| 基于p-q-r法的电力系统谐波检测方法 |
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| 引用本文： | 刘开培,陈艳慧,张俊敏.基于p-q-r法的电力系统谐波检测方法[J].中国电机工程学报,2005,25(14):25-29. |
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| 作者姓名： | 刘开培 陈艳慧 张俊敏 |
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| 作者单位： | 武汉大学电气工程学院,湖北省,武汉市,430072 |
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| 基金项目： | 湖北省自然科学基金项目（2003ABA046）. |
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| 摘 要： | 指出只要三相电压、电流对称，无论电压是否有畸变，在三相四线制电路中用p-q-r法检测系统的谐波电流时，ip,iq中只含有3七次谐波（七为整数）。根据重采样理论，在保证ip,iq中的直流分量Ip,Iq的频谱不混叠的情况下可以对ip,iq进行4倍重采样，针对ip,iq中只含有3七次谐波这一特征可以设计均值滤波器，以减小计算量，提高滤波器的动态响应速度。此外，还可以通过控制r轴电流ir将电压畸变时的中线电流补偿到零。
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| 关 键 词： | 电力系统 谐波检测 p-q—r理论 重采样 均值 滤波 |
| 文章编号： | 0258-8013（2005）14-0025-05 |
| 收稿时间： | 2005-01-26 |
| 修稿时间： | 2005年1月26日 |
HARMONIC DECTION METHOD FOR POWER SYSTEM BASED ON p-q-r THEORY |
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| LIU Kai-pei,CHEN Yan-hui,ZHANG Jun-min.HARMONIC DECTION METHOD FOR POWER SYSTEM BASED ON p-q-r THEORY[J].Proceedings of the CSEE,2005,25(14):25-29. |
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| Authors: | LIU Kai-pei CHEN Yan-hui ZHANG Jun-min |
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| Abstract: | This article indicates that ip and iq only contains 3k harmonic (k is a integer) when p-q-r is used in harmonic detection of three-phase four-line system whenever the voltage is distorted or not with the premises that both voltage and circuit are balanced.In accordance with resample theory introduced by article,we can resample ip and iq before the low pass filter to take the direct current Ip,Iq if we assure that their dc component isn't blend together.Since ip and iq only contain 3k harmonic we design a main filter to accelerate the response speed of filter.Besides,compensating ir can reduce the neutral current to zero when voltage is distorted. |
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| Keywords: | Power systems Harmonic detection p-q-r theory Resample Mean filter |
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