New energy box transformer substation wireless node temperature measurement system

Abstract

The utility model discloses a new energy box transformer substation wireless node temperature measurement system, which belongs to the technical field of new energy box transformer substation temperature measurement and comprises a plurality of wireless temperature measurement nodes, a data concentrator connected with the wireless temperature measurement nodes and a monitoring terminal connected with the data concentrator. And each wireless temperature measurement node is arranged at the joint of a low-voltage incoming cabinet copper bar and a transformer copper bar in the new energy box transformer substation. According to the utility model, the real-time monitoring of the internal temperature of the new energy box-type transformer substation is realized through wireless communication, and the problem that the traditional box-type transformer substation is unstable and unsafe in temperature measurement is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature measurement of new energy box transformers, and in particular relates to a wireless node temperature measurement system for new energy box transformers. Background Art

[0002] New energy technologies are being widely used. As an important part of the new energy power generation system, the operation stability and safety of new energy box transformers are of vital importance. However, traditional temperature measurement methods usually have problems such as complex wiring and difficult maintenance, which makes it difficult to meet the stability and safety requirements of new energy box transformer temperature measurement. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a new energy box transformer wireless node temperature measurement system, which realizes real-time monitoring of the internal temperature of the new energy box transformer through wireless communication, and solves the problem of unstable and unsafe temperature measurement of traditional box transformer.

[0004] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the utility model is:

[0005] The utility model provides a new energy box transformer wireless node temperature measurement system, comprising a plurality of wireless temperature measurement nodes, a data concentrator connected to each wireless temperature measurement node, and a monitoring terminal connected to the data concentrator.

[0006] The beneficial effects of the utility model are as follows: the utility model can perform multi-point targeted temperature monitoring on the new energy box transformer through a number of wireless temperature measurement nodes, and the obtained temperature measurement data can be transmitted to the data concentrator through multi-channel wireless, and transmitted to the monitoring terminal through the data concentrator for display, providing a basis for data analysis, processing and early warning based on temperature measurement data; the utility model adopts wireless temperature measurement nodes in the new energy box transformer, which does not require wiring and is easy to install. It is more convenient to maintain without considering line aging and damage, and temperature monitoring is more stable and safer. Moreover, through the communication connection between the data concentrator and the monitoring terminal, real-time observation and monitoring of the internal temperature changes of the new energy box transformer can be realized.

[0007] Preferably, each of the wireless temperature measurement nodes is installed at the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer.

[0008] The beneficial effect of adopting the above-mentioned preferred scheme is: by installing each of the wireless temperature measurement nodes at the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer, effective and stable monitoring of the temperature of the new energy box transformer can be achieved, and the temperature conditions of important positions inside the new energy box transformer can be more accurately reflected.

[0009] Preferably, each of the wireless temperature measurement nodes comprises a temperature sensor, a wireless communication module and a power supply module;

[0010] The power module is connected to the temperature sensor and the wireless communication module respectively to provide the power supply VCC; the temperature sensor is installed at the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer; the temperature sensor is connected to the wireless communication module; the wireless communication module is connected to the data concentrator.

[0011] The beneficial effects of adopting the above-mentioned preferred scheme are as follows: the utility model provides a stable power supply VCC for the temperature sensor and the wireless communication module through the power module, which can ensure the stable operation of the wireless temperature measurement node and the stability of the temperature measurement. At the same time, the temperature sensor is used to perform real-time temperature monitoring of the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer, and the temperature measurement signal at the most representative position is obtained. The monitoring results are transmitted to the data concentrator through the wireless communication module for the collection of temperature measurement data, which provides a basis for visual monitoring of the temperature conditions and temperature warnings inside the new energy box transformer.

