非理想电网电压情况下有源电力滤波器补偿电流检测技术研究  

Research on Compensation Current Detection Technology of Active Power Filter in Non-ideal Voltage of Electrified Wire Netting

作　　者：王璐[1] 唐杰[1] 耿运涛[1] 

机构地区：[1]邵阳学院,湖南邵阳422000

出　　处：《仪表技术》2014年第12期19-24,共6页Instrumentation Technology

摘　　要：有源电力滤波器(Active Power Filter,APF)补偿电流检测环节对其补偿性能有着重要的影响。三相电网电压不对称且畸变时,传统的p-q法和ip-iq法无法准确实现对负荷综合补偿。采用基于同步旋转坐标系法实现对基波正序有功分量的提取,在电网电压畸变时,增设一种基于低通滤波器的基波正序电压提取电路,该检测方法避免了传统锁相环对检测相位的误差,能够准确实现负载的综合补偿。同步旋转坐标系法即为将负荷电流合成矢量投影到电网电压合成矢量上,与其同频同相的电流即为基波正序有功电流分量,从而得到谐波、负序和无功分量,实现对负荷的综合补偿。最后给出了基于Fdatool(Filter Design&Analysis Tool)工具箱低通滤波器详细的设计方法。理论分析和仿真结果证明所提检测方法的正确性和有效性。The detection of compensation current has an important impact on the performance of active power filter. The traditional method of p-q and ip-iq can not be accurately achieve the load of comprehensive compensation with the unbalanced and distorted three-phase voltage.A detection method of extracting active component of fundamental positive sequence voltage based on synchronous reference frame transformation is adopted in this paper. An extraction circuit is designed based on low-pass filter of fundamental positive sequence voltage with the three-phase voltage distortion.The er- ror of traditional phase-locked loop can be avoided. And it accurately achieves the load of comprehensive compensation through this detection method.The method of synchronous reference frame transformation system projects the load current vector on voltagevector,which can achieve the load of comprehensive compensation.The load current vector projected on voltage vector with the same phase and frequency is the fundamental positive sequence active current component, thereby obtaining harmonics, negative and reactive component.Finally, the design method of low-pass fiheris expounded based on Fdatool（ Filter Design ＆ Analysis Tool）Toolbox in detail.The feasibility and effectiveness of the detection method is verified by the theoretical analysis and simulation results.

关 键 词：有源电力滤波器 不对称且畸变 谐波 低通滤波器 

分 类 号：TN713[电子电信—电路与系统]