In Ghana’s power grid emergency repair, mining area temporary power supply, oil field power protection, industrial park capacity expansion, post-disaster power restoration and large-scale infrastructure projects, the 15MVA-33kV mobile substation has become the most practical power support equipment in the region with its core advantages of ready-to-use, rapid deployment, flexible relocation and high integration. Hengfengshuai Electric specializes in the R&D and manufacturing of mobile substations, strictly abides by IEC, IEEE, PURA and Ghana power grid standards, and provides Ghana with a full-process integrated solution covering overall design, vehicle-mounted integrated manufacturing, intelligent protection configuration, cross-border transportation and delivery, on-site rapid commissioning and full-life-cycle operation and maintenance, truly realizing "ready to use upon arrival and reliable upon power connection".

I. Project Overview and Core Technical Parameters of 15MVA-33kV Mobile Substation
This solution is tailor-made for Ghana’s high temperature, high humidity, coastal salt fog, field dust and complex road conditions. The 15MVA-33kV mobile substation adopts a vehicle-mounted integrated structure, which is a complete mobile distribution station integrating main transformer, high-voltage switchgear, low-voltage power distribution cabinet, protection and control device, cooling system, grounding system, lighting, fire protection and auxiliary circuit. It can be quickly connected to the grid upon arrival at the site without a large number of civil works and on-site assembly.
Core Technical Parameters of 15MVA-33kV/11kV


II. Customized Design and Development of 15MVA-33kV Mobile Substation
1. Electromagnetic and Power Grid Adaptation Design of the Whole Station
Optimize the impedance, loss and temperature rise parameters of the mobile substation according to the characteristics of Ghana’s 50Hz power grid, multiple impulse loads and unstable voltage.
The main transformer adopts low-noise, low-loss and strong overload design, combined with an integrated high and low voltage system to improve the stability of the whole station.
The insulation is designed to the enhanced outdoor level of 33kV to improve the protection against lightning and switching overvoltages, meeting the requirements of unobstructed field operation.
2. Vehicle-mounted Mobile Structure Design (Core of Mobility)
Vehicle-mounted type: Special reinforced chassis, shock-absorbing suspension and braking system to meet long-distance transportation on Ghana’s paved/unpaved roads.
Optimize the center of gravity of the whole station and conduct finite element strength verification to ensure no deformation, resonance or rollover during transportation.
C5 heavy anti-corrosion for the box body, with rain shelter, ventilation shutters and salt-fog resistant structure, adapting to coastal and mining corrosive environments.
Built-in cable compartment, tool compartment and spare parts compartment, with high-voltage cable heads, low-voltage buses and grounding wires integrated on board.
3. Primary and Secondary System Integration Design (Key to Mobile Substation)
High-voltage side: Integration of 33kV load switch/vacuum circuit breaker, fuse, earthing switch, lightning arrester and cable terminal.
Low-voltage side: Integration of 0.4kV incoming cabinet, outgoing cabinet, reactive power compensation and metering device.
Protection system: Complete configuration of overcurrent, instantaneous trip, overload, oil temperature, gas and differential protection.
Monitoring system: Remote monitoring of oil temperature, oil level, voltage, current and power factor, supporting unattended operation.
4. Compliance Design Review
A joint review by technical, technological, quality and foreign trade teams to ensure the full compliance of the mobile substation, meeting Ghana’s PURA access, power grid connection, transportation road access and on-site safety requirements before production.
III. Intelligent Manufacturing and Complete Assembly of 15MVA-33kV Mobile Substation
1. Material Procurement and Whole-station Inspection
100% factory verification of main transformer materials, high and low voltage components, switches, protection devices, cables and chassis structures, with certificates of origin and certification reports for key components to ensure the reliability of the whole station.
2. Manufacturing of Core Transformer Components
High-precision lamination of iron core, constant temperature and humidity winding of coil, anti-corrosion welding of oil tank, vacuum drying and vacuum oil injection to ensure the long-term stability of the core body of the mobile substation.
3. Whole-station Integrated Assembly (Feature of Mobile Substation)
a. Position and fix the main transformer, and install shock absorbers. b. Synchronously integrate high-voltage cabinets, low-voltage cabinets and measurement and control panels into the vehicle-mounted base. c. Arrange, connect and mark primary and secondary cables to complete the circuit connection of the whole station. d. Integrate cooling system, fire protection, lighting and grounding system. e. Clean, seal, rust-proof and loosen-proof the whole station to withstand long-distance transportation vibration.
4. Whole-station Commissioning and Pre-acceptance
Complete the commissioning of control circuit, protection logic, interlock function and metering accuracy to ensure the mobile substation is "ready for direct operation" when leaving the factory.
