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Advanced vector control for voltage source converters connected to weak grids

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10.1109/TPWRS.2014.2384596
 
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hdl:2117/78712

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Egea Àlvarez, Agustí
Fekriasl, Sajjad
Hassan, Fainan
Gomis Bellmunt, OriolMés informacióMés informacióMés informació
Document typeArticle
Defense date2015-11-01
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
This paper addresses an advanced vector current control for a voltage source converter (VSC) connected to a weak grid. The proposed control methodology permits high-performance regulation of the active power and the voltage for the feasible VSC range of operation. First, the steady state characteristics for a power converter connected to a very weak system with a short circuit ratio (SCR) of 1 are discussed in order to identify the system limits. Then, the conventional vector control (inner loop) and the conventional power/voltage control (outer loop) stability and frequency responses are analyzed. From the analysis of the classic structure, an enhanced outer loop based on a decoupled and gain-scheduling controller is presented and its stability is analyzed. The proposed control is validated by means of dynamic simulations and it is compared with classic vector current control. Simulation results illustrate that the proposed control system could provide a promising approach to tackle the challenging problem of VSC in connection with weak AC grids.
CitationEgea, A., Fekriasl, S., Hassan, F., Gomis-Bellmunt, O. Advanced vector control for voltage source converters connected to weak grids. "IEEE transactions on power systems", 01 Novembre 2015, vol. 30, núm. 6, p. 3072-3081. 
URIhttp://hdl.handle.net/2117/78712
DOI10.1109/TPWRS.2014.2384596
ISSN0885-8950
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  • CITCEA - Centre d'Innovació Tecnològica en Convertidors Estàtics i Accionaments - Articles de revista [226]
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