Managing variability of the Sun

The aggressive push by the Central Government to shift towards renewable sources of power generation will not yield desired results if flexibility in projects and cost effective storage is not available to all states.  When it comes to solar radiance, geographically all states are not alike.  States with higher potential require attention from all aspects in comparison with other states.  States like Andhra Pradesh, Gujarat, and Rajasthan offer immense solar potential.  Solar power plants in Rajasthan, for example, have already earned a place on the solar map of the world.  The state has set an excellent example for others to imitate.

The enthusiasm that this sector has generated is remarkable.  The recent developments as the pricing of solar-based power have approached grid parity, and the international solar alliances have spread a lot of positivity in the environment.

The efforts of the solar power plants in Rajasthan are an encouraging development for all, after all, energy generated without environmental emissions is much needed.  Fulfilling the nation’s energy needs in an environment-friendly way is a welcome sign. 

The brisk penetration of solar energy into the grid calls for significant planning and up gradation in the grid and distribution network infrastructure.  Solar power plants in Rajasthan at one side are contributing towards the commitment of “24 hours supply of adequate and uninterrupted power” but alongside are exposing the infrastructural bottlenecks as well.

5 MW Bikaner Rajsthan Plant- Rays Power Infra


The problem stems from the fact that since this form of electricity generation is sun based therefore the production is variable in nature.  During evening or nighttime, cloudy, or foggy days, there is an interruption in the power generation.  This rapid fluctuation is something, which requires handling from the utilities. They need to perform a balancing act all the time between the demand and supply side at the grid level.  The challenge increases further in proportion in light of more and more of solar plants coming up.

This problem of balancing the demand and supply at the grid level is not only due to the solar power plants in Rajasthan, but the issue also existed before this renewed focus on renewable sources of power generation. Earlier when the demand for electricity peaked especially during the summer season, balancing requirements emerged from market variation.  Load balancing is done by relying on other or conventional sources of power when the demand exceeds the supply.


The emerging scenario can be better managed by investing simultaneously in cost effective storage solutions of mega-scale where the excess power can be stored during low demands or excess energy production. 

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