基于动态等效电路的含dg电力系统电压稳定性分析-电力系统保护与.pdf

第 45 卷 第 6 期 电力系统保护与控制 Vol.45 No.6 2017 年 3 月 16 日 Power System Protection and Control Mar. 16, 20 17 OI: 10.7667/PSPC1604 16 基于动态等效电路的含 G 电力系统电压稳定性分析 颜廷鑫，刘光晔，肖白雪，罗岩菲 (湖南大学电气与信息工程学院，湖南 长沙 41 82) 摘要：分布式电源( istributed generation, G)接入电网对电力系统电压稳定有一定影响。首先对 G 接入节点内 系统进行综合动态等效，将动态等效电路的分析方法应用于含 G 的电力系统。然后将 G 视为 “负”的负荷， 提出 G 接入后评价系统静态电压稳定性的广义阻抗模裕度指标。基于广义阻抗模裕度指标，具体分析了 G 不 同接入方式、出力大小对系统电压稳定性的影响和优化无功补偿的效果。最后通过仿真验证了所提方法是研究含 G 电力系统静态电压稳定性的一种实用和方便的方法。 关键词：电力系统；动态等效电路；阻抗模裕度指标；分布式电源；电压稳定 Voltage stability analysis of power system with DGs based on dynamic equivalent circuit YAN Tingxin, LIU Guangye, XIAO Baixue, LUO Yanfei (College of Electrical and Information Engineering, Hunan University, Changsha 4 10082, China) Abstract: istributed generation connected to grid will have certain impact on voltage stability of power system. At first, the comprehensive dynamic equivalence circuit of internal grid of G integrating bus is implemented; and on the basis, the method of dynamic equivalent circuit is further extended to the grid-connected G which is regarded as a “negative” load; and general impedance modulus margin index is put forward to evaluate the system static voltage stability. The impacts of the output and their different installation methods of G on system voltage stability and optimization of reactive power compensation are researched based on general impedance modulus margin index. At the last, the proposed method is proved to be a practical and convenient me