A generalised instantaneous non-active power theory for STATCOM
A generalised instantaneous non-active power theory is presented. Comprehensive definitions of instantaneous active and non-active currents, as well as instantaneous, average and apparent powers, are proposed. These definitions have flexible forms that are applicable to different power systems, such...
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Published in | IET electric power applications Vol. 1; no. 6; pp. 853 - 861 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
London
Institution of engineering and technology
01.11.2007
The Institution of Engineering & Technology |
Subjects | |
Online Access | Get full text |
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Summary: | A generalised instantaneous non-active power theory is presented. Comprehensive definitions of instantaneous active and non-active currents, as well as instantaneous, average and apparent powers, are proposed. These definitions have flexible forms that are applicable to different power systems, such as single-phase or multi-phase, periodic or non-periodic and balanced or unbalanced systems. By changing the averaging interval and the reference voltage, various non-active power theories can be derived from this theory. The definitions of instantaneous active and non-active currents provide an algorithm for a STATCOM to calculate the non-active current in the load current. The theory is implemented by the STATCOM, and four cases (three-phase balanced RL load, three-phase unbalanced RL load, diode rectifier load and single-phase load) are tested. The experimental results show that the STATCOM can perform instantaneous non-active power compensation, and both the fundamental non-active component and the harmonics are eliminated from the utility, so that nearly unity power factor can be achieved. The STATCOM also has a fast dynamic response for transients. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 1751-8660 1751-8679 |
DOI: | 10.1049/iet-epa:20060290 |