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SLD · COGENERATION PLANT SLD

Cogeneration Plant Single Line Diagram Examples

These cogeneration plant single line diagram examples cover common combined heat and power (CHP) topologies, from 480 V hospital standby to 11 kV district energy and industrial waste-heat recovery. Each example shows the electrical single-line layout for a generator, switchgear, transformers, and the grid or campus connection.

4 EXAMPLES· UPDATED 2026-09-27
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COGENERATION

18 MW Biomass-Fired Extraction STG — 11 kV District Energy Cogeneration Plant SLD

COGENERATION

2.8 MW Natural Gas CHP - 480 V Hospital Cogeneration Plant SLD

ELECTRICAL ENGINEERING

5.2 MW Gas Turbine CHP — 4.16 kV University Campus Cogeneration Plant SLD

ELECTRICAL ENGINEERING

9.8 MW Refinery Waste-Heat Back-Pressure STG — 6.6 kV Industrial Cogeneration Plant SLD

ABOUT

About these examples.

Whether you're designing a new cogeneration plant, documenting an existing facility, or preparing a bid, a clear single line diagram is the fastest way to communicate protection, metering, and power flow. Use these examples as starting points, then customize equipment ratings and breaker configuration with the generator below.

HOW TO

Make one yourself.

  1. 1

    Choose your cogeneration topology

    Select the prime mover (gas turbine, steam turbine, or reciprocating engine) and set generator voltage and power rating.

  2. 2

    Place major equipment

    Add the generator, step-up and auxiliary transformers, main switchgear bus, and grid interconnection point.

  3. 3

    Configure protection and metering

    Insert circuit breakers, instrument transformers, and protective relays on each generator feeder and load circuit.

  4. 4

    Connect loads and auxiliary systems

    Show district or campus loads, auxiliary power, and any tie breakers for islanded or parallel operation.

  5. 5

    Generate and export

    Render an editable single line diagram you can download as SVG or PNG, or continue adjusting parameters.

FAQ

Frequently asked questions

What is a cogeneration plant single line diagram?01
A cogeneration plant single line diagram is a simplified electrical schematic that shows the major power equipment and connections in a combined heat and power plant—generator, transformers, switchgear, and grid tie—on a single page.
What voltage levels are typical for cogeneration plant single line diagrams?02
Common generator voltages are 480 V, 4.16 kV, 6.6 kV, and 11 kV, with step-up to distribution or transmission voltage as needed. The examples on this page span these levels.
Can I use these examples as templates for my own cogeneration plant?03
Yes. Each example is fully editable—you can change equipment ratings, add or remove breakers, and adjust the topology to match your site.
Do I need electrical engineering software to create a cogeneration plant SLD?04
No. ChatDiagram's browser-based tool handles symbols, bus bars, and connectivity automatically; you just configure the equipment and topology.
What details should a cogeneration plant single line diagram include for a permit or interconnection application?05
Typically you need generator rating, step-up transformer impedance, main breaker interrupting rating, CT/PT ratios, and the grid interconnection point with protective relays.
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