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Unrestrictive expected operation life assessment method for distribution network lightning arrester under given confidence level

A non-restrictive, confidence-level technique applied in the direction of instruments, measuring devices, measuring electronics, etc.

Active Publication Date: 2011-09-07
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] So far, there is no more accurate evaluation method for evaluating the long-term trouble-free expected operating life of arresters under a given confidence level

Method used

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  • Unrestrictive expected operation life assessment method for distribution network lightning arrester under given confidence level
  • Unrestrictive expected operation life assessment method for distribution network lightning arrester under given confidence level
  • Unrestrictive expected operation life assessment method for distribution network lightning arrester under given confidence level

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with specific embodiments.

[0017] This evaluation method includes the following steps:

[0018] Step 1: Monitor the unrestricted lightning overvoltage amplitude at the installation point of the arrester within one year, and count its distribution;

[0019] Step 2: Calculate the statistical distribution of the lightning impulse discharge capacity resource consumption of the arrester within one year;

[0020] Step 3: Calculate the expected life of the arrester to limit the lightning overvoltage.

[0021] The voltage amplitude of the step 1 is obtained through the following monitoring and calculation:

[0022] 1. Statistical distribution of unrestricted lightning overvoltage amplitude at the installation point of arrester for distribution network

[0023] The calculation of the statistical distribution of the unrestricted lightning overvoltage at the installation point of the arrester shall...

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Abstract

The invention discloses an unrestrictive expected operation life assessment method for a distribution network lightning arrester under a given confidence level. The method comprises the following steps of: 1, monitoring the lightning overvoltage amplitudes at the installation position of the lightning arrester in one year, and counting the amplitude distribution; 2, calculating the statistical distribution of lightning impact discharge capacity resource consumption of the lightning arrester in one year; and 3, calculating the unrestrictive / restrictive lightning overvoltage expected life of the lightning arrester under the given confidence level. According to the method, the lightning overvoltage serving as a decisive factor of the service life of the lightning arrester for a distribution network is analyzed, a route and a method for calculating lightning discharge capacity resource of the lightning arrester for the distribution network and one-time lightning arrester lightning discharge capacity resource consumed by overhead circuit overvoltage due to lightning are further introduced, and finally, the expected operation life of the lightning arrester for the distribution network is calculated by adopting simplified parameters and the method.

Description

technical field [0001] Judging the service life of electrical equipment is an important part of power system asset management, and it is also one of the criteria for evaluating whether the power system can operate safely. However, the end of life of electrical equipment is often a subjective judgment of the power system, because equipment failures are likely to be caused by many accidental factors. The function of the distribution network arrester is to protect other equipment. If it is not protected, its application is worthless, and it will cause damage to the protected equipment at a higher cost. Therefore, it is of great significance to evaluate the reliability of the arrester, that is, under a given confidence level, to evaluate the long-term trouble-free expected operating life of the arrester. Background technique [0002] The calculation of the expected operating life of the arrester for distribution network is to verify the reliability of the arrester for distribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R19/17
Inventor 彭向阳王保山彭发东熊易雷晓燕汤霖左中秋贾锦朝万克陈立梁菊霞
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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