Adaptive Voltage Control of a 3-Phase Inverter for a Standalone Distributed Generation

Abstract

Multilevel inverters have received more attentions their considerable advantages such as high power quality, lower harmonic components, better electro- magnetic consistence, lower dv/dt and lower switching losses. Lot of research was going on multi level inverter topologies and many researchers are proposed so many multi level inverter topologies. This paper proposes a robust adaptive voltage control of three-phase voltage source inverter for a distributed generation system in a standalone operation. The proposed adaptive voltage control technique combines an adaption control term and a state feedback control term.
The proposed algorithm is easy to implement, but it is very robust to system uncertainties and sudden load disturbances. With the proposed system, we can achieve fast transient response, zero steady-state error, and low THD.Mathematical modeling and simulation studies using Simpower systems Block set of MATLAB are proposed. Switching scheme for the proposed converter circuit is designed with the help of sinusoidal pulse width modulation scheme. Total Harmonic distortion in the output voltage is evaluated using FFT tool of MATLAB SIMULINK.

Keywords: Adaptive voltage control; distributed generation system (DGS); robust control; stability analysis; standalone operation; uncertainties; voltage source inverter.