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Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer
Joint Authors
Source
Journal of Control Science and Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-02
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Electronic engineering
Information Technology and Computer Science
Abstract EN
In order to achieve the low cost and high performance control of three-phase PWM rectifier, a direct power control (DPC) strategy based on a new-style virtual flux-linkage observer is proposed.
The model of three-phase PWM rectifier and the principle of virtual flux-linkage vector control are introduced firstly.
Then, in order to avoid the effect of integral initial value and cumulative deviation, three first-order low-pass filters are cascaded to replace the pure integral link; an improved virtual flux-linkage observer of three-phase power grid is presented.
From the observed virtual flux-linkage, the voltage and instantaneous power of three-phase power grid are online estimated.
On this basis, the power grid voltage sensorless direct power control system of three-phase PWM rectifier is designed.
Simulation results have shown that, both in the rectifying state and in the inverting state, the power grid side current and the DC side voltage of three-phase PWM rectifier all can be effectively controlled; the high power factor operation of three-phase PWM rectifier is realized.
American Psychological Association (APA)
Bu, Wen-shao& Xu, Leilei. 2017. Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer. Journal of Control Science and Engineering،Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1173587
Modern Language Association (MLA)
Bu, Wen-shao& Xu, Leilei. Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer. Journal of Control Science and Engineering No. 2017 (2017), pp.1-9.
https://search.emarefa.net/detail/BIM-1173587
American Medical Association (AMA)
Bu, Wen-shao& Xu, Leilei. Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer. Journal of Control Science and Engineering. 2017. Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1173587
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1173587