Capacitors Voltage Switching Ripple in Three-Phase Three-Level Neutral Point Clamped Inverters with Self-Balancing Carrier-Based Modulation

被引：13

作者：

Hammami, Manel ^{[1
]}

Rizzoli, Gabriele ^{[1
]}

Mandrioli, Riccardo ^{[1
]}

Grandi, Gabriele ^{[1
]}

机构：

[1] Univ Bologna, Dept Elect Elect & Informat Engn, I-40136 Bologna, Italy

来源：

ENERGIES | 2018年 / 11卷 / 12期

关键词：

voltage ripple; voltage source inverter; three-phase inverter; DC-link capacitor design; PWM; OSCILLATIONS; ELIMINATION; STRATEGY;

D O I：

10.3390/en11123244

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper provides a comprehensive analysis of the capacitors voltage switching ripple for three-phase three-level neutral point clamped (NPC) inverter topologies. The voltage ripple amplitudes of the two dc-link capacitors are theoretically estimated as a function of both amplitude and phase angle of output current and the inverter modulation index. In particular, peak-to-peak distribution and maximum amplitudes of the capacitor voltage switching ripple over the fundamental period are obtained. A comparison is made considering different carrier-based pulse-width modulations in the case of almost all sinusoidal load currents, representing either grid connection or passive load with a negligible current ripple. Based on the voltage switching ripple requirements of capacitors, a simple and effective original equation for a preliminary sizing of the capacitors has been proposed. Numerical simulations and experimental tests have been carried out in order to verify the analytical developments.

引用

页数：20

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