Rapid Construction of Transformer Stations: Process and Optimal Solutions

Rapid construction of transformer stations ensures progress and quality through meticulous preparation, synchronous management from material preparation to acceptance.

Meticulous Preparation for Transformer Station Construction

Rapid construction of transformer stations requires meticulous preparation, from inspection of materials and equipment to preparing design drawings and legal procedures. Checking materials and equipment before bringing them to the site helps avoid disruptions due to shortages or non-standard equipment. Additionally, full preparation of means, equipment, and related permits is necessary to ensure that administrative progress is uninterrupted.

Actual Survey and Location Determination

In every transformer station construction project, conducting a real survey and choosing an optimal location is the first important step. Geographic factors, soil conditions, and existing infrastructure must be carefully assessed to ensure that the transformer station can best support the system. Any deviation from the original transformer station design needs to be thoroughly discussed with the investor and relevant parties.

Detailed Planning

Detailed planning for building a transformer station is the next necessary step. In it, it is necessary to clearly determine the work progress, reasonably allocate personnel, and reserve necessary equipment and materials. The plan must also include coordination for power construction, ensuring that construction safety procedures are always strictly adhered to.

Preparation of Materials and Equipment

Before starting construction, all materials and equipment, from machines to insulating materials, need to be checked to ensure they meet technical and safety standards. Reputable manufacturers like Thibidi, EMC, ABB, and Schneider are often chosen to ensure the highest quality.

Technical and Legal Document Check

Completing all legal procedures and preparing full technical documents is a prerequisite condition before starting a power construction project. Permits for connection to the national power grid and schematic diagrams need to be readily available to avoid any administrative delays.

Preparation of Workforce and Technical Team

The construction team needs to be trained professionally in procedures related to transformer stations and safety in power construction. They need to be able to quickly identify and handle situations that arise on the ground.

Main Construction Steps

Meticulous preparation will lead to a smooth construction process, including:

1. Digging foundations and underground cable trenches.
2. Installing cable protection pipes and grounding systems.
3. Building main components such as support frames and transformers.
4. Connecting equipment and power systems.
5. Installing and checking necessary safety signs.
6. Conducting experiments and accepting each step to ensure operational safety.

Careful preparation will help avoid unnecessary risks, ensuring the progress and quality of transformer station construction.

Determining Location and Installing Main Components of the Transformer Station

The accurate determination of the transformer station’s location is crucial for its operational performance and cable pulling, connection convenience. Installing grounding systems, transformer supports, racks, and technical boxes plays an important role in electrical safety control. The installation of low voltage cabinets, transformers, RMU cabinets, and other electrical devices is carried out according to a detailed plan to ensure effective and safe operation.

The location of the transformer station is a strategic factor in ensuring effective operation and maintenance of the power system. For effective transformer installation, the transformer station location should be chosen based on:

1. Close to the load center:

• Placing the transformer station near the area with high power consumption is necessary to minimize power losses on transmission lines.
• Large capacity transformers are prioritized to be placed near the load center, while smaller ratio transformers can be placed closer to the power source.

1. Safety and Stability:

• The station location must meet safety standards for fire and explosion, and limit the impact of dust and corrosive gases.

1. Convenience for Operation and Maintenance:

• The location must be easily accessible for maintenance and monitoring systems, especially the grounding system.

1. Economical and Technical Efficiency:

• The location with the lowest initial investment and operational costs should be chosen.

1. Optimal for Travel and Production Activities:

• Avoid placing the station in locations that obstruct traffic or production activities while ensuring ventilation and fire safety conditions.

Main Components to be Installed:

• Main Transformer: The most essential component responsible for voltage transformation.
• Control and Protection Cabinets: Includes systems such as overcurrent protection, overvoltage, and lightning protection.
• Disconnect Devices: Like circuit breakers, necessary for executing disconnection maneuvers when maintenance is needed.
• Power Measurement System: This location must fit the connection point to ensure accuracy and convenience for monitoring.
• Lightning Protection and Grounding System: Protects the station and equipment from adverse weather conditions.
• Insulation and Environmental Protection System: Includes insulating devices and anti-dust, anti-corrosion measures.

Transformer Station Installation Process:

1. Survey and Plan: Comprehensive evaluation of the location and operational requirements.
2. Location Selection: Apply stated technical and safety criteria to choose a location.
3. Detailed Design: Review equipment layout and power system to optimize operation and maintenance.
4. Foundation and Infrastructure Construction: Proceed with the construction of concrete bases for the station.
5. Equipment Installation: Complete the installation of transformers, control cabinets, and disconnection systems.
6. Test and Acceptance: Conduct checks and trial operations before official use.

Power Measurement Location

• Determined at or near the main power connection point. If not feasible, agreement on location and appropriate power conversion plan are necessary.

Ensuring standards for the factors above will ensure that the transformer station system operates stably and sustainably in harsh environments.

Installing underground cables and effective connections

Rapid transformer station construction is incomplete without installing underground cables and making connections. Scheduling reasonable power cuts avoids impacting surrounding areas. Laying 24kV underground cables is conducted following strict technical regulations, from cable pulling to connection according to the electrical diagram. After installation, equipment testing and adjustment ensure stable and safe operation.

The underground cable construction process plays a very significant role in building underground electrical systems in Vietnam. Specifically, this process requires stringent adherence to each phase from surveying, planning to execution.

Detailed Construction Process:

1. Survey and Construction Plan

• Conduct terrain inspection, mark locations, and set up sectional plans for trenches to ensure underground cable construction meets technical requirements.
• Complete necessary legal formalities like permits for land excavation.

1. Cable Trench Digging

• Ensure trenches have proper technical width and depth to avoid 24kV cables being affected by the underlying earth and rock.
• Use a combination of machinery and manual labor to dig and move earth, ensuring no environmental impact.

