Solutions ng Pad-Mounted Transformer: Mas Pinakamahusay na Paggamit ng Espasyo at Pagbabawas ng Gastos kumpara sa mga Tradisyonal na Transformer

1. Integrated Design & Protection Features ng American-Style Pad-Mounted Transformers

1.1 Integrated Design Architecture

Ang mga American-style pad-mounted transformers ay gumagamit ng isang pinagsamang disenyo na naglalaman ng pangunahing komponente - core ng transformer, windings, high-voltage load switch, fuses, at arresters - sa loob ng iisang langis na tank, gamit ang insulating oil bilang insulasyon at coolant. Ang struktura ay binubuo ng dalawang pangunahing bahagi:

• ​Front Section:​​High & Low Voltage Operation Compartment (may elbow plug-in connectors na nagbibigay ng live-front operation).
• ​Rear Section:​​Oil filling compartment at cooling fins (oil-immersed cooling system).

1.2 Dual Protection Mechanism

• ​Plug-in Fuses:​​Nagbibigay ng proteksyon laban sa fault currents sa secondary-side.
• ​Backup Current-Limiting Fuses:​​Nagbibigay ng proteksyon laban sa major primary-side faults.
• ​Overload Capacity:​​Ang orihinal na disenyo ay nagpapahintulot ng 2-hour sustained overload sa 200% rated load; karaniwang ina-modify sa domestiko upang maging 130% rated load para sa 2 hours.

1.3 Principle Differences vs. Conventional Transformers

Ang mga conventional transformer setups ay gumagamit ng hiwalay na "switchgear - transformer - distribution equipment" layouts. Ang mga American-style pad-mounted transformers naman ay gumagamit ng oil-immersed integration upang minimisahan ang cable connections, na nagreresulta sa 40%-60% mas compact na struktura.

2. Core Differences: Pad-Mounted Transformers vs. Conventional Transformers

3. Application Benefits of Pad-Mounted Transformers in Typical Scenarios

3.1 Urban Grid Renovation

• ​Case Study:​​Isang Shanghai power utility ay nag-deploy ng 1,103 American-style pad-mounts (49% share) sa mga residential communities. Ang isang proyekto ng renovation ng primary school na may budget na RMB 640,000 ay natapos sa 15 days.
• ​Noise Reduction Solution:​​Na-implement ang "shell - acoustic cotton lining - shell" sound absorption structure, na naka-reduce ang noise mula 60dB hanggang sa below 40dB, compliant sa GB 3096 night-time standard.

3.2 Renewable Energy Projects (Wind Farms / Solar PV)

• ​Cost Efficiency:​​Ang 35/0.69kV wind farm step-up transformer ay may cost na RMB 410,000/unit, na RMB 100,000-150,000 mas mababa kaysa sa European-style units. Ang line losses ay naka-reduce ng 10%-15%.
• ​Anti-Corrosion Process:​​Sa coastal areas, ginamit ang "shot blasting derusting + epoxy zinc-rich primer + polyurethane topcoat". Ang equipment sa isang Guangdong wind farm ay walang corrosion matapos ang 8 months.

3.3 Temporary Power & Peripheral Scenarios

• ​Advantages:​​Small size (easy transport); elbow connectors enable live-front operation; suitable for construction sites & remote areas.
• ​Limitations:​​Requires integration with ring main units (RMUs) to enhance power supply reliability.

4. Optimal Application Scenarios & Selection Guidelines

4.1 Priority Application Scenarios

• ​Space-constrained areas:​​Old urban districts, narrow streets.
• ​Renewable Energy Projects:​​Wind farms, distributed PV grid connection points.
• ​Temporary Power Supply:​​Construction sites, temporary event venues.
• ​Cost-sensitive projects:​​Distribution network construction with limited initial investment budget.

4.2 Selection Considerations

• ​Environmental Adaptation:​​Use triple-protection coating (epoxy zinc-rich primer + polyurethane topcoat) in high salt-spray regions. Enhanced cooling design required in high-altitude areas.
• ​Reliability Trade-off:​​Prioritize European-style units for high-rise buildings and critical public facilities. Avoid American-style units in areas with rapid load growth (capacity increase requires pad reconstruction).
• ​Noise Control:​​Utilize noise-reduction enclosures or flexible connections in urban residential zones to mitigate low-frequency noise impact.