适用于次同步振荡分析的直驱式风电场等值方法  

Equivalent method of PMSG-based wind farm suitable for subsynchronous oscillation analysis

作　　者：袁赛军 郝治国[2] 舒进 YUAN Saijun;HAO Zhiguo;SHU Jin(Electric Power Dispatching and Control Center of State Grid Hunan Electric Power Company Limited,Changsha 410004,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]国网湖南省电力有限公司电力调度控制中心,湖南长沙410004 [2]西安交通大学电气工程学院,陕西西安710049 [3]西安热工院有限公司,陕西西安710054

出　　处：《电力自动化设备》2022年第12期66-71,共6页Electric Power Automation Equipment

基　　金：中国华能集团有限公司总部科技项目(HNKJ18-H34)。

摘　　要：为解决大规模直驱式风电场阻抗建模困难和数值仿真节点限制的问题,基于阻抗分析法的核心原理,以等值前、后直驱式风电场外阻抗特性相一致为目标,提出了适用于次同步振荡分析的直驱式风电场等值方法。该方法包括基于阻抗灵敏度分析的分群聚合和基于遗传算法的等值降阶2个步骤。分别以风电场含相同型号直驱风机和不同型号直驱风机为例,对等值前、后的直驱式风电场外阻抗特性进行对比分析。结果表明,所提方法能够实现大规模直驱式风电场模型的等值降阶,等值前、后的直驱式风电场外阻抗特性较为接近,其等值误差能够被量化。In order to solve the problems of impedance modeling difficulty and node limitation of numerical simulation of large-scale PMSG(Permanent Magnet Synchronous Generator)-based wind farm,considering the basic principle of impedance analysis method,taking the consistence between the external impedance characteristics of PMSG-based wind farm before equivalence and that after equivalence as the goal,an equivalent method of PMSG-based wind farm suitable for subsynchronous oscillation analysis is proposed.The method contains two steps:clustering aggregation based on impedance sensitivity analysis and equivalent order reduction based on genetic algorithm.Taking wind farms with the same type and different types of PMSGs as examples,the comparison of the external impedance characteristics of PMSG-based wind farm between before and after equivalence is analyzed.The result shows that the equivalent reduced-order model of large-scale PMSG-based wind farm can be realized by the proposed method.The external impedance characteristics of the PMSG-based wind farm before and after equivalence are close,and the equivalence error can be quantified.

关 键 词：风电场等值 次同步振荡 阻抗分析法 直驱风机 灵敏度分析 遗传算法 

分 类 号：TM614[电气工程—电力系统及自动化]