Balance control strategy for Multilevel DC-link inverter based on SHEPWM

Author

Jinping Chen ; Yuyao He ; Yongfeng Ju ; Feng Ru

Author_Institution

Chang´an Univ., Xi´an

fYear

2008

fDate

16-18 July 2008

Firstpage

270

Lastpage

274

Abstract

To solve the problem that the output power and switch burthen of each DC-DC converter cell in the multilevel DC-link (MLDCL) inverter are imbalance, a new power balance control strategy is proposed in this paper. By adjusting the control angles of selective harmonic elimination PWM (SHEPWM) in each cell during quarter output cycle of phase voltage to overcome the adverse effects of the control angles in conventional SHEPWM, it can balance the output power of each cell with a wide range of modulation indexes. Meanwhile the numbers of switch and the switch burthen of each power devices in the cells also achieve balance. Further more, the new strategy is simulated and confirmed with different modulation indexes, and the simulation results also show that it can improve the waveform performance of phase voltage.

Keywords

DC-DC power convertors; PWM invertors; harmonics suppression; invertors; power system control; switching convertors; DC-DC converter cell; SHEPWM; balance control strategy; modulation indexes; multilevel DC-link inverter; selective harmonic elimination; DC-DC power converters; Helium; Power generation; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Switches; Switching converters; Virtual colonoscopy; Voltage control; Balance control; Modulation indexes; Multilevel DC-link inverter; SHEPWM; Total harmonic distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference, 2008. CCC 2008. 27th Chinese

Conference_Location

Kunming

Print_ISBN

978-7-900719-70-6

Electronic_ISBN

978-7-900719-70-6

Type

conf

DOI

10.1109/CHICC.2008.4605727

Filename

4605727