CN219641839U - On-line monitoring device for AC/DC lightning arrester - Google Patents

Abstract

The utility model discloses an on-line monitoring device for an AC/DC arrester.A high-potential side module sends state information of a body module, an electric leakage current value and action frequency information of the arrester to a ground potential side module; the high-potential side module takes energy from a circuit where the high-potential side module is located, and converts the obtained energy into power supply voltage to realize self energy supply; the high-potential side module realizes overvoltage protection of the body module when the lightning arrester performs overvoltage protection; the ground potential side module is used for configuring basic parameters of the high potential side module and analyzing and processing the received information so as to realize on-line comprehensive monitoring of the lightning arrester.

Description

An online monitoring device for AC and DC arresters

technical field

The utility model relates to the technical field of wireless intelligent sensing and measurement, in particular to an on-line monitoring device for AC and DC lightning arresters.

Background technique

Gapless metal zinc oxide surge arresters have been widely used in power systems as overvoltage protection devices for power equipment. With the development of smart grid, especially the construction demand of smart substation/converter station, the application demand for online status monitoring such as the number of operations and leakage current online measurement of the gapless metal zinc oxide arrester itself has become more and more urgent. At present, most of the arrester intelligent online monitoring devices are mainly used in the arrester equipment for AC system overvoltage protection, and one end of the arrester is grounded. However, for metal zinc oxide arresters used for overvoltage protection in HVDC transmission systems, such as converter valve arresters, the voltage at both ends of the arrester is a non-sinusoidal AC voltage, and both ends of the arrester are at high potential, so in this application scenario The lightning arrester online monitoring device must simultaneously solve the technical problems of accurate measurement of high-potential online leakage current and action counting, device power supply, and electrical isolation between high potential and ground potential.

Utility model content

Therefore, the technical problem to be solved by the utility model is to overcome the technical problems that the lightning arrester online monitoring device can accurately measure the high-potential online leakage current and count the action, the power supply of the device, and the electrical isolation between the high potential and the ground potential, thereby providing an AC-DC On-line monitoring device for lightning arrester.

In order to achieve the above object, the utility model provides the following technical solutions:

The embodiment of the utility model provides an online monitoring device for an AC/DC arrester, including: a high potential side module and a ground potential side module, wherein, after the high potential side module is connected in series with the arrester, it is connected in parallel with the protected equipment; The module and the module on the ground potential side are connected by wireless communication; the module on the high potential side sends the status information of the main body module, the leakage current value, and the number of operations of the arrester to the module on the ground potential side; the module on the high potential side takes energy from the line where it is located, And convert the obtained energy into the power supply voltage to realize self-supply; the high potential side module realizes the overvoltage protection of the body module when the arrester overvoltage protection operates; the ground potential side module is used to configure the basic parameters of the high potential side module and The received information is analyzed and processed.

In one embodiment, the high potential side module includes: an overvoltage protection module, a counting module, an energy acquisition module, a leakage current acquisition module, and a processing module, wherein the first end of the arrester is connected to the first end of the protected device; The input terminal of the overvoltage protection module is connected in series with the branch circuit where the arrester is located; the first output terminal of the overvoltage protection module is connected to the input terminal of the counting module, the second output terminal of the overvoltage protection module is connected to the input terminal of the energy acquisition module, and the leakage current is collected The input terminal of the module is connected; the output terminal of the counting module, the output terminal of the energy-taking module, and the output terminal of the leakage current acquisition module are all connected with the processing module; Module overvoltage protection; when the arrester overvoltage protection operates and the operating current exceeds the first preset threshold, the counting module sends an action signal to the processing module, and the processing module starts the action counting; the energy-taking module takes power from the overvoltage protection module, and Convert it into a power supply voltage to realize self-energy supply; when the current in the energy harvesting module is overcharged, the leakage current acquisition module discharges the discharge energy; the leakage current acquisition module is used to collect the leakage current of the branch circuit where the arrester is located.

