CN103018552A - Three-phase digital type intelligent electricity meter - Google Patents
Three-phase digital type intelligent electricity meter Download PDFInfo
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- CN103018552A CN103018552A CN2012105422195A CN201210542219A CN103018552A CN 103018552 A CN103018552 A CN 103018552A CN 2012105422195 A CN2012105422195 A CN 2012105422195A CN 201210542219 A CN201210542219 A CN 201210542219A CN 103018552 A CN103018552 A CN 103018552A
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Abstract
The invention provides a three-phase digital type intelligent electricity meter. The three-phase digital type intelligent electricity meter comprises an input/output module, a minimum system module, a human-computer interface module and a communication module, wherein the input/output module, the human-computer interface module and the communication module are connected with the minimum system module, the minimum system module comprises a power module, a reset unit, a microprocessor and a storage unit, the power module is provided with a lightning protection circuit and a switching power supply, external alternating current passes through the lightning protection circuit and the switching power supply to produce two channels of isolated 5V direct current voltage, one channel is used for supplying electricity to the communication module, and the other channel is used for supplying electricity to the input/output module, the microprocessor, the storage unit and the human-computer interface module. The three-phase digital type intelligent electricity meter is safe, reliable, good in operation state, high in compatibility and capable of conducting real-time monitoring on power supply networks and meeting the requirements of intelligent grids.
Description
Technical field
The present invention relates to Smart Home, intelligent electric meter and intelligent grid field, relate in particular to a kind of three-phase digital intelligent electric meter.
Background technology
At present, along with the national economy rapid growth, intelligent grid is put into the strategic decision of future development.Intelligent electric meter is one of important step of power department optimization management of power use process as the important component part of intelligent grid, also is the key that realizes data interactive, accurate-metering and intelligent scheduling.Intelligence instrument should have following functions in the intelligent grid: more pay attention to information processing, interaction, metering and communicate by letter, and corresponding with load with the detail record of realizing customer charge information.Yet existing intelligent electric meter obviously can't satisfy this requirement.
All trades and professions, especially commercial power is extensive, power consumption is large, power consumption is many, the requirement power supply safety is reliable, can satisfy the user to the requirement of electric power networks Real Time Monitoring, and according to the result who monitors, effectively control, improve the safe reliability of power supply, help the user to improve power consumption efficiency, the requirements such as energy savings, reduction cost.Therefore, design a kind of safe and reliable, running status is good, compatible strong, can carry out Real Time Monitoring to supply network, comprise that full electric measurement, the quality of power supply, power down are not lost, the Novel intelligent electric meter of the functions such as logout, communication, digital quantity input and output and analog input and output seems more urgent and have great importance.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of safe and reliablely, running status is good, compatible strong, can carry out Real Time Monitoring to supply network, pay attention to information processing, interaction, metering and the three-phase digital intelligent electric meter of communicating by letter, to satisfy the requirement of intelligent grid.
The invention provides a kind of three-phase digital intelligent electric meter, comprise input/output module, minimum systematic module, human-computer interface module and communication module; Described input/output module, human-computer interface module and communication module are connected with described minimum systematic module respectively; Described minimum systematic module comprises power module, reset unit, microprocessor and storage unit; Described power module is provided with lightning protection circuit and Switching Power Supply, the external communication electricity produces the 5V DC voltage of two-way isolation after described lightning protection circuit and Switching Power Supply, one the tunnel is described communication module power supply, and another road is input/output module, microprocessor, storage unit and human-computer interface module power supply.
As a further improvement on the present invention, described input/output module comprises digital quantity input module, digital output module, analog input module and analog output module; Described digital quantity input module comprises photoelectric coupling circuit, filtering de-twitter circuit, lightning protection buffer circuit, for detection of the on off state of power equipment; Described digital output module comprises buffer circuit and driving circuit, is used for being connected with the repeat circuit of electric power networks, and the real-time guard electric power networks; Described analog input module comprises voltage/current mutual inductor, filtering circuit, gain circuitry, A/D sample circuit, according to sampled digital signal, calculates the status information of electric power networks; Described analog output module comprises magnetic buffer circuit, drive amplification circuit, signal processing circuit, is used for output 4--20mA electric current or 0--5V voltage, realizes transmitter functions.
