Coal Mining Industry Solutions and Cases

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Core Industry Pain Points

(1) Extreme Underground Environment Underground conditions feature high humidity (over 98%), high dust levels, and high methane concentrations, accompanied by issues such as corrosive gas and dripping water. Ordinary UPS components are prone to short circuits due to moisture, burning out from dust accumulation, and rapid degradation of insulation performance. The failure rate is 90% higher than in surface scenarios, posing significant safety hazards.

(2) Complex and Highly Fluctuating Power Grid Environment Coal mining equipment (such as shearer loaders and scraper conveyors) constitutes high-power nonlinear loads with frequent start-stop cycles. Grid harmonics (THDi) exceed 25%, and voltage fluctuations reach ±30%. This easily causes critical control equipment (e.g., gas monitoring, ventilation, and drainage systems) to crash, leading to underground ventilation and drainage failures and posing major safety risks.

(3) Strong Load Impacts Underground and on the Surface Mining equipment such as ventilators, drainage pumps, and hoists have starting currents reaching 7-10 times the rated value, classifying them as high-impact loads. Ordinary UPS systems cannot withstand instantaneous high currents, frequently triggering overload protection shutdowns. Power outages to drainage or ventilation equipment can easily lead to safety accidents such as water accumulation and gas accumulation underground.

(4) High Difficulty in Multi-site O&M for Underground and Surface Operations Surface stations are scattered, and underground working faces are deep. Equipment deployment points are numerous, and some areas lack signal coverage or are difficult to access. Traditional UPS systems lack dedicated underground remote monitoring functions. After a fault occurs, manual on-site inspection is required, with fault localization taking up to 6-8 hours. Passive repairs can easily exacerbate safety hazards.

Corresponding Solutions
(1) Dedicated Explosion-proof Protection Solution for Mining Adopts an explosion-proof design with a thickened explosion-f casing and three-proof coating treatment. It is suitable for underground environments with high humidity, high dust, and high gas concentrations. It can withstand water splashing and corrosion from gases component insulation performance by 90%, reduces equipment failure rates by 85%, and eliminates the safety hazard of electric sparks at the source.

(2) Dedicated Power Grid ion Solution for Coal Mines Adopts 12/18-pulse rectification with input THDi < 3% and power factor ≥ 0.99. Ibilizes grid voltage fluctuations within ±5%, effectively filters out higher harmonics generated by high-power mining equipment, ensures the stable operation of gas monitoring and ventilation/drainage control eq, and avoids underground safety accidents.

(3) Ultra Anti-impact Load Power Supply Solution Deeply optimizes the winding design of mining power frequency transformers to enhance instantaneous overload capaan withstand a 150% rated load impact for 1 minute, easily meeting the starting requirements of strong impact loads such as ventilators and hoists. It eliminates shutdown ies caused by overloads and ensures the continuous operation of key underground equipment.

(4) Integrated Intelligent O&M Solution for Surface and Underground Equipped with a monitoring platform and monitoring modules fornd equipment, it enables centralized management and real-time monitoring of UPS equipment on the surface and at underground working faces. It supports wireless fault warnings in gas environments, allows remote fault point ocalization, shortens MTTR to within 40 minutes, and reduces the costs and safety risks associated with manual underground inspections.

Scope of Application
It covers various coal mining and supporting enterprises, including state-owned large coal mines, local small and medium-sized coal mines, ot coal mines, and underground mining coal mines. It is suitable for core scenarios such as underground main control rooms, surface dispatching centers, underground substations, ventilation fan rooms, drainag pump rooms, gas monitoring stations, mine equipment maintenance workshops, and coal washing workshops. It meets the uninterrupted power supply requirements for various mine loads, including mine PLC control systems, gas monitorin ventilation and drainage frequency conversion equipment, underground communication equipment, coal sorting equipment, and personnel positioning systems.

Success Cases：