On-line monitoring device for lightning arrester of power system

Abstract

The utility model provides an electric power system lightning arrester on-line monitoring device, which belongs to the technical field of lightning arrester monitoring and comprises a lightning arrester body and a mounting seat, a plurality of zinc oxide resistor discs are arranged in the lightning arrester body, the lightning arrester body is fixedly arranged on electric power equipment through the mounting seat, and the zinc oxide resistor discs are arranged on the zinc oxide resistor discs. The thermal induction assembly is composed of a plurality of thermal induction expansion rings and a power supply on-off device, the thermal induction expansion rings are arranged at the axis of the interior of the lightning arrester body, an annular groove is formed in the junction of the interior of the lightning arrester body and the thermal induction expansion rings, the power supply on-off device is arranged on the side wall of the annular groove, a mounting groove is formed in the top of the mounting base, and the power supply on-off device is arranged in the mounting groove. A clamping groove is formed in the bottom of the mounting groove, a current sensor is arranged in the clamping groove, a wireless communication module and a power supply are arranged at the bottom of the clamping groove, and through the structure, the problems that a traditional lightning arrester is inconvenient to monitor and needs to be measured by climbing a pole manually under the condition that power equipment is powered off, and real-time monitoring cannot be achieved are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arrester monitoring, in particular to an online monitoring device for lightning arresters in a power system. Background Art

[0002] In the power system, the arrester is an important protective device used to prevent lightning or other transient overvoltages from damaging the power system. However, the traditional method of monitoring the arrester usually needs to be carried out when the power equipment is out of power, and the staff climbs the pole to check and measure its resistance value and other parameters. This method not only consumes a lot of manpower and material resources, but also fails to achieve real-time monitoring and cannot detect potential failures of the arrester in time. Once the arrester fails, it may cause serious power accidents, resulting in large-scale power outages and equipment damage. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides an online monitoring device for lightning arresters in a power system, which is used to solve the above problems.

[0004] The utility model is achieved in this way:

[0005] An online monitoring device for lightning arresters in a power system, comprising a lightning arrester body and a mounting seat, wherein a plurality of zinc oxide resistors are arranged inside the lightning arrester body, and the lightning arrester body is fixedly arranged on power equipment through the mounting seat, comprising:

[0006] The thermal induction component includes a thermal induction expansion ring and a power on / off device, wherein a plurality of the thermal induction expansion rings are arranged at the inner axis of the arrester body, an annular groove is provided at the intersection of the interior of the arrester body and the thermal induction expansion ring, and the power on / off device is arranged on the side wall of the annular groove;

[0007] A mounting seat, wherein a mounting groove is provided at the top of the mounting seat, a card slot is provided at the bottom of the mounting groove, a current sensor is provided inside the card slot, a wireless communication module and a power supply are provided at the bottom of the card slot, and a mounting cover is provided at the top of the mounting groove;

[0008] The power supply is electrically connected to the current sensor and the wireless communication module respectively through the power on-off device.

[0009] In an embodiment of the present invention, the thermal induction expansion ring is composed of a rubber ring and a pressure ring A. The pressure ring A is arranged on the outside of the rubber ring, and the outer wall of the pressure ring A is circumferentially and evenly spaced with gaps.

[0010] In one embodiment of the utility model, the power on-off device includes an annular groove, which is arranged on the side wall of the annular groove, an elastic membrane is arranged on the inside of the annular groove on a side away from the annular groove, a pressure ring B is arranged on the side of the elastic membrane close to the pressure ring A, the pressure ring B is in contact with the pressure ring A, an electrode A is arranged on the other side of the elastic membrane, and an electrode B is arranged at a relative position of the annular groove.

[0011] In an embodiment of the present invention, the thermal sensing components and the current sensors form a group in pairs, and each group is independent of each other.

[0012] In an embodiment of the present invention, the electrode A and the electrode B are both metal rings.

[0013] In one embodiment of the present invention, the size of the electrode B is larger than the size of the electrode A.

[0014] The beneficial effects of the utility model are:

[0015] 1. Through the thermal sensing component composed of a thermal induction expansion ring and a power on-off device, the temperature change inside the arrester body is indirectly monitored by using the principle of thermal expansion and contraction. The wireless communication module transmits the electrical signal monitored by the current sensor to the upper control terminal to achieve the purpose of real-time monitoring.