As a further improvement on the present invention, described power module also is provided with DC/DC converter and low pressure difference linear voltage regulator; It is the two-way DC voltage of 24V and 3.3V that described another road 5V DC voltage produces magnitude of voltage through DC/DC converter, low pressure difference linear voltage regulator respectively; The DC voltage of described 24V is described digital quantity input module power supply, and described 3.3V DC voltage is described microprocessor, storage unit, analog input module and human-computer interface module power supply
As a further improvement on the present invention, described communication module is the RS485 communication module of employing standard Modbus-RTU communication protocol.
As a further improvement on the present invention, described storage unit comprises EEPROM (Electrically Erasable Programmable Read Only Memo) and ferroelectric memory; Described ferroelectric memory is used for parameters and the calibration parameter of storage three-phase digital intelligent electric meter.
As a further improvement on the present invention, described human-computer interface module comprise real-time demonstration electric power networks status information lcd screen, check and arrange the push-button unit of three-phase digital intelligent electric meter operational factor, and show in real time the LED electric current rod of electric power networks size of current.
As a further improvement on the present invention, described lcd screen shows parameter setting, the quality of power supply, measurement inquiry, parameter query, device maintenance and the logout of electric power networks in real time, and shown menu is taked the tree design.
As a further improvement on the present invention, described push-button unit comprises left and right directions key, up and down arrow keys, setting key and four buttons of return key.
As a further improvement on the present invention, described LED electric current rod comprises a plurality of LED lamps that are arranged in order, and the real-time current of equipment under test directly determines bright light quantity:
When the real-time current of equipment under test greater than zero and when being less than or equal to the rated current of equipment under test, bright light quantity is y=[x1*I/In];
When the real-time current of equipment under test greater than the rated current of equipment under test and when being less than or equal to the rated current of 1.2 times of equipment under tests, bright light quantity is y=[x1+ (x2*I/ (1.2*In))];
When the real-time current of equipment under test during greater than the rated current of 1.2 times of equipment under tests, bright light quantity is y=x1+x2+x3;
Wherein, y is the quantity of bright light, and x1 is the quantity of the first color LED lamp, and x2 is the quantity of the second color LED lamp, and x3 is the quantity of color LED lamp in the 3rd, and I is the real-time current of equipment under test, and In is the rated current of equipment under test.
As a further improvement on the present invention, described minimum systematic module also is provided with reserve battery, described reserve battery is connected with described communication module, DC/DC converter and low pressure difference linear voltage regulator respectively, and described reserve battery is this three-phase digital intelligent electric meter power supply when the power down of external communication electricity.
The invention has the beneficial effects as follows: three-phase digital intelligent electric meter provided by the invention is more safe and reliable, running status is good, compatible strong, can carry out Real Time Monitoring to supply network, comprise that full electric measurement, the quality of power supply, power down are not lost, the function such as logout, communication, digital quantity input and output and analog input and output, and can be according to the result of monitoring, effectively control, improve the safe reliability of power supply, help the user to improve power consumption efficiency, energy savings, reduction cost can satisfy the requirement of intelligent grid.
Description of drawings
Fig. 1 is the hardware capability module map of three-phase digital intelligent electric meter in the embodiment of the invention;
Fig. 2 is the hardware block diagram of three-phase digital intelligent electric meter in the embodiment of the invention;
Fig. 3 is the power supply architecture block diagram of three-phase digital intelligent electric meter in the embodiment of the invention;
Fig. 4 is digital quantity input module structured flowchart in the embodiment of the invention;
Fig. 5 is digital output modular structure block diagram in the embodiment of the invention;
Fig. 6 is analog input modular structure block diagram in the embodiment of the invention;
Fig. 7 is analog output module structured flowchart in the embodiment of the invention;
Fig. 8 is the structured flowchart of human-computer interface module in the embodiment of the invention;
Fig. 9 is the tree menu structural drawing that lcd screen shows in the embodiment of the invention;
Figure 10 is the structural drawing of push-button unit in the embodiment of the invention;
Figure 11 is the master menu that lcd screen shows in the embodiment of the invention;
Figure 12 is that the button that lcd screen shows in the embodiment of the invention switches demonstration information;
Figure 13 is the constitutional diagram of LED electric current rod in the embodiment of the invention;
Figure 14 is three-phase digital intelligent electric meter and other ammeter comparison diagram in the embodiment of the invention.
