Circuit breaker control method, device, rail transit traction control system and train

Abstract

The present invention provides a control method and device for a circuit breaker, a rail transit traction control system and a train. One end of the circuit breaker is connected to the power grid, and the other end of the circuit breaker is connected to an inverter. The control method of the circuit breaker includes: obtaining The first actual power value on the grid side and the second actual power value on the inverter side; respectively calculate the first difference between the target power value and the first actual power value and the difference between the target power value and the second actual power value The second difference value; according to the first difference value and the second difference value, it is judged whether the circuit on the grid side or the inverter side is abnormal; if it is abnormal, the circuit breaker is turned off. The circuit breaker control method, device, rail transit traction control system and train of the present invention can comprehensively and comprehensively judge the excessive fluctuation or abnormal state of the current and voltage on the grid side and the inverter side, improve the reliability of the judgment result, and When the circuit on the grid side or the inverter side is abnormal, the circuit breaker is disconnected to ensure the safety of the inverter and the electrical system.

Description

technical field [0001] The invention relates to the technical field of rail traffic control, in particular to a control method and device for a circuit breaker, a rail traffic traction control system and a train. Background technique [0002] In rail traffic control systems, high-speed circuit breakers are usually used to protect inverters and electrical equipment. [0003] In related technologies, the protection strategies of high-speed circuit breakers are generally divided into two forms. One is the automatic overcurrent tripping protection method of high-speed circuit breakers. The protection method is: when overcurrent is detected, the high-speed circuit breaker will automatically trigger disconnect , to realize the protection of inverters and electrical equipment, but this method has no obvious effect on the fault reflection and low reliability for instantaneous extreme overvoltage faults; it is a protection method for software-controlled high-speed circuit breaker dis...

AI Technical Summary

Problems solved by technology

[0003] In related technologies, the protection strategies of high-speed circuit breakers are usually divided into two forms. One is the automatic overcurrent tripping protection method of high-speed circuit breakers. , in order to protect the inverter and electrical equipment, but this method has no obvious reflection effect on the fault and low reliability for the instantaneous extreme overvoltage fault; a protection method for software-controlled high-speed circuit breaker disconnection

The protection method is: when the voltage fluctuation on the grid side is too large, or when the voltage on the grid side is abnormal, the high-speed circuit breaker is controlled to be disconnected, but this method can only deal with the excessive or abnormal voltage fluctuation on the grid side. When a fault occurs, the response to the fault is not obvious and the reliability is low

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