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中文摘要：
为解决传统七段法空间矢量脉宽调制（SVPWM）在高电平电力逆变器中应用受限的问题,该文提出了一种优化开关系统算法,即三段法SVPWM算法。优化算法采用了一种新型三角形划分法和60°坐标系。分析了附加开关的产生原因、最小化机理,详细表述了三段法开关序列的设计步骤并辅以实例。与传统七段法相比,三段法开关序列设计灵活,可最小化器件开关频率,降低开关损耗。在五电平级联型逆变器上对该调制策略进行了仿真研究,结果验证了该法的有效性和优越性。
英文摘要：
A novel optimal switching systems algorithm, referred to as 3-segment space vector pulse width modulation （SVPWM）, was developed to solve the problem that the traditional 7-segment SVPWM is limited largely in high-level electric inverters application. The optimal algorithm adopts a novel triangular dividing method and 60°coordinate system. The cause and minimization principle of additional switching were analyzed. The design steps of 3-segment switching sequence were given detailedly with some examples. In contrast to that of 7-segment SVPWM, the switching sequence design of the proposed 3-segment SVPWM is more flexible, and it could minimize the switching frequency, decreasing switching loss. The proposed modulation strategy was simulated on a 5-level cascaded H-bridge inverter. Simulation results verified its validity and superiority.
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