Secondary and Primary Goal-Function-Based Control in Inverter-Interfaced Microgrids

Abstract

In this paper a comprehensive, primary and secondary control of a grid-connected inverter in the role of microgrid interface unit is presented. A goal-function-based decentralized control structure is proposed as a core of the primary control. It secures the microgrid stability by constraining the frequency and node deviations across the grid while simultaneously supporting the desired active power exchange between prosumer nodes. To demonstrate its effectiveness, results obtained from the simulation model, which includes microgrid inverters’ secondary control, primary control, and inner control loops together with appropriate LCL filter are presented.

Mateo Bašić

Full Professor | Department of Power Electronics and Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture in Split, with recent research interests related to the fields of power electronics and renewable energy sources, with a special focus on energy-efficient control of inverters, battery systems, wind turbines, photovoltaic sources and self-excited induction generators in microgrids - both in island operation and in grid-tie operation.