EP4005059A1 - Verfahren zum feststellen unsymmetrischer schwingungen beim betrieb eines an ein hochspannungsnetz angeschlossenen elektrischen geräts - Google Patents
Verfahren zum feststellen unsymmetrischer schwingungen beim betrieb eines an ein hochspannungsnetz angeschlossenen elektrischen gerätsInfo
- Publication number
- EP4005059A1 EP4005059A1 EP20746878.6A EP20746878A EP4005059A1 EP 4005059 A1 EP4005059 A1 EP 4005059A1 EP 20746878 A EP20746878 A EP 20746878A EP 4005059 A1 EP4005059 A1 EP 4005059A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measured values
- communication unit
- data processing
- values
- electrical device
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/12—Monitoring network conditions, e.g. electrical magnitudes or operational status
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/16—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network the power network being controlled at grid-level, e.g. using aggregators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2103/00—Details of circuit arrangements for mains or AC distribution networks
- H02J2103/30—Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks
- H02J2103/35—Grid-level management of power transmission or distribution systems, e.g. load flow analysis or active network management
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/30—State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
Definitions
- the invention relates to a method for determining unsym metric vibrations when operating an electrical Ge device that is connected to a high-voltage network.
- GIC Garnier Induced Currents
- a direct current component results in a magnetic direct flux component in the core of the transformer that is superimposed on the alternating flux. It comes to an asymmetrical control from the magnetic material in the core, which brings a number of disadvantages.
- a direct current of just a few amperes leads to saturation of the core with magnetic flux. This is associated with a significant increase in core losses (e.g. 20-30%). Heating problems can occur especially with a large GIC. Furthermore, there is an increased noise emission during operation, which is felt to be particularly annoying when the transformer is installed near a living area.
- the object of the invention is therefore to provide a method of the type mentioned above, with which it can be determined easily, quickly and reliably whether the electrical device oscillates asymmetrically when operating in a high-voltage electrical supply network.
- the invention solves this problem in that operating noises of the electrical device are recorded with the help of acoustic sensors, which provide measured values on the output side, the measured values and / or the values derived from the measured values are transmitted to a communication device via a short-range communication link , the measured values and / or the values derived from the measured values are transmitted from the communication unit to a data processing cloud via a long-range communication link, the measured values and / or the values derived from the measured values from the data processing cloud by means of a Fourier transformation can be broken down into their frequency components while obtaining a frequency spectrum, even and odd frequency components of the frequency spectrum are determined depending on a basic frequency of the high-voltage supply network and set in a ratio R to each other, on which there are asymmetrical vibrations ngen is closed when the ratio R exceeds a predetermined threshold value.
- the detection of asymmetrical vibrations has been carried out using complex electrical measurements or acoustic measurement series on the electrical device.
- the analysis of the measurement data had to be carried out by experts. In other words, the previously known methods entailed high costs.
- the method according to the invention is not only inexpensive, but can also be easily started without any special specialist knowledge being required. It can therefore be carried out by any user, for example the operator of the electrical device. If asymmetrical vibrations are detected, suitable measures can be taken to suppress them.
- the electrical device When operating the electrical device, it is connected to a high-voltage network within the scope of the invention.
- the electrical device is therefore designed for high voltages and for example a transformer, especially a power transformer, or a choke.
- a transformer or such a choke preferably has a tank filled with an insulating fluid.
- an active part In the tank, an active part is arranged, which has a magnetizable core and at least one winding. At least one winding is verbun during operation with the AC voltage carrying high voltage network.
- An ester liquid or a mineral oil, for example, can be used as the insulating fluid.
- it also serves to cool the components.
- a direct current component in the electrical device causes an additional odd component in the overall spectrum.
- the communication unit has at least one analog and at least one digital input.
- the communication unit can also with current, voltage, temperature or
- the communication unit has, for example, a main processor and a secondary processor as well as a memory unit in which preprocessed measured values or values derived from them can be stored and processed, e.g. by averaging.
- the measured values from various sensors can therefore be sent jointly from a communication unit via a long-range communication connection to the data processing cloud.
- the user of the method according to the invention is, for example, an operator of a power supply network who is responsible for a number of transformers, circuit breakers, capacitor batteries, spark gaps or the like.
- any sensor that can detect acoustic signals, that is, sound waves, on the input side and can provide electrical signals on the output side as a function of the sound wave amplitude can be used as an electrical sensor.
- These electrical signals are referred to here as measured values.
