FTU with lightning arrester monitoring function

Abstract

The FTU with the lightning arrester monitoring function comprises a current sensor, a temperature sensor, a humidity sensor and a pollution degree sensor which are connected with a lightning arrester, the output end of the current sensor is connected with a signal conditioning circuit, and the temperature sensor, the signal conditioning circuit, the humidity sensor and the pollution degree sensor are electrically connected with a control module. The control module is further electrically connected with a remote control module, a remote signaling module and a remote measurement module, the remote signaling module is in communication connection with a router, and the router is in communication connection with a server and a workstation. According to the utility model, the leakage current, temperature, humidity and surface pollution degree of the lightning arrester can be monitored, the three-remote function of the FTU is integrated, all monitoring and control information is sent to the router through a wireless network, remote monitoring is finally realized through the server and the work station, and the safety of a power transmission line and the inspection efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the field of distribution monitoring technology, and specifically relates to an FTU with a lightning arrester monitoring function. Background Technique

[0002] A lightning arrester is an electrical appliance used to protect electrical equipment from high transient overvoltages during lightning strikes, limit the follow-up current time, and often limit the follow-up current amplitude. A lightning arrester is sometimes also called an overvoltage protector or overvoltage limiter. A lightning arrester is an important high-voltage device in a substation. If potential hazards cannot be detected in time after it fails, it may cause large-scale failures, damage to power equipment, power outages of lines, etc. Therefore, the monitoring of lightning arresters is essential.

[0003] Traditional lightning arrester monitoring devices mainly rely on wired monitoring or manual monitoring. Due to the dispersion and large quantity of lightning arresters, most lightning arresters are installed in remote locations. If traditional methods are used to monitor lightning arresters, a large number of communication cables usually need to be laid, resulting in high costs. Secondly, manual inspection and monitoring consume a lot of manpower and material resources and have low efficiency. Therefore, there is an urgent need to design an intelligent lightning arrester monitoring terminal. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an FTU with a lightning arrester monitoring function to solve the problems raised in the above background technique.

[0005] To solve the above technical problem, an embodiment of the utility model provides the following technical solution: an FTU with a lightning arrester monitoring function, including: a current sensor, a temperature sensor, a humidity sensor, and a pollution degree sensor connected to the lightning arrester. The output end of the current sensor is connected to a signal conditioning circuit. The temperature sensor, the signal conditioning circuit, the humidity sensor, and the pollution degree sensor are electrically connected to a control module. The control module is also electrically connected to a remote control module, a remote signaling module, and a remote measurement module. The remote signaling module is communicatively connected to a router, and the router is communicatively connected to a server and a workstation.

[0006] Preferably, the current sensor adopts a linear current sensor ACS712.

[0007] Preferably, the signal conditioning circuit includes a signal amplification circuit and a low-pass filter circuit that are electrically connected in sequence.

[0008] Preferably, the control module is an MSP430 series single-chip microcomputer.

[0009] Preferably, the remote control module is a 433M wireless radio frequency chip.

[0010] Preferably, the remote signaling module is a 4G / 5G module, a LORA module, or an NB-IoT module.

[0011] Preferably, the telemetry module is an ATT7022B power acquisition chip.

[0012] Preferably, the workstation is an industrial computer.

[0013] The beneficial effects of the above technical solution of the present utility model are as follows:

[0014] The present utility model can monitor the leakage current, temperature and humidity, and surface contamination degree of the lightning arrester, and at the same time integrates the "three remote" functions of the FTU. All monitoring and control information is sent to the router through the wireless network, and finally remote monitoring is realized through the server and the workstation, improving the safety of the transmission line and the efficiency of inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall principle block diagram of the FTU with a lightning arrester monitoring function of the present utility model;

[0016] Figure 2 is the current sensor circuit diagram of the FTU with a lightning arrester monitoring function of the present utility model;

[0017] Figure 3 is the signal conditioning circuit diagram of the FTU with a lightning arrester monitoring function of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the technical problems, technical solutions and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the drawings and specific embodiments.

[0019] As Figure 1 shown, an FTU with a lightning arrester monitoring function includes: a current sensor 2, a temperature sensor 3, a humidity sensor 5, and a contamination degree sensor 6 connected to the lightning arrester 1. The output end of the current sensor 2 is connected to a signal conditioning circuit 4. The temperature sensor 3, the signal conditioning circuit 4, the humidity sensor 5, and the contamination degree sensor 6 are electrically connected to a control module 7. The control module 7 is also electrically connected to a remote control module 8, a remote signaling module 9, and a telemetry module 10. The remote signaling module 9 is communicatively connected to a router 12, and the router 12 is communicatively connected to a server 11 and a workstation 13.