Identify among the figure: the 1-input/output module; 11-digital quantity input module (DI); The 111-photoelectric coupling circuit; 112-filtering de-twitter circuit; 113-lightning protection buffer circuit; 12-digital output module (DO); The 121-buffer circuit; The 122-driving circuit; 13-analog input module (AI); 131-voltage/current mutual inductor; The 132-filtering circuit; The 133-gain circuitry; 134-A/D sample circuit; 14-analog output module (AO); The 141-buffer circuit; 142-drive amplification circuit; The 143-signal processing circuit; The 2-minimum systematic module; The 21-power module; The 211-lightning protection circuit; The 212-Switching Power Supply; The 213-DC/DC converter; 214-low pressure difference linear voltage regulator (LDO); The 22-reset unit; 23-microprocessor (CORTEX-M3); The 24-storage unit; The 25-reserve battery; The 3-human-computer interface module; The 31-LCD screen; The 32-push-button unit; 321-left and right directions key; The 322-up and down arrow keys; The 323-setting key; The 324-return key; 33-LED electric current rod; The 4-communication module.
Embodiment
The present invention is further described below in conjunction with description of drawings and embodiment.
Such as Fig. 1, Fig. 2, shown in Figure 3, a kind of three-phase digital intelligent electric meter comprises input/output module 1, minimum systematic module 2, human-computer interface module 3 and communication module 4; Described input/output module 1, human-computer interface module 3 and communication module 4 are connected with described minimum systematic module 1 respectively; Described minimum systematic module 2 comprises power module 21, reset unit 22, microprocessor (CORTEX-M3) 23 and storage unit 24; Described input/output module 1 comprises digital quantity input module (DI) 11, digital output module (DO) 12, analog input module (AI) 13 and analog output module (AO) 14; Described human-computer interface module 3 comprise real-time demonstration electric power networks status information lcd screen 31, check and arrange the push-button unit 32 of three-phase digital intelligent electric meter operational factor, and show in real time the LED electric current rod 33 of electric power networks size of current.
Operating voltage (the V of STM32
DD) be 2.0--3.6V, this intelligent electric meter microprocessor (CORTEX-M3) 23 adopts the 3.3V DC power supply.Power quality is playing vital effect aspect the safety of data communication and the quality, in case tie line that the fault because of electric system causes and the damage of communication apparatus occur, electric power netting safe running is caused great harm.Therefore, power module 21 of the present invention is provided with lightning protection circuit 211 and Switching Power Supply 212, outside 220V or 110V alternating current produce the 5V DC voltage of two-way isolation after described lightning protection circuit 211 and Switching Power Supply 212, one the tunnel is described communication module 4 power supplies, another road 5V power supply produces er two-way DC voltage through DC/DC converter 213, low pressure difference linear voltage regulator (LDO) 214 respectively, is respectively 24V and 3.3V; 3.3V DC voltage is analog input module (AI) 11, microprocessor 23, memory cell 24, lcd screen 31, LED electric current rod 33 and push-button unit 32 power supplies; The 24V DC voltage is digital quantity input module (DI) 11 power supplies.Three-phase digital intelligent electric meter of the present invention also is provided with reserve battery 25 simultaneously, and described reserve battery 25 is connected with described communication module 4, DC/DC converter 213 and low pressure difference linear voltage regulator 214 respectively; As primary power V
DDDuring power down, by reserve battery 25(V
BAT) for real-time clock (RTC) and back-up registers provide power supply, to guarantee in electrical network badly damaged situation, continuing communication.This not only makes electrical network more safe and reliable, and reduces maintenance cost and staff's workload.
