Real-time monitoring device and system for action state of overhead line lightning arrester

Abstract

The embodiment of the utility model provides a real-time monitoring device and system for the action state of an overhead line lightning arrester, and belongs to the technical field of lightning arrester action monitoring. The real-time monitoring device comprises a lightning arrester module; the monitoring module is connected with the lightning arrester module and is used for recording the action times of the lightning arrester module; according to the utility model, the monitoring module records and displays the number of actions of the lightning arrester module in real time, the Rogowski coil magnetic ring synchronously generates an induced voltage for the actions of the lightning arrester module, the induced voltage is input into the analog-to-digital converter after being stabilized by the voltage stabilizing circuit, and the analog-to-digital converter converts an analog signal of the induced voltage into a digital signal. The digital signals can be subjected to action counting through the counting communication module, and the counting communication module can transmit the value of the action counting to a lightning arrester monitoring center, so that the action counting of the lightning arrester can be remotely inspected in real time, which is more convenient and safer.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester operation monitoring technology, specifically to a real-time monitoring device and system for the operation status of overhead line surge arresters. Background Technology

[0002] A surge arrester is an overvoltage protector or overvoltage limiter, a crucial device in power systems used to protect electrical equipment from high transient overvoltages and limit follow current duration. To ensure the safe and stable operation of the regional power grid system, it is necessary to monitor the number of surge arrester trips in the power grid system in real time and perform corresponding analysis and processing.

[0003] Currently, the JS-8A type discharge counter is commonly used in existing technologies to count the operating status of surge arresters. This JS-8A type discharge counter mainly consists of a valve plate, a silicon bridge rectifier, a capacitor, and an electromagnetic counter. The discharge counter utilizes the energy of the surge arrester (the follow current of the impulse current) to tap voltage across the valve plate. This voltage is then rectified by the silicon bridge rectifier, unidirectionally charging the capacitor, and discharging DC current into the electromagnetic counter coil, causing the counter to activate once, thus recording one operation. The specific structure can be as follows: Figure 1 As shown. However, the existing discharge counter can only display the number of times the surge arrester operates. In severe weather, it is inconvenient for staff to conduct timely inspections. Furthermore, when the discharge counter malfunctions, it cannot record the number of times the surge arrester operates, resulting in poor counting reliability.

[0004] In the process of developing this utility model, the applicant discovered that the above-mentioned solutions in the prior art have the defects of being difficult to inspect and having poor counting reliability. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a real-time monitoring device and system for the operation status of overhead line surge arresters. This real-time monitoring device and system for the operation status of overhead line surge arresters has the function of conveniently obtaining the number of surge arrester operations and high counting reliability.

[0006] To achieve the above objectives, one embodiment of this utility model provides a real-time monitoring device for the operating status of an overhead line surge arrester, comprising:

[0007] Surge arrester module;

[0008] A monitoring module, connected to the surge arrester module, is used to record the number of times the surge arrester module operates;

[0009] A Rogowski coil magnetic ring is fitted onto the circuit of the surge arrester module to detect the number of times the surge arrester module operates.

[0010] The input terminal of the voltage regulator circuit is connected to the output terminal of the Rogowski coil magnetic ring;

[0011] An analog-to-digital converter, with its input terminal connected to the output terminal of the voltage regulator circuit, is used to convert the regulated voltage signal into a digital signal.

[0012] The counting communication module has its input end connected to the output end of the analog-to-digital converter. It is used to count actions based on the digital signal and transmit the value of the action count to the surge arrester monitoring center.

[0013] Optionally, the surge arrester module includes:

[0014] Lightning arresters are installed on overhead power lines;

[0015] The first resistor has one end connected to the surge arrester and the other end grounded.

[0016] Optionally, the voltage regulator circuit includes:

[0017] The first capacitor has one end connected to the output terminal of the Rogowski coil magnetic ring, and the other end grounded.

[0018] The first chip has its GND pin grounded.

[0019] The first inductor has one end connected to one end of the first capacitor and the other end connected to the LX pin of the first chip.

[0020] The Zener diode has its positive terminal connected to the other end of the first inductor, and its negative terminal connected to the input terminal of the analog-to-digital converter, the CE pin of the first chip, and the OUT pin of the first chip.

[0021] The second capacitor has one end connected to the negative terminal of the Zener diode and the other end grounded.

