Simulation test device for operating characteristics of unconventional low-voltage power grid electric energy metering equipment
A technology of electric energy metering equipment and low-voltage power grid, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., and can solve the problems of unable to meet the complex power grid operating environment reproduction test function and so on.
Active Publication Date: 2019-07-23
STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT +2
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Problems solved by technology
However, at present, the calibration device of electric energy metering equipment in the laboratory usually sets the operation test environment and test function for the operation state of the conventional power grid, so it cannot meet the requirements of reproducing the operation environment of the complex power grid and realizing various test functions in this environment
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0028] The operating characteristic simulation test device of the unconventional low-voltage power grid electric energy metering equipment of the present invention, its embodiment is as follows figure 1 As shown, it includes A phase voltage power amplifier 1, B phase voltage power amplifier 2, C phase voltage power amplifier 3, A phase current power amplifier 4, B phase current power amplifier 5, C phase current power amplifier 6, range switching mechanism 7. Four-spot test unit 14 , multifunctional standard electric energy meter 19 , error calculator 20 , simulation test control platform 21 and program-controlled signal source 29 .
[0029] The range switching mechanism 7 includes an A-phase voltage range switching unit 8, a B-phase voltage range switching unit 9, a C-phase voltage range switching unit 10, an A-phase current range switching un...
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The present invention discloses an unconventional low-voltage power grid electric energy metering device operation characteristic simulation testing device. Each phase voltage power amplifier and each current power amplifier are employed to receive small voltage signals output by a program controlled signal source and expressing each phase test voltage waveform and each phase test current waveform and perform amplification of the corresponding voltage, the corresponding current and the power; and a range switching mechanism performs range regulation and output of the output voltage or current signals of each phase voltage power amplifier and each phase current power amplifier. The unconventional low-voltage power grid electric energy metering device operation characteristic simulation testing device employs three modes of waveform customizing, field wave recording input and power grid modeling to generate test voltage and test current waveforms and construct the operation simulation environment of an unconventional low-voltage power grid. The demands of the metering characteristic verification of a conventional electric energy metering device under various voltage and current waveform conditions are greatly satisfied.
Description
technical field [0001] The invention belongs to the technical field of electric energy metering equipment testing, and in particular relates to an operating characteristic simulation test device for unconventional low-voltage power grid electric energy metering equipment. Background technique [0002] The use of a large number of power electronic nonlinear loads and the access of distributed new energy sources make the operating state of the modern low-voltage power grid very different from that of the traditional conventional power grid. The problem of measurement accuracy has become the focus of great attention of power supply enterprises and users in the society. However, at present, the calibration device of laboratory electric energy metering equipment usually sets the operation test environment and test functions for the operation state of the conventional power grid, so it cannot meet the requirements of reproducing the operation environment of the complex power grid ...
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IPC IPC(8): G01R35/04G01R35/00G05B17/02
CPCG01R35/005G01R35/04G05B17/02
Inventor 胡瑛俊沈建良韩霄汉姚力徐韬章江铭陆锋杰
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT