A method and system for dealing with ground excessive phase-splitting faults

Abstract

The invention discloses a ground over-phase-splitting fault processing method, comprising the following steps: S01, during the running of the train, detecting the fault of the ground over-phase-splitting device in real time; S02, disconnecting the The connection between the fault ground over-phase device and the substation. The invention also discloses a ground over-phase fault processing system, including: a fault detection module, used for real-time detection of the fault of the ground over-phase device during train operation; and a fault processing module, used for detecting the ground over-phase When the phase device fails, disconnect the connection between the faulty ground and the substation between the phase device and the substation. The ground excessive phase separation fault processing method and system of the present invention have the advantages of high safety and reliability.

Description

technical field [0001] The invention mainly relates to the technical field of train over-phase separation, in particular to a ground over-phase separation fault processing method and system. Background technique [0002] my country's electrified railway traction power supply system adopts 27.5kV single-phase power supply mode, and the traction substation converts the 110kV or 220kV three-phase power provided by the power system into 27.5kV single-phase AC power for the traction power supply network. However, single-phase power supply is easy to generate negative sequence current in the power grid, and the negative sequence current has a great impact on the equipment, transmission lines, and relay protection in the power grid. In order to balance the A, B, and C three-phase currents of the power system, the traction substation implements commutation and rotation power supply to the catenary. In order to prevent short circuit between phases, the phases of catenary should be s...

AI Technical Summary

Problems solved by technology

[0006] Disadvantages of power failure and excessive phase separation: there is a large loss of traction and speed of the train, especially when running at a low speed on a large ramp, due to the long time between power failure and closing of the excessive phase phase, the loss of locomotive speed is large and the loss of traction is serious; Overvoltage shock cannot be avoided; with the development of high-speed railways and heavy-duty railways in China, the method of power failure and phase separation is increasingly unable to meet the needs of high-speed railways and heavy-duty railways

The disadvantage is: the overvoltage shock and surge current are large, which may easily cause the main circuit breaker of the locomotive to trip

[0011] At present, there are many common faults of the ground over-phase splitting device, such as the failure of the axle counting sensor, the mistriggering of the switching switch of the over-phase splitting device, etc. In these cases, if the fault is not isolated, and if the train cannot detect the fault, the train will continue to pass The electric split phase may appear charged and break into the split phase, which will bring serious impact to the on-board electrical equipment, and may burn the on-board equipment, and arcing may occur during the split-phase break. Out-of-phase short circuit, which will cause damage to the electrical equipment of the traction substation. If the relay protection device of the substation is improperly coordinated, the scope of power failure may be expanded, affecting the normal operation of non-fault lines.

Images