Lightning arrester monitor for online monitoring

Abstract

The utility model provides a lightning arrester monitor for on-line monitoring, which is applied to the technical field of lightning arrester monitors and comprises an acquisition module, a mainboard and a power supply module which are fixedly mounted in a shell, the acquisition module is electrically connected with the mainboard, and the mainboard is electrically connected with the power supply module. An acquisition module, a main board and a power supply module are arranged in the lightning arrester monitor, an A-phase collector, a B-phase collector and a C-phase collector in the acquisition module are used for respectively acquiring leakage current of a lightning arrester, the collectors convert current signals into voltage signals, the voltage signals are amplified by an amplification circuit and then calculated by an MCU circuit, and the voltage signals are transmitted to the main board through the MCU circuit. A voltage signal is calculated by the MCU circuit after passing through the counting circuit, and then the MCU circuit sends a calculation result to the fusion terminal through a wired 485 or a wireless LORA or a wireless module TP1107, so that the problem that the lightning arrester does not need to be detached from a grounding loop when the lightning arrester is tested to judge whether the performance is good or not in the prior art is solved, and the effect of online detection is realized.

Description

Technical Field

[0001] The utility model relates to the field of lightning arrester monitoring instruments, in particular to a lightning arrester monitoring instrument used for online monitoring. Background Art

[0002] At present, the zinc oxide arrester online monitor is an instrument used in conjunction with the zinc oxide arrester in the high-voltage AC power system. It is connected in series in the arrester grounding loop. The collector in the monitor is used to monitor the leakage current through the arrester under the operating voltage, and is used to determine whether the inside of the arrester is damp, and whether the internal components are aged or deteriorated; the trigger in the monitor is used to record the number of overvoltages of the arrester. Since the online monitor is directly related to the safe operation of the relevant zinc oxide arrester, it is extremely important to test and judge its performance.

[0003] In our daily maintenance work, the calibration test of the lightning arrester is usually carried out offline. That is, the lightning arrester is first removed from the grounding loop, and then the independent lightning arrester is tested to determine whether its performance is good. Such a test requires the lightning arrester in operation to be removed from the grounding loop. Not only does the work need to consider certain safety factors, but it also requires considerable maintenance manpower. Therefore, there is an urgent need for a lightning arrester monitor that can increase work safety and save maintenance manpower. Utility Model Content

[0004] The utility model aims to provide a lightning arrester monitor for online monitoring in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A lightning arrester monitor for online monitoring, comprising a shell and a shell cover, wherein the shell and the shell cover are rotatably connected by a hinge, the outer edge of the shell cover is rotatably connected with a buckle, the outer edges of the shell and the shell cover on the same side are provided with a protrusion that fits with the buckle, the outside of the shell is connected to a collection module by wires, and a main board and a power supply module are fixedly installed inside, the collection module is electrically connected to the main board, the main board is electrically connected to the power supply module, and the power supply module is integrated with a protective device for providing a discharge path for surge static electricity.

[0007] Furthermore, the acquisition module includes an A-phase collector, a B-phase collector and a C-phase collector, the A-phase collector is electrically connected to the A-phase grounding loop of the lightning arrester, the B-phase collector is electrically connected to the B-phase grounding loop of the lightning arrester, and the C-phase collector is electrically connected to the C-phase grounding loop of the lightning arrester.

[0008] Furthermore, the main board is integrated with an amplifier circuit, a counting circuit and an MCU circuit. The amplifier circuit is used to amplify the current and voltage signals collected by the acquisition module, the counting circuit is used to count and measure the voltage and current signals collected by the acquisition module, and the MCU circuit is used to receive and process the signals of the amplifier circuit and the counting circuit, and send the calculation results to the fusion terminal via wired 485 or wireless LORA or wireless module TP1107.

[0009] Furthermore, the power module is compatible with two power supply modes, namely 3.7V battery power supply and 12V / 24V DC voltage power supply.

[0010] Furthermore, sealing strips are fixedly installed on the opposite surfaces of the shell and the shell cover.

[0011] Furthermore, the shell cover is made of a transparent acrylic plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By setting an acquisition module, a main board and a power module in the lightning arrester monitor, the leakage current of the lightning arrester is respectively collected by the A-phase collector, the B-phase collector and the C-phase collector in the acquisition module, the collector converts the current signal into a voltage signal, which is amplified by the amplifier circuit and calculated by the MCU circuit. The voltage signal is calculated by the MCU circuit after passing through the counting circuit, and then the MCU circuit sends the calculation result to the fusion terminal through the wired 485 or wireless LORA or the wireless module TP1107, which solves the problem of the prior art that when testing the lightning arrester to determine whether the performance is good, the lightning arrester does not need to be removed from the grounding loop, and the effect of online detection is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 A three-dimensional structural schematic diagram of the utility model is shown;

[0016] Figure 2 The utility model module connection schematic diagram is shown.

[0017] The following are the descriptions of the reference numerals:

[0018] 1. Shell; 2. Shell cover; 3. Hinge; 4. Buckle; 5. Phase A collector; 6. Phase B collector; 7. Phase C collector; 8. Sealing strip. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] like Figure 1-Figure 2 As shown, a lightning arrester monitor for online monitoring includes a shell 1 and a shell cover 2, the shell 1 and the shell cover 2 are rotatably connected by a hinge 3, the outer edge of the shell cover 2 is rotatably connected with a buckle 4, the outer edges of the shell 1 and the shell cover 2 on the same side are provided with a protrusion that fits with the buckle 4, the outside of the shell 1 is connected to a collection module by wires, and the inside of the shell 1 is fixedly installed with a main board and a power module, the collection module is electrically connected to the main board, the main board is electrically connected to the power module, and the power module is integrated with a protective device for providing a discharge path for surge static electricity.

