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Tailored electrical solutions for different sectors

Intelligent DC Traction Power Supply System Solution for Mining Transportation

An intelligent DC traction power supply system solution for surface mining transportation, providing core support for efficient, safe, and low‑carbon mine operations. Stable power supply is the lifeblood of continuous mining production. This solution offers a complete product portfolio—from AC 10 kV input to DC 1650 V output—covering medium‑voltage AC switchgear, rectifier units, DC switchgear, and substation PSCADA systems, thereby ensuring end‑to‑end coverage of power conversion, load distribution, and fault protection. Key components such as DC circuit breakers, DC disconnect switches, and microprocessor‑based DC protective relays are all independently developed, supporting multi‑unit parallel redundancy and delivering millisecond‑level fault location and automatic transfer capabilities. Even if a single device malfunctions, power supply remains uninterrupted, fully aligning with international best practices for mine power‑supply safety. Intelligence is at the heart of this solution. Leveraging Wanlong’s self‑developed DC traction electrical monitoring and management platform, the system integrates high‑precision sensors and edge‑computing modules to collect parameters—including catenary tension, insulation condition, and load fluctuations—at millisecond resolution. Using AI algorithms, it predicts equipment degradation trends and issues fault warnings up to 72 hours in advance, shifting from “post‑event emergency repair” to “proactive prevention.” Meanwhile, the system is deeply integrated with the autonomous haulage dispatch platform, dynamically adjusting output voltage based on truck location and payload, enabling coordinated optimization among vehicles, the grid, and the power source and significantly reducing overall energy consumption. The platform also supports unattended operation and management of substations, greatly enhancing system reliability and sophistication while meeting the stringent requirements of the “integration of informatization and industrialization” in mining.

WDQXB Series Intelligent Box-Type DC Traction Substation

The WDQXB Series Intelligent Box-Type DC Traction Substation, independently developed by Wanlong Electric, is an integrated electrical facility designed to meet the DC traction power supply requirements of rail transit systems such as subways, light rail, and trams. Featuring an European-style landscape design, it incorporates a double-layer metal enclosure with thermal insulation and flame-retardant construction. Internally, it integrates a complete range of medium-voltage AC switchgear (from 10 kV AC input), rectifier units, DC switchgear, DC power distribution panels, substation PSCADA systems, security systems, and environmental control systems—delivering DC 1500 V output. Key advantages include compact footprint, convenient installation, low construction and operational/maintenance costs, high reliability, strong environmental adaptability, and advanced digital intelligence. Major equipment and core components—including DC circuit breakers, DC isolating switches, and microcomputer-based DC protection and control devices—are all proprietary Wanlong Electric products, enabling comprehensive one-stop product selection and supporting unattended substation operation and management platforms.

Integrated Intelligent DC Traction Electrical System Solution

“An integrated intelligent DC traction electrical system solution.” We are committed to providing domestically produced, intelligent, and highly reliable new alternative solutions for urban rail transit, trolleybuses, and mine‑site DC traction systems.

Wanlong Electric’s innovative solutions cover the full range of core equipment, from AC 10 kV to DC 1650 V. Our strengths lie in:
- The self‑developed ST700 series DC microprocessor‑based protection devices;

- The WDQ series complete sets of DC traction equipment; and
- The WKS‑DTMS2000 intelligent monitoring and management system—collectively enabling comprehensive control over power conversion, load distribution, and fault protection.

In addition to supplying medium‑voltage AC switchgear, rectifier units, DC switchgear, and other hardware, we have also built substation PSCADA systems and unmanned operation‑and‑maintenance platforms, significantly enhancing system response speed and remote O&M capabilities.

This solution is widely applicable across diverse scenarios:
Whether it’s efficient propulsion for subways and light rails, flexible power supply for modern trolleybuses, or robust performance under harsh conditions for electric locomotives in metallurgical mines, Wanlong Electric can deliver customized system integration and support with core components.

Practice is the sole criterion for testing truth. Wanlong Electric’s solutions have successfully served:
- The intelligent upgrade and retrofit of DC 600 V/DC 1650 V traction substations for Jinan Public Transport and Beijing Trolleybus Company;
- The upgrade of the mine‑site DC traction system at Benxi Iron & Steel Group;
- And, beyond borders, the provision of “intelligent box‑type DC traction substations” for Mexico City’s modern trolleybus project, earning high recognition from international clients.

About Wanlong Electric

We are a high-tech enterprise specializing in intelligent DC traction power systems, motor integrated control systems, and smart power distribution solutions.

Since 2008, we have been committed to independent innovation in core technologies, serving customers worldwide with reliable electrical solutions.

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