EP4508669A1 - Sensorsystem zur bestimmung der lichtbogenbrenndauer und laststufenschaltervorrichtung - Google Patents
Sensorsystem zur bestimmung der lichtbogenbrenndauer und laststufenschaltervorrichtungInfo
- Publication number
- EP4508669A1 EP4508669A1 EP23735970.8A EP23735970A EP4508669A1 EP 4508669 A1 EP4508669 A1 EP 4508669A1 EP 23735970 A EP23735970 A EP 23735970A EP 4508669 A1 EP4508669 A1 EP 4508669A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vacuum interrupter
- sensor system
- measuring device
- sensor unit
- unit
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
-
- 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
- H01H9/0038—Tap change devices making use of vacuum switches
-
- 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
- H01H9/50—Means for detecting the presence of an arc or discharge
-
- 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
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
Definitions
- the invention relates to a sensor system for determining the arc burning time and an on-load tap changer device.
- On-load tap changers are used for uninterrupted switching between different winding taps of an electrical equipment, such as a power transformer or a controllable choke. Due to the fact that the switching elements such as vacuum interrupters and selector arms are always at high voltage potential, these parts are generally not monitored. However, means and methods for monitoring these parts are desired.
- the invention proposes a sensor system for determining the arc burning time in a vacuum interrupter, comprising a measuring device with a receiver and a measuring device; a sensor unit with a voltage divider, an energy generator, an energy conversion unit, an evaluation unit and a transmitter; wherein the sensor unit can be connected to a first contact and a second contact of a vacuum interrupter; the sensor unit is connected to the measuring device via a signal transmitter.
- the voltage divider of the sensor unit detects the voltage applied to the vacuum interrupter when an arc occurs in the vacuum interrupter, or picks up the voltage applied to the vacuum interrupter.
- a detected arc is transmitted as an output signal to the measuring device via the evaluation unit and the transmitter and evaluated by the measuring device.
- the duration of the arc burning time can be determined getting closed.
- the sensor unit is autonomously supplied with energy by the energy generator. This is particularly advantageous since the sensor unit is at high voltage potential. Complex cabling for a power supply is not necessary.
- the transmitter and the receiver can be designed in any way, for example the transmitter can be designed as a diode and the receiver as a photodiode. In such an embodiment, the signal transmitter is then designed as an optical waveguide. Furthermore, depending on the design of the transmitter, receiver and signal transmitter, the signal transmission can take place in any way, for example via radio, Bluetooth, WLAN, etc.
- the energy generator can, for example, be a current converter or voltage converter or a converter based on the energy harvesting principle. This is preferably arranged within the step transformer, preferably at the high voltage potential.
- the evaluation unit can also be designed as a rectifier network.
- the evaluation unit is preferably connected to the energy generator via the energy conversion unit in order to supply the sensor unit with energy.
- the voltage divider of the sensor unit is connected to the first contact and the second contact of the vacuum interrupter to detect the arc burning time.
- the sensor unit is designed and set up to be connected to a vacuum interrupter of an on-load tap changer; in particular, the sensor unit is designed and set up to be connected to a first and a second contact of the vacuum interrupter.
- the vacuum interrupter can be designed in any way and have a first contact and a second contact.
- the contacts extend from the inside of the vacuum interrupter to the outside.
- the sensor unit can be connected directly to the contacts of the vacuum interrupter or with conductive elements such as cables that are connected to the contacts.
- the invention further proposes an on-load tap changer device comprising an on-load tap changer with a vacuum interrupter; a sensor system with a measuring device and a sensor unit for determination the arc burning time in the vacuum interrupter; wherein the sensor unit is connected to a first contact and to a second contact of the vacuum interrupter; the measuring device is connected to the sensor unit via a signal transmitter.
- the on-load tap changer device makes it possible to determine the arc burning time within a vacuum interrupter of the on-load tap changer. This ensures that arcs within the on-load tap changer go out during operation. Furthermore, based on this information, the on-load tap changer actuation via the drive can be adjusted so that the arc burning time is as short as possible. Due to the arrangement of the sensor unit in the immediate vicinity of the vacuum interrupter, the on-load tap changer device has a particularly compact design. Furthermore, the sensor unit is supplied with energy independently by its own energy generator.
