Circuit breaker switching-on and switching-off control method

Abstract

The invention relates to a circuit breaker switching-on and switching-off control method. The method includes the following steps that: (1) circuit breaker switching-on and switching-off instructions emitted by a power distribution system are detected, and switching-on pulses are generated based on the switching-on and switching-off instructions; (2) the information of the positions of the switching-on and switching-off of a circuit breaker is obtained, the output duration of switching-on pulses and switching-off pulses is recorded, and the output duration of the switching-on pulses and the switching-off pulses is compared with the current time of the switching-on and switching-off of the circuit breaker; and (3) whether the positions of the switching-on and switching-off of the circuit breaker are qualified is judged, if the positions of the switching-on and switching-off of the circuit breaker are qualified, a driving instruction is emitted so as to drive corresponding switching-on and switching-off coils of the circuit breaker to act, if the positions of the switching-on and switching-off of the circuit breaker are unqualified, the switching-off coil of the circuit breaker acts. With the circuit breaker switching-on and switching-off control method of the invention adopted, it can be ensured that the output duration of the pulses will not be smaller than the required action time of the permanent magnet circuit breaker, and therefore, the failure of switching-on and switching-off caused by the early stopping of the pulses which is further caused by errors of detected switching-on and switching-off position information can be effectively avoided.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a control method for closing and opening the circuit breaker. Background technique [0002] The circuit breaker is an important electrical equipment for the protection and control of the power system. The reliability, real-time performance and stability of its operation are directly related to the safety and stability of the power system. In recent years, circuit breakers have developed rapidly, which is mainly reflected in the intelligence of its control unit and real-time online detection. With the development of smart grid, higher requirements are put forward for the functions of circuit breakers. The existing intelligent controllers of circuit breakers are generally based on microprocessors such as single-chip microcomputers and DSPs. The functions are mainly based on the basic three-stage protection. Differentiate by priority, complete the task with the highest priority first, and compl...

AI Technical Summary

Problems solved by technology

With the development of smart grid, higher requirements are put forward for the functions of circuit breakers. The existing intelligent controllers of circuit breakers are generally based on microprocessors such as single-chip microcomputers and DSPs. The functions are mainly based on the basic three-stage protection. Differentiate by priority, complete the task with the highest priority first, and complete the tasks with gradually decreasing priority in turn. This implementation method can no longer meet the requirements of the smart grid for circuit breakers

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