双馈风电机的虚拟惯性控制优化策略  

Improved Virtual Inertial Control Strategy of Doubly-fed Induction Generator

作　　者：王鑫[1] 杨德健 金恩淑 郑太英 金朝阳 WANG Xin;YANG Dejian;JIN Enshu;ZHENG Taiying;JIN Zhaoyang(Key Laboratory of Modern Power System Simulation Control and New Technology of Green Electric Energy,Ministry of Education(Northeast Electric Power University),Jilin132012,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310058,China;Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education(Shandong University),Jinan 250061,China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林吉林132012 [2]浙江大学电气工程学院,浙江杭州310058 [3]电网智能化调度与控制教育部重点实验室(山东大学),山东济南250061

出　　处：《智慧电力》2022年第8期1-6,81,共7页Smart Power

基　　金：国家自然科学基金资助项目(51907106);国家电网有限公司科技项目资助(SGLNDK00XXJS2100008)。

摘　　要：电力系统在面对不同扰动时,双馈风力电机采用传统虚拟惯性控制不能充分利用转子动能参与调频,提出一种改进的虚拟惯性控制策略。对现有的风机传统虚拟惯性控制方法中的控制增益进行改进,即将控制增益与频率偏差建立耦合关系,使双馈风力电机根据系统频率偏差实时调整调频增发功率,减缓频率跌落速度,提高频率最低点。基于EMTP-RV仿真平台搭建含高比例风电渗透率的电力系统模型,验证改进方法的有效性。仿真结果表明,提出的改进虚拟惯性控制方法在不同扰动下均可大幅改善频率稳定性,且随扰动增大,改善效果越明显。When power system is faced with different disturbances,DFIG adopting traditional VIC is unable to utilize its rotor kinetic energy to participate in frequency regulation in sufficient,an improved VIC strategy of DFIG is proposed.The control gain in existing traditional virtual inertia control method for wind turbines is improved by establishing coupling relationship between the control gain and frequency deviation,so that DFIG can adjust output power in real time according to the system frequency deviation,slow down the frequency drop and increase the frequency nadir.The power system model with high wind power penetration,which is modeled by using EMTP-RV,is employed to verify the effectiveness of improved VIC method.The simulation results show that the improved VIC method could effectively improve the frequency stability under different disturbances,and the improvement becomes more obvious with the increase of disturbances.

关 键 词：双馈风力发电机 扰动 虚拟惯性控制 控制系数 频率偏差 

分 类 号：TM614[电气工程—电力系统及自动化]