[0022] Optionally, the counting communication module includes a microcontroller counter and a GPRS wireless communication terminal.

[0023] Optionally, the counting communication module includes a microcontroller counter.

[0024] Optionally, the monitoring module includes:

[0025] A rectifier module, wherein the two input terminals of the rectifier module are connected to the two ends of the first resistor;

[0026] The third capacitor has its two ends connected to the two output terminals of the rectifier module;

[0027] The counter is connected at one end to one end of the third capacitor and at the other end to the other end of the third capacitor.

[0028] Optionally, the rectifier module includes:

[0029] The negative terminal of the first diode is connected to one end of the first resistor, and the positive terminal is connected to one end of the third capacitor.

[0030] The negative terminal of the second diode is connected to the negative terminal of the first diode, and the positive terminal is connected to the other end of the third capacitor.

[0031] The negative terminal of the third diode is connected to the positive terminal of the second diode, and the positive terminal is connected to the other end of the first resistor;

[0032] The fourth diode has its positive terminal connected to the positive terminal of the third diode and its negative terminal connected to the positive terminal of the first diode.

[0033] On the other hand, this utility model also provides a real-time monitoring system for the operating status of overhead line surge arresters, including:

[0034] Lightning arrester monitoring center;

[0035] The real-time monitoring device described above is communicatively connected to the surge arrester monitoring center.

[0036] Through the above technical solution, the real-time monitoring device and system for the operation status of overhead line surge arresters provided by this utility model records and displays the number of times the surge arrester module operates in real time through the monitoring module. The Rogowski coil magnetic ring synchronously generates an induced voltage for the operation of the surge arrester module. After the induced voltage is regulated by the voltage stabilizing circuit, it is input to the analog-to-digital converter. The analog-to-digital converter converts the analog signal of the induced voltage into a digital signal. The digital signal can be used to count the operation through the counting communication module. The counting communication module can transmit the value of the operation count to the surge arrester monitoring center, thereby realizing remote real-time inspection of the surge arrester operation count, which is more convenient and safer. Moreover, when the monitoring module fails, the cooperation between the Rogowski coil magnetic ring and the counting communication module can serve as a backup monitoring circuit, thereby effectively improving the reliability of the real-time monitoring device in counting the operation of the surge arrester module.

[0037] Other features and advantages of this utility model embodiment will be described in detail in the following detailed description section. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This is a circuit block diagram of a real-time monitoring device for the operating status of an overhead line surge arrester according to one embodiment of the present invention.

[0040] Figure 2 This is a circuit diagram of a real-time monitoring device for the operating status of an overhead line surge arrester according to one embodiment of the present invention.

[0041] Figure 3 A circuit diagram of the voltage stabilizing circuit in a real-time monitoring device for the operating status of an overhead line surge arrester according to one embodiment of the present invention.

[0042] Description of Reference Numerals

[0043] 01. Surge arrester module; 02. Monitoring module

[0044] 03. Rogowski coil magnetic ring 04. Voltage regulator circuit

[0045] 05. Analog-to-digital converter 06. Counting communication module

[0046] S, surge arrester R1, first resistor

[0047] D1, first diode; D2, second diode

[0048] D3, third diode; D4, fourth diode

[0049] C1, first capacitor; C2, second capacitor

[0050] C3, third capacitor L1, first inductor

[0051] J, counter Da, Zener diode Detailed Implementation

[0052] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0053] Figure 1 This is a circuit diagram of a real-time monitoring device for the operational status of an overhead line surge arrester according to one embodiment of this utility model. Figure 1 The real-time monitoring device may include a surge arrester module 01, a monitoring module 02, a Rogowski coil magnetic ring 03, a voltage regulator circuit 04, an analog-to-digital converter 05, and a counting communication module 06.

[0054] Monitoring module 02 is connected to surge arrester module 01 and records the number of times surge arrester module 01 operates; specifically, this number of operations corresponds to the number of times surge energy is generated on surge arrester S. A Rogowski coil ferrite ring 03 is fitted onto the circuit of surge arrester module 01 to detect the number of operations. The input terminal of voltage regulator circuit 04 is connected to the output terminal of Rogowski coil ferrite ring 03, and the input terminal of analog-to-digital converter 05 (A / D converter) is connected to the output terminal of voltage regulator circuit 04 to convert the regulated voltage signal into a digital signal. The input terminal of counting communication module 06 is connected to the output terminal of analog-to-digital converter 05 to count operations based on the digital signal and transmit the count value to the surge arrester control center, i.e., the background monitoring system.

