Non-contact lightning arrester leakage current and lightning stroke frequency acquisition system

Abstract

The invention discloses a non-contact lightning arrester leakage current and lightning stroke frequency acquisition system. The system comprises a lightning arrester installed on high-voltage equipment; the monitoring acquisition system comprises a microampere-level opening-closing high-precision leakage current transformer clamped on the lightning arrester grounding wire, and a leakage current acquisition module and a lightning stroke frequency acquisition module which are respectively connected with the microampere-level opening-closing high-precision leakage current transformer; the leakage current acquisition module is used for acquiring leakage current data measured by the microampere open-close type high-precision leakage current transformer; and the lightning stroke frequency acquisition module is used for obtaining lightning stroke waveform characteristics according to the leakage current data measured by the microampere-level open-close type high-precision leakage current transformer so as to judge the occurrence of a lightning stroke event and counting the lightning stroke frequency. The problem that an existing data monitoring device cannot be completely isolated from the primary side to be connected into an electronic circuit is effectively solved, and online installation can be achieved.

Description

Technical Field

[0001] The present application relates to a non-contact arrester leakage current and lightning strike frequency collection system, belonging to the leakage current and lightning strike frequency collection technology field. Background Art

[0002] The collection of arrester leakage current and lightning strike frequency is an important part of power system monitoring, and is of great significance for ensuring the safe and stable operation of the power system. The collection of arrester leakage current is mainly achieved through online monitoring technology, such as the total leakage current method, the third harmonic method of resistive current and the compensation method for measuring resistive current, and the collection of lightning strike frequency is mainly achieved through lightning monitoring systems, such as lightning location systems and lightning counters;

[0003] In the existing collection system, the collection end is connected to the primary part, such as Figure 1 As shown in FIG. 1 , it is a circuit diagram of an existing electronic lightning arrester lightning strike frequency collection system, such as Figure 2 The figure shows a block diagram of an existing electronic lightning arrester lightning strike number and leakage current collection system. The collection ends are all connected to the primary part and are not completely isolated, so they cannot be installed online. Summary of the invention

[0004] According to one aspect of the present application, a non-contact arrester leakage current and lightning strike number acquisition system is provided, which effectively solves the problem that the existing monitoring data device cannot be completely isolated from the primary side and connected to the electronic circuit, and can realize online installation.

[0005] A non-contact arrester leakage current and lightning strike number collection system, characterized by comprising:

[0006] Lightning arresters installed on high voltage equipment;

[0007] The monitoring and acquisition system includes a microampere-level open-and-close high-precision leakage current transformer clamped on the arrester grounding wire, and a leakage current acquisition module and a lightning strike number acquisition module respectively connected to the microampere-level open-and-close high-precision leakage current transformer. The leakage current acquisition module is used to collect leakage current data measured by the microampere-level open-and-close high-precision leakage current transformer, and the lightning strike number acquisition module is used to obtain lightning strike waveform characteristics based on the leakage current data measured by the microampere-level open-and-close high-precision leakage current transformer to determine the occurrence of a lightning strike event and count the number of lightning strikes.

[0008] Furthermore, the leakage current collection module includes a leakage current collector for collecting leakage current data measured by the microampere-level open-close high-precision leakage current transformer.

[0009] Furthermore, the lightning strike number acquisition module includes a first signal processing module, a second signal processing module and a high-speed voltage collector;

[0010] The first signal processing module includes an integrator, an amplifier and a filter connected in sequence, and is used to pre-process the leakage current data;

[0011] The second signal processing module includes a shaper, which is used to shape the pre-processed leakage current data to obtain a square wave signal;

[0012] The high-speed voltage collector is used to collect the pulse waveform of the square wave signal and calculate the number of lightning strikes.

[0013] Furthermore, the leakage current collection module and the lightning strike number collection module are both connected to a power supply module;

[0014] The power supply module is connected to the leakage current collector;

[0015] The power supply modules are connected to the first signal processing module, the second signal processing module and the high-speed voltage collector.

