中文摘要：

采用解耦控制策略的并网型电压源型换流器（VSC）得到了广泛应用。为了获得一种外环比例积分（PI）控制器参数优化的适用性方法,构建了VSC传递函数解耦整定模型,并在PI控制器初始参数基础上,针对时间乘绝对误差积分（ITAE）目标,采用差分进化算法进行了参数优化计算。结果表明：将内环结构合并到VSC的一阶惯性模型中,简化后有利于构建合理适用的解耦整定模型;对应不同的VSC有功和无功控制方式,该整定模型可分为有功类模型和无功类模型;针对各种VSC运行控制方式,通过相应的解耦整定模型,可分别优化出有功和无功最优控制参数;该参数组合对于整个VSC也是近似最优的。

英文摘要：

Grid-connected VSC （voltage source converter） with decoupling control strategy has been widely used. In order to obtain optimized controller parameters of outer loop, we established a series of decoupling models of transfer function, and calculated the optimized parameters using the differential evolution algorithms based on the PI controller＇s initial parameters and the ITAE （integral of time multiplied by the absolute value of error） criteria. The results indicate that it is feasible and convenient to simplify and integrate the inner loop into the first-order inertia model of VSC to establish ideal decoupling models. The models can be classified into active power and reactive power categories according to VSC＇s control modes, using which the controlling parameters can be optimized for active/reactive modes, and these results are also approximately optimized for the whole VSC system.