吴方法在电力电子逆变器消谐技术中的应用  

APPLICATION OF WU METHOD TO HARMONIC ELIMINATION TECHNIQUES

作　　者：郑春芳[1] 张波[1] 

机构地区：[1]华南理工大学电力学院雅达实验室,广东省广州市510640

出　　处：《中国电机工程学报》2005年第15期40-45,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(60474066)。~~

摘　　要：该文将吴方法引入电力电子逆变器选择性消谐法(SHE)开关角实时求解中。为此,首先在介绍吴方法原理基础上,探讨其在逆变器选择性消谐法中应用的可能性,然后通过建立三相半桥式双极性控制逆变器的消谐模型,提出基于吴方法的双极性控制逆变器开关角实时求解方法。结果表明用吴方法求解消谐模型可以得出消谐模型的全部解。为了实现开关角的实时计算,只需将吴方法计算出的结果拟合成对应于调制比的线性方程组,并用此方程的解作为初值,就可利用牛顿迭代法在线计算开关角。文中用具体算例证明提出方法的正确性。This paper applies the Wu Method to Selective Harmonic Elimination （SHE） technique to calculate the inverter switching angles in real time. Here, the principle of Wu method is introduced and the possibility of using Wu method in SHE technique is discussed firstly. Then by building the harmonic elimination model of a three phase half-bridge bipolar inverter, the method solving the switching angles of two-level control inverter in real time based on Wu method is proposed. The results denote that all solutions of its harmonic model can be solved by Wu method, so the switching angles＇ linear expressions based on the solutions are gained by the fitting theory. Then the initial values of the switching angles can be calculated according to the linear expressions, and the switching angles can be obtained in real time by Newton method. Finally, simulation and experiment results verify the proposed method.

关 键 词：电力电子 吴方法 多项式方程组 选择性谐波消去法 

分 类 号：TM46[电气工程—电器]