In one embodiment, the overvoltage protection module includes: a valve plate, a first voltage regulator, a second voltage regulator and a first resistor, wherein the first end of the arrester is connected to the first end of the protected device; the valve plate The first end of the arrester is connected to the second end of the arrester and the input end of the counting module, the second end of the valve plate is connected to the first end of the first voltage regulator; the second end of the first voltage regulator is connected to the input of the counting module terminal, the first terminal of the first resistor; the first terminal of the second regulator is connected to the second terminal of the valve plate and the second terminal of the protected equipment; the second terminal of the second regulator is connected to the first resistor The second end of the power supply module, the input end of the energy acquisition module, and the input end of the leakage current acquisition module are connected.

In one embodiment, the counting module includes: a second resistor, a first rectifier bridge, a first capacitor, a third resistor, and a photocoupler, wherein the AC side of the first rectifier bridge is connected to the first output terminal of the overvoltage protection module Connect, the AC side of the first rectifier bridge is also connected in parallel with the second resistor, the DC side of the first rectifier bridge is connected in parallel with the first capacitor; the first end of the photocoupler is connected with the DC side of the first rectifier bridge through the third resistor connection, the second end of the optocoupler device is connected to the DC side of the first rectifier bridge, and the third end of the optocoupler device is connected to the processing module; When the voltage exceeds the first preset threshold, the photoelectric coupling device sends an arrester action signal to the processing module.

In one embodiment, the energy harvesting module includes: a normally closed electronic switch, a second rectifier bridge, a second capacitor, a third capacitor, and a starting energy management circuit, wherein the AC side of the second rectifier bridge communicates with the power converter through the normally closed electronic switch. The second output end of the voltage protection module is connected, the AC side of the second rectifier bridge is also connected to the second end of the protected device, and the DC side of the second rectifier bridge is connected in parallel with the third capacitor; the first end of the start-up energy management circuit , the second end is connected to the DC side of the second rectifier bridge, the second end of the start energy management circuit is connected to the first end of the processing module, the third end of the start energy management circuit is connected to the second end of the processing module; overvoltage The output voltage of the protection module charges the second capacitor, and when the voltage of the second capacitor exceeds a second preset threshold, the energy management circuit is activated to adjust the input voltage and stabilize the output power supply voltage.

In one embodiment, the leakage current acquisition module includes: a normally open electronic switch, a fourth resistor and an operational amplifier, wherein the first end of the fourth resistor is connected to the second output terminal of the overvoltage protection module through the normally open electronic switch, The second terminal of the fourth resistor is connected to the second terminal of the protected device; the input terminal of the operational amplifier is connected in parallel with the fourth resistor, and the output terminal of the operational amplifier is connected to the processing module; when the normally open electronic switch is closed and the normally closed electronic switch When disconnected, the leakage current acquisition module starts to collect leakage current; when the normally open electronic switch is closed, the normally closed electronic switch is closed, and the current in the energy harvesting module is overcharged, the leakage current acquisition module discharges the energy.

In one embodiment, the module at the ground potential side includes: a router, a server, and a terminal connected in series in sequence, and the router communicates with the module at the high potential side.

In an embodiment, the ground potential side module further includes: a gateway, wherein the router communicates with the high potential side module through the gateway.

In one embodiment, the processing module has a built-in local accurate clock power supply; when the processing module receives the arrester action signal sent by the optocoupler device, it records the local clock signal; the processing module sends the data packet containing the arrester action event and its sending time information to the gateway.

In one embodiment, the gateway has a built-in wired clock synchronization network synchronized with UTC; the gateway estimates the lightning arrester based on the time when the processing module receives the arrester action signal, the time when the processing module sends the data packet, and the time when the gateway receives the data packet The world-coordinated moment at which the action takes place.

