The world's first UHV large capacity field assembly transformer was successfully developed

From Baoding Tianwei Baobian Electric Co., Ltd., on June 30th, the world's first single-phase AC UHV large-capacity field-assembled transformer with complete independent intellectual property rights and core technology was developed by the company. Tianwei Baobian (Qinhuangdao) Transformer Co., Ltd. successfully passed all the test items and the main technical performance indicators reached the international leading level.

The successful development of this product is a breakthrough in the development of 1500MVA/1000kV transformers in China. It once again fills the gap in the development of UHV transformers in the world, marking that Tianwei Baobian has occupied the highest technical peak in the world's transformer industry.

The application of 1500MVA/1000kV UHV AC transformer can significantly improve the economy of UHV substation and form a better match with UHV line transmission capacity, which has broad application prospects. Due to its large capacity, large volume, overall nitrogen transport weight of about 470-490 tons and current limited transportation conditions, transportation problems have become an urgent problem to be solved in the application of 1500MVA/1000kV UHV AC transformers. In order to enable the product to be applied to any UHV substation possible in China, State Grid Corporation listed the “UHV high-capacity transformer research for convenient transportation” as a key scientific research project, and entrusted Tianwei Baobian to carry out research.

In the research and development process of this scientific product, Tianwei Baobian adopts advanced design technology. The product adopts modular design, the transformer can realize disintegration transportation, and has the advantages of compact body, small transportation weight and low transportation cost. The need for UHV construction in restricted areas of transportation. Using the most advanced three-dimensional magnetic field calculation software, the leakage magnetic flux and eddy current loss distribution in the transformer coil and the iron core and fuel tank steel structural parts are analyzed and calculated in detail. The advanced electric field calculation software is used to calculate the main longitudinal insulation of the transformer. The analysis has mastered the main longitudinal insulation arrangement of the UHV large-capacity transformer and the control of the leakage magnetic flux distribution of the coil, so that the product has the advantages of small loss, low noise, small volume, strong short-circuit resistance, no local overheating, etc., which can ensure long-term safety of the product. Stable operation.

In the process of product manufacturing, in order to ensure high-quality products and timely delivery, all employees of Tianwei Qinchang quickly acted. The company's leaders attached great importance to it and carefully deployed. The production department formulated a scientific and reasonable, rigorous and feasible production plan, and arranged the venue reasonably. Equipment, tooling, and refine the plan to each process, each node. The non-production department fully cooperates to provide logistical support. Before the start of the product, the first-line team will conduct pre-natal training, digest and absorb the essentials of the products to ensure the smooth production of the products. During the manufacturing process, the employees are fully engaged in the production and manufacture of the products, strictly in accordance with the process requirements, and control. Every quality control point, strive for excellence, work together to create a boutique.

The successful development of this product has filled the domestic technical gap. After the application of this research, it can meet the urgent needs of the national UHV transmission project construction, greatly improving the technical level and manufacturing capacity of Tianwei Baobian UHV transformer products.