Protection method of high-voltage circuit breaker control circuit intelligent anti-burning module based on DSP

Abstract

The invention discloses a protection method of a high-voltage circuit breaker control circuit intelligent anti-burning module based on a DSP. A DSP operation module calculates the breaking / closing time of a circuit breaker. When the breaking / closing current monitored by the monitoring circuit of a Hall sensor is significantly higher than normal breaking / closing current, whether there is a short-circuit fault in the breaking / closing circuit is judged accurately, and the breaking / closing circuit is cut off immediately according to an instruction issued by a DSP protection module. Thus, upstream equipment and electrical components are protected from damage to the maximum. The shortcomings of the prior art are overcome.

Description

technical field [0001] The invention relates to a protection method for an intelligent anti-burning module of a control loop of a high-voltage circuit breaker, in particular to a protection method for an intelligent anti-burning module of a control loop of a high-voltage circuit breaker based on DSP, and belongs to the technical field of electric power protection. Background technique [0002] Circuit breakers are the equipment with the most frequent mechanical and electrical actions in substations. They have a high failure rate during operation, and are likely to cause grid accidents and cause large economic losses. Therefore, very high requirements are put forward for their reliability. In the actual operation process, the failure of the mechanical state of the circuit breaker presents a variety of consequences: mainly refusal to open, refusal to close, and the mechanical characteristics of the circuit breaker do not meet the requirements of the regulations. For example, t...

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Problems solved by technology

[0003] In the actual maintenance process of the circuit breaker, due to the long running time of the equipment, the serious aging of the equipment, and the unreasonable internal design, etc., it has brought great inconvenience to the operation and maintenance personnel in the daily production process.

For old-fashioned circuit breakers, such as LW8-35, VB1 and other circuit breakers, the closing coil is often placed inside the mechanism, which is not easy to disassemble and replace

Once the closing coil has a fault such as burning, it will be a time-consuming and laborious technical work to replace it, which will not only seriously increase the operation and maintenance cost of the power grid, but also seriously reduce the power supply reliability of the power grid company and increase the risk of power grid operation

[0004] The patent name is: Intelligent circuit breaker control circuit protection and monitoring device, the application number is: 201621116102.0, the inventor Gan Lingxiao introduced the intelligent circuit breaker control circuit protection and monitoring device, but did not further disclose its protection method, so it cannot be accurately The monitoring of the change in closing circuit current cannot provide decision-making basis for the next step of intelligent judgment

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