EP4677635A1 - Dead-tank-hochspannungsleistungsschalter mit elektrode zur messung der spannung an dessen hochspannungsanschluss und verfahren zur spannungsmessung mit der elektrode - Google Patents
Dead-tank-hochspannungsleistungsschalter mit elektrode zur messung der spannung an dessen hochspannungsanschluss und verfahren zur spannungsmessung mit der elektrodeInfo
- Publication number
- EP4677635A1 EP4677635A1 EP24723814.0A EP24723814A EP4677635A1 EP 4677635 A1 EP4677635 A1 EP 4677635A1 EP 24723814 A EP24723814 A EP 24723814A EP 4677635 A1 EP4677635 A1 EP 4677635A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- circuit breaker
- dead
- electrode
- voltage circuit
- 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
- H01H33/02—Details
- H01H33/027—Integrated apparatus for measuring current or voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
Definitions
- the invention relates to a dead-tank high-voltage circuit breaker, with a housing and with at least one feedthrough on the housing for an electrical conductor, and with at least one electrode for shielding the electrical conductor from the housing.
- the invention further relates to a method for measuring voltage on the dead-tank high-voltage circuit breaker.
- Dead tank high-voltage circuit breakers are used to switch voltages and currents in the range of up to 1200 kV and in the range of up to several thousand amperes.
- Interrupter units in a dead tank i.e. in an earthed housing, e.g. made of metals such as cast iron or steel, are designed to close and/or open a current path, i.e. to switch.
- the housing is filled with an insulating gas, e.g. SF 6 and/or clean air.
- An interrupter unit comprises, e.g. at least one rated current contact and at least one arcing contact, or a vacuum interrupter with, in particular, two contact pieces.
- the movable contacts of the interrupter unit are moved by a drive during switching.
- Drives are, for example, B. Spring-loaded drives, motors and/or manual drives.
- a drive is, for example, attached to the housing of the dead-tank high-voltage circuit breaker.
- the housing is, for example, installed on a frame in a building or outdoors.
- the dead tank high-voltage circuit breaker switches, for example, overhead power lines, consumers such as machines, power generators and/or parts of power grids on and/or off.
- Power lines are connected to the dead tank high-voltage circuit breaker via contact flanges, with each power flange being electrically connected to the interrupter unit via an electrical conductor, e.g. in the form of a busbar in a bushing.
- the bushings are arranged on the housing of the dead tank high-voltage circuit breaker. The electrical conductors are led out of the housing to the outside via the bushings.
- electrodes are arranged in the area of the bushings in the housing of the dead tank high-voltage circuit breaker.
- the electrodes are firmly electrically connected to the earth potential to shield the live conductors.
- a voltage tap or voltage measurements are not provided for on the electrodes in the prior art, cf. in particular DE 19856775 Al.
- Separate devices such as inductive voltage transformers and/or capacitive voltage dividers are used to measure voltage in the high-voltage network.
- the separate devices for measuring voltage entail additional costs and space consumption in the voltage field or on the dead tank.
- a measurement signal is transmitted from the devices in the same way as in the control room, processed there and used to control the dead tank high-voltage circuit breakers.
- the invention is based on the object of specifying an improved dead-tank high-voltage circuit breaker with an electrode for measuring the voltage at its high-voltage connection and a method for measuring the voltage with the electrode, in particular with low costs and/or reduced space requirements compared to voltage measurements with separate measuring devices.
- the object is achieved according to the invention by a dead tank high-voltage circuit breaker with the features of claim 1 and/or a method for measuring voltage on a dead tank high-voltage circuit breaker, in particular a dead tank high-voltage circuit breaker as described above, according to claim 11.
- a dead tank high-voltage circuit breaker comprises a housing and at least one bushing on the housing for an electrical conductor, and at least one electrode for shielding the electrical conductor from the housing.
- the at least one electrode is at a floating potential. Because the at least one electrode is not at ground potential but at a floating potential, a voltage of a high-voltage connection of the dead tank high-voltage circuit breaker or the voltage on the electrical conductor which is arranged in the bushing with the at least one electrode can be measured at the at least one electrode.
- the at least one electrode can be arranged in the at least one feedthrough, in particular an open-air feedthrough.
- At least one interrupter unit can be arranged in the housing, which is connected to at least two electrical conductors, each of which is led out of the housing through a feedthrough, in particular for connecting a high voltage in the range greater than and/or equal to 52 kilovolts.
- a voltage can be measured on one or both electrical conductors and the function of the at least one interrupter unit can be checked, in particular the on and off switching state.
- the interrupter unit can also be switched depending on the occurrence of overvoltages on the electrical conductors.
