OLTC对电压稳定影响的仿真分析

Analysis of the Effect of OLTC on the Voltage Stability through Time Domain Simulation

采用时域仿真的方法,以单节点无穷大系统模型为对象,研究了有载调压变压器分别对电压稳定性的动态影响。表明了在考虑了动静态负荷的情况下,在系统无功功率不足且系统扰动较小时候,存在由于OLTC的连续调节而引起的慢动态电压失稳。同时讨论了OLTC闭锁和OLTC反调以防止电压失稳的有效性。

By Using time domain simulation based on the one-noded infinitude system model,the influence of the OLTC on the voltage stability is analyzed.It is shown that the dynamical of OLTC can lead to long-term voltage instability after a small disturbance when the system lacks reactive power and both dynamic and static parts of load model are consided.The validity of locking the adjustment and reverse adjustment of OLTC to prevent the voltage collapse is expolered.