电网对称短路故障下双馈风电系统同步稳定分析及致稳控制策略  

Synchronization stability analysis and stabilization control strategy of DFIG-based wind power generation system under symmetric grid fault

作　　者：王聪博 余越 黄森 裴金鑫 王剑锋 姚骏[2] WANG Congbo;YU Yue;HUANG Sen;PEI Jinxin;WANG Jianfeng;YAO Jun(State Key Laboratory for Security and Energy Saving China Electric Power Research Institute,Beijing 100192,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Chongqing 400044,China;Chongqing Jialing Huaguang Photoelectric Technology Co.,Ltd.,Chongqing 400700,China)

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京100192 [2]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044 [3]重庆嘉陵华光光电科技有限公司,重庆400700

出　　处：《电工电能新技术》2023年第10期26-34,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：国家电网有限公司科技项目(5100-202255005A-1-1-ZN)。

摘　　要：双馈感应风力发电机(DFIG)在三相对称短路故障下极易与电网失去同步。研究双馈风电发电系统的同步稳定机理及其同步致稳控制策略是确保系统遭受大扰动后依然可以保持安全稳定运行的关键。为此,本文以双馈风机为研究对象,通过解析法揭示了DFIG系统大/小信号同步失稳机理及稳定边界,得到了系统的同步稳定运行区域,从而进一步完善了DFIG系统同步稳定判据。在此基础上,本文提出了一种虚拟负电阻控制策略,可有效提高风电机组的同步稳定性。Doubly fed induction generator(DFIG)is prone to lose synchronization with grid under three-phase symmetric fault.Studying the synchronization stability mechanism and stabilization control strategy of DFIG is the key to ensure that the system can keep safe and stable operation after being subjected to large disturbance.Therefore,this paper takes the DFIG system as the research object to reveal the large/small signal synchronization instability mechanism and boundary of the system through the analytical method.Furthermore,the synchronization stability operation region of the DFIG system is analyzed,and the synchronization stability criterion is given.On this basis,a virtual negative resistance control strategy is proposed in this paper,which can effectively improve the synchronization stability of the system.

关 键 词：双馈感应风力发电机 对称短路故障 同步稳定 虚拟负电阻 

分 类 号：TM614[电气工程—电力系统及自动化]