- the measured voltages can be processed directly on site or transmitted to a control room and/or used to regulate or control the power grid and/or the interrupter unit.
- the at least one electrode can be constructed so as to be electrically insulated from the housing and can be electrically connected to ground potential, in particular via discrete capacitances.
- the at least one electrode With the at least one electrode at floating potential, which is constructed so as to be electrically insulated from the housing and is coupled to ground potential via discrete capacitances, the stray capacitance between conductor and electrode with the discrete capacitances forms a voltage divider which can be used to measure the high-voltage potential.
- An electrical circuit with at least one voltage divider can be included for measuring a high-voltage potential on the electrical conductor, wherein the voltage divider can include the particular discrete capacitances and at least one stray capacitance between the electrical conductor and the at least one electrode. This makes it possible to measure a voltage of a high-voltage connection of the dead-tank high-voltage circuit breaker or to measure the voltage on the electrical conductor which is arranged in the feedthrough with the at least one electrode.
- the electrical circuit for measuring a high-voltage potential can include elements for overvoltage protection, in particular for protecting connected measuring equipment. This provides effective protection against irreversible destruction when overvoltage peaks occur.
- the voltage divider can be designed in such a way, in particular with a ratio, that a low voltage is applied to the particularly discrete capacitances when a high voltage is applied to the dead tank high-voltage circuit breaker, in particular a low voltage in the range of up to 1000 volts.
- the ratio of the voltage divider can be selected so that a small voltage is applied to the discrete capacitors, which is normal for further processing.
- the potential increase of the electrode compared to the housing is negligible, so that the electrical field strengths occurring on the highly loaded elements of the dead tank high-voltage circuit breaker do not change significantly and the functionality of the electrode is retained.
- the modified potential connection of the electrode means that a non-conventional voltage transformer is integrated in the dead tank high-voltage circuit breaker. This means that a voltage measurement is available at each high-voltage connection of the circuit breaker, which means that function and load can be permanently monitored. Overvoltages that occur are recorded, which means that additional data is available for further investigations. For example, measurements of temporarily occurring overvoltages can be used in an aging model for the high-voltage insulation.
- the dead-tank high-voltage circuit breaker can be designed for switching in the range greater than or equal to 52 kV, i.e. for high voltages.
- the at least one electrode can be arranged in a cylindrical shape around the respective electrical conductor without contact, in particular symmetrically. This provides a good option for measuring voltage without voltage flashovers and voltage increases, in particular at the electrode and/or the housing, and a compact design of the dead-tank high-voltage circuit breaker is possible.
- the at least one electrode in particular made of copper, aluminum and/or steel, can be attached to an insulator of the respective bushing, in particular made of ceramic, silicone and/or a composite material, and/or can be attached to the housing of the dead tank high-voltage circuit breaker, in particular a metallic tank, in particular attached by screwing, welding, clamping and/or gluing, electrically insulated from the housing, which can be connected to ground potential.
- an insulator of the respective bushing in particular made of ceramic, silicone and/or a composite material
- the housing of the dead tank high-voltage circuit breaker in particular a metallic tank, in particular attached by screwing, welding, clamping and/or gluing, electrically insulated from the housing, which can be connected to ground potential.
- a method for measuring a voltage on a dead-tank high-voltage circuit breaker as described above comprises that the at least one electrode for shielding the electrical conductor from the housing measures a voltage at a high-voltage terminal of the dead-tank high-voltage circuit breaker at a floating potential, in particular continuously.
- An overvoltage can be detected by measuring the voltage at the high voltage terminal of the dead tank high voltage circuit breaker.
- the occurrence of overvoltage and/or its temporal progression can be used to determine the aging of a high-voltage Insulation of the dead tank high voltage circuit breaker .
- Figure 1 shows a schematic sectional view of a dead tank high-voltage circuit breaker 1 according to the invention, with a housing 2 and with two bushings 3 on the housing 2 for electrical conductors 4, wherein the conductors 4 are each surrounded by an electrode 5 for shielding at a floating potential, and
- Figure 2 shows a schematic enlarged sectional view of the electrode 5 in a feedthrough 3 .
- FIG. 1 shows a schematic side view of a dead tank high-voltage circuit breaker 1 according to the invention in a sectional view.
- the dead tank high-voltage circuit breaker 1 comprises a housing 2 with two bushings 3, which are arranged on the housing 2.
- At least one interrupter unit 6 for interrupting and/or closing at least one current path is arranged in the housing 2.
- the interrupter unit 6 is connected via electrical conductors 4 to connections, e.g. to an electrical power network, to power generators, power storage units, electrical consumers and/or high-voltage lines.
