Mongolia Gold Mine High Voltage Reactive Power Compensation Project

Mongolia Gold Mine High Voltage Reactive Power Compensation Project

01 Project Overview

1.1 Project Background

In November 2025, 30 units of the RWTBBZ-0.75-720 kvar reactive power compensation units were deployed for Mongolia’s gold mine power grid upgrade project.Developed and manufactured by RW Energy, the equipment was installed across multiple mining sites and substations in South Gobi Province.These units deliver critical reactive power compensation, voltage stabilization, and power quality enhancement.
These reactive power compensation units are specifically engineered for the 35 kV mining grid operating at 50 Hz.Customized for Mongolia’s extreme continental climate, they withstand temperatures from -25°C to +45°C, frequent sandstorms, and significant diurnal variations.Their robust construction features corrosion-resistant cabinets, wide-temperature capacitors, and fully sealed dust-proof structures.Under demanding conditions—including ±15% voltage fluctuation and dynamic load changes—the units consistently maintain a power factor above 0.95.
Backed by localized O&M services and remote monitoring, the solution has earned strong recognition from Mongolian mining enterprises, ensuring stable, reliable power for operations and infrastructure.1.2 Technical Parameters

02 Product Assembly

The RWTBBZ-0.75-720 kvar reactive power compensation unit assembly strictly complies with GB/T 15576-2020. The core process follows "Component Screening → Modular Assembly → Electrical Connection → Debugging and Calibration" to ensure equipment stability and precise compensation. Specific procedures are as follows:

• Component Screening and Preprocessing: Core components (capacitor banks, controller, switching devices, etc.) are selected per 720 kvar capacity and 0.75 kV voltage requirements. Component tolerances are controlled; cleaning and anti-corrosion treatments applied. Enhanced dust-proof sealing implemented for outdoor applications.

• Modular Assembly and Fixing: Capacitor banks assembled in groups; core power components mounted on frame/cabinet; control components installed on operation panel. Outdoor frame-type units equipped with protective enclosures and heat dissipation structures.
• Electrical Connection and Insulation Treatment: Wiring executed per schematic diagram, emphasizing signal and power connections. Insulation tests and protection measures performed. Parallel-connected discharge coils installed to ensure operational safety.
• Debugging, Calibration, and Parameter Adjustment: Controller activated to simulate operating conditions; sampling accuracy and switching thresholds calibrated; switching logic and compensation accuracy debugged; all protection functions verified.

03 Inspection & Testing

• Temperature Rise Test: Reactive power compensation validates thermal stability under rated load. Implemented Standard: IEC 61921:2005, GB/T 15576-2020
• Environmental Testing: Confirms performance in extreme temperatures, humidity, dust, and sand. Implemented Standard: IEC 60068-2 series, GB/T 2423
• EMC Test: Ensures immunity to grid harmonics and electromagnetic interference. Implemented Standard: IEC 61000-6-2 (immunity), IEC 61000-6-4 (emission)
• Harmonic Withstand Test: Verifies stable operation in high-harmonic industrial environments. Implemented Standard: IEC 61000-4-13, GB/T 17626.13

04 Packaging and Transportation

4.1 Packaging

• Structural Protection: Reactive power compensation ISPM 15 compliant fumigated wooden crates (skid-mounted or frame-type); heavy equipment mounted on steel structural bases. Entire crate covered with waterproof tarpaulin; main unit secured internally with EPE cushioning pads and straps; desiccant and humidity indicator cards included.

• Component Protection & Markings: Fragile parts (e.g., porcelain bushings) protected by dual-layer foam brackets and rigid covers; metal components wrapped in VCI anti-corrosion paper. Outer crate marked with international symbols (“↑”, “Moisture-Proof”, “Handle with Care”), labeled with project number, center of gravity, destination. Waterproof document pouch attached containing packing list, certificate of conformity, and installation sketch.
• Transport Adaptation: Sea freight: added waterproof sealing strips and air-column shock-absorbing bags (GPS shock recorder optional for premium projects); land transport: reinforced frames with anti-slip pads; oversized units labeled with warning signs. Export packaging strictly complies with destination country standards.

4.2 Transportation

• Method: Ocean freight selected for long-distance shipment of large power equipment, ensuring stable transit conditions and controlled environmental exposure.
• Carrier: Experienced professional logistics partners engaged to guarantee safe, on-time delivery and full support for end-to-end customs clearance procedures.

05 On-site Implementation and Summary

5.1 On-site Implementation
RW Energy executed the reactive power compensation project across multiple gold mines and substations in Mongolia’s South Gobi Province. The team completed end-to-end implementation: pre-deployment surveys, stakeholder coordination, and climate-adapted preparations; strict unloading, inspection, and installation of RWTBBZ-0.75-720 kvar reactive power compensation units; parameter optimization for extreme conditions; and concurrent deployment of localized O&M, training, and emergency protocols to ensure sustained stability.

5.2 Implementation Summary
This reactive power compensation project concluded safely and on schedule with zero incidents, damage, or delays. All 30 units delivered measurable performance gains: system power factor rose from 0.72 to 0.96+ (exceeding the 0.95 target), voltage fluctuation narrowed from ±15% to ±4.8%, and grid transmission losses decreased by 18.5%. Over six months of continuous operation under extreme conditions (−25°C to +45°C, sandstorms), units maintained 99.95% availability with zero unplanned outages. The solution reduced reactive power demand by 620 kvar per site and delivered an estimated annual energy cost saving of $125,000 across the mining cluster. These quantifiable outcomes earned formal commendation from Mongolian mining stakeholders and validated RW Energy’s technical excellence and overseas execution capability. The deployment established a proven benchmark for extreme-environment reactive power compensation solutions, with RW Energy committed to ongoing O&M optimization and global market expansion.

06 Full Lifecycle Managed O&M Service

End-to-end managed service for reactive power compensation units across all stages: procurement adaptation, installation/commissioning, routine O&M, maintenance/repair, emergency fault response, and decommissioning. Dedicated engineers ensure closed-loop management, full-process traceability, and uninterrupted operational safety. Universally adaptable to units of varying voltage levels and capacities—eliminating power reliability concerns throughout asset life.
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