变压器中压侧限流电抗器的应用及实效分析

Application and Actual Effect Analysis of Current Limiting Reactor in Medium Voltage Side of Transformer

电网末端线路故障易引起与主网弱联系的小型机组失稳切机。为了保证电力系统安全稳定运行,可在变压器中压侧串入快速投入型限流电抗器。仿真分析与现场运行效果表明,限流电抗器投入后,通过快速断路器控制电抗器的投、切,减小了线路远端故障对电厂机组的冲击,有效抑制了小电源与主电网之间的系统振荡。

Faults at the terminal line of power grid are easy to cause the instability and tripping of small generator unit which has weak connection with main power grid.In order to secure the power system security and stability operation,fast switching type current limiting reactor can be connected to the medium voltage side of transformer in series.Simulation analysis and field operation effects show that after the operation of current limiting reactor,by the switching on and off of reactor controlled by rapid circuit breaker,compact of far end fault of line to power plant units was reduced which effectively constraint system oscillation between small power source and main power grid.