基于瞬时电压矢量定向的有源电力滤波器补偿电流检测

结合电力系统无功补偿与谐波治理的基本原则,对基于瞬时无功功率理论的传统谐波电流检测方法在有源电力滤波器中的应用进行了简要分析,进而提出了以电网电压为参考基准,以实现各种非线性负载及阻感、阻容性负载向纯电阻性负载转换为目的的负载电流波形和相位治理原则,并详细阐述了基于瞬时电压矢量定向的补偿电流检测方法。该方法克服了传统方法在电网电压畸变时补偿后电流不能跟随电网电压波形的不足,避免了有源电力滤波器补偿电流过大及畸变无功功率倒送电网现象的出现,同时该方法具有频率自动跟踪、相序自适应等特点。最后,通过仿真和样机试验验证了该补偿电流检测方法的优越性。

A Novel Compensation Current Detection Method for APF Based on Transient Voltage Space Vector Orientation

Based on the principle of reactive power compensation and harmonic control in power system,the application of the traditional harmonic current detection method based on instantaneous reactive power theory is briefly analyzed,and then the principle of load current waveform and phase control is proposed to achieve a variety of nonlinear,inductive,resistive capacitive load conversion to pure resistive load.what′s more,a new method of compensation current detection based on instantaneous voltage vector orientation is described in detail.The new method overcomes the shortcomings of the traditional method that the current can′t follow the grid voltage waveform when the power system voltage distortion is compensated,and averts the phenomenon that the compensation current is too large and the distortion reactive power is sent back to the grid.Meanwhile the method has the advantages of automatic frequency trace and phase sequence self-adaptation.Finally,The superiority of the new method is verified by the simulation and the prototype experiment.