Tamil Nadu's distribution utility has signed the costliest short-term power deals in its history to get through the rest of October. The Tamil Nadu Power Distribution Corporation Limited finalised purchases from 12 to 31 October that put roughly 2,000 MW into the evening peak at rates up to Rs 37 per unit, including 181 MW of gas-fired supply at that ceiling, The New Indian Express and ET Energyworld reported on 13 October.
The buys land in a month when peak demand is still running well above last year, central station maintenance has cut expected imports, and wind output is weak. TNPDCL floated emergency tenders for 4,500 MW on the Union power ministry's DEEP portal and took what the market offered.
What was bought
According to a senior TNPDCL official quoted by The New Indian Express, the utility will take 2,062 MW at Rs 31.99 to Rs 34.49 per unit from midnight to 2 am through 31 October, and another 2,001 MW at Rs 33.37 to Rs 37 from 6 pm to midnight for the evening peak. DT Next reported the evening stack as 100 MW at Rs 33.37, 1,380 MW at Rs 35.92, 340 MW at Rs 35.93 and 181 MW at Rs 37.
ET Energyworld put the round-the-clock tranche at 1,500 MW in the Rs 31.99 to Rs 34.49 band and the evening tranche near 2,000 MW up to Rs 37. Small differences across reports reflect how bids were aggregated; the shared fact is that Rs 37 is a new high for the discom on DEEP, and that no other state has closed deals at that level on the portal for the same window.
The tender, floated around 6 October, sought 1,500 MW overnight and 3,000 MW in the evening. Evening bids covered only about 2,001 MW. Thermal offers at cheaper rates did not appear in the volumes the utility needed.
Why gas cleared at Rs 37
The official told TNIE that gas plants were ready to supply when thermal power was not available cheaply. Gas contracts in the package carry a nominal fixed charge of about Rs 1 per unit if the utility declines to take the energy, which limits the downside if demand softens. Thermal plants under older agreements often bill fixed charges whether or not energy is taken. For a short October window, that optionality mattered more than the headline energy price.
Electricity Minister C. T. R. Nirmal Kumar had said earlier in the tender week that Tamil Nadu was not receiving about 3,000 MW expected from the central grid while peak demand had risen by a similar amount year on year. DT Next quoted an official saying October demand was up about 15 per cent on last year, with peak near 20,060 MW on 10 October against 17,887 MW last October.
Timing versus Andhra Pradesh
The Times of India noted that Andhra Pradesh's coordination committee finalised about 150 MW for the same period at Rs 16 to Rs 20 after bidding on 9 September. TNPDCL invited bids only about a week before the delivery window, after officials expected demand to ease after 10 October and it did not. Late bidding into a tight short-term market is how Rs 37 happens.
No other state has signed DEEP agreements at this cost for the window, ET Energyworld reported, even though several discoms floated tenders and left them unfinalised. Tamil Nadu chose firm megawatts over the political cost of load shedding.
What it means
For the state budget and tariff politics, a fortnight of Rs 32 to Rs 37 power is expensive but bounded. The flexible take-or-pay structure on the gas slice caps the bill if nights cool and demand falls. For the southern regional market, the clearing prices set a reference that other short-term buyers will see when they come late to DEEP.
For generation investors, the episode is a reminder that October is no longer a shoulder month in Tamil Nadu when El Niño and delayed monsoon keep cooling loads high. Peaking gas and storage that can bid into evening blocks have a clearer revenue story than they did when October was soft.
The structure of the evening stack shows how thin the short-term offer curve was. Most of the accepted evening volume cleared near Rs 36, with only a thin 100 MW band at Rs 33.37 and a 181 MW tip at Rs 37. That is not a deep market. It is a residual of gas peakers and traders who still had uncommitted blocks for the last two weeks of October. When Andhra Pradesh bought earlier at Rs 16 to Rs 20, it was shopping in a different month of the curve.
Household tariffs will not jump overnight by Rs 37. The purchases are short-term and partly optional on the gas slice, and the state can socialise or absorb the premium through the discom's overall power-purchase account. The political test is whether load shedding stays off the table through Deepavali-season demand. If it does, Rs 37 will be remembered as expensive insurance. If outages return anyway, the premium will look wasted.
For India's broader power market, Tamil Nadu's print is a signal to generators with flexible gas and to battery projects that can discharge from 6 pm. Exchange prices in September already showed how fast buy bids can overwhelm sell bids when coal stocks tighten and hydro is weak. A state willing to clear DEEP at Rs 37 validates peak-capacity economics that look stretched in average-cost planning models. The open question is whether the next tender comes earlier, before the residual curve steepens again.
What to watch
Three numbers will show whether the panic purchase was enough. Daily peak demand through 31 October will show if 20 GW was the top. Actual offtake versus the Rs 1 fixed-charge option will show how much of the Rs 37 gas was really burned. Any follow-on tender for early November will show whether the utility expects the squeeze to end with the month or to run into the festival season. Until then, Chennai has bought its way through October at a price no other Indian discom has matched on DEEP this window.