[0012] Preferably, the temperature sensor includes a thermal resistor P1, a shunt shunt regulator U16 of model TL431, a potentiometer VR1, a potentiometer VR2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a grounding resistor R5, a resistor R6, a resistor R7, a resistor R8, an amplifier U1A of model LM324, a voltage regulator D1 of model 1N4733, a grounding capacitor C1 and a capacitor C2;

[0013] The first end of the thermal resistor P1 is respectively connected to one end of the resistor R1 and one end of the resistor R3; the second end of the thermal resistor P1 is connected to one end of the potentiometer VR2; the third end of the thermal resistor P1 is grounded; the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the potentiometer VR1, the negative electrode of the shunt parallel regulator U16 and one end of the resistor R8; the other end of the resistor R8 is connected to the power module; the positive electrode of the shunt parallel regulator U16 is connected to the other end of the potentiometer VR1 and is grounded; the reference end of the shunt parallel regulator U16 is connected to the sliding end of the potentiometer VR1; the other end of the resistor 2 is connected to the other end of the potentiometer VR2, one end of the resistor R4 and the The sliding end is connected; the other end of the resistor R3 is respectively connected to the grounding resistor R5 and the 3rd pin of the amplifier U1A; the other end of the resistor R4 is respectively connected to the 2nd pin of the amplifier U1A and one end of the resistor R6; the 4th pin of the amplifier U1A is connected to the grounding capacitor C1 and the power module; the 11th pin of the amplifier U1A is grounded; the 1st pin of the amplifier U1A is respectively connected to the other end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is respectively connected to the negative electrode of the voltage regulator D1 and one end of the capacitor R2, and serves as the temperature measurement signal output end; the positive electrode of the voltage regulator D1 is connected to the other end of the capacitor C2 and is grounded; the temperature measurement signal output end is connected to the wireless communication module.

[0014] The beneficial effects of adopting the above-mentioned preferred scheme are as follows: the temperature sensor provided by the utility model measures the temperature at the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer by constructing a measuring bridge, and amplifies the pressure difference that occurs when the resistance values ​​of the thermal resistor P1 and the potentiometer VR2 are not equal, so as to obtain a temperature measurement signal of the desired size, thereby providing a basis for the wireless communication module to perform analog-to-digital conversion and temperature measurement data transmission.

[0015] Preferably, the wireless communication module includes a single chip microcomputer of model STEM32F103C8T6 and a LoRa communication module of model A32-S433A30S2a;

[0016] The PA1 pin of the single-chip microcomputer is connected to the temperature measurement signal output end; the PA4 pin, PA5 pin, PA6 pin and PA7 pin of the single-chip microcomputer are connected to the SCK pin, MISO pin, MOSI pin and NSS pin of the LoRa communication module in sequence; the PA2 pin of the single-chip microcomputer is connected to the RESET pin of the LoRa communication module; the PA3 pin of the single-chip microcomputer is connected to the DIO0 pin of the LoRa communication module; the VCC pin of the LoRa communication module is connected to the power module; the GND pin of the LoRa module is grounded; and the LoRa communication module is connected to the data concentrator.

[0017] The beneficial effects of adopting the above-mentioned preferred scheme are as follows: the utility model adopts a single-chip microcomputer with model number STEM32F103C8T6, which can perform analog-to-digital conversion processing on the temperature measurement signal received from the temperature sensor to obtain temperature measurement data, and based on the connection between the single-chip microcomputer and the LoRa communication module, it can realize long-distance wireless transmission of temperature measurement data, which is suitable for the transmission of temperature measurement data of new energy box transformers in ultra-altitude and cold areas. No human intervention is required, and wireless communication can be automatically realized to transmit temperature measurement data to the data concentrator; the LoRa communication module with model number A32-S433A30S2a adopted by the utility model is a patch-type LoRa module, which is easy to install and occupies a small volume. The effective transmission distance reaches 8.5km, which can effectively adapt to high-altitude and low-temperature environments.

[0018] Preferably, the data concentrator adopts an Internet of Things base station concentrator of model AC701; the Internet of Things base station concentrator and the LoRa communication module communicate through the LoRa WAN protocol; the Internet of Things base station concentrator and the monitoring terminal use 4G network communication or RS485 communication.

[0019] The beneficial effects of adopting the above-mentioned preferred scheme are as follows: the Internet of Things base station concentrator adopted by the utility model can realize multi-channel reception of temperature measurement data, and transmit the temperature measurement data to the monitoring terminal in an internal or wireless manner, providing a basis for the monitoring terminal to perform visualization processing, data analysis and early warning of temperature measurement data.

