CN102053237A - Remote on-line detection system of electric energy metering device - Google Patents
Remote on-line detection system of electric energy metering device Download PDFInfo
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- CN102053237A CN102053237A CN2009100663723A CN200910066372A CN102053237A CN 102053237 A CN102053237 A CN 102053237A CN 2009100663723 A CN2009100663723 A CN 2009100663723A CN 200910066372 A CN200910066372 A CN 200910066372A CN 102053237 A CN102053237 A CN 102053237A
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Abstract
The invention discloses a remote on-line detection system of an electric energy metering device. The system comprises a data server, a network switch, a terminal computer and a substation device, wherein the network switch is connected with the data server; the terminal computer is connected with the network switch; the substation device comprises a multi-channel on-site standard electric energy meter, a substation industrial personal computer and a human-computer interface; the substation industrial personal computer is connected with the multi-channel on-site standard electric energy meter; the human-computer interface is connected with the substation industrial personal computer; and the substation industrial personal computer is connected with the data server through a telecommunication channel. In the on-line detection system using the technical scheme, a voltage current transformer and secondary voltage drop are detected by a data comprehensive analysis method, so various indexes of the electric energy metering device can be comprehensively and remotely detected on line, the error of the electric energy meter is checked by using the multi-channel on-site standard electric energy meter, and the accuracy of on-site check and the reliability of a secondary loop are guaranteed.
Description
Technical field
The invention belongs to the calibration of electric variable measurement instrument, relate in particular to a kind of on-line detecting system that transformer station's critical point electric power meter is carried out remote detection.
Background technology
Complete transformer station's electric power meter comprises electric energy meter, voltage transformer (VT), current transformer, secondary circuit is formed, and for the accuracy that guarantees to measure, has begun at present to adopt the measuring apparatus on-line detecting system to detect in real time, but such systemic-function is more single at present, the general main detection of carrying out electric energy meter error, and ruuning situation that can't the response voltage current transformer, thereby the metering accuracy of reaction measuring apparatus that can't be complete.
Summary of the invention
The purpose of this invention is to provide a kind of Watthour meter remote on-line detecting system, comprehensively real-time online detects every index of measuring apparatus, guarantees the accuracy of metering.
For achieving the above object, the present invention adopts following technical scheme: a kind of Watthour meter remote on-line detecting system, comprise data server, the network switch and terminal computer, the network switch links to each other with data server, and terminal computer links to each other with the network switch; Also comprise the branch station arrangement, divide station arrangement to comprise the on-the-spot standard electric energy meter of hyperchannel and substation industrial computer, man-machine interface, the substation industrial computer links to each other with the on-the-spot standard electric energy meter of hyperchannel, and man-machine interface links to each other with the substation industrial computer, and the substation industrial computer links to each other by the telecommunication passage with data server.
The on-the-spot standard electric energy meter of described hyperchannel, comprise standard electric energy meter, standard electric energy meter comprises A/D converter, digital signal processor and CPU, many group three-phase voltage signals join by relay and A/D converter, many group three-phase current signals join by relay and A/D converter, and relay is controlled by CPU.
Described standard electric energy meter comprises channel module, data acquisition module, measuring and calculating module, upper computer module, auxiliary control module, keyboard, display and power module, channel module links to each other with data acquisition module, data acquisition module links to each other with measuring and calculating module, measuring and calculating module links to each other with upper computer module, auxiliary control module respectively with upper computer module, measuring and calculating module, keyboard links to each other, power module respectively with channel module, data acquisition module, measuring and calculating module, upper computer module, auxiliary control module, display links to each other, also comprise communication interface and pulse interface, communication interface links to each other with upper computer module, the pulse interface links to each other with power module, and described channel module comprises electric current and voltage input terminal and three structure identical functions pieces.
The watchcase of the on-the-spot standard electric energy meter of described hyperchannel is the high-conductivity metal material, and the radiate heat and ventilate hole is arranged on the watchcase, and described electric energy meter comprises the stabilized voltage supply of active inversion, also comprises temperature-compensated system.
Described high-conductivity metal is copper or aluminium.
