EP3963615A1 - Method for carrying out a switchover of a switch, and drive system for a switch - Google Patents
Method for carrying out a switchover of a switch, and drive system for a switchInfo
- Publication number
- EP3963615A1 EP3963615A1 EP20721213.5A EP20721213A EP3963615A1 EP 3963615 A1 EP3963615 A1 EP 3963615A1 EP 20721213 A EP20721213 A EP 20721213A EP 3963615 A1 EP3963615 A1 EP 3963615A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- switch
- value
- switching
- drive
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000015654 memory Effects 0.000 claims description 7
- 230000006870 function Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H01H9/0027—Operating mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
- H01H2003/266—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor having control circuits for motor operating switches, e.g. controlling the opening or closing speed of the contacts
-
- 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
Definitions
- the invention relates to a method for switching over a switch by means of a drive system.
- the invention further relates to a drive system for a switch which comprises at least one motor which acts on a drive shaft.
- a drive for an on-load tap-changer is, for example, known from the German utility model DE 20 2010 01 1 521 U1.
- This on-load tap-changer drive has a motor that is rigidly connected to the corresponding on-load tap-changers via a linkage.
- the motor is operated by means of wiring, i.e. by actuating motor contactors that switch the motor on and off.
- the on-load tap-changers are then operated via the drive shaft. After assembling the switch, very little can be changed on the drive. This makes the drive rigid and inflexible. Even simple adjustments require complex conversion measures.
- On-load tap-changers are usually used to regulate voltage in different transformers.
- a drive system is used to operate the on-load tap-changer.
- a motor arranged on the transformer housing is connected to the on-load tap-changer via a linkage.
- the motor is supplied with energy by actuating electromechanical contactors.
- the motor is operated in such a way that its drive shaft rotates either in one direction or the other.
- the current position or position of the on-load tap-changer is not checked before switching. It is always assumed that the on-load tap-changer has not changed its position since the last switch.
- a further object of the invention is to provide a drive system for a switch for performing a switchover from a current switch position to a target switch position, which ensures a precise and reliable change from one switch position to a subsequent switch position.
- a drive system for carrying out a switchover of a switch from a current switch position to a target switch position which includes the features of claim 8.
- the method according to the invention for carrying out a switchover of a switch from a current switch position to a target switch position by means of a drive system is characterized in that a switching signal is initially received by the drive system from a control device. At least one value of a first position of a drive shaft of the drive system is then determined via a feedback signal of a feedback system. Likewise, a value of a second position of the drive shaft is determined by the control device based on the target switch position to be approached. A difference between the value of the first position and the value of the second position of the drive shaft is determined by the control device. Finally, the control device acts as a function of the feedback signal on the motor until the value of the second position of the drive shaft is reached and the switchover from the current switch position to a target switch position is completed.
- the method according to the invention has the advantage that the switchover from a current switch position to a target switch position can be carried out reliably. Changes over time in the drive system for a switch can also be taken into account with the method according to the invention.
- this value of the first position of the drive shaft can be compared with the value of the position of the drive shaft of the last target switching position reached.
- the last target switch position approached corresponds to the current switch position from which the switchover is to take place. If it is now found that the value of the first position of the drive shaft for the current switch position and the value of the position of the drive shaft of the last target switch position reached do not match, the control device acts on the motor depending on the feedback signal until the value the position of the drive shaft of the last switched position is reached.
- the method it is also possible, after the determination of the value for the first position of the drive shaft, to check via the feedback signal of the feedback system whether the first position is in a predefined tolerance range.
- the tolerance range can include several positions of the drive shaft around the current switch position.
- the switch is preferably switched from a current switch position to the target switch position in such a way that a switching step has the value +1 or -1. This means that a switch is made to the next lower or next higher switch position.
- the position of the drive shaft is recorded by an encoder system that is part of the feedback system.
- the encoder system is directly or indirectly coupled to the drive shaft.
- An assignment of switch positions of the switch and values for the position of the drive shaft can be stored in a memory of the control device.
