Lightning arrester and electric power system

Abstract

The utility model discloses a lightning arrester and a power system, and relates to the technical field of power systems, and the lightning arrester comprises a lightning arrester body and a detection assembly. A mounting cavity is limited by the lightning arrester body, the lightning arrester body is provided with a low-voltage end and a high-voltage end which are oppositely arranged, a resistor disc core body is arranged in the mounting cavity, and two ends of the resistor disc core body are respectively connected with the low-voltage end and the high-voltage end; the detection assembly is arranged in the installation cavity and is used for detecting state parameters in the installation cavity of the lightning arrester body. According to the lightning arrester provided by the invention, the detection assembly is integrated in the mounting cavity of the lightning arrester body, so that various parameters such as voltage, temperature and humidity of the lightning arrester in an operation state can be monitored, and the occupied space of the lightning arrester can be reduced while stable operation of the lightning arrester is ensured.

Description

Technical Field

[0001] This application relates to the field of power system technology, and more specifically, to a surge arrester and a power system. Background Technology

[0002] A surge arrester is an overvoltage protection device widely used to protect high-voltage transmission lines and power equipment from lightning and switching overvoltages. Monitoring various parameters of the surge arrester, such as voltage, temperature, and humidity, during operation is crucial for ensuring its stable operation.

[0003] Traditional surge arrester status measurement devices are separate from the surge arresters. Due to limitations in measurement principles, they can often only provide feedback on some of the surge arrester's operating status parameters, such as leakage current and number of trips. They cannot provide a true and effective feedback on the complete operating status of the surge arrester. In addition, the measurement device is installed independently of the surge arrester, which requires a lot of installation space, and the measurement device itself can become a new hidden danger in the operation of the power system.

[0004] Furthermore, when the operating conditions of surge arresters are complex, the inspection and maintenance of surge arresters become more difficult.

[0005] Therefore, how to reduce the space occupied by surge arresters while ensuring their stable operation has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a surge arrester that reduces the space occupied by the surge arrester while ensuring stable operation.

[0007] Another objective of this application is to provide a power system having the aforementioned surge arrester.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A surge arrester, comprising:

[0010] The surge arrester body defines an installation cavity and has a low-voltage end and a high-voltage end arranged opposite to each other. A resistor core is provided inside the installation cavity, and the two ends of the resistor core are respectively connected to the low-voltage end and the high-voltage end.

[0011] A detection component is disposed within the mounting cavity and is used to detect the state parameters within the mounting cavity of the surge arrester body.

[0012] Optionally, in the above-mentioned surge arrester, the detection component includes a voltage detection element and a temperature and humidity detection element. The temperature and humidity detection element is used to detect the temperature and humidity values ​​inside the mounting cavity. The voltage detection element includes a voltage divider wire and a voltage sensor disposed on the voltage divider wire. The two ends of the voltage divider wire are respectively connected to the low-voltage end and the high-voltage end of the surge arrester body. The voltage sensor is used to detect the voltage values ​​at the low-voltage end and the high-voltage end of the surge arrester body.

[0013] Optionally, in the above-mentioned surge arrester, the resistor core includes a first core and a second core connected in parallel, and a current compensation unit is connected to the high-voltage end of the first core and the second core. The current compensation unit is used for switching between the first core and the second core. A communication module is connected to the low-voltage end of the first core and the second core. The communication module is connected to the current compensation unit through a transmission harness. The temperature and humidity detection element is connected to the transmission harness. The voltage sensor is connected to the communication module.

[0014] Optionally, in the above-mentioned surge arrester, the first core includes a first high-voltage electrode, the second core includes a second high-voltage electrode, the first high-voltage electrode is connected to the current compensation unit through a first high-voltage wiring, the second high-voltage electrode is connected to the current compensation unit through a second high-voltage wiring, and the low-voltage ends of the first core and the second core are connected to the communication module through low-voltage electrodes.

[0015] Optionally, the surge arrester also includes a high-voltage connection and a low-voltage connection. The high-voltage connection is used to connect the current compensation unit to the external high-voltage metal component, and the low-voltage connection is used to connect the communication module to the external low-voltage metal component.

[0016] Optionally, in the above-mentioned surge arrester, the temperature and humidity detection element includes a temperature sensor and a humidity sensor, which are connected in series on the transmission harness.

[0017] Optionally, the surge arrester described above also includes a cooling device connected to the transmission harness.

