A Flexible DC Voltage Balancing Control Based on the Power Flow Management for Star-Connected Cascaded H-Bridge Converter

This paper presents the flexible dc capacitor voltages balancing control method for star-connected cascaded H-bridge converters. In this paper, the power flows are analyzed by investigating all the converter's control freedoms. Based on the analyses, users can accomplish the dc capacitor voltag...

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Published in:IEEE transactions on industry applications 2016-11, Vol.52 (6), p.4946-4954
Main Authors: Chen, Hsin-Chih, Wu, Ping-Heng, Lee, Chia-Tse, Wang, Ching-Wei, Yang, Ching-Hsiang, Cheng, Po-Tai
Format: Article
Language:English
Subjects:
Automatic voltage control
Balancing
Capacitor voltage balancing control
Capacitors
Control methods
Electric converters
Electric potential
low-voltage ride-through (LVRT)
Mathematical model
modular multilevel cascaded converter
Power conversion
Power flow
Pulse width modulation
PWM cascaded converter
Static synchronous compensators
static synchronous compensators (STATCOM)
Voltage
Weighting
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cited_by cdi_FETCH-LOGICAL-c291t-c5a68c131b042fd02cbb6e9f82f3456d2217987a972d47da26dd1fb9ba091dac3
cites cdi_FETCH-LOGICAL-c291t-c5a68c131b042fd02cbb6e9f82f3456d2217987a972d47da26dd1fb9ba091dac3
container_end_page 4954
container_issue 6
container_start_page 4946
container_title IEEE transactions on industry applications
container_volume 52
creator Chen, Hsin-Chih
Wu, Ping-Heng
Lee, Chia-Tse
Wang, Ching-Wei
Yang, Ching-Hsiang
Cheng, Po-Tai
description This paper presents the flexible dc capacitor voltages balancing control method for star-connected cascaded H-bridge converters. In this paper, the power flows are analyzed by investigating all the converter's control freedoms. Based on the analyses, users can accomplish the dc capacitor voltage balancing with both negative-sequence current and zero-sequence voltage. These two kinds of control options are further integrated together with the defined weighting factor K. The low-voltage ride-through operation of a proposed control method is also discussed in this paper. The control method is verified with a 220-V 1-kVA static synchronous compensators based on the star-connected cascaded H-bridge converters, and the experimental test results show that all the dc voltages are well regulated at the commanded value with different weighting factor K.
doi_str_mv 10.1109/TIA.2016.2600667
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1939-9367
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source IEEE Electronic Library (IEL) Journals
subjects Automatic voltage control
Balancing
Capacitor voltage balancing control
Capacitors
Control methods
Electric converters
Electric potential
low-voltage ride-through (LVRT)
Mathematical model
modular multilevel cascaded converter
Power conversion
Power flow
Pulse width modulation
PWM cascaded converter
Static synchronous compensators
static synchronous compensators (STATCOM)
Voltage
Weighting
title A Flexible DC Voltage Balancing Control Based on the Power Flow Management for Star-Connected Cascaded H-Bridge Converter
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