High-voltage substations serve as the core hubs of power systems, responsible for converting high-voltage electricity from transmission networks into medium-low voltage electricity suitable for urban, industrial, and residential power supply.​​ Key equipment includes power transformers, high-voltage switchgear (GIS/HGIS), circuit breakers, disconnectors, relay protection devices, and intelligent monitoring systems (SCADA). Through modular design, they achieve efficient and reliable energy conversion and distribution.

​​Employing fully-enclosed combined apparatus technology and multi-level insulation protection systems, these substations significantly reduce land footprint while offering explosion-proof, pollution-resistant, and short-circuit-withstanding capabilities.​​ Intelligent online monitoring systems analyze equipment conditions in real-time, automatically diagnose faults, and enable remote operation and maintenance, substantially enhancing power supply stability and grid intelligence.

​​Suitable for voltage levels ranging from 110kV to 500kV, they are widely deployed in key sectors such as renewable energy grid integration, urban grid modernization, and large-scale industrial parks, ensuring safe and efficient electrical energy transmission.​