KR20130071622A - Insulating oil filtering apparatus for on load tap changer - Google Patents
Insulating oil filtering apparatus for on load tap changer Download PDFInfo
- Publication number
- KR20130071622A KR20130071622A KR1020110138929A KR20110138929A KR20130071622A KR 20130071622 A KR20130071622 A KR 20130071622A KR 1020110138929 A KR1020110138929 A KR 1020110138929A KR 20110138929 A KR20110138929 A KR 20110138929A KR 20130071622 A KR20130071622 A KR 20130071622A
- Authority
- KR
- South Korea
- Prior art keywords
- oil
- housing
- insulating oil
- filter device
- insulating
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
The present invention relates to an insulating oil filter device for a tap-changing part, and more particularly, to an insulating oil filter device for a tap-changing part that filters bubbles and foreign substances mixed in the insulating oil used in the tap-changing part.
In the transformer, an on load tap changer is used. Since the insulating oil is contaminated by an arc generated during the tap switching, the filter is filtered using an insulating oil filter device. To this end, after the tap-changing operation is completed, the pump of the insulating oil filter device operates to suck the contaminated insulating oil in the tap-changing part into the inside of the filter device through the oil suction pipe, filter the contaminants through the filter, and then discharge the oil discharge pipe. Send it back through the tap-changer.
In the tap-changer system, when an accident occurs inside, the flow velocity is generated toward the conservator. At this time, a protective relay installed between the conservator and the tap-changer is operated to report the tap-changer. However, even when there is no accident in the tap-changer system, a flow rate occurs toward the conservator and frequently causes a malfunction in which the protective relay operates. This is caused by bubble accumulation inside the insulating oil filter device and blockage of the piping.
In addition, bubbles are generated by the arc at the time of tap switching, and a part of the bubbles are introduced into the filter device through the oil suction pipe when the insulating oil filter device is operated. Some of these bubbles flow out through the oil discharge pipe, but some are accumulated in the insulating oil filter device by the dense filter.
Therefore, as the number of tap change times increases, the amount of pollutants filtered by the filter device increases, so that the performance of the filter device decreases, and at the same time, the amount of bubbles accumulated therein also increases. In this case, since the pressure inside the filter device for circulation of the insulating oil increases, a bubble layer compressed at high pressure is formed inside the filter device.
At this time, when the oil discharge pipe is temporarily blocked during the operation of the filter device and a part of the filter which is blocked at the time of opening occurs, the compressed air is expanded while the pressure inside the oil filter drum drops. Due to such bubble expansion, excessive flow velocity occurs in the oil discharge pipe, causing the protection relay to malfunction.
In addition, even when the oil suction pipe is temporarily blocked by the foreign matter during the operation of the filter device, there is a problem that the insulating oil flowing into the oil discharge pipe flows toward the conservator and affects the flow rate change of the protective relay side.
Accordingly, an object of the present invention is to solve the conventional problems as described above, to prevent the bubbles from being compressed inside the housing of the filter device to prevent the malfunction of the protective relay due to the compression and expansion of the bubbles.
Another object of the present invention is to install an oil pump inside the filter so that the insulating oil filtered through the foreign matter and bubbles pass through the oil pump.
Still another object of the present invention is to minimize the intake of foreign matter through the oil suction pipe into the housing of the filter device.
According to a feature of the present invention for achieving the above object, the present invention provides a housing having an inner space in which the insulating oil is filled and a filter for filtering foreign substances of the insulating oil is installed, and supplying the insulating oil to the interior of the housing An oil suction pipe, an oil discharge pipe for discharging the insulating oil from the housing, and the oil pump is installed in the inner space of the housing to press the insulating oil in the inner space directly to the oil discharge pipe.
The oil pump is installed inside the filter.
The inlet of the oil suction pipe is installed in the tab switching unit, and the inlet is provided with a plurality of suction holes, and a strainer is provided to surround the inlet of the suction hole.
The mesh of the strain net has a diameter smaller than the diameter of the inlet of the oil suction pipe.
The oil suction pipe is connected to the lower gravity direction of the housing, the oil discharge pipe is connected to the upper gravity direction of the housing.
The housing has a bubble confirmation window for confirming the bubbles of the inner space, the upper portion of the housing is provided with a bubble exhaust valve for discharging the bubbles of the inner space to the outside.
In the insulating oil filter device for tap switching parts according to the present invention, the following effects can be obtained.
