EP2839490A1 - Method for monitoring an on-load tap changer - Google Patents
Method for monitoring an on-load tap changerInfo
- Publication number
- EP2839490A1 EP2839490A1 EP13709921.4A EP13709921A EP2839490A1 EP 2839490 A1 EP2839490 A1 EP 2839490A1 EP 13709921 A EP13709921 A EP 13709921A EP 2839490 A1 EP2839490 A1 EP 2839490A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- time
- current
- diverter switch
- tap changer
- synchronization
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 description 8
- 230000004069 differentiation Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H2009/0061—Monitoring tap change switching devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
Definitions
- the invention relates to a method for monitoring a tap changer, which is used for uninterrupted switching between taps of a tapped transformer.
- Tap changers have been used worldwide for many years to continuously switch between different winding taps of high-speed tap-changers.
- Such tap changer according to the present invention consist of a selector for powerless selection of the respective winding tap of the
- the jump-like switching also called Lastumschaltersprung, is usually carried out with the aid of a force accumulator, when its triggering a switching shaft is rotated quickly.
- the diverter switch also usually has
- the switching contacts serve for direct connection of the respective winding tap with the load dissipation, the
- Resistor contacts for short-time wiring d. H. Bridging by means of one or more switching resistors.
- Such a method is known from DE 197 44 465 C1, which forms the preamble of claim 1 of the present invention.
- the torque is detected on the drive motor during operation of the tap changer, at the same time there is a position detection of the respective current positions of
- the triggering time of the energy accumulator which in turn triggers the sudden movement of the diverter switch used.
- This triggering of the force accumulator as well as the subsequent diverter switch jump represent a typical, fast-running and thus easily detectable and a short time associated result at each actuation of the tap changer.
- Evaluation window determined.
- the detected torque curve is differentiated in a changeover, subsequently determined the minimum of the differentiated torque curve and the time of the thus determined minimum as the time of
- Lastumschaltersprungs are not excluded. This results in a significant dispersion, which prevents reliable synchronization.
- the object of the invention is to provide an advanced method for monitoring a tap changer, which allows a simple and reliable way to determine the triggering time of the energy storage and thus the Lastumschaltersprunges and thus allows reliable synchronization.
- the general inventive idea is to change the load current, i. the current at the tap changer to use during a load switching for the determination of a synchronizing pulse.
- this change in current is reproduced by means of a sliding effective value formation and subsequent differentiation of the effective value. Subsequently, the maximum value of the differentiated effective value of the current is determined; the time of its occurrence, i. of the maximum amount, is the time of Lastumschaltersprungs, ie the triggering time of the energy storage, assigned as and
- Triggering time according to the so-called window technique, which is described in detail in DE 97 46 574 C1, determine the position of each Fester and thus conclusions about the function of the individual modules of the tap changer, such as preselector or Turns, fine selectors or diverter switch, which are operated sequentially with each load switching in a specific sequence.
- a particular advantage of the invention is that from the continuous recording of the current load switching when the transformer is switched directly from the changing current can be determined during a switch and thus is independent of mechanical influences. Furthermore, it is advantageous that even with a manual operation of the tap changer, i. when cranking operation without electrically moving motor drive, the inventive method can be applied. This is not possible in the prior art.
- Fig. 1 The schematic flowchart of a method according to the invention
- Fig. 2 The typical current flow and the corresponding gradients after the
- the position detection of the tap changer i. its relative position over time t during complete switching. From this it can be deduced in which current position the individual subassemblies, such as preselector, selector, and diverter switch, are within the total to be traversed
- This position detection is particularly advantageous by means of a resolver, which allows continuous detection.
- the torque of the tap changer associated drive motor is detected during the operation. This can be determined in a particularly simple manner, for example by detecting the rms value of the current and the voltage of the drive motor assigned to the tap changer, in order to determine the active power in a manner known per se in order to calculate the corresponding torque in turn. Subsequently, a storage of the values of the current I at the diverter switch determined over the time t takes place.
- the effective value leff of the current I at the diverter switch is formed. This is done continuously.
