分布式电源并网对配电网的影响

针对分布式电源并网问题,定量分析了分布式电源DG对配电网网损和电压产生的影响。简述了DG的类型和潮流计算模型,以及各种潮流计算模型的处理方法;应用PSASP软件对IEEE 30节点系统进行潮流计算,定量分析DG的位置和容量对配电网网损和电压产生的影响。仿真结果表明：分布式电源并网位置相同时,并网容量越大,对系统节点电压和有功网损的影响越大;分布式电源并网容量相同时,并网位置越靠近系统末端,对系统电压的提升作用越明显,且对并网位置及其附近处的电压支撑作用最强。

Effect of Distributed Generation Grid-Connection on Distribution System

In view of distributed generation grid-connected problems, analyzed the impact of distributed generation on active power loss and voltage. Described DG type and power flow calculation model and introduced the methods about various flow calculation models. Calculated power flow in IEEE 30 node system by PSASP software and analyzed the impact of DG position and capacity on active power loss and voltage. The simulated results showed that when the distributed generation in the same position interconnected, the larger capacity of distributed generation has a relative larger influence on active power loss and the node voltage; when the distributed generation in the same capacity interconnected, the grid-connected position is closer to the end of the system, the system voltage promoting is more obvious and the enhancing for voltage is highest in the gird-connected position and its vicinity.