基于任意时刻电网故障下的双馈风力发电机定子磁链全响应研究  

Research on Complete Response of Stator Flux of Doubly-fed Induction Generator Based on Grid Fault at Anytime

作　　者：何璇[1] 屠卿瑞 李一泉 李银红[1] 石东源[1] HE Xuan;TU Qing-rui;LI Yi-quan;LI Yin-hong;SHI Dong-yuan(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China;Electric Power Dispatching and Control Center,Guangdong Power Grid Corporation,Guangzhou 510002,China)

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074 [2]广东电网有限责任公司电力调度控制中心,广东广州510002

出　　处：《水电能源科学》2018年第8期209-213,共5页Water Resources and Power

摘　　要：为研究双馈风力发电机(DFIG)定子磁链的全响应与电网故障发生时刻的关系,通过求解DFIG状态方程,得到任意时刻故障下DFIG定子磁链的解析表达式;利用坐标分解方式研究了定子磁链稳态响应与故障时刻的关系;通过分析定子磁链直流分量的大小,研究了定子磁链自由响应与故障时刻的关系。结果表明,定子磁链稳态响应与故障时刻无关,且其大小随故障时刻的变化呈现2倍工频周期的变化规律。最后通过搭建Matlab/Simulink模型仿真验证了推导公式的准确性和理论分析的正确性,为DFIG低电压穿越时转子侧的控制策略提供了一定的理论依据。In order to study the relationship between the complete response of doubly-fed induction generator（DFIG）stator flux and the grid fault time,this paper derived the dynamic-analytical expressions of the DFIG stator flux under voltage faults starting at anytime,which is based on space vector.The coordinates decomposition was used to study the relationship between the steady state response of the stator flux and fault time.The relationship between the stator flux DC response and fault time was studied by analyzing the magnitude of the DC component of the stator flux.The results show that the steady state response of the stator flux has nothing to do with the fault time and the amplitude of DC response of the stator flux varies from zero up to twice the amplitude of the power grid frequency.A series of simulations were conducted in the Matlab/Simulink platform.The simulation results were in good agreement with those obtained theoretically and validate the proposed analysis.

关 键 词：双馈风力发电机 电网故障 定子磁链全响应 任意时刻 

分 类 号：TM761[电气工程—电力系统及自动化]