EP2443641B1 - Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge - Google Patents
Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge Download PDFInfo
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- EP2443641B1 EP2443641B1 EP10725719.8A EP10725719A EP2443641B1 EP 2443641 B1 EP2443641 B1 EP 2443641B1 EP 10725719 A EP10725719 A EP 10725719A EP 2443641 B1 EP2443641 B1 EP 2443641B1
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- oil
- tap changer
- hydrogen content
- failure
- hydrogen
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Images
Classifications
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- 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
-
- 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
-
- 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
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- 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
-
- 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
Definitions
- the invention relates to a method and device for detecting failure of a vacuum interrupter in an on-load tap-changer, wherein the tap changer comprises; an oil filled housing, a diverter switch (3) including a movable contact (MC, RC), and at least one vacuum interrupter (MVI, RVI) arranged to interrupt a current through the movable contact of the diverter switch.
- a diverter switch (3) including a movable contact (MC, RC), and at least one vacuum interrupter (MVI, RVI) arranged to interrupt a current through the movable contact of the diverter switch.
- a tap changer is a device used with transformers for regulation of the voltage levels. This is achieved by having the tap changer altering the number of turns in a winding of the transformer.
- On load tap changers generally comprises of a diverter switch and a tap selector switch operating as a unit to effect transfer current from one voltage tap to the next.
- the diverter switch does the entire on load making and breaking of currents, whereas the tap selector pre-selects the tap to which the diverter switch will transfer the load current.
- the tap selector operates off load. When the power output from a transformer is to be changed from one voltage level to another, this occurs by first connecting the selector to that tapping point of the transformer winding which corresponds to the new voltage level while the diverter switch is still feeding from the existing voltage level.
- connection of the selector thus takes place without current load.
- a switching operation then takes place with the aid of the diverter switch such that output current is taken out from the new tapping point of the transformer.
- a diverter switch of the kind referred to here is normally used for control of power or distribution transformers.
- the OLTC may also advantageously be used for control of other types of electrical devices, such as, power transmission or distribution products, such as reactors, industrial transformers, phase shifters, capacitors or the like.
- the operation of the diverter switch involves commutation from one circuit to another with ensuing occurrence of an electric arc.
- the diverter switch together with all subsystems is placed in a tank and submerged in oil.
- the on-load tap changer comprises the tank together with oil, diverter switches and subsystems.
- the oil in the tank acts as electric insulator and as a coolant to remove the generated heat in the OLTC.
- the oil will also quench the arcs generated during switching.
- the arcing during the operation of the OLTC will pollute the insulating oil and wear the switch contacts.
- a diverter switch of this kind is provided with at least one main branch and one resistance branch each with a vacuum interrupter.
- a diverter switch of the above kind is previously known from, for example, US 5,786,552 (DO).
- DO The diverter switch described therein thus has one main branch and one resistance branch, in the steady state connected in parallel and connected to an output line.
- Each branch is provided with a vacuum switch and a contact connected in series therewith. These are operated in a definite sequence when diverter switching is to take place, in which case it is important to ensure that the main branch is operated before the resistance branch for the OLTC but for some load interrupters the main branch is not operated before the resistance branch.
- the vacuum switch of the main branch may be dimensioned for breaking of the load current only and the vacuum switch of the resistance branch for the circulating current that arises.
- the vacuum switch of the main branch would be forced to break the sum of these currents and thus be dimensioned therefore.
- US 3,206,569 (D1) illustrates a tap changer (8) provided with vacuum switches.
- the tap changer is connected (5) to a main transformer (1).
- the tap changer is separated from the transformer and is provided in the same container and liquid as the transformer ( figure 2 ) or in a separate container and separate liquid ( figure 3 ).
- a hood (39) provided for collecting gas is arranged above the tap changer, and the hood (39) is adapted to convey gas to a gas sensor (40).
- the gas sensor (40) is of a type that senses hydrogen and hydrocarbon gases. If the vacuum switch fails (see column 5, line 11-25), the contactors (9, 10) opens and draw an arc that produces a gas bubble. The gas is detected by the sensor, which gives an alarm. In this way the alarm indicates that the vacuum switch is malfunctioning.
