电测与仪表2017，Vol.54Issue(22)：48-53,110,7.
VSC-HVDC互联系统的改进前馈控制策略
An improved feedforward control strategy for interconnected VSC-HVDC tran smission system
摘要
Abstract
In order to improve the dynamic response speed and its tracing performance with the target value in the VSC-HVDC transmission system, aimed at the constant DC voltage control method and constant active power of the system, this paper proposes the corresponding improved feedforward control strategy on the basis of the traditional di -rect current control controlled by the double closed loop decoupling control strategy .In the constant active power control of rectifier side, a predictive signal is added to the inner current loop on the basis of the outer voltage loop to en -hance the response speed of the system and compensate the hysteresis nature of the feedback signal .In the DC voltage control of inverter side, in order to increase the anti-interference performance of the DC voltage to the outside , an improved feedforward control strategy adopts the system voltage and DC current signal is introduced so that the DC volt -age has a strong resistance to the external disturbance .Finally, a two-terminal VSC-HVDC model is built in PSACD / EMTDC, simulations and analyses are carried out in the system under different operating conditions .The results show that the improved feedforward control strategy has a good value that fits to the target value , and the good robustness and rigidity of DC voltage also have obtained to the external disturbance .关键词
响应速度/跟随性/解耦/前馈控制策略/鲁棒性/抗扰性Key words
response speed/following behaviors/decoupling/feedforward control strategy/robustness/noise immunity分类
信息技术与安全科学引用本文复制引用
邓旗,张英敏,李兴源..VSC-HVDC互联系统的改进前馈控制策略[J].电测与仪表,2017,54(22):48-53,110,7.
