HIGH-VOLTAGE DEVICE AND METHOD FOR ASCERTAINING THE RISK OF CONDENSATION IN CABINETS IN A HIGH-VOLTAGE DEVICE OF THIS KIND

Abstract

A method ascertains the risk of condensation in an enclosure of a high-voltage device. The interior temperature in the enclosure is ascertained using an interior temperature sensor arranged in the enclosure, thereby obtaining interior temperature values TI. An exterior temperature of the enclosure is ascertained using an exterior temperature sensor arranged outside of the enclosure, thereby obtaining exterior temperature values TA. The interior temperature values TI and the exterior temperature TA values are transmitted to a data processing unit. The data processing unit ascertains a temperature difference value TD by calculating the difference between the interior temperature value TI and the exterior temperature values TA based on TD=TI−TA. The data processing unit generates a warning signal if the temperature difference value TD lies below 3° C.

Claims

1-12. (canceled)

13. A method for ascertaining a risk of condensation in a cabinet of a high-voltage device, which comprises the steps of: ascertaining a cabinet interior temperature in the cabinet by obtaining interior temperature values TI by an interior temperature sensor disposed in the cabinet; ascertaining an exterior temperature of the cabinet by obtaining exterior temperature values TA by an exterior temperature sensor disposed outside the cabinet; transmitting the interior temperature values TI and the exterior temperature values TA to a data processor; calculating, via the data processor, a difference between the interior temperature values TI and the exterior temperature values TA to ascertain a temperature difference value TD according to TD=TI−TA; and generating, via the data processor, a warning signal if the temperature difference value TD is below 3 degrees Celsius.

14. The method according to claim 13, which further comprises ascertaining, via the data processor, a change in the temperature difference values TD as a function of time.

15. The method according to claim 13, wherein the data processor detects a state of an open cabinet door if the temperature difference value TD drops below 3 degrees Celsius within 1 to 3 minutes.

16. The method according to claim 15, which further comprises ascertaining a number of states of the open cabinet door within a predefined period of time.

17. The method according to claim 14, which further comprises detecting, via the data processor, a failure of a heating device disposed in the cabinet if the temperature difference value TD drops below 3 degrees Celsius within a period of time of more than three minutes.

18. The method according to claim 13, wherein the data processor concludes that an additional heating device of the cabinet has failed, and delivers a corresponding warning signal, in an event of an exterior temperature value TA being below −33 degrees Celsius and an interior temperature value TI being less than −30 degrees Celsius.

19. The method according to claim 13, wherein: the interior temperature sensor and the exterior temperature sensor are connected to a communication unit via a short-range communication connection; the communication unit being connected to the data processor via a long-range communication connection; and the data processor is a data processing cloud.

20. The method according to claim 19, wherein the communication unit has a local storage unit and a processor, the interior temperature values TI and exterior temperature values TA transmitted by the interior and exterior temperature sensors are stored locally on the local storage unit.

21. The method according to claim 19, wherein the communication unit has an antenna for position determination.

22. A high-voltage device, comprising: a cabinet; an interior temperature sensor disposed in said cabinet; an exterior temperature sensor disposed outside of said cabinet in proximity thereto; a communication unit connected to said interior temperature sensor and said exterior temperature sensor via a short-range communication connection; and a data processor connectable to said communication unit, said data processor configured to carry out the method according to claim 13.

23. A non-transitory storage medium storing computer executable instruction for performing a method for ascertaining a risk of condensation in a cabinet of a high-voltage device, the method comprises the steps of: ascertaining a cabinet interior temperature in the cabinet by obtaining interior temperature values TI by an interior temperature sensor disposed in the cabinet; ascertaining an exterior temperature of the cabinet by obtaining exterior temperature values TA by an exterior temperature sensor disposed outside the cabinet; transmitting the interior temperature values TI and the exterior temperature values TA to a data processor; calculating, via the data processor, a difference between the interior temperature values TI and the exterior temperature values TA to ascertain a temperature difference value TD according to TD=TI−TA; and generating, via the data processor, a warning signal if the temperature difference value TD is below 3 degrees Celsius.

Description

[0031] Further expedient configurations and advantages of the invention are the subject of the description of exemplary embodiments of the invention that follows with reference to the figures of the drawing, in which identical reference signs indicate identically acting components and in which

[0032] FIG. 1 schematically shows an exemplary embodiment of the high-voltage device according to the invention,

[0033] FIG. 2 schematically shows a switchgear cabinet of the high-voltage device shown in FIG. 1, and

[0034] FIG. 3 schematically shows the high-voltage device shown in FIG. 1 in conjunction with a data processing cloud to illustrate the method according to the invention.

[0035] FIG. 1 shows a high-voltage device 20 embodied as a high-voltage circuit breaker. The high-voltage circuit breaker has three switch terminals 1, 2, 3. Each switch terminal 1, 2, 3 is equipped with an upper and a middle outdoor connection, each of which is used to connect an air-insulated connecting line 4. The outdoor connections are spaced apart from one another by an elongate hollow insulator column, the interior of the insulator column having a permanently installed fixed contact arranged in it that has a moving contact opposite it in the longitudinal direction. By introducing a lifting movement into the moving contact it is possible for the contact pieces in contact with one another to be separated from one another, or vice versa. When the contact pieces of the switch terminals 1, 2, 3 are in contact with one another, current can flow via the respective switch terminal 1, 2, 3. When the contact pieces are separate from one another, that is to say when the switch terminals 1, 2, 3 are open, the current path via the switch terminals 1, 2, 3 is broken.

