Average power balancing control of a STATCOM based on the cascaded H-bridge PWM converter with star configuration

Author

Shih-feng Chou ; Bo-siang Wang ; Sheng-wan Chen ; Chia-Tse Lee ; Po-Tai Cheng ; Akagi, Hirofumi ; Barbosa, Paulo

Author_Institution

Delta Electron., Inc., Changhua, Taiwan

fYear

2013

fDate

15-19 Sept. 2013

Firstpage

970

Lastpage

977

Abstract

This paper presents the average power balancing (APB) control method for the modular multilevel cascaded converter (MMCC) based on single-star bridge cells (SSBC) in the static synchronous compensator (STATCOM) applications. The proposed APB control accomplishes both the reactive power injection and all the dc voltage balancing control at the same time. These functionalities also work even as grid voltage sag occurs. The control algorithm is verified with a 220-V 1kVA STATCOM based on MMCC-SSBC, and the test results show that all the dc voltages are still regulated at the commanded value even in the unbalanced grid voltages.

Keywords

PWM power convertors; power supply quality; reactive power control; static VAr compensators; voltage control; APB control method; MMCC-SSBC; STATCOM applications; apparent power 1 kVA; average power balancing control; cascaded H-bridge PWM converter; dc voltage balancing control; grid voltage sag; modular multilevel cascaded converter; reactive power injection; single-star bridge cells; star configuration; static synchronous compensator applications; unbalanced grid voltages; voltage 220 V; Automatic voltage control; Bridge circuits; Equations; Mathematical model; Pulse width modulation; Reactive power; Low-voltage ride-through (LVRT); Modular Multilevel Cascaded Converter; PWM cascaded converter; STATCOM;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2013 IEEE

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/ECCE.2013.6646808

Filename

6646808