Voltage transformer online error measurement system and method

A voltage transformer and error measurement technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve problems that affect people's normal life and production, time-consuming and labor-intensive, and transformers cannot detect power failures, etc.

Active Publication Date: 2018-01-05
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in actual testing, it is found that the transformers used in some lines cannot detect power outages, and power outage detection will affect people's normal life and production
Although power failure dete

Method used

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  • Voltage transformer online error measurement system and method
  • Voltage transformer online error measurement system and method
  • Voltage transformer online error measurement system and method

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Embodiment Construction

[0072] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0073] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention relates to a voltage transformer online error measurement system. The system comprises an off-line detection unit, an online detection unit, a correction unit, a comparison unit and a result determination unit, wherein the off-line detection unit determines factory error data according to capacitance distribution of a capacitive voltage transformer when leaving the factory, and determines handover error data according to capacitance distribution of the capacitive voltage transformer during a field handover test; the online detection unit determines online error data according toa connection mode of the capacitive voltage transformer in a substation; the correction unit performs correction on the online error data by using secondary load correction, grid frequency correctionand temperature coefficient correction to obtain corrected online error data; the compression unit determines a comparison result of the error data and benchmark data when there is an electromagneticvoltage transformer in the substation or there is no electromagnetic voltage transformer in the substation; and the result determination unit determines an actual error of the voltage transformer according to the factory error data, the handover error data, the corrected online error data and the comparison result.

Description

technical field [0001] The invention relates to the field of electric energy metering, and more specifically, to an online error measurement system and method of a voltage transformer. Background technique [0002] In recent years, due to the rapid development of my country's power industry, the voltage level of the power system has been continuously improved, and the power generation and power consumption have increased dramatically. At the same time, with the reform of the power system, especially the separation of power generation and transmission, the accuracy and fairness of electric energy measurement have aroused great concern from the society. The voltage transformer is an important part of the electric energy metering device at the gateway. In order to ensure the reliable operation of voltage transformers, according to the "Electrical Equipment Installation Engineering Handover Test Standards for Electrical Equipment", the voltage transformers need to be handed ove...

Claims

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Application Information

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IPC IPC(8): G01R35/02
Inventor 王欢项琼岳长喜汪本进余春雨朱凯
Owner CHINA ELECTRIC POWER RES INST
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