Passive wireless temperature measuring device for high-voltage overhead conductor fitting

Abstract

The utility model provides a passive wireless temperature measuring device for a high-voltage overhead conductor fitting, which relates to the technical field of temperature measurement and comprises a high-voltage overhead conductor, a CT induction electricity-taking power supply, an energy storage capacitor, a temperature measuring module, a microcontroller, an analog-to-digital converter and a communication module. The CT induction electricity taking power supply takes electricity from the high-voltage overhead conductor and inputs the electricity into the energy storage capacitor; the energy storage capacitor provides stable power supply for the device; the temperature measurement module measures the temperature of the wire fitting at the position to be measured and the environment temperature. The microcontroller measures the resistance change of a temperature sensing element in the temperature measurement module through the analog-to-digital converter, converts the resistance change to obtain a temperature value, and takes the difference value between the temperature of the wire fitting at the position to be measured and the environment temperature as the temperature rise data of the wire fitting; and the communication module reports the temperature rise data to a background server. According to the utility model, the precision of wire fitting temperature measurement can be improved, and whether the wire fitting is abnormal in heating can be accurately judged.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature measurement, in particular to a passive wireless temperature measuring device for high-voltage overhead conductor hardware. Background Art

[0002] In the field of high-voltage power transmission monitoring, abnormal conditions during the operation of transmission cables are monitored. High-voltage cable joints use conductor fittings to connect different cable segments to transmit power. The conductor fittings are crimped into the cable, which can easily generate excessive temperatures at the junction of the fittings during power transmission. High temperatures can cause aging of the insulation material, thermal expansion, and accelerated oxidation of the contact points, leading to increased resistance, which can in turn cause serious consequences such as equipment failure, cable short circuits, and fires. By monitoring the temperature of power transmission conductor fittings, high-voltage transmission and substation failures can be prevented, ensuring the safe and reliable operation of the power system. Therefore, taking effective measures to monitor the contact temperature of high-voltage conductor fittings is a major issue that the power system urgently needs to address.

[0003] Currently, there are relatively few instruments specifically designed for measuring the heat generation of high-voltage conductor fittings. A common temperature monitoring method involves coating the high-voltage electrical contact surface with a luminescent material whose color changes with temperature and then roughly determining the temperature range by observing the color change. This method has low accuracy and poor reliability, and cannot provide quantitative measurements. Another method uses infrared imagers, which utilize the characteristics of infrared thermal radiation. These highly accurate, non-contact measurements are flexible and convenient to use, but their high price makes widespread application difficult. Furthermore, both methods require manual inspections, are intermittent, and lack real-time monitoring capabilities, preventing them from providing real-time temperature alarms.

[0004] Currently available wireless temperature measurement devices use a single-point temperature measurement method, attaching the device directly to the conductor fitting. They only measure the temperature of that metal fitting and lack the ability to measure the surrounding ambient temperature. However, due to heat dissipation issues associated with contact metal fittings, the measured temperature rise must account for the impact of ambient temperature. This is particularly true for outdoor overhead cables, where the ambient temperature varies widely, leading to significant differences in heat dissipation from conductor fittings. Therefore, accurate assessment of abnormal temperature changes at the contact point requires knowledge of the ambient temperature. This lack of ambient temperature as a reference results in lower accuracy in metal fitting temperature measurements. Utility Model Content

[0005] In order to solve the technical problem in the prior art that the lack of ambient temperature as a reference leads to low temperature measurement accuracy of metal parts, the utility model provides a passive wireless temperature measurement device for high-voltage overhead conductor hardware.

[0006] The technical solutions provided by the embodiments of the present invention are as follows:

[0007] The embodiment of the utility model provides a high-voltage overhead conductor hardware passive wireless temperature measurement device, comprising: a high-voltage overhead conductor, a CT induction power supply, an energy storage capacitor, a temperature measurement module, a microcontroller, an analog-to-digital converter, and a communication module;

[0008] The high-voltage overhead wire, the CT induction power supply, the energy storage capacitor, the temperature measurement module and the communication module are all connected to the microcontroller;

[0009] The CT induction power supply is connected to the high-voltage overhead wire, and the CT induction power supply draws power from the high-voltage overhead wire and inputs it into the energy storage capacitor;