[0016] 2. Multiple thermal sensing components are set inside the transformer body, which can more accurately determine the frequent overheating of zinc oxide resistors in a certain area, making it easier to find potential faults in the arrester body in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 for Figure 2 The structural diagram at A in the middle;

[0021] Figure 4 for Figure 2 The structural diagram at B in the middle;

[0022] Figure 5 It is a schematic diagram of the structure of the thermal induction expansion ring in the utility model.

[0023] In the figure: 10, lightning arrester body; 11, annular groove; 20, thermal sensing component; 21, thermal sensing expansion ring; 211, rubber ring; 212, pressure ring A; 213, gap; 22, power on / off device; 221, elastic membrane; 222, pressure ring B; 223, electrode A; 224, annular groove; 225, electrode B; 30, mounting seat; 31, mounting groove; 32, mounting cover; 33, card slot; 34, current sensor; 35, wireless communication module; 36, power supply. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-2 As shown, the utility model provides an online monitoring device for lightning arresters in an electric power system, including a lightning arrester body 10 and a mounting base 30. A plurality of zinc oxide resistors are arranged inside the lightning arrester body 10. The lightning arrester body 10 is fixedly arranged on the electric power equipment through the mounting base 30. A thermal sensing component 20 is arranged inside the lightning arrester body 10 for monitoring the overvoltage reaction of the lightning arrester. At the same time, a current sensor 34 and a wireless communication module 35 are arranged inside the mounting base 30 for transmitting the monitored overvoltage reaction to the upper control terminal in real time, so as to monitor with the staff in real time to avoid serious power accidents.

[0027] like Figure 3 As shown, the thermal induction component 20 includes a thermal induction expansion ring 21 and a power on-off device 22. Several thermal induction expansion rings 21 are arranged at the internal axis of the lightning arrester body 10. An annular groove 11 is opened at the intersection of the interior of the lightning arrester body 10 and the thermal induction expansion ring 21. The power on-off device 22 is arranged on the side wall of the annular groove 11.

[0028] In this embodiment, the thermal induction expansion ring 21 is composed of a rubber ring 211 and a pressure ring A212. The pressure ring A212 is arranged on the outside of the rubber ring 211. The outer wall of the pressure ring A212 is circumferentially evenly spaced with gaps 213. The gaps 213 facilitate the movement of the pressure ring A212 as the rubber ring 211 expands and contracts due to heat.

[0029] In this embodiment, the power on-off device 22 includes an annular groove 224, which is arranged on the side wall of the annular groove 11, and an elastic membrane 221 is arranged on the side of the annular groove 224 inside the annular groove 11, and a pressure ring B222 is arranged on the side of the elastic membrane 221 close to the pressure ring A212, and the pressure ring B222 is in contact with the pressure ring A212. An electrode A223 is arranged on the other side of the elastic membrane 221, and an electrode B225 is arranged at the relative position of the annular groove 224, wherein the electrode A223 and the electrode B225 are both metal rings, and the size of the electrode B225 is larger than the size of the electrode A223. When the electrode A223 approaches the electrode B225 and contacts the electrode B225, it is ensured that the electrode A223 can contact the electrode B225.

[0030] like Figure 2 As shown, a mounting slot 31 is provided at the top of the mounting seat 30, a card slot 33 is provided at the bottom of the mounting slot 31, a current sensor 34 is provided inside the card slot 33, and the current sensor 34 and the thermal sensing component 20 are in a one-to-one relationship. When the current sensor 34 reports a signal to the upper control terminal, the thermal sensing component 20 at a specific position can be determined, which is convenient for positioning. A wireless communication module 35 and a power supply 36 are provided at the bottom of the card slot 33, and a mounting cover 32 is provided at the top of the mounting slot 31. The power supply 36 is electrically connected to the current sensor 34 and the wireless communication module 35 through the power on / off device 22.

[0031] In this embodiment, the rubber ring 211 can be made of high-temperature vulcanized rubber with large thermal expansion and contraction changes, such as chloroprene rubber. When the zinc oxide resistor is overheated, the rubber ring 211 expands to cause the pressure ring A212 to squeeze the pressure ring B222, so that the electrode A223 and the electrode B225 are in contact. At this time, the current sensor 34 receives a signal.

[0032] It should be noted that the power on / off device 22, the power supply 36, the current sensor 34 and the wireless communication module 35 are connected by enameled metal wires, which are not shown in the figure.

