CN203929269U - Wireless temperature measurement system in transformer station - Google Patents

Abstract

The utility model discloses wireless temperature measurement system in a kind of transformer station, it is applied to the monitoring to significant points temperature in transformer station; Comprise wireless temperature measurement supervisor and be arranged on several wireless temperature-measuring terminals on each heat-producing device of transformer station, wireless temperature-measuring terminal carries out communication by wireless network and wireless temperature measurement supervisor, and wireless temperature measurement supervisor carries out data transmission by cable and background system; Wireless temperature-measuring terminal comprises power supply unit, computing the resistor value unit, data processing unit, address control unit and data transmission unit, and wireless temperature measurement supervisor comprises power supply and data receiver unit, signal processing unit, data output unit.The utility model can be realized the real-time remote monitoring to temperature, avoids the generation of burst accident, with cost-saving and personnel's workload.

Description

Wireless temperature measurement system in substation

technical field

The utility model relates to a control system, in particular to a wireless temperature measuring system.

Background technique

With the improvement of substation automation and the promotion of automation technology, it has become possible to truly realize unattended substations. At present, unattended substations generally include substation integrated automation system, microcomputer anti-misoperation locking system, remote monitoring fire protection and anti-theft system, etc. However, the real-time monitoring of the temperature of some important parts of the primary equipment, such as the contacts of the isolating switch and busbar joints, has not been fully realized, and manual inspection and measurement are still required. Since the connection points of the knife switch and the busbar are distributed in different places, and because the equipment and places to be tested are high-voltage, high-altitude, and difficult to access, manual measurement is also very dangerous, and it is easy to cause injury to the measurement personnel. ; And manual inspections can easily cause omissions, and important parts are all high-voltage components, which brings difficulties to temperature monitoring. In some substations, an optical fiber temperature measurement and monitoring system is used. Although the system realizes the monitoring of the temperature in the substation, it requires on-site wiring, a long construction period, and requires a long time for power outages in the substation, and the optical fiber itself is relatively easy to break, break, and not High temperature resistance and low insulation, so it is still impossible to realize real-time monitoring of important high temperature locations.

Utility model content

The technical problem to be solved by the utility model is to provide a wireless temperature measurement system in a substation, which can realize real-time remote monitoring of temperature, avoid sudden accidents, and save costs and personnel workload.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

The wireless temperature measurement system in the substation includes a wireless temperature measurement management machine and several wireless temperature measurement terminals installed on each heating device in the substation. The wireless temperature measurement terminal communicates with the wireless temperature measurement management machine through a wireless network, and the wireless temperature measurement The management machine carries out data transmission through the cable and the background system; the wireless temperature measurement terminal includes a power supply unit, a resistance value calculation unit, a data processing unit, an address control unit and a data transmission unit, and the input terminals of the data processing unit are respectively connected to the resistance value The output end of the calculation unit is connected with the input end of the address control unit, the output end of the data processing unit is connected with the data transmitting unit, and the power supply unit is respectively connected with the resistance value calculation unit, the data processing unit, and the address control unit; The temperature management machine includes a power supply and data receiving unit, a signal processing unit, and a data output unit. The power supply and data receiving unit is connected to the data transmitting unit of the wireless temperature measurement terminal through a wireless network, and the output terminals of the power supply and data receiving unit are also connected to the The signal processing unit is connected to the data output unit, the output end of the signal processing unit is connected to the input end of the data output unit, and the output end of the data output unit is connected to the background system through a cable.

The improvement of the utility model is that: the power supply unit of the wireless temperature measurement terminal and the power supply and data receiving unit of the wireless temperature measurement management machine are powered by solar power or current transformer.

