A lightning arrester state acquisition device

Abstract

The application belongs to the technical field of electrical equipment detection, and provides a lightning arrester state acquisition device, which comprises a voltage collector, an intermediate protective layer arranged below the voltage collector and abuttingly connected with the voltage collector, a signal processing unit arranged in the intermediate protective layer, the signal processing unit being electrically connected with the voltage collector, a protection assembly arranged below the intermediate protective layer, and a current collector arranged in the protection assembly, the current collector being electrically connected with the signal processing unit. The application has the advantage that the lightning arrester state acquisition device can be installed beside a line lightning arrester under uninterrupted power supply, line voltage and leakage current of the lightning arrester can be monitored in real time, and a sampling signal is processed and output, so that an operator can timely master the working state of the lightning arrester and ensure safe operation of a power line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment detection, and particularly relates to a lightning arrester state acquisition device. BACKGROUND

[0002] The lightning arrester is a kind of power safety device for protecting power lines from lightning disasters, and the performance of the lightning arrester has an important influence on the safe operation of the power lines. In order to timely grasp the operating condition of the lightning arrester, at present, the method of regularly conducting inspection by using lightning arrester leakage current measurement is mainly used. Since the circuit line is relatively high from the ground, the operation is cumbersome during the measurement work. In order to realize non-stop operation, the live working vehicle is generally used for live operation. This method needs to invest a lot of manpower and material resources during the measurement period, and is time-consuming and laborious. In addition, since the measurement period is long, the fault occurring during the interval cannot be timely found and diagnosed. SUMMARY

[0003] The present application aims to provide a lightning arrester state acquisition device to solve the above problems.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] A lightning arrester state acquisition device comprises:

[0006] a voltage collector;

[0007] an intermediate protective layer arranged below the voltage collector and abuttingly connected with the voltage collector, a signal processing unit being arranged in the intermediate protective layer, the signal processing unit being electrically connected with the voltage collector;

[0008] a protection assembly arranged below the intermediate protective layer in abutment, a current collector being arranged in the protection assembly, the current collector being electrically connected with the signal processing unit.

[0009] Further, the protection assembly comprises:

[0010] an upper protective plate abuttingly connected with the bottom of the intermediate protective layer;

[0011] a mounting plate, the device being connected with the lightning arrester through the mounting plate;

[0012] a lower protective plate, the lower protective plate being fixedly connected with the mounting plate and the upper protective plate through fixing screws.

[0013] Further, the upper protective plate is provided with an upper part of the current collector, the lower protective plate is provided with a lower part of the current collector, and when the lower protective plate is fixedly connected with the upper protective plate, the upper part of the current collector is in communication with the lower part.

[0014] Further, the upper and lower parts of the current collector are made of magnetic material.

[0015] Further, a positioning pin is arranged between the upper and lower parts of the current collector, and the positioning pin is used for positioning the upper and lower parts of the current collector.

[0016] Further, the signal processing unit comprises:

[0017] a voltage signal circuit, configured to acquire a bus voltage signal of the surge arrester collected by the voltage collector;

[0018] a current signal circuit, configured to acquire a leakage current signal of the surge arrester collected by the current collector;

[0019] a signal conditioning circuit, configured to convert the acquired voltage and current analog signals into digital signals;

[0020] a remote signal receiving circuit, configured to receive the voltage and current digital signals sent by the signal output circuit, analyze the signals of the surge arrester according to the digital signals, and determine the working state of the surge arrester.

[0021] Further, the signal processing unit further comprises:

[0022] a self-checking circuit, configured to acquire an alternating voltage signal and an alternating current signal of a preset value, and feed back the voltage and current signals after the signal conditioning circuit to the self-checking circuit to determine whether the voltage and current signals after conditioning are consistent with the voltage and current signals generated by the self-checking circuit.

[0023] Further, the signal processing unit further comprises:

[0024] a signal switching circuit, configured to send the acquired voltage and current analog signals to other state collection devices for signal processing and analysis when the signal conditioning circuit fails.