- the drive system according to the invention for a switch to carry out a circuit from a current switch position to a target switch position is characterized in that a drive shaft is provided which connects the drive system to the switch.
- a motor is used to drive the drive shaft.
- a control device generates the switching signals for the drive system.
- a feedback system which is functionally assigned to the drive shaft and connected to a power section of the drive system, is set up to determine a value of a first position of a drive shaft of the drive system.
- a feedback signal can be generated based on this position.
- a control unit of the control device which is connected to the power section, is set up to operate the motor as a function of a switching signal and the feedback signal until the target switching position is reached.
- control unit or the control device comprises a memory.
- the power section is used to supply the motor with energy.
- An assignment of the switch positions and values for the position of the drive shaft are stored in the memory.
- the feedback system includes an encoder system that is directly or indirectly coupled to the drive shaft.
- the encoder system can be an absolute encoder, a multi-turn absolute encoder, a single-turn encoder, a virtual encoder or a virtual encoder with at least one auxiliary contact.
- the improved concept is based on the idea that before a switch is actuated, i.e. after a switch signal has been received, the position of the drive shaft is used to check where it is located and has moved accordingly since the last switch. It is therefore checked whether the switch has moved away from the position last approached between the last shift and the next shift.
- the switch has been switched from a certain position to another certain position, for example a step position, but rather whether mechanical parts have moved a few degrees, for example due to vibrations.
- the value for the first position of the drive shaft is determined.
- the second value is assigned to a certain position of the switch.
- the value for the second position of the drive shaft corresponds to a tap position of the on-load tap-changer.
- Figure 1 is a schematic representation of an embodiment of a switch with a drive system according to the invention
- Figure 2 is a schematic representation of the switch with the individual switching positions that can be approached with the motor;
- FIG. 3 shows a schematic representation of the various positions of the movement of the drive shaft in order to move from one switching position to the next;
- Figure 4 is a schematic representation of a possible embodiment of a
- FIG. 5 shows a process sequence for operating a switch, in particular an on-load tap-changer, according to the invention.
- FIG. 6 shows a further process sequence for the actuation of a switch, in particular an on-load tap-changer, according to the invention.
- FIG. 1 shows a schematic representation of an exemplary embodiment of a switch arrangement 1 with a switch 17 and a drive system 3 which is connected to the switch 17 via a drive shaft 16.
- the switch 17 can be an on-load tap-changer, diverter switch, selector, double turner, reverser, preselector, circuit breaker, load switch or disconnector.
- the drive system 3 includes a motor 12 which can drive the drive shaft 16 via a motor shaft 14 and, optionally, via a gear 15.
- a control device 2 of the drive system 3 comprises a power unit 1 1, which contains, for example, a converter (not shown) for the controlled or regulated supply of energy to the motor 12 and a control unit 10 to control the power unit 1 1, for example via a bus 19.
- the drive system 3 has a feedback system 4 which is functionally assigned to the drive shaft 16.
- the feedback system 4 can be a transmitter system 13.
- the transmitter system 13 can also be part of the feedback system 4.
- the feedback system 4 or the transmitter system 13 is connected to the power unit 11.
- the encoder system 13 is coupled directly or indirectly to the drive shaft 16.
- the encoder system 13 is set up to detect a first value for a position PI, such as an angular position, in particular an absolute angular position, of the drive shaft 16.
- the encoder system 13 can include, for example, an absolute encoder, in particular a multi-turn absolute encoder, single-turn encoder, which is located on the drive shaft 16, the motor shaft 14 or another shaft, the position of which is clearly linked to the position P1, P2, ..., PH of the drive shaft 16 is linked, is attached.
- the position P1, P2, ..., PH of the drive shaft 16 can be clearly determined from the position of the motor shaft 14, for example via a gear ratio of the gearbox 15.
- the encoder system 13 can include a virtual rotary encoder that determines the position of the Motor shaft 14 is determined and from this the position P1, P2, ..., PH the drive shaft 16 derives.
- the feedback system 4 is set up to detect a value for the position P1, P2,..., PH of the drive shaft 16.
