WO2013100512A1 - 전력 변압기를 위한 부분방전 검출장치 - Google Patents
전력 변압기를 위한 부분방전 검출장치 Download PDFInfo
- Publication number
- WO2013100512A1 WO2013100512A1 PCT/KR2012/011360 KR2012011360W WO2013100512A1 WO 2013100512 A1 WO2013100512 A1 WO 2013100512A1 KR 2012011360 W KR2012011360 W KR 2012011360W WO 2013100512 A1 WO2013100512 A1 WO 2013100512A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- partial discharge
- power transformer
- discharge detection
- detection device
- metal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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Classifications
-
- 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
-
- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1254—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 of components, parts or materials of gas-insulated power appliances or vacuum gaps
-
- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- 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
- G01R31/40—Testing power supplies
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Definitions
- the present invention relates to a partial discharge detection device for a power transformer for detecting a partial discharge electromagnetic wave signal generated when an insulation abnormality.
- the partial discharge detection device for a general power transformer is installed in a state maintaining a constant insulation distance inside the power equipment to detect the partial discharge signal.
- the partial discharge detection device When the installation position of the partial discharge detection device is inside the drain valve of the transformer, the partial discharge detection device may be provided with sensors at various positions without additional inspection windows.
- FIG. 1 is a view showing a conventional partial discharge detection device.
- a conventional partial discharge detector 20 is installed in a drain valve.
- the partial discharge detection apparatus 10 has a form in which the signal input terminal 11 and the signal output terminal 13 are separately provided.
- the partial discharge signal is detected by the receiver 12a connected to the input and the receiver 12b connected to the output in the form of a parallel coupler.
- a frequency band generated during partial discharge is generated in a wide band, but in order to detect a signal, a signal in a 0.3 to 1.5 GHz band is detected among the UHF bands (0.3 to 3 GHz) that are less affected by noise.
- Broadband characteristics are required to receive signals in a wide frequency band of the UHF band. It is not possible to have a broadband in a single shape and in the same shape because physically the wavelength length is dependent, and a receiver having multiple wavelength lengths must be designed.
- the present invention provides a partial discharge detection device for a power transformer for detecting a partial discharge signal generated due to an abnormality in the power voltage transformer through a plurality of divided bands.
- the present invention relates to a partial discharge detection device for a power transformer, comprising: an antenna unit for receiving electromagnetic waves; an insulation seal including the antenna; a metal seal connected to the insulation seal; and an antenna and a coaxial cable And a metal handle portion sealing the connector and a coaxial cable drawn out of the metal handle portion.
- the insulation sealing part may include from the antenna part to an inner conductor contact part of the drain valve.
- the sum of the length of the insulation sealing part and the length of the metal sealing part excluding the length of the antenna part in the drain valve length may be proportional to the wavelength of the resonance frequency.
- the antenna unit may receive a divided frequency consisting of a plurality of divided signal bands among the reception frequency bands for detecting the partial discharge signal of the power transformer.
- It may be further connected to the coaxial cable, and may further include a measuring unit for measuring the electromagnetic wave received from the antenna.
- the partial discharge detection device can receive signals of a wide frequency band through a plurality of divided bands.
- the partial discharge detection device may be implemented to detect signals of frequency bands having different wavelengths for each divided band.
- the present invention can improve the performance of the antenna by using the conductor characteristics inside the drain valve that the antenna other than the antenna is mounted.
- 1 is a view for explaining a conventional partial discharge detection device.
- FIG. 2 is a view showing the longitudinal cross-sectional structure of the partial discharge detection apparatus according to an embodiment of the present invention.
- FIG. 3 is an exemplary diagram for describing a resonance frequency and an equivalent wavelength length of an antenna in a partial discharge detection apparatus according to an exemplary embodiment of the present invention.
- FIG. 4 is a view showing in detail the structure of the grounding structure and the metal handle portion shown in FIG.
- An embodiment of the present invention relates to a transformer diagnostic system using partial discharge detection in an ultra high frequency (UHF) band.
- UHF ultra high frequency
- the antenna unit included in the drain valve is sealed with an insulation seal. Due to the sum of the drain valve length excluding the length of the antenna portion and the length of the conductor boundary by the metal seal, the antenna portion sealed with the insulation seal increases the bandwidth of the antenna due to the periodic resonance by the E-field distribution inside the valve. do.
- FIG. 2 is a view showing the longitudinal cross-sectional structure of the partial discharge detection apparatus according to an embodiment of the present invention.