- the auxiliary contact system in the OLTC is capable to break the current a limit number of operations, dependent of OLTC type and load, possibly between 10 to 500 times.
- auxiliary contact system i.e. the movable contact of the diverter switch
- the wear of the auxiliary contacts by arcs lead to that the contacts no longer can connect and lead current. If auxiliary main contacts can not connect two things can happen:
- ABB provides a monitoring and computing system called TEC (Transformer Electronic Control) which monitors transformers and tap changers, like the OLTC.
- TEC Transformer Electronic Control
- a system with TEC are equipped with sensors and measuring units, and is adapted to measure and monitor the status and performance of a tap changer or a transformer. It also includes a computing unit for calculating process data from measurements. For example, the TEC system measures and monitors the bottom and top oil temperature in the transformer tank and calculates hot spot temperatures of the transformer windings.
- the TEC is also adapted to display reference values, like a reference value for the top and bottom temperatures.
- a hydrogen sensor has been arranged in the transformer oil and being communicatively connected to the TEC, it has provided measurings of hydrogen in the transformer, indicating electric arcing or sparks in the transformer part of the OLTC.
- the TEC is described in more detail in "Intelligent Monitoring System, Type TEC User's manual” that is published at the website http://www.abb.com/electricalcomponents
- One object of the present invention is to provide a method for detecting failure of vacuum interrupters of a On-Load Tap-Changer (OLTC).
- OLTC On-Load Tap-Changer
- the invention can be used to improve the functioning of the TEC system from ABB and also similar monitoring and control systems for tap changers from other suppliers.
- the method comprises repeatedly measuring a hydrogen content in the oil of the housing of the tap changer, and determining whether there is a failure in the vacuum interrupter based on the measurement of hydrogen content in the oil.
- the method is provided to monitor the hydrogen content and makes it possible to monitor its variations.
- the determining step may include using the switching history of the tap changer, e.g. how many times the tap changer has been switched or how often it is switched, to determine a failure.
- the measurement of hydrogen content is compared to a predicted content which is based on the switching history, and the method indicates failure only when the measured content deviates from the predicted content a certain amount, i.e. the difference being larger than a threshold value.
- the hydrogen sensor and TEC system combination as described above can be used, but the sensor should be positioned in the tap changer oil instead of in the transformer oil (or in addition to a sensor in the transformer oil), and a different analysis should be performed, since no longer measuring the performance of the transformer. Also, the use of the tap changer is monitored by monitoring the number of operations, which is used for analyzing the hydrogen content and the change of the hydrogen content in the oil.
- Another object of the present invention is to provide a device for detecting failure of vacuum interrupters of a tap changer.
- the device comprises an oil filled housing of the tap changer arranged with a sensor 10 for repeatedly measuring the content of hydrogen in oil, and a computing unit is configured to analyze the measurements of hydrogen content in the oil and to determine if there is a failure in the vacuum interrupters (MVI, RVI).
- MVI, RVI vacuum interrupters
- the object of the invention is solved by realizing that if the vacuum interrupter fails, current is no longer interrupted by the vacuum interrupters but the auxiliary contact system.
- the auxiliary contact has to break the current, thus creating arcs in the oil.
- These arcs combined with the known fact that arcs in insulation oil increase the amount of hydrogen in the insulating oil.
- With a hydrogen sensor detecting the absolute amount of hydrogen in oil or the rate of change of hydrogen in oil, it is possible to detect that the vacuum interrupter has not been capable to break the current and thus allows the detection of vacuum interrupter failure.
- the method further comprises the step of;
- the determination whether there is a failure in the vacuum interrupter can be done by comparing the measured level of hydrogen in oil with a fixed maximum allowed hydrogen level and/or by comparing the increase of hydrogen in oil over time by using stored previous measurements of hydrogen in oil.
- the method further comprises the step of; - executing an action if a failure is determined in vacuum interrupter.
- the action can be to send a warning to the control system of the tap changer or transformer.
- the warning could also be sent to a plant wide control system.
- the action can also be to only allow a limited number of critical operations without overload of the diverter switch.
- the action can also be to stop the diverter switch from moving at all.
- the selected action can depend on the level of hydrogen in oil or the rate of increase of the level of hydrogen in oil.
