KR101771552B1 - oil immersed transformer - Google Patents

oil immersed transformer Download PDF

Info

Publication number
KR101771552B1
KR101771552B1 KR1020150188510A KR20150188510A KR101771552B1 KR 101771552 B1 KR101771552 B1 KR 101771552B1 KR 1020150188510 A KR1020150188510 A KR 1020150188510A KR 20150188510 A KR20150188510 A KR 20150188510A KR 101771552 B1 KR101771552 B1 KR 101771552B1
Authority
KR
South Korea
Prior art keywords
housing
arc
insulating oil
outside
heat
Prior art date
Application number
KR1020150188510A
Other languages
Korean (ko)
Other versions
KR20170078207A (en
Inventor
박기주
김성만
Original Assignee
주식회사 케이디파워
박기주
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 케이디파워, 박기주 filed Critical 주식회사 케이디파워
Priority to KR1020150188510A priority Critical patent/KR101771552B1/en
Publication of KR20170078207A publication Critical patent/KR20170078207A/en
Application granted granted Critical
Publication of KR101771552B1 publication Critical patent/KR101771552B1/en

Links

Images

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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • 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
    • 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
    • H01F27/085—Cooling by ambient air

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

The present invention relates to an input transformer for quickly detecting an arc generated in an insulating oil in a transformer to prevent an electric power device and a human accident in advance. The input transformer includes a housing having an inner space, A heat dissipating fin formed on each side of the housing and radiating heat radiated from the inside through the housing; and at least one surface of the housing penetrating the housing, An arc detecting part extending to the upper side of the housing and extending to the insulating oil so as to protrude to the outside in order to discharge heat generated in the inside of the housing to the outside, A heat pipe having both sides spaced apart from each other at regular intervals And a cooling pen formed on both sides of the heat pipe to blow air outside the housing to the openings on both sides of the heat pipe and to radiate heat to the outside to dissipate the internal heat transmitted through the housing .

Description

Oil immersed transformer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflow transformer, and more particularly, to an inflow transformer capable of detecting an arc generated in insulating oil.

In general, with the increase in electric power demand, transformers are becoming larger and higher in pressure, and substations are becoming unmanned. If an accident occurs in such a large capacity transformer, the ripple effects are wide, the economic loss and psychological anxiety become large, and the necessity of the insulation diagnosis to prevent the accident of the transformer is increasing.

Recently, in order to secure the reliability of the transformer and supply the electric power stably, there has been developed an always-on monitoring device for always measuring an anomaly that is the beginning of an accident in the operating state of the transformer. , And a diagnosis diagnosis system is developed to stop the operation and to take countermeasures if the abnormality develops due to the abnormality. .

FIG. 1 is a schematic view showing a conventional inflow transformer.

As shown in FIG. 1, the conventional inflowing transformer 1 has a structure in which a heat dissipating unit 2 is installed on one side of an inflowing transformer 1 in which an insulating oil and a transformer (not shown) are incorporated. The heat dissipating unit 2 is formed of a plurality of heat dissipating plates 2a. A connecting pipe 2b is coupled to each of the upper and lower portions of the heat sink 2a so that the insulating oil can flow therethrough and the combined heat sink 2a is welded to the input transformer 1. [

 In the conventional inflowing transformer, thermal deterioration due to high temperature operation, thermal deterioration due to an external short circuit, mechanical deterioration, and discharge deterioration due to partial discharge frequently occur, resulting in mechanical strength deterioration, increased vibration, Which leads to dielectric breakdown.

Therefore, the insulation breakdown of the transformer due to overheating has caused many problems such as the explosion of the transformer, the short circuit, and the like.

In order to minimize the failure of such an inflow transformer, the insulating oil in the transformer was sampled regularly and the deterioration of the transformer was checked by measuring the deterioration in the laboratory. Since the insulating oil is to be collected every time a certain amount of insulating oil is measured in the valve, There is a problem that other gases and moisture are introduced into the atmosphere during collection and there is a possibility of being exposed to the outside even during transportation, so that it is difficult to collect and analyze the insulating oil accurately.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an input transformer that can quickly detect an arc generated in an insulating oil in a transformer to prevent a power device and human casualties in advance.

In addition, the present invention provides an inflow transformer that can measure an inclination and a vibration of a main body together with an arc generated from an insulating oil flowing into a transformer, and transmit and receive in real time to easily understand an abnormal situation of a transformer, There is another purpose to provide.