- the partial discharge detection apparatus 200 may be installed in the drain valve 260 of the upper or lower portion of the power transformer 210.
- the partial discharge detection device 200 may be linked with the partial discharge signal processing device 240 through the N-type connector 220 and the coaxial cable 230.
- the partial discharge detection apparatus 200 includes an antenna unit 201 for detecting a signal of a plurality of divided multi-bands in order to detect a partial discharge signal band (0.5 to 1.5 GHz, UHF band) generated from the power transformer. can do.
- a partial discharge signal band 0.5 to 1.5 GHz, UHF band
- the antenna unit 201 of the partial discharge detection apparatus 200 may include a plurality of divided bands of the partial discharge signal band (for example, four frequency bands: a first band (0.5 to 0.75 GHz) and a second band (0.75 to 1.00 GHz).
- the wavelengths of the antennas may be different from each other so as to be classified according to the third band (1.00 to 1.25 GHz) and the fourth band (1.25 to 1.5 GHz).
- the antenna unit 201 receives a divided frequency consisting of a plurality of divided signal bands for detecting the partial discharge signal of the power transformer in the frequency band.
- the antenna unit 201 of the partial discharge detection apparatus 200 may detect electromagnetic waves due to the partial discharge.
- the detected electromagnetic wave may be transmitted to the measuring device 240 through the insulator 202 including the antenna unit 201, the metal seal 203, the metal handle 206, and the coaxial cable 230.
- the specific structure of the ground structure and the metal handle 206 is as shown in FIG.
- the measuring device 240 is connected to the partial discharge detection device 200 by a coaxial cable, and measures the intensity of electromagnetic waves detected by the antenna unit 201. Based on the measurement result, it may be determined whether partial discharge occurs in the power transformer 210.
- the antenna unit 201 may determine the resonance frequency and the bandwidth according to the size. In addition, it may be determined according to the length of the inner conductor of the drain valves 260 and 250 to which the insulation sealing part 202 other than the antenna part 201 is mounted, and the length of the longitudinal direction of the conductor boundary by the metal sealing part.
- the insulating seal 202 may be configured in the form of a sealed container such as a pipe to include the antenna unit 201.
- the insulation seal 202 includes an antenna unit 201.
- the insulation seal may be configured to extend to the inner conductor contact surface of the drain valves 260 and 250.
- the partial discharge detection apparatus 200 for a power transformer may include a single pipe flange 204 such that an antenna unit 201 having a large size may be attached to the drain valves 250 and 260. have.
- the drain valve when installing the sensor to the power transformer, the drain valve is locked to prevent leakage of the insulating oil.
- the size of the antenna portion can be restricted to the size that can be mounted between the drain valve and the flange.
- the flange may be formed in a single tube shape to increase the space between the drain valve and the flange to increase the size of the antenna unit.
- the partial discharge detection apparatus 200 maintains an insulation distance by separating the shield wire of the antenna cable 205 and the conductor pipe 203 for the E-field distribution inside the drain valve and the conductor pipe. It may include a structure (grounding part, 207) for the shield wire and the conductor pipe at the end of the conductor pipe.
- the partial discharge detection apparatus 200 may include a structure of a metal handle 206 to seal the connector portion connecting the metal sealing portion and the coaxial cable and to cover the waterproof tube so that the measurement can be performed at all times.
- the metal handle 206 is a structure for sealing the connector 220 connecting the metal sealing part and the coaxial cable 230. If the cap of the metal handle 206 is removed, the coaxial cable can be connected, and if the waterproof tube is put on the handle structure, the measurement can be performed at all times.
- FIG. 3 is an exemplary diagram for describing a resonance frequency and an equivalent wavelength length of an antenna in a partial discharge detection apparatus according to an exemplary embodiment of the present invention.
- (a) to (d) are wavelengths ⁇ according to the resonance frequency f of the sum of the lengths of the insulation sealing part 202 and the metal sealing part 203 excluding the length of the antenna part 201. ). That is, (a) to (d) is an insulating sealing part by a predetermined length d1 of the total length d1 + d2 of the insulating sealing part 202 and the metal sealing part 203 excluding the length of the antenna part 201.
- the wavelength ⁇ is shown. That is, the length d1 of the insulation pipe (insulation seal) can be determined as "drain valve length-antenna portion length (effective length)".
- d2 is the length of the conductor pipe (metal sealing part).
