Real-time simulation of an Islanded microgrid using educational Miniature Full Spectrum Simulator

Miniature Full Spectrum Simulator (mini-FSS) is a real-time simulator for power electronics and power systems applications, meant for educational purposes. It has been indigenously developed under the National Mission on Power Electronics Technology (NaMPET) Phase II, funded by Government of India. This paper presents the real-time simulation of an islanded microgrid on the mini-FSS. As a first test case this paper presents the real-time simulation of a diesel generator (DG) set, feeding a load through a transformer and a transmission line. The DG set consists of an IC engine coupled with a synchronous machine, inclusive of controllers for both. The second test case consists of a three phase inverter, transformer, transmission line and a load. Finally, real-time simulation of the the DG set and the inverter, operating in parallel to supply a common load is carried out. The three test cases are systems of order 22, 13 and 35, respectively. The mini-FSS is found to be effective in simulating such high order systems in real-time. Comparative results from off-line simulation using Simulink® and from RTDS® are presented.