Energy & Power

Scope: OSL successfully delivered comprehensive power supply solutions for the Glasgow Metro system, covering initial feasibility surveys, equipment design and installation, and high-specification testing and commissioning. The project scope included designing and implementing a power distribution system from an 11kV high-voltage substation to the new Metro Operational Control Centre (OCC) and Signalling Equipment Rooms (SERs) across the 14km tunnel network, achieving ultra-high system reliability targets.

Key Deliverables:

Initial Feasibility and Survey Work:

• 360-degree tunnel surveys using Spheron VR to confirm design feasibility.

• Full condition analysis, with redlined drawings and reports on tunnel infrastructure, lighting, water ingress, and cable management.

Comprehensive Power System Design and Distribution:

• Design and installation of an 11kV SPEN substation, complete with a suite of transformers and high-voltage/low-voltage (HV/LV) distribution equipment.

• Power distribution network extending from the traction substation through the OCC to a 1,000V ring around the metro, supporting individual SERs at each metro station.

• Full distribution system analysis and design using ETAP .

System Reliability and Redundancy:

• Designed for 99.995% uptime at the OCC and 99.9999% at each station, ensuring minimal downtime for uninterrupted metro operation.

• Dual power supply paths with a new 700kVA backup generator for consistent and reliable service.

Advanced Protection and Control Systems:

• Baldwin and Francis auto-reclose distance protection system for reliable power distribution, utilising MICOM relays and ring main units (RMUs) across all locations.

• Fibre-optic network rings for data communication between all MICOM units, supporting robust and decentralised control.

Testing, Commissioning, and Compliance:

• Full system testing, including protection setting and compliance testing, both pre- and post-energisation.

• Comprehensive live tests encompassing continuity, insulation, fault current, voltage, and earth loop impedance checks.

High-Specification Cabling and Electrical Distribution:

• Installation of HV supply cable from traction substation to OCC and stepped voltage transformations to maintain optimal voltage across the 14km distribution system.

• Phased transition of SPEN 6.6kV system with new 11kV substation to avoid system outages.

Seamless Transition and Integration:

• Installation of the new system parallel to existing infrastructure to ensure uninterrupted metro operations.

• Full commissioning of HV & LV network, meeting all regulatory standards.

Scope: OSL played a pivotal role in the Gatwick Station Project (GSP), focusing on the electrification and power supply enhancements necessary for optimising platform and track layouts. This project aimed to improve train throughput at Gatwick Airport, a critical network pinch point. By integrating power supply solutions with signalling and track works, OSL successfully coordinated the design and implementation processes to ensure efficient use of existing access while minimising disruption on the Brighton Mainline.

Key Deliverables:

Electrification and Power Supply Design:

• Comprehensive design and installation of electrification systems to support enhanced signalling operations across Gatwick Station

• Development of a robust power distribution framework to ensure reliable electrification of trackside systems, contributing to improved operational efficiency

• Designing to future-proof electrification and capacity

Integrated Power and Signalling Infrastructure:

• Pre-staging of power supply installations to maintain uninterrupted operations during peak periods, effectively managing risk and minimising costs

• Identification and implementation of minor electrification adjustments (e.g., power disconnections, recovery of track circuit equipment) to facilitate the work of other contractors and ensure clear work sites

• Early-stage installations, such as rationalising cabling for power systems and the integration of tri-state banner repeater signals, minimising risks associated with the main commissioning stage

• Strategic electrification upgrades to the signalling power supply, enhancing reliability and ensuring seamless integration with the overall station infrastructure

Efficient Testing and Commissioning Approach:

• Development of Testing and Commissioning (T&C) plans tailored to incorporate additional minor power supply elements without impacting overall project timelines.

• Utilisation of Rules of the Route access for rapid adaptation to electrification requirements

Scope: This project encompasses comprehensive maintenance and enhancement of rail track power and signalling infrastructure to ensure energy efficiency and reliable performance. The scope covers the inspection, testing, and repair of power-dependent track points, switches, and signalling components across designated locations. By prioritising advanced diagnostic tools and sustainable energy practices, this project aims to optimise track performance, reduce energy losses, and support reliable rail operations.

Key Deliverables:

Power Supply Maintenance and Enhancement:

• Inspection and maintenance of power systems associated with track points, switches, and signal infrastructure

• Repair or replacement of energy-critical components to ensure optimal power flow and prevent disruptions

Testing and Diagnostic Processes:

• Use of diagnostic equipment (e.g., Mega testers, cable testing leads) to assess power continuity and identify any faults within track circuits

• Comprehensive testing of electrical connections and earth continuity for improved energy efficiency and safety compliance

Energy Efficiency and Sustainability Initiatives:

• Identification and implementation of energy-saving measures, such as efficient material usage and optimised equipment settings

• Recycling or responsible disposal of materials to reduce environmental impact in alignment with sustainability goals

Documentation and Compliance Tracking:

• Detailed record-keeping of all maintenance activities, including testing results and component replacements, to ensure compliance with energy and safety standards

• Compilation of reports on energy usage and power system performance, supporting data-driven improvements in track infrastructure