控制电缆分布参数对变电站开关场电磁继电器的影响仿真

Simulation of the Influence of Control Cable Distribution Parameters on Electromagnetic Relay in Substation Switch Field

为了研究控制电缆分布参数对变电站开关场继电器的影响,选取500 kV变电站开关场电磁继电器为研究对象,研究控制电缆末端正接地控制电缆分布参数对其电压的影响。基于控制电缆分布参数、继电器参数等条件,构建电路模型,进行理论和仿真分析。结果表明:继电器为R模型时,其电压波形仅为指数衰减波形;继电器为RL模型时,其电压波形受系数σ、系数k的影响。可见继电器电阻及电感、非故障馈线分布电容均对其电压产生影响。

In order to study the influence of control cable distribution parameters on substation switchyard relay,the electromagnetic relay of 500 kV substation switchyard was selected as the research object to study the influence of control cable distribution parameters on its voltage.Based on the control cable distribution parameters,relay parameters and other conditions,the circuit model was constructed and theoretical and simulation analyses were carried out.The results show that when the relay is R model,its voltage waveform is only exponential decay waveform;when the relay is RL model,its voltage waveform is affected by the factorsσand k.It can be seen that the resistance and inductance of the relay and the distributed capacitance of the non-fault feeder have an impact on its voltage.