新型注入式混合有源滤波器的开关谐波抑制技术研究

Research on Switch Ripples Eliminating Technology for New Injection Type Hybrid Active Power Filter

有源滤波器能否按工作原理实现预期的谐波抑制效果,很大程度上取决于对其开关谐波的有效抑制程度。本文以一种新型注入式混合有源滤波器为研究对象,通过采用三重开关谐波抑制技术:采取复合型电流跟踪控制算法、选用基于随机脉冲位置的SVPWM调制策略、安装优化设计得到的输出滤波器,实现了工程应用项目所提出的开关谐波抑制目标。其分析方法及结论可为其他类型混合有源滤波器的开关谐波抑制研究提供借鉴。

Whether the hybrid active power filter could or not get desirable effect Of eliminating harmonics in the power network, it mainly depends on the effective eliminating of switching ripples caused by the active power inverter. Taking a new injection type hybrid active power filter as an example, this paper proposes a new technology for eliminating switching ripples with adopting the synthesis control algorithm for current tracking, attaching the SVPWM based on random PWM and installing the output filter designed optimally. With this new technology, The method for theoretical analysis and relative conclusion can be used as reference for other type hybrid active power filters to eliminate switching ripples.