摘要
针对现有检测方法在三相电压不对称或畸变时存在的一些缺陷,提出了一种新的同步坐标变换的检测方法。它能实时检测出不对称三相电路中的基波正序有功电流以及无功电流与不对称分量、谐波电流的和,从而可直接应用于三相三线制或三相四线制系统的综合补偿。该检测方法无需对三相电压进行锁相和滤波,避免了由此带来的检测误差。理论推导和仿真结果验证了所提方法的正确性。
In view of the limitation in detecting asymmetric or aberrant three-phase voltage, a new detecting method based on synchronous coordinate transformation is put forward. With this method, the sum of fundamental positive sequence active/reactive currents, asymmetric component and harmonic current may be real-timely detected and directly used for the comprehensive compensation of three-phase three-wire or four-wire systems. Especially, there is no need to do phase-lock and filter, thus to avoid the detecting errors from these operations. The theoretical deduction and simulation result proves correctness of the method.
出处
《煤矿机电》
2008年第3期81-83,86,共4页
Colliery Mechanical & Electrical Technology
关键词
检测原理
不对称系统
有源滤波器
综合补偿
detecting principle
asymmetric system
active filter
comprehensive compensation
