有载调压变压器调整对电力系统电压稳定性的影响

The Power System Voltage Stability Affected by On-load Tap Changer

本文利用分叉理论，在静态范围讨论了有载调压变压器分接头调整对电力系统电压稳定性影响问题。研究表明，对应于不同负荷模型，有载调压变压器变比变化对电压失稳静分叉点的“迁移”方向、最终位置、调压效应会产生很大影响。此外，研究发现，一些负荷模型在一定负载区域内，有载调压变压器分接头调整还会产生复杂的“混合调压效应”现象。

In the static range , the voltage stability affected from the action of on-load tap changer(OLTC) is discussed by use of the bifurcation theory . The analysis in this paper demonstrates clearly that the“migrating direction” ,“final position”of voltage instability static-bifurcation curve and regulating voltage effect are affected by OLTC action with different type load model . Moreover, in some load region, the complicated phenomenon of “mix regulating voltage effect”is discovered in this paper.