[0025] Further, the signal processing unit further comprises:

[0026] an induction power supply circuit, configured to supply power for the voltage collector;

[0027] The induction power supply circuit comprises:

[0028] a capacitor C1, a capacitor C2, a diode VD1, a diode VD2, a diode VD3, a diode VD4, a resistor R1, a transient voltage suppression diode TVS1 and a voltage stabilizing diode VD5;

[0029] One end of capacitor C1 is connected with a voltage collector, the other end of capacitor C1 is connected with ground, transient voltage suppression diode TVS1 is connected in parallel with capacitor C1, the positive pole of diode VD1 is connected with the voltage collector and the negative pole of diode VD2 respectively, the positive pole of diode VD2 is connected with the positive pole of diode VD3, the negative pole of diode VD3 is connected with ground, the positive pole of diode VD4 is connected with diode VD3, the negative pole of diode VD4 is connected with the negative pole of diode VD1 and one end of resistor R1, the other end of resistor R1 is connected with the negative pole of voltage stabilizing diode VD5, the positive pole of voltage stabilizing diode VD5 is connected with the positive pole of diode VD3 and the negative pole of diode VD4 respectively, capacitor C2 is connected in parallel with voltage stabilizing diode VD5, one end of voltage stabilizing diode VD5 connected with resistor R1 is connected with an external battery.

[0030] Compared with the prior art, the present application has at least the following advantages:

[0031] (1) The present application can be installed beside the line arrester in the case of uninterrupted power supply, and can monitor the line voltage and leakage current of the arrester in real time, and output the sampling signal after processing, so that the operating personnel can master the working state of the arrester in time and ensure the safe operation of the power line.

[0032] (2) The device adopts a magnetic structure, is divided into upper and lower parts, and has a positioning pin, so that it can be installed and replaced under power, and is easy to operate.

[0033] (3) The device has self-checking and mutual standby working modes, and can discover the fault of the device body in time and switch to the standby working mode.

[0034] (4) The induction power supply circuit of the present application can supply power to the device and charge the battery at the same time, and prolongs the working life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0036] Figure 2 is a circuit frame schematic diagram of a signal processing unit in an embodiment of the present application;

[0037] Figure 3 is a flow chart of signal processing in an embodiment of the present application;

[0038] Figure 4 is a circuit diagram of an induction power supply circuit in an embodiment of the present application. DETAILED DESCRIPTION

[0039] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications will also change accordingly.

[0040] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0041] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0043] The following are specific embodiments of the present application, and the technical solutions of the present application are further described in conjunction with the drawings, but the present application is not limited to these embodiments.

[0044] As shown in the drawings, the lightning arrester state acquisition device of the present application comprises a voltage collector 1, an intermediate protective layer 2 and a protective assembly 3. Figure 1

[0045] The voltage collector 1 is processed from a circular aluminum conductor, and in order to ensure the signal strength, the diameter of the conductor arc is greater than 10 cm.

[0046] The intermediate protective layer 2 is arranged below the voltage collector 1 and is in abutting connection with the voltage collector 1. A signal processing unit 21 is arranged in the intermediate protective layer 2, and the signal processing unit 21 is electrically connected with the voltage collector 1 through the lead-out wire 11 arranged on the voltage collector 1.

[0047] ​The signal processing unit 21 is externally provided with an intermediate protective layer 2 to ensure reliable outdoor operation, and the intermediate protective layer 2 has the functions of sun protection, rain protection, and frost protection.

[0048] The protective assembly 3 is arranged below the intermediate protective layer 2, and a current collector is arranged in the protective assembly 3 and electrically connected to the signal processing unit 21.

[0049] The protective assembly 3 includes an upper protective plate 31, a mounting plate 32, and a lower protective plate 33.

[0050] The upper protective plate 31 is connected to the bottom of the intermediate protective layer 2 in abutment, the device is connected to the arrester through the mounting plate 32, and the lower protective plate 33 is fixedly connected to the mounting plate 32 and the upper protective plate 31 through the fixing screws 34.

