Three-phase four-wire multifunctional electric energy meter wiring determination method

A three-phase four-wire, electric energy meter technology, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve the problems of inconvenient carrying, poor ergonomics, and high operating risks, so as to reduce the safety risks of on-site operations and save energy. Manpower and material resources, the effect of clear logic

Active Publication Date: 2017-11-07
XISHUANGBANNA POWER SUPPLY BUREAU OF YUNNAN POWER GRID CO LTD
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Problems solved by technology

In the traditional way, it is necessary to arrive at the site, open the seal of the electric energy meter, open the cover of the terminal of the electric energy meter to take voltage and current wiring sampling, and directly contact the live equipment. In addition, some electric energy meters are restricted by the installation environment, and the operation risk is high. takes about 20 to 30 minutes
At the same time, the traditional inspection equipment has the characteristics of large volume, inconvenient to carry, and poor ergonomics

Method used

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  • Three-phase four-wire multifunctional electric energy meter wiring determination method

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[0036] Step 1. According to the actual measurement of a multifunctional three-phase four-wire electric energy meter, the three-phase voltage value is normal, the three-phase current value is normal, and the phase angles of the voltage and current of the first, second and third components are Meter voltage positive phase sequence, current positive phase sequence.

[0037] Step 2. Taking the voltage of the first element as a reference, calculate the unified reference current phase angle of the first, second, and third elements Because it is greater than 360, so

[0038] Step 3, judging whether the current phase angle conforms to the correct wiring characteristics of the three-phase four-wire electric energy meter. Reference phase angle Calculate the minimum angle difference between any two angles. If the minuend is smaller than the subtrahend, add 360 degrees to the difference, and perform the first group of angle differences: (minimum angular difference), The sec...

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Abstract

A three-phase four-wire multifunctional electric energy meter wiring determination method of the present invention is mainly characterized by obtaining the real-time voltage, the current, the voltage phase sequence, the current phase sequence and the component voltage and current phase angle operation data of a three-phase four-wire multifunctional electric energy meter, determining the current phase sequence and using a voltage phase sequence and current phase sequence corresponding method to determine the wiring of the three-phase four-wire electric energy meter. According to the present invention, by applying the electric energy meter operation data directly, the wiring of the three-phase four-wire electric energy meter is determined without needing an external detection device, and by correcting and resetting a current phase, the wiring of the electric energy meter is determined, thereby providing an intelligent diagnosis method for the remote or indirect contact wiring determination of the electric energy meter.

Description

technical field [0001] The invention discloses a three-phase four-wire multifunctional electric energy meter wiring judging method, which belongs to the technical fields of marketing measurement automation and informationization of power supply enterprises. Background technique [0002] At present, the most important method for judging the wiring of a three-phase four-wire multi-functional electric energy meter is to measure the voltage and current phasor diagram of each component by using an electric energy meter on-site inspection instrument, a phase voltammeter, etc. Human wiring judgment. In the traditional way, it is necessary to arrive at the site, open the seal of the electric energy meter, open the cover of the terminal of the electric energy meter to take voltage and current wiring sampling, and directly contact the live equipment. In addition, some electric energy meters are restricted by the installation environment, and the operation risk is high. It takes about...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 代盛国田梅陈鹏陈国毅
Owner XISHUANGBANNA POWER SUPPLY BUREAU OF YUNNAN POWER GRID CO LTD
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