Described temperature-compensated system comprises temperature sensing element and temperature sensitive lead, also comprises compensation software.
Adopt the on-line detecting system of technique scheme, the method that adopts aggregation of data to analyze detects voltage current transformer and secondary voltage drop, comprehensively remote online detects every index of electric power meter, adopt the on-the-spot standard electric energy meter verification of hyperchannel electric energy meter error, guaranteed the accuracy of field-checking and the reliability of secondary circuit.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the circuit theory diagrams of the on-the-spot standard electric energy meter of hyperchannel.
Fig. 3 is a kind of theory diagram of standard electric energy meter.
Fig. 4 is a kind of circuit theory synoptic diagram of standard electric energy meter.
Fig. 5 is a temperature control compensated curve synoptic diagram.
Embodiment
Watthour meter remote on-line detecting system as shown in Figure 1, comprise data server 20, the network switch 21 and terminal computer 22,23,24, the network switch 21 links to each other with data server 21, and terminal computer 22,23,24 links to each other with the network switch 21; Also comprise branch station arrangement 19, divide station arrangement to comprise the on-the-spot standard electric energy meter 16 of hyperchannel and substation industrial computer 17, man-machine interface 18, substation industrial computer 17 links to each other with the on-the-spot standard electric energy meter 16 of hyperchannel, man-machine interface links to each other with the substation industrial computer, and the substation industrial computer links to each other by the telecommunication passage with data server.Man-machine interface 18 comprises mouse, keyboard, display etc.First voltage transformer (VT) 9, first current transformer 8, first electric energy meter 12 constitute the measuring apparatus of the first metering circuit 1, tertiary voltage mutual inductor 7, the 3rd current transformer 6, the 3rd electric energy meter 11 constitute the measuring apparatus of the 3rd metering circuit 3, second voltage transformer (VT) 5, second current transformer 4, second electric energy meter 10 constitute the measuring apparatus of the second metering circuit 2, circuit 2 and circuit 3 are respectively the branches of circuit 1, three's voltage is identical, and the electric current of circuit 1 is circuit 2 and circuit 3 sums.
The on-the-spot standard electric energy meter of hyperchannel as shown in Figure 2, comprise standard electric energy meter, standard electric energy meter comprises A/D converter, digital signal processor DSP and CPU, many group three-phase voltage signals join by relay and A/D converter, many group three-phase current signals join by relay and A/D converter, and relay is controlled by CPU.
As Fig. 3, a kind of standard electric energy meter shown in Figure 4, comprise channel module, data acquisition module U1, measuring and calculating module U2, upper computer module U4, auxiliary control module U3, keyboard U12, display U9 and power module U8, channel module comprises three structure identical functions piece U5, U6, U7, functional block U5, U6, U7 links to each other with electric current and voltage input terminal U15 simultaneously, each functional block receives a phase voltage current signal, functional block U5, U6, U7 also links to each other with data acquisition module U2 simultaneously, data acquisition module U2 links to each other with measuring and calculating module U1, measuring and calculating module U1 links to each other with upper computer module U4, auxiliary control module U3 respectively with upper computer module U4, measuring and calculating module U1, keyboard U12 links to each other, power module respectively with channel module, data acquisition module, measuring and calculating module, upper computer module, auxiliary control module, keyboard, display, radiating electric fan U16 links to each other, also comprise communication interface and pulse interface U12, communication interface comprises RS232 communication port U11 and USB mouth U10, RS232 communication port U11 all links to each other with upper computer module with USB mouth U10, and the pulse interface links to each other with power module.Upper computer module can be an industrial computer, also can be single-chip microcomputer.Functional block can adopt U5, U6, U7 amplifier op07, ad620, and data acquisition module U2 adopts ad7656, and auxiliary control module U3 adopts 74ls244.
Many group three-phase voltages pass through relay, select a group of access by PC control, many group three-phase currents are linked on the accessory case rear panel of many group channel standard electric energy meters, the error correction parameter of every group of passage is stored in different memory cells, the amplitude of module samples passage and phase place etc. are carried out the digitizing correction, access and accurate electric energy and the electric energy error of calculating with CPU and DSP control channel are equivalent to common tricks type families system, have the standard electric energy meter of many group analog channels.
