The Central Electricity Authority has proposed converting 151 coal-fired units into flexible power sources by 2030 to stabilize the grid as renewable energy usage grows. This transition aims to provide 24 GW of flexible capacity at an estimated cost of ₹30,200 crore. Investors are monitoring this shift as major players like NTPC raise concerns regarding long-term equipment wear and potential maintenance costs from frequent operational cycling.
The Central Electricity Authority (CEA) has proposed a significant operational shift for India’s thermal power sector to better accommodate the growing share of solar and wind energy. The plan targets 151 older coal-fired units, representing a total capacity of 34.5 GW, to transition into flexible, two-shift operations by 2030. This strategy aims to unlock 24 GW of flexible power, which serves as a vital tool to stabilize the grid when renewable energy production fluctuates.
Moving from a traditional baseload model—where coal plants run at steady levels—to a flexible model requires plants to ramp up and down frequently, a process known as cycling. Officials argue this approach is more cost-effective than installing large-scale battery storage systems, with the total upgrade costs for these thermal units estimated at ₹30,200 crore.
Assessing Infrastructure Stress in Thermal Units
While the plan offers a strategic way to manage grid volatility, it introduces material operational risks. Industry leaders, including NTPC, have expressed caution regarding the long-term impact on power plant infrastructure. The primary concern is that constant cycling places physical stress on critical equipment like boilers and turbines, which were not originally designed for such rapid operational changes. NTPC and other participants have noted that evidence regarding long-term damage remains thin. While the CEA reports that current tests at 55 per cent minimum technical load show no immediate failures, the real-world impact over several years of repeated cycling remains a key monitorable for maintenance budgets and the overall lifespan of these assets.
Reforming Merit Order Dispatch for Grid Stability
To make this transition viable, the committee has recommended a major overhaul of the Merit Order Dispatch (MOD) system, which dictates which power plants run at any given time. Currently, the system often forces a few specific plants to bear the burden of cycling, which causes uneven wear and tear across the fleet. The proposal suggests rotating these responsibilities across a wider pool of suitable generators.
For investors, the long-term financial success of this strategy will depend on the regulatory framework that follows. The government will need to clarify how it plans to compensate utilities for the added costs of flexibility, such as increased maintenance, operator training, and the efficiency losses incurred when burning coal at part-load. Investors should track future updates on compensation policies, as these will directly influence the margins and profitability of power companies involved in this shift.