- the electrical signals can be analog electrical signals, for example an electrical current or a voltage, the magnitude of which is the amplitude of the received Sound wave corresponds.
- the measured values can also be digital values that were generated, for example, by sampling the analog signals, obtaining sampling values and digitizing the sampling values.
- each sensor is connected to the communication unit via a short range communication link.
- the short-range communication connection can be a simple cable, for example.
- the short-range communication connection is, for example, a ZigBee, Bluetooth, wireless, Ambus or WiFi communication connection.
- the short-range communication link extends a maximum of 100 meters.
- the connection between the communication unit and the data processing cloud takes place within the scope of the invention via a long-range communication connection.
- the communication unit has a long-range communication device, such as a cellular module according to the GPRS or UMTS standard.
- a long-range communication connection preferably an IP-based data connection, with the data processing cloud.
- a mobile radio service provider or a telecommunications provider can be interposed and the long-range communication connection can be established at least partially via a communications network of this provider and / or at least partially via the Internet. To establish the connection, only very little configuration or parameterization is required.
- a cloud or data processing cloud should be understood here to mean an arrangement with one or more data storage devices and one or more data processing devices that can be designed to carry out any data processing processes using suitable programming.
- the data processing devices are generally universal data processing devices, such as servers, which initially have no specific design with regard to their construction and programming. The universal data processing device can only be upgraded to carry out specific functions once it has been programmed.
- the cloud has several individual components, these are connected to one another in a suitable manner for data communication, for example by a communication network. Any data for data storage and / or processing can be fed to a data processing cloud.
- the data processing cloud itself makes the stored data and / or the events of the data processing carried out available to other devices, for example computer workstations, laptops, smartphones connected to a data processing cloud.
- a data processing cloud can, for example, be provided by a data center or several networked data centers. Usually, a data processing cloud is designed spatially remote from the high-voltage devices.
- the electrical device is designed for operation in the voltage or high-voltage network, i.e. for an operating voltage between 1 kV and 1200 kV, in particular 50 kV and 800 kV.
- the high-voltage network is preferably an AC voltage network.
- an electrical device for example a transformer, in particular a power transformer, a choke or the like.
- the communication unit is a mobile phone.
- a so-called “smart phone” is particularly suitable as a mobile phone.
- a smart phone is to be understood here as a powerful mobile phone.
- Such mobile phones are usually already equipped with a microphone as an acoustic sensor Unit, for example via at least one processor.
- the entire mobile phone is not used here to carry out the method according to the invention.
- the mobile phone uses its microphone to record the noises of a transformer and transmit them Readings on its memory unit.
- a connection to the data processing cloud, to which the measured values are sent individually or averaged, is established at predetermined time intervals.
- the measured values from several acoustic sensors are transmitted together to the data processing cloud.
- the measured values can be preprocessed beforehand, for example averaged over a measuring period.
- the mobile phone advantageously has another communication unit with a memory unit on which the measured values or the values derived from the measured values are stored.
- the storage unit simplifies the possibly required preprocessing of the measured values.
- the acoustic signals are preferably recorded at various locations in the vicinity of the electrical device.
- the user records the noises of the electrical device at different positions or measurement locations with the help of a portable acoustic sensor, for example in front of, next to and behind the electrical device.
- a mean value based on the measurements carried out.
- Software preferably guides the user interactively so that the right steps can be carried out at the right time.
- the acoustic signals are advantageously recorded over a predetermined period of time.
- the duration is preferably in the range between 10 and 60 seconds for each measurement.
- the geographical location of the respective communication unit and the electrical device connected to it is determined and transmitted to the data processing cloud by means of an antenna for position determination, which is arranged in the communication unit.
- the acoustic signals are recorded at different locations (A, B, C, D) in the vicinity of the electrical device.
- the sensor or sensors are permanently installed in the electrical device.
- FIG 1 shows an embodiment of the invention
- Figure 2 illustrate a further embodiment of the inven tion schematically.
- FIG. 1 shows an embodiment of the method according to the invention, in which a transformer 1 is shown schematically as an electrical device.
- the transformer 1 has a tank 2 with an insulating fluid such as one Ester liquid or a mineral oil is filled.
- a magnetizable core 3, which forms a closed magnetic circuit, is arranged in the tank 2.
- the legs of the core 3 are each enclosed by two concentrically arranged windings, of which only the outer high-voltage winding 4 can be seen.
- the windings are connected via bushings 5 to the phases of a high-voltage network carrying alternating voltage.
