基于电压源换流器HVDC系统稳态控制及仿真

对基于电压源换流器的直流输电(VSC-HVDC)系统的数学模型和有功、无功功率独立控制策略进行了研究。根据VSC具有2个控制自由度的特点，导出了VSC-HVDC系统的稳态数学模型．并根据相对灵敏度的概念确定了VSC-HVDC系统两端换流站的4个被控变量与相应控制变量之间的对应关系．在此基础上设计了基于VSC-HVDC稳态模型的控制器。仿真结果表明所设计的控制器具有良好的控制性能．为硬件实验模型的建立提供了理论指导。

Steady-state control strategy and simulation of VSC-HVDC

The mathematical model and the active and reactive power independent control strategy of VSC - HVDC system is studied. According to the character that the voltage source converter has two control freedom degrees,the steady-state mathematical model is deduced,and the relationship between four controlled variables and their corresponding controlling variables are determined based on the concept of relative sensitivity,based on which the controller is designed. The simulation results verify its good performance,which provides theoretical guidance for the establishment of experimental system.