Recently, CEEG’s independently developed YSFSZ-70000 kVA multi-purpose test transformer has successfully completed manufacturing and officially rolled off the production line, marking a new technological breakthrough in the field of high-voltage testing equipment. The successful development of this product highlights CEEG’s continuous innovation and technical strength in the field of special-purpose transformers, and provides more reliable and efficient testing solutions for power equipment testing.
一、Keeping Pace with Industry Trends to Meet Diverse Testing Requirements
As power systems evolve toward higher voltage levels and more complex operating environments, insulation performance verification for electrical equipment is facing new challenges. The rapid development of emerging sectors—such as offshore wind power, flexible HVDC transmission, and energy storage systems—has further drives the demand for high-voltage, large-capacity test transformers. By closely tracking industry trends, CEEG has successfully developed the YSFSZ-70000 kVA test transformer, providing precise and reliable insulation performance testing for a wide range of power equipment.
二、Seven Major Innovations Demonstrating Strong Technical Capabilities
Focusing on key industry technical challenges and high-end market demands, the product achieves breakthrough innovations across four core dimensions—structural optimization, core technology application, manufacturing process upgrades, and testing methodology innovation. These advances establish a strong competitive edge that integrates reliability, adaptability, and multi-purpose functionality. The key innovations are as follows:
(一) Optimization and Innovation of the Transformer Body Structure System
A special body structure configuration is adopted, featuring medium-voltage (compensation), high-voltage (dual-section), and tap-regulating (dual-section). Through precise matching and coordinated optimization of key performance parameters, this design overcomes the limitations of conventional structures, enabling flexible adaptation to multiple application scenarios and operating conditions, and significantly expanding the product’s application range.
(二) Upgraded and Iterative Insulation System Design
The high-voltage winding structure has been optimized using a continuous configuration of high-performance self-bonding transposed conductors, combined with a customized high-temperature-resistant composite insulation system. This design meets the requirements for low loss, high current, and wide operating conditions, providing a robust foundation for long-term safe operation.
(三) Breakthrough Innovation in Core Manufacturing Process Layout
An innovative three-way component design is introduced to optimize the connection between the high-voltage bushing and switching device, fundamentally addressing overheating and resistance imbalance issues commonly found in traditional connections under high-current conditions. This approach significantly improves assembly efficiency and connection reliability, advancing manufacturing processes toward greater efficiency and precision.
(四) Overall Layout with Integrated Aesthetic Design
A high-efficiency combination scheme of fine and coarse tap-changing switches across three phases is employed, alongside optimized structural and appearance design of the non-standard oil tank. While achieving a more compact overall structure, this innovation further improves three-phase DC resistance balance and operational safety, realizing an organic integration of product performance, manufacturing quality, and aesthetic appearance.
(五) Innovation in Customized System Solutions
By gaining deep insight into customer requirements and application-specific challenges, a multi-round technical iteration and validation mechanism has been established. Customized needs are accurately transformed into standardized and modular system solutions, enabling efficient alignment between requirements and technology, and comprehensively enhancing customer experience and value return.
(六) Upgraded and Innovative Testing & Verification System
Based on national standards and IEC requirements, and tailored to the product’s special application scenarios, a dedicated withstand voltage and temperature rise testing and validation system has been developed. By optimizing testing procedures and evaluation criteria, this system ensures that all performance indicators meet high-end application requirements, achieving a comprehensive enhancement of product safety and reliability.
三、Continuous Technological Innovation: Intelligent Manufacturing Leading the Future
CEEG will continue to uphold its core values of Vision, Innovation, and Responsibility, driving the development of test transformers toward higher voltage levels, greater capacity, and enhanced intelligence. By integrating digital technologies such as intelligent monitoring and fault early-warning systems, CEEG is committed to delivering higher-quality, more reliable power solutions for its customers.