The technical scheme of the utility model has the following advantages:

In the online monitoring device for AC/DC arresters provided by the utility model, the high potential side module sends the status information of the body module, the leakage current value, and the operation times information of the arrester to the ground potential side module; the high potential side module obtains energy from the line where it is located, And convert the obtained energy into the power supply voltage to realize self-supply; the high potential side module realizes the overvoltage protection of the body module when the arrester overvoltage protection operates; the ground potential side module is used to configure the basic parameters of the high potential side module and The received information is analyzed and processed, so as to realize the online comprehensive monitoring of the arrester.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a composition diagram of a specific example of the online monitoring device provided by the embodiment of the present invention;

Fig. 2 is a composition diagram of another specific example of the online monitoring device provided by the embodiment of the present invention;

Fig. 3 is the specific topology of the high potential side module provided by the embodiment of the present invention;

Fig. 4 is a composition diagram of another specific example of the online monitoring device provided by the embodiment of the present invention;

Fig. 5 is a composition diagram of another specific example of the online monitoring device provided by the embodiment of the present invention.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, or it can be the internal communication of two components, it can be wireless connection, or it can be wired connection. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Example

The embodiment of the utility model provides an online monitoring device for an AC/DC arrester, which is applied to a grounded/non-grounded, AC/DC arrester. As shown in FIG. 1 , it includes: a high potential side module 1 and a ground potential side module 2 .

As shown in Figure 1, after the high potential side module 1 is connected in series with the lightning arrester VA0, it is connected in parallel with the protected equipment; the high potential side module 1 and the ground potential side module 2 are connected by wireless communication.

Specifically, in a practical application process, the high potential side module 1 is usually electrically connected in series with an AC/DC arrester through a cable, and then connected in parallel with the protected equipment.

Specifically, multiple high potential side modules 1 can communicate with the same ground potential side module 2, that is, the ground potential side module 2 can simultaneously monitor the status of multiple arresters VA0; or, the high potential side module 1 and the ground potential side module 2 One-to-one configuration, but only as an example, not as a limitation.

Specifically, the high-potential side module 1 sends the status information of the main body module, the leakage current value, and the operation times information of the arrester to the ground potential side module 2; the high-potential side module 1 obtains energy from the line where it is located, and converts the obtained energy into The power supply voltage realizes self-supply; the high-potential side module 1 realizes the overvoltage protection of the main body module when the overvoltage protection action of the arrester VA0 is activated.

Specifically, the ground potential side module 2 is used to configure the basic parameters of the high potential side module 1, and analyze and process the received information. The module 2 on the ground potential side can send configuration parameter information such as the signal transmission interval to the high potential side through the operation of the terminal man-machine interface.

Specifically, the high-potential-side module 1 and the ground-potential-side module 2 communicate wirelessly to avoid the use of high-cost optical fibers; the device can realize wireless network monitoring, further reducing the application cost of the device.

In a specific embodiment, as shown in FIG. 2 , the high potential side module 1 includes: an overvoltage protection module 11 , a counting module 12 , an energy harvesting module 13 , a leakage current collection module 14 and a processing module 15 .

Specifically, as shown in Figure 2, the first end of the arrester VA0 is connected to the first end of the protected device; the input end of the overvoltage protection module 11 is connected in series with the branch where the arrester VA0 is located; the first output of the overvoltage protection module 11 end is connected with the input end of the counting module 12, and the second output end of the overvoltage protection module 11 is connected with the input end of the energy acquisition module 13 and the input end of the leakage current acquisition module 14; the output end of the counting module 12, the energy acquisition module 13 The output end of the leakage current acquisition module 14 is connected with the processing module 15.

Specifically, when the overvoltage protection action of the arrester VA0 is activated, the overvoltage protection module 11 is used for overvoltage protection of each module in the subsequent stage; as shown in Figure 3, the overvoltage protection module 11 includes: a valve plate VA1, a first voltage regulator ZA0, the second regulator ZA1 and the first resistor R2, wherein the first end of the arrester VA0 is connected to the first end of the protected equipment; the first end of the valve plate VA1 is connected to the second end of the arrester VA0, and the counting module The input terminal of 12 is connected, the second terminal of the valve plate VA1 is connected with the first terminal of the first voltage regulator ZA0; the second terminal of the first voltage regulator ZA0 is connected with the input terminal of the counting module 12, the first terminal of the first resistor R2 One end connection; the first end of the second voltage regulator ZA1 is connected to the second end of the valve plate VA1 and the second end of the protected equipment, and the second end of the second voltage regulator ZA1 is connected to the second end of the first resistor R2 end, the input end of the energy harvesting module 13, and the input end of the leakage current collection module 14 are connected.

