Wireless multi-point temperature measurement system and method for high-voltage switch cabinet

Abstract

The invention relates to the technical field of high-voltage switch cabinet temperature measurement, in particular to a wireless multi-point temperature measurement system and method for a high-voltage switch cabinet, and the system comprises a housing, and an acquisition module, a control module, a transmission module and an energy storage module which are used for protecting the interior. The acquisition module is used for accurately acquiring temperature data from each temperature measurement point in the high-voltage switch cabinet and transmitting the temperature data to the control module for processing; the control module is used for acquiring the temperature data acquired by the acquisition module and processing the temperature data; the transmission module is used for transmitting the acquired temperature data to a remote monitoring center; and the energy storage module is used for obtaining electric energy from the high-voltage power grid through electromagnetic induction and carrying out energy storage and management. The beneficial effects of the invention are that the system can achieve the real-time monitoring of the temperatures of a plurality of key parts of the high-voltage switch cabinet, and completely covers all important parts. By adopting the wireless sensor and the communication technology, the system avoids the complex wired wiring requirement, and the installation process is greatly simplified.

Description

Technical Field

[0001] The invention relates to the technical field of temperature measurement of high-voltage switch cabinets, and in particular to a wireless multi-point temperature measurement system and method for high-voltage switch cabinets. Background Art

[0002] The existing temperature monitoring device of high-voltage switchgear cannot fully cover all key parts of the entire switchgear, and the existing technology requires a large number of sensors and connecting wires, the installation process is complicated, and it may also cause signal interference or poor contact. Data cannot be transmitted and processed in time, which reduces the fault response speed and cannot perform intelligent analysis on the large amount of collected temperature data. Summary of the invention

[0003] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] In a first aspect, the present invention provides the following technical solutions: a wireless multi-point temperature measurement system for a high-voltage switch cabinet, comprising a housing for protecting an acquisition module, a control module, a transmission module and an energy storage module arranged inside;

[0006] The acquisition module is used to accurately obtain temperature data from each temperature measurement point in the high-voltage switch cabinet and transmit it to the control module for processing;

[0007] The control module obtains the temperature data collected by the acquisition module and processes the temperature data;

[0008] Transmission module, which transmits the collected temperature data to the remote monitoring center;

[0009] The energy storage module is used to obtain electrical energy from the high-voltage power grid through electromagnetic induction and to store and manage energy.

[0010] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the housing includes a snap-fit ​​structure for easy installation and a detection hole.

[0011] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the transmission module adopts LoRa wireless communication technology.

[0012] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the acquisition module adopts a PT100 platinum resistance temperature sensor.

[0013] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the energy storage module includes an electromagnetic induction energy acquisition device, a rectification and voltage stabilization circuit, and an energy storage device.

[0014] As a preferred solution of the wireless multi-point temperature measurement system of the high-voltage switch cabinet of the present invention, the electromagnetic induction energy acquisition device includes an open C-shaped magnetic core made of a high magnetic permeability material, and a coil winding tightly fitted with the open C-shaped magnetic core.

[0015] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the rectification and voltage stabilization circuit includes a full-wave rectifier bridge and a low-voltage difference linear regulator, as well as a capacitor filter circuit for suppressing ripples.

[0016] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the energy storage device includes a primary energy storage device, a super capacitor, and a secondary energy storage device, a lithium battery.

[0017] As a preferred solution of the wireless multi-point temperature measurement system for high-voltage switch cabinet of the present invention, the acquisition module includes a constant current source, a differential amplifier, a low-pass filter circuit, and a 24-bit high-resolution ADC.

[0018] In a second aspect, the present invention provides the following technical solutions: a wireless multi-point temperature measurement method for a high-voltage switch cabinet, comprising obtaining temperature data from each temperature measurement point in the high-voltage switch cabinet through an acquisition module;

[0019] Processing temperature data through control module;

[0020] Transmitting the collected temperature data to a remote monitoring center through a transmission module; and,

[0021] The energy storage module obtains electric energy from the high-voltage power grid through electromagnetic induction and stores and manages the energy, wherein the acquisition module, control module, transmission module and energy storage module are arranged inside the shell.

