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- Micro-Grid

Introduction of Micro-Grid Solutions

A smart micro-grid is an intelligent power generation and distribution system consisting of distributed power generation devices such as photovoltaic and wind power, energy storage devices, related to load data collection and monitoring, and self-protection devices. The micro-grid system is an autonomous system capable of self-monitoring, protection and management, which can operate either in parallel with the external grid or in isolation. The micro-grid is divided into three main parts: supply side of energy, side of the main grid and side of load electricity.

Micro-Grid solutions

01
Micro-Grid Solutions for Areas Without Electricity/Weak Power
Scenario 1
Remote village micro-grid
The remote villages and the long distances of low-voltage branch lines make the quality of electricity for residents unstable during peak hours, resulting in discontinuous power supply, which seriously affects the normal life of residents with electricity.
System characteristics
DC Bus
Energy Storage
Inverter (simple and controllable, no EMS system required)
Scenario 2
Island micro-grid
Using renewable energy sources such as wind power and photovoltaic power generation, combining with diesel generators to complement each other, and to provide the basic energy required for the separate area.
System characteristics
Photovoltaic
Wind Power
Energy Storage PCS
System EMS
Isolation Transformer
02
Commercial and Industrial Micro-Grids
Widely used in a variety of scenarios such as industrial parks, industrial and commercial parks, office buildings, etc. Because the scenarios power distribution capacity transformation is often constrained by the distribution capacity, expansion is difficult, and the investment in power expansion is large.
System characteristics
PV
Wind Power
Energy Storage PCS
System EMS
Grid-Connected Operation
03
Large Centralised Plants Micro-Grid
Large-scale centralized energy storage power plants are mainly used in large photovoltaic power generation, large wind farms. The general capacity is MW or more, which connected to the medium and high-voltage power grids.
System characteristics
PV Power
Energy Storage PCS
Energy Storage EMS
Energy Storage Without Load
04
Customer-Side Small-Scale Household Micro-Grid
Suitable for urban, small town and rural households with grid access. Island customers without grid access. Households in areas with large differences in peak electricity prices and unstable grid access.
System characteristics
PV Power
Energy Storage PCS
Energy Storage EMS
Grid-Connected Operation