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通过对dq0坐标系下电压源换流器模型的分析,得到了电压源换流器增广被控对象的状态空间方程。利用H∞控制理论,设计了基于电压源换流器的高压直流输电系统的定直流电压、定直流功率、定无功功率控制器。根据MATLAB建立的仿真模型,对上述控制器进行了仿真实验。仿真结果表明,所设计的H∞控制器具有良好的控制性能,达到了设计要求。
Through the analysis of voltage source converter model in dq0 coordinate system, the state space equation of augmented controlled voltage source converter is obtained. Using H∞ control theory, the DC voltage, constant DC power and reactive power controller are designed based on the voltage source converter. According to the simulation model established by MATLAB, the above controller is simulated. The simulation results show that the designed H∞ controller has good control performance and meets the design requirements.