[0018] Optionally, in the above-mentioned surge arrester, the surge arrester body includes an insulating jacket, a first flange and a second flange, the first flange and the second flange being located at both ends of the insulating jacket, so that the insulating jacket, the first flange and the second flange surround and form the mounting cavity.

[0019] Optionally, in the above-mentioned surge arrester, both the first flange and the second flange are provided with through holes for the wire harness to pass through.

[0020] An electrical system comprising a surge arrester as described in any of the preceding claims.

[0021] The surge arrester provided in this application incorporates a resistor core within the mounting cavity of the arrester body, with both ends of the resistor core connected to the high-voltage and low-voltage ends of the arrester body, respectively, to achieve overvoltage protection. Simultaneously, a detection component is integrated within the mounting cavity, allowing for the monitoring of state parameters within the cavity. As illustrated above, the surge arrester provided in this application, by integrating the detection component into the mounting cavity of the arrester body, enables the monitoring of various parameters such as voltage, temperature, and humidity during operation. This ensures stable operation of the surge arrester while reducing its space requirements.

[0022] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a surge arrester provided in an embodiment of this application.

[0025] Among them, 100 is the surge arrester body, 101 is the mounting cavity, 102 is the low-voltage end, 1021 is the low-voltage wiring of the surge arrester, 103 is the high-voltage end, 1031 is the high-voltage wiring of the surge arrester, 104 is the resistor core, 1041 is the first core, 1042 is the second core, 1043 is the first high-voltage electrode, 1044 is the second high-voltage electrode, 1045 is the low-voltage electrode, 1046 is the first high-voltage wiring, 1047 is the second high-voltage wiring, 105 is the voltage divider wire, 106 is the voltage sensor, 107 is the current compensation unit, 108 is the communication module, 109 is the transmission harness, 110 is the temperature sensor, 111 is the humidity sensor, 112 is the cooling device, 113 is the insulating jacket, 114 is the first flange, and 115 is the second flange. Detailed Implementation

[0026] The core of this application is to provide a surge arrester that reduces the space occupied by the surge arrester while ensuring stable operation.

[0027] Another core aspect of this application is to provide a power system having the aforementioned surge arrester.

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Traditional surge arrester status measurement devices are separate from the surge arresters. Due to limitations in measurement principles, they can often only provide feedback on some of the surge arrester's operating status parameters, such as leakage current and number of trips. They cannot provide a true and effective feedback on the complete operating status of the surge arrester. In addition, the measurement device is installed independently of the surge arrester, which requires a lot of installation space, and the measurement device itself can become a new hidden danger in the operation of the power system.

[0030] Therefore, such as Figure 1 As shown in the figure, this application discloses a surge arrester, including a surge arrester body 100 and a detection component. By integrating the detection component into the mounting cavity 101 of the surge arrester body 100, it is possible to monitor various parameters such as voltage, temperature and humidity of the surge arrester during operation, thereby ensuring stable operation of the surge arrester and reducing the space occupied by the surge arrester.

[0031] The following will combine Figure 1 The surge arrester disclosed in the embodiments of this application will be explained and described in detail.

[0032] Among them, such as Figure 1As shown, the surge arrester body 100 has a low-voltage end 102 and a high-voltage end 103 disposed opposite to each other. The surge arrester body 100 may include an insulating jacket 113, a first flange 114, and a second flange 115, with the first flange 114 and the second flange 115 located at opposite ends of the insulating jacket 113, so that the insulating jacket 113, the first flange 114, and the second flange 115 enclose a mounting cavity 101. Simultaneously, the first flange 114 provides support and internal protection for the low-voltage end 102 of the surge arrester body 100 and can serve as the low-voltage end electrode of the surge arrester body 100. The second flange 115 provides support and internal protection for the high-voltage end 103 of the surge arrester body 100 and can serve as the high-voltage end electrode of the surge arrester body 100. Optionally, the insulating jacket 113 may be a porcelain jacket, which can provide external insulation for the surge arrester body 100 while providing support and internal protection. A resistor core 104 is provided in the mounting cavity 101, and the two ends of the resistor core 104 can be connected to the low-voltage end 102 and the high-voltage end 103 respectively to realize the overvoltage protection function of the surge arrester.

[0033] To monitor various status parameters of the surge arrester during operation, a detection component can be installed inside the mounting cavity 101 of the surge arrester body 100. This allows the detection component to detect the status parameters within the mounting cavity 101 of the surge arrester body 100, including the voltage value across the surge arrester body 100 and the temperature and humidity within the mounting cavity 101. By integrating the detection component into the mounting cavity 101 of the surge arrester body 100, the voltage, temperature, humidity, and other parameters of the surge arrester during operation can be monitored. This ensures stable operation of the surge arrester while reducing the space occupied by the surge arrester.