- the on-load tap changer device further has a drive for actuating the on-load tap changer, the drive being controlled via the measuring device of the sensor system.
- the drive is located on the outside of the step transformer.
- the measuring device can be arranged outside the step transformer or inside the step transformer.
- the measuring device can be arranged in the on-load tap changer head.
- the measuring device and the drive are always connected to earth potential.
- the sensor unit is arranged within the tap transformer or within the on-load tap changer in the immediate vicinity of the vacuum interrupter. Inside the tap transformer or within the on-load tap changer means in the housing of the tap transformer or in or on the housing of the on-load tap changer.
- the sensor unit is arranged in the oil container of the diverter switch.
- the diverter switch is part of the on-load tap changer and is also arranged inside a tap transformer, i.e. in its housing.
- the sensor unit and the vacuum interrupter are always at high voltage potential. This also applies to the diverter switch.
- Figure 1 shows a tap transformer with an on-load tap changer device
- Figure 2 shows a sensor unit.
- Figure 1 shows a tap transformer 1 with an on-load tap changer device 30.
- the on-load tap changer device 30 has an on-load tap changer 2 and a sensor system 20.
- the on-load tap changer 2 is connected to a drive 3 and is actuated by it.
- the on-load tap changer 2 has - not shown - a diverter switch and a selector. Furthermore, the diverter switch and thus also the on-load tap changer 2 has at least one vacuum interrupter 4, which is used for switching under load.
- a sensor unit 10 is connected to the vacuum interrupter 4. The sensor unit is used to detect or determine the arc burning time when actuating, in particular when opening the vacuum interrupter 4.
- the sensor unit 10 is preferably arranged in the on-load tap changer 4, in particular in the diverter switch or in the immediate vicinity of the vacuum interrupter 4. Furthermore, the sensor unit 10 is connected to a measuring device 5. The sensor unit 10 and the measuring device 5 form a sensor system 20 for detecting or determining the arc burning time.
- FIG. 2 shows a detailed view of the sensor unit 10.
- the sensor unit 10 is connected to the vacuum interrupter 4 of the on-load tap changer 2 at a first contact 4.1 and at a second contact 4.2 of the vacuum interrupter 4.
- the sensor unit 10 has a voltage divider 11, which is set up and designed to reduce the high voltage present across the vacuum interrupter 10 to a lower voltage.
- the voltage divider 11 of the sensor unit is connected to the first contact 4.1 and to the second contact 4.2 of the vacuum interrupter 4.
- an energy generator 12 is provided. This provides the energy necessary for the operation of the sensor unit 10.
- the energy generator 12 can be designed, for example, as a current converter, voltage converter or another converter that functions according to the energy harvesting principle (by sensing temperature, mechanical vibrations, electrical or magnetic fields).
- the energy generator 12 is either an integral part of the sensor unit 10, i.e. integrated, or is connected to it in an electrically conductive manner.
- An energy conversion unit 13 is widely provided. This adapts the energy received from the energy generator 12 to the needs and requirements of the evaluation unit 14 and the transmitter 15 in accordance with the specifications of the other components, ie voltage and current. Furthermore, the energy conversion unit 13 generates a reference voltage.
- the energy conversion unit 13 can, for example, be designed as a rectifier network and, for example, also include capacitors or coils for intermediate energy storage.
- the evaluation unit 14, which is designed, for example, as a comparator network, is connected to the voltage divider 11 and the energy conversion unit 13. The evaluation unit 14 is designed and set up to evaluate the voltage detected or tapped by the voltage divider 11. Here, the voltage picked up by the voltage divider 11 is used to determine whether an arc is present in the vacuum interrupter 4 during a switchover.
- the evaluation unit 14 is set up and designed to detect a specific voltage value or a voltage range, to process or compare it with a reference voltage and to generate an output signal therefrom.
- the evaluation unit 14 is connected to a transmitter 15. This transmits the output signals generated by the evaluation unit 14 to the measuring device 5.
- the transmitter 15 is preferably designed as a diode.
- the measuring device 5, which is at ground potential, has a receiver 16, which is designed as a diode or photodiode.
- the transmitter 15 and the receiver 16 are connected to one another via an optical fiber, which serves as a signal transmitter 17.
