A Method of the Design of DPFC System Parameters

摘要

A Distributed Power Flow Controller device is designed in this paper. The series and shunt converter capacity are determined by the variation range of the transmission power flow. The maximum amplitude of the fundamental frequency voltage generated by the series converters, the current flowing through the series converters, the current and voltage injected into power system by the shunt converter are all determined, according to its power model and the power conservation law. The DC capacitor voltage and the converter switch parameters are determined in accordance with the relationship between the input and output voltages of the converters. In addition, a simulation model of the Distributed Power Flow Controller installed to a power transmission system is built in PSCAD/EMTDC and the results verified the correctness of the design method presented in the paper.