摘要
双馈感应发电机的结构有别于传统的同步和异步电机,其暂态特性及故障反应机理的研究不够深入。基于状态转移矩阵,通过以磁链为状态变量对电机稳态模型和以控制策略为基础的转子变换器暂态等效模型,整体求解及分析其解的特征。解析得出,状态变量系数分为4个区域,正对角区域决定状态变量解的频率和衰减时间常数,反对角2个区域同时不为0时对频率和衰减时间造成偏移,否则,没有影响。暂态模型相应改变区域下方两个区域,对频率和衰减时间常数造成影响。
The structure of doubly-fed induction generator （DFIG） is different from those of the traditional synchronous and asynchronous generators, and the research on the transient characteristics and fault mechanism is also not deep enough. Based on state transformation matrix, the stable model of DFIG with fluxes as state variables and the transient equivalent model of rotor converter with control strategy as its basis are solved, and the characteristics of the corresponding solutions are analyzed. It can be seen that the state variable coefficients can be divided into four regions. The frequencies and attenuation time constants of the solutions are determined by the positive diagonal region. If the two regions that are against diagonal are not zero at the same time, the frequency and attenuation time will be migrated ; otherwise, there is no impact. The transient equivalent model changes the two lower regions correspondingly, resulting in an impact on the frequency and attenuation time constant.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2017年第11期117-122,共6页
Proceedings of the CSU-EPSA
关键词
双馈感应发电机
短路计算
状态转移矩阵
转子变换器
doubly-fed induction generator
short-circuit calculation
state transformation matrix
rotor converter
