Economic load sharing in a D-STATCOM Integrated Islanded Microgrid based on Fuzzy Logic and Seeker Optimization Approach

In this manuscript, an optimized Dynamic PI-Controller based on Fuzzy logic and Seeker Optimization Approach (SOA) are proposed for a Microgrid comprised with hybrid micro-sources to ensure the highest end-user energy cost efficiency and energy supply reliability. The two micro-sources Photovoltaic and Fuel Cell are considered taking the first one with an objective to act as a primary source and later is integrated to enhance the economic load sharing and power quality of the overall system. Furthermore, the effect of D-STATCOM as a reactive power compensator is investigated not only for the above factors but also for the load balancing enhancement. With the addition to the above, a communication less modified Virtual Impedance Drooping power sharing scheme is proposed to ensure the improvement in stability related issues like transient and sub-transient disturbances by optimal power sharing. To ensure the proposed approach for its practical implementation harmonic analysis has been carried out by computing Total Harmonic Distortion (THD) through Fast Fourier Transform (FFT) and to make sure its value well within the prescribed limit IEEE-519 standard. The comparative simulated results are demonstrated under various abnormal operating conditions to justify the enhanced performance of the proposed control approach.