级联H桥变换器主动热控制下的谐波性能优化  

Harmonic performance optimization for cascaded H-bridge converter under active thermal control

作　　者：戴攀 邹波 陈家乾 朱小军 叶承晋[4] Dai Pan;Zou Bo;Chen Jiaqian;Zhu Xiaojun;Ye Chengjin(Research Institute of Economics and Technology,State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310000,China;Huzhou Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Huzhou 313000,China;State Grid Zhejiang Fuyang District Power Supply Company,Hangzhou 311400,China;School of Electrical Engineering,Zhejiang University,Hangzhou 310063,China)

机构地区：[1]国网浙江省电力有限公司经济技术研究院,杭州310000 [2]国网浙江省电力有限公司湖州供电公司,湖州313000 [3]国网浙江省杭州市富阳区供电公司,杭州311400 [4]浙江大学电气工程学院,杭州310063

出　　处：《电子测量技术》2021年第14期84-90,共7页Electronic Measurement Technology

基　　金：国家自然科学基金青年项目(51807173);中央高校基本科研业务费专项资金项目(2021QNA4012)资助。

摘　　要：针对级联H桥变换器主动热控制下不平衡运行时,钳位H桥模块在两倍载波频率附近产生大量谐波的问题,提出了一种级联H桥变换器主动热控制下的谐波性能优化策略。深入分析了变换器中钳位H桥模块热控制下输出电压的谐波失真,设计了基于H桥模块载波角来修正非常规PSPWM以消除了两倍载波频率边带谐波。利用级联H桥变换器样机开展了实验,测试结果为,采用谐波性能优化控制后,两倍载波频率附近主导谐波被消除,同时钳位H桥模块温度降低0.9℃。测试结果表明,主动热控制下的新型谐波性能优化策略可有效提高级联H桥变换器系统输出谐波性能,并实现H桥模块热均衡。When the cascaded H-bridge converter operates unbalanced under active thermal control,the clamping H-bridge module generates a large number of harmonics around twice the carrier frequency.Aiming at this problem,a harmonic performance optimization strategy under active thermal control of the cascaded H-bridge converter is proposed.The harmonic distortion of the converter output voltage with the clamped H-bridge module under thermal control is analyzed in-depth,and an unconventional PSPWM based on the carrier angles correction of the H-bridge module is designed to eliminate the sideband harmonics of the double carrier frequency.Experiments were carried out using a prototype of the cascaded H-bridge converter,and the test result is that after adopting the harmonic performance optimization control,the dominant harmonics around twice the carrier frequency were eliminated,and the temperature of the clamping H-bridge module was reduced by 0.9℃.The test results show that the novel harmonic performance optimization strategy under the active thermal control can effectively improve the output harmonic performance of the cascaded H-bridge converter system and realize the thermal equilibrium of the H-bridge modules.

关 键 词：级联H桥变换器 多电平 不连续脉宽调制 谐波分析 

分 类 号：TM46[电气工程—电器]