HV and EHV Substations Design
MEPCO’s substation engineering design team delivers detailed, multidisciplinary designs for Air-Insulated Substations (AIS) and Gas-Insulated Substations (GIS) up to 500 kV. We develop key single-line diagrams, equipment layouts, section elevations, control and protection schematics, earthing mats, and multidisciplinary interfaces with civil, structural, and SCADA disciplines.
Figure 1: 500/220 kV extra-high-voltage substation switchyard engineering and layout design.
Technical Scope & Engineering Capabilities
MEPCO Engineering Projects brings specialized domain knowledge, rigorous modeling standards, and practical site experience to every assignment. Our scope covers:
- Key Single-Line Diagrams (SLD): Formulating substation busbar topologies (single bus, double bus with transfer, breaker-and-a-half, ring bus) detailing all primary switching apparatus, instrument transformers, and surge arresters.
- Substation Plot Plans & Layouts: Optimizing equipment spacing, phase-to-phase and phase-to-earth electrical clearances, maintenance access roadways, and security perimeter fencing.
- Section Elevations & Structural Interface: Developing elevation sections, gantry steel structure loading criteria, equipment support structures, and foundation loading datasheets.
- Secondary Protection & Control Schematics: Complete AC/DC schematics, current and voltage transformer circuits, trip circuit supervision, breaker failure logic, and interlocking schemes.
- Cable Trench & Raceway Engineering: Designing indoor and outdoor cable trenches, duct banks, cable tray runs, and control room raised floor layouts.
- Substation Auxiliary Power Design: Sizing and designing AC station service transformers, low-voltage distribution boards, DC battery banks, and dual-redundant battery chargers.
Software Platforms & Computational Tools
Design Tools: AutoCAD, Autodesk Revit (BIM for substations), Bentley Substation.
Applicable Standards & Grid Codes
Substation Standards: IEC 61936-1 (Power installations exceeding 1 kV AC), IEEE 1427 (Guide for Substation Design), IEC 62271-203 (GIS), National Grid Codes.
Methodology & Project Delivery Workflow
Our engineering delivery aligns with MEPCO’s structured 6-stage project execution framework, ensuring quality throughout input verification, design modeling, and client handover:
- Stage 01 — Scope & Criteria Definition: Establish study boundaries, utility tie-in data, single-line diagrams, and client objectives.
- Stage 02 — Data Audit & Modeling Assumptions: Collect, verify, and validate manufacturer datasheets, impedance tolerances, and site operating configurations.
- Stage 03 — Simulation Model Development: Build detailed, validated mathematical digital models in specialized power software.
- Stage 04 — Computational Analysis & Verification: Execute base-case and contingency scenarios, conducting rigorous internal peer reviews.
- Stage 05 — Client Review & Approval: Present study findings, address technical comments, and participate in technical clarification sessions.
- Stage 06 — Final Handover: Deliver formal certified engineering reports, executive summaries, and native simulation model files.
Figure 2: Coordinated indoor switchgear room layout, cable trenching, and control cabinet arrangement.
Completed Project References (From MEPCO Profile)
Selected project assignments delivered by MEPCO demonstrating our technical execution and regional client trust:
| Project Name | Client / Authority | Location | Tools / Mode | Scope Executed |
|---|---|---|---|---|
| HV & EHV Substation Design Portfolio | Utility Authorities & EPC Contractors | Egypt, KSA, UAE | AutoCAD / BIM | Complete multidisciplinary design for AIS and GIS substations up to 500 kV, single-line diagrams, layouts, and protection schematics. |
Key Engineering Deliverables & Outputs:
- Comprehensive Key Single-Line Diagrams and Three-Line Operational Schematics.
- Substation Layout Plot Plans, Section Views, and Clearance Verification Drawings.
- Secondary Protection, Control, and Metering Schematic Diagrams and Interconnection Wiring Schedules.
- Cable Trench and Conduit Routing Layouts with Cross-Section Details.
- Bills of Quantities (BOQ) and Detailed Technical Equipment Specifications.
Inquire About This Service
Contact MEPCO’s engineering team for technical proposals, study scope definition, or project consultations:
Email: m.khaled@mepco-tds.com | Phone: +20 11 2696 7082 | HQ: 5 Al-Ibrahimia Street, Cairo, Egypt