Owing to having adopted above-mentioned technical scheme, the technical progress that the utility model obtains is:

The utility model realizes the remote monitoring of the temperature, avoids the occurrence of sudden accidents, and saves cost and personnel workload. The wireless temperature measurement terminal is used to integrate temperature collection, signal conversion and transmission, which is easy to operate and cost-saving; the data processing unit set in the wireless temperature measurement terminal is used to control the sleep and wake-up of the transmitting unit, which greatly reduces energy consumption. The wireless temperature measurement management machine is used to receive the temperature signals sent back by multiple wireless temperature measurement terminals, and compare them with the safety fixed value for unified management, which enhances the security of the system. The background system can be logged in on any computer interface, and the operation is flexible and easy to use.

Description of drawings

Fig. 1 is a system structure diagram of the present utility model;

Fig. 2 is a structural block diagram of the wireless temperature measuring terminal of the present invention;

Fig. 3 is a structural block diagram of the wireless temperature measurement management machine of the present invention;

Fig. 4 is a circuit diagram of the power supply unit of the wireless temperature measuring terminal of the present invention;

Fig. 5 is a circuit diagram of the resistance calculation unit of the wireless temperature measuring terminal of the present invention;

Fig. 6 is a circuit diagram of the data processing unit of the wireless temperature measuring terminal of the present invention;

Fig. 7 is a circuit diagram of the address control unit of the wireless temperature measuring terminal of the present invention;

Fig. 8 is a circuit diagram of the data transmitting unit of the wireless temperature measuring terminal of the present invention;

Fig. 9 is a circuit diagram of the power supply and data receiving unit of the wireless temperature measurement management machine of the present invention;

Fig. 10 is a circuit diagram of the signal processing unit of the wireless temperature measurement management machine of the present invention;

Fig. 11 is a circuit diagram of the data output unit of the wireless temperature measurement management machine of the present invention;

Among them, 1. Background system, 2. Wireless temperature measurement management machine, 3. Wireless temperature measurement terminal.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

The wireless temperature measurement system in the substation, as shown in Figure 1, includes a background system 1, a wireless temperature measurement management machine 2, and several wireless temperature measurement terminals 3 installed on each heating device in the substation. The wireless temperature measurement terminal 3 will collect the obtained The temperature signal is recorded and uploaded to the wireless temperature measurement management machine 2 through the wireless network, and the wireless temperature measurement management machine 2 performs data processing and communication management on the uploaded temperature signal and transmits it to the background system 1 through a cable.

The wireless temperature measurement terminal 3 is installed in an important part of the substation where temperature needs to be measured, completes the temperature collection, performs AD conversion on the collected temperature data, and transmits it wirelessly through the wireless temperature measurement terminal 3 . The wireless temperature measurement terminal 3 includes a power supply unit, a resistance calculation unit, a data processing unit, an address control unit and a data transmission unit, and the connection diagram between each unit is shown in FIG. 2 . The power supply unit is respectively connected with the resistance calculation unit, the data processing unit, and the address control unit to provide power for them; the input end of the data processing unit is respectively connected with the output end of the resistance value calculation unit and the input end of the address control unit; the data processing unit The output end is connected with the data transmitting unit.

The circuit of the power supply unit is shown in Figure 4, which can be powered by solar panels or CT to provide 3.6V power for the resistance calculation unit, data processing unit, address control unit and data transmission unit in the wireless temperature measurement terminal respectively; The circuit of the resistance calculation unit is shown in Figure 5. The thermistor RT is connected to the circuit, and the resistance of the thermistor changes as the temperature changes. The measured resistance is input through pin 7 of U5A as shown in Figure 6. In the single-chip microcomputer U1 in the data processing unit circuit; the single-chip microcomputer converts the change of the resistance value into a temperature signal through calculation, and connects the 2 and 3 pins of the single-chip microcomputer U1 to the transmitting unit as shown in Figure 8, and the transmitting unit converts the temperature signal data Send to the wireless temperature measurement management machine 2 through the wireless network for processing. The circuit of the address control unit is shown in Figure 7, where S1 is an 8-bit dial switch, which can be used to set the address of the temperature measurement terminal.

