一种干式变压器高压线圈和有载调压干式变压器结构
By solving the technical problems of the high-voltage coil of dry-type transformers, the technical problems of the high-voltage coil of existing dry-type transformers were solved. By solving the technical problems of the coil, by separating the first and last ends of the coil to the two sides, and by setting the on-load tap changer and the high-voltage output terminal separately, the cable interference and operation inconvenience caused by the coil tap terminals and the first and last ends being on the same side were solved, the safety risks were reduced and the space utilization was optimized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG MINGYANG ELECTRIC CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing high-voltage coil structure of dry-type transformers, the coil tap terminals and the beginning and end terminals are located on the same side, which leads to problems such as cable interference, inconvenient operation, high safety risks, high costs, and large space occupation.
Design a high-voltage coil for a dry-type transformer. The coil's start and end ends are placed on opposite sides of the high-voltage coil tap, and the coil tap ends are placed on opposite sides of the coil tap terminals. The on-load tap changer is also placed on opposite sides of the high-voltage output terminal. A multi-layer integer-turn coil and half-turn coil structure is adopted. The high-voltage cable is directly connected to the high-voltage output terminal, and the tap changer is fixed on the base.
It reduces the risk of high-voltage breakdown discharge caused by insulation damage, reduces the risk of damage caused by improper operation, lowers costs, optimizes the operating space, and improves construction efficiency.
Smart Images
Figure CN224519653U_ABST
Abstract
Claims
1. A dry-type transformer high-voltage coil, characterized by, The high-voltage coil of the dry-type transformer includes a common coil and a tap-regulating coil. The common coil is connected to the beginning of the coil, and the tap-regulating coil is connected to the end of the coil. The high-voltage coil of the dry-type transformer is provided with multiple first taps, including a common tap and multiple tap-regulating terminals. The common tap is led out from the common coil, and the tap-regulating terminals are led out from the tap-regulating coil. The common voltage regulating terminal is connected to each of the tap voltage regulating terminals to form a voltage regulating position; Both the first end and the last end of the coil are located on the first side; Multiple first taps are all located on the second side opposite to the first side.
2. Dry-type transformer high voltage coil according to claim 1, characterized in that Both the common coil and the tap-adjusting coil include a multi-layer integer-turn coil and a half-turn coil.
3. Dry-type transformer high voltage coil according to claim 2, characterized in that The number of coil turns between the first end of the coil and the common voltage regulating end is half a turn less than the preset design number of turns, and the number of coil turns between the tail end of the coil and the tap voltage regulating end adjacent to the tail end of the coil is half a turn more than the design number of turns.
4. The dry-type transformer high voltage coil of claim 1, wherein, The number of tap adjustment terminals is set to 9.
5. Dry-type transformer high voltage coil according to claim 4, characterized in that The voltage regulation range of the high-voltage coil of the dry-type transformer is ±4×2.5%.
6. A structure of a dry-type voltage regulating transformer, characterized by comprising: The on-load tap-changing dry-type transformer structure includes a dry-type transformer and an on-load tap-changing switch, wherein the high-voltage coil on the dry-type transformer is the high-voltage coil of the dry-type transformer as described in claims 1-4. The dry-type transformer has a high-voltage output terminal, which is located on the first side and is connected to the first end of the coil via a first cable. The on-load tap changer is located on the second side. The on-load tap changer is provided with a second tap that corresponds to and matches the first tap. The first tap is connected to the corresponding second tap via a second cable.
7. The structure of the on-load voltage regulating dry-type transformer according to claim 6, wherein Both the dry-type transformer and the on-load tap changer are fixed on the base, and cooling fans are also installed on both sides of the dry-type transformer on the base.
8. The structure of the on-load voltage regulating dry-type transformer according to claim 6, wherein The dry-type transformer is a three-phase transformer, and the high-voltage coils of each phase of the three-phase transformer are connected in a delta configuration. In the delta connection, the first end of the first phase high-voltage coil is connected to the last end of the third phase high-voltage coil via a connecting copper tube, the first end of the second phase high-voltage coil is connected to the last end of the first phase high-voltage coil via the connecting copper tube, and the first end of the third phase high-voltage coil is connected to the last end of the second phase high-voltage coil via the connecting copper tube.
9. The structure of the dry-type voltage regulating transformer according to claim 6, wherein The first cable is a high-voltage cable; and / or, the second cable is a low-voltage cable.
10. The structure of the dry-type voltage regulating transformer according to claim 6, wherein The dry-type transformer also has a low-voltage copper busbar leading out, which is located on the second side.