- the OLTC When a serious vacuum interrupter failure has been detected the OLTC have to immediately stop maneuvering or only make a limited number of critical operations without overload if these are considered critical for the operation of the system it serves.
- the limited number of operations of the diverter switch can be less than 200 or even less that 20 until the OLTC have been checked by maintenance personnel.
- the transformer can still be used but the voltage level is no longer controllable but this is a preferred state to the case when the error is undetected and the OLTC undergoes a catastrophic failure.
- the step determining whether there is a failure in the vacuum interrupter comprises the steps of repeatedly;
- the operation of the tap changer is the timing of switching moves of the diverter switch and load current at the time of the switching moves.
- the model could be a physical model to project the hydrogen release based on the number of switches and the load current or the model could be a look-up model based on measurements and/or past data where the average hydrogen release is calculated based on the number of switches and the load current.
- the level of hydrogen in the tap changer oil will naturally vary dependent on how the tap changer is operated i.e. how often the taps are performed and what load currents have to be interrupted.
- This model based determination of vacuum interrupter failure is much less likely to make errors in determining failures than a system that only compares the measured hydrogen level in oil with an absolute hydrogen level. To make a faulty determination of vacuum interrupter failure could lead to an unnecessary shut down of the transformer - tap changer system. This unnecessary shut down would lead to a potential power loss of all connected systems e.g. industrial installation or residential housing which would be very expensive.
- the determination if there is a failure of the vacuum interrupter is based on if LH 2 mes (new) - H 2 mes (old) ] - ⁇ H 2 est > eps is true.
- H 2 mes (new) is a parameter describing the current measured hydrogen content in oil, this can be a single measurement or a some mean or average of a number of measurements.
- H 2 mes (old) is a parameter describing the previously measured hydrogen content in oil, this can be a single measurement or a some mean or average of a number of previous measurements.
- ⁇ H2 est is an expected change in hydrogen content in oil based on operation of the tap changer.
- the operation of the tap changer is the timing of switching moves of the diverter switch and load current at the time of the switching moves.
- eps is a safety parameter that will ensure that a failure of the vacuum interrupter is not determined unless the measured increase in hydrogen is above eps.
- eps can be in the order of a few ppm up to several hundred ppm of hydrogen in oil, depending on type of tap-changer, load, age of oil and risk of a false alarm.
- the computing unit is configured to send a warning to the control system if a failure of the vacuum interrupters (MVI, RVI) is detected.
- MVI, RVI vacuum interrupters
- the computing means are an integrated part of the control system, which can be provided by a computer program product upgrading an existing control program.
- the computing unit is configured to send a signal to the control system to stop or limit movement of the diverter switch if a failure of the vacuum interrupters (MVI, RVI) is detected.
- MVI, RVI vacuum interrupters
- the computing unit is configured to receive data of the operation of the tap changer and said computing unit is configured to calculate an expected change in hydrogen content and compare the expected change in hydrogen content with the analyzed measurements of hydrogen content in the oil to determine failure in the vacuum interrupters (MVI, RVI).
- FIG. 1 shows schematically an on-load tap-changer 2 in a transformer 8 with an embodiment of the present invention.
- the tap-selector 1 is mounted beneath the diverter switch 3.
- the movements of the OLTC get the energy from a motor drive mechanism 9, here mounted on the wall of the transformer 8.
- the movements from the motor 9 are transferred by shafts 6', 6" and a bevel gear 7.
- An oil conservator 5 ensures that there is enough of oil in the OLTC at all temperatures.
- a hydrogen sensor device 10 is immersed in the oil of the tap changer, the placement in the drawing is only indicative it can be arranged anywhere in the housing.
- the hydrogen sensor device 10 signals to a drive control unit 11 which control the movements of the motor 9 driving the diverter switch 3.
- the hydrogen sensor device 10 signals to a computing unit, which computing unit also receives signals indicating maneuvering of the diverting switch such as driving command signals for the motor 9, which drive command signal is received, for example, from the motor 9.
- the transformer 8 and the OLTC 2 are both oil filled but have different housings and the oil in the OLTC and the oil in the transformer are never in contact. It is also possible to arrange the OLTC outside the transformer tank.
