摘要
三相交流电源系统在三相静止坐标系下的谐波阻抗参数是对系统进行谐波估计、滤波器设计等谐波分析的重要参数。但在采用基于阻抗的稳定性判据对交流系统进行稳定性分析时,需要得到系统在dq坐标系下的谐波阻抗参数。推导了系统中典型元件在dq坐标系下的谐波阻抗模型;提出了一种改进的基于正弦调制电流注入的交流系统谐波阻抗测量方法;搭建了三相交流系统的仿真模型,并开发了交流系统谐波阻抗测量装置。仿真与实验结果验证了理论分析的正确性与有效性。
The harmonic impedance of system in static three-phase coordinates is the key parameter to estimate the harmonic in system. In the stability analysis of system based on impedance criterion, the harmonic impedance in dq coordinates must be extracted. The harmonic impedance models of typical elements in power system are derived. An improved impedance measurement method based on modulated current injection is proposed. A simulation model of three-phase ac system is developed in PSCAD and an impedance measurement unit is implemented. Both the simulation and experimental results validate the effectiveness of the proposed method.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第8期257-264,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51177130)
台达2011电力电子科教发展计划重点项目(DREK2011002)
关键词
谐波阻抗
测量
正弦调制
电流注入
Harmonic impedance,measurement,modulated current,current injection
