WO2022156980A1 - Schaltereinheit für einen stufentransformator und stufentransformator mit schaltereinheit - Google Patents
Schaltereinheit für einen stufentransformator und stufentransformator mit schaltereinheit Download PDFInfo
- Publication number
- WO2022156980A1 WO2022156980A1 PCT/EP2021/086933 EP2021086933W WO2022156980A1 WO 2022156980 A1 WO2022156980 A1 WO 2022156980A1 EP 2021086933 W EP2021086933 W EP 2021086933W WO 2022156980 A1 WO2022156980 A1 WO 2022156980A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switch unit
- transformer
- low
- control device
- housing
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 59
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009434 installation 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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
Definitions
- the invention relates to a switch unit for a step transformer and a step transformer with a switch unit.
- Switch units in particular on-load tap changers, usually consist of a diverter switch and a selector.
- the on-load tap-changer is usually actuated by a drive that is located on the outside of the tank of a tap-changer.
- the drive has a motor that is coupled to the on-load tap changer via a gear.
- the energy required to operate the on-load tap changer is usually taken from the low-voltage network. This requires a low-voltage distribution board, a circuit breaker and a connecting line between the low-voltage distribution board and the drive. This represents a considerable effort, especially for small transformers, e.g. mast transformers.
- a further object of the invention is to create a tapped transformer with a switch unit that is simple, compact and safe in design.
- the invention proposes a switch unit for a step transformer, comprising a control device, a motor and an on-load tap changer; whereby
- control device controls the motor that actuates the on-load tap changer
- the control device draws energy directly from a low-voltage winding of the step-up transformer, needed for the actuation and control of the motor. Because the energy required to operate the switch unit is taken directly from the low-voltage winding of a step transformer, it is possible to create a self-contained system. A combination of external low-voltage distributors, circuit breakers and lines for the power supply is no longer necessary. A switching device is provided that requires no external connections once incorporated into the step-up transformer. Not only is the energy taken directly from the low-voltage winding, but the voltage on the low-voltage side is also monitored at the same time. These measurements are carried out using the control device and are used to regulate the voltage, in particular by actuating the switch unit, in particular the on-load tap changer. The entire assembly of the system can be done in the factory. During installation, the step transformer only has to be connected between the high-voltage network and the low-voltage network. A completely self-sufficient system is created.
- the control device also takes the energy required for the actuation and control of the motor directly from the low-voltage winding within the tapped transformer. All wiring between the switch unit and the active part remains inside the transformer housing. Thus, the step transformer only has to be connected between the high-voltage network and the low-voltage network. Wiring the switch unit to an external power supply becomes obsolete.
- the control device controls the on-load tap changer depending on the voltage at the low-voltage winding.
- the windings of the control winding of the high-voltage winding are switched on or off in order to keep the voltage on the low-voltage winding constant.
- the switch unit can be designed in any way, with the control device having a first connection and a second connection; the control device is connected to a first terminal and a second terminal of the low-voltage winding via the first connection and the second connection by means of a first line and a second line.
- connections of the control device are arranged within a housing of the switch unit and thus within the tapped transformer. This means that the lines for the power supply of the switch unit also run within the tapped transformer.
- the switch unit can be designed in any way, where the first terminal is connected to a first end of the low voltage winding; the second terminal is connected to a second end of the low voltage winding; the first terminal and the second terminal are arranged inside and inside the step-up transformer, respectively.
- the first and second ends of the low-voltage winding are configured as leads and extend from inside the step-up transformer to the outside through the transformer housing. Feedthroughs can be used for this.
- the ends or lines connect the low-voltage winding to the low-voltage network.
- the high-voltage winding also has a first end and a second end. These ends are also designed as lines and connect the high-voltage winding to the high-voltage network.
- the switch unit can be designed in any way, the switch unit comprising a housing with a first part and a second part;
- the first part of the housing protrudes at least partially from the transformer housing.
- the switch unit can be designed in any way, where
- control device is arranged in the first part of the housing and the motor and the on-load tap changer are arranged in the second part of the housing inside the tapped transformer.
- the interior of the first part of the housing protrudes from the step-up transformer, the interior of the first part of the housing abuts the interior of the step-up transformer.