- Figure 1 illustrates a first embodiment, wherein the sensor 10 is communicatively connected to the drive control unit 11, which includes means for determining a failure based on the hydrogen measurements.
- the control unit 11 may be incorporated in a control system of an electric power transmission substation.
- Figure 9 illustrates an alternative embodiment, wherein the sensor 10 is communicatively connected to a computing unit 12, including the means for failure determination based on the hydrogen content.
- the computing unit 12, in figure 9 is also communicatively connected to the motor drive mechanism and receives signals from the motor drive mechanism when the tap changer is maneuvered. These signals can be the command signals that the motor drive mechanism 9 receives from the drive control unit 11, via a drive control connection that operatively connects the drive control unit 11 to the motor 9.
- the embodiments of figures 1 and 9 include arranging a sensor 10 in the oil of the tap changer, which sensor transfer measurements to a computing unit 11, 12.
- the communication can be provided by electric signaling of analog signals from the sensor, which analog signals are converted to digital data, for example by means of an I/O module sampling analog process data and including an AC/DC-converter and means for digital communication, such as Ethernet communication capabilities, which module receives the electric analog signals of the measurements from the sensor, converts the signals into digital data that it subsequently transfer by means of Ethernet to a computer control system of, for example, the substation.
- the sensor 10 includes digital processing and communication means and samples the measurements into data that are transferred to the computing unit of the substation control system via, for example, a digital data bus.
- the hydrogen sensor device 10 signals to computing means 11,12 which is adapted to determine if the vacuum interrupter malfunctions based on the hydrogen content, preferably its history or the variations of the hydrogen content.
- the computing means is suitably also adapted to use operational data of the tap changer, and use this data for improving the analysis to better determine if the vacuum interrupter fails. In this way the effect of switching the tap changer can be accounted for when evaluating the hydrogen content, so that an expected level of hydrogen content based on the normal hydrogen content variations and also the hydrogen content increase that derives from the switching can be used instead of only a fixed hydrogen content alarm level.
- the computing means can be provided by a computer program that when it is installed on a control computer of a substation for electric transmission enhances the performance of the control system by adding the vacuum interrupter malfunctioning determination function in accordance with the invention.
- the computer program will make it possible to use signals from a hydrogen sensor suitably installed in an OLTC oil filled compartment to determine that a vacuum interrupter is malfunctioning.
- the computer program will also provide the means of using signals indicating maneuvering of the OLTC for enhancing the determination further.
- the signals that indicate maneuvering can be provided from drive signals of a motor drive mechanism 9 already present in the control system, or actions can be taken to provide corresponding signals in systems hitherto not using them.
- the signals is suitably received from the motor drive mechanism 9 when it is operated, or from the drive control unit 11 that provides these command signals to the motor 9.
- Figures 2a-2e shows schematically the switching sequence of the on-load tap-changer from position 6 to position 5 on the transformer winding.
- the dominant electrical flows are indicated by the grey arrows.
- the sequence is designated the symmetrical flag cycle. This means that the main switching contact of the diverter switch breaks before the transition resistors are connected across the regulating step. This ensures maximum reliability when the switch operates with overloads.
- the breaking takes place at the first current zero after contact separation, which means an average arcing time of approximately 4-6 ms.
- the total time for a complete sequence is approximately 50 milliseconds.
- the tap change operation time of the motor-drive mechanism is approximately 5 s/step.
- Arcs occur in any of the movements where a contact is opened.
- Each level can be associated with different actions. For example, when the hydrogen concentration goes above 43 warning level 40, the control system alerts the monitoring system for the transformer or a plant wide control system alerting operators that something might not be OK with the tap changer. When the hydrogen concentration goes above 44 first alarm level 41, the control system alerts the monitoring system for the transformer or a plant wide control system alerting operators and will only perform the most necessary tap changes. When the hydrogen concentration goes above 45 second alarm level 42, the control system alerts the monitoring system for the transformer or a plant wide control system and alerting operators and stops all tap changes.
- Fig 7 shows a schematic view of a possible development of hydrogen content/concentration 46 in oil over time in the tap changer.