[0055] When monitoring the operational status of overhead line surge arresters is required, monitoring module 02 monitors and records the operational status of surge arrester module 01 in real time. Simultaneously, because the Rogowski coil magnetic ring 03 is fitted onto the line of surge arrester module 01, it generates an induced electromotive force / voltage when surge arrester module 01 operates. This induced voltage is regulated by voltage regulator circuit 04 and then converted to digital signal by analog-to-digital converter 05 to obtain the digital signal of surge arrester operation. Finally, counting and communication module 06 counts based on this digital signal to obtain the operation count of surge arrester S, and uploads the operation count value to the surge arrester monitoring center, facilitating real-time monitoring of the surge arrester operation count in the background.

[0056] Traditional surge arrester operation counting primarily uses the JS-8A discharge counter. However, this counter only displays the number of surge arrester operations, making timely inspections in inclement weather inconvenient for staff. Furthermore, if it malfunctions, it cannot count the surge arrester operations, resulting in poor reliability. In this embodiment of the invention, a surge arrester operation counting transmission circuit is constructed using a Rogowski coil magnetic ring 03, a voltage regulator circuit 04, an A / D converter, and a counting communication module 06. This improves both the convenience and safety of staff inspecting surge arrester operation counting and allows for continued operation counting of surge arrester module 01 even when monitoring module 02 malfunctions, thereby effectively enhancing the reliability of the real-time monitoring device's operation counting for surge arrester module 01.

[0057] In this embodiment of the present invention, the counting communication module 06 can also be a wired / wireless communication module, which directly outputs the digital signal from the analog-to-digital converter 05 to the surge arrester monitoring center. On the one hand, this facilitates the staff to analyze and monitor the impact energy of the surge arrester, and on the other hand, it can be counted at the surge arrester monitoring center to obtain the action count value of the surge arrester module 01.

[0058] In this embodiment of the present invention, such as Figure 2 As shown, the surge arrester module 01 may include a surge arrester S and a first resistor R1.

[0059] The surge arrester S is installed on the overhead line. One end of the first resistor R1 is connected to the surge arrester S, and the other end of the first resistor R1 is grounded.

[0060] When an overhead line is struck by lightning, the surge arrester S can allow the high-voltage surge current to be discharged into the ground through the first resistor R1, thereby limiting the overvoltage amplitude and protecting the insulation of electrical equipment from being broken down.

[0061] In this embodiment of the present invention, such as Figure 3 As shown, the voltage regulator circuit 04 may include a first capacitor C1, a first chip U1, a first inductor L1, a Zener diode Da, and a second capacitor C2.

[0062] One end of the first capacitor C1 is connected to the output terminal of the Rogowski coil 03, and the other end of the first capacitor C1 is grounded. The GND pin of the first chip U1 is grounded. One end of the first inductor L1 is connected to one end of the first capacitor C1, and the other end of the first inductor L1 is connected to the LX pin of the first chip U1. The anode of the Zener diode Da is connected to the other end of the first inductor L1, and the cathode of the Zener diode Da is connected to the input terminal of the analog-to-digital converter 05, the CE pin of the first chip U1, and the OUT pin of the first chip U1. One end of the second capacitor C2 is connected to the cathode of the Zener diode Da, and the other end of the second capacitor C2 is grounded.

[0063] The induced voltage on the Rogowski coil magnetic ring 03 is filtered at the input by the first capacitor C1, and at the output by the second capacitor C2. Specifically, the first inductor L1 is an inductor with an iron core, and the Zener diode Da further stabilizes the output voltage. Specifically, the first chip U1 is a DC-DC switching regulator, and the model of the first chip U1 may include NCP1400ASN50T1G. Using this voltage regulator circuit 04, the induced voltage can be effectively regulated to obtain a stable analog signal, which facilitates the operation of the subsequent analog-to-digital converter 05 and improves the accuracy of subsequent counting.

[0064] In this embodiment of the present invention, the analog-to-digital converter 05 may include devices / structures known to those skilled in the art. Specifically, for example, a conventional structure consisting of a voltage divider, a comparator, a register, and an encoder. Specifically, the specific model of the analog-to-digital converter 05 may include the PCF8591 module.