[0020] As Figure 2 shown, the current sensor 2 uses a linear current sensor ACS712. When current flows through the conduction path from pins 1, 2 and 3, 4 of the ACS712, it generates a magnetic field sensed by a Hall effect sensor, which in turn is converted into a proportional output voltage, that is, the detected current value is indirectly obtained.

[0021] The signal conditioning circuit 4 includes a signal amplification circuit and a low-pass filter circuit that are electrically connected in sequence. As Figure 3 shown, the signal amplification circuit is an operational amplifier circuit based on the operational amplifier MAX4255A, and the low-pass filter circuit is a Butterworth filter circuit based on MAX4256.

[0022] The control module 7 is an MSP430 series single-chip microcomputer. The characteristics of the MSP430 single-chip microcomputer mainly include:

[0023] Ultra-low power consumption: The MSP430 single-chip microcomputer has excellent low-power performance and is suitable for battery-powered devices that run for a long time. Easy to operate: The MSP430 single-chip microcomputer provides rich peripheral interfaces and debugging functions, facilitating users to conduct development and testing. Powerful computing ability: The MSP430 single-chip microcomputer adopts a 16-bit central processing unit, enabling high-efficiency data processing. Wide operating voltage range: The MSP430 single-chip microcomputer can operate within the range of 1.8V to 3.6V, meeting the needs of various application scenarios.

[0024] The remote control module 8 is a 433M wireless radio frequency chip. The transmission distance of the 433MHz wireless module is affected by various factors, including the environment, weather, interference, etc. Under ideal conditions, that is, in an open environment with little interference, the communication distance of the 433MHz wireless module can reach more than 1000 meters.

[0025] The remote signaling module 9 is a 4G / 5G module, a LORA module, or an NB-IoT module. It realizes the communication between the FTU terminal and the remote server and the workstation, where the workstation 13 is an industrial computer.

[0026] The remote measurement module 10 is an ATT7022B electric energy acquisition chip. The measurement accuracy of active and reactive power of this chip reaches 0.2s and 0.5s respectively. The electrical parameters that can be measured include active, reactive, apparent power, bidirectional active, and four-quadrant reactive electric energy; the effective values of voltage and current; phase, frequency, etc. ATT7022B has the advantages of complete metering parameters and perfect meter calibration power.

[0027] The working principle of the present utility model is:

[0028] The current sensor 3 uses an open-type current transformer to monitor the leakage current of the lightning arrester without disassembling the lightning arrester. The monitored leakage current signal is adjusted to an acceptable range for the control module by the signal conditioning circuit 4. In addition, severe contamination on the surface of the lightning arrester will cause the temperature of some porcelain skirts of the porcelain bushing to rise. The reason is that the voltage distribution on the surface of the porcelain bushing of the lightning arrester is uneven, which affects the voltage distribution inside the lightning arrester. The contamination degree sensor 6 is used to detect the contamination degree on the surface of the lightning arrester to give an early warning for this problem. The temperature sensor and humidity sensor are used to detect the temperature and humidity of the lightning arrester respectively to avoid the physical impact on the lightning arrester caused by abnormal temperature and humidity. The remote control module, remote measurement module, and remote signaling module realize the corresponding "three remote" functions. All monitoring and control information is sent to the router through the wireless network, and finally remote monitoring is realized through the server and the workstation.

[0029] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An FTU with a lightning arrester monitoring function, characterized in that: include: A current sensor, a temperature sensor, a humidity sensor, and a pollution degree sensor connected to the lightning arrester; the output end of the current sensor is connected to a signal conditioning circuit; the temperature sensor, the signal conditioning circuit, the humidity sensor, and the pollution degree sensor are electrically connected to a control module; the control module is also electrically connected to a remote control module, a remote communication module, and a telemetry module; the remote communication module is communicatively connected to a router; and the router is communicatively connected to a server and a workstation.

2. The FTU with arrester monitoring function according to claim 1, characterized in that: The current sensor adopts a linear current sensor ACS712.

3. The FTU with arrester monitoring function according to claim 1, characterized in that: The signal conditioning circuit includes a signal amplifying circuit and a low-pass filtering circuit which are electrically connected in sequence.

4. The FTU with arrester monitoring function according to claim 1, characterized in that: The control module is a MSP430 series single chip microcomputer.

5. The FTU with arrester monitoring function according to claim 1, characterized in that: The remote control module is a 433M wireless radio frequency chip.

6. The FTU with arrester monitoring function according to claim 1, characterized in that: The remote signal module is a 4G / 5G module, a LORA module or a NB-IoT module.

7. The FTU with arrester monitoring function according to claim 1, characterized in that: The telemetry module is an ATT7022B power collection chip.

8. The FTU with arrester monitoring function according to claim 1, characterized in that: The workstation is an industrial computer.

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