| 基于功率反馈的H桥级联型整流器电压平衡控制算法 |
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| 引用本文： | 陶兴华,李永东,孙敏.基于功率反馈的H桥级联型整流器电压平衡控制算法[J].清华大学学报(自然科学版),2011(7). |
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| 作者姓名： | 陶兴华 李永东 孙敏 |
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| 作者单位： | 清华大学电力系统及发电设备控制和仿真国家重点实验室;海军工程大学电气与信息工程学院; |
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| 基金项目： | 清华大学电力系统及发电设备控制和仿真国家重点实验室自主研究项目(SKLD08M03) |
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| 摘 要： | 提出了一种基于功率反馈的直流母线电压平衡算法,用于对H桥级联型(cascaded H-bridge,CHB)脉冲宽度调制(PWM)整流器的电压控制。建立了CHB整流器基于平均意义下的数学模型;通过数学分析得到了各级整流器稳态工作时有功功率与调制比之间的关系,依此推出基于功率反馈的电压平衡控制算法,并对该算法的适用条件进行讨论;在MATLAB上进行了4级级联的系统仿真,搭建2级级联的实验样机进行实验研究。仿真与实验结果表明:该算法在满足适用范围的前提条件下,能够实现对多级CHB整流器直流母线电压的平衡控制,且保证电流控制性能良好。
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| 关 键 词： | 高压大容量变换器 级联H桥型整流器 电压平衡算法 功率反馈 |
Voltage balancing control algorithm for cascaded H-bridge rectifier based on active power feedback |
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| TAO Xinghua,LI Yongdong,SUN Min.Voltage balancing control algorithm for cascaded H-bridge rectifier based on active power feedback[J].Journal of Tsinghua University(Science and Technology),2011(7). |
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| Authors: | TAO Xinghua LI Yongdong SUN Min |
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| Institution: | TAO Xinghua1,2,LI Yongdong1,SUN Min1(1.State Key Laboratory of Control and Simulation of Power System and Generation Equipments,Tsinghua University,Beijing 100084,China,2.School of Electrical and Information Science,Naval Engineering University,Wuhan 430033,China) |
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| Abstract: | A power-feedback based control algorithm was developed to balance the DC-link voltages in a cascaded H-bridge(CHB) pulse width modulation(PWM) rectifier.The average mathematic model of the CHB rectifier is built.The relationship between the modulation index and the active power of cells is deduced by the mathematic analysis,from which the voltage balancing control method can be derived.Moreover,the feasibility of the proposed method is also discussed.Simulations on a four-cell CHB rectifier and tests on a t... |
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| Keywords: | high power and high voltage converter cascaded H-bridge rectifier voltage balancing control active power feedback |
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