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Electric energy meter phase identification method

A technology for phase identification and electric energy meter, which is applied in the direction of measuring electric variables, phase sequence/synchronous indication, measuring devices, etc., can solve the problems of inaccurate color distinction, heavy workload, etc., solve the problem of input errors, reduce workload, The effect of solving the error problem of line loss statistics

Inactive Publication Date: 2017-10-20
NINGBO JIANAN ELECTRONICS
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AI Technical Summary

Problems solved by technology

[0004] At present, the user's phase identification is based on the color distinction of the wires or the measurement with special tools after arriving at the site. The color distinction is very inaccurate due to irregular wiring, and the measurement with special tools needs to be connected to the transformer side and the user's meter side with measurement tools. very heavy workload

Method used

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Embodiment Construction

[0008] The present invention will be further described in detail below in combination with specific embodiments.

[0009] The transformer station area in the distribution network is equipped with a general meter, and the three phases A, B, and C of the transformer station area general meter are determined and can be used as a reference.

[0010] In the smart meter, there is a real-time clock chip with temperature compensation function, and its daily time error is less than 0.5 seconds. In addition, the power consumption information collection system has a remote time synchronization function, which ensures that the clocks of the electric energy meters in the entire system are basically consistent, so , the voltage value of the general meter of the transformer station area and the electric energy meters of each user at the same time will not be affected by the time deviation.

[0011] By setting the real-time freezing parameters of the electric energy meter, the electric energy...

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Abstract

Provided is an electric energy meter phase identification method. The phases A, B and C of a general meter in a transformer area are used as reference. Correlation operation is carried out on the voltage values of a user electric energy meter at a plurality of moments and the voltage values of all phases of the general meter in the transformer area at the same moments. The phase is determined according to the highest correlation. As the phase can be identified accurately by measuring the voltage of an intelligent electric energy meter, there is no need for special tools to carry out identification on site, and the workload is reduced.

Description

technical field [0001] The invention relates to a phase identification method of an electric energy meter, which belongs to the application field of electric parameter measurement of a distribution network. Background technique [0002] In the management of the distribution network of the power company, many problems related to the phase of the user's electric energy meter will be involved, such as the three-phase unbalance adjustment of the transformer station area. When the phase is not known, it is not known which users to choose to adjust. For example, when conducting line loss analysis, it is found that a certain phase line loss is too large, there is a hidden danger of line aging or power theft, but because the user does not know Phase, but cannot narrow down the scope of investigation, the workload is very heavy. [0003] Our country has now basically realized the full coverage of smart energy meters, and the electricity consumption information collection system has ...

Claims

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Application Information

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IPC IPC(8): G01R35/04G01R29/18
CPCG01R35/04G01R29/18
Inventor 龙翔林章恩友马益平蒋卫平章川刘秀峰姚晓峰张军强
Owner NINGBO JIANAN ELECTRONICS
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