Through suita-bly selecting the control variables of the DC subsystem and reasonably treating the converter equations, the DC network calculation and the AC network calculation are completed independently, and so are the corresponding Lambdas.

• 适当地选取直流系统控制变量以及妥善处理换流器转换方程,不仅可以使直流网络方程与交流网络方程解耦,而且可以使拉格朗日乘子也相应地解耦。