Protection method for high-speed rail regenerative braking energy feedback system
A regenerative braking and energy feedback technology, applied in electric braking systems, emergency protection devices with automatic disconnection, emergency protection circuit devices, etc., can solve overcurrent and overvoltage, affect the normal operation of traction power supply system, and cannot Fault protection and other issues to achieve the effect of preventing island operation
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[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0027] figure 1 Shown is a schematic diagram of the electrical topology of the high-speed rail regenerative energy feedback system protection system. The system consists of traction power supply system, multi-winding step-down transformer, multiple four-quadrant converter, three-phase inverter, grid-connected step-up transformer, railway 10kV power supply system, sensors and switch cabinets. The main functions of the system are:
[0028] 1) Feed back the regenerative braking energy generated by regenerative braking of high-speed rail trains to the railway 10kV power supply system;
[0029] 2) Transfer the load from the high-power bridge arm to the low-power bridge arm, realize the load balance of the two power supply arms, and control the negative sequence current;
[0030] 3) Carry out reactive power compensation and harmonic control.
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