HV Substation Design & Engineering Services Australia
Primary, Secondary, and SCADA Design for Substations 11 kV to 500 kV
The reliability, safety, and compliance of every substation is determined at the design stage. Megavar’s multi-disciplinary design team delivers primary electrical design, protection and control (secondary) design, SCADA and automation design, power system modelling, and independent design auditing for substations from 11 kV distribution through to 500 kV EHV transmission. We support asset owners, EPCs, and developers from concept through to detailed design, specification, and commissioning support.
Primary Electrical Design
Our primary design engineers develop the physical and electrical arrangement of substation equipment. Deliverables include single line diagrams (SLDs), general arrangement drawings, equipment layouts, busbar configurations (single bus, double bus, breaker-and-a-half, ring bus), cable route and sizing calculations, HV and LV cable schedules, equipment specifications and datasheets, earthing design (with earth potential rise and step/touch analysis), and lightning protection design. All designs comply with AS/NZS 62271, AS/NZS 3000, ENA guidelines, and NSP-specific standards.
Protection and Control (Secondary) Design
Protection design is our core strength. We develop complete protection and control schemes for new substations and augmentation projects, including protection philosophy and functional specifications, protection settings calculations and coordination studies, relay configuration and parameterisation (ABB, Siemens, SEL, GE, Schneider Electric), AC and DC schematic drawings, panel wiring diagrams and terminal schedules, and IEC 61850 system configuration (SCL/SCD files, GOOSE mapping, MMS data models). Our protection engineers have deep experience across all standard schemes: overcurrent, differential (transformer, busbar, line), distance, auto-reclose, breaker failure, synchrocheck, and special protection schemes.
SCADA and Automation Design
We design complete substation automation systems, including SCADA architecture and RTU/gateway specification, IEC 61850 station bus and process bus design, DNP3 and Modbus point lists and protocol mapping, alarm management philosophy, and HMI screen design. Our designs ensure seamless integration with existing NSP and AEMO control systems.
Power System Modelling
Using ETAP, DIgSILENT PowerFactory, SKM, and CAPE, we perform load flow, short circuit, protection coordination, harmonic, arc flash, and earthing studies to support design decisions and regulatory compliance. See our dedicated Power System Studies page for details.
Independent Design Auditing
Megavar provides independent peer review and auditing of third-party substation designs, including design compliance checking against specifications and standards, protection settings verification, constructability review, and risk assessment. This service is particularly valuable for asset owners who engage design-and-construct contractors and require independent quality assurance.
Frequently Asked Questions
High Voltage (HV) Substation Design & Engineering Services
What substation design services does Megavar provide?
Megavar provides primary electrical design, protection and control (secondary) design, SCADA and automation design, power system modelling, and independent design auditing for substations from 11 kV to 500 kV.
Does Megavar design protection schemes for all relay manufacturers?
Yes. Our protection engineers have configuration and parameterisation experience across ABB, Siemens, SEL, GE Multilin, and Schneider Electric (MiCOM) relay platforms, as well as legacy electromechanical relays.
Can Megavar provide IEC 61850 design?
Yes. We design IEC 61850 substation automation systems including SCL/SCD file development, GOOSE message mapping, MMS data modelling, and station bus/process bus architecture.
Does Megavar provide design auditing for third-party designs?
What design software does Megavar use?
ETAP, DIgSILENT PowerFactory, SKM Power Tools, CAPE, AutoCAD, and manufacturer-specific relay configuration tools (PCM600, DIGSI, AcSELerator, EnerVista, MiCOM S1 Studio).
Ready to commission your substation? Contact Megavar today on 1300 730 499 or visit our contact page to request a quote.
Why Choose Megavar For Our High Voltage (HV) Substation Design & Engineering Services?
- Expertise: Extensive experience in HV substation design, engineering, and substation commissioning across diverse industries.
- Reliability: Quality-driven processes that deliver dependable solutions every time.
- Innovation: The latest technologies and methodologies to meet the highest standards.
- Safety Commitment: Prioritising safety to protect both our team and your assets.
Let Megavar handle your HV substation design, substation maintenance, and engineering needs, and experience the difference our dedication and skill can make. Contact us today to discuss how we can help achieve your project goals.
Explore Our other services
HV cable testing: VLF withstand, partial discharge, DC insulation, sheath integrity, and fault location for XLPE and PILC cables 11kV to 220kV across Australia.
HV testing and commissioning by Megavar's own engineers. Substations, transformers, cables, switchgear. 200+ instrument fleet, four offices nationwide.
SCADA engineering and integration for substations and renewable energy projects. RTU configuration, IEC 61850, DNP3, cybersecurity, and end-to-end commissioning across Australia.
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We’re incredibly excited to share a big milestone in Megavar’s story—we’ve officially opened our new Newcastle branch, located at 22 Gavey Street, Mayfield,