- the electrical conductors 4 are each spatially enclosed by a bushing 3 in order to electrically connect the interrupter unit 6 inside the housing 2 to the electrical connections outside the housing 2 via the electrical conductors 4.
- the housing 2 of the dead-tank high-voltage circuit breaker 1 is, for example, a metal housing, in particular made of steel, cast iron and/or aluminum.
- the particularly tank-shaped housing is, for example, a metal housing, in particular made of steel, cast iron and/or aluminum.
- the tank 2 is arranged and/or fastened on a frame 8, set up in a building or outdoors.
- the tank is, for example, cylindrical and gas-tight.
- the housing 2 is filled with an insulating gas, for example SF 6 , CO2 and/or purified, dried air, ie clean air.
- the interrupter unit 6 is arranged in the housing 2.
- the interrupter unit 6 comprises, for example, at least one conventional circuit breaker with rated current contact pieces and arcing contact pieces, and/or at least one vacuum interrupter.
- the movable contact pieces of the interrupter unit 6 are driven by a drive 7, e.g. a motor, a hand crank, and/or a spring-loaded drive.
- the drive 7 is arranged, for example, in the housing 2, or in an extra housing on the housing 2 and/or on the frame 8, and is mechanically connected to the movable contact pieces via elements of a kinematic chain, such as a gear and/or a switching rod.
- the bushings 3 are attached to the housing 2, e.g. via flanges, in particular in a gas-tight manner, e.g. screwed, welded, glued and/or clamped. Through the bushings
- the bushings are gas-tight and filled with the insulating gas, e.g. SF 6 , CO2 and/or purified, dried air, ie clean air.
- the bushings 3 comprise e.g. an insulator 12, in particular made of ceramic, silicone, and/or a composite material.
- the insulator 12 is, for example, cylindrical in shape, with ribs on the outer surface to extend leakage current paths.
- the feedthrough 3 is open towards the housing 2 and is gas-tight on the opposite side, towards the external connections, with conductors leading outwards.
- At least one conductor 4 is arranged at a distance from the insulator 12, e.g. congruent to the cylinder axis of the insulator 12, and is spatially spaced from the electrode 5 in at least one area.
- Conductors 4 are made of copper, aluminum and/or electrically highly conductive steel, for example, and/or are designed in the shape of a rod or busbar.
- the electrodes 5 are made of copper, aluminum and/or electrically highly conductive steel, for example, with a cylindrical shape or a truncated cone shape.
- Conductor 4, insulator 12 and electrode 5 of a respective feedthrough 3 are arranged, for example, on a congruent axis, which represents the longitudinal axis of the conductor 4, insulator 12 and electrode 5.
- Figures 1 and 2 are the same, with Figure 2 showing an electrode 5 in a schematically enlarged sectional view in an associated bushing 3.
- the electrode 5 is at a floating potential and is arranged at a distance around the associated conductor 4 for electrical shielding.
- a voltage of a high-voltage connection of the dead-tank high-voltage circuit breaker 1 or of the conductor 4 can be measured directly at the at least one electrode 5.
- an additional measuring device in particular a voltage transformer and/or a voltage divider outside the dead-tank high-voltage circuit breaker, can be dispensed with, which is associated with cost and space savings. A compact design is thus possible.
- the electrode 5 at a floating potential is electrically insulated from the housing 2 and coupled to the ground potential via at least one discrete capacitance 9.
- a stray capacitance 10 between the electrode 5 and the associated electrical conductor 4 forms a voltage divider with the at least one discrete capacitance 9, which is used to measure the high-voltage potential on the electrical conductor 4.
- an overvoltage protection device 13 is integrated into the measuring tap on the dead-tank high-voltage circuit breaker 1.
- the ratio of the voltage divider is selected, for example, such that a voltage that is usual for further processing is applied to the at least one discrete capacitance 9, in particular in the range from below one volt up to one volt, and/or in the range from one volt to several hundred volts.
- the potential increase of the electrode 5 compared to the housing 2 is thus negligible, so that the electrical field strengths occurring at the electrically highly stressed parts or elements of the dead tank high-voltage circuit breaker 1 do not change significantly and the shielding functionality of the electrode 5 for the conductor 4 is retained.
- the previously described electrical circuit 11 further comprises, for example, a terminating resistor 14, in particular in the range of a few ohms up to a few megaohms, for voltage voltage measurement via the at least one discrete capacitance 9 .
- a terminating resistor 14 Due to the modified potential connection of the electrode 5 at a floating potential, arranged at a distance around the conductor 4, a non-conventional voltage transformer is integrated in the dead tank high-voltage circuit breaker 1 .
