中文摘要：

针对电力系统配电网背景谐波放大现象,分析射线形配电网上谐波放大的原因.分析表明,当传输线足够长,系统不存在谐波放大现象.因此通过控制安装在末端的有源滤波器,等效延长配电线线路的长度,从而达到抑制整条线路谐波放大的目的.和传统的末端安装固定增益阻性有源滤波器相比,该方案在线路特征阻抗变化时依然能抑制整条线路的谐波放大,从根本上避免了＆quot;打鼹鼠＆quot;现象.

英文摘要：

Aiming at the harmonic magnification phenomenon in power distribution networks, the reason for harmonic magnification in the radial power distribution networks was analyzed. The analyses indicate that there exists no harmonic magnification throughout the line if the feeder is long enough. Therefore the harmonic propagation along the feeder can be damped by controlling the active filter which is installed at the end of the feeder to extend the feeder length equivalently. Comparing with the traditional resistance active power filter （RAPF） whose conductance gain is constant and which is deployed on the end bus, the proposed strategy can depress harmonic magnification throughout the whole line even when the system characteristic impedance varies to prevent the so-called ＂whack a mole＂ phenomenon completely.