Why Has the "Three-Compartment Separation" Become the Industry Standard for Box Type Substations?

In modern power systems, box type substations, as key equipment for efficient power distribution, directly affect the reliability and safety of power supply. Among them, the "three-room separation" structure, which sets the high-voltage room, transformer room, and low-voltage room independently, has become a widely recognized standard configuration in the industry. This design is influenced by several key factors.

From a safety perspective, "three-room separation" provides reliable isolation protection. The high-voltage room is usually equipped with high-voltage devices such as SF6 load switches and current-limiting fuses. During operation, these devices' high voltage and large current conditions may cause dangerous arcs. According to relevant technical standards, when the altitude does not exceed 1000m, the clear distance between conductors in the high-voltage room and the ground, as well as between different phase conductors, should not be less than 125mm. Moreover, it should have complete "five-prevention" functions to prevent misoperation, significantly reducing safety risks and protecting personnel and equipment safety.

In terms of maintenance convenience, the independent design of the three rooms has obvious advantages. The operating characteristics and maintenance cycles of equipment in different rooms are different. The distribution transformer in the transformer room generates a large amount of heat during operation, and it is necessary to regularly check the heat dissipation and oil level. The low-voltage room's low-voltage distribution equipment focuses more on the maintenance of line connections and the on-off status of switches. When equipment in a certain area fails, maintenance personnel can directly repair it in the corresponding room without completely cutting off the power, reducing the impact on surrounding power supply and improving maintenance efficiency and reducing operating costs.

In terms of functional optimization, the "three-room separation" structure enables each room's functions to be fully exerted. The high-voltage room is mainly used for high-voltage power access and control. The transformer room is mainly used for efficient voltage conversion, and the low-voltage room is responsible for precisely distributing low-voltage power to various power consumption terminals. This specialized division of labor avoids the interference between different functional equipment, ensuring the stability and efficiency of power conversion and distribution. In places with extremely high requirements for power supply stability, such as data centers,"three-room separation" box type substations can ensure continuous and stable power supply, thereby meeting the high-load operation requirements of equipment.

From the perspective of development trends, with the growth of power demand and technological progress, box type substations are constantly expanding and upgrading. The modular structure of "three-room separation" provides convenience. When the power load increases, the equipment in a certain room can be replaced or expanded as needed. For example, in commercial areas, the low-voltage room's distribution equipment can be flexibly expanded to cope with the increase in power consumption due to the increase in the number of shops, thereby meeting the power distribution needs of different scenarios and enhancing the applicability and flexibility of box type substations.

Due to its outstanding advantages in safety assurance, maintenance convenience, functional optimization, and development adaptability," three-room separation" has become the industry standard for box type substations, laying a solid foundation for the reliable operation of modern power systems.

In modern power systems, the "three-compartment separation" of box type substations has become an industry standard. Efforts have been made in multiple aspects such as safety, maintenance, functionality, and development, laying a solid foundation for the reliable operation of power.