一种新型等效无限长有源电力滤波器

A NOVEL EQUIVALENT INFINITE ACTIVE POWER FILTER

针对射线型配电网中的谐波传播放大现象提出一种可在任意位置安装的新型等效无限长有源电力滤波器(I-APF)。该新型I-APF基于受控电压源和受控电流源的组合模型,实现了对谐波模拟无限长配电网,可有效抑制谐波传播放大。该新型I-APF不仅对配电网末端负载情况有很强的适应性,在末端接任意负载时都能取得很好的谐波抑制效果;而且安装位置灵活,在配电网始端的位置可有效衰减整个配电网中的谐波。仿真结果和实验结果均已验证该新型I-APF的有效性和优越性。

The harmonic resonance between power-factor correction capacitors and system inductors might result in harmonic propagation amplification,which aggravates the harmonic pollution and reduces the power quality. Aiming at the harmonic propagation amplification in a radial power distribution feeder,this paper proposed a novel equivalent infinite active power filter(I-APF)based on the unitized model of a controlled voltage source and a controlled current source. The novel equivalent I-APF mimics the approximate infinitely long power distribution feeder at harmonic frequencies and damps out the harmonic propagation effectively. Moreover,the novel equivalent I-APF has great adaptability of the load condition on the end of the feeder,because it can achieve harmonic suppression with regard to an arbitrary load on the end. And the installation site of the novel equivalent I-APF is flexible. When the novel equivalent I-APF is installed on the beginning of the feeder,the harmonics along the whole feeder could be attenuated effectively.Simulation and experimental results validate the effectiveness and the superiority of the novel I-APF.