摘要
本文将柔性直流输电系统（HVDCFlexible）应用在孤立电网，针对孤立电网易发生不对称故障以及扰动下孤网侧暂态稳定性差的特点，提出了输入输出反馈线性化和负序电压补偿的综合控制策略，应用PSCAD建立了柔性直流输电的仿真模型。仿真结果表明采用输入输出反馈线性化和负序电压补偿的综合控制策略能较好的减小孤立电网不对称故障对HVDCFlexible的影响，提高孤立电网的稳定性。
In this paper the HVDC Flexible is used in isolated grid, for the isolated grid occur asymmetric fault Easily and the characteristics of the poor transient stability, input-output feedback linearization and negative sequence voltage compensation control strategy are proposed, the HVDC Flexible simulation models are set up by PSCAD/EMTDC. Simulation results show that the nonlin- ear control and the negative sequence voltage compensation control strategy can better reduce the impact of isolated grid on Asymmetric power of HVDC Flexible and improve the recovery of isolated grid stability.
