Smart Microgrid Grid-connected Operation Principle

Are microgrids a smart grid?

Abstract: Microgrids are relatively smaller but complete power systems. They incorporate the most innovative technologies in the energy sector, including distributed generation sources and power converters with modern control strategies. In the future smart grids, they will be an essential element in their architecture.

What is the operation principle of dc microgrid?

The operation principle of DC microgrid is similar to AC microgrid. Compared with AC microgrid, DC microgrid is a good solution to reduce the power conversion losses because it only needs once power conversion to connect DC bus. Therefore, DC microgrid has higher system efficiency, lower cost and system size.

What are interconnection rules between microgrid and main grid?

Moreover, interconnection rules between microgrid and main grid are designed in order to standardize the process and manage the impacts of DG integration without disturbing the functionality and safety of the main grid . These rules must immediately disconnect with grid connection in case of any faults, blackouts, etc.

Can a microgrid connect and disconnect from the grid?

A microgrid can connect and disconnect from the grid to enable it to operate in both grid-connected or island mode.” P.K. Singh “Technical and Economic Potential of Microgrid in California”, Humboldt State University, 2017. Generation Controller (BMS, Diesel Control, et.)

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.

What is Microgrid technology?

It is a small-scale power system with distributed energy resources. To realize the distributed generation potential, adopting a system where the associated loads and generation are considered as a subsystem or a microgrid is essential. In this article, a literature review is made on microgrid technology.