CN210778163U - Live oil changing system for on-load voltage regulation switch of transformer - Google Patents

Live oil changing system for on-load voltage regulation switch of transformer Download PDF

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Publication number
CN210778163U
CN210778163U CN201921572475.2U CN201921572475U CN210778163U CN 210778163 U CN210778163 U CN 210778163U CN 201921572475 U CN201921572475 U CN 201921572475U CN 210778163 U CN210778163 U CN 210778163U
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China
Prior art keywords
oil
transformer
hydraulic pump
chamber
load tap
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CN201921572475.2U
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Chinese (zh)
Inventor
潘云
张倩
姜慧灵
余兴建
陈浩
肖浩宇
陶用伟
钱孝祥
黄浩
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Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
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Abstract

The utility model discloses a transformer on-load tap changer live oil change system, which comprises a transformer oil chamber, an on-load split switch soaked in the transformer oil chamber, an oil filter communicated with the oil chamber, and a synchronous equivalent controller arranged between the oil filter and the oil chamber; the synchronous equivalent controller comprises an oil inlet pipeline and an oil outlet pipeline which are respectively connected to an oil chamber, and a flowmeter and a hydraulic pump are respectively connected to the oil inlet pipeline and the oil outlet pipeline. Adopt the utility model discloses a set up the control and advance the oil flow velocity, eliminate bubble in the oil, make it can change oil in the electrified state to stop because of the oil level that the operation of changing oil appears is unusual, the pressure regulating gas action, the problem that the oil stream discharges appears.