[0022] The beneficial effects of the present invention are as follows: it is possible to realize real-time temperature monitoring of multiple key parts of the high-voltage switch cabinet, and comprehensively cover all important components. By adopting wireless sensors and communication technology, the system avoids the need for complex wired wiring, greatly simplifying the installation process. In addition, the system also includes a control module that can perform trend analysis, abnormal warning and fault prediction on temperature data, thereby facilitating the predictive maintenance of the switch cabinet. By comprehensively monitoring the temperature changes of each key node inside the high-voltage switch cabinet, the safety of the system is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing 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 creative work. Among them:

[0024] Figure 1 The structural framework of the wireless multi-point temperature measurement system for high-voltage switchgear Figure 1 .

[0025] Figure 2 The structural framework of the wireless multi-point temperature measurement system for high-voltage switchgear Figure 2 .

[0026] Figure 3 The structural framework of the wireless multi-point temperature measurement system for high-voltage switchgear Figure 2 .

[0027] Figure 4 It is a schematic diagram of the shell structure.

[0028] Figure 5 This is a flowchart of the wireless multi-point temperature measurement method for high-voltage switchgear. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] Reference Figure 1, which is the first embodiment of the present invention, and provides a wireless multi-point temperature measurement system for a high-voltage switch cabinet, which includes a housing M for protecting a collection module 100, a control module 200, a transmission module 300 and an energy storage module 400 arranged inside, wherein the housing M can be made of a high-voltage resistant and insulating material, including but not limited to polyester resin glass fiber reinforced plastic and epoxy resin glass fiber reinforced plastic;

[0034] The acquisition module 100 is used to accurately acquire temperature data from each temperature measurement point in the high-voltage switch cabinet and transmit it to the control module 200 for processing, wherein the acquisition module 100 may be an infrared non-contact temperature sensor or a PT100 platinum resistance temperature sensor, etc.;

[0035] The control module 200 acquires the temperature data collected by the acquisition module 100 and processes the temperature data, wherein the control module 200 uses a high-performance microprocessor, including but not limited to an Intel Cyclone V series FPGA embedded processor or an ARM Cortex-M4 microprocessor;

[0036] The transmission module 300 transmits the collected temperature data to the remote monitoring center, wherein the transmission module 300 may adopt a wireless communication technology such as ZigBee or LoRa;

[0037] The energy storage module 400 is used to obtain electrical energy from the high-voltage power grid through electromagnetic induction and store and manage energy. The energy storage module 400 can also be integrated with a solar panel to assist charging under sunlight conditions, thereby improving the diversity and reliability of the energy storage module 400.

[0038] In summary, the beneficial effect of the wireless multi-point temperature measurement system for a high-voltage switch cabinet of the present invention is to realize real-time temperature monitoring of multiple key parts of the high-voltage switch cabinet, comprehensively cover all important components of the high-voltage switch cabinet, and further, realize comprehensive monitoring of the temperature changes of each key node inside the high-voltage switch cabinet, thereby improving the safety of the system.

[0039] Example 2

[0040] Reference Figure 2 to Figure 4 , which is the second embodiment of the present invention, and provides a wireless multi-point temperature measurement system for a high-voltage switch cabinet, which includes a housing M for protecting a collection module 100, a control module 200, a transmission module 300 and an energy storage module 400 arranged therein;

[0041] It should be noted that the shell M includes a shell M box, and the acquisition module 100, the control module 200, the transmission module 300 and the energy storage module 400 are arranged in the shell M box. Furthermore, the shell M is arranged on the contacts of the 10kV switch device that is prone to heat or at the connection between the switch device and the busbar.

[0042] The acquisition module 100 is used to accurately obtain temperature data from each temperature measurement point in the high-voltage switch cabinet and transmit it to the control module 200 for processing;

[0043] The control module 200 obtains the temperature data collected by the acquisition module 100 and processes the temperature data. The control module 200 adopts a PIC16LF1823 microprocessor. The PIC16LF1823 microprocessor further provides a variety of communication interfaces for exchanging data with the acquisition module 100 and the transmission module 300 to ensure the coordinated operation of the entire system. Specifically, the SPI interface is used to communicate with an external analog-to-digital converter or other peripherals (such as additional sensors) to support high-speed data transmission.

