Low-voltage dual-voltage on-load-tap-changing auto-transformer
A voltage regulating transformer and dual voltage technology, which is applied in the field of transformer manufacturing, can solve the problems of large voltage deviation and achieve the effect of small tap voltage error
Active Publication Date: 2011-06-15
BAODING TIANWEI BAOBIAN ELECTRICAL
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Problems solved by technology
[0002] The high voltage of the autotransformer is non-excitation voltage regulation, and the low voltage can be switched on the power grid of two voltage levels, and the low voltage can also perform on-load voltage regulation at different voltages. The current problem is: low voltage at different voltages The voltage deviation is too large when sharing a set of voltage regulating windings
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[0017] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.
[0018] In the embodiment, the self-coupling, low-voltage dual-voltage on-load tap changer includes a constant flux body 1 (main body) and a flux changing body 2 (auxiliary body); the constant flux body has a balance winding PV , public winding LV2, voltage regulating winding TV, switching winding LV1, series winding HV; the flux transformer has compensation winding LV3 and excitation winding EV. The iron cores of the two bodies are three-phase three-column structures, and the structure size of the constant flux body 1 is much larger than that of the flux changer body 2, so the flux changer body can be placed orthogonally in the constant flux the end of the body. Three single-phase on-load switches 10 are provided at the end of the transformer for low-voltage on-load voltage regulation. The high-voltage side of the transformer is provided with ...
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The invention discloses a low-voltage dual-voltage on-load-tap-changing auto-transformer, and belongs to the technical field of transformer manufacturing. The technical scheme is that: the low-voltage dual-voltage on-load-tap-changing auto-transformer comprises a constant flux active part (1) and a variable flux active part (2), wherein the constant flux active part comprises the following windings from a leg from inside to outside: a balance winding (3), a common winding (4), a regulating winding (5), a switching winding (6) and a series winding (7); the variable flux active part comprises the following windings from a leg from the inside to the outside: a compensating winding (8) and an exciting winding (9); and the electrical connection between the two active parts is that: the series winding (7) is in series connection with the common winding (4) to form an auto-coupled structure, and that whether the switching winding (6) is in series connection with the series winding or the common winding is decided by a switch (12), so that the low voltage is switched between different electric networks in different voltage levels. A structure of brand-new dual active parts and variable flux compensation and voltage regulation is adopted, so the low voltage windings under two voltage levels can share a set of regulating winding and an on-load switch, and each tapping voltage error is ensured to be small as possible. The low-voltage dual-voltage on-load-tap-changing auto-transformer adopts a brand-new structural design of double active parts, and effectively solves the problem that the voltage deviation is too large caused by sharing one set of regulating winding when the low voltage is connected with the electric networks in different voltage levels.
Description
technical field [0001] The invention relates to a self-coupling, low-voltage dual-voltage on-load voltage regulating transformer, which belongs to the technical field of transformer manufacturing. Background technique [0002] The high voltage of the autotransformer is non-excitation voltage regulation, and the low voltage can be switched on the power grid of two voltage levels, and the low voltage can also perform on-load voltage regulation at different voltages. The current problem is: low voltage at different voltages The voltage deviation is too large when sharing a set of voltage regulating windings. Contents of the invention [0003] The object of the present invention is to provide a self-coupling, low-voltage dual-voltage on-load tap-changing transformer, which adopts a double-body structure design to solve the above-mentioned problems in the background technology. [0004] Technical scheme of the present invention is: [0005] A self-coupling, low-voltage dual-v...
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IPC IPC(8): H01F29/04H01F27/28
Inventor 李程刘力强何丽颖张栋张元录刘东升
Owner BAODING TIANWEI BAOBIAN ELECTRICAL