[0034] In some embodiments, such as Figure 1 As shown, the detection assembly may include a voltage detection element and a temperature and humidity detection element. The temperature and humidity detection element can detect the temperature and humidity values ​​within the mounting cavity 101. The voltage detection element may include a voltage divider line 105 and a voltage sensor 106 disposed on the voltage divider line 105. The voltage sensor 106 is connected to the low-voltage end 102 and the high-voltage end 103 of the surge arrester body 100 via the voltage divider line 105, respectively, to detect the voltage values ​​at the low-voltage end 102 and the high-voltage end 103 of the surge arrester body 100. The temperature and humidity detection element may include a temperature sensor 110 and a humidity sensor 111, thereby allowing the temperature value within the mounting cavity 101 of the surge arrester body 100 to be detected by the temperature sensor 110, and the humidity value within the mounting cavity 101 of the surge arrester body 100 to be detected by the humidity sensor 111.

[0035] In some embodiments, such as Figure 1As shown, the resistor core 104 may include a first core 1041 and a second core 1042 connected in parallel. A current compensation unit 107 is connected to the high-voltage terminals 103 of the first core 1041 and the second core 1042, allowing switching between the first core 1041 and the second core 1042 via the current compensation unit 107. A communication module 108 is connected to the low-voltage terminals 102 of the first core 1041 and the second core 1042, and the communication module 108 is connected to the current compensation unit 107 via a transmission harness 109. Temperature and humidity detection elements are connected to the transmission harness 109; that is, a temperature sensor 110 and a humidity sensor 111 can be connected in series on the transmission harness 109. A voltage sensor 106 can be connected to the communication module 108. The current compensation unit 107 may have a built-in current sensor or a separate current sensor electrically connected to it. When the current sensor detects the overcurrent signal generated by the deterioration of the zinc oxide resistor in the first core 1041, it can activate the switching switch inside the current compensation unit 107 to switch the main circuit to the second core 1042 and isolate the deteriorated first core 1041 from the main circuit, ensuring the normal operation of the surge arrester and improving the stability of the surge arrester.

[0036] It should be noted that one of the first core 1041 and the second core 1042 can be selected as the commonly used circuit resistor core and the other as the backup circuit resistor core. When the current compensation unit 107 detects an abnormal current, it can automatically activate the bypass circuit, adjust the current distribution, reduce the current amplitude flowing through the resistor core, and stop the continuous deterioration of the resistor core, thereby improving the reliability of the surge arrester and reducing equipment damage and power outages caused by surge arrester failure.

[0037] In some embodiments, such as Figure 1 As shown, the surge arrester also includes a built-in cooling device 112, which is connected to the transmission harness 109. When the temperature sensor 110 detects that the temperature inside the mounting cavity 101 of the surge arrester body 100 is overheated, the cooling device 112 will immediately activate. Through the thermoelectric cooling module of the cooling device 112, the internal temperature of the mounting cavity 101 of the surge arrester body 100 will be controlled, and the local overheated area will be rapidly cooled to prevent equipment damage caused by thermal runaway.

[0038] In some embodiments, the communication module 108 may be equipped with an early warning function. The communication module 108 can analyze the operating status and deterioration of the surge arrester in real time based on the data detected by the detection component, including voltage value, temperature value and humidity value, and transmit the relevant data and signals to the background management system and the mobile devices of maintenance personnel, so as to maintain the surge arrester, avoid human data monitoring and human judgment of the surge arrester, reduce the labor intensity of operation and maintenance personnel, and improve the efficiency and quality of operation and maintenance work.

[0039] In some embodiments, such as Figure 1 As shown, the first core 1041 may include a first high-voltage electrode 1043, and the second core 1042 may include a second high-voltage electrode 1044. The first high-voltage electrode 1043 can be connected to the current compensation unit 107 via the first high-voltage wiring 1046, and the second high-voltage electrode 1044 can be connected to the current compensation unit 107 via the second high-voltage wiring 1047. The low-voltage terminals 102 of the first core 1041 and the second core 1042 are connected to the communication module 108 via the low-voltage electrode 1045. Simultaneously, through holes are provided in both the first flange 114 and the second flange 115 for the wire harness to pass through, so that the current compensation unit 107 can be connected to the external high-voltage metal part via the surge arrester high-voltage wiring 1031, and the communication module 108 can be connected to the external high-voltage metal part via the surge arrester low-voltage wiring 1021, ensuring that current can flow through the surge arrester.