Full scale and the correction of power factor point tolerance: inner 16 synchronous AD Sampling techniques of multichannel and the DSP data processing chip of adopting of the on-the-spot standard electric energy meter of hyperchannel, full scale error, power factor under the different voltages of each passage, the different current conditions in different memory cells, have been write down, and can in the actual measurement process, repair full scale and power factor error automatically, improved measuring accuracy greatly.
2 tunnel 16 bit A/D converters have been used in data acquisition module inside, under sampling time sequence control the voltage and current signal of 6 passages are sampled.The timing control signal of sampling is produced by the GAL chip, and controlled by DSP.Sampled digital signal synthesizes 32 bit serial signals, sends measuring and calculating module DSP to.Sampled signal between two modules and sampling control signal all transmit by photoelectrical coupler, make two modules realize electrical isolation.The power supply of two modules is also isolated.
The watchcase of electric energy meter is made by copper or aluminium, and the radiate heat and ventilate hole is arranged on the watchcase, and various modules are installed in the watchcase.There is static discharge at the verification scene, radiation field, electrical fast transient (eft), so the design of on-the-spot standard electric energy meter should guarantee not damage when interference of conduction or radiation field and static discharge are arranged, when noiseless, can recover its original performance, and can accurately work.This electric energy meter adopts non-complete sealing metal plate electromagnetic shielding method, adopts copper or aluminium high conductivity material to make sheet metal, and the scope that need are protected shields fully, makes inside and outside two scopes unaffected mutually.In the electronic devices structure design, adopt above-mentioned Shielding Design, can get reasonable shield effectiveness.
Temperature-compensated system: the request for utilization of standard electric energy meter is in allowing the temperature range of using, be not more than in relative humidity under 80% the condition, input terminal and accessory power supply terminal are to casing, input terminal is not less than 100M Ω to the insulation resistance of accessory power supply terminal, could guarantee the normal use of internal electronic component like this.In order to eliminate the influence that variation of temperature is brought to circuit, both used software records error at each temperature to carry out software compensation, use some temperature sensing elements, temperature sensitive lead to offset this influence again, has wide temperature range, the correction of full load interval curve, the program control amplification of segmentation can accurately measure the 1%Ib load point, as shown in Figure 5.
Power module: adopted the power module of voltage regulation of active inversion, the input end direct current is directly supplied with by the outside, has so just obtained the power supply of stable no clutter.Power module is made up of Switching Power Supply box and signal controlling plate, and the encased switch power supply is selected commercially available finished product for use, and its technical specification is: input voltage 220V ± 15% is output as 3 groups: 5V 8A is a primary power; + 12V 2A is the industrial computer accessory power supply; 24V 2A is the relay driving power.
The on-the-spot standard electric energy meter of this hyperchannel is the signal Processing core with DSP, adopts the digital multiplier principle to realize the fundamental measurement function; With the host computer is the control core, is aided with analog signal channel, keyboard, display, communication interface, realizes systemic-function.Measured voltage, current signal are transformed to suitable voltage signal through resitstance voltage divider, current transformer, deliver to AD converter and are transformed to digital signal, are performed mathematical calculations by digital signal processor DSP again, obtain the measurement data of various needs.These measurement data send control CPU to by communication modes.Control CPU management man-machine interface, by its response supervisory keyboard and communication port, driving display, and test data carried out post-processed.
The verification of electric energy meter: the present invention adopts the on-the-spot standard electric energy meter of hyperchannel to come the verification electric energy meter.The electric current and voltage loop pulse signal of electric energy meter 10 is received voltage channel 1 current channel 1 and the pulse passage 1 of standard electric energy meter respectively, the voltage of electric energy meter 11, electric current, pulse signal are received voltage channel 2 current channels 2 pulse passages 2 of standard electric energy meter respectively, by that analogy.Like this, the on-the-spot standard electric energy meter 16 of hyperchannel just can carry out verification to the electric energy meter that inserts each passage successively under the control of industrial computer.
