基于VSC-HVDC的风电场并网系统稳态分析方法

Flexible HVDC system is very suitable for offshore wind farm grid, but when using traditional ac-dc power flow algorithm to calculate the power flow of Grid-connected wind farm based on VSC-HVDC, once removing the dc system, the wind farm becomes isolated communication node, caused the Jacobi matrix of communication system irreversible, iterative process can't be continued. Aimed at these defects, this paper based on the dc system network equation and VSC control way to realize ac/dc subsystem completely decoupled, then combined with wind farm operation mode respectively calculate the power flow of ac subsystem and dc subsystem; This algorithm has simple model, can fully inherit the existing pure dc power flow program, programming workload is small, high speed.