Smart grid system

A smart grid is a modern electricity network that uses digital communication, sensors, automation and information technology to monitor and control the flow of electricity and information between suppliers and consumers in both directions, to improve reliability, efficiency and sustainability.

 Generation --> Transmission --> Distribution --> Consumers
 (incl. solar,     sensors/PMU      smart meters     (prosumers)
  wind) <======= Two-way power and data ===========>
              Control centre (SCADA, AI, analytics)

Principal characteristics

1. Two-way communication of power and data between utility and consumer.
2. Smart meters / advanced metering infrastructure (AMI): real-time usage and time-of-use tariffs; remote reading.
3. Self-healing and automation: detects faults and isolates them, quickly restoring supply (fewer outages).
4. Integration of renewable and distributed generation: rooftop solar, wind, batteries and EVs; consumers can also sell power (prosumers, net metering).
5. Demand response and load management: consumers shift use away from peak hours, which reduces peak demand.
6. Efficiency and lower losses: better monitoring reduces technical and commercial losses and theft.
7. Cyber-security and data privacy.
8. Energy storage and EV integration (vehicle-to-grid).
9. Better power quality and resilience with wide-area monitoring (PMU).

Relevance to Nepal

NEA is installing smart meters and SCADA, and has plans for grid modernisation, which helps loss reduction, regional power trade and integration of solar and hydropower.