Performance Enhancement of Islanded Microgrid using Advanced Control Strategies

Abstract

In this chapter, the MATLAB/Simulink executed simulations were presented with discussion along with the output simulation results. In regards to distributed hierarchical control, reduction in the amount of per unit current is visible especially for 1 L-G fault, described as the most occurring fault and 3 L-G, identified as the most severe fault. Adequate performance levels for voltage, frequency and apparent power components were achieved. An interesting conclusion can be added where the PID decentralised control used in comparison was able to reach better performance levels than conventional MPC despite its deficiencies in terms of waveforms increased waviness. Nether less, the proposed controller of modified MPC supported with FRT strategy was able to achieve higher performance levels. At the same time, all controllers were able to preserve the constriction or constraints set by IEEE standard where the transient voltage behaviour should not exceed 5% for more than 0.166 second. For the proposed decentralised control, comparable performance levels for voltage and frequency were obtained without the need for deriving complex mathematical functions or models. The simplicity in control execution is generally accompanied with stress relief upon employed hardware equipment.