[0044] I2C interface: used for data transmission with a multiplexer or other low-speed devices in the acquisition module 100, simplifying the connection of multiple sensors.

[0045] UART interface: used for data communication with the LoRa transmission module 300 to ensure reliable transmission of data to the remote monitoring system;

[0046] It should be noted that the control module 200 uses the internal timer and interrupt mechanism of the PIC16LF1823 microprocessor to achieve accurate task scheduling and system management: Scheduled task management: Through the timer module of the MCU, the system can collect temperature data at set time intervals and start data processing and transmission operations according to the collection frequency. At the same time, the control module 200 can set timer interrupts to ensure efficient execution of periodic tasks. Interrupt processing: The PIC16LF1823 microprocessor has multiple interrupt sources and can respond to external signals or internal system events in real time. For example, an interrupt is triggered when the sensor acquisition is completed to quickly process the data and transmit it to the remote monitoring system. When the energy module detects that the battery is low, it can also enter low power mode through an interrupt.

[0047] It should be further explained that the control module 200 processes the temperature data obtained from the acquisition module 100 through the PIC16LF1823 microprocessor and performs necessary corrections and filtering: Temperature correction: Due to the accuracy requirements of the PT100 sensor, the MCU performs linear correction on the acquired temperature data. The built-in mathematical operation module can perform simple floating-point operations on the temperature data to ensure the accuracy of the collected data. Filtering algorithm: In order to suppress electromagnetic noise in a high-voltage environment, the system uses a digital filtering algorithm (such as a sliding average filter) to smooth the temperature data and eliminate abnormal fluctuations. Data storage: The PIC16LF1823 microprocessor has a built-in 128-byte EEPROM, and the control module 200 temporarily stores the temperature data in the EEPROM to prevent data loss due to transmission delays or insufficient energy. In addition, the system can also manage data storage through a circular buffer mechanism to ensure that the latest temperature data is always available.

[0048] It should be further explained that the PIC16LF1823 microprocessor adopts a low-power design, which is particularly suitable for the strict requirements of energy efficiency in wireless temperature measurement systems: Sleep mode: When the system is inactive, the MCU will enter sleep mode, turn off most peripherals, and only keep the necessary low-frequency clocks and timers running. Wake-up conditions include timer interrupts, external signal interrupts, etc. Power management: The control module 200 monitors the power status of the energy module in real time. When the voltage is lower than the threshold, the system automatically reduces the operating frequency and enters a low-power mode to extend the battery life. The power information will also be fed back to the remote monitoring end through the transmission module 300. Further, the control module 200 also integrates a variety of self-test and fault detection functions to ensure the stability of the system in a high-voltage environment: Sensor monitoring: By regularly detecting the connection status and data validity of the sensor, the control module 200 can detect sensor faults (such as open circuit or short circuit) in real time and trigger an alarm. Power monitoring: The control module 200 monitors the voltage and current of the energy module through the ADC. If an overload or insufficient power occurs, the system will immediately enter the protection mode and record the fault information.

[0049] Preferably, the control module 200 ensures the stability and reliability of the high-voltage wireless temperature measurement system through efficient task scheduling, low power consumption design, and reliable data processing and storage functions, while ensuring the scalability and security of the system through rich communication interfaces and fault detection mechanisms.

[0050] The transmission module 300 transmits the collected temperature data to a remote monitoring center;

[0051] The energy storage module 400 is used to obtain electrical energy from the high-voltage power grid through electromagnetic induction and to store and manage the energy.

[0052] Furthermore, the housing M includes a snap-fit ​​structure M1 for easy installation, and a detection hole M2.

[0053] It should be noted that the buckle is used to fasten to the high-voltage line side.

