Winding connection structure for double-active-part on-load-tap-changing auto-transformer

Abstract

The invention relates to a winding connection structure for a double-active-part on-load-tap-changing auto-transformer, and belongs to the technical field of transformer manufacture. The technical scheme is that: the winding connection structure comprises a series winding (HV), a public winding (LV2) and a switching winding (LV1), and can be connected with two voltage classes of grids in order to realize low voltage; the switching winding (LV1) is arranged between the series winding (HV) and the public winding (LV2); and a no-load switch controls the switching winding (LV1) to be connected in series with the series winding (HV) or the public winding (LV2), namely the number of turns of the public winding can be controlled to greatly change, so that the low voltage is greatly changed in the two voltage classes of grids. The invention provides the winding connection structure for the auto-transformer, the high voltage adopts off-circuit tap-changing, and the low voltage can be switched on the two voltage classes of grids and also can respectively perform on-load tap-changing under different voltages. The transformer adopting the structure can be used among three voltage classes of grids, but is only responsible for a high voltage grid therein to respectively perform power-flow contact between two low voltage grids. A brand-new double-active-part structural design is adopted so as to effectively solve the problem of overlarge voltage deviation caused by a set of shared regulating winding when the low voltage is connected to different voltage classes of grids.

Description

Technical field: [0001] The invention relates to a winding connection structure of a dual-body self-coupling 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. Invention content: [0003] The object of the present invention is to provide a winding connection structure of a dual-body self-coupling on-load tap changer, which adopts a double-body structure design to solve the above-mentioned problems in the background technology. [0004] The technical scheme of the present invention is: [0005] The winding w...

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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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