Company profile
A multidisciplinary engineering consultancy for power transmission, substation, renewable-energy and storage infrastructure, working with EPC contractors and other project stakeholders from tender to final submission.
Section 01
CoreGrid Engineering is a multidisciplinary engineering consultancy supporting the design and development of power transmission, substation and renewable-energy infrastructure. Our services span AIS and GIS substations, renewable pooling and evacuation systems, battery energy storage integration, transmission lines and HVDC stations, with the electrical, civil and structural engineering each of them needs.
We work with EPC contractors and other project stakeholders from tender-stage technical assessment to post-award detailed design, preparing coordinated drawings, engineering calculations, schedules and technical documents to the applicable project specifications. Detailed design engineering is our primary service; pre-bid engineering is the next.
Section 02
A power project involves several parties. The owner or developer sets the requirements and holds the asset. The utility sets the connection, metering and protection rules. Equipment manufacturers design and supply their own equipment. The EPC contractor designs, procures and builds the works under contract. Our role sits inside that structure: we prepare the engineering the contracting party needs, usually the EPC contractor, and submit it for review by the client or its consultant.
That role decides how we describe our work. We prepare, check, submit and revise; approval belongs to the party the contract names. We do not construct, supply or operate, and we do not certify on another party’s behalf.
| Party | Typical role |
|---|---|
| Owner or developer | Requirements, approvals, asset ownership |
| Utility | Connection, metering and protection rules |
| EPC contractor | Design, procurement and construction under contract |
| Equipment OEM | Equipment design, data and supply |
| CoreGrid Engineering | Engineering design, studies and review, as contracted |
Section 03
Electrical and civil/structural are our disciplines. Substations, renewable plants, pooling stations, storage, lines and HVDC stations are the infrastructure we apply them to.
| Infrastructure | Electrical | Civil & structural |
|---|---|---|
| Substations & switchyards | ✓ | ✓ |
| Solar, wind & hybrid plants | ✓ | As contracted |
| Pooling substations | ✓ | ✓ |
| Battery energy storage | ✓ | ✓ |
| Transmission lines | Line electrical | Towers & foundations |
| HVDC stations | As contracted | As contracted |
Section 04
System and bay design, AIS and GIS layouts and clearances, conductor and busbar sizing with short-circuit forces and sag-tension, earthing and lightning protection, equipment sizing and selection, station auxiliary AC and DC systems, cables and illumination, with protection, control and SCADA interfaces where in scope. Power-system studies are offered by scope and stated in each proposal.
Section 05
Site grading and plot plans, steel gantries and equipment supports, transformer and reactor foundations with oil containment, control and GIS buildings, cable trenches and duct banks, drainage, roads and fencing. Designs follow the geotechnical data, the equipment loads and the structural criteria the client specifies, with reinforcement drawings, bar bending schedules and quantities.
Section 06
AC transmission lines up to 765 kV: conductor and earth wire selection, losses and corona checks, route and tower spotting where in scope, single and double circuit tower design with load trees, member and connection design, sag-tension and stringing charts, and tower foundations by soil class. Tower types follow each project’s own tower schedule.
Section 07
Utility-scale solar, wind and hybrid plants reach the grid through collector networks, pooling substations and evacuation lines. We engineer those links: plant electrical balance of system, collector systems, pooling substation electrical and civil design, and battery storage sizing, balance of plant and grid integration, coordinated with equipment manufacturers and the utility’s requirements.
Section 08
For HVDC schemes we offer converter-station engineering, equipment specification and review, and study support, with the boundary to the converter manufacturer agreed for each project. Alongside our design work we offer engineering studies, equipment and offer reviews, quality inspections and test witnessing, and site, commissioning and O&M technical support, each as contracted.
Section 09
Every package converts project data into design in the same order. We log the inputs (specification, SLD, MDL, bay list, equipment data, site and soil information), fix the design criteria and record assumptions, prepare calculations, develop drawings from the results, and check the interfaces between disciplines before anything is issued.
The interfaces matter most, because one discipline’s output is another’s input. The table shows typical examples. We pass these items between disciplines as controlled data rather than informally, so a change in one place is traced through the drawings it affects.
| When this is fixed | It drives |
|---|---|
| Transformer arrangement | General arrangement, foundation and oil-pit design, fire separation |
| Bus short-circuit forces and sag-tension | Gantry and support loads, then foundation design |
| Grounding study results | Earth mat layout, conductor sizes and equipment bonding |
| Equipment vendor drawings | Support spacing, anchor bolts and cable routes |
| Solar or wind pooling layout | Transformer bays, collector circuits, control room and evacuation design |
Section 10
Calculations and drawings are checked by someone other than their author before they leave CoreGrid. Each calculation shows its inputs, method, assumptions and acceptance limit, so the client’s reviewer can follow it. Documents carry the client’s numbering and revision convention, are sent under transmittal and are recorded in a drawing register.
Review comments are logged in a comment resolution sheet, answered one by one and closed in a revised submission. Designs follow the codes and specifications each project names, commonly IS/BIS standards, IEC standards, CEA regulations, CBIP recommendations and utility or owner specifications; where a project requirement differs from a general code, the approved requirement governs and the difference is raised as a technical query.
Section 11
Drawings in a package should agree with each other on dimensions, levels and equipment positions. We cross-check electrical layouts against civil, structural and vendor information before issue, so reviewers meet fewer contradictions between sheets.
Each calculation states its input documents, design criteria, formulae and assumptions, and records the result against the acceptance limit. A reviewer can follow the path from specification to result without reconstructing it.
Review comments are logged in a comment resolution sheet with a response and the revision in which each was closed. The review history stays clear and discussions stay short.
Reading specifications and MDLs closely, we flag missing inputs, unclear boundaries between packages and interface items that no party has yet claimed. Raising these early costs less than finding them on site.
Layouts are reviewed for access, maintenance space, erection sequence and cable routing, not only for minimum clearances, so site teams can build and operate the design.
Document numbering, revision control, transmittals and a drawing register are maintained throughout, in the client’s convention where one is specified.
These describe how we work and what we aim for. They are not numerical performance claims.
Section 12
To be a dependable engineering partner for the power and energy infrastructure India is building: substations, transmission, renewable generation and energy storage.
To deliver fit-for-purpose engineering that matches each client’s specification, budget and schedule, with traceable calculations, coordinated drawings and controlled revisions, and to build long-term working relationships through consistent technical quality.
We intend to keep developing our work in HVDC, large-scale renewables and energy storage as these sectors grow, alongside our substation and transmission engineering.
Section 13
A discipline package for a substation, pooling station, BESS or line, taken to final issue.
Earthing, bus calculations, a foundation design, NGR sizing or a tower check, against your design basis.
Pre-bid engineering, offer and GTP review, or site and commissioning support.
Request Engineering Proposal coregrid@coregrid.co.in +91-9471804100