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Phase Angle Control of Three Level Inverter Based D-STATCOM Using Neuro-Fuzzy Controller

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Author(s): COTELI, R. | DENIZ, E. | DANDIL, B. | TUNCER, S. | ATA, F.

Journal: Advances in Electrical and Computer Engineering
ISSN 1582-7445

Volume: 12;
Issue: 1;
Start page: 77;
Date: 2012;
Original page

Keywords: electric power quality | D-STATCOM | three-level H-bridge inverter | neuro-fuzzy controller | MATLAB

ABSTRACT
Distribution Static Compensator (D-STATCOM) is a shunt compensation device used to improve electric power quality in distribution systems. It is well-known that D-STATCOM is a nonlinear, semi-defined and time-varying system. Therefore, control of D-STATCOM by the conventional control techniques is very difficult task. In this paper, the control of D-STATCOM is carried out by the neuro-fuzzy controller (NFC) which has non-linear and robust structure. For this aim, an experimental setup based on three-level H-bridge inverter is constructed. Phase angle control method is used for control of D-STATCOM's output reactive power. Control algorithm for this experimental setup is prepared in MATLAB/Simulink and downloaded to DS1103 controller card. A Mamdani type NFC is designed for control of D-STATCOM's reactive current. Output of NFC is integrated to increase tracking performance of controller in steady state. The performance of D-STATCOM is experimentally evaluated by changing reference reactive current as on-line. The experimental results show that the proposed controller gives very satisfactory performance under different loading conditions.
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