- An expansion vessel 6 is used to compensate for temperature-related fluctuations in volume of the insulating fluid in the tank 2 of the
- a Buchholz relay 7 can be seen in the connecting line between tank 2 and expansion vessel 6.
- FIG. 1 also shows a portable acoustic sensor 2, shown only schematically, which detects the operating noises of the transformer 1 at four different locations A, B, C and D.
- the portable sensor 8 is connected to a communication unit 12, here a communication box, via a Bluetooth connection 11 as a short-range communication connection.
- the communication box 12 is fixedly mounted on the outside of the wall of the tank 2. It has a storage unit on which the measured values supplied by the sensor 8 are stored in a spatially resolved manner.
- the communication box 12 connects every 2 minutes via a long-range communication connection 13 with a data processing cloud 9 and sends the measured values stored on its hard drive via the long-range communication connection 13 to a data processing cloud 9 bene analysis procedures to detect asymmetrical vibrations.
- a mobile phone can also be used for sound measurement within the scope of the invention.
- the mobile phone 8 has software or an “app” which asks the user of the method to measure the noise over a predetermined period of time and then change location in order to carry out the measurement again.
- a microphone not shown in the figures, is used to measure the noise anyway.
- the mobile phone 8 stores the time-resolved acoustic signals generated by its microphone on the basis of the measurement after they have been digitized on its memory unit, which is also not shown.
- the mobile phone then connects to the data processing cloud 9 via the remote connection and transmits the locally stored measured values to the data processing cloud 9.
- This has software that performs a Fourier transformation of the transmitted measured values. This is followed by the formation of the ratio R already described above.
- the method according to the invention derives from the size of R whether and, if applicable, to what extent asymmetrical oscillations are present and, if applicable, to what extent the transformer is loaded with a direct current component.
- the result of the method gives the user certainty about this and can now initiate appropriate countermeasures in order to suppress the direct current component that may have been determined.
- the data processing cloud can be accessed with a laptop or computer 10 in order to obtain the result of the analysis.
- FIG. 2 shows a further exemplary embodiment for implementing the method according to the invention
- a transformer 1 can again be seen as an electrical device which essentially corresponds to the transformer shown in FIG.
- the transformer 1 according to FIG. 2 has four sensors 8, which are arranged within the tank 2.
- Each sensor 8 is connected via a short-range communication link 11, which is again designed as a Bluetooth link, to a communication unit 12, which is shown in the th embodiment is not firmly taken on the transformer 1 fastened. Rather, the communication unit 12 is located in a nearby housing, not shown in the figures, which is set up approximately 20 m away from the transformer 1.
- the communication unit 12 has four inputs, so that all four sensors 8 are connected to the communication unit 12 at the same time.
- the noises or sound waves generated during operation of the transformer 1 are detected by the sensors 8, which generate an analog electrical signal, here a current, as a function of the amplitude of the sound waves.
- the analog signals are sampled and the sampled values obtained from them are digitized. The digitized values are referred to here as measured values.
- Said measured values are transmitted to the communication unit 12 via the short-range communication link 11.
- This has a memory unit, not shown in the figures, on which the measured values are stored.
- the measured values are preprocessed; H.
- the measured values transmitted every 2 seconds are averaged over a period of 2 minutes and the averaged values are stored on the storage unit.
- the communication unit 12 establishes a connection with the data processing cloud 9 via a long-range communication connection 13.
- the measured values or the averaged measured values or values derived from the measured values are transmitted to the data processing cloud 9. This then carries out the examination of the measured values with the aid of suitable software, in other words a Fourier transformation is carried out and the spectrum obtained in this way is examined for the presence of asymmetrical vibrations.