[0010] The temperature measurement module, the microcontroller and the communication module are all connected to the energy storage capacitor, and the energy storage capacitor provides a stable power supply for the device;

[0011] The temperature measurement module measures the temperature of the conductor fittings and the ambient temperature at the position to be measured respectively;

[0012] The microcontroller measures the resistance change of the temperature sensing element in the temperature measurement module through the analog-to-digital converter, converts it into a temperature value, and uses the difference between the temperature of the wire fitting at the measured position and the ambient temperature as the temperature rise data of the wire fitting;

[0013] The communication module reports the temperature of the conductor fittings at the position to be measured, the ambient temperature, and the temperature rise data to the background server.

[0014] The beneficial effects of the technical solution provided by the embodiment of the utility model include at least:

[0015] (1) In the present invention, the temperature measuring device can simultaneously measure the temperature of the wire fitting and the ambient temperature, and use the difference between the temperature of the wire fitting at the measured position and the ambient temperature as the temperature rise data of the wire fitting, thereby improving the accuracy of the temperature measurement of the wire fitting and accurately judging whether the wire fitting is abnormally heated.

[0016] (2) In the present invention, CT induction is used to obtain power, and a communication module is used to report the temperature of the conductor fittings, the ambient temperature, and the temperature rise data at the measured location to the background server, thereby realizing passive wireless installation. This greatly simplifies the deployment difficulty for outdoor elevated cable construction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a passive wireless temperature measurement device for high-voltage overhead conductor hardware provided by an embodiment of the utility model;

[0019] Figure 2 This is a structural schematic diagram of a passive wireless temperature measurement device for high-voltage overhead conductor fittings provided by an embodiment of the utility model.

[0020] Reference numerals

[0021] 1. High-voltage overhead conductor; 2. CT induction power supply; 21. CT core; 3. Energy storage capacitor; 4. Temperature measurement module; 41. Temperature measurement circuit board; 42. Wire fitting temperature probe; 43. Environmental temperature probe; 5. Microcontroller; 6. Communication module; 7. Analog-to-digital converter. DETAILED DESCRIPTION

[0022] The following describes in detail the lower limb structure of a vertically standing bipedal walking robot provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0023] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0024] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0025] Reference Manual Figure 1 , shows a schematic diagram of a passive wireless temperature measurement device for high-voltage overhead conductor hardware provided by an embodiment of the present utility model.

[0026] Reference Manual Figure 2 , shows a structural schematic diagram of a high-voltage overhead conductor hardware passive wireless temperature measurement device provided by an embodiment of the present utility model.

[0027] The embodiment of the present utility model provides a passive wireless temperature measurement device for high-voltage overhead conductor hardware, comprising: a high-voltage overhead conductor 1, a CT induction power supply 2, an energy storage capacitor 3, a temperature measurement module 4, a microcontroller 5, an analog-to-digital converter 7 and a communication module 6.

[0028] The high-voltage overhead conductor 1 , the CT induction power supply 2 , the energy storage capacitor 3 , the temperature measurement module 4 and the communication module 6 are all connected to the microcontroller 5 .

[0029] The CT induction power supply 2 is connected to the high-voltage overhead conductor 1 , and the CT induction power supply 2 draws power from the high-voltage overhead conductor 1 and inputs the power into the energy storage capacitor 3 .

[0030] In the present invention, CT induction is used to draw power, and a communication module is used to report the temperature of the conductor fittings, ambient temperature, and temperature rise data at the measured location to the background server, thereby realizing passive wireless installation. This greatly simplifies the deployment difficulty for outdoor elevated cable construction environments.

[0031] The temperature measurement module 4 , the microcontroller 5 and the communication module 6 are all connected to the energy storage capacitor 3 , which provides a stable power supply for the device.

[0032] The temperature measuring module 4 measures the temperature of the conductor fittings and the ambient temperature at the position to be measured respectively.

[0033] The microcontroller unit (MCU) 5 measures the resistance change of the temperature sensing element in the temperature measurement module 4 through the analog-to-digital converter (ADC) 7, converts it into a temperature value, and uses the difference between the temperature of the wire fitting at the measured location and the ambient temperature as the temperature rise data of the wire fitting.

