Substation Physical & Electrical Design (25 kV – 500 kV)

Complete design services for transmission and distribution substations, including both greenfield developments and brownfield expansions.

Substation Layout & Equipment Integration

Development of optimized station layouts, equipment arrangements, bus configurations, clearances, and constructible installation details.

Grounding & Lightning Protection Systems

Design and analysis of grounding grids, step-and-touch potential mitigation, lightning protection systems, and compliance with utility and industry standards.

Cable Systems & Underground Infrastructure

Design of cable trenches, duct banks, direct-buried cable systems, conduit routing, cable tray systems, and station underground infrastructure.

Station Service & Auxiliary Power Systems

AC and DC station service design, control building and e-house power distribution, battery systems, and auxiliary equipment integration.

Construction & Installation Engineering Support

Preparation of detailed construction drawings, equipment installation details, grounding and conduit layouts, material specifications, and engineering support during construction and commissioning.

Major Equipment Specification & Vendor Integration

Development of technical specifications and engineering requirements for power transformers, circuit breakers, disconnect switches, instrument transformers, surge arresters, reactive compensation equipment, and other high-voltage substation assets, including technical bid evaluations, vendor drawing reviews, and equipment interface coordination.

Owner's Engineer Review of Designs

Independent technical review of substation designs on behalf of project owners, ensuring engineering quality, code compliance, constructability, and alignment with project requirements.

Lightning Performance Analysis

Modelling of transmission lines in commercial software (e.g., SES-Shield3D) based on IEEE Std 998, 1410, 1243, and IEC 62305. Determines optimal shield wire placement, expected shielding failure rates, and back-flashover rates based on tower grounding resistances and ground flash density. Results guide whether to prioritize line shielding or tower grounding improvements.

Structure Grounding Study

Assessment of structure footing resistance and supplementary grounding requirements, particularly for mountainous terrain and bedrock installations. Based on IEEE Std 80 (calculations) and IEEE Std 81 (field measurements). Identifies structures with deficient grounding and prioritizes them for inspection or improvement.

Electric and Magnetic Field Study

Assessment of electric and magnetic field levels within and outside the powerline right-of-way, ensuring compliance with IEEE C95.6 for public exposure limits. Includes comprehensive literature review suitable for public consultation requirements.

Vertical Clearances for Electrostatic Induction

Analysis of electrostatic induction at road crossings and parking lots in accordance with CSA C22.3 No. 1. Ensures body current is limited to 5 mA (or more stringent client-specified limits), determining minimum required vertical clearances.

Radio Interference and Audible Noise

Study of radio interference and audible noise generated by transmission lines, ensuring compliance with Industry Canada limits and applicable municipal noise regulations. Results inform minimum conductor sizing requirements to meet industry standards.

Corona Effect and Power Losses

Quantification of expected corona losses and resistive losses to feed into conductor selection and optimization. Results inform economic trade-offs between conductor size, losses, and capital cost over the project lifecycle.

Transposition and Phasing Arrangement

Determination of the number, location, and configuration of transpositions required to meet voltage unbalance requirements at terminal stations. Optimal phasing is assessed to minimize interference with railways, reduce electric field intensity, and lower required vertical clearances for large vehicles.

Insulation Coordination

Determination of switching surge levels using Electromagnetic Transient Programs (e.g., EMTP-RV), including frequency-dependent line models and station equipment. Study covers surge arresters, circuit breakers, transformers, shunt reactors, and capacitive voltage dividers. Identifies appropriate dead-time for single-pole reclosing and external mitigation measures where required. Results define required structure clearances and insulator string lengths.

Overview

• AC interference occurs when transmission or distribution facilities are located near metallic infrastructure such as railways, communication systems, or other metallic assets.
• Electromagnetic coupling under normal or fault conditions may result in hazardous induced voltages and currents, creating safety concerns for personnel and affecting nearby infrastructure.
• Utilities, railway operators, and governing standards often require AC Interference Studies to assess potential impacts and determine appropriate mitigation measures.

Standards & Software

• Steady-state and fault conditions are studied per national and international standards: IEEE Std 2746, IEEE Std 80, and CSA C22.3 No. 6.
• Studies are performed using the SES-CDEGS software suite.
• Accurate electrical models are developed to assess both safety factors and system integrity aspects.

Railway Systems

• Evaluation of step and touch potential hazards for personnel safety.
• Assessment of interference with signalling systems and impacts on insulated rail joints.
• Determination of required mitigations for safe and reliable railway operation.

Owner's Engineer Review of Studies

Independent technical review of AC interference studies on behalf of project owners, verifying methodology, modelling accuracy, standard compliance, and adequacy of proposed mitigation measures.