Securing 110/230kV connections, genuine dual-feed diversity, open-access and captive green power against Tamil Nadu's wind-solar base, and the records to verify per site.
Campus-scale data centres connect at high voltage, typically 110 or 230 kV for large builds, through dedicated bays at TANTRANSCO substations or new substations built for the campus. The procurement sequence, load application, system studies, bay allocation, line construction, runs on infrastructure timelines, which makes early engagement and realistic phasing essential: operators stage halls against power milestones rather than the reverse.
Site selection should therefore begin from the electrical map: distance to source substations with spare capacity, right-of-way realities for new lines, and the upstream network's redundancy, all checkable in planning records before land is committed.
Marketing language about dual feed deserves engineering scrutiny: two feeders from the same substation bus share most failure modes; genuine resilience means electrically diverse sources, separate substations or independent grid sections, with automatic transfer. On-site, N+1 or 2N power trains, generator capacity for sustained outage with fuel logistics, and UPS bridging complete the posture. The grid layer's quality determines how much the on-site layer costs.
Tamil Nadu's established data-centre zones have normalised dual-source practice, but each site's actual diversity is a drawing to verify, not a brochure line to accept.
Hyperscale tenants increasingly mandate renewable supply, and Tamil Nadu is one of the few states where that is structurally deliverable: the largest installed wind base in the country, deep solar, and an open-access regime that allows third-party and captive renewable supply to high-tension consumers. Group-captive structures, where the consumer holds equity in the generating asset, offer durable economics; hybrid wind-solar portfolios with storage are pushing contracted supply toward round-the-clock profiles.
The commercial stack, energy charges, open-access charges, banking provisions, deviation settlement, changes with regulation, so power contracting belongs in the same diligence workstream as land: modelled, verified and stress-tested before the campus pro-forma is believed.
For a candidate parcel: sanctioned-capacity and spare-bay position at the named substations; feeder and outage history for the area; the realistic cost and timeline of the connection works, lines, bays, metering; water availability for the chosen cooling design, including treated-water options; and the interaction of all of this with the land itself, easements for incoming lines, setbacks, and room for the electrical yard. The output is a graded power-readiness finding alongside title and zoning.
Parcels marketed as data-centre land frequently fail exactly here, which is why the power record, not the signboard, should price the land.
Campus-scale builds contract tens of megawatts, connecting at 110 or 230 kV through dedicated substation bays. Power availability and timeline, not land, are usually the binding constraint on delivery.
Substantially, yes: open-access and captive structures against the state's wind-solar base support large renewable shares, and hybrid-plus-storage portfolios are pushing toward round-the-clock green supply for anchor tenants.
Electrically diverse sources, separate substations or grid sections with automatic transfer, not two feeders from one bus. The actual diversity is verifiable in network drawings and should be checked per site.