Microgrid Projects List
Micro-grid is generally classified as a collection of various distributed generation sources (DGs), energy storage systems, and local loads either connected to the main utility grid or operated in islanded mode. However, unlike conventional generators, DGs may include variable frequency sources and direct energy conversion sources that produce DC voltages or currents. Usually, these units are integrated into a micro-grid via DC/AC inverter systems, which are aimed at controlling the power injection, while simultaneously improving the power quality. Although micro-grid power demands have increased, the ratings of the inverter switching devices are often limited by technical or economic considerations. Thus, multi-inverters operating in parallel are often used to increase the system’s capacity. An important research area for islanded micro-grid is the development of a proper control strategy to ensure close voltage regulation and accurate power sharing of each paralleled inverter under different line impedances and system conditions.
Microgrid is a localized grouping of electricity sources and loads that normally operates connected to and synchronous with the traditional centralized electrical grid (microgrid), but can disconnect and function autonomously as physical and/or economic conditions dictate. By this way, it paves a way to effectively integrate various sources of distributed generation (DG), especially Renewable Energy Sources (RES). It also provides a good solution for supplying power in case of an emergency by having the ability to change between islanded mode and grid-connected mode. On the other hand, control and protection are big challenges in this type of network configuration, which is generally treated as a hierarchical control.