[0016] Furthermore, it also includes a wireless transmission module;

[0017] The wireless transmission module is connected to the leakage current collector and the high-speed voltage collector respectively, and the collected leakage current data and lightning waveform characteristics are wirelessly transmitted to the host computer via the wireless transmission module.

[0018] Furthermore, the first signal processing module is implemented by a first signal processing circuit;

[0019] The first signal processing circuit includes a first integrator, a second integrator and a first amplifier, the first integrator is connected to the second pin of the first amplifier, a first resistor and a second resistor are connected in series between the first integrator and the first amplifier, the second integrator is connected to the third pin of the first amplifier, a first capacitor and a third resistor are connected between the first integrator and the first resistor and between the second integrator and the first amplifier, the first capacitor and the third resistor are connected in parallel, the fifth pin of the first amplifier is grounded through a fourth resistor R54, the sixth pin of the first amplifier is grounded through a fifth resistor, the seventh pin of the first amplifier U3 is connected to the input end of the fifth resistor through a sixth resistor, the first pin of the first amplifier is connected to the input end of the fourth resistor through a second capacitor, the second resistor and the first amplifier and the first amplifier and the second capacitor are connected through a third capacitor, the second two terminals of the third capacitor are connected in parallel with a seventh resistor, and the fourth and eighth pins of the first amplifier U3 are respectively connected to the positive and negative electrodes of the power supply;

[0020] An eighth resistor is connected between the first amplifier and the sixth resistor, one output end of the eighth resistor serves as a first output of the first amplifier, and the other output end of the eighth resistor is grounded via a fourth capacitor as a second output of the first amplifier.

[0021] Furthermore, the second signal processing module is implemented by a second signal processing circuit;

[0022] The second signal processing circuit includes a first connection terminal, a first operational amplifier, a first inverter, a second inverter and a second connection terminal;

[0023] The second pin of the first wiring terminal is connected to the third end of the first operational amplifier through a ninth resistor, a tenth resistor, and an eleventh resistor in sequence, the second end of the first operational amplifier is grounded through a twelfth resistor, the sixth end of the first operational amplifier is connected to the first inverter, the first inverter is connected to the second inverter, the second inverter is connected to the first pin of the second wiring terminal, the second pin of the second wiring terminal is grounded, and a fifth capacitor is connected between the output end of the second inverter and the ground end of the second wiring terminal;

[0024] The second pin of the first wiring terminal is connected to the ninth resistor via a thirteenth resistor and is grounded, the tenth resistor and the eleventh resistor are connected to the grounding end of the twelfth resistor via a fourteenth resistor, the first op amp and the twelfth resistor are connected as well as the first op amp and the first inverter via a fifteenth resistor, the seventh end and the fourth end of the first op amp are respectively connected to the positive and negative electrodes of a power supply, the end of the first op amp connected to the positive electrode of the power supply is grounded via a sixth capacitor, the end of the first op amp connected to the negative electrode of the power supply is connected to the ground via a seventh capacitor, the first pin of the second wiring terminal is connected to the high-speed voltage collector, and the high-speed voltage collector is connected to the wireless transmission module;

[0025] The first output of the first amplifier is connected to the second pin of the first wiring terminal.

[0026] Furthermore, the model of the first amplifier is OPA2188.

[0027] Further, the model of the first wiring terminal and the second wiring terminal is HEADER2;

[0028] The model of the first operational amplifier is OPA277;

[0029] The models of the first inverter and the second inverter are SN74LS04.

[0030] Furthermore, the model of the wireless transmission module is USR-DR15X.