- the hydrogen detector measures the hydrogen concentration 46 in oil and the analysis of the measurement, performed by the computing means, compares the measured hydrogen concentration data series with different warning or alarm levels of increase of hydrogen concentration.
- the rate of increase of measured hydrogen concentration is larger than a possible warning increase 50.
- the rate of increase of measured hydrogen concentration is larger than a possible alarm increase 51.
- the analysis of the data series 46 might include smoothing or filtering of the measured values.
- Fig 8 shows a schematic view of a possible development of hydrogen content/concentration 46 in oil over time in the tap changer where each tap change is associated with a up-tic of the concentration of hydrogen.
- the analysis system also have to include the frequency of tap changes or the time between taps.
- a large number of tap changes 51 might generate a larger increase of hydrogen than on with much fewer taps 50. But the increase of the curve 50 with few taps might indicate a problem.
- the system has to be able to, and is suitably adapted to, separate the two cases 50, 51 and might give a warning/alarm for 50 but not for 51.
- the relative size of the curves and alarm levels in figures 6-8 are only for illustration.
- the arc in the main contacts has a current equal to the load current while the current in the transition contacts is composed by half the load current and the circulation current.
- the circulation current is dependent of the step voltage and the resistance of the transition resistor and is thus load independent.
- Each of these arcs lasts normally for max half a period and the average will be half a period that is 5 ms for 50 Hz.
- the energy in these arcs determines the amount of gas that is generated.
- the gas generation can be estimated to be linear with the energy dissipation of the arcs.
- the primary goal for an OLTC with arc quenching in vacuum interrupters is to prevent arcs in oil.
- the arcing in the oil gives several disadvantages such as higher erosion of the contact material in the breaking contacts and deterioration of the oil due to the high temperatures in the arcs.
- the deterioration of the oil generates substances that reduces the dielectric withstand of the oil, especially in the presence of moisture, as well as increases the wear of the mechanism.
- the diverter switch breaks the current from one tap before it connects the other one. In order not to generate interruptions in the circuit, the load current goes through the transition contacts during the time it takes for the main contacts to safely break the current from tap 1 until tap 2 is connected.
- auxiliary contact By designing the auxiliary contact such that they can break the load current or circulating current in case a vacuum interrupter fails, a much larger safety margin against such serious failures is obtained.
- auxiliary contacts are made primarily for conducting current the materials are selected for low resistance and not for good arc resistance. The goal is that they should be able to make half a cycle of operation while breaking maximum the rated load current with maintained function both as current conductor and as breaking contact.
- supervisory device must give alarm before the contacts are destroyed so much by the arcs that they not fulfils their functions.
- the aim is to give alarm not to trip the transformer. Since several operations are possible it does not need to trip the transformer.
- detections methods are possible such as pressure detection, oil flow detection (in the tube to the oil conservator), light detection, radio emission detection, etc.
- This invention deals with the possibility to use hydrogen concentration changes in the insulating oil as a parameter for detection of arcs in the oil.
- OLTCs with vacuum interrupters for high currents have normally by-pass contacts that are by-passing the vacuum interrupter circuit when the OLTC is in position, to prevent the vacuum interrupters to continuously conduct the current as well as to protect them from short-circuit currents.
- the by-pass contact will generate commutation sparks when the current is commutated from the by-pass path to the vacuum interrupter circuit due to the small inductances in the circuit. These sparks will generate small amounts of hydrogen. The energy released is though only a few percent of that of a real arc in the oil and the gas generation is in relation to that.
- OLTCs not having by-pass contacts do still have the auxiliary contacts. These do not commutate any current but during switching they are potentially disconnected shortly which give them a voltage that causes minor capacitive discharge sparks. The energy in these are even smaller than that from the commutation sparks in the by-pass contacts but will give rise to small amounts of hydrogen in the oil after a large amount of operations at voltage.
- the invention can be used in different types of OLTCs, for example, OLTCs having by-pass contacts and OLTCs without by-pass contacts.
- the analysis performed by the computing means should be correspondingly adapted, but its main features can be the same.
- compositions of these gases are such that about 75 % is hydrogen (H2) and about 20 % is acetylene (C2H2).
- H2 hydrogen
- C2H2 acetylene
- the composition will be closer to 100 % hydrogen.
