论文部分内容阅读
针对基于瞬时无功理论的传统有源滤波器在三相四线制电路中不适用,简要分析了有源滤波和瞬时无功理论,综合运用瞬时无功理论中的p-q方法和ip-iq方法,提出了一种基于瞬时无功理论的新的有效的三相四线制谐波检测新方法,完善了p-q方法和ip-iq方法的不足,通过计算验证了该方法适用于任何三相电路,包括三相四线制电路,并且三相电压波形的畸变不影响检测结果的准确性。在MATLAB环境下建立了该谐波检测新方法的模型,通过仿真验证了该方法的准确性和有效性。该方法有效的解决了传统有源滤波器不适用于三相四线制电路的缺陷。
The traditional active filter based on instantaneous reactive power theory is not suitable for three-phase four-wire system. The active filtering and instantaneous reactive power theory are briefly analyzed. The pq method and ip-iq method in instantaneous reactive power theory , A new effective three-phase four-wire harmonic detection method based on instantaneous reactive power theory is proposed. The deficiencies of pq method and ip-iq method are improved. The calculation results show that the method is suitable for any three-phase circuit , Including three-phase four-wire circuit, and three-phase voltage waveform distortion does not affect the accuracy of test results. The new harmonic detection method is established in MATLAB environment. The simulation results show the accuracy and effectiveness of the method. The method effectively solves the defects that traditional active filters are not suitable for three-phase four-wire system.