The invention discloses an overvoltage protection control method which comprises the steps that when a train is in a low-voltage power-on state, a train bidirectional DC/DC converter receives a high-voltage power-on instruction and controls a contactor in a high-voltage distribution box to be closed according to the high-voltage power-on instruction; the train bidirectional DC/DC converter collects the voltage of a power grid, and if the voltage of the power grid is larger than or equal to a first preset threshold value, the train bidirectional DC/DC converter controls the contactor in the high-voltage distribution box to be disconnected; otherwise, if the power grid voltage is smaller than a first preset threshold value and larger than or equal to a second preset threshold value, and the train bidirectional DC/DC converter is in a reverse boost control stage, the train bidirectional DC/DC converter turns off a voltage control module in the train bidirectional DC/DC converter, and the first preset threshold value is larger than the second preset threshold value. According to the scheme, overvoltage control and protection are carried out on power grid voltage rise caused by electric braking of the train, overvoltage control and protection are also carried out on other electric appliances, a power supply grid and energy storage equipment in the train, and tripping of the train and the energy storage equipment due to overvoltage is avoided.
本发明公开一种过压保护控制方法,包括:列车处于低压上电状态下,列车双向DC/DC变换器接收高压上电指令,根据高压上电指令控制高压配电箱内的接触器吸合;列车双向DC/DC变换器采集电网电压,如果电网电压大于等于第一预设阈值,则列车双向DC/DC变换器控制高压配电箱内的接触器断开;反之,如果电网电压小于第一预设阈值,大于等于第二预设阈值,且列车双向DC/DC变换器处于反向升压控制阶段,则列车双向DC/DC变换器关断其内部的电压控制模块,其中,第一预设阈值大于第二预设阈值。本方案不仅对列车电制动引起的电网电压升高进行过压控制及保护,还对列车内的其他用电器、供电电网以及储能设备进行过压控制及保护,避免列车与储能设备因过压而跳闸。
Overvoltage protection control method
过压保护控制方法
2024-01-05
Patent
Electronic Resource
Chinese
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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