One very big reason ‘Rooftop Solar’ would be a roaring success in the distributed segment is because of the Net Metering Policies and Guidelines that are currently in place for most states of India (20 states and 6 Union Territories). We have seen its successful application in Delhi (refer) and applications being submitted in various other states as well.
However, a very big concern relating to having ‘net-metered’ connections is that it interacts with the grid. With current capacity of 275 GW (refer), 100 GW is bound to create some interference or instability in the Grid. Recently, Power Minister Piyush Goyal expressed his keen interest of benefitting from Australia’s rooftop solar expertise (refer). He mentioned, how he would like to use their expertise for better ‘Scheduling and Forecasting’ of solar energy in India.
Scheduling: The mechanism used by power generators to produce a certain amount of power and inject it in the grid.
Forecasting: This is the mechanism by which State Load Dispatch Centres predict how much power will flow through the National Grid.
Scheduling would be requirement for bigger plants that sell on ‘Open Access’ basis, however, this is not a requirement for smaller plants, perhaps below a Megawatt. For smaller plants, only forecasting will play a role. But the whole idea of this is to prepare the grid for ‘variable’ power which in this case is Solar, since it is dependent on the sun.
Scheduling and Forecasting is primary to integration of renewables to the grid  for which technology transfer will take place through a collaboration between India and Australia. University of New South Wales, where the power minister expressed his interest, has pioneered research in Renewable Energy and its partnership would be useful for Indian organizations.
If this partnership takes place in a timely manner, we can expect solar capacity to add up easily with easy connection to the grid. Since, all the capacity needs to be added by 2022, it is imperative that methods for scheduling and forecasting are implemented before that.
 An electric grid is a network of synchronized power providers and consumers that are connected by transmission and distribution lines and operated by one or more control centers. When most people talk about the power “grid,” they’re referring to the transmission system for electricity. (source)
The reason for this is that ‘Solar’ is variable in supplying power. So, even when 100 GW is connected, it could generate absolutely no electricity or it could generate electricity more than expected. This is because it depends on the intensity of the sun. Since, 100 GW is a large proportion, the grid and the transmission lines need to be prepared to handle that kind of power. If more than expected power is fed to the grid, then there is a chance that the grid will trip resulting in a blackout.
About The Author:
Tanya Batra works with Sunkalp Energy and keeps a close watch at the developments in the Solar Industry and Policy and Regulatory analysis. Sunkalp Energy functions as an aggregator for facilitating an exchange between industry stakeholders in an effort to organize the industry.
(Disclaimer: This is a guest post submitted on Techstory by the mentioned authors.All the contents in the article have been provided to Techstory by the authors of the article. Techstory is not responsible or liable for any content in this article.)