KR101652835B1 - OLTC Tap selector connection burnout monitoring device - Google Patents

OLTC Tap selector connection burnout monitoring device Download PDF

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Publication number
KR101652835B1
KR101652835B1 KR1020160005739A KR20160005739A KR101652835B1 KR 101652835 B1 KR101652835 B1 KR 101652835B1 KR 1020160005739 A KR1020160005739 A KR 1020160005739A KR 20160005739 A KR20160005739 A KR 20160005739A KR 101652835 B1 KR101652835 B1 KR 101652835B1
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KR
South Korea
Prior art keywords
oltc
unit
tap
electrical signal
tap selector
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KR1020160005739A
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Korean (ko)
Inventor
윤상현
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주식회사프로컴시스템
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    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/027—
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272—Apparatus, systems or circuits therefor
    • G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/333—Testing of the switching capacity of high-voltage circuit-breakers ; Testing of breaking capacity or related variables, e.g. post arc current or transient recovery voltage
    • G01R31/3333—Apparatus, systems or circuits therefor
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The present invention relates to an OLTC tap selector connection burnout monitoring apparatus, and more particularly, to an OLTC tap selector which is connected to an output unit of an OLTC to monitor a momentary electrical disturbance occurring during tap switching, To a burnout monitoring apparatus.

Description

[0001] The present invention relates to an OLTC tap selector connection burnout monitoring device,

The present invention relates to an OLTC tap selector connection burnout monitoring apparatus, and more particularly, to an OLTC tap selector which is connected to an output unit of an OLTC to monitor a momentary electrical disturbance occurring during tap switching, To a burnout monitoring apparatus.

Typical on-load tap changer (OLTC) is a device that adjusts the transformer ratio while it is installed inside the transformer and supplies the load.

This is a device that can reduce the variation of the secondary voltage by adjusting the transformer ratio of the primary winding of the transformer according to the variation of the voltage.

If the load on the power consumer increases and the voltage drop becomes severe, the power system can become a problem.

In this case, unlike a transformer equipped with a no load tap changer (NLTC), a transformer equipped with an on-load tap changer (OLTC) adjusts the voltage output to the secondary side Can be prevented.

That is, the variation of the secondary voltage can be reduced by adjusting the transformer primary winding ratio according to the variation of the voltage in the load state.

The main devices of the OLTC used for tap switching include the tap selector (TAP SELECTOR) and the DIVERTER SWITCH.

In the tap switching procedure, the tap selector mechanically connects to the desired tap, and the switch operates to electrically connect the selected tap with the main energizing circuit.

When the tap is switched, it should not be opened absolutely. Therefore, the short circuit is instantaneously short-circuited. When short-circuit occurs, an arc is generated momentarily and heat is generated in the coil.

As a result, the tap selection base unit is damaged due to the cumulative arc due to deterioration over time of use and erroneous operation of the switching system.

The tap selector of the damaged OLTC will cause electric disturbance such as instantaneous voltage drop, and continuous arc generation leads to the large power outage of the customer as well as the transformer fire.

On the other hand, a measurement test is periodically performed to measure electrical disturbance generated in the tap selector of the OLTC. At this time, a measurement test is generally performed using an oscilloscope or other measurement equipment.

However, by using such a measuring device to check, it is necessary to always accompany the inspection manpower, and there is a problem that not only the inspection workforce but also the measuring equipment must be provided, and the time required for the measurement becomes excessive.

In addition, there is a problem that the reliability of the measured values is reduced due to the simple repetitive manual operation using the measuring equipment. In contrast, there is a problem in that non-productive factors of manpower and time utilization occur due to trend management by counting.

Korean Patent Publication No. 10-2014-0041982 (April 4, 2014)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior arts, and it is an object of the present invention to provide a method and apparatus for measuring an electrical signal generated when an OLTC tap is switched, To identify the deterioration state and health of the OLTC easily.

In addition, by providing the OLTC tap selector connection burnout monitoring device, it is possible to maximize the efficiency of the manpower operation, to detect the abnormal symptom through the trend management in advance, to prevent the failure due to the improvement of the measurement accuracy and the deterioration, It is aimed to contribute greatly to stable operation.

