Power System Relay Protection Secondary Circuit Protection Research

Reliable operation of the high voltage circuit breaker in the safe operation of the power system, whether or not the decision of the stability and reliability of the system is running. The reliable operation of the high voltage circuit breaker or not depends on the reliability of the control loop, which "Anti-jump" loop and the tripping/closing loop reliability is the key to control loop. Paper on practical engineering control loop diagram specific proposals "Anti-jump" the loop improvement and rationalization tripping/closing loop monitoring protection.First of all, the introduction of the concept of the secondary loop of the power system, and a brief description of the requirements of the secondary loop of the control loop counter-measures. On the analysis and comparison of domestic and foreign control loop applications of "Anti-jump" loop principle, for domestic two widely used "Anti-jump" loop simulation studies, for the presence of high voltage circuit breaker auxiliary contacts competition issues, and propose concrete solutions measures.Secondly, the analysis of domestic current control loop monitoring method, the control loop diagram according to the actual engineering the MATLAB simulation study found that the current monitoring methods are not good tripping/closing loop integrity monitoring. Tripping/closing Coil protection issues in the current monitoring methods, consider changes to the simulation model, tripping/closing loop integrity monitoring and tripping/closing coil protection role.Finally, to improve the control loop of the actual project and analyze the feasibility, reasonable design hardware solutions to achieve complete various components of real-time monitoring and protection of the control loop, and Protel99SE build connections. Through the analysis of a variety of current condition may occur in the control loop, complete single-chip software program command design.