According to another aspect of the present invention, there is provided an inflow transformer comprising: a housing having an inner space; insulating oil having insulation property for cooling heat generated in a process of transforming the inside of the housing; And an arc detecting part for detecting an arc generated in the insulating oil and extending to the insulating oil inside the housing through at least one surface of the housing to transmit the detected arc to the outside, A heat pipe protruding to the upper side of the housing and extending to the insulating oil so as to protrude outward to discharge heat generated in the housing to the outside, Which is provided on both sides of the heat pipe That the blow opening of the discharge side at the same time and zoom to the outside is constituted by a cooling pen to dissipate the heat from inside pass through the housing is characterized.

The inflow transformer according to the embodiment of the present invention has the following effects.

First, the arc generated in the insulating oil inside the transformer can be detected quickly, so that the electric power equipment and human accidents can be prevented in advance.

Second, it can measure the tilt and vibration of the main body together with the arc generated from the insulating oil flowing into the transformer, and transmit and receive it in real time, so that it is easy to grasp the abnormal condition of the transformer and take an immediate action in case of an abnormal situation.

1 is a schematic diagram of a prior art inflow transformer;
2 is a perspective view schematically showing an inflow transformer according to a first embodiment of the present invention;
Figure 3 is a side view of the inflow transformer of Figure 2;
FIG. 4 is a plan view schematically showing the arc detection unit in FIG.
5 is a side view schematically showing an inflow transformer according to a second embodiment of the present invention;
FIG. 6 is a diagram for explaining a method for detecting an arc in the input transformer of FIG. 5;
7 is a view for explaining an arc of insulating oil in an inflow transformer according to a third embodiment of the present invention;
8 is a side view schematically showing an inflow transformer according to a fourth embodiment of the present invention

Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 2 is a perspective view schematically showing an inflow transformer according to a first embodiment of the present invention, FIG. 3 is a side view showing an inflow transformer of FIG. 2, and FIG. 4 is a plan view schematically showing an arc detection unit in FIG.

2 and 3, the input transformer 100 according to the first embodiment of the present invention includes a transformer (not shown) composed of a primary coil and a secondary coil and a mutual induction function A housing 110 for accommodating the mutually coupled trans coils and field iron cores for cooling the heat generated in the transforming process inside the housing 110, A radiating fin 120 radiating heat from the interior of the housing 110 through the housing 110 and having a corrugated fin structure on each side of the housing 110, An arc detecting unit 130 extending at least from one side of the housing 110 to the insulating oil in the housing 110 to detect and deliver an arc generated in the insulating oil to the outside, Projecting upward A heat pipe 140 extending to the insulating oil and having both sides protruding outwardly at regular intervals so as to discharge heat generated in the housing 110 to the outside, And a cooling fan (not shown) disposed on both sides of the housing 110 for blowing air outside the housing 110 to the openings on both sides of the heat pipe 140 and discharging the air to the outside, (150).

The housing 110 is rectangular and has a conductor and a high-voltage bushing 160 for conducting insulation to transport current supplied from the outside to the inside of the transformer 100, and a reduced- Pressure bushing 190 is installed.

The high-pressure bushing 160 is disposed on the side of the housing 110 at an upward inclination, and a preferred angle of inclination is 45 degrees. The high pressure bushing (160) is installed such that its end is not higher than that of the low pressure bushing (190). This compensates for the deformed height of the inflow transformer 100 by the high-pressure bushing 160, which enables the transformer size to be compact without a reduction in capacity.

Further, a winding thermometer 170 installed adjacent to a coil (winding) inside the housing 110 and a low-pressure gas releasing respirator 180 when the internal pressure of the housing rises are provided.

The winding thermometer 170 is installed in a state of being in contact with a direct coil (winding) unlike the oil temperature gauge that measures temperature using insulating oil as a medium, so that the temperature of the actual coil is quickly displayed in real time. It reads and displays the temperature of the coil accurately and quickly than the case of the oil temperature meter which reads the transfer temperature by insulating oil and shows it by the coil temperature.

In the first embodiment of the present invention, the housing 110 is described as having a rectangular shape, but the present invention is not limited thereto. For example, the housing 110 may have a cylindrical shape or a polygonal shape.

A radiating fin 120 is installed on the outside of the housing 110 to communicate with the housing 110 to circulate the insulating fluid.

The cooling pen 150 is configured to introduce outside air into the upper portion of the heat pipe 140 and to suck and discharge air in the upper portion of the heat pipe 140.

In other words, the cooling pen 150 is configured to function in a mutually contradictory manner to more effectively cool the heat introduced into the heat pipe 140 through the external air, and at the same time, So that it can be discharged quickly.

Meanwhile, the cooling pen 150 may be opposed to each other to allow outside air to flow into the heat pipe 140 and be discharged to the outside.