- the signal transmission can take place in any way, for example via radio, Bluetooth, WLAN, etc.
- the measuring device 5 can be inside the tap transformer 1 below the on-load tap changer cover or outside on the tap transformer 1 , for example, be arranged in the motor drive or voltage regulator.
- the measuring device 5 also has a measuring device 18 with which the received output signal can be evaluated.
- the measuring device 18 is designed and set up to process and evaluate the output signal and can, for example, have a corresponding processor and a memory.
- a vacuum interrupter 4 of the on-load tap changer 2 is opened by means of the drive 3. Since a sinusoidal current usually flows through the on-load tap changer 2 and thus through the vacuum interrupter 4, arcs can occur between the contacts when the vacuum interrupter 4 is opened. These usually go out the next time the current crosses zero or when the contacts of the vacuum interrupter are far enough apart. If the current is at its zero point when opening, no arc will occur.
- the sensor unit 10 serves to record the arc burning time.
- a voltage value or a voltage range from the voltage divider 11 is converted into an output signal in the evaluation unit 14 and transmitted to the measuring device 5 via the transmitter 15.
- the measuring device 18 in the control device 5 measures the duration of the output signal and uses this to determine the arc burning time.
- the duration of the output signal depends on the arc burning time or is determined by it.
- the measuring device 18 is designed and set up to determine the arc burning time from the output signal of the sensor unit 10.
Landscapes
- Measuring Fluid Pressure (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022117590.1A DE102022117590A1 (de) | 2022-07-14 | 2022-07-14 | Sensorsystem zur Bestimmung der Lichtbogenbrenndauer und Laststufenschaltervorrichtung |
| PCT/EP2023/066606 WO2024012814A1 (de) | 2022-07-14 | 2023-06-20 | Sensorsystem zur bestimmung der lichtbogenbrenndauer und laststufenschaltervorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4508669A1 true EP4508669A1 (de) | 2025-02-19 |
Family
ID=87067022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23735970.8A Pending EP4508669A1 (de) | 2022-07-14 | 2023-06-20 | Sensorsystem zur bestimmung der lichtbogenbrenndauer und laststufenschaltervorrichtung |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP4508669A1 (de) |
| JP (1) | JP2025523653A (de) |
| KR (1) | KR20250036134A (de) |
| CN (1) | CN119452446A (de) |
| DE (1) | DE102022117590A1 (de) |
| WO (1) | WO2024012814A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0622087B2 (ja) * | 1987-05-25 | 1994-03-23 | 松下電工株式会社 | 封止接点装置 |
| US7225676B2 (en) * | 2004-05-18 | 2007-06-05 | Jennings Technology | Method and apparatus for the detection of high pressure conditions in a vacuum switching device |
| WO2014087123A2 (en) * | 2012-12-03 | 2014-06-12 | HOU, Jianping | Transformer tapping arrangement and methods of operation of same |
| CN111696821B (zh) * | 2020-06-24 | 2021-09-24 | 广东电网有限责任公司电力科学研究院 | 一种真空灭弧室及柱上开关 |
| DE102020209645A1 (de) * | 2020-07-30 | 2022-02-03 | Siemens Aktiengesellschaft | Verfahren zur Zustandsbestimmung einer elektrischen Schaltanlage, Überwachungseinheit für eine elektrische Schaltanlage und elektrische Schaltanlage |
-
2022
- 2022-07-14 DE DE102022117590.1A patent/DE102022117590A1/de active Pending
-
2023
- 2023-06-20 EP EP23735970.8A patent/EP4508669A1/de active Pending
- 2023-06-20 JP JP2025500786A patent/JP2025523653A/ja active Pending
- 2023-06-20 WO PCT/EP2023/066606 patent/WO2024012814A1/de not_active Ceased
- 2023-06-20 CN CN202380049940.7A patent/CN119452446A/zh active Pending
- 2023-06-20 KR KR1020257001004A patent/KR20250036134A/ko active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024012814A1 (de) | 2024-01-18 |
| JP2025523653A (ja) | 2025-07-23 |
| DE102022117590A1 (de) | 2024-01-25 |
| KR20250036134A (ko) | 2025-03-13 |
| CN119452446A (zh) | 2025-02-14 |
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