Such as Fig. 2, Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, described input/output module 1 comprises digital quantity input module 11, digital output module 12, analog input module 13 and analog output module 14; Described digital quantity input module 11 comprises photoelectric coupling circuit 111, filtering de-twitter circuit 112, lightning protection buffer circuit (TVS pipe) 113, for detection of the on off state of power equipment; Described digital output module 12 comprises buffer circuit 121 and driving circuit 122, is used for being connected with the repeat circuit of electric power networks, and the real-time guard electric power networks; Described analog input module 13 comprises voltage/current mutual inductor 131, filtering circuit 132, gain circuitry 133, A/D sample circuit 134, according to sampled digital signal, calculates the status information of electric power networks; Described analog output module 14 comprises buffer circuit 141, drive amplification circuit 142, signal processing circuit 143, is used for output 4--20mA electric current or 0--5V voltage, realizes transmitter functions.
In the middle of the course of work, the digital quantity input signal detects the on off state of power equipment by lightning protection buffer circuit (TVS pipe) 113, photoelectric coupling circuit 111 and filtering de-twitter circuit 112; The digital output signal links to each other with the electric power networks repeat circuit through buffer circuit 121 and driving circuit 122, and electric power networks is carried out real-time guard; Analog input comprises the voltage and current signal, respectively through voltage/current mutual inductor 131, filtering circuit 132, gain circuitry 133, A/D sample circuit 134, according to sampled digital signal, adopts software to calculate, and draws the status information of electric power networks; Analog quantity output signals adopts PWM(pulse-length modulation) technology, through magnetic buffer circuit 141, drive amplification circuit 142, signal processing circuit 143, output 4--20mA electric current or 0--5V voltage, realize transmitter functions, the user can be configured according to the actual requirements, draws the status information of electric power networks.
As shown in Figure 2, described communication module 4 adopts the RS485 communication module, realize that microprocessor 23 and other hardware modules, equipment and system carry out exchanges data, and the Modbus-RTU communication protocol of the standard of employing realization equipment is communicated by letter with the networking of system with system, system with equipment, equipment.Good compatibility is easy to networking, can realize the reliable communicating of multinode, long distance, convenient access intelligent distribution system, realize the function of remote measurement, remote signalling, remote control, remote regulating " four is distant ", host computer can a distant place reads the measurement data of each intelligent electric meter Nodes, revise parameter, Long-distance Control realizes the purpose that the consumer Centralized Monitoring is effectively managed.Can also utilize the Modbus-RTU communications protocol to realize realizing by communication interface in the charged situation function of online upgrading, in the situation of the operation power that do not destory the scene, carry out maintenance upgrade, more economical safer.
In three-phase digital intelligent electric meter of the present invention, user's button reset function when reset unit 22 is mainly used in the operation of completion system power-up initializing and system, the reset mode of Cortex-M3 kernel comprise system reset, power on/power-off reset and backup zone reset three kinds.
System reset will reset reseting mark in clock-control register (CSR) and all registers the register of backup in the zone.Low level (external reset), window house dog counting termination (WWDG resets), independent house dog counting termination (IWDG resets), software reset's (SW resets) and low-power consumption management on the NRST pin (asynchronous multiple pin) reset and can produce system reset, confirm reset source by checking the reset mode zone bit.
Powering on/power-off reset (POR/PDR resets) and returning from standby mode to produce power reset, and reset source finally acts on reseting pin, and keeps low level in reseting procedure.
The backup zone has two special resetting, and they are impact backup zone only.The backup zone resets and can produce by the backup area domain controller is set, and also can be powered on by working power and reserve battery and cause the backup zone and reset.
In three-phase digital intelligent electric meter of the present invention, described storage unit 24 comprises EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM) and ferroelectric memory (FRAM); Described ferroelectric memory is used for parameters and the calibration parameter of storage three-phase digital intelligent electric meter, and these parameters are carried out the two-region of primary area and backup area and preserved; Simultaneously storage unit 24 has realized the fault self-checking function at software, in service the two-region data is carried out verification and verification, and whether decision data is correct, lose or destroyed such as data, then point out mistake, import default parameters and recover initial setting up, greatly improved the intelligent electric meter reliability of operation.
