![[image]Wide-Area Distributed Supervisory Control System](/products/it/control_sys/ems/image/img_wide_area.png)
IED：Intelligent Electronic Devices
IP：Internet Protocol
Electric power grid operation (supervisory control) centers are established for each voltage level, region and function. When multiple operation centers are integrated to achieve work efficiency, the location of the supervisory control system for each center can be freely-placed, facilitating the integration.
Many power grid supervisory control systems that have been independently established for each hierarchy level, region and function can be integrated and consolidated.
One main and one backup data center are commonly established for multiple systems.
Multiple management centers that have been independently established for each system can be integrated into one center.
