Microgrid shutdown process

What is a microgrid & how does it work?

A microgrid is the integration of different distributed energy resources, storage devices, smart protection systems, and loads that can operate independently or in collaboration with traditional power grids. Microgrids can be classified as AC or DC based on the usage of the AC/DC distribution buses.

How does a DC to AC microgrid work?

DC loads and sources are connected to the microgrid by buck/boost converters. A DC-to-DC bidirectional converter is used for the connection of energy storage devices, such as battery and supercapacitor, to the DC microgrid. Power to AC loads can be directly supplied from the AC microgrid.

How do microgrids maintain power quality?

To maintain power quality, either the power (real and reactive) is imported from or exported to the utility/conventional grid . Also, the power flow between DC and AC microgrids has to be maintained to operate microgrids in coordination for the proper functioning of the system.

How does distributed generation work in a micro-grid?

Five distributed generation (DG) sources with associated characteristics generate electricity within the micro-grid. Any excess or shortfall of energy within the grid is balanced through exchange with the utility at the point of common coupling.

How droop control is used in a hybrid microgrid system?

For achieving proper control among different components of a hybrid microgrid system, control methods like Droop Control are used. In this method, all the DERs in the grid are controlled as synchronous generators. When there is a drop in the frequency of the generator, then the output active power of the grid increases.

What are microgrid control objectives?

The microgrid control objectives consist of: (a) independent active and reactive power control, (b) correction of voltage sag and system imbalances, and (c) fulfilling the grid's load dynamics requirements. In assuring proper operation, power systems require proper control strategies.