PQ控制策略下多逆变型电源的故障等值方法  

Research on Fault Equivalence Method for Multiple Inverter-Interfaced Distributed Generation Based on PQ Control Strategy

作　　者：洪树斌 范春菊[1] 陈实[1] 苏建军 孙树敏 李广磊 HONG Shubin1, FAN Chunju1, CHEN Shi1, SU Jianjun2, SUN Shumin2, LI Guanglei2(1. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Minhang District, Shanghai 200240, China; 2. State Grid Shandong Electric Power Company Research Institute, Jinan 250021, Shandong Province, Chin)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240 [2]国网山东省电力公司电力科学研究院,山东省济南市250021

出　　处：《电网技术》2018年第4期1101-1109,共9页Power System Technology

基　　金：国家电网公司科技项目(SGTYHT/15-JS-191)~~

摘　　要：研究了定功率控制（PQ控制）策略下的逆变型分布式电源的多电源故障等值方法,通过分析单个逆变型电源、多个等容量逆变型电源、多个不等容量逆变型电源以及多个逆变型电源异地接入的输出特性,进而得到多个逆变型电源的故障等值方法,该方法简化了含多个逆变型电源的复杂网络故障分析时的计算复杂度。同时,提出了逆变型电源的故障等值分区方法,并利用迭代法对区域内的多个逆变型电源进行迭代计算得到等值模型。最后利用PSCAD搭建了含多个逆变型电源的配电网络仿真模型。在配电网络不同线路发生故障时,对配电网进行区域划分,并利用文中提出的等值方法计算等值后的逆变型电源输出特性,通过将计算得到的结果与仿真得到的结果相比较,验证了故障等值方法的正确性和有效性。Based on PQ control strategy, equivalence method for inverter-interfaced distributed generation（IIDG） is studied in this paper. According to analysis of output characteristics of different situations, such as single IIDG, multiple IIDGs with same capacities, multiple IIDGs with different capacities and multiple IIDGs at different locations, equivalence method for IIDGs is proposed to reduce computational complexity of fault analysis for complex networks with multiple IIDGs. Equivalence partition method for power grid with IIDGs is also proposed, and the equivalence model in each partition is obtained with iterative calculation. Finally, using PSCAD, simulation is carried out to verify correctness and effectiveness of the equivalence method.

关 键 词：PQ控制策略 逆变型分布式电源 故障等值方法 故障分析 

分 类 号：TM721[电气工程—电力系统及自动化]