Monitoring power transfer equipment

Abstract

The invention relates to a method for monitoring an electrical energy transmission device (1), wherein time-resolved operating state data (3, 4) about a current, past and / or future operating state of the electrical energy transmission device (1), environmental state data (5, 6) about a current, past and / or future environmental state in the environment of the electrical energy transmission device (1) and / or sensor data (7) acquired and / or already acquired by at least one sensor of the electrical energy transmission device (1) are recorded. A temperature profile (10) of a current, past and / or future temperature of at least one module (2, 2.1, 2.2, 2.3) of the electrical energy transmission device (1) is calculated by means of a calculation model (9) which processes the operating state data (3, 4), the environmental state data (5, 6) and / or the sensor data (7), and a thermal load of the module (2, 2.1, 2.2, 2.3) is determined from the calculated temperature profile (10) in terms of a thermal load limit of the module (2, 2.1, 2.2, 2.3).

Description

Technical Field

[0001] This invention relates to a method for monitoring electrical power transmission equipment, particularly switching devices. Background Technology

[0002] The limiting factor for the current-carrying capacity of power transmission equipment, such as switching devices, especially high-voltage switching devices, is component heating caused by electrical losses. Due to a lack of feedback on the actual heating of the components in power transmission equipment, these devices are typically operated well below their actual thermal load limits for safety reasons. In other words, power transmission equipment usually does not operate at the maximum permissible current for the current ambient temperature; therefore, the actual heating of the components in power transmission equipment is often far lower than the permissible heating.

[0003] Furthermore, power transmission equipment typically possesses such high heat capacity that it can withstand currents significantly exceeding its rated current for short periods. This potential of power transmission equipment is often left untapped.

[0004] The problem hindering the utilization of the actual thermal load capacity of electrical power transmission equipment is that the temperature of some components (such as electrical conductors) cannot currently be measured using existing technology. Consequently, it is impossible to identify when permissible temperature limits have been exceeded in the event of a fault. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to describe a method for monitoring power transmission equipment, which enables the power transmission equipment to operate up to its maximum thermal load capacity.

[0006] According to the present invention, this technical problem is solved by a method having the features of claim 1, a computer program having the features of claim 15, and an electrical power transmission device having the features of claim 16.

[0007] Advantageous designs of the present invention are the subject of the dependent claims.

[0008] In the method for monitoring power transmission equipment, particularly switching devices, according to the present invention, time-resolved operating state data regarding the current, past, and / or future operating states of the power transmission equipment, environmental state data regarding the current, past, and / or future environmental states in the environment of the power transmission equipment, and / or sensor data, which are acquired by and / or have been acquired by at least one sensor of the power transmission equipment, are recorded. A temperature profile of the current, past, and / or future temperatures of at least one module of the power transmission equipment is calculated using a computational model that processes the operating state data, environmental state data, and / or sensor data. The thermal load of the module is determined based on the calculated temperature profile and the module's thermal load limit.

[0009] By considering time-resolved operational status data regarding the operating state of the power transmission equipment, environmental status data regarding the environmental conditions within the power transmission equipment, and / or sensor data, the method according to the invention enables the precise determination of temperature profiles for each module. Time-resolved data is understood herein as data associated with specific points in time, for example, in a manner where each data point has a digital timestamp. By considering the time-resolved operational status data and environmental status data, sensor data collected, for example, at the power transmission equipment or at various measurement points within the power transmission equipment, can be used to directly or indirectly determine the temperature at those measurement points, so as to also calculate and, in particular, predict the temperatures at other locations within the power transmission equipment and the temperature profiles for each module. Thus, only a few sensors are needed to determine the temperature profiles for each module, and temperatures and temperature profiles can also be calculated for locations or modules where temperature data is not available or cannot be collected using measurement techniques.

[0010] The precise and comprehensive calculation of the temperature profiles for each module enables the operation of the power transmission equipment under its thermal load limits and short-term overload operation, thereby maximizing the utilization of the power transmission equipment's thermal load capacity and thus its actual potential. Furthermore, this precise and comprehensive calculation improves the operational reliability of the power transmission equipment by identifying, eliminating, predicting, and preventing localized overheating. In addition, the calculation of the temperature profiles for each module can advantageously serve as the basis for improved regulation of active cooling of the power transmission equipment.

[0011] In one embodiment of the invention, the computational model mathematically simulates the operation of at least one module, includes a mathematical model of at least one module, and / or evaluates module data regarding the geometric, physical, and / or chemical properties of at least one module. Thus, by taking into account the specific characteristics of each module in the computational model, the accuracy of temperature calculations can be advantageously improved.