[0054] Furthermore, the transmission module 300 adopts LoRa wireless communication technology, wherein the core of the transmission module 300 is a LoRa radio frequency transmitter, which is mainly responsible for transmitting the collected temperature data from the control module 200 to the remote LoRa gateway, and then transmitting the data to the central monitoring system through the gateway. The LoRa radio frequency transmitter operates in the 868MHz frequency band. The LoRa signal in the 868MHz frequency band has excellent propagation performance in an open environment, which is suitable for the data transmission requirements inside and outside the high-voltage switch cabinet. The amount of temperature measurement data is small, and the low-rate transmission of LoRa is sufficient to meet the real-time requirements of temperature data, while further reducing power consumption. The spread spectrum modulation technology (CSS, Chirp Spread Spectrum) is adopted to achieve efficient transmission in a high noise and interference environment. Through spread spectrum modulation, the transmission signal occupies a wider frequency band. Even under the strong electromagnetic interference generated by the high-voltage switch cabinet, LoRa can still stably transmit data with an extremely low bit error rate, ensuring the accuracy of the data. Further, when data transmission is not required, the LoRa radio frequency transmitter enters a deep sleep mode and consumes only very low power. According to the preset temperature measurement cycle, the system wakes up the LoRa module for data transmission after each temperature data collection is completed, and then enters the sleep state again.

[0055] It should be noted that LoRa communication technology can cover a wide area, usually up to hundreds of meters indoors and several kilometers outdoors, and is particularly suitable for multi-point temperature measurement and data transmission needs of large equipment such as high-voltage switchgear. Spread spectrum modulation technology is used to enable stable data transmission in a noisy electromagnetic environment. The electromagnetic interference around the high-voltage switchgear is strong, and LoRa's anti-interference ability enables it to maintain a stable communication link. LoRa communication has very low energy consumption, which is very suitable for systems that need to run for a long time and cannot frequently replace batteries. This system can reduce communication energy consumption and extend the service life of the equipment through LoRa technology.

[0056] It should be further explained that the transmission module 300 has a timer and task scheduling mechanism, collects data from multiple temperature measurement points in sequence, and sets a temperature measurement device to collect data from each slave for the host, ensuring that the data of each measurement point will not conflict or be lost. After the host control module 200 summarizes the temperature data, the transmission module 300 sends it to the remote gateway. In order to ensure the effective transmission of multi-point data, the transmission module 300 packages the data of multiple measurement points into a data packet for transmission, and adds a check code and a timestamp to each data packet so that the monitoring center can verify and reorganize the data. This method not only reduces the communication load, but also improves the reliability and accuracy of data transmission.

[0057] It should be further explained that the transmission module 300 has basic fault detection and self-test functions, which can monitor the operating status of the module in real time and detect whether there is a signal interruption or RF module failure. If a fault is found, the transmission module 300 will self-repair or provide error feedback through internal mechanisms and notify the monitoring center. The device status information is also transmitted to the remote monitoring system via LoRa signals to remind the operation and maintenance personnel to perform on-site maintenance.

[0058] Preferably, in order to address electromagnetic interference in high-voltage environments, low power consumption requirements, and efficient transmission of multi-point temperature measurement data, the transmission module 300 adopts LoRa (Long Range) wireless communication technology, and combines multi-point management, data security and low power consumption design to achieve efficient and reliable data transmission.

[0059] Furthermore, the acquisition module 100 adopts a PT100 platinum resistance temperature sensor, wherein the PT100 platinum resistance temperature sensor is arranged in the detection hole M2 for detecting the ambient temperature.

[0060] Preferably, the PT100 platinum resistance temperature sensor used in this system has the characteristics of high precision, strong stability, and strong anti-interference ability, and is suitable for temperature monitoring of high-voltage switchgear equipment.

[0061] Furthermore, the acquisition module 100 includes a constant current source, a differential amplifier, a low-pass filter circuit, and a 24-bit high-resolution ADC.

[0062] It should be noted that in order to make the resistance change of the PT100 platinum resistance temperature sensor proportional to the temperature change, the acquisition module 100 provides a stable current to the sensor through a constant current source. The constant current source design can eliminate the influence of the line resistance on the measurement result, ensuring that the voltage change output by the PT100 sensor is only caused by its resistance change. The acquisition module 100 integrates a high-precision differential amplifier to amplify the weak signal of the sensor. The amplifier circuit uses a low-noise operational amplifier (INA333), which can effectively reduce the influence of environmental noise and high-voltage electromagnetic interference and ensure a high signal-to-noise ratio of the signal. In order to further suppress electromagnetic interference from the high-voltage environment, the acquisition module 100 is designed with a low-pass filter circuit to remove high-frequency noise and ensure the purity of the output signal. The cutoff frequency of the filter is accurately calculated to ensure that the impact on the useful signal is minimized. The acquisition module 100 uses a 24-bit high-resolution ADC to capture subtle temperature changes and ensure that the measurement accuracy reaches industrial standards.

