AC Low-Voltage Grid-Connected Cabinet: A Key Equipment in Power Systems

I. Definition and Functions of AC Low-Voltage Grid-Connected Cabinet

An AC low-voltage grid-connected cabinet is an electrical equipment used to connect distributed energy sources (such as solar photovoltaic power generation, wind power generation, etc.) to the low-voltage power grid. It mainly has the following functions:

Electric energy metering: Accurately measure the electric energy transmitted by the distributed energy system to the power grid, providing a basis for energy settlement.

Protection function: Provide protections such as overcurrent, overvoltage, undervoltage, and short circuit to ensure the safe operation of equipment and the power grid.

Control function: Realize start-stop control and power regulation of the distributed energy system to meet the needs of the power grid.

Grid connection switching: When necessary, it can realize rapid switching between the distributed energy system and the power grid to ensure the continuity of power supply.

II. Characteristics of AC Low-Voltage Grid-Connected Cabinet

High reliability: Adopting high-quality electrical components and advanced manufacturing processes to ensure the long-term stable operation of the equipment.

High degree of intelligence: Equipped with an advanced monitoring system that can monitor the operating status of the equipment and grid parameters in real time and realize remote control and management.

Convenient installation: Compact structure, small footprint, simple and quick installation, suitable for various occasions.

Strong compatibility: It can be compatible with different types of distributed energy systems and power grids to meet the needs of different users.

III. Importance of AC Low-Voltage Grid-Connected Cabinet in Power Systems

Promote the development of distributed energy: With the rapid development of renewable energy, distributed energy systems are attracting more and more attention. AC low-voltage grid-connected cabinet provide a convenient way for the access of distributed energy, promoting the large-scale application of distributed energy.

Improve the stability and reliability of the power grid: Distributed energy systems can provide backup power in case of grid failures, improving the stability and reliability of the power grid. AC low-voltage grid-connected cabinet can realize the coordinated operation of distributed energy systems and the power grid to ensure stable power supply.

Reduce energy costs: Distributed energy systems can generate electricity locally and be consumed locally, reducing power transmission losses and energy waste. The application of AC low-voltage grid-connected cabinets can promote the efficient use of distributed energy and reduce energy costs.

Promote energy transformation: AC low-voltage grid-connected cabinets are one of the key equipments for realizing energy transformation. It helps to build a new power system dominated by renewable energy and achieve the goal of sustainable development.

IV. Application Cases of AC Low-Voltage Grid-Connected Cabinet

Here is an application case of an AC low-voltage grid-connected cabinet in a solar photovoltaic power generation system:

A factory installed a 1MW solar photovoltaic power generation system, and connected the electric energy generated by the photovoltaic power generation system to the factory’s low-voltage power grid through an AC low-voltage grid-connected cabinet. The grid-connected cabinet has functions such as electric energy metering, protection, and control, and can monitor the operating status of the photovoltaic power generation system and grid parameters in real time. During the day, the electric energy generated by the photovoltaic power generation system first meets the electricity demand of the factory, and the excess electric energy is transmitted to the power grid; at night or when the photovoltaic power generation system cannot meet the factory’s electricity demand, the power grid supplies power to the factory. Through the application of AC low-voltage grid-connected cabinets, the factory has achieved energy self-sufficiency, reduced energy costs, and also contributed to environmental protection.

V. Summary

As an important equipment connecting distributed energy and the power grid, AC low-voltage grid-connected cabinets have characteristics such as high reliability, high degree of intelligence, convenient installation, and strong compatibility. It plays an important role in promoting the development of distributed energy, improving the stability and reliability of the power grid, reducing energy costs, and promoting energy transformation. With the continuous development and application of renewable energy, the market demand for AC low-voltage grid-connected cabinets will also continue to grow. We believe that in the future power system, AC low-voltage grid-connected cabinets will play an even more important role.