Design of a Control Scheme for Distribution Static Synchronous Compensators with Power-Quality Improvement Capability

Pedro Roncero-Sànchez and Enrique Acha
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Pedro Roncero-Sànchez: School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario S/N,13071 Ciudad Real, Spain
Enrique Acha: Department of Electrical Engineering, Tampere University of Technology, Korkeakoulunkatu 10,FI-33720 Tampere, Finland

Energies, 2014, vol. 7, issue 4, 1-22

Abstract: Electric power systems are among the greatest achievements of the last century. Today, important issues, such as an ever-increasing demand, the flexible and reliable integration of distributed generation or a growth in disturbing loads, must be borne in mind. In this context, smart grids play a key role, allowing better efficiency of power systems. Power electronics provides solutions to the aforementioned matters, since it allows various energy sources to be integrated into smart grids. Nevertheless, the design of the various control schemes that are necessary for the correct operation of the power-electronic interface is a very important issue that must always be taken into consideration. This paper deals with the design of the control system of a distribution static synchronous compensator (DSTATCOM) based on flying-capacitor multilevel converters. The control system is tailored to compensate for both voltage sags by means of reactive-power injection and voltage imbalances caused by unbalanced loads. The design of the overall control is carried out by using the root-locus and frequency-response techniques, improving both the transient response and the steady-state error of the closed-loop system. Simulation results obtained using PSCADTM/EMTDCTM (Manitoba Hydro International Ltd., Commerce Drive, Winnipeg, MB, Canada) show the resultant voltage regulation.

Keywords: power quality; voltage sag; smart grid; distribution static synchronous compensator (DSTATCOM); flying-capacitor multilevel converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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