[0051] The upper protective plate 31 is connected to the bottom of the intermediate protective layer 2 in abutment, the device is connected to the arrester through the mounting plate 32, and the lower protective plate 33 is fixedly connected to the mounting plate 32 and the upper protective plate 31 through the fixing screws 34.

[0052] The upper protective plate 31 is connected to the bottom of the intermediate protective layer 2 in abutment, the device is connected to the arrester through the mounting plate 32, and the lower protective plate 33 is fixedly connected to the mounting plate 32 and the upper protective plate 31 through the fixing screws 34.

[0053] When the device is installed and replaced, the device is placed in the mounting plate 32 using an insulating operating rod, and after being adjusted to a suitable position, the upper part 41 of the current collector is preliminarily fixed on the mounting plate using the magnetism of the magnetic material of the contact surface of the upper and lower parts of the current collector, then the lower part 42 of the current collector is sent to the mounting plate using the insulating operating rod, and is connected to the upper part 41 of the current collector, in order to facilitate accurate connection, two positioning pins 5 are arranged, when the two positioning pins 5 are correctly connected, it indicates that the upper and lower parts of the current collector are connected, finally, the fixing screws 34 are fixed using the insulating operating rod, and the installation of the entire sampling device is completed. When disassembly is required, the operation process is reversed, the fixing screws 34 are first removed, then the lower part 42 of the current collector is removed, and finally the entire device is removed.

[0054] In a general three-phase power system, there are three phases A, B, and C, and therefore an arrester is installed on each phase, and the device is installed beside the arrester of each phase.

[0055] As shown in Figure 2 and Figure 3 , the signal processing unit includes a voltage signal circuit, a current signal circuit, a signal conditioning circuit, a remote signal receiving circuit, a self-checking circuit, a signal switching circuit, and an induction power supply circuit.

[0056] The voltage signal circuit is used to acquire the bus voltage signal of the surge arrester collected by the voltage collector, the current signal circuit is used to acquire the leakage current signal of the surge arrester collected by the current collector, the signal conditioning circuit is used to convert the acquired voltage and current analog signals into digital signals, and the remote signal receiving circuit is used to receive the voltage and current digital signals sent by the signal output circuit, and the signals of the surge arrester are analyzed according to the digital signals, and the working state of the surge arrester is judged.

[0057] When the signal processing unit of the device is working, it is first initialized, and then data is received for processing. The data mainly has two, one is the bus voltage signal of the surge arrester acquired by the voltage collector, and the other is the leakage current signal of the surge arrester acquired by the current collector. After the above data is received, it is selected by the signal switch. In the conventional state, the voltage and current signals are converted into digital signals by the signal conditioning circuit, and then the digital signals are sent to the remote signal receiving unit through the signal output circuit. The remote signal receiving unit analyzes the signals of the surge arrester and accurately discriminates the working state of the surge arrester.

[0058] The self-checking circuit is used to generate an AC voltage signal and an AC current signal of a preset value, which is fed back to the self-checking circuit after passing through the signal conditioning circuit to judge whether the conditioned voltage and current signals are consistent with the voltage and current signals generated by the self-checking circuit. If they are consistent, it means that the device is working normally, and the device continues to work.

[0059] Because the power line is long and complex, it is very inconvenient to check the working state of the state sampling device. Therefore, the state sampling device is provided with a self-checking circuit. The self-checking circuit is self-checked at regular intervals every day. When the self-checking circuit is working, it will generate an AC voltage signal and an AC current signal of a specified value, which is judged after passing through the signal conditioning circuit. If the conditioned voltage and current signals are consistent with the voltage and current signals generated by the self-checking circuit, it means that the device is working normally and can continue to work.

[0060] The signal switching circuit is used to send the collected voltage and current analog signals to other state sampling devices for signal processing and analysis when the signal conditioning circuit fails.