The method that the present invention adopts aggregation of data to analyze detects voltage current transformer and secondary voltage drop.Save the intermediate computations link, convenient directly perceived.
The detection of voltage transformer (VT): second voltage transformer (VT) 5, tertiary voltage mutual inductor 7, the primary voltage of first voltage transformer (VT) 9 is identical, its voltage change ratio is also identical generally speaking, so its secondary voltage also must be identical or in the error range of a permission, read electric energy meter 10 respectively, 11,12 magnitude of voltage, three magnitudes of voltage compare mutually, can judge that whether working properly three voltage transformer (VT) are, be example just with three voltage transformer (VT) herein, often more than three, the quantity that is connected in parallel on the voltage transformer (VT) on the same voltage is many more in the reality, and the accuracy that detects voltage transformer (VT) with this kind way is just high more.
The detection of current transformer: the primary current of first current transformer 8 is the primary current sum of the 3rd current transformer 6 and second current transformer 4, so the secondary current of first current transformer 8 also is the secondary current sum of the 3rd current transformer 6 and second current transformer 4.Directly read the current value of electric energy meter 10,11,12, compare according to three above-mentioned relations of electric current, if error is in the measuring apparatus permissible range then the operation of all current transformers is normal, otherwise be certain current transformer operation troubles, can analyze abort situation according to other detection information such as electric energy meters again.
Pt secondary voltage drop: as shown in Figure 1, draw the voltage channel n that two long lines 13 are directly received the on-the-spot standard electric energy meter 16 of hyperchannel from 5 levels of second voltage transformer (VT), the electric current of electric energy meter 10 and pulse signal insert the current channel n and the pulse passage n of hyperchannel standard electric energy meter 16 simultaneously, current channel n and current channel 1 are connected, so the first passage of the on-the-spot standard electric energy meter of hyperchannel is identical with pulse signal with the n channel current, survey from electric energy meter during the former voltage signal and insert, latter's voltage signal is to pull line from the voltage transformer (VT) side to insert.So the error of two passages gets final product the secondary voltage drop situation of reflecting voltage mutual inductor.
Claims (6)
1. Watthour meter remote on-line detecting system, it is characterized in that: comprise data server, the network switch and terminal computer, the network switch links to each other with data server, and terminal computer links to each other with the network switch; Also comprise the branch station arrangement, divide station arrangement to comprise the on-the-spot standard electric energy meter of hyperchannel and substation industrial computer, man-machine interface, the substation industrial computer links to each other with the on-the-spot standard electric energy meter of hyperchannel, and man-machine interface links to each other with the substation industrial computer, and the substation industrial computer links to each other by the telecommunication passage with data server.
2. Watthour meter remote on-line detecting system as claimed in claim 1, it is characterized in that: the on-the-spot standard electric energy meter of described hyperchannel, comprise standard electric energy meter, standard electric energy meter comprises A/D converter, digital signal processor and CPU, many group three-phase voltage signals join by relay and A/D converter, many group three-phase current signals join by relay and A/D converter, and relay is controlled by CPU.
3. Watthour meter remote on-line detecting system as claimed in claim 2, it is characterized in that: described standard electric energy meter comprises channel module, data acquisition module, measuring and calculating module, upper computer module, auxiliary control module, keyboard, display and power module, channel module links to each other with data acquisition module, data acquisition module links to each other with measuring and calculating module, measuring and calculating module links to each other with upper computer module, auxiliary control module respectively with upper computer module, measuring and calculating module, keyboard links to each other, power module respectively with channel module, data acquisition module, measuring and calculating module, upper computer module, auxiliary control module, display links to each other, also comprise communication interface and pulse interface, communication interface links to each other with upper computer module, the pulse interface links to each other with power module, and described channel module comprises electric current and voltage input terminal and three structure identical functions pieces.
4. Watthour meter remote on-line detecting system as claimed in claim 3, it is characterized in that: the watchcase of the on-the-spot standard electric energy meter of described hyperchannel is the high-conductivity metal material, the radiate heat and ventilate hole is arranged on the watchcase, described electric energy meter comprises the stabilized voltage supply of active inversion, also comprises temperature-compensated system.
