33/220 kV Pooling Substation
- Client
- Anandshree Renewables
- Scope
- Complete detailed engineering consultancy
Infrastructure sector
Solar, Wind & Hybrid Power Plant Engineering
Plant electrical balance of system, collection networks, layout interfaces and grid connection for utility-scale solar, wind and hybrid projects. Pooling substations and battery storage have their own pages.
Who does what on a renewable project
We usually work for the EPC contractor. Owner and site names are not published on this website.
| Party | Typical role on a renewable project |
|---|---|
| Plant owner or developer | Owns the plant, obtains connection approval and sets the project requirements |
| EPC contractor | Designs, procures and builds the plant, pooling substation and evacuation works under contract |
| Utility or transmission licensee | Owns the receiving substation and grid; sets metering, protection and SCADA requirements |
| Equipment OEMs | Design their own modules, inverters, turbines and battery systems and supply their data |
| CoreGrid Engineering | Prepares the engineering the client contracts for: electrical and civil design, studies by scope and document review |
Solar PV power projects
A solar plant is a set of PV blocks, each with inverters and an inverter-duty transformer, connected by collector feeders to the plant or pooling substation. Its electrical design decides losses, protection and how the plant meets the grid’s connection requirements. Within a contracted scope we prepare the plant’s electrical balance of system and coordinate the layout with civil design. PV detailed design is a different piece of work from the design of the pooling substation, which has its own page.
Electrical drawings
- PV plant SLD; DC / AC and auxiliary SLDs as applicable
- Module, string and array layout
- Inverter and transformer station layout
- DC / AC cable routing and plant MV collection layout
- Earthing and DSLP drawings
Design / sizing calculations
- String voltage / current configuration
- Inverter and transformer sizing
- DC / AC cable sizing, voltage drop and losses
- Earthing and DSLP sizing
Grid / power system studies
- Load flow and fault level
- Voltage and reactive power
- Harmonics
- Grid interconnection, as contracted
Civil & structural
- Inverter and transformer station foundations
- Cable trenches, roads and drainage
- Equipment supports
- Module mounting structures and foundations, only where genuinely contracted
PV resource and energy-yield studies are included only if actually provided for the contract.
Electrical discipline: full lists Civil & structural: full lists Studies
Wind power projects
A wind farm connects each turbine generator (WTG) through its unit transformer to medium-voltage collector circuits, commonly at 33 kV, which run to the pooling substation. Turbine spacing and terrain make the collection network long, so conductor or cable sizing, losses and protection grouping matter. Turbine design is the OEM’s responsibility, and no certified wind-resource assessment is assumed.
Electrical drawings
- Wind farm SLD
- WTG transformer and MV collector / feeder SLD
- Collector cable or overhead routing layout
- Pooling / evacuation interfaces, protection, metering and SCADA interface drawings
Design / sizing calculations
- MV collector conductor / cable sizing
- Voltage drop and loss evaluation
- Equipment and transformer calculations
- Earthing calculations
Grid / power system studies
- Load flow and short-circuit
- Reactive power and voltage
- Harmonics and protection
- Interconnection, as contracted
Civil & structural
- Transformer and collector structures
- Crane, access and site roads
- Trenches and drainage
- WTG foundation review or design, only if specifically contracted
Turbine OEM or mechanical design is not part of CoreGrid’s scope.
Electrical discipline: full lists Civil & structural: full lists Studies
Hybrid solar–wind and shared evacuation
Hybrid plants combine solar and wind, sometimes with storage, behind one connection point. The engineering challenge is the shared infrastructure: combined collector networks, a shared pooling substation and grid connection, common capacity and protection interfaces, and metering and reactive-power arrangements that meet the connection requirement.
- Combined collector and pooling bay scheme
- Shared evacuation transformer and bay sizing
- Protection and control coordination between sources
- Optional BESS integration at the collector bus
How plants connect to the grid
Generation and storage connect through collector feeders to a pooling substation, which steps the voltage up to 132 kV, 220 kV or higher. An evacuation line then carries the power to the utility’s receiving substation, where metering, protection and SCADA requirements apply.
System studies such as load flow, short circuit, reactive power capability and harmonic analysis support the connection where the project commissions them. Each is offered on a stated basis; see power system and protection studies.
Scope basis
How each renewable activity is offered. We confirm the exact scope in writing for every project.
| Activity | Basis |
|---|---|
| Plant electrical balance of system, collection networks, SLDs, earthing | Offered as detailed engineering |
| Pooling and evacuation substation electrical and civil design | Offered as detailed engineering |
| Plant layout and equipment selection interfaces with suppliers | Offered, coordinated with OEM data |
| Load flow and grid integration studies | By scope, as contracted |
| PV resource and energy-yield study | Only if actually provided for the contract |
| Performance testing and commissioning support | As contracted; see site support |
| Module, inverter, turbine and battery equipment design | OEM responsibility |
Representative renewable assignments
220/33 kV Wind Pooling Substation
- Client
- Hartek Power Pvt. Ltd.
- Scope
- Complete civil engineering consultancy
Related
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