Pareto optimization of multilevel inverter structures regarding the DC magnitude, switching frequency and switching angles

被引:0
|
作者
Stoettner, Julia [1 ]
Rauscher, Andreas [1 ]
Endisch, Christian [1 ]
机构
[1] TH Ingolstadt, Inst Innovat Mobil, Esplanade 10, D-85049 Ingolstadt, Germany
关键词
Cascaded H-bridge (CHB); Electric vehicle (EV); Multilevel inverter (MLI); Pareto optimization (PO); HARMONIC ELIMINATION; MODULATION; TOPOLOGIES; CONVERTER; DISTORTION; REDUCTION; SERIES; NUMBER;
D O I
10.1016/j.ijepes.2022.108259
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Due to several advantages over conventional inverters, multilevel inverters (MLIs) have been increasingly investigated for the automotive sector in recent years. Therefore, this publication proposes the design optimization of a cascaded H-bridge MLI for vehicle applications under three different control strategies; a sinusoidal pulse-width modulation (SPWM), a selective harmonic elimination (SHE) method as well as the combination of both, an SHE-PWM scheme. Besides the voltage magnitude of each submodule, also the switching frequency and switching angles are optimized depending on the respective modulation technique. Because of the typical opposing relationship of inverter losses and total harmonic distortion (THD), the Pareto front is used to solve this multiobjective optimization problem. Subsequently, the optimized MLI designs are compared for a dynamic driving profile. The comparison shows that the SPWM-MLI configuration with a number of 10 modules and a frequency modulation index of 162 outperforms the other two MLI designs obtaining an averaged THD reduction of more than a factor of two. All three optimized MLIs achieve an efficiency above 92.5%. Furthermore, a traditional SPWM-based three-level inverter cannot keep up with the SPWM-MLI in terms of distortion and inverter efficiency.
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页数:9
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