地铁接触网短路状态下钢轨电位和限压保护装置研究

Research on Rail Potential and Voltage Limiting Protection Device Under Short Circuit Condition of Catenary in Metro

钢轨电位限制装置(OVPD)是地铁回流网络中重要的保护装置。构建了地铁供电网络电路模型,仿真测量了接触网短路状态下的钢轨电位、流经OVPD保护点晶闸管中的电流。研究成果可为OVPD保护装置晶闸管的选型提供依据。

Rail potential limiting device OVPD is an important protective device in metro backflow network.Subway power supply circuit model was constructed,and the rail potential under short circuit condition of catenary as well as the current flowing though the protecting thyristor of the OVPD device were simulated and measured.The research results can provide a basis for the thyristor selection of protection device.