- Acetylene is easily dissolved in oil due to its similarity with the hydrocarbons in oil while hydrogen is not easily dissolved.
- This method requires some intelligence and availability to information about when operations occur and the load of the transformer. But it gives the advantage of being more sensitive and reacting faster especially in applications with low currents and/or low operation frequency.
- This method is preferably used in combination with a transformer control and protection system, such as ABB TEC or similar, that already has access to the data needed. It can of course also be made with a separate unit
- the interpretation is made with a special program in the control system.
- the interpretation is made such that the change in concentration of hydrogen is related to the spark energy released per unit of time.
- the load current is available as well as the number of operation per unit of time. The arc energy might thus be easily calculated and the hydrogen concentration is related to that.
- the method should have been adapted to automatically calculate the expected values within a certain tolerance width. This width can be quite large since the difference between the hydrogen generation at normal service and arcs in oil differ so much. Thus, the calculation does not need to be very precise.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Protection Of Transformers (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Claims (12)
- Procédé destiné à détecter une défaillance d'un disjoncteur à vide dans un changeur de prise sous charge, le changeur de prise comportant :- un boîtier rempli d'huile,- un capteur d'hydrogène disposé à l'intérieur du boîtier,- un commutateur (3) comprenant un contact mobile (MC, RC), et- au moins un disjoncteur à vide (MVI, RVI) disposé pour couper un courant à travers le contact mobile du commutateur (3), caractérisé en ce que le procédé comporte les étapes consistant, de façon répétée, à- mesurer une teneur en hydrogène dans l'huile,- transférer les données de mesures de teneur en hydrogène à une unité de calcul, et- déterminer s'il existe une défaillance dans le disjoncteur à vide (MVI, RVI) en se basant sur la mesure de teneur en hydrogène dans l'huile,l'étape consistant à déterminer s'il existe une défaillance dans le disjoncteur à vide comportant les étapes consistant, de façon répétée, à :- recevoir des données sur le fonctionnement du changeur de prise- calculer une variation prévue de la teneur en hydrogène en se basant sur un modèle mathématique du changeur de prise et lesdites données sur le fonctionnement du changeur de prise, et- déterminer s'il existe une défaillance du disjoncteur à vide en se basant sur la variation prévue calculée de la teneur en hydrogène et au moins deux des mesures de teneur en hydrogène.
- Procédé selon la revendication 1, le procédé comportant en outre l'étape consistant à :- mémoriser la mesure de teneur en hydrogène dans l'huile, et- déterminer s'il existe une défaillance dans le disjoncteur à vide (MVI, RVI) en se basant sur la mesure de teneur en hydrogène dans l'huile et sur au moins une mesure mémorisée de teneur en hydrogène dans l'huile.
- Procédé selon l'une quelconque des revendications 1 à 2, le procédé comportant en outre l'étape consistant à :- exécuter une action si une défaillance est déterminée dans le disjoncteur à vide.
- Procédé selon la revendication 3, l'action comportant l'étape consistant à- générer une alerte.
- Procédé selon la revendication 3, l'action comportant l'étape consistant à- ne permettre qu'un nombre limité d'opérations critiques sans surcharge du commutateur.
- Procédé selon la revendication 3, l'action comportant l'étape consistant à- immobiliser le commutateur.
- Procédé selon la revendication 1, lesdites données de fonctionnement comportant : des mouvements de contacts et un courant de charge.
