Renewables
Utility-scale solar PV, onshore wind and RE-hybrid plants — complete electrical engineering from collector system design through grid compliance and energisation.
Engineering the energy transition at utility scale
DD Powertech delivers power system studies and detailed electrical engineering for solar PV plants, onshore wind farms and RE-hybrid projects that combine solar, wind and battery storage.
Our team covers the full electrical scope — collector system design, pooling substation engineering, earthing, protection, grid-code compliance studies and commissioning support — keeping the entire design under one accountable team.
What this sector involves
A utility-scale renewable plant goes through a chain of electrical decisions before a single panel or turbine is energised. The collector network must carry the generation profile efficiently, the pooling substation must meet the utility's specification, and the plant must prove it can support the grid during disturbances.
On the compliance side, CEA connectivity standards and central and state transmission utility requirements specify voltage ride-through, reactive power, frequency response, power quality and protection performance — and each needs accepted studies before energisation is approved.
DD Powertech works across this chain — from connection feasibility and key SLDs to detailed drawings, ETAP and PSCAD studies and relay setting sheets for commissioning.
Typical scope for renewables
- Utility-scale solar PV
- Onshore wind farms
- RE-hybrid & co-located BESS
- Pooling substations 33–400 kV
- CTU & STU grid compliance
- LVRT, HVRT & FRT verification
- Collector system design
- SCADA & plant controller integration
What DD Powertech delivers for renewables
Collector system design
MV and HV collector networks for solar, wind and hybrid sites — cable sizing, routing, feeder topology, losses and protection, sized for the real generation profile rather than a peak-only assumption.
Pooling substation engineering
Pooling substations at 33, 66, 132, 220 and 400 kV — SLDs, layouts, protection, earthing, cable engineering and civil interfaces from concept to IFC.
Grid compliance studies
Load flow, short circuit, reactive capability, ride-through, harmonics and power quality to CEA and CTU/STU requirements — structured for connection approval.
Earthing & lightning protection
Earthing for large-area plants and pooling substations, plus IEC 62305 lightning protection for arrays, inverter stations and control buildings.
Studies that unlock grid connection
PSCAD & EMT studies
Inverter-level EMT models in PSCAD for LVRT, HVRT, frequency response and control interaction — often the critical-path item for connection approval.
Protection & relay coordination
Coordination from the grid interface down to the inverter transformers, including transformer differential and feeder protection, with commissioning-ready setting sheets.
BESS integration
Studies and electrical design for battery storage co-located with solar or wind, operating as one generating unit at the point of connection.
Reactive power & voltage
Reactive capability assessment, compensation sizing and voltage-profile optimisation where the network operator specifies tight power factor and voltage bands.
Support at every project stage
Development
Grid feasibility, connection application studies, key SLD and plant layout to support land and connectivity decisions.
Pre-construction
Basic and detailed engineering, specifications, vendor reviews and the full grid compliance study set.
Construction
IFC drawings, site query support, relay settings and protection coordination ahead of energisation.
Operation
Post-commissioning model validation, protection audits, performance and power quality investigations.
Built for utility acceptance
Studies and designs to CEA connectivity and grid standards, IEC and IEEE, modelled in the tools utilities and OEMs use.
Renewables — what clients ask us
Which studies are needed to connect a solar or wind plant in India?
Typically load flow, short circuit, reactive power capability, LVRT/HVRT, frequency response and harmonic studies to CEA connectivity standards and the CTU or STU requirements. Larger plants increasingly also need validated PSCAD models.
Can you design both the collector system and the pooling substation?
Yes. Designing them together means cable sizes, transformer ratings, reactive compensation and protection are consistent from the inverter to the grid.
Do you support hybrid and storage-backed plants?
Yes. We study and design solar-wind hybrids and plants with co-located BESS, including the combined plant's reactive capability and protection.
Do you work with inverter OEM models?
Yes. We integrate OEM-supplied inverter and plant-controller models into PSCAD, PSS/E and PowerFactory, and validate them against grid-code test cases.
Working in renewables?
Tell us your project stage and capacity — we'll outline how DD Powertech can support it.
4 499/5, Vinobha Nagar,
Koduvai, Tamil Nadu 638660, India
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