Project Overview

The State Grid Tibet Angduo 500kV Photovoltaic Collection Station Project is a renewable energy grid-connection supporting project located in Tibet, China. The site is situated at an altitude of approximately 4,200–4,800 metres, where power equipment must operate under combined high-altitude, cold-climate and long-term outdoor exposure conditions.

Jiangsu Tengqi Electric Power Technology Co., Ltd., operating under the TengQi Technology (TQT) brand, supplied custom transformer plate radiators for a BKS-60000/35 transformer used in this 500kV photovoltaic collection station application. The project combined a project-specific radiator arrangement with a B05 coating system designed to support the corrosion-protection requirements of the highland outdoor environment.

Project Configuration

High-Altitude Application Requirements

A 500kV photovoltaic collection station in the Tibetan plateau faces environmental conditions that differ significantly from conventional low-altitude substations. In addition to their heat-dissipation role, transformer radiators must be considered as part of the equipment package for a site affected by low atmospheric pressure, severe cold, frost and icing, intense solar radiation, frozen ground and prolonged outdoor exposure.

• Altitude of approximately 4,200–4,800 metres: a low-pressure environment requiring coordination with the overall high-altitude equipment design.
• Cold and low-temperature operation: material suitability, structural reliability and manufacturing quality are important for outdoor equipment exposed to severe winter conditions.
• Strong ultraviolet radiation and temperature cycling: sustained sunlight and large daily temperature differences increase the importance of coating durability and surface-protection continuity.
• Outdoor exposure and frozen-ground conditions: the radiator configuration must align with the project’s long-term outdoor equipment requirements.
• Renewable energy collection and grid connection: the cooling components need to support the operating requirements of transformers serving concentrated photovoltaic power integration.

TengQi Technology Plate Radiator Solution

For this high-altitude transformer radiator project, TengQi Technology configured PC2700-25/520 plate radiators for the BKS-60000/35 transformer. Fourteen radiator groups were supplied as the supporting cooling-component arrangement for one unit of equipment.

The solution focused on matching radiator selection, structural manufacturing and surface protection with the operating conditions of the Tibet photovoltaic collection station. Low-temperature suitability considerations and a dedicated corrosion-protection configuration were incorporated into the project manufacturing process to support the transformer’s outdoor cooling requirements.

Coating and Corrosion Protection Design

The transformer plate radiators were supplied with a B05 coating system and a 200 μm total film thickness, providing a corrosion-protection configuration rated up to C4 grade. This surface-protection arrangement was selected to address the project’s highland outdoor exposure requirements.

Welded areas, folded edges and exposed exterior surfaces are key considerations in the corrosion-protection design of plate radiators. While local humidity levels and corrosive media require site-specific evaluation, UV exposure, temperature cycling, condensation risk and long-term outdoor service can all affect coating integrity and metal-surface protection.

TengQi Technology integrated the coating system and film-thickness requirements with the radiator manufacturing process. Specific coating materials, surface-preparation methods, inspection items and acceptance criteria are subject to the applicable project technical documentation and mutually confirmed quality requirements.

Manufacturing and Delivery Focus

The implementation of this project centred on aligning transformer plate radiator manufacturing with the requirements of a high-altitude renewable energy transmission and substation environment. Key delivery considerations included:

1. Completing radiator model selection and quantity configuration in accordance with transformer supporting requirements.
2. Considering material and low-temperature adaptability for high-cold outdoor conditions.
3. Applying the 200 μm coating configuration in support of the project’s C4 corrosion-protection requirement.
4. Maintaining manufacturing quality control for welding, coating application and key structural areas.
5. Coordinating product manufacturing, quality verification and project delivery activities.
6. Providing a technical support basis for site installation and subsequent operation.

Engineering Value for Renewable Energy Grid Connection

This project demonstrates the application value of transformer plate radiators in ultra-high-altitude photovoltaic collection station infrastructure. The dedicated radiator arrangement, consideration of low-temperature operating conditions and C4-grade surface-protection approach provide component-level support for transformer cooling in a complex plateau environment.

• Dedicated plate radiator support for a 500kV photovoltaic collection station transformer.
• A configuration developed for high altitude, cold climate, strong UV exposure and substantial temperature variation.
• Enhanced exterior protection through a 200 μm B05 coating system.
• Support for transformer cooling-component requirements within concentrated renewable energy grid-connection applications.
• Reference value for radiator selection and surface-protection planning in plateau transmission, renewable energy collection and demanding outdoor projects.

Project Support Capability

Jiangsu Tengqi Electric Power Technology Co., Ltd. focuses on cooling technology for large oil-immersed transformers and reactors, intelligent manufacturing of plate radiators, and related lifecycle services. As a transformer radiator manufacturer and cooling solution provider, TengQi Technology supports project requirements through technical consultation, product selection, design and development, sample development, customised manufacturing, quality verification, batch supply, global delivery and after-sales technical support.

For high-altitude, cold-climate, corrosion-sensitive or other demanding applications, radiator structure, materials, coating systems, performance requirements, verification scope and delivery conditions should be determined according to the local environment, equipment specification and project documents confirmed by the relevant parties.