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Method for evaluating risks of MOV (metal oxide varistor) of series capacitive compensator

A series capacitor compensation and risk assessment technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc.

Active Publication Date: 2015-01-07
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the one-sidedness of the existing series compensation risk assessment based on preventive tests, unbalanced currents, and historical data, and at the same time break through the barriers to the design and manufacture of high-energy and large-capacity MOVs in the world, and improve the reliability of the series compensation system. rate, providing a MOV risk assessment method for series capacitance compensation devices

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  • Method for evaluating risks of MOV (metal oxide varistor) of series capacitive compensator
  • Method for evaluating risks of MOV (metal oxide varistor) of series capacitive compensator
  • Method for evaluating risks of MOV (metal oxide varistor) of series capacitive compensator

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Embodiment Construction

[0037] The content of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Example: see figure 1 As shown, in order to further illustrate the characteristics of the present invention, the present embodiment calculates as follows by specific example:

[0039] The parameter acquisition of the MOV risk assessment method for the series capacitor compensation device includes measuring the insulation resistance, absorption ratio and polarization index of the insulation resistance meter; measuring the DC reference voltage at 1mA, the DC reference voltage at 4mA, and the leakage current at 0.75 times the DC reference voltage DC high voltage generator; measure power frequency reference voltage under 1mA; power frequency reference voltage under 4mA, power frequency generator for resistive current; measure operating current of series capacitance compensation device MOV, unbalance of series capacit...

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Abstract

The invention discloses a method for evaluating risks of an MOV (metal oxide varistor) of a series capacitive compensator. The method includes the steps of (1) acquiring parameters including preventive trial data and electric monitoring data of the MOV of the series capacitive compensator; (2) establishing characteristic quantity including failure modes and probability of risk occurrence, establishing an incidence matrix about the probability of risk occurrence and failure modes, and establishing the risk evaluation for the MOV of the series capacitive compensator. Based on preventive trials, unbalanced current and historical data, the method can evaluate series compensation risks, simultaneously breaks through design and manufacture problem of international high-energy high-capacity MOVs, and improves operation reliability of the series compensation system.

Description

technical field [0001] The invention relates to the technical field of series capacitor compensation for AC power transmission, in particular to an MOV risk assessment method for a series capacitor compensation device. Background technique [0002] With the continuous growth of the national economy and the increasing demand for energy in the whole society, at the same time, the shortage of land resources has caused great difficulties in planning new transmission line corridors. Therefore, it is important to improve the utilization rate of existing transmission line corridors to solve the current difficulties. role. The methods include light direct current transmission, raising the line voltage level, construction of multi-circuit power transmission on the same tower, series capacitor compensation device (series compensation), etc. However, light direct current transmission, raising the line voltage level, and construction of multi-circuit power transmission on the same tower...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 张胜慧刘相枪赵建宁钱海邓军吕金壮王奇王剑坤楚金伟周震震常安李晋伟
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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