Indian Journal of Science and Technology

Abstract

Background/Objectives: In this paper by utilizing frequency tracking electrical loads are shared on voltage source converters and then by applying a proposed-supplementary control system, frequency changes during changing electrical loads inside network is omitted. Methods/Statistical Analysis: Using decentralized control in Microgrids and sharing loads on power generation units respect to their nominal capacity are unavoidable approaches to have stable and ­operational network. Droop control in load sharing is known as practical and significant solution. In droop control, units output frequency, changes proportional to output active power that is not preferable. Simulation results in PSCAD are performance confirmation of proposed control system. Findings: In proposed-supplementary control system, in spite of applying droop control to share loads, nominal frequency of all power generation units are fixed in a floating way while changing output active power. Applications/Improvements: Applying proposed-supplementary control system on droop control makes microgrids appropriate for electric loads which are sensitive to frequency changes. 

Keywords: Decentralized Control, Frequency Stability, Load Sharing, Microgrid, Voltage Source Converter