In the context of the global drive towards sustainability and rapid integration of renewables, electric vehicles, and charging infrastructure, the need arises for advanced operational strategies that support the grid while
larger power unbalance. The decentralised continuous control is designed by integrating the outer loop droop controller with the inner loop prescribed performance controller in the lower level
Microgrids are networked control systems with multiple distributed generators (DGs). Microgrids are associated with many problems, such as communication delays, high sampling rates, and
In this paper, the coordination control strategies are proposed for the hybrid AC/DC microgrid, operating in grid-connected mode and islanded mode. The control strategies are verified with Matlab/Simulink under various
conditions and designs the power coordination control strategy of AC/DC hybrid microgrid under grid-connected and isolated island conditions. Since the droop control model in the paper is a
Practically, microgrid controllers are designed to perform certain operation to serve multiple control objectives as listed down , . Bus voltage control and frequency control under both grid-tied and islanded operating mode. Control of real and reactive power realizing better power sharing during both grid-tied and islanded operating mode.
Majority of the researchers have proposed power management control aspects using decentralized or coordinated control strategies. While, the current strategies based on traditional controllers in microgrid are appropriate for voltage control, the inadequate control of frequency still exists.
To increase the dynamic stability, a comprehensive control scheme based on two regulator loops able to control the frequency and DC voltage is suggested for IC control of hybrid AC/DC microgrid . A nonlinear load harmonic suppression in islanded microgrid can be realized by virtual synchronous generator as discussed in .
In islanded mode, V/F control is applied to stabilising the entire system voltage and frequency, achieving the power balance between the AC and DC systems. Finally, these control strategies are verified by simulation with the results showing that the control scheme would maintain stable operation of the hybrid AC/DC microgrid.
Moreover, a hierarchical control is mostly suitable control strategy for AC-DC microgrids as discussed in , , . Also, to provide stable operation in microgrid and smooth transition in an active distribution networks, distributed control strategy can be employed as discussed in , .
Research challenges and future prospect on hybrid AC-DC microgrid control In this paper an attempt is made to review hybrid AC-DC microgrid with IC topologies in brief and their control schemes in details. Many control schemes and control configurations can be categorized as centralized and decentralized as reviewed in .
