig. 10, for example, a closing circuit in a secondary circuit of a 110kV LW36-126 outdoor high-voltage SF6 circuit breaker is illustrated, when the switch is in a normal state, the upper end of a three-phase operation box of the closing circuit is linked with a common positive voltage +110V, a node strip No. 75 +110V is connected to the ground voltage, a selector switch, an intermediate relay, an auxiliary switch, a travel switch and a selector switch at the lower end of the three-phase operation box are in a normally closed state, the common negative voltage-110V is connected, and a node strip-110V is connected to the ground voltage from 107 to 83. If the voltage of the node 75 is not +110V and the voltage of the nodes 107 to 83 is not-110V, the cable related to the node may be open, short-circuited, grounded or a selection switch, an intermediate relay, an auxiliary switch, a travel switch, a selection switch and a closing coil may be in fault.
The traditional secondary circuit fault detection is that a universal meter is used for measuring the voltage of each node in a circuit, a breaker protection screen, a breaker terminal box and a breaker mechanism box are distributed on each node in a closing circuit, sometimes, after the circuit state is switched, voltage and other parameters are measured again, the number of measuring positions is large, measuring personnel measure the voltage and other parameters back and forth, the measuring steps are very complicated, and the voltage and other parameters of all nodes in the whole circuit cannot be obtained in real time.
The secondary circuit fault detector can place a measuring device at each measuring place, a plurality of measuring wire clamps are led out from the measuring device, each measuring wire clamp is placed on a terminal block, the plurality of measuring devices transmit collected node electrical parameters to handheld collecting terminals of measuring personnel through wireless transmission, no matter how the state quantity of a secondary circuit changes, the electrical state parameters of the whole circuit are displayed in real time, once 75 node voltages are not +110V and 107-83 node voltages are not-110V, the terminals automatically alarm, and secondary maintenance personnel are helped to quickly and accurately find faults such as open circuits, short circuits and grounding in the circuit.
Claims (10)
1. Transformer substation's secondary circuit detector, a serial communication port, comprises a box body (4), be equipped with HMI human-computer interaction display screen (6) on box body (4), HMI human-computer interaction display screen (6) are connected with detection controller (17) communication in the box body, it connects to detect controller (17) and voltage detection module (9) communication, the input and the detection pen-shape metre (3) electricity of voltage detection module (9) are connected, it arranges (2) electrical contact with binding post on secondary circuit to detect pen-shape metre (3), voltage detection module (9) detect the electrical state of each node in the secondary circuit, and show state parameter on HMI human-computer interaction display screen (6).
2. The substation secondary circuit detector of claim 1, wherein: the detection controller (17) is in communication connection with the wireless transmission module (7), a wireless transmission antenna of the wireless transmission module (7) extends out of the box body (4), a wireless gateway (13) outside the box body (4) receives signals sent by the wireless transmission module (7) through wireless communication, and the wireless gateway (13) is in communication connection with the PC terminal (14) or the mobile terminal (15).
3. The substation secondary circuit detector of claim 2, wherein: binding post row (2) on be equipped with the test contact, the test contact is connected with test plug (21), detect pen-shape metre (3) through inserting test plug (21) realize with the electrical contact of test contact.
4. The substation secondary circuit detector of claim 3, wherein: the detection meter pens (3) are multiple, each detection meter pen (3) is provided with a number display seven-segment digital tube (33), the number display seven-segment digital tubes (33) are electrically connected with the output end of the detection controller (17), and the detection controller (17) receives an instruction at the HMI man-machine interaction display screen (6) to control each number display seven-segment digital tube (33) to display the number of the corresponding node to be detected on the secondary loop.
5. The substation secondary circuit detector according to claim 4, wherein the electrical connection structure of the detection stylus (3), the detection controller (17) and the voltage detection module (9) is as follows: detect pen-shape metre (3) including gauge stick (31), gauge stick (31) front end is equipped with probe (32), gauge stick (31) tail end is equipped with cable (34), cable (34) are connected with test wire plug (16), probe (32), seven sections charactron (33) of serial number display are connected with test wire plug (16) electricity, test wire socket (12) detachably on test wire plug (16) and box body (4) lateral wall is connected, test wire socket (12) are connected with detection pen-shape metre adapter (18) electricity in box body (4), detect pen-shape metre adapter (18) and the input of voltage detection module (9), the output electricity of detection controller (17) is connected.
6. The substation secondary circuit detector of claim 4, wherein: the number display seven-segment digital tube (33) on the detection meter pen (3) adopts dynamic display control.
7. The substation secondary circuit detector of claim 1, wherein: box body (4) lateral wall be equipped with supply socket (5), supply socket (5) are connected with rectifier module (10) electricity in box body (4), rectifier module (10) provide the power for voltage detection module (9), detection controller (17) and wireless transmission module (7), rectifier module (10) output is connected with battery (11) electricity.
8. The substation secondary circuit detector of claim 7, wherein: the box body (4) is provided with a power switch (8), and the power switch (8) is electrically connected with the rectifier module (10).
9. The substation secondary circuit detector of claim 2, wherein: the wireless transmission module (7) and the wireless gateway (13) adopt an LORA wireless transmission protocol.
10. The detection method of the substation secondary circuit detector in claim 5 is characterized by comprising the following steps:
initializing a detector, inputting the voltage, the line number and the type of an electric element of a terminal node to be detected of each secondary circuit into a detection controller (17) according to the circuit structure and the electric property of the secondary circuit to be detected of a transformer substation, editing a graphical interface and parameters of an HMI (human machine interface) man-machine interaction display screen (6) and corresponding to the parameters in the detection controller (17) one by one;
when detecting the secondary loop, an operator selects a corresponding loop on an HMI (human machine interface) human-machine interaction display screen (6) according to the currently detected loop, and the detection controller (17) controls a number display seven-segment digital tube (33) on each detection pen gauge (3) to display the terminal row line number of the corresponding detection node according to the internal line number parameter after receiving the signal;
inserting a test plug (21) into a test contact of a terminal corresponding to the wire number on the wiring terminal block (2) according to the wire number of the terminal block of the node to be detected displayed on the detection meter pen (3), and then inserting probes (32) of the detection meter pen (3) into the corresponding test plugs (21) in a one-to-one correspondence manner;
step four, the voltage detection module (9) detects the voltage of each detection meter pen (3), the detection result is transmitted to the detection controller (17), the detection controller (17) compares the detection value with a preset standard value, the detection result is transmitted to the HMI human-computer interaction display screen (6) and the wireless transmission module (7), the HMI human-computer interaction display screen (6) displays the result and the parameters on the display screen according to the detection result, the nodes meeting the standard are displayed by green nodes, and the nodes exceeding the preset standard range are displayed by red nodes;
and step five, the wireless gateway (13) receives the detection result data sent by the wireless transmission module (7) at each secondary loop, and sends the data to the PC terminal (14) and the mobile terminal (15), and the detection results of all the secondary loops are summarized on the PC terminal (14) and the mobile terminal (15).
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