摘要
主要对柔性直流输电系统的控制策略进行了研究。首先对柔性直流输电系统主从控制、电压裕度控制和直流电压下垂控制的控制原理及特点进行详细的介绍,并在此基础上,提出了一种协调控制策略,该策略综合三种控制方式并加入裕度思想分层协调各换流站,能够适应较大范围的不平衡功率,避免换流站过载的现象。最后,在Matlab/simulink平台上构建了多端柔性直流输电模型,分别仿真验证了所提控制策略的有效性。对于深入了解柔性直流输电系统的控制的原理具有重要的理论意义,也可为采用下垂控制的柔性直流输电系统设计提供理论依据。
This paper mainly conducts a study on the control strategy of VSC-HVDC transmission system. Firstly,the principles and features of master-slave control,voltage margin control and DC voltage droop control of VSC-HVDC system were detailedly introduced. Then,the paper proposed a coordinated control strategy composed of the above three control ways and margin concept to hierarchically coordinate all convertor stations,which can adapt to wide-range unbalanced power and avoid overload problem. Finally,VSC-MTDC model was established in the Matlab/simulink platform and the simulation analysis verified the availability of the proposed control strategy. This paper is of important theoretical significance for the deeper understanding of the control principle of the VSC-HVDC system,and can provide a theoretical basis for the design of VSC-HVDC transmission system adopting droop control.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2017年第6期41-46,53,共7页
Journal of North China Electric Power University：Natural Science Edition