The CPU plug-in part of the wireless temperature measurement terminal 3 adopts an embedded signal processor and a surface mount installation process to improve the reliability and stability of the system. In the data processing unit of the wireless temperature measurement terminal 3, JP3 is used to control the sleep and wake-up of the transmitting unit, and set the wireless transmitting part of the terminal to transmit data every 30 minutes, thereby greatly reducing energy consumption. The working state of the wireless temperature measuring terminal 3 adopts a dormant state between two adjacent transmission signals, and automatically wakes up when transmitting. The wireless temperature measurement terminal 3 can be made of fully enclosed waterproof and moisture-proof alloy material.

The wireless temperature measurement management machine 2 is used to receive the data signal uploaded by the wireless temperature measurement terminal 3, and process the data and compare the fixed values. The wireless temperature measurement management machine 2 includes a power supply and data receiving unit, a signal processing unit and a data output unit, and the connection diagram between each unit is shown in FIG. 3 . The power supply and data receiving unit are connected to the data transmitting unit of the wireless temperature measurement terminal 3 through the wireless network, the output ends of the power supply and data receiving unit are respectively connected to the signal processing unit and the data output unit, and the output ends of the signal processing unit are connected to the data output unit The input end of the data output unit is connected with the background system 1 through a cable.

The circuit of the power supply and data receiving unit is shown in Figure 9. It is used to provide power for the wireless temperature measurement management machine and receive the temperature signal from the wireless temperature measurement terminal. The temperature signal is sent to the The signal processing unit shown in Figure 10 sends the temperature signal to the data output unit shown in Figure 11 after being processed by the single-chip microcomputer U5, and the data transmission unit transmits the temperature signal to the background system 1 through a cable.

The wireless temperature measurement management machine 2 works according to the set conditions, and sends the data signal to the background computer system through the wireless network for unified management. The wireless temperature measurement management machine 2 can receive the data information sent by the wireless temperature measurement terminal 3 with 1 to 256 addresses. The upload part of the wireless temperature measurement management machine 2 uses RS232 to connect with the telecontrol system, and adopts a question-and-answer protocol to save system resources .

The background system 1 is used to process and save the data information transmitted from the wireless temperature measurement management machine 2 . Background system 1 is windows98/2000/NT operating system with friendly interface and easy operation. The staff only need to use the computer connected to the wireless local area network to log in as a legal user, and then they can log in to the management system through the web page.

Claims (2)

1. The wireless temperature measurement system in the substation is characterized in that: it includes a wireless temperature measurement management machine and several wireless temperature measurement terminals installed on each heating equipment of the substation, and the wireless temperature measurement terminal communicates with the wireless temperature measurement management machine through a wireless network. For communication, the wireless temperature measurement management machine performs data transmission with the background system through cables; The wireless temperature measurement terminal includes a power supply unit, a resistance value calculation unit, a data processing unit, an address control unit, and a data transmission unit, and the input end of the data processing unit is connected to the output end of the resistance value calculation unit and the input of the address control unit respectively. The terminal is connected, the output terminal of the data processing unit is connected with the data transmitting unit, and the power supply unit is respectively connected with the resistance calculation unit, the data processing unit, and the address control unit; The wireless temperature measurement management machine includes a power supply and data receiving unit, a signal processing unit, and a data output unit. The power supply and data receiving unit is connected to the data transmitting unit of the wireless temperature measurement terminal through a wireless network, and the output of the power supply and data receiving unit The terminals are also respectively connected with the signal processing unit and the data output unit, the output terminal of the signal processing unit is connected with the input terminal of the data output unit, and the output terminal of the data output unit is connected with the background system through a cable. 2. The wireless temperature measurement system in the substation according to claim 1, characterized in that: the power supply unit of the wireless temperature measurement terminal and the power supply and data receiving unit of the wireless temperature measurement management machine are powered by solar power or current transformers.