摘要
三相三线制的有源电力滤波器(Active power filter,APF)中,采用ip-iq算法检测谐波具有很好的适用性。但在三相四线不对称电路中,需要考虑零序分量的存在,以避免其对检测结果造成影响。本文分析了零序分量在三相四线不对称电路中对ip-iq算法的影响,及不同滤波器谐波检测动态响应的效果,并通过仿真验证了在三相四线不对称电路中无需提前剔除零序分量,采用平均值滤波器可以提高谐波检测和分离基波正序的响应速度和精确度。
ip-iq algorithm is suitable for detecting harmonic in active power filters （APF） which are used in three-phase three- wire system. However, the zero sequence component needs to be considered in order to avoid its influence to harmonic detection in asymmetric three-phase four-wire system. First, this paper theoretically analyzes the influence to ip-iq algorithm by zero sequence component in asymmetric three-phase four-wire system. Then the dynamic response effects of harmonic detection using different types of filters are also analyzed. It is validated by simulation that there is no need to reject zero sequencecomponent in advance and adopting average filter can improve the response speed and accuracy of harmonic detection while separating fundamental positive sequence.
出处
《电源世界》
2015年第9期21-25,33,共6页
The World of Power Supply
