基于Simplex算法的VSC-HVDC控制参数优化

Control parameter optimization based on Simplex algorithm for VSC-HVDC

以电压源换流器高压直流输电(VSC-HVDC)的稳态模型为基础,根据VSC功率传输方程的直角坐标形式,采用逆系统方法和PI控制相结合的方法设计了VSC的有功功率和无功功率独立调节的VSC-HVDC控制系统。基于非线性单纯形Simplex算法,对PI控制参数进行优化。PSCAD/EMTDC下的仿真结果表明,通过参数优化,VSC-HVDC控制目标的最大误差百分比低于1.5%;同时也证明所设计的控制系统能独立控制有功功率和无功功率。

According to the rectangular coordinates form of VSC’s power transmission equations,a VSC-HVDC（Voltage Source Converter based High Voltage Direct Current transmission） control system combined with the inverse system method and PI control is designed based on its steady state model,which regulates the active power and reactive power individually.The PI control parameters are optimized by Simplex algorithm.Simulations with PSCAD/EMTDC show that,with the optimized parameters,the maximum error percentage of VSC-HVDC control objectives is less than 1.5 % and the active and reactive power can be controlled respectively.