5. Watthour meter remote on-line detecting system as claimed in claim 4 is characterized in that: described high-conductivity metal is copper or aluminium.
6. Watthour meter remote on-line detecting system as claimed in claim 4 is characterized in that: described temperature-compensated system comprises temperature sensing element and temperature sensitive lead, also comprises compensation software.
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| CN2009100663723A CN102053237A (en) | 2009-10-31 | 2009-10-31 | Remote on-line detection system of electric energy metering device |
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| CN2009100663723A CN102053237A (en) | 2009-10-31 | 2009-10-31 | Remote on-line detection system of electric energy metering device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426278A (en) * | 2011-10-12 | 2012-04-25 | 雷立 | Ammeter capable of automatically identifying misalignment and failure |
| CN103454611A (en) * | 2013-08-29 | 2013-12-18 | 深圳市卓联电子有限公司 | Electric energy metering device remote calibration detection system and secondary voltage drop detection method |
| CN103513221A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Secondary voltage drop/secondary load on-line monitoring device and system and monitoring method thereof |
| CN103852744A (en) * | 2014-03-03 | 2014-06-11 | 南方电网科学研究院有限责任公司 | Distributed online monitoring system and method for electric energy metering device |
| CN104793173A (en) * | 2015-05-06 | 2015-07-22 | 郑州瑞能电气有限公司 | Electric power measurement monitoring device adopting digital bus multipoint distribution acquisition technology |
| CN105487042A (en) * | 2015-12-28 | 2016-04-13 | 云南电网有限责任公司电力科学研究院 | Electric energy metering device function detection system |
| CN105548950A (en) * | 2016-01-29 | 2016-05-04 | 国家电网公司 | Device and method of on-line detection of intelligent ammeter |
| CN106199496A (en) * | 2016-08-17 | 2016-12-07 | 国网江西省电力公司电力科学研究院 | A kind of electrical fast transient (eft) influence amount experimental provision of intelligent electric energy meter |
| CN106317984A (en) * | 2016-08-25 | 2017-01-11 | 常熟市裕华计量检测咨询服务有限公司 | Measurement and detection equipment |
| CN110108934A (en) * | 2018-02-01 | 2019-08-09 | 株洲中车时代电气股份有限公司 | A kind of multichannel voltameter scale |
| CN111650434A (en) * | 2019-12-26 | 2020-09-11 | 北京博纳电气股份有限公司 | Method for single-phase intelligent electric energy meter to measure by adopting PCB type current sensor |
| CN112147567A (en) * | 2020-09-28 | 2020-12-29 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter with self-checking function and ammeter checking method |
| CN113777548A (en) * | 2021-07-26 | 2021-12-10 | 国网浙江省电力有限公司营销服务中心 | High-voltage direct-current transformer calibration system with feedback signal obtained from standard voltage divider |
| CN115754397A (en) * | 2022-10-31 | 2023-03-07 | 云南电网有限责任公司昆明供电局 | Multifunctional testing system and method for seamlessly connecting high-precision calculation of electric quantity |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043642A (en) * | 1996-08-01 | 2000-03-28 | Siemens Power Transmission & Distribution, Inc. | Watt-hour meter with communication on diagnostic error detection |
| US6671635B1 (en) * | 2001-02-23 | 2003-12-30 | Power Measurement Ltd. | Systems for improved monitoring accuracy of intelligent electronic devices |
| CN2812024Y (en) * | 2005-03-29 | 2006-08-30 | 郑州西部电子技术有限公司 | Remote automatic detection system for electric energy metering device |
| CN201177662Y (en) * | 2008-03-14 | 2009-01-07 | 安徽省电力公司六安供电公司 | Remote on-line detection system for electric energy metering error |
| CN201177643Y (en) * | 2008-03-19 | 2009-01-07 | 长沙威胜电子有限公司 | Electrical energy meter of digital transforming plant |
