基于PMU的支路电压稳定指标研究

基于PMU技术的电压稳定预警需要对功率传输通道的运行情况进行实时监测。已有的支路电压稳定指标忽略了无功的影响因素，且仅适用于负荷功率因数恒定的情况。文中提出了综合考虑支路有功与无功的新指标．该指标适用于任何负荷功率因数的情况，并对该指标进行了详细的推导。用IEEE14节点系统对该指标进行了测试．结果表明该指标能更好地反映支路的运行和电压稳定情况．

Study on Voltage Stability Index of Branch Power Flow Based on PMU

Voltage stability prewarning based on the PMU technology needs to monitor operation of power transmission lines in real-time.The existing branch voltage stability index only can be used in the case of the constant power factor because it ignores the effect of reactive power.A new index considering branch active and reactive comprehensively was proposed in this paper.The index is applicable to various load power factors.Detailed derivation was made on this index.The index was tested in IEEE14 bus system,and the results indicate that it could reflect branch operation and voltage stability conditions better.