Urban Rail Transit UPS Power Solution | Metro Supporting System Project

Project Background

Urban rail transit systems are among the most demanding operating environments for power infrastructure. Metro lines run continuously across extended service hours, carrying hundreds of thousands of passengers daily through a network of stations, tunnels, control centers, and equipment rooms that must all function in precise coordination. Power supply reliability is not a performance metric in this context — it is a safety requirement. Any interruption to station systems, signaling equipment, communications networks, or emergency lighting carries direct consequences for passenger safety and operational continuity.

Metro Line 1 and Line 2 represent core urban transit corridors serving high daily ridership volumes across a dense network of stations. As the lines were constructed and commissioned, ensuring robust, uninterruptible power supply for station-level and system-level infrastructure became one of the most critical engineering priorities of the entire project.

Project Challenges

Rail transit power infrastructure operates under requirements that set it apart from virtually every other commercial application.

Station environments house a wide range of critical systems — ticketing and fare collection equipment, passenger information displays, CCTV surveillance networks, communications and broadcasting systems, access control, and emergency lighting — all of which must remain operational regardless of grid conditions. Simultaneous power protection across dozens of stations, each with its own load profile and equipment configuration, demands a supply solution that is both technically consistent and highly scalable.

Equipment rooms within metro stations present their own environmental challenges. High heat loads generated by servers, network equipment, and power electronics require continuous precision cooling to maintain stable operating temperatures. Temperature and humidity excursions in these spaces can degrade sensitive equipment, trigger failures, and shorten hardware lifespan — all unacceptable outcomes in an infrastructure context where maintenance access is constrained and unplanned downtime is operationally disruptive.

Finally, the scale and coordination demands of a multi-line metro project require a supplier capable of delivering large equipment volumes on schedule, with consistent quality across every unit and reliable technical support throughout installation and commissioning.

Solution Overview

SHANPU independently developed and delivered a comprehensive power protection and environmental management solution covering both Metro Line 1 and Line 2, supplying and commissioning equipment across the full scope of the project.

The core of the deployment comprised 130 sets of UPS and power distribution cabinet systems, providing uninterruptible power protection for station equipment rooms, control systems, and critical operational infrastructure across all stations on both lines. Each unit was engineered to deliver stable, clean output power under variable load conditions, with the redundancy and switchover performance required to meet urban rail transit safety standards. The power distribution cabinets were configured to support the specific circuit requirements of each station's equipment layout, enabling precise load management and fault isolation across the entire network.

Twelve sets of computer room precision air conditioners were deployed to maintain constant temperature and humidity conditions in station equipment rooms. These units provide continuous climate control calibrated to the operating requirements of communications and IT equipment, ensuring that thermal conditions remain stable across seasonal temperature variations and fluctuating internal heat loads. Precision cooling at this level protects hardware reliability, reduces failure rates, and extends the operational lifespan of the equipment it serves.

Two sets of power environment intelligent monitoring systems were installed to provide centralized, real-time visibility across the power and environmental infrastructure of both lines. These systems aggregate data from UPS units, power distribution cabinets, and precision air conditioners into a unified monitoring platform, enabling operations teams to track system status, battery health, temperature, humidity, and power quality across all stations from a single interface. Intelligent early warning functions detect developing anomalies and generate alerts before conditions escalate into failures, supporting a proactive maintenance approach that minimizes unplanned outages across the distributed metro network.

Project Outcomes

All 130 UPS and power distribution cabinet systems, 12 precision air conditioners, and 2 intelligent monitoring systems were delivered, installed, and commissioned across Metro Line 1 and Line 2, meeting the project schedule and technical acceptance requirements of the transit authority.

Since entering service, the equipment has maintained stable, reliable performance across the full operational demands of both lines. Station power systems have consistently met the uninterruptible supply requirements that urban rail transit safety standards mandate, while precision cooling infrastructure has sustained controlled equipment room environments throughout varying seasonal conditions. The centralized intelligent monitoring platform has given operations teams continuous system-wide visibility, enabling efficient maintenance management across a geographically distributed network of stations.

The Metro Line 1 and Line 2 deployment demonstrates SHANPU's capability to independently develop, supply, and commission large-scale power infrastructure for mission-critical urban transit applications — delivering the technical consistency, supply reliability, and project execution capability that complex rail infrastructure projects demand.