Such as Fig. 2, Fig. 8, shown in Figure 9, described human-computer interface module 3 comprise real-time demonstration electric power networks status information lcd screen 31, check and arrange the push-button unit 32 of three-phase digital intelligent electric meter operational factor, and show in real time the LED electric current rod 33 of electric power networks size of current.Described human-computer interface module 3 is taked modular method for designing, and lcd screen 31, LED electric current rod 33, push-button unit 32 all are modular structures independently, and the change of module itself does not affect other modules.
Described lcd screen 31 shows parameter setting, the quality of power supply, measurement inquiry, parameter query, device maintenance and the logout of electric power networks in real time; Wherein conventional electric parameter comprises three-phase current and neutral current Ia, Ib, Ic, In, phase voltage and line voltage U a, Ub, Uc, Un, Uab, Ubc, Uca, frequency F, power factor PFa, PFb, PFc, PF, active power and reactive power Pa, Pb, Pc, P, Qa, Qb, Qc, Q, applied power Sa, Sb, Sc, S, active electrical degree Wp, idle electric degree Wq; Logout comprise power down, disconnected phase, decompression, cutout, electric current and voltage asymmetric/imbalance, overvoltage, owe the status informations such as phase, mains by harmonics.
The menu that described lcd screen 31 shows is taked the tree design, not only adapts to different system requirements, and the page itself also is independently individual, not mutually coupling, in addition, font and the size of lcd screen 31 type matrixes can be selected, and support Chinese and English subtitles one key to switch.And adopt hierarchical approaches between menu and the menu, and a plurality of submenus can be arranged below the menu, the afterbody menu also can be referred to as the page, and the user shows or parameters.Menu and the page be correspondence function independently all, the respectively corresponding function of each menu or the page, and this meets OO method for designing.The page of identical function may use identical template, such as confirming the page, checking the page etc., the inherited characteristics of the characteristic conforms Object-Oriented Design of this template.
In addition, queue structure's management is adopted in the management of tree menu, and one-level menu, second-level menu, three-stage menu and the current set of menu or the page of current location preserved in formation.If return the parent menu, queue length reduces; If enter submenu, the menu that then will enter or the page add the formation end to.
As shown in figure 10, described push-button unit 32 comprises left and right directions key 321, up and down arrow keys 322, setting key 323 and 324 4 buttons of return key, and button is taked to disappear and trembled mode of operation, supports long by operation.Push-button unit triggering button enters parameter pattern is set, and carries out checking and arranging of operational factor by button, and its function declaration is as follows:
Left and right directions key 321, expression page turning, or cursor move left and right;
Up and down arrow keys 322, the expression cursor up down moves, or revises numeral when adjusting;
Setting key 323 can enter master menu, or each submenu, uses when revising parameter or confirming modification, or withdraws from backlight mode;
Return key 324 can return higher level's page or cancellation is revised.
Measuring the interface, pressing setting key 323 can switching display content, but presses return key 324 return measurement interfaces, and master menu shows as shown in figure 11.Press left and right directions key 321 or up and down arrow keys 322 and cursor can be moved to corresponding submenu, can enter submenu by setting key 323, pressing left and right directions key 321 can switching display content, as shown in figure 12.
As shown in figure 13, described LED electric current rod 33 is used for showing in real time the size of electric power networks electric current, comprises 13 green lights, 4 amber lights and 3 red lights; When the real-time current of equipment under test greater than zero and when being less than or equal to the rated current of equipment under test, LED electric current rod 33 gives a green light; When the real-time current of equipment under test greater than the rated current of equipment under test and when being less than or equal to the rated current of 1.2 times of equipment under tests, LED electric current rod 33 gives a green light and the lamp of two kinds of colors of amber light; When the real-time current of equipment under test during greater than the rated current of 1.2 times of equipment under tests, the lamp of LED electric current rod 33 green, yellow, red three kinds of colors is entirely bright; The quantity of bright light is determined by following formula:
y=0,?I=0;
Y=[13*I/In] (rounding), 0＜I＜=In;
Y=[13+ (4*I/ (1.2*In))] (rounding), In＜I＜=1.2*In;
y=20,?I>1.2*In;
Wherein, y is the quantity of bright light, and I is the real-time current of equipment under test, and In is the rated current of equipment under test.