1. Install Protective Cable Pipes

• Lay a base layer of sand and proceed to install protective pipes using HDPE or specialized pipes.
• Use special adhesives and tools to ensure pipes are not twisted and no leaks occur.

1. Cable Pulling and Installation

• Combine devices like pulleys and cranes to gently pull cables through pipes, avoiding damage to cable covers.
• Combine pull and push methods to reduce impact force, optimizing construction work.

1. Completion and Acceptance

• Cover the final layer of sand, then backfill and compact the soil to ensure ground stability before and after transformer station construction.
• Conduct cleaning and inspection of the entire area, ensuring acceptance according to technical standards.

Effective Safe Construction Measures:

• Prepare equipment and materials in advance, ensuring they meet standards and design.
• Carefully dig trenches and place pipes to ensure safety and long-term efficiency. Use specialized equipment for underground cable construction to avoid cable twisting.
• Train and supervise workers regularly to minimize potential job risks.

Notes for Underground Cable Connection:

• Perform connections under optimal conditions, free from dust and moisture.
• Use specialized tools and materials, ensuring good insulation.
• After connecting, check contact and insulation levels, keeping detailed records for maintenance purposes.

Underground cable construction is a complex process requiring high precision. Strict compliance with procedures and effective application of safety measures will ensure sustainable and efficient operation for the entire system.

Testing and Acceptance of Transformer Station

After completing installation steps, conducting testing and acceptance of equipment is necessary to ensure the transformer station’s operation. Testing includes calibration for insulation, protection, and operation. Conduct the first technical acceptance, checking the entire system before operation to ensure safety and efficiency. Cleanly restoring the construction site is the final step to avoid affecting the environment and surrounding activities.

Transformer Station Testing Procedure

Transformer station testing is a crucial step to ensure operational quality and efficiency. This process focuses on three main items:

• Material and Concrete Mix Testing: Ensuring building materials and concrete components meet all technical requirements, providing a foundation for durable transformer station construction.
• Electrical Equipment Check: Test key equipment such as transformers, electrical panels, protective relays, and wiring systems to verify compliance with design and technical standards.
• Trial Power Connection: Conduct no-load power connection for the transformer within 24 to 72 hours to check operation and promptly detect potential faults.

Acceptance Procedure for Transformer Stations

Acceptance of transformer stations aims to evaluate the overall quality of the project, adhering to technical and safety standards:

1. Preparation for Acceptance: The investor needs to prepare a complete acceptance dossier, including a comprehensive construction report, individual item records, design documents, and inspections.
2. Conducting Acceptance: The acceptance committee will include representatives from the investor, contractor, supervisory consultant, and quality control. Construction items like building structure, electrical equipment, and protection systems will be thoroughly checked.
   • Cold Acceptance: Inspect materials, equipment, measure resistance, and power cable systems before connecting to the grid.
   • Power On Acceptance: Conduct an overall check after powering on to ensure operating parameters meet standards.
3. Project Handover: After successful acceptance, the project will be handed over to the operations management unit, ensuring it meets all technical and safety standards.

Conclusion

Transformer station testing does not only stop at material and equipment checks but extends through a comprehensive acceptance process to ensure the transformer station’s safe and efficient operation, meeting current technical and construction standards.

Measures to Accelerate the Construction Progress of transformer station construction

To expedite transformer station construction, prepare all materials and equipment before construction to avoid waiting. Utilizing modern technology like specialized machinery helps shorten time. Tasks need to be broken down and executed synchronously by different construction teams to reduce power cut time and limit errors. Training qualified personnel, along with enhancing technical supervision, helps detect and promptly handle incidents.

• Detailed Planning and Progress Management: Rapid construction requires a detailed plan that includes identifying specific work items, execution time, and requirements for manpower, materials. Tight progress management with specific goals for each phase helps monitor and effectively adjust progress.
• Enhancing Preparation Efforts: Ensure that all necessary materials and equipment are fully prepared, avoiding disruptions due to shortages. Training staff is also a decisive factor to ensure technicians have sufficient knowledge of techniques and labor safety.
• Using Modern Technology: Utilize modern transformer stations, especially digital transformer technology, to minimize the volume of cables, trench size, and equipment. Remote monitoring technology also supports quickly handling any arising issues.
• Optimize Construction Process: Construction needs to follow a reasonable sequence to ensure synchronization and continuity. Applying advanced construction technology for continuous improvement and implementing innovative measures to speed up construction.
• Ensure Labor Safety and Quality: Labor safety is a top priority; equip employees with full labor protection equipment. Regular quality checks are necessary to ensure technical standards are adhered to.
• Enhance Cooperation and Communication: Effective communication with contractors, suppliers, and local authorities must be maintained to promptly handle arising issues. Multilateral cooperation facilitates favorable conditions for incident management processes.
• Invest in Modern Equipment: Use lifting devices and cranes to move transformers and large equipment into position to optimize time and effort.
• Manage and Monitor Construction Progress: Implement daily progress reports to closely monitor and timely adjust the construction plan as needed.
• Acceptance and Handover: Conduct adjustment experiments and technical acceptance before operation to ensure maximum quality and safety for the transformer station.

Rapid Construction of transformer stations not only optimizes costs but also enhances operational efficiency through a rigorous process from preparation to acceptance. Applying modern technology, managing resources efficiently, and technical supervision are important factors that help the project meet technical and progress requirements.

Contact QuangAnhcons at Hotline: +84 9 1975 8191 for support in rapid and quality transformer station construction.

QuangAnhcons specializes in providing transformer station construction services with skilled technical teams, utilizing modern technology to ensure project progress and quality.