Bulgaria microgrid and smart grid

Is microgrid a smart grid?

Elements that used in microgrid, control of generation, forecasting techniques, data transmission and monitoring techniques are reviewed as smart grid functions. It is possible to implement microgrid with the usage of these functions, but these still cannot solve all issues.

What is microgrid architecture?

The microgrid architecture is categorized into three categories based on future smart grid vision, i.e., AC, DC, and hybrid microgrids. Elements that used in microgrid, control of generation, forecasting techniques, data transmission and monitoring techniques are reviewed as smart grid functions.

What are the challenges to connecting microgrid system to distribution grid?

Despite many advantages of microgrids, there are major challenges to connecting microgrid system to distribution grid. These challenges can be classified as technical challenges associated with control and protection system, regulation challenges and customer participation challenges.

What is a microgrid system?

The microgrids can be defined as small, local distribution systems including a set of microsources such as microturbines, fuel cells, photovoltaic (PV) arrays and wind turbines, storage systems, such as flywheels, energy capacitors, and batteries and controllable and uncontrollable loads.

Why do we need microgrids?

The inherent characteristics of microgrids are providing flexibility to connect/disconnect from grid when needed. That feature of microgrid provides better reliability, lower investment cost, reduce emissions, improve power quality, and reduce the power losses of distribution network.

Are energy storage devices a key component of microgrids?

Energy storage devices are essential component of microgrids, which effectively balance power between renewable energy resources and loads. Specific charge/discharge control strategies are needed to achieve this objective. In the literature, different control strategies are available.