Specifically, when the arrester VA0 overvoltage protection action, and the operating current exceeds the first preset threshold, the counting module 12 sends an action signal to the processing module 15, and the processing module 15 starts the action counting; as shown in Figure 3, the counting module 12 includes : the second resistor R0, the first rectifier bridge B0, the first capacitor C0, the third resistor R1 and the photocoupler OPC, wherein the AC side of the first rectifier bridge B0 is connected to the first output end of the overvoltage protection module 11, The AC side of the first rectifier bridge B0 is also connected in parallel with the second resistor R0, and the DC side of the first rectifier bridge B0 is connected in parallel with the first capacitor C0; the first end of the photocoupler OPC is connected to the first rectifier through the third resistor R1 The DC side of the bridge B0 is connected, the second end of the optocoupler OPC is connected to the DC side of the first rectifier bridge B0 , and the third end of the optocoupler OPC is connected to the processing module 15 .

Specifically, when the overvoltage protection of the arrester VA0 operates, the operating current charges the first capacitor C0 , and when the voltage of the first capacitor C0 exceeds the first preset threshold, the optocoupler OPC sends an action signal of the arrester VA0 to the processing module 15 .

In Figure 3, when the arrester VA0 operates, a large current will be injected into the high-potential side module 1, and through the reasonable parameter design of the valve VA1, the first voltage regulator ZA0 and the second resistor R0, most of the energy will pass through the valve VA1 Absorption, a small part of energy charges the first capacitor C0 through the first rectifier bridge B0, and when the first capacitor C0 is charged to a certain threshold, the photoelectric coupling device OPC emits light. After the electrical-optical-electrical conversion and isolation, the signal passes through I/ The MCU in the O interface input processing module 15 starts action counting interrupt processing.

Specifically, the energy harvesting module 13 takes power from the overvoltage protection module 11 and converts it into a power supply voltage to realize self-supply; when the current in the energy harvesting module 13 is overcharged, the leakage current collection module 14 discharges the energy; as shown 3, the energy-taking module 13 includes: a normally closed electronic switch S0, a second rectifier bridge B1, a second capacitor C1, a third capacitor C2, and a starting energy management circuit PMIC, wherein the AC side of the second rectifier bridge B1 passes through a normally The closed electronic switch S0 is connected to the second output end of the overvoltage protection module 11, the AC side of the second rectifier bridge B1 is also connected to the second end of the protected device, and the DC side of the second rectifier bridge B1 is connected in parallel with the third capacitor C2 Connection; the first end and the second end of the start energy management circuit PMIC are connected to the DC side of the second rectifier bridge B1, the second end of the start energy management circuit PMIC is connected to the first end of the processing module 15, and the start energy management circuit PMIC The third terminal is connected to the second terminal of the processing module 15.

Specifically, the output voltage of the overvoltage protection module 11 charges the second capacitor C1, and when the voltage of the second capacitor C1 exceeds a second preset threshold, the power management circuit PMIC is activated to adjust the input voltage and stabilize the output power supply voltage.

In Figure 3, when the small leakage current passes through the arrester VA0 and the high potential side module 1, since the resistance values of the second resistor R0 and the first resistor R2 are much smaller than the valve plate VA1 used for overvoltage protection, the first voltage regulator The equivalent resistance of ZA0 and the second regulator ZA1, most of the leakage current is charged to the second capacitor C1 through the second resistor R0 and the first resistor R2, the normally closed electronic switch S0, and the second rectifier bridge B1, and the second When the voltage of capacitor C1 reaches a certain value, the energy management circuit PMIC is started to work, and the energy management circuit PMIC is started to adjust and stabilize its output voltage, which is used for subsequent loads including A/D interface, I/O interface, low-power central processing unit MCU and wireless transceiver The wireless R/S power supply. In order to prevent overcharging of the energy harvesting circuit, the MCU will check the preset value of the operating voltage, control the normally open electronic switch S1 to close, and discharge the energy through the fourth resistor R3.