- an encoder system 13 which is designed as a multi-turn absolute encoder or single-turn rotary encoder, the value for the position of the drive shaft 16 is made available as a protocol.
- the value for the position P1, P2, ..., PH of the drive shaft 16 is determined from a rotor position of the motor 12.
- inductive feedback through the movement of the rotor in the motor windings of the motor 12 can be used, for example. Since the strength of the feedback varies periodically, the rotor position can be approximately determined, in particular by means of signal analysis, such as, for example, FFT analysis. Since one full rotation of the drive shaft 16 corresponds to a large number of rotations of the rotor, the position P1, P2, ..., PH of the drive shaft 16 can be inferred therefrom with much higher accuracy.
- the encoder system 13 can also be designed as a combination of a virtual rotary encoder and an auxiliary contact that is connected directly or indirectly to the drive shaft 16.
- the value for the position P1, P2, ..., PH of the drive shaft 16 is then formed from the signals from the virtual rotary encoder and the auxiliary contact.
- the control device 2 in particular the control unit 10 and / or the power section 11, is set up to control or regulate the motor 12, depending on a feedback signal that the feedback system 4 generates based on the value.
- the control device 2 for example the control unit 10, uses the value for the Posi tion P1, P2, ..., PH of the drive shaft 16 for determining the position of the switch 17.
- the value for the position P1, P2, ..., PH of the Drive shaft 16 can be specified as a range or tolerance. This makes it possible to increase the accuracy of the drive system 3 or to improve the reliability of the switchover between the current switch position SJ to the target switch position SJ + K.
- FIG. 2 shows a schematic representation of the switch 17 with the individual switching positions S1, S2, ..., SN, which can be approached with the motor 12.
- the encoder system 13 is assigned on the drive shaft 16.
- the switch 17 switches from, as shown here, the switch position S2 to the switch position S3.
- the ideal starting situation is shown in FIG. 2 in that the contact 20 for the switch position S2 has the position P1 of the drive shaft 16.
- the drive shaft 16 passes through the positions P2 to PH-1 and, at the end of the actuation of the motor 12, has reached the position PH, which corresponds to the target switching position S2.
- the contact 20 is in electrical connection with the switch position S3.
- the position PH of the drive shaft 16 thus clearly corresponds to the contact 20 with the switch position S3.
- a variety of positions P1, P2, ..., PH are determined for the drive shaft 16 with the encoder system 13.
- this plurality of positions P1, P2, ..., PH have been determined by the encoder system 13, it is clear that, for example, the switchover from the switch position SJ to the next higher switch position SJ + 1 has been carried out clearly and reliably .
- Figure 3 shows a schematic representation of the various positions P1, P2, ..., PH, to which the drive shaft 13 must move in order to get from one switching position SJ to the next switching position SJ + 1 (target switching position).
- the position P2 of the drive shaft 13 is not in the initial position P1 in the switching position SJ.
- at least one value of a first position P2 of the drive shaft 16 of the drive system 3 is determined. This position P2 is determined via a feedback signal from a feedback system 4 or the transmitter system 13.
- a value of a second position PH of the drive shaft 16 is also determined, this value corresponding to the position PH of the drive shaft 16 of the switch position SJ + 1 (target switch position) of the switch 17 to be approached. Switching from switch position SJ to switch position SJ + 1 takes place with a switching step K, which is 1 in this case.
- a difference between the value of the first position P2 and the value of the second position PH of the drive shaft 16 can be determined by the control device 2. Then, depending on the feedback signal, the control device 2 acts on the motor 12 until the value of the second position PH of the drive shaft 16, i.e. the switch position SJ + 1 (target switch position), is reached.
- a second option can be used to switch from switch position SJ to switch position SJ + 1 (target switch position). be enough.
- a value for the first position P2 of the drive shaft 16 is determined in the current switching position SJ. This value of the first position P2 of the drive shaft 16 is compared with the value of the position PH of the drive shaft 16 of the target switching position SJ last approached.
