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A method for on-site assembly of UHV converter transformers

A converter transformer and on-site assembly technology, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of large capacity, high voltage level of 10,000MW UHV DC projects, and reduce the difficulty of selection and design and the effect of manufacturing difficulty

Active Publication Date: 2018-07-20
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The ±800kV, 10000MW UHV DC project has high voltage level and large capacity, and there is no precedent or experience in the world for reference

Method used

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  • A method for on-site assembly of UHV converter transformers
  • A method for on-site assembly of UHV converter transformers
  • A method for on-site assembly of UHV converter transformers

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Embodiment Construction

[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] The basic principles of on-site assembly of a UHV converter transformer on-site assembly method provided by the present invention include: (1) minimizing the number of disassembled parts; (2) maintaining the integrity of the transformer to the greatest extent; (3) shortening the The exposure time in the air; (4) reduce the on-site installation process and workload; (5) take into account the reduction of the difficulty of the on-site test.

[0040] The present invention provides four schemes for the on-site assembly method of the UHV converter transformer. The first option is that the UHV converter body is transported in a temporary oil tank with a small size. Option two is that the two bodies are in the same fuel tank. The third option is that core stacking, body assembly and almost all key production steps and ...

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Abstract

The invention relates to an ultra-high voltage converter transformer field assembling method. According to the method, four schemes are proposed as follows: first, the ultra-high voltage converter transformer body is conveyed by adopting a temporary oil tank with a relatively small external dimension; second, dual transformer bodies share the same oil tank; third, overlapping of iron cores, final assembly of the transformer body and almost all key production steps and key processes are all completed in a field temporary production workshop; and four, two transformers with relatively low capacities are connected in series and in parallel on the external for realizing connection and performing overall operation. According to the ultra-high voltage converter transformer field assembling method, the assembling scheme for the converter transformer satisfies the requirements of reducing the field workload to the maximum degree, reducing risks caused by field assembly and field tests, and lowering cost on the basis of meeting transport conditions.

Description

technical field [0001] The invention relates to the field of ultra-high voltage direct current transmission, in particular to an on-site assembly method of an ultra-high voltage converter transformer. Background technique [0002] At present, UHV DC transmission has become an important way for long-distance large-capacity transmission, and several ±800kV UHV DC transmission projects are in the implementation stage. The research on ±1100 kV UHV DC transmission technology is also maturing. With the improvement of the transmission power and voltage level of UHVDC transmission projects, the capacity of a single converter transformer continues to increase. The western part of China is dominated by mountainous areas with complex terrain, and the transportation conditions are greatly restricted. The transportation problem of converter transformers is becoming more and more serious. The main difficulty in the transportation of UHV converter transformers lies in the overweight and ...

Claims

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Application Information

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IPC IPC(8): H01F41/00
Inventor 刘云李光范
Owner STATE GRID CORP OF CHINA
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