[0033] In Example 1, there is only one thermal sensing component 20 and one current sensor 34. When an overvoltage occurs, the zinc oxide resistor will overheat. At this time, the thermal sensing expansion ring 21 begins to expand, thereby driving the pressure ring A212 to squeeze the pressure ring B222, so that the electrode A223 and the electrode B225 are in contact, and the circuit between the power supply 36 and the current sensor 34 is turned on. The current sensor 34 transmits the received electrical signal to the upper control terminal through the wireless communication module 35. The real-time monitoring of the temperature change inside the lightning arrester can achieve the purpose of timely discovering the potential fault of the lightning arrester.

[0034] In Example 2, there are four thermal sensing components 20 and four current sensors 34. Since the zinc oxide resistors inside the arrester are subjected to different overvoltages, which causes local temperature rise, multiple thermal sensing components 20 can more accurately locate the overvoltage situation.

[0035] Specifically, the working principle of the online monitoring device for lightning arresters in power systems is as follows: when the lightning arrester body 10 reacts with an overvoltage, the internal temperature rises, and the thermal induction expansion ring 21 makes the electrode A223 and the electrode B225 contact due to thermal expansion and contraction. The circuit between the power supply 36 and the current sensor 34 is turned on, and each group of thermal induction components 20 and current sensors 34 are independent of each other, which is convenient for accurately locating the temperature rise of the local zinc oxide resistor caused by overvoltage. The current sensor 34 transmits the received electrical signal to the upper control terminal through the wireless communication module 35. Through the above structure, the problem that traditional lightning arrester monitoring is inconvenient and requires manual pole climbing and measurement when the power equipment is out of power, and real-time monitoring cannot be performed is solved.

[0036] It should be noted that the specific models and specifications of the current sensor 34, wireless communication module 35 and power supply 36 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0037] The power supply and principle of the current sensor 34 , the wireless communication module 35 and the power supply 36 are clear to those skilled in the art and will not be described in detail herein.

[0038] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.

Claims

1. An online monitoring device for a lightning arrester in a power system, comprising a lightning arrester body (10) and a mounting seat (30), wherein a plurality of zinc oxide resistors are arranged inside the lightning arrester body (10), and the lightning arrester body (10) is fixedly arranged on a power device through the mounting seat (30), characterized in that: include: A thermal induction component (20) comprises a thermal induction expansion ring (21) and a power on / off device (22), wherein a plurality of the thermal induction expansion rings (21) are arranged at the inner axis of the arrester body (10), an annular groove (11) is provided at the intersection of the interior of the arrester body (10) and the thermal induction expansion ring (21), and the power on / off device (22) is arranged on the side wall of the annular groove (11); A mounting seat (30), wherein a mounting groove (31) is provided at the top of the mounting seat (30), a card slot (33) is provided at the bottom of the mounting groove (31), a current sensor (34) is provided inside the card slot (33), a wireless communication module (35) and a power supply (36) are provided at the bottom of the card slot (33), and a mounting cover (32) is provided at the top of the mounting groove (31); The power source (36) is electrically connected to the current sensor (34) and the wireless communication module (35) respectively through the power on / off device (22).

2. The online monitoring device for lightning arresters in a power system according to claim 1, characterized in that: The thermal induction expansion ring (21) is composed of a rubber ring (211) and a pressure ring A (212). The pressure ring A (212) is arranged on the outside of the rubber ring (211). The outer wall of the pressure ring A (212) is provided with gaps (213) equidistantly spaced in the circumferential direction.

3. The online monitoring device for lightning arresters in a power system according to claim 2, characterized in that: The power on-off device (22) comprises an annular groove (224), wherein the annular groove (224) is arranged on the side wall of the annular groove (11), an elastic membrane (221) is arranged on the inner side of the annular groove (11) away from the annular groove (224), a pressure ring B (222) is arranged on the side of the elastic membrane (221) close to the pressure ring A (212), the pressure ring B (222) is in contact with the pressure ring A (212), an electrode A (223) is arranged on the other side of the elastic membrane (221), and an electrode B (225) is arranged at a relative position of the annular groove (224).

4. The online monitoring device for lightning arresters in a power system according to claim 1, characterized in that: The thermal sensing components (20) and the current sensors (34) form a group in pairs, and each group is independent of each other.

5. The online monitoring device for lightning arresters in a power system according to claim 3, characterized in that: The electrode A (223) and the electrode B (225) are both metal rings.

6. The online monitoring device for lightning arresters in a power system according to claim 5, characterized in that: The size of the electrode B (225) is larger than the size of the electrode A (223).

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