[0012] In another embodiment of the invention, the utilization rate of the current and / or at least one past and / or future power transmission device is determined based on at least one calculated temperature profile according to the thermal load limit of at least one module. The utilization rate of the power transmission device is understood as the utilization of the power transmission device relative to its maximum permissible utilization. For example, the utilization rate is defined by the thermal load relative to the maximum permissible thermal load. Determining the utilization rate advantageously enables a quantitative assessment of the utilization of the power transmission device and thereby facilitates its optimization.

[0013] In another embodiment of the invention, the thermal load of at least one module and / or the utilization rate of the power transmission equipment are visualized based on the thermal load limit of that module. Visualization may include, for example, a color representation of at least one module, the color of which is correlated with the module's thermal load limit and a temperature calculated for that module. Furthermore, it may be specified that a time period for visualizing the thermal load of at least one module and / or the utilization rate of the power transmission equipment can be set. Such visualization advantageously enables a rapid overview of the thermal load and utilization of the power transmission equipment and, in particular, makes it possible to identify modules with high thermal loads and potential optimizations for the operation of the power transmission equipment.

[0014] In another design of the invention, the thermal load limit of the module is defined as a module-specific temperature threshold. This achieves a suitable and simple quantitative determination of the load limit.

[0015] In another design of the present invention, a warning is generated if the temperature curve calculated for the module exceeds the temperature threshold defined for the module. This automatically alerts the power transmission equipment to overload operation or warns of overload conditions.

[0016] In another design of the invention, a tolerance duration is defined, and a warning is only output when the temperature curve calculated for the module exceeds the temperature threshold defined for that module for a period longer than the tolerance duration. This advantageously tolerates only short-term and therefore non-critical overloads of the module, thereby preventing unnecessary shutdowns of the module or the entire power transmission device.

[0017] In another embodiment of the invention, if the deviation between the module temperature calculated by the computational model for a given time point and the module temperature measured at that time point exceeds a predetermined absolute or relative tolerance value, a warning is output. This advantageously indicates a potential error in the computational model or the calculation performed using the computational model.

[0018] In another embodiment of the invention, operating settings for the power transmission device are defined based on the temperature of at least one module, and operating prompts for the operating settings are output based on at least one calculated temperature curve, and / or the operating settings are automatically configured based on at least one calculated temperature curve. This enables the automatic generation of prompts for optimizing the operation of the power transmission device, or even the automatic optimization of the operation of the power transmission device.

[0019] In another embodiment of the invention, the operating status data includes information about the switching status of at least one electrical switching unit, the operating status of at least one active cooling device, and / or the electrical operating current and / or power of at least one component and / or the entire power transmission device. This operating status data is particularly relevant for determining the thermal load of the power transmission device and is therefore particularly suitable for calculating temperature profiles.

[0020] In another embodiment of the invention, the environmental condition data includes information about temperature, wind speed, precipitation, air humidity, and / or the intensity of electromagnetic radiation in the environment of the power transmission equipment. This environmental condition data is particularly relevant for determining the thermal load of the power transmission equipment and is therefore especially suitable for calculating temperature profiles.

[0021] In another embodiment of the invention, the sensor data includes temperature collected at the power transmission device or at at least one measuring point within the power transmission device. This advantageously allows for the consideration and evaluation of the actual temperature of the power transmission device to calculate a temperature profile.

[0022] In another embodiment of the invention, the computational model is modularly constructed using libraries to consider the various modules. Thus, the computational model can be advantageously adapted to variations in power transmission equipment and used with different power transmission devices.

[0023] In another embodiment of the invention, operational status data, environmental status data, and / or sensor data are at least partially recorded in a data cloud and / or a temperature curve for at least one module is calculated in the data cloud using a computational model. This allows for advantageous retrieval and use of the operational status data, environmental status data, and / or sensor data, and / or the calculated temperature curve, independent of location and user. Furthermore, it can be specified that the operational status data, environmental status data, and / or sensor data, and / or the calculated temperature curve can be downloaded from the data cloud and used offline.

[0024] The computer program according to the invention includes instructions that, when implemented by a control unit or in a data cloud, cause the control unit or data cloud to implement the method according to the invention.