- Procédé selon l'une quelconque des revendications 1 à 7, l'étape consistant à déterminer s'il existe une défaillance du disjoncteur à vide ayant lieu selon que
[H2 mes(new) - H2 mes(old)] - ΔH2 est > eps
est vérifiée, oùH2 mes(new) - paramètre décrivant la teneur en hydrogène mesurée actuelle,H2 mes(old) - paramètre décrivant la teneur en hydrogène mesurée précédemment,Δ\H2 est - variation prévue de la teneur en hydrogène basée sur des données opérationnelles, eteps - paramètre de sûreté qui garantit qu'une défaillance du disjoncteur à vide n'est déterminée que si l'accroissement mesuré de l'hydrogène est supérieur à eps. - Changeur de prise sous charge doté de moyens servant à détecter une défaillance d'un disjoncteur à vide dans le changeur de prise sous charge, le changeur de prise comportant :- un boîtier rempli d'huile doté d'un commutateur (3) comportant des contacts mobiles (MC, RC) dotés de disjoncteurs à vide (MVI, RVI) en série disposés de façon à couper le courant avant que les contacts (MC, RC) ne se déconnectent, et le changeur de prise sous charge étant caractérisé en ce que- le boîtier rempli d'huile est muni d'un capteur (10) servant à mesurer de façon répétée la teneur en hydrogène dans l'huile, relié de façon communicative à un moyen de calcul de l'agencement et disposé de façon à transférer des signaux de mesures de la teneur en hydrogène au moyen de calcul,- une unité de calcul est configurée pour analyser les mesures de teneur en hydrogène dans l'huile et pour déterminer s'il existe une défaillance dans les disjoncteurs à vide (MVI, RVI),ladite unité de calcul étant configurée pour recevoir des données sur le fonctionnement du changeur de prise et ladite unité de calcul étant configurée pour calculer une variation prévue de la teneur en hydrogène et comparer la variation prévue de la teneur en hydrogène aux mesures analysées de teneur en hydrogène dans l'huile pour déterminer une défaillance dans les disjoncteurs à vide (MVI, RVI).
- Changeur de prise sous charge selon la revendication 9, le changeur de prise comportant un système (11) de commande qui commande le mouvement du commutateur, et ladite unité de calcul étant configurée pour envoyer une alerte au système de commande si une défaillance des disjoncteurs à vide (MVI, RVI) est détectée.
- Changeur de prise sous charge selon la revendication 9, ladite unité de calcul étant configurée pour envoyer un signal au système de commande en vue de bloquer ou de limiter le mouvement du commutateur si une défaillance des disjoncteurs à vide (MVI, RVI) est détectée.
- Produit de programme informatique destiné à détecter un dysfonctionnement d'un changeur de prise, le produit de programme informatique étant prévu pour effectuer l'étape de détermination du procédé selon l'une quelconque des revendications 1 à 8 lorsqu'il est exécuté sur un ordinateur.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10725719.8A EP2443641B1 (fr) | 2009-06-18 | 2010-06-17 | Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09163129A EP2264729A1 (fr) | 2009-06-18 | 2009-06-18 | Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge |
EP10725719.8A EP2443641B1 (fr) | 2009-06-18 | 2010-06-17 | Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge |
PCT/EP2010/058572 WO2010146131A1 (fr) | 2009-06-18 | 2010-06-17 | Procede et dispositif permettant la detection d'une panne d'un interrupteur sous vide d'un changeur de prise en charge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2443641A1 EP2443641A1 (fr) | 2012-04-25 |
EP2443641B1 true EP2443641B1 (fr) | 2014-12-17 |
Family
ID=41314515
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09163129A Withdrawn EP2264729A1 (fr) | 2009-06-18 | 2009-06-18 | Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge |
EP10725719.8A Active EP2443641B1 (fr) | 2009-06-18 | 2010-06-17 | Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP09163129A Withdrawn EP2264729A1 (fr) | 2009-06-18 | 2009-06-18 | Procédé et dispositif pour détecter la défaillance d'un interrupteur de vide dans un changeur de prise de charge |