- the control device 2 acts , depending on the feedback signal, on the motor 12 until the value of the position PH of the drive shaft 16 of the last switched position SJ is reached.
- the positions P1, P2, ..., PH can then be traversed until the switch position SJ + 1 (target switch position SJ + K) is reached.
- FIG. 4 shows a schematic representation of a possible embodiment of a part of the encoder system 13, with which the positions P1, P2, ..., PH of the drive shaft 16 can be detected during the switchover.
- the encoder system 13 is an encoder disk 22 which is firmly connected to the drive shaft 16.
- the encoder disk 22 is assigned a sensor 24 which can detect the large number of identical markings M1, M2,..., MH arranged on the circumference of the encoder disk 22.
- the markings M1, M2, ..., MH correspond to the positions P1, P2, ..., PH of the drive shaft 16.
- FIG. 5 shows a method sequence for carrying out a circuit of a switching arrangement with a drive system 3 and a switch 17.
- a switch 17 which is designed here as an on-load tap-changer, the method will now be described.
- the switch 17 can, however, also be designed as a diverter switch, dialer, preselector, double turner or turner.
- a signal 30 for “switching” is first given to the control device 2.
- This signal 30 is generated by a voltage regulator, a monitoring system or by manual input (not shown).
- the on-load tap changer must be operated, for example, in order to adjust the voltage of the tap transformer. Adjustment runs of the on-load tap-changer during maintenance are also conceivable, during which the various switch positions S1, S2, ..., SN are approached.
- switching position S1, S2, ..., SN is the on-load tap changer.
- a value for the position P1, P2, ..., PH of the drive shaft 16 is queried via the power part 11. This is done via the feedback system 4.
- the value is transmitted via the encoder system 13 using multi-turn absolute encoders or single-turn rotary encoders, which are attached to the drive shaft 16 directly, or via the virtual rotary encoder, which is used for example an inductive feedback through the movement of the rotor in Motorwick lungs of the motor 12 uses, transmitted to the power unit 1 1 and queried by the Steuervor direction 2.
- the value determined by the control device 2 corresponds to a value which is assigned to a specific switching position S1, S2, ..., SN or step position of the load step switch.
- next step 60 the next switching position SJ + 1 or step position to be approached and thus the value for its position PH of the drive shaft 16 is determined.
- the specification of the switching position SJ + 1 or step position to be approached is specified by the signal 30 for switching.
- step 70 a difference between the values of the current position P1 of the drive shaft 16 or position, in the best case step position, and the approaching position PH of the drive shaft 16 is calculated.
- the difference represents the ideal value that the drive shaft 16 must achieve by rotation. In other words, if the difference is a distance to be covered by the drive shaft 16, this is transferred as the target.
- the control device 2 acts, depending on the feedback signal, on the motor 12 until the position PH of the drive shaft 16 to be approached and thus the position or step position to be approached has been reached.
- step 50 that is to say after determining the current position P1 of drive shaft 16
- contact 20 is moved to position PH.
- This is not always necessary. For example, it can happen that the contact 20 and thus the drive shaft 16 connected to it has moved away from the position P1, which corresponds to one of the switching positions S1, S2, ..., SN, due to vibrations.
- the value of the position PH of the drive shaft 16 that the feedback system 4 sends to the Power unit 11 and thus reports to the control unit 10 does not match the value for position P1 of drive shaft 16 and the last switched position SJ (switching from switch position SJ-1 to switch position SJ).
- step 55 if necessary, the position PH of the drive shaft 16 is corrected in such a way that the last stepped position SJ and thus the associated value for the position P1 of the drive shaft 16 is assumed.
- the further course takes place, as described in FIG. 5, with the next step 60. In other words, it is checked whether the drive shaft 16 is where it should be after the last switchover and, if necessary, it is in that position P1 of the drive shaft 16 driven, so brought back to the "correct" starting point.
- the control device 2 in particular the control unit 10, has a memory 18 in which for each specific switch position (S1, S2, ..., SN) of a switch 17, in particular the tap position of an on-load tap-changer, a value for the position of the drive shaft 16 is assigned.