[0063] Furthermore, the energy storage module 400 includes an electromagnetic induction energy harvesting device 401 , a rectifying and voltage stabilizing circuit 402 , and an energy storage device 403 .

[0064] Furthermore, the electromagnetic induction energy harvesting device 401 includes an open C-shaped magnetic core made of a high magnetic permeability material, and a coil winding that fits tightly with the open C-shaped magnetic core.

[0065] It should be noted that the magnetic core is made of high magnetic permeability materials (such as ferrite or high-performance alloy materials), which can enhance the electromagnetic induction effect. The geometric shape of the magnetic core is designed to be an open C shape, so as to facilitate close coupling with the high-voltage conductor and improve the energy extraction efficiency. The magnetic core is attached to the inner side of the snap-on structure M1 of the shell M and is in an open C shape. The coil winding and the magnetic core are coupled in a close fit to improve the electromagnetic induction efficiency. During the operation of this system, the magnetic field generated by the current in the high-voltage conductor is coupled to the coil through the magnetic core to generate an induced current.

[0066] Preferably, the C-shaped magnetic core has a larger opening and can be flexibly clamped on conductors of different diameters while ensuring the stability of electromagnetic coupling.

[0067] Furthermore, the rectification and voltage stabilization circuit 402 includes a full-wave rectifier bridge and a low voltage dropout linear regulator, as well as a capacitor filter circuit for suppressing ripples.

[0068] It should be noted that an efficient full-wave rectifier bridge is used to convert the alternating current induced from the coil into direct current to improve energy utilization. The diode of the rectifier circuit selects a low-voltage drop Schottky diode to reduce conversion loss, thereby improving energy transmission efficiency. The rectified direct current may have large fluctuations. In order to provide a smooth direct current output, a capacitor filter circuit is designed in the system. The filter capacitor uses a high-voltage resistant electrolytic capacitor or ceramic capacitor to suppress the ripple after rectification, ensure the stability of the output voltage, and avoid impacting the subsequent energy storage device 403. The voltage stabilization circuit is used to ensure that the output voltage is stable within a preset range, and regardless of the fluctuation of the input voltage, it can provide a stable power supply for the control module 200 and the transmission module 300. The voltage regulator can use a low voltage difference (LDO) linear regulator. In order to cope with high voltage requirements, an overvoltage protection circuit and a current limiting circuit are integrated to prevent damage to the circuit due to excessive voltage.

[0069] Furthermore, the energy storage device 403 includes a primary energy storage device 403 super capacitor and a secondary energy storage device 403 lithium battery.

[0070] It should be noted that supercapacitors have the advantage of fast charging and discharging. They can quickly store electrical energy when electromagnetic induction is instantaneous, and discharge it immediately when needed, providing high-power output in a short time. At the same time, this type of device is suitable for frequent charge and discharge cycles and has a long life. The supercapacitor is connected to the control module 200 through a power management circuit. When the system needs power, the primary energy storage device 403 can respond quickly and provide instant energy; the secondary energy storage device 403 lithium battery is mainly used to provide continuous power supply when the high-voltage electromagnetic environment is weak or there is no electromagnetic field for a moment. The lithium battery can be slowly charged through the primary energy storage device 403. When the supercapacitor is low on power after a short period of power supply, the lithium battery takes over the power supply to ensure that the system can continue to operate in an intermittent electromagnetic field environment.

[0071] Preferably, the energy storage device 403 adopts a two-stage design to balance short-term and long-term energy demands.