Specifically, the leakage current collection module 14 is used to collect the leakage current of the branch where the arrester VA0 is located. As shown in Figure 3, the leakage current acquisition module 14 includes: a normally open electronic switch S1, a fourth resistor R3 and an operational amplifier OP, wherein the first end of the fourth resistor R3 communicates with the overvoltage protection module 11 through the normally open electronic switch S1 The second output terminal of the fourth resistor R3 is connected to the second terminal of the protected device; the input terminal of the operational amplifier OP is connected in parallel with the fourth resistor R3, and the output terminal of the operational amplifier OP is connected to the processing module 15 .

Specifically, when the normally open electronic switch S1 is closed and the normally closed electronic switch S0 is open, the leakage current acquisition module 14 starts to collect leakage current; when the normally open electronic switch S1 is closed and the normally closed electronic switch S0 is closed, the energy harvesting module 13 When the current is overcharged, the leakage current acquisition module 14 discharges the discharge energy.

In Fig. 3, during normal operation, the MCU unit of the processing module 15 controls the opening of the normally closed electronic switch S0 and the closing of the normally open electronic switch S1, the leakage current passes through the fourth resistor R3, and the voltage across the fourth resistor R3 passes through the operational amplifier After the OP is amplified, it is input to the A/D interface unit of the processing module 15. After the A/D conversion, the low-power MCU performs reading, storage and calculation processing. And the antenna AT transmits to the module 2 on the ground potential side. The setting of configuration parameters such as leakage current sampling and transmission interval can be remotely modified online through the operation of personnel on the ground potential side.

In a specific embodiment, as shown in FIG. 4 , the ground potential side module 2 includes: a router 21 , a server 22 and a terminal 23 sequentially connected in series, and the router 21 communicates with the high potential side module 1 .

Specifically, the wireless communication protocol between the high potential side module 1 and the ground potential side module 2 can adopt a low power wide area network system (LPWAN), such as LoRaWAN, and the communication protocol between the ground potential parts can adopt Ethernet or WiFi protocol.

In a specific embodiment, as shown in FIG. 5 , the ground potential side module 2 further includes: a gateway 24 , wherein the router communicates with the high potential side module 1 through the gateway 24 .

Specifically, in order to increase the communication reliability between the high potential side module 1 and the ground potential side module 2, a receiving gateway 24 can be added to the ground potential side module 2, and the site layout can be considered to produce a spatial difference gain effect.

In a specific embodiment, the processing module 15 has a built-in local accurate clock power supply; when the processing module 15 receives the arrester action signal sent by the photoelectric coupling device OPC, it records the local clock signal; the processing module 15 will include the data packet of the arrester action event and The sending time information is sent to the gateway.

In a specific embodiment, the gateway has a built-in wired clock synchronization network synchronized with UTC; the gateway is based on the moment when the processing module 15 receives the arrester action signal, the moment when the processing module 15 sends the data packet, and the moment when the gateway receives the data packet , to estimate the UTC time at which the arrester action occurs.

Specifically, the unified time scale principle for recording the action moment of the arrester:

(1) The gateway clock of module 2 on the ground potential side of the device is calibrated and synchronized with Coordinated Universal Time (UTC) through GPS, Beidou satellite system, or optical fiber Ethernet and other wired clock synchronization networks and protocols (such as IEC61588);

(2) Module 1 on the high potential side of the device has a local accurate clock source, but it is not synchronized with the clock of the device gateway;

(3) When the central processing unit MCU of module 1 on the high potential side of the device receives the action signal of the arrester, that is, the signal output by the optocoupler device OPC, it records the local clock signal at the same time, assuming that the recorded value at this moment is T0;

(4) The module 1 on the high potential side of the device transmits the arrester action event to the gateway by transmitting a wireless data packet, assuming that the transmission time is T1, which is also the time value recorded by the local clock;

(5) The time when the device gateway 24 receives the data packet is assumed to be T2, and T2 is the UTC time;

(6) According to the time T0 and T1 provided by the module 1 at the high potential side, the gateway can approximately estimate the UCO time T3 at which the arrester action occurs as follows: T3≈T2-(T1-T0). (Note: It is assumed that the air propagation time of the wireless signal is negligible).

