考虑风电接入与负荷不确定性的静态电压稳定性分析  

Static voltage stability analysis considering the wind power and uncertainty of load

作　　者：段贵钟 秦文萍[1] 逯瑞鹏 雷达 肖莹 许进[1] DUAN Guizhong;QIN Wenping;LU Ruipeng;LEI Da;XIAO Ying;XU Jin(Shanxi Key Laboratory of Power System Operation ＆ Control （Taiyuan University of Technology） Taiyuan 030024, China;State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China)

机构地区：[1]电力系统运行与控制山西省重点实验室(太原理工大学),山西太原030024 [2]国网山西省电力公司电力科学研究院,山西太原030001

出　　处：《电力系统保护与控制》2018年第12期108-114,共7页Power System Protection and Control

基　　金：山西省重点研发计划重点项目资助(201603D 112001);山西省电力公司科技项目资助(SGTYHT/14-JS-188)~~

摘　　要：随着风电渗透率不断提高,其对系统电压稳定性的影响已经不容忽略。根据风电特性,计及风电机组由于电压降低进入降功率运行的情况,同时考虑充分利用风电场无功补偿剩余容量,提出了一种考虑风电接入情况下的改进连续潮流算法。为了研究负荷不确定性对系统的影响,使用概率潮流法进行电压稳定性分析。分析过程中,以所提出的改进连续潮流法对含有风电系统的样本进行计算,同时使用模糊C均值聚类算法进行负荷聚类,建立基于负荷聚类的拉丁超立方抽样概率潮流模型。分别在IEEE 14节点系统和IEEE 57节点系统中加入风电进行算例分析。分析结果表明,所提方法分析结果更符合实际情况,而且提高了概率潮流算法的样本利用率。As the wind power penetration is increasing ceaselessly, the influence of wind power for voltage stability should not be ignored. According to the characteristics of wind power, this paper proposes an improved continuation power flow method. This method considers the wind generators switching to power-reducing mode when the voltage declines. At the same time, this method considers using the wind farm＇s remaining capacity of reactive power compensation device to improve the condition of grid voltage. To study the influence of load uncertainty on system, the probabilistic load flow is used to make voltage stability analysis. The improved continuation power flow method is used to research the samples of probabilistic load flow. At the same time, the fuzzy C-mean clustering is used to find the load bus group. A Latin hypercube probabilistic load flow model based on load clustering is built. The validity of proposed method is tested on IEEE 14 and IEEE 57 bus system, which have wind farms. The simulation result shows that the method of this paper matches the practice better. Besides, this method can improve the sampling efficiency.

关 键 词：静态电压稳定性 连续潮流 风电 无功补偿 负荷聚类 概率潮流 

分 类 号：TM712[电气工程—电力系统及自动化]