During measurement, the quantity of bright light and color can demonstrate the size of electric current in real time, and be intuitive and reliable, and accuracy class is high.Certainly, the color of lamp also can adopt other color, and the quantity of lamp also can adjust as required again.
The process type programmed method is generally adopted in the liquid crystal interface design of present intelligent electric meter, can not effectively distinguish between the page and the page, the code transplantability is poor, and extendability and compatibility all are difficult to meet the demands, what's new often needs very large workload, and often introduces new problem.
Three-phase digital intelligent electric meter of the present invention adopts the thought of hierarchical design and Object-Oriented Design aspect software systems, calling between the module adopted unidirectional method of calling, does not have that module is two-way to be called, and reduces the coupling between the module.OO method for designing is with the actual composition and classification of module according to hardware, and same object provides the interface of standard, increases portability and the inheritability of software.Wherein, three-phase digital intelligent electric meter liquid crystal interface of the present invention adopts embedded lattice lcd tree menu design, uses for reference OO design philosophy, and modularization and maintainability have very large raising, the efficient of the embedded demonstration that effectively improves.Modularization, standardization and the Standardized Design of three-phase digital intelligent electric meter software systems of the present invention reduce redundant code, improve the maintainability of software systems.
As shown in figure 14, than existing other ammeters, three-phase digital intelligent electric meter of the present invention is not only more safe and reliable, and running status is good, and is compatible strong, can carry out Real Time Monitoring to supply network, also possesses following advantage:
Metering method: adopt A/D sampling and software algorithm, by adopting OO design philosophy, make things convenient for Function Extension;
Structure: the software modularity design, hardware plug-in structure, expansion is flexible;
Electric current shows: LED electric current rod shows size of current in real time, and accuracy class is high, and is intuitive and reliable;
Host-host protocol: unified host-host protocol (Modbus--RTU), the networked communication of realization equipment and equipment, equipment and system, system and system;
Liquid crystal display: support Chinese and English subtitles one key to switch, the storage of type matrix double copies, reliability is very high.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a three-phase digital intelligent electric meter is characterized in that: comprise input/output module, minimum systematic module, human-computer interface module and communication module; Described input/output module, human-computer interface module and communication module are connected with described minimum systematic module respectively; Described minimum systematic module comprises power module, reset unit, microprocessor and storage unit; Described power module is provided with lightning protection circuit and Switching Power Supply, the external communication electricity produces the 5V DC voltage of two-way isolation after described lightning protection circuit and Switching Power Supply, one the tunnel is described communication module power supply, and another road is input/output module, microprocessor, storage unit and human-computer interface module power supply.
2. three-phase digital intelligent electric meter according to claim 1, it is characterized in that: described input/output module comprises digital quantity input module, digital output module, analog input module and analog output module; Described digital quantity input module comprises photoelectric coupling circuit, filtering de-twitter circuit, lightning protection buffer circuit, for detection of the on off state of power equipment; Described digital output module comprises buffer circuit and driving circuit, is used for being connected with the repeat circuit of electric power networks, and the real-time guard electric power networks; Described analog input module comprises voltage/current mutual inductor, filtering circuit, gain circuitry, A/D sample circuit, according to sampled digital signal, calculates the status information of electric power networks; Described analog output module comprises magnetic buffer circuit, drive amplification circuit, signal processing circuit, is used for output 4--20mA electric current or 0--5V voltage, realizes transmitter functions.
