Breaker electrical life diagnosis method and system based on dispatching automation data

A technology of scheduling automation and diagnostic methods, which is applied in the direction of circuit breaker testing, instruments, measuring electricity, etc., can solve problems such as inconvenient operation of the power grid, need for power outages, and inability to carry out continuous monitoring, so as to ensure continuous and reliable operation and reduce losses. Effect

Active Publication Date: 2020-04-03
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: power outage is required, which brings inconvenience to the operation of the power grid; continuous monitoring cannot be carried out, and for a large number of switching times, the cycle test carried out in one year or three years may miss the best monitoring time; the cost is high ,complex structure

Method used

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  • Breaker electrical life diagnosis method and system based on dispatching automation data
  • Breaker electrical life diagnosis method and system based on dispatching automation data
  • Breaker electrical life diagnosis method and system based on dispatching automation data

Examples

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Effect test

Embodiment 1

[0040] This embodiment provides a method for diagnosing the electrical life of a circuit breaker based on scheduling automation data, such as figure 1 , including the following steps:

[0041] S1: Set the alarm reference value Q of the electrical wear of the circuit breaker contact m ;

[0042] S2: Obtain the breaking load current of the circuit breaker in real time in the dispatching automation system;

[0043] S3: Obtain the number of circuit breaker openings in real time in the dispatching automation system;

[0044] S4: Calculate the accumulative amount of electrical wear Q of the circuit breaker according to the circuit breaker breaking load current and the number of times of breaking;

[0045] S5: Comparing the accumulative electrical wear amount of the circuit breaker calculated in S4 with the alarm reference value of the electrical wear amount of S1, if the value obtained by comparing the accumulative electrical wear amount of the circuit breaker to the alarm refere...

Embodiment 2

[0061] This embodiment provides a circuit breaker electrical life diagnosis system based on scheduling automation data, such as figure 2 ,include:

[0062] An alarm module, the alarm reference value Q of the electrical wear amount of the circuit breaker contact is set in the alarm module m , and according to the calculated accumulative electrical wear of the circuit breaker and the alarm reference value Q mFor comparison, if the value obtained by the cumulative electrical wear of the circuit breaker is above a certain value compared with the alarm reference value, an alarm will be issued;

[0063] A breaking load current acquisition module, the breaking load current acquisition module acquires the breaking load current of the circuit breaker in real time in the dispatch automation system;

[0064] The number of breaking times acquisition module, the number of breaking times acquisition module acquires the breaking times of the circuit breaker in real time in the dispatching...

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Abstract

The invention discloses a breaker electrical life diagnosis method based on dispatching automation data. The method comprises the following steps: S1, setting an alarm reference value Qm of the electrical wear amount of a breaker contact; S2, acquiring the on-off load current of the circuit breaker in real time in the dispatching automation system; S3, acquiring the on-off times of the circuit breaker in real time in the dispatching automation system; S4, calculating the accumulated electric wear amount Q of the circuit breaker according to the on-off load current and the on-off frequency of the circuit breaker; and S5, comparing the accumulated electric wear amount of the circuit breaker calculated in the step S4 with the alarm reference value of the electric wear amount in the step S1, and if the numerical value obtained by comparing the accumulated electric wear amount of the circuit breaker with the alarm reference value is greater than a certain value, giving an alarm.By scheduling the power grid operation data of the automation system, the load during the breaking action of the compensation capacitor or the reactor can be obtained in real time without installing any sensor, the electrical wear amount of the circuit breaker can be calculated in real time, the electrical wear amount can be monitored in real time, and the degradation degree of the contact of the circuit breaker can be alarmed.

Description

technical field [0001] The invention relates to the technical field of circuit breaker operation and maintenance, and more specifically, to a method and system for diagnosing the electrical life of a circuit breaker based on scheduling automation data. Background technique [0002] The 35kV compensation capacitor and compensation reactor in the 500kV substation need to be switched frequently, and for its circuit breaker, each switching action is a load action. A large number of on-load switching actions seriously aggravate the performance degradation of the arcing contacts of the circuit breaker. After the degradation reaches a certain level, the arc extinguishing will fail when the circuit breaker is switched off, and the arc extinguishing gas chamber will explode. If the deterioration degree of the arc-extinguishing contact cannot be monitored in time, the safe and stable operation of the power grid will be seriously affected. Existing test methods mainly use periodic pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3271G01R31/3274
Inventor 刘少辉刘崧曾庆辉陈贤煕武利会梁年柏唐琪赖艳珊李兰茵
Owner GUANGDONG POWER GRID CO LTD
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