- Lastumschaltersprunges t LU ie the triggering time of the energy storage defined. This determines a unique synchronization time. The synchronization will be
- Each window is defined by the period of operation of the preselector, the selector or the diverter switch, each of which is limited by two characteristic times, the "window" Timing start and end of the window: t 0 - 1,, ..., t syn -tn- Each of these windows is preceded by
- Comparison method can be not only a deviation of the actual torque from the setpoint values and thus detect an error, but it can also be a occurring error of a particular module that has caused him to assign in order to draw conclusions about the function of the individual modules of the tap-changer, like
- Load switching in a particular sequence are operated sequentially.
- Fig. 2 shows a schematic representation of the corresponding courses during a changeover. Shown is first the respective current I at the diverter switch, its upper limit l g . This current I is first subjected to RMS; the respective resulting effective value Ieff is shown greased. At one time, the diverter switch LU is actuated, the actual load switching begins. After a certain period of time then begins the actual electrical switching between the
- the rms value of the current lef l is compared with the rms value of the current Ieff 2 after the time t 2 before the time t 2 . If the two effective values leffl and Ieff2 clearly differ, this is considered an indication of a proper load switching and the determined time t 2 is taken as the time of the diverter switch jump t L u and is used for synchronization. If this is not the case, it is assumed that no load switching may have taken place. This suggests possible network disturbances; in such a case, no synchronization takes place, since the underlying time t 2 in such a case is inaccurate and does not represent a time of load switching.
- the time of a load changeover can thus be determined very accurately when the transformer is switched on; He is also independent of mechanical influences.
- Another advantage of the method according to the invention is that it can also be used in manual cranking operation, ie without electrically moving motor drive.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electric Motors In General (AREA)
- Protection Of Transformers (AREA)
- Housings And Mounting Of Transformers (AREA)
- Motor And Converter Starters (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Stepping Motors (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Control Of Ac Motors In General (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012103261 | 2012-04-16 | ||
PCT/EP2013/055539 WO2013156233A1 (en) | 2012-04-16 | 2013-03-18 | Method for monitoring an on-load tap changer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2839490A1 true EP2839490A1 (en) | 2015-02-25 |
EP2839490B1 EP2839490B1 (en) | 2016-03-16 |
Family
ID=47891730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13709921.4A Active EP2839490B1 (en) | 2012-04-16 | 2013-03-18 | Method for monitoring a step switch |
Country Status (12)
Country | Link |
---|---|
US (1) | US9189000B2 (en) |
EP (1) | EP2839490B1 (en) |
JP (1) | JP6117338B2 (en) |
KR (1) | KR102048324B1 (en) |
CN (1) | CN104246948B (en) |
DE (1) | DE102013102709B4 (en) |
ES (1) | ES2576352T3 (en) |
HK (1) | HK1202980A1 (en) |
RU (1) | RU2629566C2 (en) |
UA (1) | UA112794C2 (en) |
WO (1) | WO2013156233A1 (en) |
ZA (1) | ZA201406511B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012103736A1 (en) * | 2012-04-27 | 2013-10-31 | Maschinenfabrik Reinhausen Gmbh | Method for monitoring the operation of a tap changer |
AT516005B1 (en) * | 2014-07-02 | 2016-11-15 | Omicron Electronics Gmbh | Method and device for testing a tap changer of a transformer |
AT516004B1 (en) * | 2014-07-02 | 2017-04-15 | Omicron Electronics Gmbh | Method and device for testing a tap changer of a transformer |
AT515960B1 (en) * | 2014-07-02 | 2016-08-15 | Omicron Electronics Gmbh | Method and device for testing a tap changer of a transformer |