| CN201247286Y (en) * | 2008-08-25 | 2009-05-27 | 浙江恒业电子有限公司 | Electronic three-phase multifunctional electric energy meter |
-
2009
- 2009-10-31 CN CN2009100663723A patent/CN102053237A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043642A (en) * | 1996-08-01 | 2000-03-28 | Siemens Power Transmission & Distribution, Inc. | Watt-hour meter with communication on diagnostic error detection |
| US6671635B1 (en) * | 2001-02-23 | 2003-12-30 | Power Measurement Ltd. | Systems for improved monitoring accuracy of intelligent electronic devices |
| CN2812024Y (en) * | 2005-03-29 | 2006-08-30 | 郑州西部电子技术有限公司 | Remote automatic detection system for electric energy metering device |
| CN201177662Y (en) * | 2008-03-14 | 2009-01-07 | 安徽省电力公司六安供电公司 | Remote on-line detection system for electric energy metering error |
| CN201177643Y (en) * | 2008-03-19 | 2009-01-07 | 长沙威胜电子有限公司 | Electrical energy meter of digital transforming plant |
| CN201247286Y (en) * | 2008-08-25 | 2009-05-27 | 浙江恒业电子有限公司 | Electronic three-phase multifunctional electric energy meter |
Non-Patent Citations (2)
| Title |
|---|
| 杨峻等: "宽量程标准电能表的检定", 《青海电力》 * |
| 陈卓娅等: "电能计量装置远程在线检测系统的设计与实现", 《电测与仪表》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426278A (en) * | 2011-10-12 | 2012-04-25 | 雷立 | Ammeter capable of automatically identifying misalignment and failure |
| CN103454611A (en) * | 2013-08-29 | 2013-12-18 | 深圳市卓联电子有限公司 | Electric energy metering device remote calibration detection system and secondary voltage drop detection method |
| CN103513221A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Secondary voltage drop/secondary load on-line monitoring device and system and monitoring method thereof |
| CN103513221B (en) * | 2013-10-14 | 2016-06-29 | 国家电网公司 | Secondary voltage drop/secondary load on-Line Monitor Device and system and monitoring method thereof |
| CN103852744A (en) * | 2014-03-03 | 2014-06-11 | 南方电网科学研究院有限责任公司 | Distributed online monitoring system and method for electric energy metering device |
| CN104793173A (en) * | 2015-05-06 | 2015-07-22 | 郑州瑞能电气有限公司 | Electric power measurement monitoring device adopting digital bus multipoint distribution acquisition technology |
| CN105487042A (en) * | 2015-12-28 | 2016-04-13 | 云南电网有限责任公司电力科学研究院 | Electric energy metering device function detection system |
| CN105548950A (en) * | 2016-01-29 | 2016-05-04 | 国家电网公司 | Device and method of on-line detection of intelligent ammeter |
| CN106199496A (en) * | 2016-08-17 | 2016-12-07 | 国网江西省电力公司电力科学研究院 | A kind of electrical fast transient (eft) influence amount experimental provision of intelligent electric energy meter |
| CN106317984A (en) * | 2016-08-25 | 2017-01-11 | 常熟市裕华计量检测咨询服务有限公司 | Measurement and detection equipment |
| CN110108934A (en) * | 2018-02-01 | 2019-08-09 | 株洲中车时代电气股份有限公司 | A kind of multichannel voltameter scale |
| CN111650434A (en) * | 2019-12-26 | 2020-09-11 | 北京博纳电气股份有限公司 | Method for single-phase intelligent electric energy meter to measure by adopting PCB type current sensor |
| CN112147567A (en) * | 2020-09-28 | 2020-12-29 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter with self-checking function and ammeter checking method |
| CN113777548A (en) * | 2021-07-26 | 2021-12-10 | 国网浙江省电力有限公司营销服务中心 | High-voltage direct-current transformer calibration system with feedback signal obtained from standard voltage divider |
| CN115754397A (en) * | 2022-10-31 | 2023-03-07 | 云南电网有限责任公司昆明供电局 | Multifunctional testing system and method for seamlessly connecting high-precision calculation of electric quantity |
| CN115754397B (en) * | 2022-10-31 | 2023-12-05 | 云南电网有限责任公司昆明供电局 | Multifunctional testing system and method for seamless connection high-precision electric quantity calculation |
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Application publication date: 20110511 |