First, in the present invention, since the oil pump installed inside the housing of the filter device is installed adjacent to the oil discharge pipe, the air bubbles inside the housing are not compressed by the pressure generated by the oil pump, and thus the pressure change of the air bubbles inside the housing is prevented. There is an effect that can prevent the malfunction of the protective relay by the.
In the present invention, since the filter is provided so as to surround the oil pump installed adjacent to the oil discharge pipe in the filter device, the air bubbles and foreign matters are blocked by the filter and the air bubbles are positioned around the filter, so that the outside There is also an effect that makes it easier to check the amount of bubbles in the discharge.
In addition, in the present invention, a plurality of holes are formed in the inlet of the oil supply pipe for transferring the insulating oil to the housing of the filter device, and the foreign matter generated in the tap-changing part is enclosed by the filter net through the oil supply pipe. There is also an effect to prevent the malfunction of the protective relay by reducing the problem that the inlet is blocked at once by the coarse foreign matter that can block the pipe at a time to reduce the transmission to the inside.
1 is a schematic cross-sectional view showing the configuration of an insulating oil filter device for a tap-changing part according to the present invention.
Figure 2 is a block diagram showing the configuration of a tap-change system is used filter device according to the present invention.
Figure 3 is a schematic cross-sectional view showing the configuration of the inlet portion of the oil suction pipe employed in the filter device according to the present invention.
4 is an explanatory view showing that the tap-changer system employing the filter device according to the present invention is operated.
Hereinafter, a preferred embodiment of the insulating oil filter device for a tap-changing part according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in Figure 1, the filter device of the present invention is provided with a housing (10). An
The
An
The
On the other hand, the
The upper part of the
On the other hand, the structure of the tap-changer part system which the filter apparatus of this invention is used is demonstrated. The
The
A plurality of
The
It will be described below that the insulating oil filter device of the tap-changing part according to the present invention having the configuration as described above is used.
When the switching action occurs in the
This may use a suction force of the
In other words, the large amount of foreign matter that can be blocked at once the
In addition, forming the
Insulating oil is supplied to the
In this way, the insulating oil pressurized by the
In addition, the
The insulating oil sucked by the
On the other hand, when there is a large amount of bubbles in the
Then, the amount of the insulating oil flowing through the
The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.
10: housing 12: inner space
14: oil suction piping 16: oil discharge piping
18: oil pump 20: filter
22: flow meter 24: bubble exhaust valve
26: bubble observation window 27: oil gauge
28: tap-changing part 30: protective relay
32: conservator 34: entrance
36: suction hole 38: strainer
Claims (6)
An oil suction pipe for supplying insulating oil to the inside of the housing;
An oil discharge pipe discharging the insulating oil from the housing;
Insulating oil filter device of the tap-changing unit is installed in the inner space of the housing including an oil pump for pressurizing the insulating oil in the inner space to discharge directly to the oil discharge pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110138929A KR20130071622A (en) | 2011-12-21 | 2011-12-21 | Insulating oil filtering apparatus for on load tap changer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110138929A KR20130071622A (en) | 2011-12-21 | 2011-12-21 | Insulating oil filtering apparatus for on load tap changer |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20130071622A true KR20130071622A (en) | 2013-07-01 |
Family
ID=48986560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020110138929A KR20130071622A (en) | 2011-12-21 | 2011-12-21 | Insulating oil filtering apparatus for on load tap changer |
Country Status (1)
Country | Link |
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KR (1) | KR20130071622A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108172371A (en) * | 2018-02-13 | 2018-06-15 | 沈阳新工变压器附件厂 | Oil gas shunting gas operated device |
KR101940999B1 (en) * | 2018-12-19 | 2019-01-22 | 한국메가와트 주식회사 | Insulation oil filtering apparatus of power transformer |
-
2011
- 2011-12-21 KR KR1020110138929A patent/KR20130071622A/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108172371A (en) * | 2018-02-13 | 2018-06-15 | 沈阳新工变压器附件厂 | Oil gas shunting gas operated device |
CN108172371B (en) * | 2018-02-13 | 2024-05-31 | 沈阳新工变压器附件厂 | Oil-gas split-flow type air guide device |
KR101940999B1 (en) * | 2018-12-19 | 2019-01-22 | 한국메가와트 주식회사 | Insulation oil filtering apparatus of power transformer |
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