摘要
随着多电平逆变器的大量应用,电力电子开关器件的损耗问题也越来越得到重视。对开关器件的损耗研究,不单是提高效率的前提,更是保证器件安全工作的首要条件。三电平逆变器的开关器件多,导通与换流模式复杂,损耗分析比两电平逆变器困难。本文在分析三电平逆变器导通与换流模式的基础上,利用器件的损耗特征参数,在SPWM调制策略下对逆变器的通态损耗和开关损耗进行了计算,给出了该调制策略下的器件损耗对于调制度和功率因数角的分布曲面,并对其他调制策略下的损耗进行了计算分析,最后实验验证了该损耗计算方法的有效性。本文给出的损耗模型和结论为进一步降低损耗的调制策略研究奠定了基础。
As the extensive multi-level inverter＇s application, the loss problem of electrical semiconductor has been regarded more and more. The research on loss of switch semiconductor is not only the precondition of heighten efficiency, it also is chief condition of running safety. Three-level inverter has many switches, and the conduction and switch mode is complex, so loss analysis is more difficult than that in two-level inverter. Basic on analyzing conduction and switch mode of three-level inverter, using loss characteristic parameter of semiconductor, this paper calculats the conduction loss and switch loss of the inverter under SPWM modulation strategy and presents the loss surface for modulation index and power angle of the modulation strategy, and makes loss analysis on other modulation strategies, testifies the validity of this loss calculated method by experiment at last. Loss modes and conclusion given by this paper establish foundation for further research on reducing loss.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第12期124-131,共8页
Transactions of China Electrotechnical Society
关键词
三电平
逆变器
脉宽调制
损耗
Three-level
inverter
pulse width modulation
loss