In order to achieve the object of the present invention,

The OLTC tap selector connection burnout monitoring apparatus according to an embodiment of the present invention includes:

A power supply unit 100 configured to supply driving power,

A device status display unit 200 configured to display a driving ON / OFF status by the driving power supplied to the power supply unit 100,

An OLTC tap changeover contact portion 300 configured to be connected to the tap selector of the OLTC and configured such that the tap selector of the OLTC performs tap switching,

A secondary side voltage receiving unit 400 configured to be connected to an output unit of an on-load tap changer (OLTC) to receive a secondary side electrical signal,

An arithmetic and logic unit 500 configured to sample the secondary electrical signal received from the secondary voltage receiver 400 and to store sampled measurement information and to detect whether the OLTC is faulty,

A device setting input unit 600 configured to set a sampling range and a speed at the arithmetic unit 500,

A failure record storage unit 700 configured to generate failure record information on failure of the OLTC sensed by the arithmetic unit 500 and to store generated failure record information,

A monitoring display unit 800 configured to display measurement information measured by the calculation unit 500 and a power value for a secondary side electrical signal received by the secondary side voltage receiving unit 400,

An analyzing PC connection communicating unit 900 configured to transmit measurement information stored in the calculating unit 500 and failure record information stored in the failure record storing unit 700 to a manager analysis PC using wired or wireless data communication ), Thereby solving the problems of the present invention.

According to the present invention, there is provided an apparatus for monitoring the deterioration of the connection part of an OLTC tap selector, comprising: an electric signal generated during the switching of the OLTC tap to determine whether the tap connection part is burned out; The deterioration state and the soundness can be easily grasped.

In addition, by providing the OLTC tap selector connection burnout monitoring device, it is possible to maximize the efficiency of the manpower operation, to detect the abnormal symptom through the trend management in advance, to prevent the failure due to the improvement of the measurement accuracy and the deterioration, Thereby providing a significant contribution to stable operation.

1 is a block diagram of an apparatus for monitoring the connection of an OLTC tap selector connection unit according to an embodiment of the present invention.
FIG. 2 is a diagram showing an electric disturbance signal measurement of the connection failure monitoring apparatus for the connection of the OLTC tap selector according to the embodiment of the present invention.
3 is an electrical signal measurement diagram of an OLTC tap selector connection burnout monitoring apparatus according to an embodiment of the present invention.
4 is an electrical signal measurement diagram of an apparatus for detecting a breakdown of a connection part of an OLTC tap selector according to an embodiment of the present invention.
FIG. 5 is a comparative electrical signal measurement diagram of an apparatus for detecting burnout at a connection of an OLTC tap selector according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an OLTC tap selector connection breakage monitoring apparatus according to the present invention will be described in detail.

1 is a block diagram of an apparatus for monitoring the connection of an OLTC tap selector connection unit according to an embodiment of the present invention.

1, the OLTC tap selector connection burnout monitoring apparatus according to the present invention includes a power supply unit 100 configured to supply driving power,

A device status display unit 200 configured to display a driving ON / OFF status by the driving power supplied to the power supply unit 100,

An OLTC tap changeover contact part 300 configured to be connected to the tap selector of the OLTC and configured such that the tap selector of the OLTC performs tap switching,

A secondary side voltage receiving unit 400 configured to be connected to an output unit of an on-load tap changer (OLTC) to receive a secondary side electrical signal,

An arithmetic and logic unit 500 configured to sample the secondary electrical signal received by the secondary side voltage receiver 400 and to store sampled measurement information and to detect whether the OLTC is faulty;

A device setting input unit 600 configured to set a range and a speed to be sampled by the arithmetic unit 500,

A failure record storage unit 700 configured to generate failure record information on failure of the OLTC sensed by the arithmetic unit 500 and to store generated failure record information,

A monitoring display unit 800 configured to display measurement information measured by the calculation unit 500 and a power value for a secondary side electrical signal received by the secondary side voltage receiving unit 400,

An analyzing PC connection communicating unit 900 configured to transmit measurement information stored in the calculating unit 500 and failure record information stored in the failure record storing unit 700 to a manager analysis PC using wired or wireless data communication ).

And the driving power supplied to the power supply unit 100 is AC 220V.

At this time, the device status display unit 200 displays the driving status by the driving power supplied to the power supply unit 100, which indicates the ON / OFF status of the power.

The OLTC tap switching contact 300 is connected to any one of a tap selector (TAP SELECTOR) or a DIVERTER SWITCH which is a main device used for switching taps of an on-load tap changer (OLTC) .

In this case, the OLTC tap switching contact 300 controls the tap selector (TAP SELECTOR) included in the OLTC to switch the tap.

The secondary voltage receiver 400 is connected to the output of the OLTC and receives a secondary electrical signal. The tap selector (TAP SELECTOR) configured in the OLTC in the OLTC tap changeover contact 300 switches the tap And the tap selector is configured to receive an electrical signal due to burn-out of the tap connection portion when the tap switch is switched.

