METHOD FOR MAINTAINING AN ELECTRICAL COMPONENT

Abstract

A method for maintaining a first electrical component includes the following: Temperature measurement values recorded at the first electrical component are stored as a first set of measurement data, and temperature measurement values recorded at least at one second and one third electrical component are stored as second and third sets of measurement data. Taking into account the three sets of measurement data, a verification is carried out to determine whether a maintenance operation is necessary at the first component. There is also described a data-processing system for carrying out the method.

Claims

1-10. (canceled)

11. A method for maintaining a first electrical component, the method comprising: storing temperature measurement values recorded at the first electrical component as first measurement data; storing temperature measurement values recorded at a second electrical component and at a third electrical component as second and third measurement data, respectively; checking whether a maintenance operation and/or a control measure is necessary at the first component taking into account the first, second, and third measurement data.

12. The method according to claim 11, wherein the checking step comprises comparing the measurement data with one another and taking into account differences between the measurement data.

13. The method according to claim 12, which comprises forming a measurement data mean value and forming a first measurement data difference between the first measurement data and the measurement data mean value, and, in the checking step, comparing the first measurement data difference with a difference threshold value.

14. The method according to claim 11, wherein the checking step comprises forming a temperature change from the first measurement data.

15. The method according to claim 14, wherein the checking step comprises comparing a temperature increase with a reference temperature increase.

16. The method according to claim 11, wherein the checking step comprises comparing the first measurement data with environmental temperature measurement data recorded at the first component.

17. The method according to claim 11, wherein the checking step comprises taking into account operating data of the electrical component.

18. The method according to claim 11, wherein the checking step comprises taking into account a calibration of the temperature measurement.

19. The method according to claim 11, wherein the checking step comprises checking whether the measurement data or a variable derived therefrom meet a plurality of predetermined conditions, wherein a separate maintenance instruction is assigned to each condition, and the maintenance instruction is triggered if the allocated condition is present.

20. A data processing system configured to carry out the method according to claim 11.

Description

[0020] The invention is explained in more detail hereinafter using exemplary embodiments which are represented in FIGS. 1 to 3.

[0021] FIG. 1 shows an example of electrical components which are suitable for maintenance by means of the method according to the invention;

[0022] FIG. 2 shows a first exemplary embodiment of a method according to the invention;

[0023] FIG. 3 shows a second exemplary embodiment of the method according to the invention.

[0024] FIG. 1 represents an arrester bank 1 with twenty identical surge arresters 2. Each surge arrester comprises an outer insulator 3 as well as a high-voltage terminal 4 for connection to a high-voltage line 5. At the high-voltage terminal 4, temperature is measured at each surge arrester by means of its own sensor 6 placed there and is sent as measurement data to an evaluation unit in the form of a data processing system 7. Comparing the measurement data makes it possible to check whether the surface temperature of one of the surge arresters deviates from the rest and therefore a maintenance operation may be necessary.

[0025] FIG. 2 is a schematic representation of the course of an evaluation of the measurement data which have been transmitted from three electrical components. In a first method step 101, first measurement data Th1 of a temperature sensor of a first component are stored (as a data series Th1(t)). Correspondingly, second and third measurement data Th2 or Th3 of one second and one third component are stored in two method steps 102 and 103 which are performed simultaneously or consecutively, for example. In a fourth method step 104, a mean value ThM(t) is formed as ⅓ *(Th1(t)+Th2(t)+Th3(t)). In a fifth method step 105, a first measurement data difference DeltaTh1(t)=Th1(t)−ThM(t) is calculated. In the following, two cases are distinguished: if a check 106 shows that the first measurement data difference reaches or exceeds a predetermined difference threshold value x, a maintenance instruction is output or the measurement data are analyzed more closely in a seventh method step 107. If the check 106 shows that the measurement data difference is below the difference threshold value, information is displayed that the first component does not require any maintenance measures in an eighth method step 108.

[0026] One further possibility of the evaluation is represented schematically in FIG. 3. In a first method step 201, measurement data which is transmitted from a sensor of a first electrical component, in particular a measurement data point Th is stored in a storage device of a data processing system. In a second method step 202, it is checked whether the measurement data point value reaches or exceeds a maximum temperature Tmax. If this is the case, further analysis of the measurement data is carried out in a third method step 203. If this is not the case, an absolute difference dTh between the measurement data point and an outside temperature Ta measured at the component and transmitted is formed in a fourth method step 204: dTh=|Th−Ta|. In a fifth method step, it is checked whether the absolute difference dTh is below a lower limit value T1, is equal to the or above an upper limit value T2 or is between the lower and upper limit value T1<=dTh<T2. If dTh>=T2, further analysis is carried out in method step 203, in order to examine the case more closely and, if applicable, the measures that should be taken. If dTh<T1, information is provided in a sixth method step 206 that a higher capacity utilization is possible for the first component or the system in which the component is used. If T1<=dTh<T2, information is provided in a seventh method step 207 that the component can be operated in nominal load operation.

[0027] With the arrangement of the temperature sensor directly on the active part of the component, one further conceivable variant is provided. Depending on the application, more accurate information regarding the state of the component can be achieved if the temperature sensor is installed at the hot point of the active part of the component. In this case, the comparative method described above can be applied in order to identify an impending error, despite the fact that the component operating at partial load has not (yet) reached the maximum permissible temperature limits, for example.

[0028] The two approaches from FIGS. 2 and 3 are not necessarily alternative and can be executed in combination within the context of the invention.