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| Last Updated:: 04/11/2015


Energy security and environmental Sustainability are vital to our future. Energy security is very important for economic growth.  Renewable energy sources are essential in view of the depleting nature of conventional energy resources.  Electricity is a critical infrastructure for sustainable growth of economy. Power development is an important input for the States Industrial, Commercial and Socio economic growth. For this, the availability of affordable, reliable and quality power is necessary. Therefore, adequate provision has to be made for augmenting power supply to bridge the gap between demand and supply as well as to meet the increasing future demand. Keeping this in view, Government is giving utmost importance to power sector in Tamil Nadu.
Tamil Nadu has one of the best power utilities in the country and the power sector in the State has grown manifold in capacity generation. All the villages and the towns are fully electrified
Present Status of Demand – Supply: 
            The present average demand of power in the State is around 12500-12700 MW. It is expected to go upto 13,800 MW by the end of 2015-16. This demand will be met by generation from existing power stations and power projects to be commissioned in the year 2015-16. All time high peak demand of 13,775 MW was met by TANGEDCO on 24.06.14 and energy consumption of 303.039 MU was met on 08.07.2015  At present this deficit is managed through power purchase and Restriction and Control measures. TANGEDCO is taking several steps to bridge the gap between demand and supply to provide uninterrupted power supply to the consumers.
Installed capacity
The installed capacity of conventional energy sources of Tamil Nadu Generation and Distribution Corporation Limited is 13941.44 MW as on 31.08.2015 which includes TANGEDCO‚Äüs Hydro (2298.4 MW), Thermal (4660 MW), Gas Stations (515.88 MW), share from Central Generating 9 Stations (5509 MW), Private Power Projects (958.16 MW). The installed capacity of non-conventional energy sources as on 31.08.2015 (infirm power) is 8533.26 MW which includes generation from wind (7470.86 MW), Solar (173.00 MW), Biomass (230.00 MW) and Co-generation plants (659.40 MW).
The State is blessed with various forms of renewable energy sources. The environment-friendly renewable energy sources are perennial in nature, available locally and quite suitable for decentralized applications. The important renewable energy sources are as follows:
• Wind Energy (including offshore wind)
• Solar Energy
• Biomass and other forms of bio energy
• Small Hydro
• Tidal Energy
• Ocean Thermal Energy
Among the above mentioned sources, the first three renewable energy sources, viz., wind, solar and bio energy are being harnessed in a big way in India and also in Tamil Nadu. With a view to develop and propagate the non-conventional sources of energy, the Tamil Nadu Energy Development Agency (TEDA) was formed. Apart from serving as a coordinating agency to promote and harness the use of renewable energy sources, TEDA acts as nodal agency to the Ministry of New and Renewable Energy (MNRE), Government of India to implement centrally funded and sponsored schemes in the state.
Present Scenario – Renewable Energy Sources
The total installed capacity of power generation from renewable energy sources in Tamil Nadu is 8533.26 Mega Watt (MW) as on 31.08.2015, which includes wind (7470.86 MW) and co-generation (659.40 MW) and biomass power (230 MW), solar (173 MW).
Tamil Nadu is an undisputed leader in renewable energy in India. The total renewable energy installed capacity as on 31.08.2015 is 8533.26 MW, which is 23.29% of the Country’s renewable capacity. The installed capacity of renewable energy in Mega Watt term is 36.96% of the total installed capacity of the State. In terms of energy generation, 14.07% comes from Renewable energy in the State. This is significantly higher than the contribution of renewable energy in the country, which is 9.28%.
In the State, the contribution to the installed capacity is highest from wind energy, followed by biogases-based cogeneration plants in sugar industries. This has largely come through private investments encouraged by policy initiatives of the Central and the State Governments.
Wind Energy
Wind energy is one of the cleanest renewable sources of power. The potential area that are suitable for establishment of wind generators are mostly confined to the southern (Aralvoimozhi pass and Shengottai pass) and south western (Palghat and Cumbum pass) parts of the State. Total installed capacity under wind mill generation is 7470.86 MW. Tamil Nadu tops in harnessing resources of energy among all Indian States of the installed capacity, thus making it a clear leader in the wind energy sector.
Solar Energy
Tamil Nadu Solar Energy Policy 2012 aims at generating 3000 MW of solar power by 2015 with a vision of developing the State as a world leader in Solar Energy. This will be achieved through Utility Scale Projects (1500 MW), Rooftops (350 MW)
Tamil Nadu has a very good solar potential with 300 clear sunny days as it receives very high solar radiation. The Solar Photo Voltaic (SPV) technology which enables the direct conversion of sun light into electricity has several distinct advantages, since it does not have moving parts, produces no noise or pollution, requires very little maintenance and can be installed anywhere. These advantages make them an ideal power source for use especially in remote and isolated areas which are not served by conventional electricity, making use of ample sunshine available in the State. SPV technology provides for decentralized installations thereby minimizing the need for transmission infrastructure. Similarly Solar Thermal with potential for storage is yet another very good solar technology.
Realizing the importance and need for large scale promotion of solar energy in the country, the Government of India had announced Jawaharlal Nehru National Solar Mission (JNNSM). JNNSM is an important program of the Government of India under Renewable Energy sector and aims at establishing India as a global leader in solar energy by creating policy conditions for its diffusion across the country. It is the major initiative to promote ecologically sustainable growth while addressing India’s energy security challenge. This mission has been launched with a view to achieve 22000 MW of solar capacity by the year 2022 which is to be implemented in 3 phases for throughout India. Phase I of the Mission has a target to achieve 1000 MW of installed capacity. Of the State target of 22MW, 12 MW has been commissioned in Tamil Nadu
Biomass Energy
Bio-mass produced by green plants through photosynthesis using sunlight, contains organic matter which could be converted to energy. Biomass can be obtained by raising energy plantations or may be obtained from organic waste. The biomass resources can be used in bio-energy technologies viz., biogas, gasifier, biomass combustion, cogeneration, etc., to produce energy-thermal or electricity. Biomass can be used in three ways – one in the form of gas through gasifiers for thermal applications, second in the form of methane gas to run gas engines and produce power and the third through combustion to produce steam which drives a turbine to generate electricity. Biomass combustion - The total installed capacity of the Grid interactive Biomass power projects in the State as on 31.08.2015 is 230 MW.
Source: policy note 2014-2015, 2015-2016 and energy department -TANGEDCO