Constant-magnetic-flux wide-voltage-regulating-range intermediate transformer for test
A technology of transformer and wide voltage regulation, applied in the field of intermediate transformers for testing, can solve the problems of inability to meet test requirements, small voltage regulation range, and large variation range, and achieve the effect of meeting electrical test needs and large voltage regulation range.
Inactive Publication Date: 2015-12-23
ZHEJIANG JIANGSHAN TRANSFORMER CO LTD
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Problems solved by technology
[0002] The voltage and current of the test power supply required for electrical tests of various power transmission and transformation equipment, including transformers, reactors, transformers, etc., are different, and some of them have a relatively large range of variation. Only relying on generator sets or voltage regulators cannot meet the test requirements.
The current test intermediate transformer has a small voltage regulation range, usually only ±5%, and the voltage regulation range is small, resulting in the problem that it cannot meet the test requirements.
Method used
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Embodiment Construction
[0048] The technical parameters of the three-phase transformer in this embodiment are:
[0049]
[0050]
[0051] Such as Figure 1-Figure 20 As shown, a test intermediate transformer with constant magnetic flux and wide voltage regulation range includes a transformer oil tank 13 and a voltage regulating switch 11. The oil tank 13 is provided with a transformer body, and the transformer body is located in a transformer oil tank filled with transformer oil 12. The transformer body includes an iron core, a three-phase inner coil 2 and a three-phase outer coil 1. The iron core column of the iron core is provided with the above-mentioned inner coil 2 and outer coil 1 corresponding to each other from the inside to the outside. An insulating layer is provided between the outer walls of the iron core columns of the iron core, and an insulating layer is provided between the outer wall of the inner coil 2 and the inner wall of the outer coil 1. The first ends of the three-phase o...
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A constant-magnetic-flux wide-voltage-regulating-range intermediate transformer for a test comprises three-phase inner coils (2) and three-phase outer coils (1), the three-phase inner coils (2) are of a triangular connection structure, and the tail ends of the three-phase outer coils (1) are connected to form a star-shaped connection structure of the three-phase outer coils (1). Each outer coil is composed of a winding (1-1), a winding (1-2), a winding (1-3), a winding (1-4) and a winding (1-5), wherein the winding (1-1) and the winding (1-2) are independent windings; the winding (1-3), the winding (1-4) and the winding (1-5) are dependent windings which are identical in structure and axially distributed and form an independent winding in different serial connection or parallel connection modes; the winding (1-1), the winding (1-2), the winding (1-3), the winding (1-4) and the winding (1-5) form an output winding and output different voltages and currents by switching different combinations through a voltage-regulating switch, and the output capacity keeps unchanged. The voltage regulating range is large, and requirements of electric tests under different test conditions can be met.
Description
technical field [0001] The invention belongs to the technical field of transformers, and relates to an intermediate transformer for testing, in particular to an intermediate transformer for testing with constant magnetic flux and wide voltage regulation range. Background technique [0002] The voltage and current of the test power supply required for electrical tests of various power transmission and transformation equipment, including transformers, reactors, transformers, etc., are different, and some of them have a relatively large range of variation. Only relying on generator sets or voltage regulators cannot meet the test requirements. . The voltage regulation range of the current test intermediate transformer is small, usually only ±5%, and the voltage regulation range is small, which causes the problem that it cannot meet the test requirements. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentio...
Claims
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IPC IPC(8): H01F29/02H01F27/28H01H19/08H01H19/10H01F38/00G01R31/00
CPCG01R31/00H01F27/2828H01F29/02
Inventor 姜振军
Owner ZHEJIANG JIANGSHAN TRANSFORMER CO LTD