Design and Performance of an Adaptive Low-DC-Voltage-Controlled LC-Hybrid Active Power Filter With a Neutral Inductor in Three-Phase Four-Wire Power Systems. - Chi-Seng Lam; Man-Chung Wong; Wai-Hei Choi; Xiao-Xi Cui; Hong-Ming Mei; Jian-Zheng Liu (IEEE Trans. Ind. Electron., 2014)