The calculating unit 500 is configured to sample the secondary side electrical signal received by the secondary side voltage receiver 400. The sampling unit 500 measures the secondary side electrical signal during the sampling, The tap selector (TAP SELECTOR) configured in the OLTC in the contact 300 controls tap switching, and when the tap selector switches the tap, disturbance of the electrical signal due to burnout of the tap connection can occur. And detects the occurrence of the abnormality.

In addition, the arithmetic operation unit 500 determines whether or not the on-load tap changer (OLTC) has failed by measuring a secondary electrical signal.

The apparatus setting input unit 600 is configured to set a range and a speed to be sampled by the arithmetic unit 500. For example, 60 cycles are set to 1 second, and 128 units per cycle And the sampling is set so as to perform sampling at 7,680 Hz per second.

In this regard, the arithmetic operation unit 500 monitors and measures voltage, current, electrical signal, and failure according to the set value of the device setting input unit 600.

The failure record storage unit 700 generates failure record information on the failure of the OLTC detected by the arithmetic unit 500. The failure record storage unit 700 converts the data information value to a database (DB) , And stores the failure record information including the date information value.

The monitoring display unit 800 is configured to display the measurement information measured by the calculation unit 500 and the power value of the secondary side electrical signal received by the secondary side voltage receiving unit 400. In addition, And displaying fault record information of the fault record storage 700, which is stored in the fault record storage unit 700, in response to the fault detected by the calculation unit 500. FIG.

The analysis PC connection communication unit 900 transmits the measurement information stored in the calculation unit 500 and the failure record information stored in the failure record storage unit 700 to the administrator analysis PC using wired or wireless data communication And further includes a power value for the secondary side electrical signal received by the secondary side voltage receiving unit 400, and further transmits the power value for the secondary side electrical signal.

The manager analysis PC is a PC (desktop PC, notebook, tablet PC, etc.) capable of general monitoring, and will not be described in detail with a general technology.

FIG. 2 is a diagram showing an electric disturbance signal measurement of the connection failure monitoring apparatus for the connection of the OLTC tap selector according to the embodiment of the present invention.

3 is an electrical signal measurement diagram of an OLTC tap selector connection burnout monitoring apparatus according to an embodiment of the present invention.

4 is an electrical signal measurement diagram of an apparatus for detecting a breakdown of a connection part of an OLTC tap selector according to an embodiment of the present invention.

FIG. 5 is a comparative electrical signal measurement diagram of an apparatus for detecting burnout at a connection of an OLTC tap selector according to an exemplary embodiment of the present invention.

2 to 5, the measurement information displayed on the monitoring display unit 800 in the configuration of the OLTC tap selector connection burnout monitoring apparatus according to the embodiment of the present invention is shown in FIGS. 2 to 5 As shown in FIG.

2 is a diagram showing an electric disturbance signal sensed and measured by the arithmetic unit 500. The OLTC tap selector 300 controls the tap selector to switch the OLTC tap. At this time, When the selector switches the tap, electrical disturbance may occur.

The arithmetic unit 500 senses the electrical disturbance signal, measures the electrical disturbance signal, and displays it on the monitor display unit 800.

FIG. 3 illustrates a state in which the OLTC tap selector switch 300 does not execute the tap-change control state of the OLTC tap selector, the controller 500 senses the switch state signal, And is displayed on the supervisory display unit 800.

FIG. 4 illustrates a state in which the OLTC tap selector switching unit 300 has performed the OLTC tap selector tap switching control, the operation unit 500 detects the tap switching state signal, 3 is compared with the pulse shown in FIG. 4, it can be seen that the pulse is kept constant in the state that the tap is not switched, and when the tap is switched, the pulse And the like.

In addition, the pulse shown in FIG. 2 detects the electrical disturbance state, and it is possible to grasp the tap switching state, but it can be seen that disturbance noise is generated.

FIG. 5 is a comparison of the contents shown in FIG. 2 to FIG. 4, which is consistent with the above description, so that a detailed description will be omitted.

In accordance with the above-described configuration, the OLTC tap selector selector burnout monitoring apparatus according to the present invention measures an electrical signal generated upon switching the OLTC tap to determine whether or not the tap connection section is burned, The deterioration state and soundness of the OLTC can be easily grasped.