[0034] In the present invention, the temperature measuring device can simultaneously measure the temperature of the wire fitting and the ambient temperature, and use the difference between the temperature of the wire fitting at the measured position and the ambient temperature as the temperature rise data of the wire fitting, thereby improving the accuracy of the temperature measurement of the wire fitting and accurately judging whether the wire fitting is abnormally heated.

[0035] Optionally, the microcontroller 5 adopts a low-power Cortex-M0 microcontroller, which has the functions of performing simple threshold judgment and micro-power sleep locally.

[0036] The communication module 6 reports the conductor fitting temperature, ambient temperature and temperature rise data at the measured position to the background server.

[0037] Furthermore, the background server is responsible for functions such as temperature measurement data storage, big data analysis, and device access management. Users browse and query temperature data through clients such as the Web or mobile APP.

[0038] In one possible embodiment, the temperature measurement module 4 includes a temperature measurement circuit board 41, a wire fitting temperature measurement probe 42, and an ambient temperature measurement probe 43. Both the wire fitting temperature measurement probe 42 and the ambient temperature measurement probe 43 are connected to the temperature measurement circuit board 41. The wire fitting temperature measurement probe 42 extends to the location to be measured using a lead wire to measure the wire fitting temperature at the location to be measured. The ambient temperature measurement probe 43 is mounted on the temperature measurement circuit board 41 to measure the ambient temperature.

[0039] It should be noted that by simultaneously measuring the temperature of the conductor fittings and the ambient temperature, the temperature difference between the two can be calculated, known as the "temperature rise data," which can more accurately determine whether the conductor fittings are heating abnormally. Measuring the fitting temperature alone cannot effectively distinguish between normal ambient temperature changes and abnormal fitting temperature rise.

[0040] Optionally, the conductor fitting temperature measuring probe 42 uses a lead-type NTC resistor, a PT100 platinum thermal resistor, or other thermal sensitive elements.

[0041] Optionally, the wire fitting temperature measuring probe 42 is adhered to the position to be measured by a high-insulation thermal conductive adhesive.

[0042] This utility model utilizes a lead-type temperature probe that can be flexibly extended to the location of the conductor fittings to be monitored, adapting to the installation requirements of fittings of varying shapes, sizes, and locations. The temperature probe is separated from the temperature acquisition module, facilitating high-voltage insulation isolation and enabling convenient installation on conductor fittings of varying shapes and sizes.

[0043] In one possible embodiment, the CT inductive power supply 2 includes a CT core 21. The CT core 21 passes through the high-voltage overhead conductor 1. The power frequency current flowing through the high-voltage overhead conductor 1 generates a magnetic field. The secondary coil loop of the CT core 21 generates an induced voltage, which is input into the energy storage capacitor 3.

[0044] In a possible implementation manner, the CT core 21 adopts a semi-open-edge structure.

[0045] It should be noted that the CT core 21 adopts a semi-open-edge structure, which can be easily installed on the high-voltage overhead conductor 1.

[0046] In a possible implementation, the CT core 21 is made of silicon steel sheet or Permalloy sheet.

[0047] In a possible implementation manner, the inner ring wall of the CT core 21 is coated with an insulating and heat-insulating material.

[0048] It should be noted that insulating and thermal insulation materials can be used for high-voltage electrical isolation and heat conduction between isolation devices and hardware to avoid temperature measurement errors.

[0049] In the present invention, the probe leads and the CT induction power supply are wrapped with high-insulation materials, which effectively electrically isolate the high-voltage power cables and prevent the temperature measuring device from being damaged by high voltage breakdown.

[0050] In a possible implementation, the insulating and heat-insulating material includes an aerogel felt substrate and an insulating and heat-insulating buffer layer.

[0051] Optionally, the aerogel uses silica aerogel as the main material and is compounded into reinforcing fibers, such as glass fibers and pre-oxidized fibers, to form a flexible thermal insulation material synthesized through a special process.

[0052] Optionally, the insulating and heat-insulating buffer layer is made of soft silicone, which is wrapped on the outside.

[0053] In one possible embodiment, a rectifier module, a filter module, and a voltage regulator module are provided between the high-voltage overhead conductor 1 and the energy storage capacitor 3. The high-voltage overhead conductor 1 draws power from the high-voltage overhead conductor 1, processes the power through the rectifier module, the filter module, and the voltage regulator module, and then inputs the power to the energy storage capacitor 3.

