INTRODUCTION
Smart Grid is sophisticated, digitally enhanced power systems where the use of modern communications and control technologies allows much greater robustness, efficiency and flexibility than today’s power systems.
The American Electric Power Research Institute (EPRI), an advocator of building the smart grid, gave this grid a definition with self-healing, security, integration, collaborative, forecast, optimization and interaction. While European commission define it as : A grid which could support distributed and renewable energy access, supply more reliable and secure electricity, have a service-oriented architecture and flexible grid applications, possess an advanced automation and distributed intelligent, be able to local interact the load and the power, adhere to customer centric.
Obviously, these definitions has been formulated for the future of power industry mainly focusing on world today’s energy generation, transmission, distribution limitation & changing consumer trends. Recently world has observed a series of blackout, partial power failure and this compelled the world’s nations to go for an ideal grid system that is smart enough to face such kind of challenges. This has resulted the unification of power system with the information technology & modren telecommunition setup. And SELF HEALING become the key component of smart grid, as smart grid should possess an intelligent control funtion, which could rapidly isolate and self recover the fault, prevent the occurance of balckout and improve the reliability of grid operation with minimum human intervention & consume distributed generation too.
Background:
An especially illuminating event occurred in 1879 when Thomos Edison invented what is considered to be the precursor of modern light bulb. Three years later, in 1882, he flipped the first switch on the first electric grid in lower Manhattan. In less than 100 years, electricity became widely
References: 1- Anticipates and Responds to System Disturbances (Self Heals) v2.0 2- Smart Grid—Building on the Grid (www.nema.org/smartgrid). 3- IEEE papers(The Application of Self-healing Technology in smart grid & The Self-healing Technologies of Smart Distribution Grid ) 4- http://www.oe.energy.gov/eac.htm 5- IEEE paper smart grid initiative for power distribution utility in India.