3. three-phase digital intelligent electric meter according to claim 2, it is characterized in that: described power module also is provided with DC/DC converter and low pressure difference linear voltage regulator; It is the two-way DC voltage of 24V and 3.3V that described another road 5V DC voltage produces magnitude of voltage through DC/DC converter, low pressure difference linear voltage regulator respectively; The DC voltage of described 24V is described digital quantity input module power supply, and described 3.3V DC voltage is described microprocessor, storage unit, analog input module and human-computer interface module power supply.
4. three-phase digital intelligent electric meter according to claim 3, it is characterized in that: described communication module is the RS485 communication module of employing standard Modbus-RTU communication protocol.
5. three-phase digital intelligent electric meter according to claim 4, it is characterized in that: described storage unit comprises EEPROM (Electrically Erasable Programmable Read Only Memo) and ferroelectric memory; Described ferroelectric memory is used for parameters and the calibration parameter of storage three-phase digital intelligent electric meter.
6. the described three-phase digital intelligent electric meter of arbitrary claim in 5 according to claim 1, it is characterized in that: described human-computer interface module comprise real-time demonstration electric power networks status information lcd screen, check and arrange the push-button unit of three-phase digital intelligent electric meter operational factor, and show in real time the LED electric current rod of electric power networks size of current.
7. three-phase digital intelligent electric meter according to claim 6, it is characterized in that: described lcd screen shows parameter setting, the quality of power supply, measurement inquiry, parameter query, device maintenance and the logout of electric power networks in real time, and shown menu is taked the tree design.
8. three-phase digital intelligent electric meter according to claim 6, it is characterized in that: described push-button unit comprises left and right directions key, up and down arrow keys, setting key and four buttons of return key.
9. three-phase digital intelligent electric meter according to claim 6, it is characterized in that: described LED electric current rod comprises a plurality of LED lamps that are arranged in order, and the real-time current of equipment under test directly determines bright light quantity:
When the real-time current of equipment under test greater than zero and when being less than or equal to the rated current of equipment under test, bright light quantity is y=[x1*I/In];
When the real-time current of equipment under test greater than the rated current of equipment under test and when being less than or equal to the rated current of 1.2 times of equipment under tests, bright light quantity is y=[x1+ (x2*I/ (1.2*In))];
When the real-time current of equipment under test during greater than the rated current of 1.2 times of equipment under tests, bright light quantity is y=x1+x2+x3;
Wherein, y is the quantity of bright light, and x1 is the quantity of the first color LED lamp, and x2 is the quantity of the second color LED lamp, and x3 is the quantity of color LED lamp in the 3rd, and I is the real-time current of equipment under test, and In is the rated current of equipment under test.
10. the described three-phase digital intelligent electric meter of arbitrary claim in 5 according to claim 1, it is characterized in that: described minimum systematic module also is provided with reserve battery, described reserve battery is connected with described communication module, DC/DC converter and low pressure difference linear voltage regulator respectively, and described reserve battery is this three-phase digital intelligent electric meter power supply when the power down of external communication electricity.
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| CN105954574A (en) * | 2016-07-22 | 2016-09-21 | 安徽亚辉电气自动化有限公司 | Measurement and control system for switch cabinet zero-sequence current |
| CN106199275A (en) * | 2016-07-22 | 2016-12-07 | 安徽亚辉电气自动化有限公司 | A kind of device for power quality analysis |
| CN106226622A (en) * | 2016-07-22 | 2016-12-14 | 安徽亚辉电气自动化有限公司 | A kind of monitoring system for three phase combined over-voltage protector |
| CN106249102A (en) * | 2016-07-22 | 2016-12-21 | 安徽亚辉电气自动化有限公司 | A kind of Small Electric Current Earthing And Routing Device for medium voltage distribution network |
| CN106249039A (en) * | 2016-07-22 | 2016-12-21 | 安徽亚辉电气自动化有限公司 | A kind of on-line overvoltage monitor for power distribution network |
| CN106226690A (en) * | 2016-08-01 | 2016-12-14 | 江苏瑞峰自动化***有限公司 | A kind of breaker of plastic casing automated detection system |
| CN106226690B (en) * | 2016-08-01 | 2019-04-02 | 江苏瑞峰自动化***有限公司 | A kind of breaker of plastic casing automated detection system |
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