[0054] In a possible implementation, the communication module (6) adopts a 4G or NB-IoT mode.

[0055] In this utility model, two temperature probes are used to simultaneously measure the temperature of the wire fittings and the ambient temperature, and the temperature difference is used as the temperature rise data of the wire fittings. In contrast, existing similar wireless temperature measurement devices only measure the temperature of the wire fittings, making it difficult to determine the temperature rise data of the wire fittings. The lead-type temperature probe design can be easily installed on wire fittings of different sizes and shapes, and can also facilitate the use of insulating materials for high-voltage insulation isolation. The design of wireless communication and CT induction power supply eliminates the need for wiring for the entire temperature measurement device, making installation and deployment very convenient.

[0056] This invention encompasses any alternatives, modifications, equivalents, and solutions that do not depart from the spirit and scope of this invention. To provide a thorough understanding of this invention, specific details are described in detail in the preferred embodiments of this invention, but those skilled in the art can fully understand this invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion about the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A passive wireless temperature measurement device for high-voltage overhead conductor hardware, characterized in that: include: High-voltage overhead conductors, CT induction power supply, energy storage capacitors, temperature measurement modules, microcontrollers, analog-to-digital converters, and communication modules; The high-voltage overhead wire, the CT induction power supply, the energy storage capacitor, the temperature measurement module and the communication module are all connected to the microcontroller; The CT induction power supply is connected to the high-voltage overhead wire, and the CT induction power supply draws power from the high-voltage overhead wire and inputs it into the energy storage capacitor; The temperature measurement module, the microcontroller and the communication module are all connected to the energy storage capacitor, and the energy storage capacitor provides a stable power supply for the device; The temperature measurement module measures the temperature of the conductor fittings and the ambient temperature at the position to be measured respectively; The microcontroller measures the resistance change of the temperature sensing element in the temperature measurement module through the analog-to-digital converter, converts it into a temperature value, and uses the difference between the temperature of the wire fitting at the measured position and the ambient temperature as the temperature rise data of the wire fitting; The communication module reports the temperature of the conductor fittings at the position to be measured, the ambient temperature, and the temperature rise data to the background server.

2. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 1, characterized in that: The temperature measurement module includes a temperature measurement circuit board, a conductor hardware temperature measurement probe and an environmental temperature measurement probe; The conductor fitting temperature measuring probe and the environmental temperature measuring probe are both connected to the temperature measuring circuit board; The conductor fitting temperature measuring probe is extended to the position to be measured by a lead wire to collect the temperature of the conductor fitting at the position to be measured; The ambient temperature measuring probe is arranged on the temperature measuring circuit board to collect the ambient temperature.

3. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 2, characterized in that: The conductor hardware temperature measuring probe is adhered to the position to be measured by means of high-insulation thermal conductive adhesive.

4. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 1, characterized in that: The CT induction power supply includes a CT magnetic core; The CT core passes through the high-voltage overhead conductor, and the power frequency current flowing through the high-voltage overhead conductor generates a magnetic field. The secondary coil loop of the CT core generates an induced voltage, and the induced voltage is input into the energy storage capacitor.

5. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 4, characterized in that: The CT magnetic core adopts a half-open-edge structure.

6. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 4, characterized in that: The material of the CT magnetic core is silicon steel sheet or Permalloy sheet.

7. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 4, characterized in that: The inner ring wall of the CT magnetic core is coated with insulating and heat-insulating material.

8. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 7, characterized in that: The insulating and heat-insulating material comprises an aerogel felt substrate and an insulating and heat-insulating buffer layer.

9. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 1, characterized in that: A rectifier module, a filter module and a voltage stabilizing module are provided between the high-voltage overhead conductor and the energy storage capacitor; The high-voltage overhead wire draws electricity from the high-voltage overhead wire, and after being processed by the rectifier module, the filter module and the voltage stabilizing module, the electricity is input into the energy storage capacitor.

10. The passive wireless temperature measurement device for high-voltage overhead conductor hardware according to claim 1, characterized in that: The communication module adopts 4G or NB-IoT mode.

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