[0061] If the conditioned voltage and current signals are not consistent with the voltage and current signals generated by the self-checking circuit, it means that the signal conditioning circuit of the device has a fault, and its output signal cannot truly reflect the working state of the surge arrester. In order to realize real-time monitoring of the working state of the surge arrester during the waiting period for the replacement of the working personnel, the device adopts a mutual standby working mode. At this time, the signal switch is switched to the standby channel and sent to the collection device of the other phase, which is processed by the signal conditioning unit of the other phase and the signal output.

[0062] In addition, the device also monitors the signals of other phases, when the signal conditioning circuit of the installed sampling device of other phase fails, the voltage and current signals of other phase can be received, and corresponding conditioning and output are conducted.

[0063] The device is installed beside the power line, and cannot obtain low-voltage working power source nearby, therefore, the working power source of the device adopts battery power supply, the service life of the battery needs to be replaced in time, and the sampling device needs to be disassembled during replacement, which brings inconvenience to maintenance work, in order to reduce the maintenance work and prolong the working life of the battery, an induction power supply circuit is arranged.

[0064] The induction power supply circuit is used for power supply of the voltage collector, wherein the induction power supply circuit comprises a capacitor C1, a capacitor C2, a diode VD1, a diode VD2, a diode VD3, a diode VD4, a resistor R1, a transient voltage suppression diode TVS1 and a voltage stabilizing diode VD5.

[0065] One end of the capacitor C1 is connected with the voltage collector, the other end of the capacitor C1 is connected with the ground, the transient voltage suppression diode TVS1 is connected in parallel across the capacitor C1, the positive electrode of the diode VD1 is connected with the voltage collector and the negative electrode of the diode VD2 respectively, the positive electrode of the diode VD2 is connected with the positive electrode of the diode VD3, the negative electrode of the diode VD3 is connected with the ground, the positive electrode of the diode VD4 is connected with the diode VD3, the negative electrode of the diode VD4 is connected with the negative electrode of the diode VD1 and further connected with one end of the resistor R1, the other end of the resistor R1 is connected with the negative electrode of the voltage stabilizing diode VD5, the positive electrode of the voltage stabilizing diode VD5 is connected with the positive electrode of the diode VD3 and the negative electrode of the diode VD4 respectively, the capacitor C2 is connected in parallel across the voltage stabilizing diode VD5, and one end of the voltage stabilizing diode VD5 connected with the resistor R1 is connected with the external battery.

[0066] The lead-out wire of the voltage collector is connected to the capacitor C1, during the normal working time of the arrester, there is a distributed capacitance between the bus and the voltage collector, the distributed capacitance and the capacitor C1 form a voltage dividing circuit, the bus voltage induces an alternating voltage U1 across the capacitor C1, the voltage passes through the diode VD1, the diode VD2, the diode VD3, the diode VD4 and the resistor R1 to form a loop, and a direct current voltage U2 is formed across the capacitor C2, the voltage U2 supplies power to the sampling device on one side, and can charge the battery at the same time, so that the working time of the battery can be reduced, the battery can be charged in time, and the working life of the battery is prolonged. In the figure, the transient voltage suppression diode TVS1 protects the input circuit, when the overvoltage occurs in the bus of the power system, the overvoltage is generated across the capacitor C1, the transient voltage suppression diode TVS1 acts when the value reaches the action value, and the overvoltage is directly connected to the ground through the TVS1 to form a path, so that the following circuit is protected from damage. The voltage stabilizing diode VD5 is used for stabilizing the voltage across the capacitor C2, and the resistor R1 is a current limiting resistor, which prevents the working current from being too large to damage the voltage stabilizing diode VD5.

[0067] The application can be installed beside the line arrester in the case of uninterrupted power supply, real-time monitoring the line voltage, leakage current of the arrester, and outputting the sampling signal after processing, so that the operation personnel can master the working state of the arrester in time, and the safe operation of the power line is ensured.

[0068] The specific embodiments described herein are merely illustrative of the spirit of the application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the application or exceed the scope defined by the appended claims.

