基于序分量提取的无功和谐波电流同步坐标检测方法

为研究无功补偿和谐波抑制的关键技术中的无功、不对称和谐波电流榆测与计算方法,提出基于序分量提取的同步坐标法.研究结果表明:采用无锁相环的广义dq0变换,能准确提取出基波及整数次谐波正、负序以及零序分量:根据不同的无功补偿目标,能准确地检测出基波正序有功电流和基波正序无功电流,分开基波正序无功电流、不对称与谐波电流,实现分别补偿;该法可用于三相三线制和四线制电力系统以及不对称系统;理论推导和仿真结果验证所提方法的正确性.

Synchronous reference frame method for reactive and harmonics currents detection based on sequence component extraction

In order to study the detection method and calculation of reactive power,unbalance and harmonic current,an improved synchronous reference frame method based on sequence component extraction in the time domain was presented.The results show that for the use of general dq0 theory without PLL,the method can accurately extract positive,negative and zero sequence components of both fundamental and integer harmonics,detect fundamental positive sequence active currents and reactive currents,as well as distinguish ...