Transformers Powering India’s Renewable Energy Revolution
As India accelerates grid modernisation, investing in advanced, efficient and smart transformer infrastructure will be critical to ensuring that the renewable transition is not just rapid, but reliable, resilient, and future-ready.
March 06, 2026. By News Bureau
But behind this visible transformation lies an invisible enabler: transformers. While generation capacity gets attention, the ability to deliver renewable energy reliably to demand centres is what defines success, and transformers quietly make that possible.
Since renewable generation is often located far from major load centres, power evacuation depends on a robust transmission backbone. In Pavagada’s case, renewable power is pooled through substations and stepped up to transmission voltages, with evacuation supported through multiple 400 kV corridors/lines. This is a practical demonstration of how transformers serve as the essential bridge between renewable generation and grid-scale delivery, ensuring stability, efficiency, and a predictable flow of clean energy.
India’s renewable energy sector is undergoing a transformative shift. With ambitious targets to achieve 500 GW of non-fossil fuel-based energy by 2030, India has already made significant strides, surpassing 226 GW of installed renewable energy capacity. The rapid scale-up of utility-scale solar and wind projects, supported by the accelerated rollout of Green Energy Corridors, is pushing India closer to a cleaner and more resilient energy future. However, as India continues its renewable energy journey, the national priority is shifting from simply adding generation to strengthening the backbone of the transition, grid readiness.
In this landscape, transformers are no longer auxiliary equipment. They are strategic assets that enable renewable integration, support voltage stability, manage dynamic power flows, and strengthen the resilience of India’s evolving grid.
Backbone of Renewable Power Transmission
India is focusing on developing renewable energy zones and large-scale solar parks, including Bhadla Solar Park (2.25 GW), Pavagada Solar Park (2.05 GW), and projects at Khavda and Leh. These zones, often located far from demand centres, require efficient power transmission. To transport power over long distances, it's stepped up from substation voltages to 220 kV, 400 kV, and 765 kV, depending on the power and distance. At load centres, the voltage is then stepped down for local distribution.
The National Electricity Plan (NEP) outlines a target of adding 776,330 MVA of transmission capacity by FY2027, with approximately 30 percent already achieved as of early 2026. This expansion strengthens grid evacuation to support India's renewable energy push toward 500 GW by 2030, enabling smoother integration of new capacity. As renewable penetration deepens, transformers will play an increasingly pivotal role in ensuring efficient power evacuation, maintaining voltage stability, and strengthening overall grid reliability.
Enabler of Grid Stability and Flexibility
Renewable energy generation, especially from solar and wind, is inherently variable due to weather patterns, time of day, and seasonal shifts. This variability creates dynamic load profiles and can lead to voltage fluctuations, putting additional stress on grid stability, ranging within tight frequency and voltage bands. In response, transformers equipped with on-load tap changers, harmonic filters, and advanced sensors have become essential for managing the increasingly complex flow of power, including bidirectional flows from distributed sources (prosumers) back into the grid. These capabilities help maintain voltage regulation and improve real-time grid balancing, reducing the risk of disturbances.
The rise of extreme weather events and rapid urbanisation has further intensified stress on India’s power network. As a result, grid resilience is now a strategic priority, and transformers must be designed not only to maintain efficiency but also to operate reliably under evolving conditions such as fluctuating loads, temperature variations, and grid congestion. Their ability to perform consistently under demanding conditions is critical to maintaining system reliability and preventing outages.
Supporting Large-Scale Integration
India’s renewable energy capacity is expanding rapidly, with 92 GW of solar and 51 GW of wind installed. Supporting this growth, inverter-duty transformers (with a CAGR of 11.1 percent) are critical for integrating solar power into the grid, while transformers are also enabling smoother evacuation and balancing as hybrid (solar + wind) projects scale up. With an INR 70,000–75,000 crore investment pipeline planned for transmission and distribution (T&D) modernisation over the next few years, transformer demand is expected to surge, pushing industry sales beyond INR 40,000 crore by FY2026, driven by grid upgrades, replacement of ageing units, and deployment of higher-capacity transformers to support rising renewable integration, including emerging offshore pilots.
Driving Efficiency and Future-Proofing
A major trend in transformer technology is the adoption of amorphous core transformers, which reduce energy losses by 70-80 percent compared to traditional models. These transformers are especially relevant in renewable-dominated grids, where improving efficiency across the network becomes critical as generation patterns turn more variable. Moreover, ester-based fluids are increasingly used to enhance transformer safety and reliability, owing to their higher fire point and lower fire risk compared to traditional mineral oil-based transformers.
As India accelerates the adoption of battery energy storage systems (BESS), electric vehicles (EVs), and green hydrogen initiatives, grid power flows will become more dynamic and multi-directional. Advanced transformers, capable of managing complex, variable loads and providing real-time data for grid optimisation, will be essential to support 24/7 renewable power integration, strengthen grid resilience, and ensure long-term system stability.
Smart Grid Integration and Digitalisation
The shift towards smarter, digitalised grids is reshaping the transformer landscape, with advanced monitoring and predictive maintenance capabilities increasingly being embedded into transformers. This enables utilities to anticipate faults, optimise performance, and respond faster to grid disturbances, especially critical in renewable-heavy networks where generation is variable. Smart transformer integration also improves grid visibility and operational flexibility, helping utilities dynamically manage power flows while strengthening grid stability and resilience against extreme weather, urban load spikes, and seasonal demand swings.
Transforming India’s Clean Energy Future
Transformers are no longer just auxiliary components; they are strategic enablers of India’s renewable energy revolution. From evacuating power from remote solar parks to managing variability, voltage stability, and bidirectional flows, transformers form the backbone that makes large-scale renewable integration possible. As India accelerates grid modernisation, investing in advanced, efficient and smart transformer infrastructure will be critical to ensuring that the renewable transition is not just rapid, but reliable, resilient, and future-ready. By recognising the central role of transformers in grid modernisation, India can ensure that its renewable energy revolution is not only ambitious but also resilient and sustainable for generations to come.
- Satyen Mamtora, CEO and MD, Transformers and Rectifiers (India) Ltd. (TARIL)
please contact: contact@energetica-india.net.
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