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讨论了已实现的 ＵＰＦＣ物理模型中 ＳＰＷＭ技术存在的问题，介绍了消除谐波常用的优化消 谐 ＰＷＭ算法的原理及求解方法，利用 ＵＰＦＣ换流器结构特点，对该算法进行简化并进行了初值选择研究，给出了一种在线快速求解非线性方程组的方法，为该方法在ＵＰＦＣ物理模型中的应用奠定 了基础。
The existing problems of SPWM technique in UPFC physical model are discussed. The principle and solving method of harmonic elimination PWM algorithm which is commonly used to eliminate harmonics are introduced. By taking advantage of the structural characteristics of UPFC converter, the algorithm is simplified and initialized This paper presents a method for solving nonlinear equations on-line quickly, which lays the foundation for its application in UPFC physical model.