分布式电源接入对系统电压稳定性的影响

Impact of Distributed Generation on Power System Voltage Stability

针对分布式电源接入后对系统电压所造成的影响,提出利用灵敏度分析方法进行分析计算。分析了分布式电源的出力、接入位置对系统电压的影响,运用这种方法找出了系统电压的支撑点和薄弱点,并得出结论:从电压支撑点接入分布式电源对系统电压影响效果最好。对某些薄弱母线,确定了无功补偿量,同时采取相应的控制措施对其电压进行调整。最后,通过对EPRI-36节点系统的仿真,证明了该方法的有效性。

In this paper, the impact of grid-connected distributed generation on power system voltage stability is analyzed and calculated by sensitivity analysis. The impacts of the output and, interconnected location of distributed generation on system voltage are researched and both weak points and supporting points of system voltage were found. The conclusion of this research is as following： the best effect of supporting system voltage can be obtained by interconnecting distributed generation at system voltage supporting point. For some weak buses, the amount of reactive power compensation is determined, meanwhile it is necessary to adopt corresponding control measures to regulate voltage at these buses. Finally, the effectiveness of the proposed approach is verified by simulation results of IEEE 36-bus test system.