基于电压源换流器的HVDC系统稳态控制及仿真

In this paper, the mathematical model and its active and reactive power independent control strategy of VSC-HVDC system is studied. According to the character that voltage source converter has two degrees of freedom for control, 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. At last the controller based on the steady-state mathematical model is designed, and simulation is performed by using the PSCAD/EMTDC. The simulation results testify the good performance of the designed controller, which can be used in the experiment system.