Dynamic modeling of a hybrid wind/solar/hydro microgrid in EMTP/ATP

Microgrids are LV or MV electric networks which utilize various distributed generators (DG) to serve local loads. In this paper, dynamic models of the main distributed generators including photovoltaic (PV) cell, wind turbine, hydro turbine as well as the equivalent power electronic interfaces, battery unit of PV and excitation system of hydro turbine have been made in ElectroMagnetic Transient Program/Alternative Transient Program (EMTP/ATP) software package. Control strategies based on active power/frequency and reactive power/voltage droops for the power control of the inverters have been also developed. Case studies have been carried out in a distribution network to investigate the dynamic behavior of the micro-sources in both steady state and fault scenarios. Simulation results verify the feasibility of the proposed models.

► Dynamic models of distributed generators including PV, wind, hydro systems have been made in ATP.
► Control strategies for the active/reactive power regulations have been also developed.
► Operational behavior in fault scenarios have been investigated in a distribution network.
► Micro-sources reallocate active/reactive power to keep voltage/frequency stable during fault.
► The automatic excitation control system contributes effective improvement of terminal voltage.