- (a) is the resonance frequency when the insulation sealing part 202 is included in the insulation sealing part 202 by the length d1 of the total length d1 + d2 of the metal sealing part 203 and the metal sealing part 203 except for the length of the antenna part 201.
- (f1) is 0.58 GHz
- the length of d1 + d2 and the length of the wavelength may be the same.
- (b) is the resonance frequency when the insulation sealing part 202 excluding the length of the antenna part 201 and the insulation sealing part 202 is included in the insulation sealing part 202 by the length d1 of the total length d1 + d2 of the metal sealing part 203.
- (f2) is 0.84 GHz, it may have a wavelength length of 1.5 times d1 + d2.
- (c) is a resonance frequency when the insulation sealing part 202 excluding the length of the antenna part 201 is included in the insulation sealing part 202 by the length d1 of the total length d1 + d2 of the metal sealing part 203 and the metal sealing part 203.
- (f3) is 1.125 GHz, it may have a wavelength length twice that of d1 + d2.
- (d) is the resonance frequency when the insulation sealing part 202 excluding the length of the antenna part 201 is included in the insulation sealing part 202 by the length d1 of the total length d1 + d2 of the metal sealing part 203 and the metal sealing part 203.
- (f2) is 1.37 GHz, it may have a wavelength length of 2.5 times d1 + d2.
- the phase by d1 may be defined as ⁇ 1 d1 ( ⁇ 1: propagation constant of medium 1)
- the phase by d2 may be defined as ⁇ 2 d2 ( ⁇ 2: propagation constant of medium 2).
- the characteristics of the broadband frequency can be improved.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Description
Claims (8)
- 전자파를 수신하는 안테나부;상기 안테나부를 포함하고 동축케이블을 보호하고 있는 절연 밀폐부;상기 절연 밀폐부와 연결되고 금속 손잡이부를 연결하는 금속 밀폐부;상기 금속 밀폐부와 동축 케이블을 연결하고 있는 커넥터를 밀봉하는 금속 손잡이부; 및상기 금속 밀폐부의 외부로 인출되는 동축 케이블;을 포함하는전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 절연 밀폐부는상기 안테나부로부터 드레인 벨브 내부 도체 접촉부를 연결하는전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 안테나부의 길이를 제외한 상기절연 밀폐부(d1)와 상기 금속 밀폐부(d2)의 총 길이(d1+d2)가 공진 주파수에 대한 파장길이와 비례하는,전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 안테나부는주파수 대역 중 전력변압기의 부분 방전 신호를 검출하기 위한 분할된 다수의 신호대역으로 이루어진 분할 주파수를 수신하는전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 동축케이블로 연결되며, 상기 안테나에서 수신된 전자파를 측정하는 측정부를 더 포함하는전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 안테나부의 취부를 위한 단관 형태의 플렌지를 더 포함하는,전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 안테나부와 금속 손잡이부의 커넥터를 연결하는 동축케이블의 쉴드선이 금속밀패부 끝부분인 금속 손잡이 부에서 접촉하는전력변압기를 위한 부분방전 검출장치.
- 제1항에 있어서,상기 안테나부와 금속 손잡이부의 커넥터를 연결하는 동축케이블이 절연 밀폐부 및 금속 밀폐부 내부에서 중심(or 이격거리)을 유지하기 위한 절연 지지대를 포함하는,전력변압기를 위한 부분방전 검출장치.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/368,442 US9726708B2 (en) | 2011-12-26 | 2012-12-24 | Device for detecting partial discharge for power transformer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2011-0142151 | 2011-12-26 | ||
| KR1020110142151A KR101251876B1 (ko) | 2011-12-26 | 2011-12-26 | 전력 변압기를 위한 부분방전 검출장치 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013100512A1 true WO2013100512A1 (ko) | 2013-07-04 |
Family
ID=48442566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2012/011360 Ceased WO2013100512A1 (ko) | 2011-12-26 | 2012-12-24 | 전력 변압기를 위한 부분방전 검출장치 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9726708B2 (ko) |
| KR (1) | KR101251876B1 (ko) |
