Design of Low-Resonance Fast Response DC Filter for Enhancing Voltage Quality of DC Distribution Network

A bidirectional filter with low ripple and fast response is designed to solve the problem of low frequency fluctuating in DC distribution network of DC side. Firstly, the matched filter design method is used to optimize the filter order and passband frequency. After that, the voltage transfer function of DC side filter network is derived and its voltage transfer characteristic is analyzed. For the resonance problem of the filter network, the parameter selection method of suppressing the peak value of the resonance point is given, and the effect of actual parameter deviation is further analyzed. The simulation model of double-ended and single-ended radiation DC distribution network was built in MATLAB/Simulink, and the experimental platform of single-ended DC distribution network was established.

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