Claims

1. A lightning arrester state acquisition device characterized by comprising: The device comprises: a voltage collector; an intermediate protective layer arranged below the voltage collector and abuttingly connected with the voltage collector, a signal processing unit being arranged in the intermediate protective layer, the signal processing unit being electrically connected with the voltage collector; a protection assembly arranged below the intermediate protective layer, a current collector being arranged in the protection assembly, the current collector being electrically connected with the signal processing unit; the protection assembly comprises: an upper protective plate abuttingly connected with the bottom of the intermediate protective layer; a mounting plate, the device being connected with a lightning arrester through the mounting plate; a lower protective plate, the lower protective plate being fixedly connected with the mounting plate and the upper protective plate through fixing screws; an upper part of the current collector being arranged in the upper protective plate, a lower part of the current collector being arranged in the lower protective plate, the upper part and the lower part of the current collector being in communication when the lower protective plate is fixedly connected with the upper protective plate, the contact surfaces of the upper part and the lower part of the current collector with the mounting plate being magnetic materials; the signal processing unit comprises: a self-checking circuit, which is used to acquire an alternating voltage signal and an alternating current signal of a preset value, and feedback the voltage and current signals after signal conditioning to the self-checking circuit to judge whether the voltage and current signals after conditioning are consistent with the voltage and current signals generated by the self-checking circuit; a signal switching circuit, which is used to send the collected voltage and current analog signals to other state acquisition devices for signal processing and analysis when the signal conditioning circuit fails; the signal processing unit further comprises an induction power supply circuit; the induction power supply circuit comprises: a capacitor C1, a capacitor C2, a diode VD1, a diode VD2, a diode VD3, a diode VD4, a resistor R1, a transient voltage suppression diode TVS1 and a voltage stabilizing diode VD5; one end of the capacitor C1 is connected with the voltage collector, the other end of the capacitor C1 is connected with the ground, the transient voltage suppression diode TVS1 is connected in parallel across the capacitor C1, the positive electrode of the diode VD1 is connected with the voltage collector and the negative electrode of the diode VD2, the positive electrode of the diode VD2 is connected with the positive electrode of the diode VD3, the negative electrode of the diode VD3 is connected with the ground, the positive electrode of the diode VD4 is connected with the negative electrode of the diode VD3, the negative electrode of the diode VD4 is connected with the negative electrode of the diode VD1 and further connected with one end of the resistor R1, the other end of the resistor R1 is connected with the negative electrode of the voltage stabilizing diode VD5, the positive electrode of the voltage stabilizing diode VD5 is connected with the positive electrode of the diode VD3 and the negative electrode of the diode VD4, the capacitor C2 is connected in parallel across the voltage stabilizing diode VD5, and one end of the voltage stabilizing diode VD5 connected with the resistor R1 is connected with an external battery; the voltage collector lead is connected to the capacitor C1, during the normal working time of the lightning arrester, there is a distributed capacitor between the lightning arrester bus and the voltage collector, the distributed capacitor and the capacitor C1 form a voltage dividing circuit, the bus voltage induces an alternating voltage U1 across the capacitor C1, the alternating voltage U1 forms a loop through the diode VD1, the diode VD2, the diode VD3, the diode VD4 and the resistor R1, and a direct current voltage U2 is formed across the capacitor C2, the direct current voltage U2 is used to power the voltage collector.

2. The device according to claim 1, characterized in that, The positioning pin is arranged between the upper part and the lower part of the current collector and is used for butt joint positioning of the upper part and the lower part of the current collector.

3. The device according to claim 1, characterized in that, The signal processing unit comprises: A voltage signal circuit is arranged for acquiring the bus voltage signal of the surge arrester collected by the voltage collector. A current signal circuit is arranged for acquiring the leakage current signal of the surge arrester collected by the current collector. A signal conditioning circuit is arranged for converting the acquired voltage and current analog signals into digital signals. A remote signal receiving circuit is arranged for receiving the voltage and current digital signals sent by the signal output circuit, analyzing the signals of the surge arrester according to the digital signals, and judging the working state of the surge arrester.

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