| WO (1) | WO2013100512A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399262A (zh) * | 2013-07-20 | 2013-11-20 | 北京航空航天大学 | 基于光纤马赫曾德干涉仪的电力变压器局部放电检测系统及检测方法 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10145830B2 (en) * | 2015-12-10 | 2018-12-04 | Roger Alan FENTON | Monitoring power devices |
| KR101923134B1 (ko) * | 2016-12-26 | 2018-11-28 | 효성중공업 주식회사 | 변압기 내부결함 검출장치 |
| JP2018194516A (ja) * | 2017-05-22 | 2018-12-06 | 三菱電機株式会社 | 試験方法および試験装置 |
| WO2020160590A1 (en) * | 2019-02-05 | 2020-08-13 | Aurtra Pty Ltd | A sensor for transformer condition assessment |
| US11996619B2 (en) * | 2019-11-07 | 2024-05-28 | Qatar Foundation For Education, Science And Community Development | Antenna device and a detecting device having the same |
| CN112444711A (zh) * | 2020-12-09 | 2021-03-05 | 电子科技大学 | 一种基于电磁辐射的igbt并行系统健康评估方法 |
| CN113419150B (zh) * | 2021-07-15 | 2022-07-01 | 贵州电网有限责任公司 | 一种基于电磁复合的故障绝缘子在线检测装置及检测方法 |
| CN113419149B (zh) * | 2021-07-15 | 2022-07-01 | 贵州电网有限责任公司 | 一种故障绝缘子在线检测装置及检测方法 |
| KR102792186B1 (ko) * | 2023-02-21 | 2025-04-08 | 에이치디현대일렉트릭 주식회사 | 변압기의 부분방전 센싱장치 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010112722A (ko) * | 2000-06-12 | 2001-12-21 | 이계안 | 자동차의 차체보강구조 |
| KR20080004375A (ko) * | 2006-07-04 | 2008-01-09 | 주식회사 효성 | 가스 절연기기의 부분방전 검출장치 |
| KR20110075681A (ko) * | 2009-12-28 | 2011-07-06 | 주식회사 효성 | 전력 변압기를 위한 부분방전 검출장치 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075629A (en) * | 1989-05-11 | 1991-12-24 | Kabushiki Kaisha Toshiba | Partial discharge detecting device for electrical equipments |
| US5272525A (en) * | 1991-03-07 | 1993-12-21 | Recoton Corporation | System for local wireless transmission of signals at frequencies above 900 MHz |
| WO1998053334A1 (en) | 1997-05-21 | 1998-11-26 | Hitachi, Ltd. | Partial discharge detector of gas-insulated apparatus |
| NL1005721C2 (nl) * | 1997-04-03 | 1998-10-07 | Kema Nv | Werkwijze en inrichting voor het detecteren van partiële ontladingen. |
| AUPQ260599A0 (en) * | 1999-09-02 | 1999-09-23 | Transgrid | Partial discharge monitoring system for transformers |
| JP2002022790A (ja) * | 2000-07-04 | 2002-01-23 | Hitachi Ltd | ガス絶縁機器の部分放電検出装置 |
| AUPQ975100A0 (en) * | 2000-08-29 | 2000-09-21 | Siemensindustrial Services Ltd | Re-locatable partial discharge transducer head |
| FR2851852B1 (fr) * | 2003-02-27 | 2005-04-01 | Alstom | Antenne pour detecter des decharges partielles dans une cuve d'appareillage electrique |
| WO2006019164A1 (ja) * | 2004-08-20 | 2006-02-23 | Kabushiki Kaisha Toshiba | 回転電機の部分放電検出装置および検出方法 |
-
2011
- 2011-12-26 KR KR1020110142151A patent/KR101251876B1/ko active Active
-
2012
- 2012-12-24 US US14/368,442 patent/US9726708B2/en active Active
- 2012-12-24 WO PCT/KR2012/011360 patent/WO2013100512A1/ko not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010112722A (ko) * | 2000-06-12 | 2001-12-21 | 이계안 | 자동차의 차체보강구조 |
| KR20080004375A (ko) * | 2006-07-04 | 2008-01-09 | 주식회사 효성 | 가스 절연기기의 부분방전 검출장치 |
| KR20110075681A (ko) * | 2009-12-28 | 2011-07-06 | 주식회사 효성 | 전력 변압기를 위한 부분방전 검출장치 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399262A (zh) * | 2013-07-20 | 2013-11-20 | 北京航空航天大学 | 基于光纤马赫曾德干涉仪的电力变压器局部放电检测系统及检测方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101251876B1 (ko) | 2013-04-12 |
| US20140347091A1 (en) | 2014-11-27 |
| US9726708B2 (en) | 2017-08-08 |
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