[0065] In this embodiment of the present invention, the specific form of the counting communication module 06 may include a microcontroller counter and a GPRS wireless communication terminal. Specifically, the microcontroller counter is connected to the GPRS wireless communication interrupt serial interface, and the GPRS wireless communication terminal is connected to an external antenna to receive and transmit wireless signals. This method enables the wireless transmission of the shock absorber's action count value to the surge arrester monitoring center.

[0066] In this embodiment of the present invention, the specific form of the counting communication module 06 may include a microcontroller counter. Specifically, the microcontroller counter transmits data to the surge arrester monitoring center via wired communication through an RS-485 interface.

[0067] In this embodiment of the present invention, the specific model of the microcontroller counter can include any microcontroller capable of counting known to those skilled in the art. Furthermore, the counter can be an FC875-DIN2N-CS-R, which can use an RS-485 interface for wired serial communication.

[0068] In this embodiment of the present invention, the driving power supply for the voltage regulator circuit 04, the analog-to-digital converter 05, and the counting communication module 06 may include, but is not limited to, external power supplies (lithium batteries) and conventional transformer circuits known to those skilled in the art.

[0069] In this embodiment of the present invention, an isolation circuit can be added between the Rogowski coil magnetic ring 03 and the voltage regulator circuit 04 to protect the relevant circuits.

[0070] In this embodiment of the present invention, such as Figure 2 As shown, the monitoring module 02 may include a rectifier module, a third capacitor C3, and a counter J.

[0071] The two input terminals of the rectifier module are connected to the two ends of the first resistor R1, and the two ends of the third capacitor C3 are connected to the two output terminals of the rectifier module. One end of the counter J is connected to one end of the third capacitor C3, and the other end of the counter J is connected to the other end of the third capacitor C3.

[0072] The rectifier module can rectify overvoltage into DC power and count the actions using counter J. Specifically, counter J can be, but is not limited to, a closed-loop electromagnetic circuit dual-pointer electromagnetic counting device known to those skilled in the art.

[0073] In this embodiment of the present invention, such as Figure 2 As shown, the rectifier module may include a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4.

[0074] The cathode of the first diode D1 is connected to one end of the first resistor R1, and the anode of the first diode D1 is connected to one end of the third capacitor C3. The cathode of the second diode D2 is connected to the cathode of the first diode D1, and the anode of the second diode D2 is connected to the other end of the third capacitor C3. The cathode of the third diode D3 is connected to the anode of the second diode D2, and the anode of the third diode D3 is connected to the other end of the first resistor R1. The anode of the fourth diode D4 is connected to the anode of the third diode D3, and the cathode of the fourth diode D4 is connected to the anode of the first diode D1.

[0075] The first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 form a bridge rectifier circuit, which can rectify AC power into DC power.

[0076] On the other hand, this utility model also provides a real-time monitoring system for the operating status of overhead line surge arresters. Specifically, the real-time monitoring system may include a surge arrester monitoring center and a real-time monitoring device. Specifically, the real-time monitoring device may include a surge arrester module 01, a monitoring module 02, a Rogowski coil magnetic ring 03, a voltage stabilizing circuit 04, an analog-to-digital converter 05, and a counting communication module 06.

[0077] Monitoring module 02 is connected to surge arrester module 01 and records the number of times surge arrester module 01 operates; specifically, this number of operations corresponds to the number of times impulse energy is generated on the surge arrester. A Rogowski coil ferrite ring 03 is fitted onto the circuitry of surge arrester module 01 to detect the number of operations. The input terminal of voltage regulator circuit 04 is connected to the output terminal of Rogowski coil ferrite ring 03, and the input terminal of analog-to-digital converter 05 (A / D converter) is connected to the output terminal of voltage regulator circuit 04 to convert the regulated voltage signal into a digital signal. The input terminal of counting communication module 06 is connected to the output terminal of analog-to-digital converter 05 to count operations based on the digital signal and transmit the count value to the surge arrester control center, i.e., the background monitoring system.