[0025] The power transmission device according to the invention includes a control unit or a connection to a data cloud, on which a computer program according to the invention is implemented, and in which the computer program according to the invention is implemented in the data cloud. Attached Figure Description

[0026] The features, characteristics, advantages, and implementations of the invention described above will become clearer and more apparent in conjunction with the following description of embodiments, which are illustrated in more detail with reference to the accompanying drawings. In the drawings:

[0027] Figure 1 A structural diagram of an embodiment of the method for monitoring power transmission equipment according to the present invention is shown.

[0028] Figure 2 The graph illustrating the temperature of the modules in the power transmission device provides the first visualization of the power transmission device.

[0029] Figure 3 A second visualization of the power transmission device is shown, illustrating the temperature of the modules within the device.

[0030] Figure 4 A visualization of the time curves of the utilization rate and input current of the power transmission equipment is shown. Detailed Implementation

[0031] Figure 1 An illustration of a method for monitoring different modules 2 according to the present invention is shown (see Figure 2 A structural diagram of an embodiment of the method of power transmission device 1.

[0032] In this method, for example, time-resolved operating state data 3 regarding the current and past operating states of the power transmission device 1, operating state data 4 regarding the future operating states of the power transmission device 1, environmental state data 5 regarding the current and past environmental states in the environment of the power transmission device 1, environmental state data 6 regarding the future environmental states in the environment of the power transmission device 1, sensor data 7 collected by at least one sensor of the power transmission device 1 and / or already collected by at least one sensor of the power transmission device 1, and module data 8 regarding the geometric, physical and / or chemical properties of at least one module 2 are recorded in a data cloud.

[0033] Using computational model 9, which processes operational status data 3, 4, environmental status data 5, 6, and / or sensor data 7 and module data 8, temperature curves 10 are calculated for the current, past, and / or future temperatures of different modules 2 of the power transmission equipment 1. Based on the calculated temperature curves 10, the thermal load of module 2 is determined according to its thermal load limit. For example, computational model 9 can be implemented in a data cloud. For example, the thermal load limit of module 2 can be defined based on data tables describing module 2, safety rules, and / or standards. The thermal load limit of module 2 is defined as a temperature threshold specific to module 2.

[0034] Furthermore, based on the calculated temperature curve 10, the current and / or at least one past and / or future heat load rate of at least one module 2 is determined according to its heat load limit, and / or the current and / or at least one past and / or future thermal utilization rate D of the power transmission device 1 is determined based on the heat load limit of module 2. The load rate of module 2 is defined, for example, as the deviation between the temperature calculated for module 2 and a temperature threshold defined for module 2, or the ratio of that deviation to the temperature threshold. The determined load rate and utilization rate D are visualized using visualization 11, see [link to visualization]. Figures 2 to 4 And its description.

[0035] Furthermore, it can be specified that if the temperature curve 10 calculated for module 2 exceeds the temperature threshold defined for module 2, a warning 12 will be generated. Alternatively or additionally, it can be specified that a tolerance duration is defined, and the warning 12 will only be output if the time for which the temperature curve calculated for module 2 exceeds the temperature threshold defined for module 2 is longer than the tolerance duration. This advantageously tolerates only short-term and therefore non-critical overloads of module 2, thereby avoiding unnecessary shutdowns of module 2 or the entire power transmission device 1. Furthermore, if the deviation between the temperature of module 2 calculated by calculation model 9 at a given time point and the temperature of module 2 measured at that time point is greater than a pre-defined absolute or relative tolerance value, a warning 12 can be output.

[0036] Furthermore, operating settings for the power transmission device 1 are defined based on the temperature of module 2, and operating prompts 13 are generated based on the calculated temperature curve 10, and / or the operating settings are automatically configured based on the calculated temperature curve 10. Such operating settings may include, for example, changing the electrical operating current of components and / or the entire power transmission device 1, or switching the active cooling device on or off. Additionally, the operating prompts 13 may suggest maintenance or replacement of one or more individual components of the power transmission device 1, such as bus replacement.

[0037] Operating status data 3 and 4 contain information, for example, regarding the switching status of at least one electrical switching unit, the operating status of at least one active cooling device, and / or the electrical operating current and / or electrical power of at least one component and / or the entire power transmission device 1. Operating status data 3, regarding the current and past operating states of the power transmission device 1, is provided, for example, by a control unit that controls the power transmission device 1. Operating status data 4, regarding the future operating state of the power transmission device, is obtained, for example, from manually or automatically generated operating specifications 14 for the operation of the power transmission device 1 and / or from generated operating prompts 13.

