分布式电源对配电网电压的影响

Probe into Influence of Distributed Generation on Distribution Network Voltage

针对分布式电源并网后对系统电压所造成的影响,引进分布式电源渗透率的概念,在分布式电源渗透率和安装位置变化两种情况下,对配电网的运行规律进行了分析,同时考虑了系统负荷变化时,引起的DG渗透率及系统电压的影响,并通过对IEEE14节点系统进行了仿真研究,从DG渗透率与节点电压的关系曲线中,得出了分布式电源渗透率对系统电压分布有着直接的影响,只要台理规划分布式电源,就能发挥电压支撑作用,确保配电网可靠运行。

In the light of the influence of distributed generation paralleling in grid on power system voltage, this paper introduces the conception of penetration levels of distributed generation, and makes an investigation on the influence of the penetration level and interconnected location on the system operation laws. Simuhaneously, this paper considers the influence of system load changing on DG penetration levels and system voltage, and makes a simulation on IEEE14-bus test system. The results show that the DG penetration levels have direct effect on the power system voltage. It would play a role of voltage support as long as a reasonable planning to ensure reliable operation of distribution network.