- a voltage measurement is available at each high-voltage connection of the dead tank high-voltage circuit breaker 1, whereby function and load can be permanently monitored. Any overvoltages that occur are recorded so that additional data are available for further processing.
- measurements of temporarily occurring overvoltages can be used for an aging model of the high-voltage insulation. Monitoring as well as control and/or regulation of the switching of the dead tank high-voltage circuit breaker 1 or connected high-voltage lines and/or devices is made possible.
- the measurement data can be processed and/or sent locally, e.g. wirelessly or by cable, in particular via the intranet and/or internet, to a central control room and/or data processing facilities. There the data can be stored, processed and/or used for control purposes or, e.g. for predictive maintenance.
- a housing 2 of a dead-tank high-voltage circuit breaker 1 can accommodate several interrupter units 6. These can be electrically connected to one another and/or connected via at least two or more conductors 4 in e.g. bushings 3, in particular via external connections, to high-voltage conductors and/or networks, consumers and/or power generators.
- conductors 4 in e.g. bushings 3, in particular via external connections, to high-voltage conductors and/or networks, consumers and/or power generators.
- other high-voltage devices can also be arranged. ations, such as switching resistors, can be provided.
- An electrode 5 for voltage measurement can be provided around a conductor 4, or several electrodes, e.g.
- a dead-tank high-voltage circuit breaker 1 can also comprise several housings, each with interrupter units 6, bushings 3, electrical conductors 4 and/or electrodes 5 at free potential.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gas-Insulated Switchgears (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023204819.1A DE102023204819A1 (de) | 2023-05-24 | 2023-05-24 | Dead-Tank-Hochspannungsleistungsschalter mit Elektrode zur Messung der Spannung an dessen Hochspannungsanschluss und Verfahren zur Spannungsmessung mit der Elektrode |
| PCT/EP2024/062080 WO2024240461A1 (de) | 2023-05-24 | 2024-05-02 | Dead-tank-hochspannungsleistungsschalter mit elektrode zur messung der spannung an dessen hochspannungsanschluss und verfahren zur spannungsmessung mit der elektrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4677635A1 true EP4677635A1 (de) | 2026-01-14 |
Family
ID=91022579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24723814.0A Pending EP4677635A1 (de) | 2023-05-24 | 2024-05-02 | Dead-tank-hochspannungsleistungsschalter mit elektrode zur messung der spannung an dessen hochspannungsanschluss und verfahren zur spannungsmessung mit der elektrode |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4677635A1 (de) |
| CN (1) | CN121175774A (de) |
| DE (1) | DE102023204819A1 (de) |
| MX (1) | MX2025013889A (de) |
| WO (1) | WO2024240461A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19856775A1 (de) | 1998-11-30 | 2000-06-15 | Siemens Ag | Hochspannungsleistungsschalter mit einer Unterbrechereinheit |
| US6850399B1 (en) * | 2000-03-01 | 2005-02-01 | Hitachi, Ltd. | Gas insulated device and failure rating method |
| US6853528B2 (en) * | 2002-03-14 | 2005-02-08 | Hitachi, Ltd. | Gas insulating apparatus and method for locating fault point thereof |
| EP3561819B1 (de) * | 2018-04-26 | 2022-01-26 | Hitachi Energy Switzerland AG | Buchse mit einer optischen faser |
| DE102019211950B3 (de) * | 2019-08-08 | 2020-11-26 | Siemens Aktiengesellschaft | Messen einer elektrischen Spannung an einem metallgekapselten Schaltgerät |
| DE102020212385A1 (de) * | 2020-09-30 | 2022-03-31 | Siemens Energy Global GmbH & Co. KG | Hochspannungsgerät und Verfahren zur Erhöhung der dielektrischen Festigkeit in dem Hochspannungsgerät |
-
2023
- 2023-05-24 DE DE102023204819.1A patent/DE102023204819A1/de active Pending
-
2024
- 2024-05-02 WO PCT/EP2024/062080 patent/WO2024240461A1/de not_active Ceased
- 2024-05-02 EP EP24723814.0A patent/EP4677635A1/de active Pending
- 2024-05-02 CN CN202480034144.0A patent/CN121175774A/zh active Pending
-
2025
- 2025-11-20 MX MX2025013889A patent/MX2025013889A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MX2025013889A (es) | 2026-01-07 |
| DE102023204819A1 (de) | 2024-11-28 |
| WO2024240461A1 (de) | 2024-11-28 |
| CN121175774A (zh) | 2025-12-19 |
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