The heat dissipation fin 120 is composed of an aluminum fin inserted into a copper pipe to dissipate the high temperature of the dielectric oil to the outside. The length of the aluminum fin can be appropriately used according to the capacity of the transformer.

The insulating oil is classified into low temperature, middle low temperature, high temperature and the like. In the case of insulating oil of the transformer, since the oil temperature must be maintained at around 55 degrees, if water or alcohol such as middle and low temperature is used, distilled water .

The cooling pen 150 is composed of a low-noise, large-volume AC cooling fan and its specifications can be appropriately used depending on the size of the inflow transformer 100 and the heat pipe 140.

3, the arc detecting unit 130 includes a U-shaped transparent coupling 131 extending to the insulating oil in the housing 110, and a U-shaped transparent coupler 131 coupled to the transparent coupling 131, An arc detection sensor 132 coupled to a side surface of the housing 110 for detecting an arc of insulating oil through the transparent coupling 131, And a head unit 134 coupled to the outer surface of the housing 110 so as to protrude from the outer surface of the housing 110 and incorporating the arc detection sensor 132 and the wireless sensor module 133.

The arc detecting unit 130 is mechanically housed in order to prevent damage to the sensor unit when the transformer is installed and transported.

Here, the arc detection sensor 132 is configured to measure temperature up to and including the deterioration of the insulating oil transmitted through the transparent coupling 131, and the head unit 134 is configured to measure the temperature of the housing 110 (Not shown) formed on at least one side or an upper portion thereof.

The arc detection sensor 132 may be installed at any position capable of detecting an arc generated in the insulating oil in the housing 110. For example, it may be provided so as to pass through the radiating fin 120.

FIG. 5 is a side view schematically showing an inflow transformer according to a second embodiment of the present invention, and FIG. 6 is a view for explaining a method for detecting an arc in the inflow transformer of FIG.

5 and 6, the inflow transformer according to the second embodiment of the present invention is different from that of FIG. 2 in that the arc detecting unit 130 is not coupled to the housing 110, and the arc detecting unit 130 A point sensor 135 for detecting an arc of insulating oil through the transparent window 111 and a point sensor 135 for detecting an arc of the insulating oil through the transparent window 111, And a cable 136 connected to the point sensor 135 and transmitted to the outside through the arc information detected through the point sensor 135.

The manager can directly check the deterioration state or insufficiency of the insulating oil through the transparent window 111.

7 is an explanatory view for detecting an arc of insulating oil in the inflow transformer according to the third embodiment of the present invention.

As shown in FIG. 7, the inflow transformer according to the third embodiment of the present invention includes a transparent tube 131 extending through one side of the housing 110 to the insulating oil, A point sensor 135 for detecting an arc of the insulating oil; a cable 136 for receiving and transmitting the arc information detected by the point sensor 135; a cable 136 connected to the cable 136, And a fixing unit 137 which receives the received arc information and transmits the arc information to the outside and is coupled to one side of the housing 110 while supporting the transparent tube 131 and the cable 136.

8 is a side view schematically showing an inflow transformer according to a fourth embodiment of the present invention.

As shown in FIG. 8, the inflow transformer according to the fourth embodiment of the present invention is configured on the lower side surface of the housing 110 to measure the tilt and vibration of the housing 110 Except that a detection sensor unit 200 for transmitting to the outside is provided.

Accordingly, the inflow transformer according to the fourth embodiment of the present invention easily detects the abnormal condition of the transformer by measuring the inclination and vibration of the main body together with the arc generated in the insulating oil flowing into the transformer and transmitting and receiving in real time, .

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Will be apparent to those of ordinary skill in the art.

110: housing 120: radiating fin
130: arc detection unit 140: heat pipe
150: cooling pen

Claims (6)