- the lines that connect the control device to the terminals of the low-voltage winding run within the switch unit and thus also within the tapped transformer.
- the interior of the housing of the switch unit and the interior of the tapped transformer form a common interior, within which the lines of the sensors and the power supply run.
- the invention proposes a step transformer with a switch unit, comprising a transformer housing, a high-voltage winding connected to a high-voltage network, a low-voltage winding connected to a low-voltage network.
- the step transformer with the switch unit is a complete system that is suitable for direct connection.
- the step transformer only has to be connected to the mains or connected and is immediately ready for operation. It is no longer necessary to create complex connections for the power supply of the switch unit.
- a current sensor is arranged inside the tapped transformer, which is connected to the control device of the switch unit.
- FIG. 1 shows a switch unit with a step transformer.
- FIG. 1 shows a tapped transformer 10 with a switch unit 11 .
- the switch unit 11 has an on-load tap changer 1 with a diverter switch 2 and a selector 3 .
- the on-load tap changer 1 is actuated by a motor 5 which is also part of the switch unit 1 .
- the motor 5 is connected to a control device 6 and is controlled and supplied with energy by this.
- the control device 6 is also part of the switch unit 11 .
- the control device 6 comprises a power section 7, with a converter, and a control unit 8.
- the control device 6 also detects the position of the on-load tap changer 1.
- the switch unit 11 is at least partially arranged inside the tapped transformer 10, so that a first part 9.1 of the housing 9 of the Switch unit 1 1 at least partially protrudes from the transformer housing 12 and a second part 9.2 inside the tapped transformer 10 is arranged.
- the control device 6 is arranged in the first, protruding part 9.1 of the housing 9 of the switch unit 11.
- the on-load tap changer 1 is arranged in the second part 9.2 of the housing 9.
- the interior of the first part 9.1 of the housing 9 is connected to the interior of the transformer housing 12.
- the stepped transformer 10 has a high-voltage winding 30 and a low-voltage winding 21 .
- the high-voltage winding 30 is connected to a high-voltage network 31, in particular with a maximum voltage of 40.5 kV.
- the selector 3 of the on-load tap changer 1 is connected to the high-voltage winding 30 .
- the high-voltage winding 30 has a main winding and a control winding. By pressing the on-load tap changer 1, individual windings of the control winding are High-voltage winding 30 switched on or off and thus the voltage on the high-voltage winding 30 is increased or reduced and the voltage on the low-voltage winding 21 is thus maintained.
- the low-voltage winding 21 and the high-voltage winding 30 are arranged around a ferromagnetic yoke and a ferromagnetic core, respectively.
- the motor 5 drives the diverter switch 2 and the selector 3 .
- the low-voltage winding 21 is connected to the low-voltage network 32 . While the high-voltage winding 31 is connected to the distribution grid, the low-voltage winding 21 is connected to the end consumers. A voltage of 120V to 230V is usually applied to the low-voltage winding 21 .
- the low-voltage winding 21 has a first end 22 and a second end 23 , the second end being arranged opposite the first end 22 .
- the switch unit 11, in particular the control device, is connected to the first end 22 and the second end 23 via connections 26, 29, lines 24, 27 and terminals 25, 28. This connection is used to supply power to the switch unit 11.
- connection 26, 29 on the switch unit 11 and also the terminals 25, 28 on the low-voltage winding 21 are arranged inside the step transformer 10, i.e. in the transformer housing 12 and in the housing of the switch unit 11.
- the switch unit 11, in particular the control device 6 and the motor 5, is fed directly via the low-voltage winding 21.
- a voltage which is present between the first end 22 and the second end 23 of the low-voltage winding 21 is also measured via the lines 24 , 27 .
- This serves to regulate and control the switch unit 11.
- a current sensor 13 is arranged at the first end 22 of the low-voltage winding 21 and is connected to the switch unit 11, in particular the control device. Alternatively, this can also be arranged at the second end 23 of the low-voltage winding 21 .
- the current sensor 13 is also mounted inside the tapped transformer 10 directly on the low-voltage winding 21 inside the transformer housing 12 .