[0072] In summary, the beneficial effect of the wireless multi-point temperature measurement system for high-voltage switch cabinets of the present invention is that it can realize real-time temperature monitoring of multiple key parts of the high-voltage switch cabinet, and comprehensively cover all important components. By adopting wireless sensors and communication technology, the system avoids the need for complex wired wiring and greatly simplifies the installation process. In addition, the system also includes a control module 200, which can perform trend analysis, abnormal warning and fault prediction on temperature data, thereby facilitating predictive maintenance of the switch cabinet. By comprehensively monitoring the temperature changes of each key node inside the high-voltage switch cabinet, the safety of the system is significantly improved.

[0073] Example 3

[0074] Reference Figure 5, which is the third embodiment of the present invention, and provides a wireless multi-point temperature measurement method for a high-voltage switch cabinet, comprising:

[0075] S1. Obtain temperature data from each temperature measuring point in the high-voltage switch cabinet through the acquisition module 100;

[0076] S2, processing the temperature data through the control module 200;

[0077] S3, transmitting the collected temperature data to the remote monitoring center through the transmission module 300; and,

[0078] S4. Obtain electrical energy from the high-voltage power grid through electromagnetic induction through the energy storage module 400 and store and manage the energy, wherein the acquisition module 100, the transmission module 300, the control module 200 and the energy storage module 400 are arranged inside the shell M.

[0079] In summary, the beneficial effect of the wireless multi-point temperature measurement system for a high-voltage switch cabinet of the present invention is that all key modules (acquisition module 100, transmission module 300, control module 200 and energy storage module 400) are integrated inside the shell M. Such a design not only protects the internal components from the influence of the external environment, but also helps to reduce space occupancy. Furthermore, the energy storage module 400 can use electromagnetic induction to obtain electrical energy from the high-voltage power grid, thereby achieving energy self-sufficiency, without the need for an external power supply, and reducing dependence on energy.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wireless multi-point temperature measurement system for high-voltage switch cabinet, characterized in that: include, A housing (M) for protecting a collection module (100), a control module (200), a transmission module (300) and an energy storage module (400) arranged inside; The acquisition module (100) is used to accurately acquire temperature data from each temperature measurement point in the high-voltage switch cabinet, and transmit the temperature data to the control module (200) for processing; The control module (200) acquires the temperature data collected by the collection module (100) and processes the temperature data; The transmission module (300) transmits the collected temperature data to a remote monitoring center; The energy storage module (400) is used to obtain electrical energy from a high-voltage power grid through electromagnetic induction and to store and manage energy.

2. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 1, characterized in that: The housing (M) comprises a buckle structure (M1) for easy installation, and a detection hole (M2).

3. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 2, characterized in that: The transmission module (300) adopts LoRa wireless communication technology.

4. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 3 is characterized in that: The acquisition module (100) adopts a PT100 platinum resistance temperature sensor.

5. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 4, characterized in that: The energy storage module (400) comprises an electromagnetic induction energy extraction device (401), a rectification and voltage stabilization circuit (402), and an energy storage device (403).

6. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 5, characterized in that: The electromagnetic induction energy harvesting device (401) comprises an open C-shaped magnetic core made of a high magnetic permeability material, and a coil winding tightly fitted to the open C-shaped magnetic core.

7. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 6, characterized in that: The rectification and voltage stabilization circuit (402) comprises a full-wave rectifier bridge and a low voltage drop linear regulator, as well as a capacitor filter circuit for suppressing ripples.

8. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 7, characterized in that: The energy storage device (403) comprises a primary energy storage device (403) super capacitor and a secondary energy storage device (403) lithium battery.

9. The wireless multi-point temperature measurement system for high-voltage switch cabinet according to claim 8, characterized in that: The acquisition module (100) comprises a constant current source, a differential amplifier, a low-pass filter circuit, and a 24-bit high-resolution ADC.

10. A wireless multi-point temperature measurement method for a high-voltage switch cabinet, characterized in that: Obtaining temperature data from various temperature measurement points in the high-voltage switch cabinet through a collection module (100); Processing the temperature data through a control module (200); transmitting the collected temperature data to a remote monitoring center through a transmission module (300); and, The energy storage module (400) is used to obtain electric energy from a high-voltage power grid through electromagnetic induction and to store and manage the energy, wherein the acquisition module (100), the control module (200), the transmission module (300) and the energy storage module (400) are arranged inside a housing (M).

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