含DFIG风电场的配电网静态电压稳定指标研究  

Study on static voltage stability random index for distribution network considering DFIG connected

作　　者：李默[1] 马瑞[1] 余鹏 吴震宇 杨海晶 杨旭 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410004 [2]河南省电力公司电力科学研究院,河南郑州450000 [3]国网湖南省电力有限公司,湖南长沙410076

出　　处：《电力科学与技术学报》2017年第4期3-9,共7页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51677007);湖南省教育厅创新平台开放基金(54291)

摘　　要：针对风电的随机出力将使配电系统的静态电压稳定性随机波动,提出含双馈式异步发电机的配网潮流算法和静态电压稳定指标。将DFIG稳态方程嵌入配电网前推回代潮流迭代计算过程,基于潮流解的存在推导出含DFIG的配电网静态电压稳定指标;考虑风电出力的随机性,分别定义母线静态电压稳定指标分布指数、道路静态电压稳定分布指数、系统静态电压稳定指标,提出的指标能较好地反映风电并网后配电网局部与整体静态电压稳定性的随机波动特性。基于蒙特卡洛随机模拟,结合该文提出的算法和指标能有效识别出配网中薄弱的母线节点和道路路径。在IEEE 33辐射型配电网系统进行算例仿真,验证了算法的正确性和静态电压评价指标的有效性。The random output of wind power will make the static voltage stability fluctuating randomly in distributed network. A power flow algorithm for distribution network considering DFIG connected was proposed, and then a static voltage stability index was presented. The DFIG steady state equations were put into the iteration steps of forward and backward method, and the static voltage stability index was derived based on power flow solutions. Considering the random output of distributed wind generation, the bus voltage stability distribution index, the path voltage stability distribution index and the system voltage stability index were defined. The proposed index can reflect the random fluctuation of static voltage stability of the local and global distributed network after wind power connected. Based onMonte-Carlo simulation, the weak bus node and path route could be recognized. The proposed algorithm and index were tested in IEEE 33 distributed system, which verified the accuracy of algorithm and the effectiveness of the static voltage random evaluation index.

关 键 词：配电网 分布式发电 双馈式异步发电机 随机电压稳定指标 静态电压稳定 

分 类 号：TM76[电气工程—电力系统及自动化]