分布式发电对配电网电压暂降的影响

针对有分布式电源接入的配电网的特点建立了电压暂降分析模型，选择具有代表性的算例对配电网中电压暂降问题进行了仿真分析。研究了分别以同步发电机和逆变器为并网接口的分布式电源在不同条件下抑制电压暂降的能力。由仿真结果可以看出，分布式电源的类型和控制策略、系统网络参数以及扰动源与监测点之间的电气距离都会对电压暂降产生一定的影响。

Impacts of Distributed Generation on Distribution System Voltage Sags

According to the characteristic of distribution network with distributed generation(DG) connected,a voltage sag analysis model is built and by means of typical case study the simulation analysis of voltage sag in distribution network is conducted.Taking synchronous generator and inverter as connecting interface respectively,the ability of suppressing voltage sag by DG under different conditions is researched.Simulation results show that the type and control strategy of DG,network parameters and electrical distance between disturbance source and monitoring point have certain effect on voltage sag.