Opinion: Role of Hybrid Energy Solutions in Providing Continuous and Uninterrupted Energy Supply

With an approximate pace of ~20 GW Renewable capacity addition in the years, India aims to significantly boost its capacity, targeting an ambitious 500 GW non fossil fuel-based energy production by 2030. India’s installed non-fossil fuel capacity has increased 396% in the last 8.5 years and stands at more than 204 GW (including large Hydro and nuclear), about 45.5% of the country’s total capacity (as of Jun 2024). In the quest for sustainable development and energy security, hybrid energy solutions are emerging as a cornerstone in India’s power generation landscape. By seamlessly integrating multiple energy sources, these systems provide a reliable and continuous energy supply, addressing the intermittent nature of renewable energy and enhancing grid stability.

India stands 4th globally in Renewable Energy Installed Capacity following China, US & Germany. Solar and wind power, the key to India’s energy transition, are intermittent by nature. In the recent 3-4 years, growth has been driven by a shift from standalone wind or solar projects to integrated “Wind-Solar” and “Wind-Solar-Battery” hybrid projects. These projects are designed to meet demands for firm and dispatchable renewable energy (FDRE), round-the-clock (RTC), and peak power.

This article delves into the critical role of hybrid energy solutions, exploring the opportunities they present and the challenges that lie ahead.

Opportunities

1. Enhancing Reliability and Stability

Hybrid energy systems combine Solar and wind with traditional power generation and advanced storage solutions. This integration mitigates the variability of renewables, ensuring a more consistent power supply. Solar power is harnessed during the day, while wind energy is utilized at night. When combined with battery storage, these systems can store excess energy during periods of high generation and release it during low production periods, thus providing uninterrupted energy.

• Optimized Resource Utilization

India is blessed with abundant renewable resources more than 700 GW of Solar and Wind each. Hybrid energy solutions maximize the utilization of these resources by balancing the strengths of different energy sources. Solar and wind power complement each other, with solar energy peaking during the day and wind energy often stronger at night. This synergy optimizes the overall LCOE, reducing dependency on any single source and enhancing the efficiency of power generation.

• Grid Resilience and Flexibility

The integration of hybrid energy solutions significantly improves grid resilience and flexibility. These systems provide the ability to manage peak loads and mitigate the impact of power outages. Advanced grid management technologies, such as smart grids, enable better monitoring and control, ensuring a stable and reliable energy supply even during fluctuations in demand.

• Economics 

Hybrid energy systems lead to capex savings through common Pooling Substations and EHV lines for Solar – Wind – BESS. Integrating energy storage solutions ensures that energy is available when needed, reducing the need for cost-intensive peaking power plants. Additionally, the decreasing costs of renewable energy technologies and storage solutions make hybrid systems increasingly economically viable.

• Remote Energy Access

Hybrid energy solutions play a crucial role in providing reliable power to remote and underserved areas in India. Off-grid hybrid systems, which combine solar, and battery storage, can ensure continuous energy supply to regions where extending the grid is challenging. This enhances energy access and supports socio-economic development in rural and remote areas.

• Technological Advancements

Rapid advancements in technology are enhancing the Wind Turbine, PV panel efficiency, and reliability of hybrid energy systems. Innovations in energy storage, smart grids, and predictive maintenance are optimizing energy management and distribution. These technological improvements are crucial for overcoming the challenges associated with integrating multiple energy sources and ensuring continuous energy supply.

• Attracting Investments

The hybrid energy sector in India is attracting significant investments from both domestic and international players. Increased funding and interest in renewable energy projects are accelerating the deployment of hybrid solutions. This influx of investment is essential for expanding the infrastructure and capacity needed to support continuous and uninterrupted energy supply.

• Enhanced Energy Security

Diversifying the energy mix with hybrid solutions enhances energy security by reducing dependency on a single energy source. This diversification mitigates risks associated with fuel supply disruptions and price volatility. Hybrid systems provide a more stable and secure energy supply, which is crucial for supporting India’s economic growth and development.

Despite the numerous opportunities, there are several challenges to the widespread adoption of hybrid energy solutions in India. High initial costs, regulatory and policy hurdles, technological integration issues, and grid infrastructure limitations pose significant barriers. Additionally, efficient and cost-effective energy storage remains a critical component that requires further development.

Securing financing for hybrid energy projects is challenging due to perceived risks and uncertainties. Skilled workforces are also crucial for the successful implementation of hybrid energy systems. Addressing these challenges through supportive policies, technological innovation, and investment in education and training is essential for the growth of this sector.

Grid operators, who are used to managing demand-side variability, now face challenges with this new supply-side intermittency. They are now insidiously shifting this operational intermittency risk to renewable energy (RE) generators, leading to the emergence of various tender designs, such as Round-the-Clock (RTC), Flexible Dispatch RE (FDRE), and load-following tenders. These tenders demand near-flexible, load-following profiles from RE generators, increasing the complexity of these projects. RE generators are responding to such tenders by selecting suitable generation sites, generously oversizing capacities, and blending solar and wind with BESS (Battery Energy Storage System). This is resulting in the following inefficiencies:

• Excess Generation: Oversizing leads to excess generation, especially from cheaper solar power, and since exchange realization for this surplus power is low – it is pushing up the bid tariffs.
• Bias Against Storage/Wind: It’s cheaper to oversize than to invest in costlier storage, leading to underutilization of storage. Also, since the LCOE of solar is lower than that of wind the bidding models cause a bias against wind in the mix.
• Co-Location Bias: The bidding paradigm also biases models towards Co-locating solar and wind increasing congestion at sites resource-rich for both solar and wind pushing up land costs and causing transmission congestion.
• Penalties and Curtailment: Oversizing leads to higher curtailment, with power curtailed to be within the Transmission corridor’s capacity. This further raises bid tariffs.

The increasing complexity of tenders is not a sustainable solution and is causing inefficiencies and higher power tariffs. Grid operators and Discoms need to aggregate wind – solar- BESS hybrid pooled power at grid level, not generation plant to avoid oversizing which results in higher capex and tariff, also higher DSM penalties. Doing so will only lead to inefficiency and higher costs for consumers.

Conclusion

Hybrid energy solutions hold immense potential for providing a continuous and uninterrupted energy supply. By enhancing reliability, optimizing resource utilization, improving grid resilience, and reducing carbon footprint, these systems are key to achieving sustainable development and energy security. While challenges remain, the opportunities are vast, and with the right strategies and investments, hybrid energy solutions can play a pivotal role in India’s energy future.

By Deepak Khare, Head of Projects, BluPine Energy