In order to uncover the characteristics and reduce the risk of high frequency resonance in distribution network with multiple voltage source converters(VSC)

a novel approach to analyzing the high frequency resonance characteristics of distribution network with multiple VSCs is presented. Firstly

high order harmonic equivalent circuits of VSC are set up based on the harmonic analysis model with dynamic phasor sequence components(DPSCs). Thus the high frequency equivalent circuit model of the distribution network is obtained. Secondly

the port equivalent impedance of system and that of VSC are deduced

respectively. By analyzing the frequency characteristics of the port equivalent impedance

the high frequency resonance characteristics of distribution network with multiple VSCs can be derived. Thirdly

the high frequency resonance characteristics of different quantities of VSC integrated and configurations of the filters are analyzed. Finally

a simulation model for the distribution network with multiple VSCs is developed to testify the validity of the results. There is obvious high frequency resonance in the distribution network with multiple VSCs. The impact of the quantity integrated and the configurations of the filters on the resonance frequency is significant. Only by specifying the switch frequency and designation of filters of VSC

it will be possible to reduce the risk of the high frequency resonance in distribution network with multiple VSCs.