[0023] like Figure 2As shown, the three-phase collectors A, B, and C respectively collect the leakage current of the lightning arrester. The collector converts the current signal into a voltage signal, which is amplified by the amplifier circuit and calculated by the MCU circuit. The voltage signal is calculated by the MCU circuit after passing through the counting circuit. The MCU circuit then sends the calculation result to the fusion terminal through wired 485 or wireless LORA or wireless module TP1107.

[0024] Among them, the collector is composed of a sampling valve plate, a silicon bridge rectifier, and a capacitor. The voltage generated on the valve plate by the discharge current passing through the lightning arrester is used to charge the capacitor through the silicon bridge rectifier and discharge it to the main board circuit.

[0025] Among them, the amplification circuit uses a high-precision zero-drift operational amplifier COS1333TR to achieve amplification, with an amplification factor of about 18 times. The current measurement range can reach 0-3mA, which can realize a large-range leakage current measurement.

[0026] Among them, the counting circuit uses a D flip-flop SN74AUP1G79DBVR. When lightning strikes, the output level of the flip-flop changes, and the MCU circuit counts.

[0027] Among them, the MCU circuit microcontroller adopts HC32L130J8TA-LQ48, which has a flexible power management system and can achieve ultra-low power consumption. The MCU circuit is sent to the fusion terminal through wired 485 or wireless LORA or wireless module TP1107.

[0028] Among them, the power module is compatible with two power supply modes, one is 3.7V battery power supply, and the other is 12V / 24V DC voltage power supply. It is equipped with a charging circuit to charge the battery to achieve sustainable operation. It can monitor power outages around the clock. At the same time, the power supply part uses DC-DC followed by LDO to reduce ripple.

[0029] Furthermore, sealing strips 8 are fixedly installed on the opposite surfaces of the shell 1 and the shell cover 2, which are used for sealing when the lightning arrester detector is in a closed state, thereby achieving the effect of waterproofing and dustproofing.

[0030] Furthermore, the shell cover 2 is made of a transparent acrylic plate material, which is convenient for operators to intuitively see the data and equipment status.

[0031] Working principle: When in use, the A phase collector 5, the B phase collector 6 and the C phase collector 7 in the acquisition module respectively collect the arrester leakage current, the collector converts the current signal into a voltage signal, which is amplified by the amplifier circuit and calculated by the MCU circuit. The voltage signal is calculated by the MCU circuit after passing through the counting circuit, and then the MCU circuit sends the calculation result to the fusion terminal through the wired 485 or wireless LORA or wireless module TP1107, which solves the problem of the prior art that when testing the arrester to determine whether the performance is good, there is no need to remove the arrester from the grounding loop, thereby achieving the effect of online detection.

[0032] The A-phase collector 5 , the B-phase collector 6 , the C-phase collector 7 and the power supply circuit are all universal standard parts or are known through conventional experimental methods, so no further description is given here.

[0033] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements shall fall within the scope of the utility model to be protected.

Claims

1. A lightning arrester monitor for online monitoring, comprising a housing (1) and a housing cover (2), wherein the housing (1) and the housing cover (2) are rotatably connected by a hinge (3), an outer edge of the housing cover (2) is rotatably connected to a buckle (4), and an outer edge of the housing (1) and the housing cover (2) on the same side is provided with a protrusion that fits with the buckle (4), characterized in that: The housing (1) is externally connected to a collection module via electric wires, and internally fixedly mounted with a mainboard and a power module, the collection module is electrically connected to the mainboard, the mainboard is electrically connected to the power module, and the power module is integrated with a protective device for providing a discharge path for surge static electricity.

2. The arrester monitor for online monitoring according to claim 1, characterized in that: The acquisition module comprises an A-phase collector (5), a B-phase collector (6) and a C-phase collector (7); the A-phase collector (5) is electrically connected to the A-phase grounding loop of the lightning arrester, the B-phase collector (6) is electrically connected to the B-phase grounding loop of the lightning arrester, and the C-phase collector (7) is electrically connected to the C-phase grounding loop of the lightning arrester.

3. The arrester monitor for online monitoring according to claim 1, characterized in that: The main board integrates an amplifier circuit, a counting circuit and an MCU circuit. The amplifier circuit is used to amplify the current and voltage signals collected by the acquisition module, the counting circuit is used to count and measure the voltage and current signals collected by the acquisition module, and the MCU circuit is used to receive and process the signals of the amplifier circuit and the counting circuit, and send the calculation results to the fusion terminal through wired 485 or wireless LORA or wireless module TP1107.

4. The arrester monitor for online monitoring according to claim 1, characterized in that: The power module is compatible with two power supply modes, namely 3.7V battery power supply and 12V / 24V DC voltage power supply.

5. The arrester monitor for online monitoring according to claim 1, characterized in that: Sealing strips (8) are fixedly mounted on the opposing surfaces of the shell (1) and the shell cover (2).

6. The arrester monitor for online monitoring according to claim 1, characterized in that: The shell cover (2) is made of a transparent acrylic plate.

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