In addition, by providing the OLTC tap selector connection burnout monitoring device, it is possible to maximize the efficiency of manpower operation, to detect abnormality through trend management in advance, to improve the accuracy of the measurement value and to prevent the failure due to deterioration, The present invention provides an effect that greatly contributes to stable operation of the apparatus.

The contents not described in the drawings should be understood by those skilled in the art based on the above description and should be included in the right of the present invention without being shown in the drawings.

It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is to be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive.

It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. .

100: Power supply
200: Device Status Indicator
300: OLTC tap switching contact part
400: secondary side voltage receiver
500:
600: Device setting input
700: Failure record storage unit
800: surveillance display unit
900: Analysis PC connection communication part

Claims (1)

An OLTC tap selector monitoring device comprising:
An OLTC tap switching contact part 300, a secondary side voltage receiving part 400, an arithmetic unit 500, a device setting input part 600 and a failure record storage part 700. The device status display part 200, the OLTC tap switching contact part 300, A monitoring display unit 800, a power supply unit 100 configured to supply driving power to the analysis PC connection communication unit 900,
A device status display unit 200 configured to display a driving ON / OFF status by the driving power supplied to the power supply unit 100,
An OLTC tap changeover contact part 300 configured to be connected to the tap selector of the OLTC and configured such that the tap selector of the OLTC performs tap switching,
A secondary side voltage receiver 400 connected to the output of the OLTC to receive a secondary side electrical signal,
The tap selector of the OLTC controls tap switching, and when the tab switch of the tap selector switches the tap, it judges occurrence of disturbance of the electrical signal and samples the secondary electrical signal received by the secondary voltage receiver 400 An arithmetic operation unit 500 for storing sampled measurement information and detecting whether or not the OLTC is faulted and for measuring a voltage and current, an electrical signal, and a failure according to a set value of the apparatus setting input unit 600; ,
A device setting input unit 600 configured to set a range and a speed to be sampled by the arithmetic unit 500,
A failure record storage unit (not shown) configured to generate failure record information on failure of the OLTC sensed by the arithmetic unit 500 and to store failure record information including a time at which the generated failure occurred and a date information value 700,
The measurement information measured by the arithmetic unit 500 and the power value of the secondary side electrical signal received by the secondary side voltage receiving unit 400 are displayed and the error detected by the calculating unit 500 A monitoring display unit (800) configured to display fault record information of the stored fault record storage unit,
And transmits the measurement information stored in the arithmetic unit 500 and the failure record information stored in the failure record storage unit 700 to the administrator analysis PC using wired or wireless data communication, And an analysis PC connection communicating unit 900 for transmitting the power value of the secondary electrical signal received by the analyzer PC 400 to the manager analysis PC.
KR1020160005739A 2016-01-18 2016-01-18 OLTC Tap selector connection burnout monitoring device KR101652835B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109541455A (en) * 2018-12-03 2019-03-29 国网江苏省电力有限公司南京供电分公司 A kind of OLTC impact characteristics extracting method based on S-transformation time-frequency spectrum SVD noise reduction
KR20220011050A (en) * 2020-07-20 2022-01-27 주식회사 원프레딕트 Method for failure detection of OLTC(on load tab changer) and apparatud for performing the same
KR20230119408A (en) 2022-02-07 2023-08-16 한국전력공사 Apparatus and Method for analysing operation state of On Load Tap Changer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101037323B1 (en) * 2010-12-30 2011-05-26 (주)엘레시스 Apparatus and method for evaluating health of tab changer
KR20140041982A (en) 2012-09-25 2014-04-07 한국전력공사 Apparatus for watching fault of on load tap changer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101037323B1 (en) * 2010-12-30 2011-05-26 (주)엘레시스 Apparatus and method for evaluating health of tab changer
KR20140041982A (en) 2012-09-25 2014-04-07 한국전력공사 Apparatus for watching fault of on load tap changer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109541455A (en) * 2018-12-03 2019-03-29 国网江苏省电力有限公司南京供电分公司 A kind of OLTC impact characteristics extracting method based on S-transformation time-frequency spectrum SVD noise reduction
KR20220011050A (en) * 2020-07-20 2022-01-27 주식회사 원프레딕트 Method for failure detection of OLTC(on load tab changer) and apparatud for performing the same
KR102459022B1 (en) 2020-07-20 2022-10-26 주식회사 원프레딕트 Method for failure detection of OLTC(on load tab changer) and apparatus for performing the same
KR20230119408A (en) 2022-02-07 2023-08-16 한국전력공사 Apparatus and Method for analysing operation state of On Load Tap Changer

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