[0020] Preferably, the monitoring terminal includes a handheld intelligent terminal and a computer;

[0021] If the monitoring terminal is a handheld smart terminal, the handheld smart terminal and the IoT base station concentrator use 4G networking communication;

[0022] If the monitoring terminal is a computer, the computer and the IoT base station concentrator use RS485 communication.

[0023] The beneficial effects of adopting the above-mentioned preferred scheme are as follows: the monitoring terminal provided by the utility model includes a handheld smart terminal, which can be a smart terminal such as a mobile phone or a tablet. Under the requirement of long-distance data monitoring, it can realize 4G communication, and obtain the temperature measurement data in the new energy box transformer in real time and without distance restriction. If the distance between the monitoring terminal and the data concentrator is limited, the temperature measurement data in the new energy box transformer can be obtained through RS485 wired communication, which provides a basis for the monitoring terminal to store, analyze and warn the temperature measurement data.

[0024] Other advantages of the present invention will be analyzed in more detail in subsequent embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a structural block diagram of a new energy box-type transformer wireless node temperature measurement system in an embodiment of the utility model.

[0027] Figure 2 1 is a circuit diagram of a temperature sensor in an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0029] like Figure 1 As shown, in one embodiment of the utility model, the utility model provides a new energy box transformer wireless node temperature measurement system, including a plurality of wireless temperature measurement nodes, a data concentrator connected to each wireless temperature measurement node, and a monitoring terminal connected to the data concentrator.

[0030] Each of the wireless temperature measurement nodes is installed at the connection between the copper bar of the low-voltage incoming line cabinet and the copper bar of the transformer inside the new energy box transformer. In this embodiment, the new energy box transformer is a new energy photovoltaic box transformer.

[0031] Each of the wireless temperature measurement nodes includes a temperature sensor, a wireless communication module and a power supply module;

[0032] The power module is connected to the temperature sensor and the wireless communication module respectively to provide the power supply VCC; the temperature sensor is installed at the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer; the temperature sensor is connected to the wireless communication module; the wireless communication module is connected to the data concentrator.

[0033] like Figure 2As shown, the temperature sensor includes a thermal resistor P1, a shunt parallel regulator U16 of model TL431, a potentiometer VR1, a potentiometer VR2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a grounding resistor R5, a resistor R6, a resistor R7, a resistor R8, an amplifier U1A of model LM324, a voltage regulator D1 of model 1N4733, a grounding capacitor C1 and a capacitor C2;

[0034] The first end of the thermal resistor P1 is respectively connected to one end of the resistor R1 and one end of the resistor R3; the second end of the thermal resistor P1 is connected to one end of the potentiometer VR2; the third end of the thermal resistor P1 is grounded; the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the potentiometer VR1, the negative electrode of the shunt parallel regulator U16 and one end of the resistor R8; the other end of the resistor R8 is connected to the power module; the positive electrode of the shunt parallel regulator U16 is connected to the other end of the potentiometer VR1 and is grounded; the reference end of the shunt parallel regulator U16 is connected to the sliding end of the potentiometer VR1; the other end of the resistor 2 is connected to the other end of the potentiometer VR2, one end of the resistor R4 and the The sliding end is connected; the other end of the resistor R3 is respectively connected to the grounding resistor R5 and the 3rd pin of the amplifier U1A; the other end of the resistor R4 is respectively connected to the 2nd pin of the amplifier U1A and one end of the resistor R6; the 4th pin of the amplifier U1A is connected to the grounding capacitor C1 and the power module; the 11th pin of the amplifier U1A is grounded; the 1st pin of the amplifier U1A is respectively connected to the other end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is respectively connected to the negative electrode of the voltage regulator D1 and one end of the capacitor R2, and serves as the temperature measurement signal output end; the positive electrode of the voltage regulator D1 is connected to the other end of the capacitor C2 and is grounded; the temperature measurement signal output end is connected to the wireless communication module.

