近海风电场并网用多端口VSC-HVDC系统的无差拍协同控制策略

摘要

This paper develops feasible topologies of VSC-HVDC system for interconnecting off-shore wind farms,and proposes the corresponding deadbeat control based synergy strategy for multi-terminal VSC-HVDC systems.The proposed control scheme,is easy for design,consumes less computation time,and yields high tracking accuracy and fast dynamic response.A case of 4-terminal VSC-HVDC system is developed in Matlab/Simulink to demonstrate the validity of the proposed scheme.Simulation results show that the proposed scheme may enable optimal integration of off-shore wind farms with grids.%探讨了近海风电场用基于电压源换流器的高压直流输电系统（VSC-HVDC）的几种并网拓扑,针对多端口VSC-HVDC系统提出了基于无差拍控制方法的协同控制策略,该控制策略具有原理简明、算法简单、参数定义明确、跟踪精度高及动态响应速度快等优点。为了验证本文所提出方案的可行性,利用Matlab/Simulink构建了一个近海风电场的四端口VSC-HVDC并网传输系统,并进行了系列仿真研究。仿真结果表明,本文所提出的多端口VSC-HVDC并网传输协同控制方案可为近海大规模风电场的并网传输提供优化灵活的解决方案。