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. An online monitoring device for an AC/DC arrester, characterized in that it comprises: a high potential side module (1) and a ground potential side module (2), wherein, After the high potential side module (1) is connected in series with the lightning arrester (VA0), it is connected in parallel with the protected equipment; The high potential side module (1) is connected to the ground potential side module (2) by wireless communication; The high potential side module (1) sends the status information of the main body module, the leakage current value, and the operation times information of the arrester (VA0) to the ground potential side module (2); the high potential side module (1 ) obtain energy from the line where it is located, and convert the obtained energy into a power supply voltage to realize self-supply; the high potential side module (1) realizes the overvoltage protection of the main body module when the overvoltage protection action of the arrester (VA0); The ground potential side module (2) is used for configuring the basic parameters of the high potential side module (1), and analyzing and processing the received information. 2. The on-line monitoring device for AC/DC arrester according to claim 1, characterized in that, the high potential side module (1) comprises: an overvoltage protection module (11), a counting module (12), an energy-taking module ( 13), leakage current acquisition module (14) and processing module (15), wherein, The first end of the arrester (VA0) is connected to the first end of the protected equipment; The input end of the overvoltage protection module (11) is connected in series with the branch where the arrester (VA0) is located; the first output end of the overvoltage protection module (11) is connected to the input end of the counting module (12) , the second output end of the overvoltage protection module (11) is connected to the input end of the energy acquisition module (13) and the input end of the leakage current acquisition module (14); The output end of the counting module (12), the output end of the energy-taking module (13), and the output end of the leakage current acquisition module (14) are all connected to the processing module (15); When the overvoltage protection of the lightning arrester (VA0) operates, the overvoltage protection module (11) is used for overvoltage protection of each module in the subsequent stage; When the overvoltage protection of the arrester (VA0) operates and the operating current exceeds the first preset threshold, the counting module (12) sends an action signal to the processing module (15), and the processing module (15) starts action count; The energy harvesting module (13) takes power from the overvoltage protection module (11), and converts it into a supply voltage to realize self-supply; when the current in the energy harvesting module (13) is overcharged, the The leakage current acquisition module (14) discharges electric energy; The leakage current collection module (14) is used to collect the leakage current of the branch where the lightning arrester (VA0) is located. 3. The on-line monitoring device for AC and DC arresters according to claim 2, characterized in that the overvoltage protection module (11) includes: a valve plate (VA1), a first voltage regulator (ZA0), a second voltage regulator (ZA1) and the first resistor (R2), where, The first end of the lightning arrester (VA0) is connected to the first end of the protected equipment; The first end of the valve plate (VA1) is connected to the second end of the arrester (VA0) and the input end of the counting module (12), and the second end of the valve plate (VA1) is connected to the second end of the arrester (VA0). a voltage regulator (ZA0) connected to the first end; The second end of the first voltage regulator (ZA0) is connected to the input end of the counting module (12) and the first end of the first resistor (R2); The first end of the second voltage regulator (ZA1) is connected to the second end of the valve plate (VA1) and the second end of the protected equipment, and the second end of the second voltage regulator (ZA1) It is connected with the second end of the first resistor (R2), the input end of the energy acquisition module (13), and the input end of the leakage current acquisition module (14). 