[0036] All of the insulator columns are mounted on a shared support frame 5 that is firmly supported on the ground by way of expedient feet. Beneath the support frame 5 it is possible to see a switchgear cabinet 6, the cabinet door of which is closed in FIG. 1.

[0037] FIG. 2 shows the switchgear cabinet 6 with the cabinet door open. It can be seen that the switchgear cabinet 6 contains a drive device 7. The interior of the drive unit 7 contains a switch-on spring and a switch-off spring, which are illustrated schematically in FIG. 2. If the switch is switched on and if a lock on the tensioned switch-off spring is released, the switch-off spring relaxes. The drive movement produced thereby is introduced into the moving contact of the respective switch terminal 1, 2, 3 by way of a kinematic chain 8. The switch 20 is now switched off, which means that a flow of current via the contacts of the switch terminals 1, 2, 3 is prevented. To switch on the switch 20, the tensioned switch-on spring in the drive cabinet 7 is relaxed and this drive movement is introduced into the moving contacts, as a result of which each moving contact is brought into contact with the respective fixed contact. A control device 9 arranged in the switchgear cabinet 6 is used to trigger the respective switching process, said control device being connected to the drive device 7 and designed to release the respective lock, as a result of which the switch-on or switch-off spring is released and relaxes.

[0038] An interior temperature sensor 10 can also be seen in the switchgear cabinet 6, said interior temperature sensor being connected to a communication unit 12 via a short-range communication connection 11. The communication unit 12 is connected to a data processing cloud, which is not depicted in FIG. 2, via a long-range communication connection 13, which is indicated only schematically. To avoid condensation water in the switchgear cabinet 6, there is provision in the cabinet 6 for a heating device 14 that causes an increase in the interior temperature in the cabinet 6, as a result of which the interior temperature is greater than the exterior temperature.

[0039] Referring again to FIG. 1, it is possible to see that the high-voltage circuit breaker 20 has an exterior temperature sensor 15 that is likewise connected to the communication unit 12 on the switchgear cabinet 6 via a short-range communication connection 11. The short-range communication connection 11 between the interior temperature sensor in the interior of the cabinet 6, which is not representatively depicted there, and the communication unit 12 is indicated schematically in FIG. 1.

[0040] The interior temperature sensor 10 records the interior temperature as a function of time, the analog measurement signal from the interior temperature sensor 10 being sampled and samples being digitized by obtaining interior temperature measured values T.sub.I. The digitized temporally resolved interior temperature measured values T.sub.I are transmitted to the communication unit 12 via the short-range communication connection 11. The communication unit 12 has at least one processor and a storage unit, the incoming interior temperature values T.sub.I and incoming temporally resolved exterior temperature values T.sub.A expediently being able to be averaged.

[0041] FIG. 3 shows the high-voltage circuit breaker 20 and a data processing cloud 16, which is connected to the communication unit 12 via said long-range communication connection 13.

[0042] It is also possible to see a user tablet 17 in FIG. 3, said user tablet likewise being connected to the data processing cloud 16 via a long-range communication connection 13. The data processing cloud 16 receives the interior temperature values T.sub.I and the exterior temperature values T.sub.A from the communication unit 12, the measured values each having a firmly assigned time value. The data processing cloud 16 forms the temperature difference value T.sub.D by deducting the exterior temperature value T.sub.A from the interior temperature value T.sub.I, which is higher on account of the heating device. If the temperature difference value T.sub.D thus formed drops below a threshold value of 3 degrees Celsius or 3 degrees Kelvin, there is a risk of condensation. The data processing cloud 16 then generates a warning signal 18, which is transmitted to the user tablet 17 in this case. After receiving the warning signal 17, e.g. the user uses his tablet 17 to connect to the data processing cloud 16 via the long-range communication connection 13. This is accomplished by inputting so-called user data or login data, which, in the exemplary embodiment shown, comprise a user name and a password associated with the user name. After the user data have been input, the connection between the data processing cloud 16 and the user tablet 17 is made, the data processing cloud 16 producing a visual display, for example, that can be used to representatively display the operating state of an energy supply grid or specifically the high-voltage circuit breaker 20 shown in FIG. 1.

[0043] The temperature difference value T.sub.D can therefore be used to indicate a risk of condensation. Furthermore, the temperature difference value T.sub.D measured in temporally resolved fashion also allows specific events or states to be detected. As such, the invention involves the conclusion being drawn that the cabinet door is open if the temperature difference value T.sub.D drops rapidly and falls from a value that is almost constant over time, for example 10 degrees Celsius, to 3 degrees Celsius within 2 minutes. This kind of rapid cooling suggests that the cabinet door is open.

[0044] If the decrease in the temperature difference value T.sub.D from 10 degrees Celsius to 2 degrees Celsius is slower and takes 10 minutes, for example, it is possible to rule out the possibility of the cabinet door being open. In this case, the functionality of the heating device 14 is doubtful instead, which means that a corresponding warning signal 18 is sent to the user tablet 17.

[0045] Low exterior temperatures of less than −33 degrees necessitate an additional heating device that assists the heating device 14 in the cabinet 6. The invention allows detection of whether this additional heating device is faulty. This is the case if the interior temperature value drops below −30 degrees Celsius for exterior temperatures of less than −33 degrees Celsius. If the data processing cloud 16 detects such a fall in the interior temperature value T.sub.I, a corresponding warning signal is delivered.