IV. Factory Acceptance Test (FAT) of the Whole Station
The mobile substation is tested in accordance with the whole-station test standards, far exceeding the test requirements for a single transformer, to ensure the safety and reliability of the complete system.
Routine Tests of Transformer
DC resistance, transformation ratio, connection group, insulation, oil quality, loss and temperature rise test
High and Low Voltage Complete Set Tests
High-voltage circuit resistance, withstand voltage, mechanical characteristics and grounding continuity test
Low-voltage bus temperature rise, protection action and interlock function test
Special Tests of the Whole Station
Partial discharge, lightning impulse and noise test
Whole-station insulation coordination and protection setting linkage test
Vehicle-mounted vibration simulation, tilt test and salt fog environment verification
Temperature rise and full-load operation simulation test A full-station FAT report will be issued upon passing the tests, supporting Ghana’s grid connection acceptance.
V. Cross-border Packaging and Transportation of Mobile Substation
1. Whole-station Protection
Reinforce and fix high-voltage bushings and insulators to prevent damage from shaking.
Fill the whole station with nitrogen for micro-positive pressure protection and sealed moisture-proof.
Install a 3D impact/tilt recorder to monitor the transportation status throughout the process.
2. Export Packaging
The whole station is wrapped with anti-rust and waterproof cloth, and accessories are packed in wooden cases; the box body is marked with Ghana customs clearance signs, lifting points, center of gravity, rainproof and upside-down proof marks.
3. Cross-border Logistics
The whole station is transported by sea ro-ro/plat form cabinet, suitable for vehicle-mounted mobile substations.
Oversized transport vehicles are used inland, and Ghana’s over-limit transportation permit is obtained.
Route optimization to avoid height limits, weight limits and weak bridges to ensure safe delivery.
VI. On-site Delivery, Installation and Rapid Commissioning in Ghana
1. Unpacking Acceptance
Check the appearance, fasteners, sealing, nitrogen pressure and impact data of the whole station, and verify the whole-station certificate, primary and secondary drawings and grid connection data.
2. Rapid On-site Installation of Mobile Substation (Core Advantage)
a. Whole-station positioning: Hoist/traction to the foundation, level, fix and ground. b. Cable connection: Quick connection of high-voltage incoming and low-voltage outgoing (reserved standard interfaces). c. System inspection: Confirm oil level, wiring, protection, cooling and fire protection item by item. d. No large amount of assembly required: Installation time is shortened by more than 70% compared with traditional substations.
3. On-site Acceptance Test (SAT)
Retest of insulation, oil quality, DC resistance and transformation ratio
Whole-station AC withstand voltage, circuit continuity and protection transmission
Verification of measurement and control, metering and communication functions
4. Rapid Power-on Commissioning
5 no-load impulse closing operations
24-hour no-load operation
Load trial operation, monitoring voltage, current, temperature and noise
Immediately connect to the grid for power protection upon passing, with technical personnel on-site guidance and supervision
VII. Full-process Quality Control and Whole-station Data Delivery
Key Quality Control Nodes
Design: Full compliance of the mobile substation to meet transportation, operation and grid connection requirements
Production: Dual inspection of main transformer + high and low voltage complete sets, standardized whole-station assembly
Factory: Full-item FAT test of the whole station, no delivery if unqualified
Transportation: Whole-process monitoring, shock-proof, tilt-proof and moisture-proof
On-site: Pass SAT test to ensure performance consistent with factory conditions
Whole-station Data Delivery (Special for Mobile Substation)
Whole-station factory certificate and FAT test report
Schematic diagram, wiring diagram and layout diagram of primary and secondary systems
Instruction manuals of high-voltage cabinets, low-voltage cabinets and protection devices
Installation, operation and maintenance manual (English)
Ghana PURA certification and data required for grid connection
VIII. Solution Summary
Hengfengshuai Electric’s Ghana 15MVA-33kV mobile substation full-process solution takes whole-station integration, flexible movement, rapid deployment and reliable operation as its core competitiveness, completely solving the pain points of slow emergency power supply, long civil construction cycle and poor environmental adaptability in Ghana.
The product is widely used in:
Power grid emergency repair and rapid post-disaster power restoration
Temporary/semi-permanent power supply for mines and oil fields
Rapid power connection and capacity expansion for industrial parks and large-scale infrastructure
Urban distribution network load transfer and maintenance power protection
With mature mobile substation design and manufacturing capacity, complete-station certification qualifications, perfect cross-border delivery and localized services, Hengfengshuai Electric (hfs@hengfengshuai.com) provides safe, efficient and worry-free power support for Ghana, and boosts the modernization of Ghana’s power grid and rapid economic development.