Abstract：The twelve-pulse inductive filtering technology can effectively solve power quality problems such as harmonic pollution, poor power factor, etc., in energy-intensive enterprises. However, due to the variation of grid impedance and the mismatching parameters between new converter transformer and its inductive filtering devices, low-order harmonic currents in the supply current might be amplified in a practical engineering application, which endangers the filter performance and the safe operation of inductive filtering system. In this paper, the mechanism of harmonic amplification is analyzed and the mathematical model of system harmonic is established. Then, two solution schemes, that are adopting hybrid active filter and optimized pure passive filters, are presented. The later scheme has been applied in an electrolytic aluminum enterprise, which is effective to solve the phenomena of the harmonic enlargement of low order harmonic currents. The simulation and the engineering test results validate the correctness of theoretical analysis.
刘文业, 罗隆福, 李勇, 张志文, 黄肇. 基于感应滤波的工业整流系统潜在谐波放大及防治措施[J]. 电工技术学报, 2014, 29(2): 304-317.
Liu Wenye, Luo Longfu, Li Yong, Zhang Zhiwen, Huang Zhao. Potential Harmonic Amplification and Its Prevention of Industrial Rectifier System Based on Inductive Filtering Method. Transactions of China Electrotechnical Society, 2014, 29(2): 304-317.
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