[0038] Environmental state data 5 and 6 contain information, for example, regarding temperature, wind speed, precipitation, air humidity, and / or the intensity of electromagnetic radiation (e.g., solar radiation) in the environment of the power transmission equipment 1. Environmental state data 5 regarding the current and past environmental states in the environment of the power transmission equipment 1 is provided, for example, by a weather station, individual measuring equipment, and / or by a database of a data cloud. Environmental state data 6 regarding the future environmental states in the environment of the power transmission equipment 1 is obtained, for example, from weather forecasts 15 regarding the environment of the power transmission equipment 1 and / or from user input 16 manually performed by the user or operator of the power transmission equipment 1.

[0039] Sensor data 7 includes, in particular, temperature collected at the power transmission device 1 or at at least one measuring point within the power transmission device 1.

[0040] For example, the module data 8 for module 2 can be obtained from the data table describing module 2.

[0041] Figure 2 and Figure 3 Visualization 11 of the power transmission device 1 is shown with temperature diagrams of module 2 of the power transmission device 1. In this example, the power transmission device 1 is a switching device, and its module 2 is, among other things, an isolating switch module 2.1 having a switching unit designed as an isolating switch, a circuit breaker module 2.2 having a switching unit designed as a circuit breaker, and an output module 2.3 having a switching unit designed as a grounding switch. Figure 2 A three-dimensional visualization 11 is shown using an actual illustration of the power transmission device 1. Figure 3 A two-dimensional visualization 11 is shown in the form of a circuit diagram of the power transmission device 1. The temperatures calculated for each module 2 are represented by the color of module 2, where the color (representing module 2) is associated with the calculated temperature based on the heat load limit of module 2. For example, a temperature range is defined for each module 2 based on its heat load limit, and each temperature range is associated with a color. For example, if the calculated temperature for module 2 exceeds the temperature threshold defined for module 2, module 2 is displayed in red. Correspondingly, if the calculated temperature for module 2 is significantly lower than the temperature threshold defined for module 2, module 2 may be displayed, for example, in green; in cases where the temperature is higher than the temperature threshold, in yellow; and in cases where the temperature is within a temperature range, the upper limit of which is the temperature threshold defined for module 2. Different colors are used in... Figure 2 and Figure 3 Different shaded lines are used to represent them.

[0042] Figure 4The visualization of the utilization rate D and input current I of the power transmission device 1 is illustrated exemplarily in the form of curves D(t) of utilization rate D and I(t) depending on time t. A time period Δt can be set to determine and display curves D(t) and I(t). Furthermore, parameters can be selected via selection menu 20 with buttons 21 to 25, alternatively or additionally displaying the time curve of that parameter within the time period Δt. For example, button 21 is associated with the utilization rate D of the power transmission device 1, button 22 is associated with the input current I of the power transmission device 1, and other buttons 23 to 25 are associated with other parameters, such as parameters characterizing environmental conditions, such as temperature, wind speed, precipitation, air humidity, or radiation intensity in the environment of the power transmission device 1, or operating characteristic parameters of the power transmission device 1, such as the switching state of the switching unit of the power transmission device 1 or the heat load rate of each module 2.

[0043] Although the invention has been described and illustrated in more detail through preferred embodiments, the invention is not limited to the disclosed examples and other variations can be derived by those skilled in the art without departing from the scope of protection of the invention.

Claims

1. Method for monitoring an electric energy transmission device (1), wherein - time-resolved operating state data (3, 4) about a current, past and / or future operating state of the electric energy transmission device (1), environmental state data (5, 6) about a current, past and / or future environmental state in the environment of the electric energy transmission device (1) and / or sensor data (7) are recorded, which are collected and / or have been collected by at least one sensor of the electric energy transmission device (1), - a temperature profile (10) of a current, past and / or future temperature of at least one module (2, 2.1, 2.2, 2.3) of the electric energy transmission device (1) is calculated by means of a calculation model (9) which processes the operating state data (3, 4), the environmental state data (5, 6) and / or the sensor data (7), and - a thermal load of the module (2, 2.1, 2.2, 2.3) is determined from the thermal load limit of the module (2, 2.1, 2.2, 2.3) in dependence on the calculated temperature profile (10), characterized in that - a utilization (D) of the electric energy transmission device (1) is determined from the thermal load limit of at least one module (2, 2.1, 2.2, 2.3) in dependence on at least one calculated temperature profile (10), wherein the utilization is defined by the thermal load in relation to the maximum permissible thermal load, or - an operating setting of the electric energy transmission device (1) is defined which depends on the temperature of at least one module (2, 2.1, 2.2, 2.3), and an operating tip (13) for the operating setting is output in dependence on at least one calculated temperature profile (10) and / or an operating setting is automatically made in dependence on at least one calculated temperature profile (10).

