维也纳拓扑在断续空间矢量调制下开关序列切换优化  

Optimization of Switching Between Switching Sequences in Vienna Topology under Discontinuous Space-vector Modulation

作　　者：赵裕昊 吕征宇[1] 姚文熙[1] ZHAO Yuhao;LV Zhengyu;YAO Wenxi(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电源学报》2023年第5期16-25,共10页Journal of Power Supply

摘　　要：维也纳拓扑的可用空间矢量受电流影响的特性,使得断续空间矢量调制开关序列切换时的衔接问题变得严重。为了探明衔接问题的机理并降低其影响,首先分析在电流不变向时开关序列切换的可能情况,推导计算了在电流变向时因为理想扇区和实际扇区间的滞后超前偏差导致的矢量合成误差,进而给出在切换前后选择特定开关序列的优化策略;然后对目前常见的断续矢量调制方案的衔接情况进行分析,并结合优化策略给出优化方案;最后,通过仿真和实验验证了优化方案可以实现平滑的开关序列衔接,且实现算法简单,具有一定的实用性。The available space-vector of a Vienna topology is affected by current,which makes the connection problem during the switching between switching sequences under discontinuous space-vector modulation become more serious.To explore the mechanism of connection problems and reduce their impact,the possible situation under the switching between switching sequences when current does not change is analyzed at first.Then,the vector synthesis error caused by the lag or lead deviation between the ideal and actual sectors when current changes is deduced.On this basis,an optimization strategy for selecting a specific switching sequence before and after switching is given.In addition,the connection problems in several common discontinuous vector modulation schemes are analyzed,and an optimization scheme is given in combination with the proposed optimization strategy.Finally,simulation and experimental results verify that the optimized scheme can achieve a smooth connection of switching sequences,and the corresponding optimization strategy is simple to implement and has certain practicability.

关 键 词：维也纳拓扑 断续空间矢量调制 开关损耗 开关序列衔接 过零电流畸变 矢量合成偏差 

分 类 号：TM46[电气工程—电器]