What is a microgrid?

Microgrid refers to a small distribution system composed of distributed power supply, power load, distribution facilities, monitoring and protection devices.

Microgrid is sometimes called microgrid: it is a concept relative to the traditional large power grid. It refers to a network composed of multiple distributed power sources and their related loads according to a certain topological structure, which is connected to the conventional power grid through static switches.

Microgrid refers to a small power generation and distribution system composed of distributed power supply, energy storage device, energy conversion device, related load and monitoring and protection device. It is an autonomous system that can realize self-control, protection and management, and can be connected with external power grid or run independently. It is an important part of smart grid.

In the past few decades, the scale of power grid has been expanding, and it has gradually developed into a super-large interconnected network system with centralized power generation and long-distance transmission. However, with the increase of long-distance transmission, the receiving power grid is more and more dependent on external power, and the stability and security of power grid operation tend to decline, which makes it difficult to meet diversified power supply needs.

On the other hand, concerns about the gradual depletion of global conventional energy and environmental pollution have become increasingly prominent. In view of this, distributed power generation with environmental protection, high efficiency and flexibility is widely favored.

Distributed power generation generally refers to the way that relatively small power generation devices (generally less than 50 MW) are distributed at the user/load site or nearby places to realize power generation and energy supply.

Distributed generation has the characteristics of flexible and decentralized location, which adapts to the decentralized power demand and resource distribution and delays the huge investment required for the upgrading of transmission and distribution networks. It is mutually standby with the large power grid, which also improves the reliability of power supply; Generally, it also has the advantages of less pollution and high energy utilization efficiency.