[0040] As can be seen from the above embodiments, the surge arrester disclosed in this application can achieve an integrated structure of the surge arrester and measuring device by embedding various sensors, algorithm chips, and communication modules 108 within the mounting cavity 101 of the surge arrester body 100. This allows for online monitoring, anomaly diagnosis, and fault early warning of various operating parameters of the surge arrester body. Furthermore, the built-in current compensation unit 107 enables the surge arrester to achieve self-recovery from anomalies and self-elimination of potential hazards, fundamentally improving the operational reliability, safety, and ease of maintenance of the surge arrester.

[0041] This application also discloses a power system including the surge arrester disclosed in the above embodiments. Therefore, the power system has all the technical effects of the surge arrester, which will not be repeated here.

[0042] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather not listed.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A surge arrester, characterized in that, include: A surge arrester body (100) is provided, which defines an installation cavity (101). The surge arrester body (100) has a low-voltage end (102) and a high-voltage end (103) arranged opposite to each other. A resistor core (104) is provided in the installation cavity (101). The two ends of the resistor core (104) are respectively connected to the low-voltage end (102) and the high-voltage end (103). A detection component is disposed within the mounting cavity (101) and is used to detect the state parameters within the mounting cavity (101) of the surge arrester body (100).

2. The surge arrester according to claim 1, characterized in that, The detection component includes a voltage detection element and a temperature and humidity detection element. The temperature and humidity detection element is used to detect the temperature and humidity values ​​inside the mounting cavity (101). The voltage detection element includes a voltage divider line (105) and a voltage sensor (106) disposed on the voltage divider line (105). The two ends of the voltage divider line (105) are respectively connected to the low-voltage end (102) and the high-voltage end (103) of the surge arrester body (100). The voltage sensor (106) is used to detect the voltage values ​​of the low-voltage end (102) and the high-voltage end (103) of the surge arrester body (100).

3. The surge arrester according to claim 2, characterized in that, The resistive chip core (104) includes a first core (1041) and a second core (1042) connected in parallel. A current compensation unit (107) is connected to the high voltage terminal (103) of the first core (1041) and the second core (1042). The current compensation unit (107) is used for switching between the first core (1041) and the second core (1042). A communication module (108) is connected to the low voltage terminal (102) of the first core (1041) and the second core (1042). The communication module (108) is connected to the current compensation unit (107) through a transmission harness (109). The temperature and humidity detection element is connected to the transmission harness (109). The voltage sensor (106) is connected to the communication module (108).

4. The surge arrester according to claim 3, characterized in that, The first core (1041) includes a first high-voltage electrode (1043), and the second core (1042) includes a second high-voltage electrode (1044). The first high-voltage electrode (1043) is connected to the current compensation unit (107) through a first high-voltage wiring (1046), and the second high-voltage electrode (1044) is connected to the current compensation unit (107) through a second high-voltage wiring (1047). The low-voltage terminals (102) of the first core (1041) and the second core (1042) are connected to the communication module (108) through a low-voltage electrode (1045).

5. The surge arrester according to claim 3, characterized in that, It also includes a surge arrester high-voltage wiring (1031) and a surge arrester low-voltage wiring (1021). The surge arrester high-voltage wiring (1031) is used to connect the current compensation unit (107) and the external high-voltage metal part, and the surge arrester low-voltage wiring (1021) is used to connect the communication module (108) and the external low-voltage metal part.

6. The surge arrester according to claim 3, characterized in that, The temperature and humidity detection element includes a temperature sensor (110) and a humidity sensor (111), which are connected in series on the transmission harness (109).

7. The surge arrester according to any one of claims 3 to 6, characterized in that, It also includes a cooling device (112) connected to the transmission harness (109).

8. The surge arrester according to claim 1, characterized in that, The surge arrester body (100) includes an insulating jacket (113), a first flange (114), and a second flange (115). The first flange (114) and the second flange (115) are located at both ends of the insulating jacket (113) so that the insulating jacket (113), the first flange (114), and the second flange (115) surround and form the mounting cavity (101).

9. The surge arrester according to claim 8, characterized in that, Both the first flange (114) and the second flange (115) have through holes for the wire harness to pass through.

10. An electric power system, characterized in that, Including the surge arrester as described in any one of claims 1 to 9.

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