基于直接交交变换技术的单相有源滤波器分析  

Analysis of Single-phase Active Power Filter Based on Direct AC/AC Conversion Technique

作　　者：管月[1] 李磊[1] 陆佳炜 GUAN Yue;LI Lei;LU Jiawei(School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学自动化学院

出　　处：《电力系统自动化》2020年第2期207-214,共8页Automation of Electric Power Systems

基　　金：江苏省自然科学基金资助项目（BK20161499）~~

摘　　要：应用逆变技术的传统有源滤波器需要采用电解电容器组进行储能,具有体积大、价格高且可靠性低等缺点。针对这一问题,文中研究了一种无需直流储能单元的单相交交型有源滤波器。介绍了基于偶次谐波调制技术的无功和谐波综合补偿原理,采用傅里叶级数法和数据拟合方法得到了占空比中各偶次调制项与补偿电流中各奇次分量之间的频率、数量对应关系。针对偶次调制波耦合控制的问题,提出了一种解耦调制策略,使得系统补偿精度和稳定性提高,设计了单相综合补偿方案,仿真和实验结果验证了理论分析的正确性和所提方案的可行性。The traditional active power filter(APF) using inverter technology needs to use electrolytic capacitor bank for energy storage, which has the disadvantages of large size, high price and low reliability. To solve this problem, this paper focuses on the single-phase AC/AC-type APF without DC energy storage unit. The principle of reactive power and harmonic comprehensive compensation based on even-order harmonic modulation(EHM) technology is introduced. The Fourier series method and data fitting method are used to obtain the relationship of frequency and quantity between each even-order modulation term in the duty cycle and odd-order components in the compensation current. A decoupling modulation strategy is proposed for the coupling control of even-order modulation wave, which improves the compensation accuracy and stability of the system. A single-phase comprehensive compensation scheme is designed, and the simulation and experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed strategy.

关 键 词：有源滤波器 直接交交变换技术 偶次谐波调制 解耦调制 

分 类 号：TN713.8[电子电信—电路与系统]