Prefabricated substation: Functions and applications

Prefabricated substation, also known as box-type substation, is a compact complete set of power distribution equipment that integrates high-voltage switchgear, distribution transformer, low-voltage switchgear, electric energy metering equipment and reactive power compensation equipment. It cleverly combines these devices in one or more boxes according to a specific wiring scheme, achieving an organic integration of transformer step-down and low-voltage power distribution functions.

Functions of prefabricated substations

Transformer step-down: Prefabricated substations can convert high voltage electricity into low voltage electricity to meet the needs of different voltage levels.

Electricity metering: Prefabricated substations can accurately measure the consumption of electricity, helping users to reasonably control and use electricity resources.

Reactive power compensation: Prefabricated substations use reactive power compensation devices to improve the power factor of the power system, reduce line losses, and thus improve the quality of power supply.

Comprehensive protection: Prefabricated substations have functions such as overload protection and short-circuit protection to ensure safe and stable operation of the power grid.

Remote monitoring: Prefabricated substations can achieve remote monitoring and operation through communication modules to improve operation and maintenance efficiency.

Application of prefabricated substations

1. Urban distribution network

In urban distribution networks, prefabricated substations are widely used. With the acceleration of urbanization, urban electricity load continues to rise, which puts higher requirements on the reliability and flexibility of distribution networks. Prefabricated substations can be flexibly arranged in various areas according to urban planning and electricity demand, and supply stable electricity for residents' lives, commercial activities and industrial production. For example, in new residential areas, commercial centers, industrial parks and other places in cities, prefabricated substations have become the first choice for distribution equipment.

2. Rural power grid transformation

Rural power grid transformation is a key measure to improve the level of rural power supply. Prefabricated substations have the advantages of small size, convenient installation and low cost, and are extremely suitable for promotion and application in rural areas. By installing prefabricated substations, the power supply quality of rural power grids can be improved, the power supply reliability can be improved, and the needs of rural economic development and farmers daily electricity consumption can be met. For example, in some remote rural areas, prefabricated substations can provide strong power support for agricultural production, agricultural product processing and rural infrastructure construction.

3. Industrial enterprises

Industrial enterprises have a large demand for electricity and have high requirements for power supply quality and reliability. Prefabricated substations can provide customized power solutions for industrial enterprises. According to the production process and equipment characteristics of the enterprise, select appropriate transformer capacity and electrical equipment to ensure that the enterprises production power demand is met. At the same time, the intelligent function of the prefabricated substation can also realize real-time monitoring and management of the enterprises electricity consumption, helping enterprises to reduce electricity costs and improve production efficiency. For example, in large industrial enterprises such as steel, chemical, and machinery manufacturing, prefabricated substations play an important role.

4. Renewable energy power generation

With the rapid development of renewable energy, such as wind power generation and photovoltaic power generation, prefabricated substations have also been widely used in the field of renewable energy power generation. In wind farms and photovoltaic power stations, prefabricated substations can boost and distribute the electric energy generated by the generator and then connect it to the power grid. Its integrated and intelligent characteristics can adapt to the intermittent and volatile nature of renewable energy power generation and improve the transmission and utilization efficiency of electric energy.