[0035] The temperature sensor provided by the utility model adopts a shunt parallel regulator U16 and a potentiometer VR1 of model TL431 to adjust and generate a reference power supply, and adopts resistor R1, resistor R2, potentiometer VR2 and thermal resistor P1 to form a measuring bridge to measure the temperature of the connection between the copper bar of the low-voltage incoming cabinet and the copper bar of the transformer inside the new energy box transformer. When the resistance value of the thermal resistor P1 is not equal to the resistance value of the potentiometer VR2, the bridge outputs a millivolt-level pressure difference signal, and the pressure difference signal is amplified by the amplifier to output a voltage signal of the desired size, and the voltage signal is output to the wireless communication module through the temperature measurement signal output end. The thermal resistor P1 can be a thermal resistor of model Pt100. In this temperature sensor, the resistance values ​​of resistor R3 and resistor R4 are equal, the resistance values ​​of grounding resistor R5 and resistor R6 are equal, and the amplification factor is the quotient of the resistance values ​​of grounding resistor R5 and resistor R3. The amplification factor is adjustable and can adapt to various temperature measurement environments and temperature measurement requirements.

[0036] The wireless communication module includes a single chip microcomputer with a model number of STEM32F103C8T6 and a LoRa communication module with a model number of A32-S433A30S2a;

[0037] The PA1 pin of the single-chip microcomputer is connected to the temperature measurement signal output end; the PA4 pin, PA5 pin, PA6 pin and PA7 pin of the single-chip microcomputer are connected to the SCK pin, MISO pin, MOSI pin and NSS pin of the LoRa communication module in sequence; the PA2 pin of the single-chip microcomputer is connected to the RESET pin of the LoRa communication module; the PA3 pin of the single-chip microcomputer is connected to the DIO0 pin of the LoRa communication module; the VCC pin of the LoRa communication module is connected to the power module; the GND pin of the LoRa module is grounded; and the LoRa communication module is connected to the data concentrator. The PA1 pin of the single-chip microcomputer is connected to the temperature measurement signal output end to receive the voltage signal obtained by measuring the temperature by the temperature sensor, and the temperature measurement data is obtained after analog-to-digital conversion by the single-chip microcomputer; the MISO pin and MOSI pin of the LoRa communication module are connected to the PA5 pin and PA6 pin of the single-chip microcomputer to transmit the temperature measurement data to the data concentrator through the LoRa communication module; the SCK pin of the LoRa communication module is connected to the PA4 pin of the single-chip microcomputer to achieve clock synchronization between the single-chip microcomputer and the LoRa communication module; the NSS pin of the LoRa communication module is connected to the PA7 pin of the single-chip microcomputer to achieve chip selection; the RESET pin of the LoRa communication module is connected to the PA2 pin of the single-chip microcomputer to reset the LoRa communication module; the DIO0 pin of the LoRa communication module is connected to the PA3 pin of the single-chip microcomputer to receive an interrupt.

[0038] The data concentrator adopts an IoT base station concentrator of model AC701; the IoT base station concentrator communicates with the LoRa communication module through the LoRa WAN protocol; the IoT base station concentrator and the monitoring terminal use 4G networking communication or RS485 communication. The IoT base station concentrator uses LoRa wireless modulation technology to achieve long-distance reception of temperature measurement data. It has multiple LoRa channels, which can realize multi-channel transmission and reception. It can realize node combination with the LoRa communication module, and realize fully transparent wireless data transmission and reception without changing any protocol and data; the IoT base station concentrator can realize fast, accurate, and unrestricted temperature measurement data transmission through 4G networking communication, which can meet the needs of transmitting temperature measurement data to the monitoring device after monitoring in extremely cold areas at high altitudes.

[0039] The monitoring terminal includes a handheld intelligent terminal and a computer;

[0040] If the monitoring terminal is a handheld smart terminal, the handheld smart terminal and the IoT base station concentrator use 4G networking communication;

[0041] If the monitoring terminal is a computer, the computer and the IoT base station concentrator use RS485 communication. Based on the handheld smart terminal and computer, the temperature measurement data can be visualized and utilized.

[0042] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new energy box-type transformer wireless node temperature measurement system, characterized in that: It includes several wireless temperature measurement nodes, a data concentrator connected to each wireless temperature measurement node, and a monitoring terminal connected to the data concentrator; Each of the wireless temperature measurement nodes includes a temperature sensor, a wireless communication module and a power supply module; The power module is connected to the temperature sensor and the wireless communication module respectively to provide power VCC; the temperature sensor is installed at the connection between the low-voltage incoming line cabinet copper bar and the transformer copper bar inside the new energy box transformer; the temperature sensor is connected to the wireless communication module; the wireless communication module is connected to the data concentrator; The temperature sensor includes a thermal resistor P1, a shunt shunt regulator U16 of model TL431, a potentiometer VR1, a potentiometer VR2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a grounding resistor R5, a resistor R6, a resistor R7, a resistor R8, an amplifier U1A of model LM324, a voltage regulator D1 of model 1N4733, a grounding capacitor C1 and a capacitor C2; The first end of the thermal resistor P1 is respectively connected to one end of the resistor R1 and one end of the resistor R3; the second end of the thermal resistor P1 is connected to one end of the potentiometer VR2; the third end of the thermal resistor P1 is grounded; the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the potentiometer VR1, the negative electrode of the shunt parallel regulator U16 and one end of the resistor R8; the other end of the resistor R8 is connected to the power module; the positive electrode of the shunt parallel regulator U16 is connected to the other end of the potentiometer VR1 and is grounded; the reference end of the shunt parallel regulator U16 is connected to the sliding end of the potentiometer VR1; the other end of the resistor 2 is connected to the other end of the potentiometer VR2, one end of the resistor R4 and the The sliding end is connected; the other end of the resistor R3 is respectively connected to the grounding resistor R5 and the 3rd pin of the amplifier U1A; the other end of the resistor R4 is respectively connected to the 2nd pin of the amplifier U1A and one end of the resistor R6; the 4th pin of the amplifier U1A is connected to the grounding capacitor C1 and the power module; the 11th pin of the amplifier U1A is grounded; the 1st pin of the amplifier U1A is respectively connected to the other end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is respectively connected to the negative electrode of the voltage regulator D1 and one end of the capacitor R2, and serves as the temperature measurement signal output end; the positive electrode of the voltage regulator D1 is connected to the other end of the capacitor C2 and is grounded; the temperature measurement signal output end is connected to the wireless communication module.

2. The new energy box-type transformer wireless node temperature measurement system according to claim 1 is characterized in that: Each of the wireless temperature measurement nodes is installed at the connection between the copper busbar of the low-voltage incoming cabinet and the copper busbar of the transformer inside the new energy box transformer.

3. The new energy box-type transformer wireless node temperature measurement system according to claim 1 is characterized in that: The wireless communication module includes a single chip microcomputer with a model number of STEM32F103C8T6 and a LoRa communication module with a model number of A32-S433A30S2a; The PA1 pin of the single-chip microcomputer is connected to the temperature measurement signal output end; the PA4 pin, PA5 pin, PA6 pin and PA7 pin of the single-chip microcomputer are connected to the SCK pin, MISO pin, MOSI pin and NSS pin of the LoRa communication module in sequence; the PA2 pin of the single-chip microcomputer is connected to the RESET pin of the LoRa communication module; the PA3 pin of the single-chip microcomputer is connected to the DIO0 pin of the LoRa communication module; the VCC pin of the LoRa communication module is connected to the power supply module; the GND pin of the LoRa communication module is grounded; and the LoRa communication module is connected to the data concentrator.

4. The new energy box-type transformer wireless node temperature measurement system according to claim 1 is characterized in that: The data concentrator adopts an Internet of Things base station concentrator of model AC701; the Internet of Things base station concentrator communicates with the LoRa communication module through the LoRa WAN protocol; the Internet of Things base station concentrator and the monitoring terminal adopt 4G networking communication or RS485 communication.

5. The new energy box-type transformer wireless node temperature measurement system according to claim 1 is characterized in that: The monitoring terminal includes a handheld intelligent terminal and a computer; If the monitoring terminal is a handheld smart terminal, the handheld smart terminal and the IoT base station concentrator use 4G networking communication; If the monitoring terminal is a computer, the computer and the IoT base station concentrator use RS485 communication.

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