风电场并网用VSC-HVDC的无源控制策略

摘要

Based on the Port-Controlled Hamilton with Dissipation (PCHD) model of the grid-connected VSC-HVDC system, a new passive control strategy of Voltage Sourced Converter based on interconnection and damping configuration(IDA-PBC) is proposed. The scheme makes the VSC model equivalent to a dissipative passive system, and the dissipative passivity of the system is also verified. Based on different control modes of VSC-HVDC, reference currents are determined. On the basis, passive controllers are designed by IDA-PBC to trace reference currents and achieve independent regulation of active and reactive power. The simulation results show that the passive controller provides a novel high performance control solution to VSC-HVDC systems for grid connection of wind farms.%　　针对风电场并网轻型高压直流（VSC-HVDC）输电系统，采用端口受控耗散哈密顿系统（PCHD）模型，设计了一种基于互联与阻尼配置的无源控制方法。该方法将轻型高压直流输电的换流站模型等效成一个具有耗散性质的无源系统，并做出理论与实验验证。根据VSC-HVDC的不同控制方式，确定相应的外环电流参考值。在此基础上，通过互联与阻尼配置的方法设计无源控制器，追踪参考电流，实现有功功率、无功功率的独立调节。仿真结果表明了无源控制策略为风电场的VSC-HVDC并网控制提供了一种新的高性能的解决方案。