[0078] The monitoring device is connected to the surge arrester monitoring center. When monitoring the operational status of the overhead line surge arrester is required, the monitoring module 02 monitors and records the operational status of the surge arrester module 01 in real time. Simultaneously, because the Rogowski coil magnetic ring 03 is fitted onto the line of the surge arrester module 01, it generates an induced electromotive force / voltage when the surge arrester module 01 operates. This induced voltage is regulated by the voltage regulator circuit 04 and then converted to digital signal by the analog-to-digital converter 05 to obtain the digital signal of the surge arrester's operation. Finally, the counting communication module 06 counts based on this digital signal to obtain the operation count of the surge arrester S, and uploads the operation count value to the surge arrester monitoring center, facilitating real-time monitoring of the surge arrester's operation count in the background.

[0079] Through the above technical solution, the real-time monitoring device and system for the operation status of overhead line surge arresters provided by this utility model records and displays the number of operations of the surge arrester module 01 in real time through the monitoring module 02. The Rogowski coil magnetic ring 03 synchronously generates an induced voltage for the operation of the surge arrester module 01. The induced voltage is regulated by the voltage stabilizing circuit 04 and then input to the analog-to-digital converter 05. The analog-to-digital converter 05 converts the analog signal of the induced voltage into a digital signal. The digital signal can be used to count the operations through the counting communication module 06. The counting communication module 06 can transmit the operation count value to the surge arrester monitoring center, thereby enabling remote real-time inspection of the surge arrester operation count, which is more convenient and safer. In addition, when the monitoring module 02 fails, the cooperation between the Rogowski coil magnetic ring 03 and the counting communication module 06 can serve as a backup monitoring circuit, thereby effectively improving the reliability of the real-time monitoring device for counting the operations of the surge arrester module 01.

[0080] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0081] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A real-time monitoring device for the operational status of an overhead line surge arrester, characterized in that, include: Surge arrester module; A monitoring module, connected to the surge arrester module, is used to record the number of times the surge arrester module operates; A Rogowski coil magnetic ring is fitted onto the circuit of the surge arrester module to detect the number of times the surge arrester module operates. The input terminal of the voltage regulator circuit is connected to the output terminal of the Rogowski coil magnetic ring; An analog-to-digital converter, with its input terminal connected to the output terminal of the voltage regulator circuit, is used to convert the regulated voltage signal into a digital signal. The counting communication module has its input end connected to the output end of the analog-to-digital converter. It is used to count actions based on the digital signal and transmit the value of the action count to the surge arrester monitoring center.

2. The real-time monitoring device according to claim 1, characterized in that, The surge arrester module includes: Lightning arresters are installed on overhead power lines; The first resistor has one end connected to the surge arrester and the other end grounded.

3. The real-time monitoring device according to claim 2, characterized in that, The voltage regulator circuit includes: The first capacitor has one end connected to the output terminal of the Rogowski coil magnetic ring, and the other end grounded. The first chip has its GND pin grounded. The first inductor has one end connected to one end of the first capacitor and the other end connected to the LX pin of the first chip. The Zener diode has its positive terminal connected to the other end of the first inductor, and its negative terminal connected to the input terminal of the analog-to-digital converter, the CE pin of the first chip, and the OUT pin of the first chip. The second capacitor has one end connected to the negative terminal of the Zener diode and the other end grounded.

4. The real-time monitoring device according to claim 1, characterized in that, The counting communication module includes a microcontroller counter and a GPRS wireless communication terminal.

5. The real-time monitoring device according to claim 1, characterized in that, The counting communication module includes a microcontroller counter.

6. The real-time monitoring device according to claim 2, characterized in that, The monitoring module includes: A rectifier module, wherein the two input terminals of the rectifier module are connected to the two ends of the first resistor; The third capacitor has its two ends connected to the two output terminals of the rectifier module; The counter is connected at one end to one end of the third capacitor and at the other end to the other end of the third capacitor.

7. The real-time monitoring device according to claim 6, characterized in that, The rectifier module includes: The negative terminal of the first diode is connected to one end of the first resistor, and the positive terminal is connected to one end of the third capacitor. The negative terminal of the second diode is connected to the negative terminal of the first diode, and the positive terminal is connected to the other end of the third capacitor. The negative terminal of the third diode is connected to the positive terminal of the second diode, and the positive terminal is connected to the other end of the first resistor; The fourth diode has its positive terminal connected to the positive terminal of the third diode and its negative terminal connected to the positive terminal of the first diode.

8. A real-time monitoring system for the operational status of surge arresters on overhead lines, characterized in that, include: Lightning arrester monitoring center; The real-time monitoring device as described in any one of claims 1-7 is communicatively connected to the surge arrester monitoring center.

Images