Analysis of parallel operation of seigs with voltage based controller in mini-grid

This paper presents the analysis of simulation-results of a Mini-Grid system consisting of two SEIGs 0.46 MVA and 0.23 MVA and voltage based generator controllers in SIMPOW®. The typical test-cases include simulation of SEIG, with lead-lag controller and PI controller in Mini-Grid system, when subjected to ramping load (both active and reactive). The results show that the characteristics of the conductance controller have very little influence in operation of such system. Whereas, ramping of active and reactive power of the load, more than the rated capacity of the resistive shunt, has significant effect on the stability of the system. The simulations also show that the voltage dependency of the load has a significant influence on the dynamic stability of the system.