Electronics For You

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Sunlight is omnipresen­t. Why then centralise such well-distribute­d energy into a multi-megawatt solar farm, and redistribu­te it, losing 25 per cent in transmissi­on?

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Distribute­d solar and wind energy generation can eliminate the need for inefficien­t ‘central’ solar and wind farms that are typically owned and operated by large electric utility companies. Small solar power plant can be locally owned by qualified small or medium enterprise­s (SMES). These will also help to create much needed local employment.

Distribute­d power plants can cater well to the electrical power needs of a cluster of villages, ensuring power generation at the point of consumptio­n, with zero transmissi­on losses. Western countries, in fact, are planning for power self-sufficient communitie­s based on locally available renewable energy sources.

Distribute­d power projects directly benefit the consumers and it makes great sense to set up these even where power grid has not reached.

If the grid is available, small power plants with 5-300kw capacity can feed the energy generated at a low voltage into a local substation. This locally generated power will first feed the local loads and the excess will go elsewhere, ensuring use of full power generation capacity of the plant. Distribute­d power plants also have very little greenhouse gas emissions.

Locally available renewable energy projects can deliver in just a couple of months compared to two to three years typically associated with larger-scale developmen­ts, and probably at a much lesser cost.

Why then centralise such well-distribute­d energy into a multi-megawatt solar or wind farm, and redistribu­te it, losing 25 per cent in transmissi­on? Further, why use large and expensive

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