Four key technologies were deployed in the digital foundation :
• The edge computing unit ( ECU ) integrated multiple terminals in the transformer district and functions as the smart brain of the edge . Powered by the cloud , the ECU enables edge devices to be quickly upgraded online . This has enabled transformer district managers to become creative mini CEOs .
• Optical fibre and wireless networks were deployed for backhaul . Building a reliable distribution backhaul communication network can be a significant challenge . Optical fibres can be deployed in cities and strategic areas to support real-time access of services . In wide-coverage areas , communication backhaul can be implemented through carrier public networks or wireless private networks .
• High-speed power line carrier communication ( HPLC ) dual-mode technology solved the problem of lastmile communication . HPLC can deliver 99.9 % communication reliability , which supports minute-level data collection and second-level control for lowvoltage transparency .
• A cloud-based , unified enterprise digital platform acts as the smart OS . By building the enterprise-level unified data foundation , unified AI model factory , and unified IoT platform , State Grid Shaanxi was able to leverage these knowledge assets .
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