4. The on-line monitoring device for AC and DC arresters according to claim 3, characterized in that the counting module (12) comprises: a second resistor (R0), a first rectifier bridge (B0), a first capacitor (C0 ), the third resistor (R1) and the photocoupler (OPC), wherein, The AC side of the first rectifier bridge (B0) is connected to the first output terminal of the overvoltage protection module (11), and the AC side of the first rectifier bridge (B0) is also connected to the second resistor (R0 ) are connected in parallel, and the DC side of the first rectifier bridge (B0) is connected in parallel with the first capacitor (C0); The first end of the optocoupler (OPC) is connected to the DC side of the first rectifier bridge (B0) through the third resistor (R1), and the second end of the optocoupler (OPC) is connected to the The DC side of the first rectifier bridge (B0) is connected, and the third end of the photoelectric coupling device (OPC) is connected with the processing module (15); When the overvoltage protection of the arrester (VA0) operates, the operating current charges the first capacitor (C0), and when the voltage of the first capacitor (C0) exceeds a first preset threshold, the photocoupler ( OPC) sends an arrester action signal to the processing module (15). 5. The on-line monitoring device for AC and DC arresters according to claim 2, characterized in that, the energy-taking module (13) comprises: a normally closed electronic switch (S0), a second rectifier bridge (B1), a second capacitor (C1), the third capacitor (C2) and the starting energy management circuit (PMIC), wherein, The AC side of the second rectifier bridge (B1) is connected to the second output terminal of the overvoltage protection module (11) through the normally closed electronic switch (S0), and the AC side of the second rectifier bridge (B1) The side is also connected to the second end of the protected equipment, and the DC side of the second rectifier bridge (B1) is connected in parallel with the third capacitor (C2); The first end and the second end of the starting energy management circuit (PMIC) are connected to the DC side of the second rectifier bridge (B1), and the second end of the starting energy management circuit (PMIC) is connected to the processing module (15) is connected to the first end, and the third end of the startup energy management circuit (PMIC) is connected to the second end of the processing module (15); The output voltage of the overvoltage protection module (11) charges the second capacitor (C1), and when the voltage of the second capacitor (C1) exceeds a second preset threshold, the power management circuit (PMIC) is activated ) regulates the input voltage and stabilizes the output supply voltage. 6. the on-line monitoring device for AC/DC arrester according to claim 5, characterized in that, the leakage current acquisition module (14) comprises: a normally open electronic switch (S1), a fourth resistor (R3) and an operational amplifier ( OP), where, The first end of the fourth resistor (R3) is connected to the second output end of the overvoltage protection module (11) through the normally open electronic switch (S1), and the second end of the fourth resistor (R3) The terminal is connected with the second terminal of the protected equipment; The input terminal of the operational amplifier (OP) is connected in parallel with the fourth resistor (R3), and the output terminal of the operational amplifier (OP) is connected with the processing module (15); When the normally open electronic switch (S1) is closed and the normally closed electronic switch (S0) is disconnected, the leakage current collection module (14) starts to collect leakage current; When the normally open electronic switch (S1) is closed, the normally closed electronic switch (S0) is closed, and the current in the energy acquisition module (13) is overcharged, the leakage current acquisition module (14) discharges the discharge energy. 7. The on-line monitoring device for AC/DC arrester according to claim 2, characterized in that, the ground potential side module (2) comprises: a router (21), a server (22) and a terminal (23) connected in series in sequence , the router (21) is communicatively connected to the high potential side module (1). 8. The on-line monitoring device for AC and DC arresters according to claim 7, characterized in that, the ground potential side module (2) further comprises: a gateway (24), wherein the router (21) passes through the gateway (24) Communicatively connected with the high potential side module (1). 9. The on-line monitoring device for AC/DC arrester according to claim 8, characterized in that, The processing module (15) has a built-in local accurate clock power supply; When the processing module (15) receives the arrester action signal sent by the photoelectric coupling device (OPC), it records the local clock signal; The processing module (15) sends the data packet including the lightning arrester action event and its sending time information to the gateway (24). 10. The on-line monitoring device for AC/DC arrester according to claim 9, characterized in that, The gateway (24) has a built-in wired clock synchronization network synchronized with UTC; The gateway (24) estimates the time when the processing module (15) receives the lightning arrester action signal, the time when the processing module (15) sends the data packet, and the time when the gateway (24) receives the data packet. The universally coordinated moment at which the operation of the arrester occurs.