A Smart Mini-Grid (SMG), or Micro-Grid, is an intelligent electricity distribution network, operating at or below 11 KV, where the energy demand is effectively and intelligently managed by diverse range of Distributed Energy Resources (DERs) such as solar PV, micro-hydro power plants, wind turbines, biomass, small conventional generators such as diesel gensets etc in combination with each other through smart control techniques.
Globally, managing existing energy resources and demand in an optimal and efficient manner has become the need of the hour. Enhancing energy-security and energy-access, particularly in emerging economies is one of the major challenges that one has to deal with. Smart grid has been evolved as one of the solutions to tackle these challenges. Advanced sensing, communication and control technologies are used in smart grids these days for not only generation and transmission of power but also distribution and utilization of electricity in a more intelligent and effective manner.
Such an application will not only foster the effective inter-connection and utilization of multiple renewable energy resources but would also help in advancing access to energy to the last mile in the most optimum way by improving the efficiency of the overall system. The Smart Mini-Grid system has a great potential in large commercial and industrial complexes, hospitals, shopping malls/ complexes, apartments, residential complexes, educational institutions, remote un-electrified as well as electrified locations to ensure maximum flexibility, reliability and safety.
The project was sanctioned to TERI under the aegis of Asia-Pacific Partnership on Clean Development and Climate (APPCDC) in March, 2009 with the contribution of Rs.87 lakhs from the Ministry of New & Renewable Energy. The project was completed with the technical collaboration of the Solar Energy centre under the Ministry of New & Renewable Energy. The smart mini grid has been deployed at TERI Retreat building in which 3.2 kW wind generator, 10.5 kW solar PV power, 1 kW thin film, 2 kW SPV systems, 100kW biomass gasifier and diesel generator have been integrated to demonstrate optimal evacuation of renewable power.