Country Status (6)
Country | Link |
---|---|
EP (2) | EP2264729A1 (fr) |
KR (1) | KR101517656B1 (fr) |
CN (1) | CN102460624B (fr) |
BR (1) | BRPI1011777B8 (fr) |
RU (1) | RU2544844C2 (fr) |
WO (1) | WO2010146131A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9679710B1 (en) | 2016-05-04 | 2017-06-13 | Cooper Technologies Company | Switching module controller for a voltage regulator |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8836523B2 (en) * | 2011-05-20 | 2014-09-16 | General Electric Company | Fault gas alarm system |
GR1008066B (el) * | 2012-03-22 | 2013-12-18 | Bharat Heavy Electricals Limited, | Βελτιωμενος μετασχηματιστης ισχυος με μεταγωγεα ληψεων για λειτουργια υπο φορτιο (oltc) τυπου κενου που μπορει να λειτουργει με μανομετρικο υψος ελαιου που υπερβαινει τα δεκα μετρα |
EP2959493B1 (fr) * | 2013-02-20 | 2017-04-12 | ABB Schweiz AG | Système de contact de changeur de prise |
EP2743943A1 (fr) * | 2013-05-22 | 2014-06-18 | ABB Technology Ltd | Changeur de prises de transformateur |
WO2015044331A1 (fr) * | 2013-09-26 | 2015-04-02 | Maschinenfabrik Reinhausen Gmbh | Procédé et système pour faire fonctionner, en l'absence de gaz, un commutateur à plots pourvu d'un présélecteur |
KR101623875B1 (ko) * | 2014-11-14 | 2016-06-07 | 주식회사 포스코 | 변압기 질소 충전 장치 및 질소 충전 방법 |
EP3563398A4 (fr) * | 2016-12-30 | 2020-07-15 | ABB Schweiz AG | Changeur de prises en charge et son procédé de fabrication |
EP3745434B1 (fr) * | 2019-05-28 | 2023-05-17 | Hitachi Energy Switzerland AG | Diagnostics d'impulsions de pression d'un changeur de prise en charge |
CN113985270B (zh) * | 2021-11-02 | 2022-05-27 | 广东电网有限责任公司 | 一种有载分接开关切换时序检测方法、系统和介质 |
CN116667721B (zh) * | 2023-07-31 | 2023-09-29 | 江西第二电力设备有限公司 | 一种电力变压器的调容调压方法及电力变压器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US1642405A (en) * | 1924-10-06 | 1927-09-13 | Buchholz Max | Electric protective system |
US2112064A (en) * | 1937-01-21 | 1938-03-22 | Gen Electric | Method and apparatus for transformer tap changing under load |
US3206580A (en) * | 1962-08-28 | 1965-09-14 | Gen Electric | Fluid immersed tap changing switching system for transformers |
US3206569A (en) * | 1964-12-17 | 1965-09-14 | Orin P Mccarty | Protective means for transformer tap changer |
WO1995024724A1 (fr) * | 1994-03-09 | 1995-09-14 | Maschinenfabrik Reinhausen Gmbh | Systeme de commutation pour interrupteur de puissance de commutateurs a plots et pour selecteur de puissance |
JP2001509357A (ja) | 1996-12-17 | 2001-07-10 | アセア、ブラウン、ボベリ、アクチエボラーグ | 対象を過電流から保護するための、過電流低減および電流制限を有する装置及び方法 |
-
2009
- 2009-06-18 EP EP09163129A patent/EP2264729A1/fr not_active Withdrawn
-
2010
- 2010-06-17 BR BRPI1011777A patent/BRPI1011777B8/pt active IP Right Grant
- 2010-06-17 KR KR1020127001496A patent/KR101517656B1/ko active IP Right Grant
- 2010-06-17 WO PCT/EP2010/058572 patent/WO2010146131A1/fr active Application Filing
- 2010-06-17 RU RU2012101612/07A patent/RU2544844C2/ru not_active IP Right Cessation
- 2010-06-17 CN CN201080027149.9A patent/CN102460624B/zh active Active
- 2010-06-17 EP EP10725719.8A patent/EP2443641B1/fr active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9679710B1 (en) | 2016-05-04 | 2017-06-13 | Cooper Technologies Company | Switching module controller for a voltage regulator |
Also Published As
Publication number | Publication date |
---|---|
RU2012101612A (ru) | 2013-07-27 |
EP2443641A1 (fr) | 2012-04-25 |
WO2010146131A1 (fr) | 2010-12-23 |
KR101517656B1 (ko) | 2015-05-04 |
RU2544844C2 (ru) | 2015-03-20 |
BRPI1011777B1 (pt) | 2020-12-22 |
CN102460624B (zh) | 2014-12-10 |
EP2264729A1 (fr) | 2010-12-22 |
BRPI1011777B8 (pt) | 2022-12-13 |
KR20120056815A (ko) | 2012-06-04 |
BRPI1011777A2 (pt) | 2020-06-30 |
CN102460624A (zh) | 2012-05-16 |
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