Circuit breaker nozzle ablation state evaluation system

Abstract

The invention discloses a circuit breaker nozzle ablation state evaluation system. The system comprises a multi-helium ion detection device, a parameter input module and a analysis terminal, wherein the multi-helium ion detection device is used for performing separation test on components of a mixed gas of decomposed products of the circuit breaker to be tested so as to track the evolution development trend of components of an SF6 gas, the parameter input module is used for inputting test parameters corresponding to a multi-helium ion detection module according to the application scene evaluated by a circuit breaker nozzle, the key characteristic parameter extraction module is used for extracting key characteristic parameters according to analysis test data of the multi-helium ion detection device, and the analysis terminal is used for performing analysis and calculation by combining the analysis test data of the multi-helium ion detection device with the key characteristic parametersextracted by the key characteristic parameter extraction module so as to carry out arc extinguishing chamber nozzle state analysis and maintenance strategy making. The system can provide the key basisfor the rapid, efficient and accurate evaluation of the residual useful life of the arc extinguishing chamber nozzle, and help the maintenance personnel to make an overhaul plan better, so that the power failure inspection time is shortened, and the power failure loss is reduced.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a circuit breaker spout ablation state evaluation system. Background technique [0002] According to the statistical results of the International Conference on Large Power Grids (CIGRE), the electrical life of a high-voltage circuit breaker is one of the main factors affecting the service life of the circuit breaker, and the arc contact and nozzle are the key components that determine the length of the electrical life. [0003] With the continuous construction and operation of my country's west-to-east power transmission "eight crossings and ten straight lines" and cross-regional networking projects, the capacity of the power system continues to increase, and the short-circuit capacity continues to increase, which puts higher demands on the ability of circuit breakers to break short-circuit current Require. Among them, the AC filter circuit breaker needs to be switched fr...

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Problems solved by technology

[0005] 1. Before the overhaul and disintegration of the interrupter, the loss data of the nozzle cannot be obtained in advance, and the hidden danger of the nozzle before the overhaul cannot be predicted

[0006] 2. Even if there is doubt about the state of the interrupter and dismantling inspection is carried out, measures such as power outage and replacement of equipment will consume a lot of resources

[0007] for tracking SF 6 The evolution and development trend of gas components requires real-time monitoring of the gas components during the opening and closing process of the circuit breaker. However, the currently commonly used on-site sampling cylinder method cannot meet the needs of project research, and there is a problem of low detection efficiency. At the same time, the cylinder adsorption and long-distance transportation 、Long storage time makes the sample gas component content and the field component content show a big difference, which leads to the SF 6 The status evaluation data of electrical equipment is untrue, not comprehensive, and has different dimensions, which cannot meet the project monitoring requirements

However, the existing laboratory detection methods have problems such as large size, inconvenient on-site operation, and slow data detection results.

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