CN104658823B (en) * | 2015-02-09 | 2017-06-06 | 广州供电局有限公司 | With permanent magnet mechanism circuit-breaker and its speed-regulating control device and method |
CN106597058B (en) * | 2016-11-22 | 2019-01-29 | 深圳职业技术学院 | A kind of distribution system electric equipment switch state and the method for distance and position judgement |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6139818A (en) * | 1984-07-30 | 1986-02-26 | 三菱電機株式会社 | Device for monitoring operation of transformer on-load tap changer |
SU1686529A1 (en) * | 1989-03-06 | 1991-10-23 | Предприятие П/Я Р-6062 | Device for intercontact gap control of electromagnetic commutative engine |
JPH09232159A (en) * | 1996-02-27 | 1997-09-05 | Mitsubishi Electric Corp | On-load tap switching-over device |
DE19707528C1 (en) * | 1997-02-25 | 1998-08-13 | Reinhausen Maschf Scheubeck | Position indicator |
DE19744465C1 (en) | 1997-10-08 | 1999-03-11 | Reinhausen Maschf Scheubeck | Means for regulation of a multi-contact switch for tapped transformer |
DE19746574C1 (en) | 1997-10-22 | 1999-02-04 | Reinhausen Maschf Scheubeck | Method of functional monitoring of step switches |
CA2258223A1 (en) * | 1999-01-22 | 2000-07-22 | Hydro-Quebec | Vibroacoustic signature handling process in a high voltage electromechanical switching system |
DE19907834C1 (en) * | 1999-02-24 | 2000-05-18 | Reinhausen Maschf Scheubeck | Monitoring method for step switches involves selecting characteristic motor torque values for identical times in two switching processes, and comparing corresponding switch torques with limits |
DE10003918C1 (en) * | 2000-01-29 | 2001-07-05 | Reinhausen Maschf Scheubeck | Monitoring step switch contact burning involves deriving contact burning rates from switching currents, summing, converting to contact thickness, comparing with stored limit values |
RU2199788C2 (en) * | 2000-09-18 | 2003-02-27 | Акционерное общество закрытого типа "Контактор" | Device testing serviceability of ac overcurrent protection |
GB2424766B (en) * | 2005-03-31 | 2007-06-27 | Areva T & D Sa | An on-load tap changer |
WO2008024068A1 (en) * | 2006-08-25 | 2008-02-28 | Abb Research Ltd. | A drive system for a tap changer |
CN200950387Y (en) * | 2006-09-26 | 2007-09-19 | 上海华明电力设备制造有限公司 | On-load tap-changer with manual gear shift mechanism |
CN101197207B (en) * | 2006-12-06 | 2010-04-21 | 中国科学院电工研究所 | Non-combustible on-load tap-switch |
JP2009043474A (en) | 2007-08-07 | 2009-02-26 | Panasonic Corp | Power supply device |
DE102010033195B3 (en) | 2010-08-03 | 2011-11-10 | Maschinenfabrik Reinhausen Gmbh | Method for monitoring a tap changer |
-
2013
- 2013-03-18 RU RU2014145871A patent/RU2629566C2/en active
- 2013-03-18 US US14/382,472 patent/US9189000B2/en active Active
- 2013-03-18 WO PCT/EP2013/055539 patent/WO2013156233A1/en active Application Filing
- 2013-03-18 EP EP13709921.4A patent/EP2839490B1/en active Active
- 2013-03-18 ES ES13709921.4T patent/ES2576352T3/en active Active
- 2013-03-18 JP JP2015506145A patent/JP6117338B2/en not_active Expired - Fee Related
- 2013-03-18 CN CN201380020229.5A patent/CN104246948B/en active Active
- 2013-03-18 KR KR1020147032013A patent/KR102048324B1/en active IP Right Grant
- 2013-03-18 UA UAA201411209A patent/UA112794C2/en unknown
- 2013-03-18 DE DE102013102709.1A patent/DE102013102709B4/en not_active Expired - Fee Related
-
2014
- 2014-09-04 ZA ZA2014/06511A patent/ZA201406511B/en unknown
-
2015
- 2015-03-31 HK HK15103257.5A patent/HK1202980A1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2013156233A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013102709A1 (en) | 2013-10-17 |
CN104246948A (en) | 2014-12-24 |
JP6117338B2 (en) | 2017-04-19 |
KR20150008113A (en) | 2015-01-21 |
ZA201406511B (en) | 2015-11-25 |
UA112794C2 (en) | 2016-10-25 |
CN104246948B (en) | 2017-03-15 |
DE102013102709B4 (en) | 2015-04-16 |
JP2015516793A (en) | 2015-06-11 |
ES2576352T3 (en) | 2016-07-07 |
EP2839490B1 (en) | 2016-03-16 |
RU2014145871A (en) | 2016-06-10 |
KR102048324B1 (en) | 2019-11-25 |
US20150153749A1 (en) | 2015-06-04 |
HK1202980A1 (en) | 2015-10-09 |
RU2629566C2 (en) | 2017-08-30 |
WO2013156233A1 (en) | 2013-10-24 |
US9189000B2 (en) | 2015-11-17 |
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