- the analysis method is described in more detail further above.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019211040.1A DE102019211040A1 (de) | 2019-07-25 | 2019-07-25 | Verfahren zum Feststellen unsymmetrischer Schwingungen beim Betrieb eines an ein Hochspannungsnetz angeschlossenen elektrischen Geräts |
| PCT/EP2020/069428 WO2021013573A1 (de) | 2019-07-25 | 2020-07-09 | Verfahren zum feststellen unsymmetrischer schwingungen beim betrieb eines an ein hochspannungsnetz angeschlossenen elektrischen geräts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4005059A1 true EP4005059A1 (de) | 2022-06-01 |
Family
ID=71842627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20746878.6A Pending EP4005059A1 (de) | 2019-07-25 | 2020-07-09 | Verfahren zum feststellen unsymmetrischer schwingungen beim betrieb eines an ein hochspannungsnetz angeschlossenen elektrischen geräts |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12308639B2 (de) |
| EP (1) | EP4005059A1 (de) |
| CN (1) | CN114174847A (de) |
| BR (1) | BR112022000436A2 (de) |
| DE (1) | DE102019211040A1 (de) |
| WO (1) | WO2021013573A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019207358A1 (de) * | 2019-05-20 | 2020-11-26 | Siemens Aktiengesellschaft | Verfahren zum Feststellen unsymmetrischer Schwingungen in einem elektrischen Gerät |
| EP4163616B1 (de) * | 2021-10-06 | 2025-08-20 | Hitachi Energy Ltd | Überwachung einer leistungsvorrichtung |
| CN120027862B (zh) * | 2025-04-18 | 2025-06-24 | 国网浙江省电力有限公司杭州供电公司 | 一种对配电站房的自动化监测方法、系统、设备及介质 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9223299B2 (en) * | 2012-11-30 | 2015-12-29 | Discovery Sound Technology, Llc | Equipment sound monitoring system and method |
| KR20170053304A (ko) | 2015-11-06 | 2017-05-16 | 주식회사 파워토스 | 변압기 이상 감지를 위한 음향 스펙트럼 감지기 |
| AT518598A1 (de) * | 2016-05-10 | 2017-11-15 | Siemens Ag Oesterreich | Überwachen der Inbetriebnahme und der Plausibilität von Daten eines Leistungsmesssensors in einem Verteilernetz |
| CN106199226B (zh) * | 2016-07-22 | 2018-11-20 | 国家电网公司 | 三相负载不平衡条件下配电变压器噪声监测方法及系统 |
| US10566835B2 (en) * | 2016-07-22 | 2020-02-18 | International Business Machines Corporation | Detecting power outages using smartphone sensors |
| CN106249076B (zh) * | 2016-07-22 | 2019-10-11 | 国家电网公司 | 受谐波负载影响下的配电变压器状态检测方法及系统 |
| US10985559B2 (en) * | 2017-02-03 | 2021-04-20 | Techhold Llc | Method and system for improved operation of power grid components in the presence of direct current (DC) |
| CA3055933A1 (en) | 2017-03-10 | 2018-09-13 | Abb Schweiz Ag | Smart grid distribution transformer |
| CN108508318B (zh) * | 2018-03-22 | 2020-12-18 | 国网湖南省电力有限公司 | 一种判断变压器不平衡负载运行状态的方法及系统 |
| CN108519526B (zh) * | 2018-03-22 | 2020-12-25 | 国网湖南省电力有限公司 | 一种判断变压器谐波负载运行状态的方法及系统 |
| DE202018004493U1 (de) * | 2018-04-20 | 2018-11-06 | Siemens Aktiengesellschaft | Sensformer |
| EP3736580B1 (de) | 2019-05-08 | 2023-08-02 | Siemens Energy Global GmbH & Co. KG | Erkennen eines gleichstromanteils in einer induktiven einrichtung |
| DE102019207358A1 (de) | 2019-05-20 | 2020-11-26 | Siemens Aktiengesellschaft | Verfahren zum Feststellen unsymmetrischer Schwingungen in einem elektrischen Gerät |
| EP3783630B1 (de) | 2019-08-22 | 2023-10-04 | Siemens Energy Global GmbH & Co. KG | Vorrichtung zum unterdrücken eines gleichstromanteils beim betrieb eines an ein hochspannungsnetz angeschlossenen elektrischen geräts |
-
2019
- 2019-07-25 DE DE102019211040.1A patent/DE102019211040A1/de not_active Ceased
-
2020
- 2020-07-09 WO PCT/EP2020/069428 patent/WO2021013573A1/de not_active Ceased
- 2020-07-09 BR BR112022000436A patent/BR112022000436A2/pt active Search and Examination
- 2020-07-09 CN CN202080053247.3A patent/CN114174847A/zh active Pending
- 2020-07-09 US US17/629,935 patent/US12308639B2/en active Active
- 2020-07-09 EP EP20746878.6A patent/EP4005059A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR112022000436A2 (pt) | 2022-03-03 |
| US20220294262A1 (en) | 2022-09-15 |
| DE102019211040A1 (de) | 2021-01-28 |
| CN114174847A (zh) | 2022-03-11 |
| US12308639B2 (en) | 2025-05-20 |
| WO2021013573A1 (de) | 2021-01-28 |
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