- the travel profile specifies a target value that the drive shaft 16 has to travel.
- the actual value which is recorded via the feedback system 4
- the action on the motor 12 can either be interrupted or continued.
- the tolerance range can be assigned to a certain position P1, P2, ..., PH of the drive shaft 16 or step position and be determined variably.
- the tolerance range includes, for example, several positions, for example the positions P1-P5 around the respective switch position S1, S2, ..., SN.
- the selected tolerance range depends on the entire system. Furthermore, the tolerance range allows the inventive method to be carried out with less precise components / hardware. If the value is within a tolerance range, a correction, as shown in step 55, is not necessary.
- control unit 1 1 power unit 12 motor
Landscapes
- Control Of Position Or Direction (AREA)
- Housings And Mounting Of Transformers (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019112720.3A DE102019112720A1 (en) | 2019-05-15 | 2019-05-15 | Method for carrying out a changeover of a switch and drive system for a switch |
PCT/EP2020/061285 WO2020229124A1 (en) | 2019-05-15 | 2020-04-23 | Method for carrying out a switchover of a switch, and drive system for a switch |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3963615A1 true EP3963615A1 (en) | 2022-03-09 |
Family
ID=70456780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20721213.5A Pending EP3963615A1 (en) | 2019-05-15 | 2020-04-23 | Method for carrying out a switchover of a switch, and drive system for a switch |
Country Status (8)
Country | Link |
---|---|
US (1) | US20220208482A1 (en) |
EP (1) | EP3963615A1 (en) |
JP (1) | JP2022533325A (en) |
KR (1) | KR20220004222A (en) |
CN (1) | CN113811969A (en) |
BR (1) | BR112021020894A2 (en) |
DE (1) | DE102019112720A1 (en) |
WO (1) | WO2020229124A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021116421A1 (en) * | 2021-06-25 | 2022-12-29 | Maschinenfabrik Reinhausen Gmbh | switch unit |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7417411B2 (en) * | 2005-09-14 | 2008-08-26 | Advanced Power Technologies, Llc | Apparatus and method for monitoring tap positions of load tap changer |
RU2431884C2 (en) * | 2006-08-25 | 2011-10-20 | Абб Текнолоджи Лтд | Electric motor for on-load tap changer |
DE202010011521U1 (en) * | 2010-08-18 | 2011-11-23 | Maschinenfabrik Reinhausen Gmbh | OLTC |
BR112013025007B1 (en) * | 2011-03-27 | 2021-05-25 | Abb Schweiz Ag | tap switch with an improved monitoring system |
WO2012135209A1 (en) * | 2011-03-27 | 2012-10-04 | Abb Technology Ag | Tap changer with an improved drive system |
JP6695176B2 (en) * | 2016-03-16 | 2020-05-20 | エイブリック株式会社 | Switching regulator |
-
2019
- 2019-05-15 DE DE102019112720.3A patent/DE102019112720A1/en active Pending
-
2020
- 2020-04-23 BR BR112021020894A patent/BR112021020894A2/en unknown
- 2020-04-23 JP JP2021565960A patent/JP2022533325A/en active Pending
- 2020-04-23 KR KR1020217041083A patent/KR20220004222A/en not_active Application Discontinuation
- 2020-04-23 CN CN202080035469.2A patent/CN113811969A/en active Pending
- 2020-04-23 WO PCT/EP2020/061285 patent/WO2020229124A1/en unknown
- 2020-04-23 EP EP20721213.5A patent/EP3963615A1/en active Pending
- 2020-04-23 US US17/611,206 patent/US20220208482A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2022533325A (en) | 2022-07-22 |
CN113811969A (en) | 2021-12-17 |
KR20220004222A (en) | 2022-01-11 |
US20220208482A1 (en) | 2022-06-30 |
WO2020229124A1 (en) | 2020-11-19 |
DE102019112720A1 (en) | 2020-11-19 |
BR112021020894A2 (en) | 2021-12-21 |
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