Draft National Wind-Solar Hybrid Policy
Need for a hybrid policy
- India has set an ambitious target of reaching 175 GW of installed capacity from renewable energy sources including 100 GW of solar and 60 GW from the wind by the year 2022.
- Solar and wind power being infirm in nature impose certain challenges on grid security and stability.
- Studies revealed that solar and winds are almost complementary to each other and hybridization of two technologies would help in minimising the variability
- It helps in the optimal utilisation of the infrastructure including land and transmission system.
- Superimposition of the wind and solar resource maps shows that there are large areas where both wind and solar have high to moderate potential
- Existing wind farms have the scope of adding solar PV (Photovoltaics) capacity and similarly there may be wind potential in the vicinity of existing solar PV plant.
Objective of the policy
- the main objective of the Policy is to provide a framework for the promotion of large grid connected wind-solar PV system for optimal and efficient utilisation of transmission infrastructure and land, reducing the variability in renewable power generation and thus achieving better grid stability.
- The goal of the Policy is to reach a wind-solar hybrid capacity of 10 GW by 2022.
Wind-Solar Hybrid Systems
- The Wind and Solar PV systems will be configured to operate at the same point of grid connection.
- On the technology front
- In the case of fixed speed wind turbines connected to the grid using an induction generator, the integration can be on the HT side at the AC output bus.
- In case of variable speed wind turbines deploying inverters for connecting with the grid, the integration can even be on the LT side before the inverter i.e. at the intermediate D.C bus
- The implementation of wind solar hybrid system will depend on different configurations and use of technology detailed below:
Hybridization of existing wind/solar PV plants
- Existing wind power or solar power projects, willing to install solar PV plant or wind turbine generators (WTGs) respectively to avail benefit of hybrid project, may be allowed to do so
New Wind-Solar Hybrid Plants
- In the case of new wind-solar hybrid projects, the developer has the option to use the hybrid power for captive use or third party sale or may sell the hybrid power to Distribution Company. The hybrid power may be procured through a transparent bidding process under different mechanisms
- The Central Commission should lay down the guidelines for determination of generic tariff for wind-solar hybrid system
- Low-cost financing for hybrid projects may be made available through Indian Renewable Energy Development Agency (IREDA) and other financial institutions including multilateral banks.
- The government will support the technology development projects in the field of hybrid systems.