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Abstract:
This paper presents a transformerless static synchronous compensator (STATCOM) system based on hybrid multilevel H-bridge converter with delta configuration. This hybrid multilevel STATCOM is characterized by per-phase series connection of a high-voltage H-bridge converter operating at fundamental frequency and a low-voltage H-bridge converter operating at 5 kHz without any other circuit for dc voltage control. A new control strategy is proposed in this paper with focus on dc voltage regulation. Clustered balancing control is realized by injecting a zero-sequence current to the delta-loop, while individual voltage control is achieved by adjusting the fundamental content of ac quasi-square-waveform voltage of high-voltage converter. A downscaled experimental prototype rated at 100 V and 3 kVA is constructed in author's laboratory. Experimental results show that the hybrid multilevel STATCOM performs satisfactory not only improving efficiency and waveform quality, but also compensating reactive power and negative-sequence current while maintaining dc voltage at the given value.
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IEEE TRANSACTIONS ON POWER ELECTRONICS
ISSN: 0885-8993
Year: 2013
Issue: 1
Volume: 28
Page: 101-111
5 . 7 2 6
JCR@2013
6 . 1 5 3
JCR@2020
ESI Discipline: ENGINEERING;
ESI HC Threshold:151
JCR Journal Grade:2
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 87
SCOPUS Cited Count: 115
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2