Typically, DC energy sources such as photovoltaic and energy storage systems are connected to the microgrid through parallel inverters. In order to achieve a balanced power-sharing between these inverters, a proper control strategy is required. In this paper, droop control technique is utilized for a robust operation of two parallel inverters implemented with Metal-Oxide Semiconductor Filed Effect Transistor (MOSFET). The droop controller is implemented in the dq reference frame with the Sinusoidal Pulse Width Modulation (SPWM) being adapted as the switching technique. The droop controller is combined of three control loops: power control loop, voltage control loop and current control loop. All of the control loops are represented by the proportional and integral (PI) controller. The complete structure of the two parallel inverters-based Microgrid with droop controller is presented herein as a basis to derive a mathematical model for the proposed system and the control strategy. The performance of the proposed controller is tested through MATLAB/SIMULINK simulation. The simulation results show that a smooth and robust power-sharing is achieved with a slight variation in frequency and voltage.
Robust Stabilization of Parallel Inverters-Based Microgrid: Droop Control Strategy
16.08.2021
3641858 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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