A housing having an internal space;
An insulating oil having an insulating property for cooling the heat generated in the transforming process inside the housing,
A radiating fin formed on each side surface of the housing to radiate internal heat transmitted through the housing,
An arc detecting portion extending at least from one side of the housing to the insulating oil in the housing through the housing to detect an arc generated in the insulating oil and deliver it to the outside,
A heat pipe protruding to the upper side of the housing and extending to the insulating oil so that the protruded portions protrude outward to release heat generated in the housing to the outside,
And a cooling pen formed on both sides of the heat pipe to blow air outside the housing to the openings on both sides of the heat pipe and to radiate heat to the outside to dissipate the internal heat transmitted through the housing,
The arc detection unit includes a U-shaped transparent coupling extending to the insulating oil inside the housing, an arc detection sensor coupled to the transparent coupling and coupled to the side of the housing for detecting an arc of insulating oil through the transparent coupling, A wireless sensor module that transmits the arc information detected by the arc detection sensor to the outside, and a head portion that is coupled to the outer surface of the housing and includes the arc detection sensor and the wireless sensor module. Inflow transformer. delete The arc detecting sensor according to claim 1, wherein the arc detecting sensor measures temperature up to and including temperature deterioration of the insulating oil transmitted through the transparent coupling, and the head is fixed to a hole formed on at least one side or an upper portion of the housing . The point sensor according to claim 1, wherein the arc detecting unit comprises: a transparent window formed on one side of the housing, the state of the insulating oil being visible from the outside; a point sensor for detecting an arc of insulating oil through the transparent window; And a cable for transmitting the arc information detected through the point sensor to the outside. The arc sensor according to claim 1, wherein the arc detecting unit comprises: a transparent tube extending through one side of the housing to extend to the insulating oil; a point sensor embedded in the transparent tube for detecting an arc of the insulating oil; And a fixing part which is connected to the cable and receives arc information transmitted through the cable and transmits the light to the outside and is coupled to one side of the housing while supporting the transparent tube and the cable Characterized by an inflow transformer. The inflow transformer according to claim 1, further comprising a sensing sensor unit formed on a lower side surface of the housing to measure a tilt and a vibration of the housing and transmit the measurement to the outside.
KR1020150188510A 2015-12-29 2015-12-29 oil immersed transformer KR101771552B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150188510A KR101771552B1 (en) 2015-12-29 2015-12-29 oil immersed transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150188510A KR101771552B1 (en) 2015-12-29 2015-12-29 oil immersed transformer

Publications (2)

Publication Number Publication Date
KR20170078207A KR20170078207A (en) 2017-07-07
KR101771552B1 true KR101771552B1 (en) 2017-08-29

Family

ID=59353489

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150188510A KR101771552B1 (en) 2015-12-29 2015-12-29 oil immersed transformer

Country Status (1)

Country Link
KR (1) KR101771552B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102168207B1 (en) * 2018-04-09 2020-10-20 엘에스일렉트릭(주) Installation device of sensor for transformer
KR102013654B1 (en) * 2019-04-30 2019-08-23 주식회사 파워맥스 Power transformer with integrated sensor
CN110933792B (en) * 2019-12-04 2022-03-08 国网湖南省电力有限公司 Transformer fire-extinguishing true test insulating oil heating system and method
CN113325249B (en) * 2021-04-17 2023-09-29 国网山东省电力公司淄博供电公司 State evaluation device for box transformer

Also Published As

Publication number Publication date
KR20170078207A (en) 2017-07-07

Similar Documents

Publication Publication Date Title
KR101771552B1 (en) oil immersed transformer
KR101090143B1 (en) oil filled transformer using measuring sensor for condition insulation oil
US20080115924A1 (en) Electrical installation with a cooling element and method for operating said installation
JP2016524130A (en) Electrical conductor temperature monitoring system
KR102027743B1 (en) Integrated monitoring system for voltage and temperature of power cable joint point
US8827553B2 (en) Autonomous temperature transmitter
JP5677519B2 (en) Temperature detection device
TW201638593A (en) Multiple coil configuration for faulted circuit indicator
CN115842257A (en) EV charging connector with passive cooling and temperature sensor
CN104864981A (en) Method for temperature determination
CN104977092A (en) Temperature sensing device
KR102519785B1 (en) Apparatus, system and method for temperature measurement on dry transformers
CN108474695B (en) Temperature sensing device for sensing the temperature of an electrical conductor
WO2020220286A1 (en) Power cable joint device and electric system
EP2490011A1 (en) Optical gas sensor for use with electrical equipment and method for detecting gas in electrical equipment using said gas sensor
JP2006108560A (en) Current lead for superconductive apparatus
KR20090009602A (en) Apparatus for generating x-ray of high power
EP2568484A1 (en) Electro-magnetic device having a polymer housing
EP3396688A1 (en) Method of operating a transformer and apparatus for a transformer
KR100855743B1 (en) A safety Apparatus for indicating running state of transformer
ES2732210T3 (en) Liquid cooled electrical appliance
CN114126105A (en) Heat dissipation and heat insulation device of heater and electric heater with same
CN108036870B (en) A kind of method that casing running temperature safety is assessed under loading condition
CN111064324A (en) Wireless temperature sensor and assembly thereof, motor and air conditioner
CN107077942B (en) Winding element comprising a temperature measuring device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant