ALLPCB
Overview
Energy storage plays a critical role across the entire electricity value chain. Its functions span generation, transmission, distribution, and end users. By buffering electrical energy, storage systems can optimize power quality and improve the stability of renewable energy microgrids.
A microgrid is an important component for implementing the smart grid. It can integrate internal power sources and loads, coordinate with the main grid, connect to or operate independently from the main grid, and meet or improve user requirements for power quality, reliability, and security.
A microgrid energy storage system stores energy and supplies it when needed. It typically consists of renewable generation (such as solar and wind), storage devices (such as batteries and supercapacitors), and an energy management system (EMS). Its primary function is to store electrical energy and provide reserves when supply and demand are imbalanced, ensuring balanced and reliable energy supply.
Key Functions
A microgrid energy storage system can provide the following functions:
- Energy balance between storage and generation: When renewable generation exceeds load, the storage system can store excess energy for later demand, ensuring system stability and continuity.
- Peak shaving and peak shifting: Storage can discharge during peak demand periods to support the grid's peak load requirements.
- Voltage and frequency stabilization: By storing and dispatching energy, the storage system helps adjust voltage and frequency to maintain the stability and reliability of the power system.
- Bi-directional power flow: Storage can discharge to supply the grid and can also absorb power from the grid, enabling two-way energy flow.
In summary, microgrid energy storage systems enable large-scale energy storage and supply-demand balancing. They support self-supply and efficient energy use, are suitable for systems of various scales—particularly in remote areas—and, because of their flexibility and reliability, have become a focus for renewable energy development in many regions.
