KR101547511B1 - Apparatus for gas emitting of transformer and method thereof - Google Patents

Apparatus for gas emitting of transformer and method thereof Download PDF

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Publication number
KR101547511B1
KR101547511B1 KR1020140138110A KR20140138110A KR101547511B1 KR 101547511 B1 KR101547511 B1 KR 101547511B1 KR 1020140138110 A KR1020140138110 A KR 1020140138110A KR 20140138110 A KR20140138110 A KR 20140138110A KR 101547511 B1 KR101547511 B1 KR 101547511B1
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South Korea
Prior art keywords
gas
oltc
cylinder
gas discharge
unit
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KR1020140138110A
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Korean (ko)
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박용수
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(주)효명
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    • 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
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

The present invention relates to an OLTC cylinder gas discharge apparatus and method for a power transformer, and more particularly, to an OLTC cylinder of a transformer in which tapped air is ventilated and oil for insulation is accommodated therein, and one side is connected to an upper cover of the OLTC cylinder through a gas suction pipe And the other side is connected to a gas discharge pipe and detects the amount of gas collected from the OLTC cylinder through the gas suction pipe. If the detected gas amount exceeds the stored gas discharge reference value, the gas collected from the OLTC cylinder And a gas exhaust reference value for externally discharging the gas generated in the OLTC cylinder is stored. When the amount of gas sensed by the gas sensor exceeds the pre-stored gas exhaust reference value Driving for discharging the gas generated in the OLTC cylinder to the outside through the gas discharge pipe And a control unit that controls, based on the drive control signal input from the control handle to open and close the valve the valve driving section, and is provided on the gas discharge pipe, a valve for performing opening and closing operation on the basis of the control of the valve driving unit.
Therefore, the present invention can prevent the malfunction caused by the gas generated in the OLTC cylinder of the power transformer, so that the power transformer can be stably operated, the maintenance is easy, and the management cost is reduced.

Description

[0001] The present invention relates to an OLTC cylinder gas exhausting apparatus for a power transformer,

The present invention relates to an OLTC cylinder gas discharge apparatus and method for a power transformer for discharging noxious gas or air bubbles generated in an OLTC cylinder of a power transformer to the outside.

Generally, a transformer is an electric power supply device for stably supplying electric power to a load device that receives electric power by increasing or decreasing a voltage on a transmission / distribution line.

In this way, a transformer installed to raise or lower the voltage of the transmission / distribution line is an important component of the power system, and plays a large role in stabilizing the power supply.

The transformer is equipped with an on-load tap changer (OLTC) to maintain a constant voltage range suitable for the installation location to accommodate the voltage drop caused by variations in power demand.

The tap changer can adjust the transformer ratio of the transformer without affecting the active power or the reactive power in the live line state (hot-line, electricity flowing state), so it can be extended to the transformer of 765kV transformer And is usually installed in a transformer filled with insulating oil.

However, in the process of driving the tap changer, various kinds of harmful gas such as oxygen, nitrogen, carbon dioxide, hydrogen, methane, and carbon monoxide may be generated due to the generation of arc (ARC) The tap changer may malfunction due to the arc caused by the ventilation operation or the insulating oil may be contaminated.

However, since the conventional transformer equipped with the tap changer uses a method in which harmful gas or bubbles generated inside are directly discharged to the outside, the harmful gas or bubbles generated in the ventilation of the transformer can be smoothly discharged to the outside If the tap changer or insulation oil does not function normally due to weather conditions such as low or high pressure or rain, internal inflow of outside air or dust, malfunction due to malfunction of the tapped ventilation or contamination of insulating oil, , Equipment accidents, electric fires, explosions, and the like.

Korean Registered Patent No. 10-0951247 Nov. 4, 2010 Korean Registered Patent No. 10-1323489 Sep. 23,

The present invention provides an OLTC cylinder gas discharge apparatus and method for a power transformer for automatically discharging noxious gas or bubbles generated in an OLTC cylinder of a power transformer to the outside.

In order to prevent a malfunction caused by residual gas generated in the OLTC cylinder in the course of driving a power transformer having a tap changer, An in-cylinder gas exhaust apparatus and method thereof are provided.

The present invention relates to a method for preventing external air, moisture, dust, etc., which may be generated when an OLTC hot-water filter unit (Oil Filter Unit) is driven in the process of discharging noxious gas or bubbles from the inside, An apparatus for discharging gas in an OLTC cylinder of a power transformer and a method thereof are provided.