Description

Live oil changing system for on-load voltage regulation switch of transformer
Technical Field
The utility model relates to a transformer equipment technical field particularly, relates to a transformer on-load tap changer electrified system of changing oil.
Background
At present, in a power system, an on-load tap changer is used for connecting a power grid, so that the load center voltage is stabilized, the power flow distribution of the power grid is adjusted, the operation condition of electrical equipment is improved, the power supply voltage quality is improved, the industrial and agricultural production requirements are met, the advantages are wide, and the on-load tap changer is widely applied to the power system in nearly ten years.
In the existing on-load tap changer of the transformer, an oil-immersed on-load tap changer is mostly adopted, and the change of the voltage ratio of the transformer is realized by adding or subtracting turns of a primary winding or a secondary winding of the transformer.
Because the on-load tap changer frequently achieves the purpose of regulating voltage through the switching of the moving contact and the static contact in the operation, and the oil quality is continuously degraded along with the increase of the voltage regulating times, the oil of the on-load tap changer needs to be replaced according to the requirement that the voltage regulation of the tap changer reaches certain times or the oil is degraded to a certain degree, and the oil change of the on-load tap changer of the traditional transformer can only be carried out in the power failure state of the transformer in order to prevent the abnormal oil level, the gas pressure regulation action and the oil flow discharge of the on-load tap changer in the oil change of the on.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a transformer on-load tap changer electrified system of changing oil, through setting up bubble in the control oil flow rate, the oil of advancing, make it can change oil in the electrified state to stop because of the oil level that the operation of changing oil appears is unusual, pressure regulating gas moves, the problem that the oil stream discharges appears.
In order to achieve the technical purpose, the utility model discloses a technical scheme specifically as follows:
an on-load tap-changer live oil changing system of a transformer comprises an oil chamber of the transformer, an on-load tap-changer soaked in the oil chamber of the transformer and an oil filter communicated with the oil chamber, wherein a synchronous equivalent controller is arranged between the oil filter and the oil chamber; the synchronous equivalent controller comprises an oil inlet pipeline and an oil outlet pipeline which are respectively connected to an oil chamber, and a flowmeter and a hydraulic pump are respectively connected to the oil inlet pipeline and the oil outlet pipeline.
Further, oil inlet pipeline one end is connected to the oil filter export, and oil inlet pipeline's the other end is connected to in the oil chamber.
Further, the oil filter inlet is connected to an external oil source.
Furthermore, an oil inlet hydraulic pump is arranged on the oil inlet pipeline, and a flowmeter is arranged between the oil inlet hydraulic pump and the oil chamber.
Furthermore, one end of the oil outlet pipeline is connected with a recovery box, and the other end of the oil outlet pipeline is connected into the oil chamber.
Furthermore, an oil pumping hydraulic pump is arranged on the oil outlet pipeline, and a flow meter is arranged between the oil pumping hydraulic pump and the recovery tank.
Furthermore, the oil inlet hydraulic pump and the oil pumping hydraulic pump are respectively connected with a servo motor for controlling the discharge capacity.
Furthermore, an oil conservator and a gas relay are arranged at the top of the oil chamber.
The beneficial effects of the utility model reside in that: the utility model is different from the prior art, the utility model discloses can be according to the reading of the instantaneous flowmeter of the collection of oil feed oil circuit and the flowmeter signal on the oil extraction oil circuit carry out the comparison, come the servo motor on the drive oil extraction oil circuit to improve or reduce the rotational speed and keep the unity of oil feed and oil extraction in-process oil mass, if the accumulative total flow of oil feed and oil extraction is greater than the setting value after at this in-process, the liquid level that divides in the switch oil chamber among the priority base oil line drives oil feed and oil extraction servo motor and comes more accurate control according to this judgement result.
Drawings
Fig. 1 is a schematic overall structure of an electrified oil change system of a transformer on-load tap changer;
fig. 2 is a schematic structural diagram of a synchronous equivalent controller of an on-load tap changer live oil change system of a transformer provided by the utility model;
reference numerals:
1. a first servo motor; 2. an oil inlet hydraulic pump; 3. a first flow meter; 4. an oil chamber; 5. an oil pumping hydraulic pump; 6. a second servo motor; 7. a second flow meter; 8. an oil filter; 9. a synchronous equivalent controller; 10. a recycling bin; 11. an oil inlet pipeline; 12. an oil outlet pipeline; 13. a transformer; 14. an oil conservator; 15. a gas relay.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
Fig. 1-2 show an on-load tap changer live oil change system of a transformer, wherein a transformer 13 comprises an oil chamber 4 and an on-load tap changer soaked in the oil chamber 4; an oil conservator 14 and a gas relay 15 are arranged at the top of the oil chamber 4.
The electrified oil changing device also comprises an oil filter 8 communicated with the oil chamber 4, and the inlet of the oil filter 8 is connected to an external oil source.
A synchronous equivalent controller 9 is arranged between the oil filter 8 and the oil chamber 4; the synchronous equivalent controller 9 comprises an oil inlet pipeline 11 and an oil outlet pipeline 12 which are respectively connected to the oil chamber 4, and a flowmeter and a hydraulic pump are respectively connected to the oil inlet pipeline 11 and the oil outlet pipeline 12.
One end of the oil inlet pipeline 11 is connected to the outlet of the oil filter 8, and the other end of the oil inlet pipeline 11 is connected into the oil chamber 4. The oil inlet pipeline 11 is provided with an oil inlet hydraulic pump 2, and a first flow meter 3 is arranged between the oil inlet hydraulic pump 2 and the oil chamber 4. The oil inlet hydraulic pump 2 is connected with a first servo motor 1 for controlling the displacement of the oil inlet hydraulic pump 2.
One end of the oil outlet pipeline 12 is connected with the recovery tank 10, and the other end is connected into the oil chamber 4. The oil outlet pipeline 12 is provided with an oil pumping hydraulic pump 5, and a second flow meter 7 is arranged between the oil pumping hydraulic pump 5 and the recovery tank 10. The oil pumping hydraulic pump 5 is connected with a second servo motor 6 for controlling the displacement of the oil pumping hydraulic pump 5.
In practical use, an industrial common PLC (programmable logic controller) can be used as a servo controller, a needed oil inlet flow parameter is set through a PLC system, a first flowmeter 3 signal is collected and fed back to the PLC system in an oil inlet process of equipment, the system drives an oil inlet hydraulic pump 2 to increase or reduce the displacement by increasing or reducing the rotating speed of a servo motor after comparing and analyzing a feedback result and a set flow, and how to set the PLC is the general skill of a person skilled in the art, which is not repeated here. And similarly, acquiring a signal of the second flow meter 7 for controlling the displacement of the oil pumping hydraulic pump 5.
In the oil changing process, a first servo motor 1 for feeding oil and a second servo motor 6 for discharging oil are started simultaneously, a qualified oil source is input into an inlet of an oil filter 8, and the qualified oil source supplies oil to an oil chamber 4 of a transformer 13 through an oil feeding hydraulic pump 2; the oil in the oil chamber 4 of the original transformer 13 is discharged to the recovery tank 10 through the oil pumping hydraulic pump 5.
According to the reading signal of the instantaneous flowmeter collected by the first flowmeter 3 on the oil inlet pipeline 11, the reading signal of the instantaneous flowmeter collected by the second flowmeter 7 on the oil outlet pipeline 12 is compared. The servo motor on the oil inlet pipeline 11 or the oil outlet pipeline 12 is driven to increase or decrease the rotating speed so as to keep the oil quantity in the oil inlet and outlet processes uniform. In the process, if one of the accumulated flow rates of the oil inlet and the oil outlet is larger than a set value, the set value is related to the size of the oil chamber 4 of the transformer 13, and the oil inlet and the oil outlet servo motors are preferentially driven according to the judgment result, so that the liquid level of the oil chamber 4 of the transformer 13 is more accurately controlled not to change in the oil changing process.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a transformer on-load tap-changer live-wire oil change system, includes grease chamber (4) of transformer (13), soaks the on-load tap-changer in grease chamber (4) of transformer (13), its characterized in that: the oil filter is characterized by also comprising an oil filter (8) communicated with the oil chamber (4), and a synchronous equivalent controller (9) is arranged between the oil filter (8) and the oil chamber (4); the synchronous equivalent controller (9) comprises an oil inlet pipeline (11) and an oil outlet pipeline (12) which are respectively connected to the oil chamber (4), and the oil inlet pipeline (11) and the oil outlet pipeline (12) are respectively connected with a flowmeter and a hydraulic pump.
2. The live oil change system of the on-load tap changer of the transformer according to claim 1, characterized in that: one end of the oil inlet pipeline (11) is connected to the outlet of the oil filter (8), and the other end of the oil inlet pipeline (11) is connected into the oil chamber (4).
3. The live oil change system of the on-load tap changer of the transformer according to claim 2, characterized in that: the inlet of the oil filter (8) is connected to an external oil source.
4. The live oil change system of the on-load tap changer of the transformer according to any one of claims 1-2, characterized in that: the oil inlet pipeline (11) is provided with an oil inlet hydraulic pump (2), and a flowmeter is arranged between the oil inlet hydraulic pump (2) and the oil chamber (4).
5. The live oil change system of the on-load tap changer of the transformer according to claim 4, characterized in that: the oil inlet hydraulic pump (2) is connected with a servo motor for controlling the displacement of the oil inlet hydraulic pump (2).
6. The live oil change system of the on-load tap changer of the transformer according to claim 1, characterized in that: one end of the oil outlet pipeline (12) is connected with a recovery tank (10), and the other end is connected into the oil chamber (4).
7. The live oil change system of the on-load tap changer of the transformer according to any one of claims 1 or 6, wherein: the oil outlet pipeline (12) is provided with an oil pumping hydraulic pump (5), and a flowmeter is arranged between the oil pumping hydraulic pump (5) and the recovery tank (10).
8. The live oil change system of the on-load tap changer of the transformer of claim 7, characterized in that: the oil pumping hydraulic pump (5) is connected with a servo motor for controlling the displacement of the oil pumping hydraulic pump (5).
9. The live oil change system of the on-load tap changer of the transformer according to claim 1, characterized in that: the top of the oil chamber (4) is provided with an oil conservator (14) and a gas relay (15).
CN201921572475.2U 2019-09-20 2019-09-20 Live oil changing system for on-load voltage regulation switch of transformer Active CN210778163U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921572475.2U CN210778163U (en) 2019-09-20 2019-09-20 Live oil changing system for on-load voltage regulation switch of transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921572475.2U CN210778163U (en) 2019-09-20 2019-09-20 Live oil changing system for on-load voltage regulation switch of transformer

Publications (1)

Publication Number Publication Date
CN210778163U true CN210778163U (en) 2020-06-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921572475.2U Active CN210778163U (en) 2019-09-20 2019-09-20 Live oil changing system for on-load voltage regulation switch of transformer

Country Status (1)

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CN (1) CN210778163U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113274803A (en) * 2021-05-31 2021-08-20 广东电网有限责任公司 Oil filtering system and method based on transformer on-load switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113274803A (en) * 2021-05-31 2021-08-20 广东电网有限责任公司 Oil filtering system and method based on transformer on-load switch

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