2. The method of claim 1, wherein, The calculation model (9) mathematically models the operation of at least one module (2, 2.1, 2.2, 2.3), has a mathematical model of at least one module (2, 2.1, 2.2, 2.3) and / or evaluates module data (8) about the geometric, physical and / or chemical properties of at least one module (2, 2.1, 2.2, 2.3).

3. The method of claim 1 or 2, wherein, The thermal load of at least one module (2, 2.1, 2.2, 2.3) is visualized in dependence on the thermal load limit of the module and / or the utilization (D) of the electric energy transmission device (1) is visualized.

4. The method of claim 3, wherein, The visualization (11) comprises a color representation of at least one module (2, 2.1, 2.2, 2.3), the color of which is associated with the calculated temperature for the module (2, 2.1, 2.2, 2.3) in dependence on the thermal load limit of the module (2, 2.1, 2.2, 2.3). The thermal load limit of a module (2, 2.1, 2.2, 2.3) is defined as a temperature threshold value which is specific to the module (2, 2.1, 2.2, 2.3).

5. The method of claim 1 or 2, wherein, 2. Method according to claim 1, wherein - the thermal load limit of at least one module (2, 2.1, 2.2, 2.3) is determined from at least one calculated temperature profile (10) in dependence on the thermal load limit of the module (2, 2.1, 2.2, 2.3), and - the utilization (D) of the electric energy transmission device (1) is determined from at least one calculated temperature profile (10) in dependence on the thermal load limit of at least one module (2, 2.1, 2.2, 2.3), wherein the utilization is defined by the thermal load in relation to the maximum permissible thermal load. - the visualization (11) comprises a color representation of at least one module (2, 2.1, 2.2, 2.3), the color of which is associated with the calculated temperature for the module (2, 2.1, 2.2, 2.3) in dependence on the thermal load limit of the module (2, 2.1, 2.2, 2.3). - the thermal load limit of a module (2, 2.1, 2.2, 2.3) is defined as a temperature threshold value which is specific to the module (2, 2.1, 2.2, 2.3).

6. The method of claim 5, wherein, If the temperature profile (10) calculated for a module (2, 2.1, 2.2, 2.3) exceeds a temperature threshold defined for the module (2, 2.1, 2.2, 2.3), a warning prompt (12) is generated.

7. The method of claim 6, wherein, A tolerance duration is defined, and the warning prompt (12) is output only if the temperature profile (10) calculated for a module (2, 2.1, 2.2, 2.3) exceeds a temperature threshold defined for the module (2, 2.1, 2.2, 2.3) for longer than the tolerance duration.

8. The method of claim 1 or 2, wherein, The operating state data (3, 4) have information about the switching state of at least one electrical switching unit, the operating state of at least one active cooling device, and / or the electrical operating current and / or the electrical power of at least one component of the electrical energy transmission device (1) and / or the entire electrical energy transmission device (1).

9. The method of claim 1 or 2, wherein, The environmental state data (5, 6) have information about the temperature, the wind speed, the precipitation, the air humidity, and / or the radiation intensity of electromagnetic radiation in the environment of the electrical energy transmission device (1).

10. The method of claim 1 or 2, wherein, The sensor data (7) include temperatures recorded at the electrical energy transmission device (1) or at at least one measuring point in the electrical energy transmission device.

11. The method of claim 1 or 2, wherein, The calculation model (9) is modularly constructed with a library for each module (2, 2.1, 2.2, 2.3).

12. The method of claim 1 or 2, wherein, The operating state data (3, 4), the environmental state data (5, 6), and / or the sensor data (7) are at least partially recorded in a data cloud and / or the temperature profile (10) of at least one module (2, 2.1, 2.2, 2.3) is calculated in the data cloud with the aid of the calculation model (9).

13. A computer program comprising instructions which, when the computer program is implemented by a control unit or in a data cloud, cause the control unit or the data cloud to carry out the method according to any one of claims 1 to 12.

14. An electrical energy transmission device (1) having a control unit or a connection to a data cloud, on which control unit the computer program according to claim 13 is implemented, in which data cloud the computer program according to claim 13 is implemented.

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