The OLTC cylinder gas discharge device of the power transformer according to an embodiment of the present invention includes an OLTC cylinder, one side connected to the upper cover of the OLTC cylinder through a gas suction pipe, the other side connected to a gas discharge pipe, A gas sensing unit for sensing the amount of gas collected from the OLTC cylinder through the gas discharge pipe and discharging the gas collected from the OLTC cylinder to the outside based on the control of the control unit when the sensed gas amount exceeds the pre- And the gas discharge reference value for the external discharge of the gas generated in the OLTC cylinder is stored. If the gas amount sensed by the gas sensor exceeds the stored gas discharge reference value, the gas generated in the OLTC cylinder is discharged to the outside A control unit for controlling the driving for discharging, A valve driving unit for processing the opening and closing of the valve, and a valve installed on the gas exhausting pipe and performing an opening and closing operation based on the control of the valve driving unit.

According to another aspect of the present invention, there is provided a method of discharging gas in an OLTC cylinder of a power transformer, comprising the steps of: (1) connecting a gas sensing unit connected to an OLTC cylinder of a transformer, Detecting the amount of gas collected from the OLTC cylinder through the gas suction pipe, and (2) controlling the amount of gas detected by the gas sensor to discharge the gas stored in the OLTC cylinder to the outside (3) If the amount of gas detected by the gas sensing unit exceeds the previously stored gas discharge reference value, the control unit determines whether the gas generated in the OLTC cylinder is discharged to the outside through the gas discharge pipe (4) the gas sensing unit generates a drive control signal for outputting the drive control signal to the gas sensing unit and the valve driving unit, and And the valve driving unit starts opening the valve provided on the gas discharge pipe based on the drive control signal inputted from the control unit, And discharging the gas generated in the OLTC cylinder to the outside through the gas discharge pipe connected to one side of the part.

As described above, according to the OLTC cylinder gas discharge apparatus and method of the power transformer of the present invention, bubbles and various harmful gases generated in the OLTC cylinder of the power transformer equipped with the tap changer are discharged to the outside, Water, dust and the like due to the driving of the hot-water filtering device which may be generated during the discharge process, thereby preventing the leakage of bubbles or noxious gas generated inside the OLTC cylinder of the power transformer (for example, , Protective relay) and contamination of insulating oil, thereby preventing the occurrence of various safety accidents such as power outages, facility accidents, electric fires, and explosions, thereby enabling stable operation of power transformers .

In addition, it is possible to reduce the manpower related to transformer replacement and maintenance based on the stable operation of the power transformer, which is very convenient for maintenance and can greatly reduce the management cost.

1 is a perspective view schematically showing a configuration of a power transformer to which the present invention is applied.
FIG. 2 is a schematic view showing a configuration of an OLTC cylinder gas-discharging device of a power transformer according to an embodiment of the present invention.
3 is a flowchart illustrating an operation procedure of a method of discharging gas in the OLTC cylinder of the power transformer according to an embodiment of the present invention in detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for discharging a gas in an OLTC cylinder of a power transformer of the present invention and a method thereof will be described in detail with reference to the accompanying drawings. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Like parts are designated with like reference numerals throughout the specification.

FIG. 1 is a perspective view schematically showing a configuration of a power transformer to which the present invention is applied, and FIG. 2 is a schematic view of a configuration of an OLTC cylinder gas discharge device of a power transformer according to an embodiment of the present invention.

As shown, the power transformer 1 of the present invention includes an OLTC cylinder 10, a gas sensing unit 20, a gas suction pipe 30, a gas discharge pipe 40, a control unit 50, a time measuring unit 60 ). Valve drive unit 70. A valve 80, an alarm generator 90, and the like.

The OLTC cylinder 10 is provided in a transformer provided with an oil for tapping and insulating oil therein and is connected to the gas sensing unit 20 through a gas suction pipe 30. And is connected to the hot-water filtering apparatus 100 through an insulating oil suction pipe 110 and an insulating oil supply pipe 120.

One side of the gas sensing unit 20 is connected to the upper cover of the OLTC cylinder 10 through the gas suction pipe 30 and the other end of the gas sensing unit 20 is connected to the gas discharge pipe 40, Detects the amount of gas collected from the cylinder (10) and outputs it to the controller (50). When the detected gas amount exceeds the pre-stored gas discharge reference value, the gas collected from the OLTC cylinder 10 is discharged through the gas discharge pipe 40 to the outside based on the control of the controller 50.

The control unit 50 stores a gas discharge reference value for discharging the gas generated from the OLTC cylinder 10. When the amount of gas sensed by the gas sensor 20 exceeds the stored gas discharge reference value, ) Through the gas discharge pipe (40) to the outside. That is, when the amount of gas sensed by the gas sensing unit 20 exceeds a previously stored gas discharge reference value, the control unit 50 outputs a drive control signal for discharging the gas generated in the OLTC cylinder 10 through the gas discharge pipe 40 And outputs the generated drive control signal to the gas sensing unit 20 and the valve driving unit 70 to open the valve 80 on the gas discharge pipe 40 so that the gas generated in the OLTC cylinder 10 is discharged to the outside .

In this case, the stored gas discharge reference value is preferably set to 200 cc, and it can be arbitrarily changed according to the use environment.

The control unit 50 controls the operation of the insulating oil suction pipe 110 and the insulating oil supply pipe 110 in the process of discharging the gas generated from the OLTC cylinder 10 through the gas discharge pipe 40 connected to the gas sensing unit 20. [ The valve driving unit 70 generates a driving control signal for closing the valve 80 and outputs the driving control signal to the valve driving unit 70 when the driving of the hot-water filtering apparatus 100 connected to the OLTC cylinder 10 is sensed. Moisture, dust, etc. from the outside through the gas discharge pipe 40 and the outside of the OLTC cylinder 10 through the gas discharge pipe 40. [

The time measurement unit 60 measures the time and outputs the measured time to the control unit 50 when the discharge of the gas generated in the OLTC cylinder 10 is started through the gas sensing unit 20 and the gas discharge pipe 40. In this case, the control unit 50 compares the time measured by the time measuring unit 60 with the previously stored gas discharge reference time, and when the time measured by the time measuring unit 60 passes the pre-stored gas discharge reference time, 80, and outputs the generated drive control signal to the valve driving unit 70. [

The valve driving unit 70 processes the opening and closing of the valve 80 based on the drive control signal input from the control unit 50. [ At this time, the valve driving unit 70 may use any one of known relays, switches, and semiconductor devices.

The valve 80 is installed on the gas discharge pipe 40 and performs an opening / closing operation based on the control of the valve driving unit 70. That is, the valve 80 is opened based on the drive control of the valve driving unit 70 so as to discharge the gas in the gas discharge pipe 40 to the outside or to close the valve 80 based on the drive control of the valve driving unit 70, Thereby preventing air, moisture, dust, etc. from entering the OLTC cylinder 10 from the outside.

At this time, it is most preferable that the valve 80 is constituted by a solenoid valve, but it is not limited thereto, and any known valve may be used.

The alarm generating unit 90 may be configured such that the amount of gas collected from the OLTC cylinder 10 sensed by the gas sensing unit 20 exceeds the previously stored gas discharge reference value or the time measured by the time measuring unit 60 exceeds the pre- When the discharge reference time elapses, an alarm sound is generated based on the control of the control unit (50).

Next, an embodiment of the method for discharging the gas in the OLTC cylinder of the power transformer according to the present invention constructed as above will be described in detail with reference to FIG. At this time, each step according to the method of the present invention may be changed in the use environment or the order by a person skilled in the art.

3 is a flowchart illustrating an operation procedure of a method of discharging gas in the OLTC cylinder of the power transformer according to an embodiment of the present invention in detail.

The gas sensing part 20 connected to the OLTC cylinder 10 of the transformer 1 in which the tapped air and the insulating oil are accommodated is connected to the OLTC cylinder 10 through the gas suction pipe 30, (10), and outputs the detection result to the control unit (50) (S10).

The control unit 50 determines whether the gas amount detected by the gas sensing unit 20 exceeds the pre-stored gas discharge reference value for discharging the gas generated in the OLTC cylinder 10 to the outside (S20).

If it is determined in step S20 that the amount of gas detected by the gas sensing unit 20 exceeds the previously stored gas discharge reference value, the controller 50 discharges the gas generated in the OLTC cylinder 10 through the gas discharge pipe 40 And outputs the generated drive control signals to the gas sensing unit 20 and the valve driving unit 70, respectively (S30).

The gas sensing unit 20 starts discharging the gas collected from the OLTC cylinder 10 through the gas discharge pipe 40 based on the drive control signal input from the control unit 50. The valve driving unit 70 controls the gas- The valve 80 provided on the gas discharge pipe 40 is opened based on the drive control signal input from the control unit 50 to process the external discharge of the gas (S40). The gas generated in the OLTC cylinder 10 passes through the gas suction pipe 30, the gas sensing part 20, the gas discharge pipe 40 and the valve 80 in order to be discharged to the outside.

When the gas generated in the OLTC cylinder 10 is discharged to the outside through the gas discharge pipe 40 through step S40, the controller 50 measures the discharge time of the gas through the time measuring part 60 (S50 , It is determined whether the time measured by the time measuring unit 60 has passed the previously stored gas discharge reference time (S60).

As a result of the determination in step S60, when the time measured by the time measuring unit 60 passes the pre-stored gas discharge reference time, the controller 50 generates a drive control signal for closing the valve 80 that is currently being opened, And outputs the drive control signal to the valve driving unit 70 (S70).

The valve driving unit 70 closes the valve 80 provided on the gas discharge pipe 40 based on the drive control signal input from the control unit 50 and supplies the valve 80 to the inside of the OLTC cylinder 10 through the gas discharge pipe 40 And the external discharge of generated gas is blocked (S80).

When the gas generated in the OLTC cylinder 10 is discharged to the outside through the gas discharge pipe 40 in step S40, the control unit 50 detects the driving of the hot-water filtering apparatus 100 connected to the OLTC cylinder 10 The controller 80 generates a drive control signal for closing the valve 80 that is currently being opened, and outputs the drive control signal to the valve driver 70. The valve driving unit 70 closes the valve 80 provided on the gas discharge pipe 40 based on the drive control signal input from the control unit 50 to discharge the gas from the outside and the air, The inflow can be blocked. That is, when the live filtration apparatus 100 is driven while the gas generated in the OLTC cylinder 10 is discharged to the outside through the gas discharge pipe 40 connected to the gas sensing unit 20, the gas discharge pipe 40 is opened Moisture, dust, and the like may flow into the interior of the OLTC cylinder 10 through the gas discharge pipe 40 in this process, so that the device malfunction or the insulating oil may be contaminated To prevent this, the valve 80 is closed.

When the power generating transformer 1 is provided with the alarm generating unit 90, the amount of gas collected from the OLTC cylinder 10 sensed by the gas sensing unit 20 as a result of the determination in step S20 is stored in the pre- When the time measured by the time measuring unit 60 exceeds the reference value or the time measured in the step S60 exceeds the pre-stored gas discharge reference time, the alarm generating unit 90 may generate an alarm sound.

As described above, the present invention prevents erroneous operation of the taps and pollution of insulation oil by the gas in the OLTC cylinder of the power transformer, and also prevents external air, Moisture, dust, etc. can be blocked, so that the power transformer can be operated stably.

In addition, it is very easy to maintain and maintain the power transformer based on stable operation, which can greatly reduce the management cost.

It will be apparent to those skilled in the art that various modifications may be made to the invention without departing from the spirit and scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

1: Power Transformer
10: OLTC cylinder
20: gas detection unit
30: gas suction pipe
40: gas discharge pipe
50:
60: time measuring unit
70:
80: Valve
90:
100: Live filter
110: oil suction pipe for insulation
120: Insulation oil supply pipe

Claims (9)

OLTC (On Load Tap Changer) cylinder,
The OLTC cylinder is connected to the upper cover of the OLTC cylinder through a gas suction pipe and the gas discharge pipe is connected to the other end thereof. The amount of gas collected from the OLTC cylinder is sensed through the gas suction pipe, A gas sensor for discharging the gas collected from the OLTC cylinder to the outside through the gas discharge pipe based on the control of the control unit when the discharge reference value is exceeded,
And a gas discharge reference value for external discharge of gas generated in the OLTC cylinder is stored. When the gas amount sensed by the gas sensor exceeds a pre-stored gas discharge reference value, gas generated in the OLTC cylinder is discharged to the gas discharge pipe A control unit for controlling driving for discharging to the outside through the control unit,
A valve driving unit for opening and closing a valve on the basis of a drive control signal input from the control unit,
And a valve installed on the gas discharge pipe and performing an opening and closing operation based on the control of the valve driving unit,
Wherein,
When the operation of the live filtration apparatus connected to the OLTC cylinder is detected through the insulation oil suction pipe and the insulation oil supply pipe in the process of discharging gas generated from the OLTC cylinder through the gas discharge pipe, And outputs the generated driving control signal to the valve driving unit to shut off the external discharge of the gas and the inflow of air, moisture and dust from the outside through the closing of the valve. The method according to claim 1,
Further comprising a time measuring unit for measuring time when the discharge of the gas generated inside the OLTC cylinder starts through the gas discharge pipe,
Wherein the controller generates and outputs a drive control signal for closing the valve when the time measured by the time measuring unit exceeds a pre-stored gas discharge reference time and outputs the drive control signal to the valve driving unit. 3. The method of claim 2,
When the amount of gas collected from the OLTC cylinder sensed by the gas sensing unit exceeds a previously stored gas discharge reference value or when the time measured by the time measuring unit passes a pre-stored gas discharge reference time, And an alarm generating unit for generating a sound in the OLTC cylinder of the power transformer. The method according to claim 1,
The gas discharge reference value,
200cc, and can be arbitrarily changed in the OLTC cylinder of the power transformer. delete (1) The gas sensing unit connected to the OLTC cylinder of the transformer accommodating the oil for tapping and insulating oil therein through the gas suction pipe detects the amount of gas collected from the OLTC cylinder through the gas suction pipe,
(2) The control unit determines whether the gas amount detected by the gas sensing unit exceeds a pre-stored gas discharge reference value for discharging the gas generated in the OLTC cylinder to the outside,
(3) When the gas amount detected by the gas sensing unit exceeds the pre-stored gas discharge reference value as a result of the determination in the step (2), the control unit controls the gas discharge unit to discharge gas generated in the OLTC cylinder to the outside through the gas discharge pipe Outputting a drive control signal to the gas sensing unit and the valve driving unit after generating the drive control signal, and
(4) The gas sensing unit starts discharging the gas collected from the OLTC cylinder through the gas discharge pipe based on a drive control signal input from the control unit, and the valve driving unit outputs a drive control signal input from the control unit And opening the valve provided on the gas discharge pipe to exhaust the gas generated in the OLTC cylinder through the gas discharge pipe connected to one side of the gas sensing unit,
In the step (4), when gas generated in the OLTC cylinder is discharged to the outside through the gas discharge pipe, when the operation of the live filtration apparatus connected to the OLTC cylinder is sensed, And outputting the signal to the valve driving unit to shut off the external discharge of the gas and the inflow of air, moisture and dust from the outside through the closing of the valve. The method according to claim 6,
(5) The control unit may include measuring time through a time measuring unit after starting discharge of gas through the gas discharge pipe,
(6) The control unit may determine whether a time measured by the time measuring unit exceeds a pre-stored gas discharge reference time,
(7) The control unit may generate a drive control signal for closing the valve when the time measured by the time measuring unit has elapsed after the stored gas discharge reference time as a result of the determination in step (6) To the valve driving unit, and
(8) The step of closing the valve provided on the gas discharge pipe based on the drive control signal input from the control unit to block the discharge of the gas generated in the OLTC cylinder through the gas discharge pipe Wherein the power transformer is a gas generator. 8. The method of claim 7,
If it is determined in step (2) that the amount of gas collected from the OLTC cylinder sensed by the gas sensing unit exceeds a pre-stored gas discharge reference value, or the time measured by the time measuring unit as a result of the determination in step (6) And generating an alarm sound through the alarm generating unit when the pre-stored gas discharge reference time elapses. delete
KR1020140138110A 2014-10-14 2014-10-14 Apparatus for gas emitting of transformer and method thereof KR101547511B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180005347A (en) * 2016-07-06 2018-01-16 현대일렉트릭앤에너지시스템(주) Method and system for oil filtering of transfomer
CN114155693A (en) * 2021-12-02 2022-03-08 华南蓝天航空油料有限公司 Oil delivery pipeline air intake early warning method and early warning system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007035896A (en) * 2005-07-27 2007-02-08 Mitsubishi Electric Corp Monitoring apparatus for on-load tap changer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007035896A (en) * 2005-07-27 2007-02-08 Mitsubishi Electric Corp Monitoring apparatus for on-load tap changer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180005347A (en) * 2016-07-06 2018-01-16 현대일렉트릭앤에너지시스템(주) Method and system for oil filtering of transfomer
KR102145838B1 (en) * 2016-07-06 2020-08-19 현대일렉트릭앤에너지시스템(주) Method and system for oil filtering of transfomer
CN114155693A (en) * 2021-12-02 2022-03-08 华南蓝天航空油料有限公司 Oil delivery pipeline air intake early warning method and early warning system

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