- the current sensor 13 is used to determine the direction of the current flow in the low-voltage winding 21 which is connected to the low-voltage network 32 . In connection with the measurement and the voltage between the two ends 22 and 23 of the low-voltage winding 21, it is thus determined whether energy is fed into the low-voltage network 32 or drawn from it.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Control Of Electrical Variables (AREA)
- Control Of Ac Motors In General (AREA)
- Ac-Ac Conversion (AREA)
- Protection Of Transformers (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21843930.5A EP4272234A1 (de) | 2021-01-21 | 2021-12-21 | Schaltereinheit für einen stufentransformator und stufentransformator mit schaltereinheit |
CN202180091335.7A CN116783674A (zh) | 2021-01-21 | 2021-12-21 | 用于分级变压器的开关单元和具有开关单元的分级变压器 |
AU2021421649A AU2021421649A1 (en) | 2021-01-21 | 2021-12-21 | Switch unit for a step transformer, and step transformer having a switch unit |
US18/260,620 US20240062969A1 (en) | 2021-01-21 | 2021-12-21 | Switch unit for a step transformer, and step transformer having a switch unit |
MX2023008541A MX2023008541A (es) | 2021-01-21 | 2021-12-21 | Unidad de interruptor para un transformador de pasos y transformador de pasos que tiene una unidad de interruptor. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021101236.8A DE102021101236B3 (de) | 2021-01-21 | 2021-01-21 | Stufentransformator mit Schaltereinheit |
DE102021101236.8 | 2021-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022156980A1 true WO2022156980A1 (de) | 2022-07-28 |
Family
ID=80112301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/086933 WO2022156980A1 (de) | 2021-01-21 | 2021-12-21 | Schaltereinheit für einen stufentransformator und stufentransformator mit schaltereinheit |
Country Status (7)
Country | Link |
---|---|
US (1) | US20240062969A1 (de) |
EP (1) | EP4272234A1 (de) |
CN (1) | CN116783674A (de) |
AU (1) | AU2021421649A1 (de) |
DE (1) | DE102021101236B3 (de) |
MX (1) | MX2023008541A (de) |
WO (1) | WO2022156980A1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015101153A1 (de) * | 2014-01-27 | 2015-07-30 | General Electric Company | System und Verfahren zum Betrieb eines Last-Stufenschalters |
DE102014112764A1 (de) * | 2014-09-04 | 2016-03-10 | Maschinenfabrik Reinhausen Gmbh | Schaltanordnung für einen Regeltransformator, insbesondere Polungsschalter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3106675A (en) | 1959-05-28 | 1963-10-08 | Mc Graw Edison Co | Electronic voltage regulator with reversible electro-responsive operator means |
US3349320A (en) | 1965-04-01 | 1967-10-24 | Mc Graw Edison Co | Tap changing transformer having means to change tap range |
DE102011008689B3 (de) | 2011-01-15 | 2012-03-08 | Maschinenfabrik Reinhausen Gmbh | Stufenschalter |
-
2021
- 2021-01-21 DE DE102021101236.8A patent/DE102021101236B3/de active Active
- 2021-12-21 CN CN202180091335.7A patent/CN116783674A/zh active Pending
- 2021-12-21 US US18/260,620 patent/US20240062969A1/en active Pending
- 2021-12-21 EP EP21843930.5A patent/EP4272234A1/de active Pending
- 2021-12-21 MX MX2023008541A patent/MX2023008541A/es unknown
- 2021-12-21 AU AU2021421649A patent/AU2021421649A1/en active Pending
- 2021-12-21 WO PCT/EP2021/086933 patent/WO2022156980A1/de active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015101153A1 (de) * | 2014-01-27 | 2015-07-30 | General Electric Company | System und Verfahren zum Betrieb eines Last-Stufenschalters |
DE102014112764A1 (de) * | 2014-09-04 | 2016-03-10 | Maschinenfabrik Reinhausen Gmbh | Schaltanordnung für einen Regeltransformator, insbesondere Polungsschalter |
Also Published As
Publication number | Publication date |
---|---|
AU2021421649A1 (en) | 2023-08-31 |
MX2023008541A (es) | 2023-07-31 |
DE102021101236B3 (de) | 2022-06-09 |
CN116783674A (zh) | 2023-09-19 |
US20240062969A1 (en) | 2024-02-22 |
EP4272234A1 (de) | 2023-11-08 |
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