基于修正能量函数和可信性理论的风机极限穿透功率模型研究  

Model Study for Determining the Wind Farm Penetration Limit Based on Corrected Energy Function and Credibility Theory

作　　者：白浩[1] 张丕沛 苏剑[2] 刘海涛[2] 苗世洪[1] Bai Hao;Zhang Pipei;Su Jian;Liu Haitao;Miao Shihong(State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China;China Electric Power Research Institute Beijing 100192 China)

机构地区：[1]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,武汉430074 [2]中国电力科学研究院,北京100192

出　　处：《电工技术学报》2017年第8期264-273,共10页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2016YFB0900400;2016YFB0900403)

摘　　要：建立了考虑暂态稳定约束和风速不确定性的风机极限穿透功率计算模型。采用修正能量函数法计算暂态稳定指标,建立暂态稳定约束条件。针对风电出力的不确定性,采用风速预测误差的模糊性表征风电出力的模糊性,并基于可信性理论建立了支路容量的模糊机会约束条件。结合暂态稳定约束,最终建立风电穿透功率的模糊机会约束模型。为了避免低效的模糊模拟求解,将模糊机会约束条件转化为其清晰等价类,简化模糊机会约束模型为易求解的混合整数线性规划模型。IEEE 30节点算例表明该方法可有效计算风机极限穿透功率。The paper proposes the model to determine the wind farm penetration limitconsidering the transient stability constraints and uncertainty of wind speed.The model adoptscorrected transient energy function to calculate transient stability index and put forward the transientstability constraints.The ambiguity of wind power output is represented by the credibility distributionfunction model of wind power forecast errors.Hence the fuzzy chance constraints are established forline capacity based on credibility theory.Finally,the fuzzy chance-constrained model is developed fordetermining wind farm penetration limit.Regarding the model solving,the fuzzy chance constraint isconverted to the equivalent form to avoid the inefficient fuzzy simulation.Thus the proposed model canbe simplified to the mixed integer linear programming model.The results of IEEE30bus system showthe proposed model is efficient to determine wind farm penetration limit.

关 键 词：风机极限穿透功率 修正能量函数 暂态稳定指标 可信性理论 模糊机会约束 

分 类 号：TM614[电气工程—电力系统及自动化]