DETERMINING THE BEST PERFORMANCE INDICES FOR OPTIMUM CONTROL SIGNAL GENERATION IN A DSTATCOM MODEL

Abstract

Smart distribution grid can be automated for better power quality (PQ) control by
providing additional control strategies to the energy conversion devices such as the
distribution static synchronous compensator (DSTATCOM). Appropriate objective
function routine is essential in an automated grid for driving the control signals, such
that the overall power losses are minimised. In this paper, design procedure of an
advanced control strategy for DSTATCOM via model-free-predictive-controller (MFPC)
has been proposed. A decision criterion was reached based on combination of
performance indices that would generate optimum control signals for the distribution
system. Ten indices were paired and simulated in a developed Matlab/Simulink
DSTATCOM model. The MFPC based integral time squared error plus the integral time
squared error derivative (ITSE + ITSED) paired index produced the desired optimum
control signal of 0.0046 radians when compared to manual computer aided design (CAD)
and a gradient based computer automated design (CAutoD) methods.