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Equivalent oil change apparatus for transformer on-load tap changer and method for changing oil with electricity

A technology of voltage regulating switch and transformer oil, applied in transformer/inductor cooling, transformer, variable transformer, etc., can solve problems such as failure to consider, action of gas relay, abnormal oil level, etc.

Inactive Publication Date: 2020-02-07
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

For example, the Chinese invention patent "Transformer switch room live oil change device and its application method" (authorized announcement number: CN102226961B) applied by Jiangsu Nanjing Power Supply Company discloses in detail a live oil change device, which performs oil change by switching valves. It does not take into account that during the oil change process, due to the change of the liquid level of the oil in the transformer and the imbalance between the oil outlet and the oil inlet, the oil level will be abnormal and the gas relay will be activated.

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  • Equivalent oil change apparatus for transformer on-load tap changer and method for changing oil with electricity
  • Equivalent oil change apparatus for transformer on-load tap changer and method for changing oil with electricity

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[0029] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0031] In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, an...

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Abstract

The invention discloses an equivalent oil change apparatus for a transformer on-load tap changer and a method for changing oil with electricity. The equivalent oil change apparatus includes an oil inlet pipe and an oil outlet pipe separately connected to a transformer oil chamber, and a flowmeter and a hydraulic pump are separately connected to the oil inlet pipe and the oil outlet pipe. The oil inlet pipe is further provided with an ultrasonic degassing mechanism. In addition, a method for changing oil with electricity using the equivalent oil change apparatus is disclosed. A flow balance between oil in and out is controlled to achieve an objective of changing oil with electricity. By using the invention, the oil can be changed in an electricity state, and problems of an abnormal oil level, gas movement, and oil flow discharge caused by an oil change operation are eliminated.

Description

technical field [0001] The invention relates to the technical field of transformer equipment, in particular to a transformer on-load tap changer equivalent oil change device and a live oil change method thereof. Background technique [0002] At present, in the power system, by using the on-load tap changer to connect the power grid, stabilize the load center voltage, adjust the power flow distribution of the power grid, improve the operating conditions of electrical equipment and improve the quality of power supply voltage, and meet the needs of industrial and agricultural production, it has extensive advantages. It has been widely used in power systems in the past ten years. [0003] In the existing transformer on-load tap changer, the oil-immersed on-load split switch is mostly used, and the voltage ratio of the transformer is changed by adding or reducing turns in the primary or secondary winding of the transformer. It refers to the use of the on-load decomposition switc...

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Application Information

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IPC IPC(8): H01F27/14H01F29/04H01F41/00
CPCH01F27/14H01F29/04H01F41/00
Inventor 潘云张倩姜慧灵
Owner GUIZHOU POWER GRID CO LTD
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