[0031] The beneficial effects of this application include:

[0032] The non-contact arrester leakage current and lightning strike number acquisition system provided in the present application is connected to the grounding wire of the arrester through a microampere-level open-and-close high-precision leakage current transformer, which not only monitors the arrester leakage current, but also monitors the lightning strike signal waveform, effectively solving the problem that the existing monitoring data device cannot be completely isolated from the primary side and connected to the electronic circuit, thereby realizing online installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the circuit diagram of the existing electronic lightning arrester lightning strike number collection system;

[0034] Figure 2 This is a block diagram of the existing electronic lightning arrester lightning strike number and leakage current collection system;

[0035] Figure 3 This is an overall block diagram of a non-contact arrester leakage current and lightning strike number collection system for this application;

[0036] Figure 4 A circuit connection diagram of a first signal processing circuit in a non-contact arrester leakage current and lightning strike number acquisition system according to the present application;

[0037] Figure 5 This is a circuit connection diagram of a second signal processing circuit in a non-contact arrester leakage current and lightning strike number acquisition system of the present application. DETAILED DESCRIPTION

[0038] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0039] like Figure 3-5 As shown, a non-contact arrester leakage current and lightning strike number collection system is characterized by comprising:

[0040] Lightning arresters installed on high-voltage equipment;

[0041] The monitoring and acquisition system includes a microampere-level open-and-close high-precision leakage current transformer clamped on the arrester grounding wire, and a leakage current acquisition module and a lightning strike number acquisition module respectively connected to the microampere-level open-and-close high-precision leakage current transformer. The leakage current acquisition module is used to collect leakage current data measured by the microampere-level open-and-close high-precision leakage current transformer, and the lightning strike number acquisition module is used to obtain lightning strike waveform characteristics based on the leakage current data measured by the microampere-level open-and-close high-precision leakage current transformer to determine the occurrence of a lightning strike event and count the number of lightning strikes.

[0042] Specifically, the system adopts a non-contact design, avoiding the problem of direct contact with high-voltage equipment or lightning arresters in traditional monitoring methods, thereby improving the safety and reliability of the system. By connecting the micro-ampere-level open-close high-precision leakage current transformer to the grounding wire of the lightning arrester, it can monitor the leakage current of the lightning arrester and the waveform of the lightning signal, effectively solving the problem that the existing monitoring data device cannot be completely isolated from the primary side and connected to the electronic circuit, and realizing online installation.

[0043] Among them, the leakage current acquisition module collects the leakage current data on the arrester grounding wire in real time through the micro-ampere-level opening and closing high-precision leakage current transformer. These data can be used to evaluate the operating status and insulation performance of the arrester and timely discover potential safety hazards. The lightning strike number acquisition module determines the occurrence of lightning strikes based on the leakage current data measured by the micro-ampere-level opening and closing high-precision leakage current transformer. By analyzing the waveform characteristics of the leakage current, lightning strikes can be identified and counted. This provides important reference information for the lightning protection design and operation of the power system.

[0044] It is worth mentioning that the micro-ampere-level open-close high-precision leakage current transformer is based on the principle of electromagnetic induction. It uses a closed iron core and winding to convert the large current on the primary side into a small current on the secondary side for measurement. The primary winding of this transformer has fewer turns and is connected in series in the current circuit to be measured, while the secondary winding has more turns and is connected in series in the measuring instrument and protection circuit. When current flows through the primary side, the corresponding current will be induced on the secondary side, thereby realizing the measurement of leakage current. The micro-ampere-level open-close high-precision leakage current transformer can accurately measure tiny currents, and its measurement range can reach the micro-ampere level. The open-close design allows the transformer to be easily installed on the measured line, and the measurement can be performed without disconnecting the line. This design not only improves the convenience of measurement, but also ensures the safety of measurement. The micro-ampere-level open-close high-precision leakage current transformer adopts double-layer shielding technology and has super anti-interference ability. It can work stably in a complex interference environment to ensure the accuracy of the measurement results.

[0045] The leakage current acquisition module includes a leakage current collector, which is used to collect leakage current data measured by the microampere-level open-close high-precision leakage current transformer.

[0046] Among them, the leakage current collector is mainly used to collect leakage current data measured by micro-ampere-level open-close high-precision leakage current transformers. By collecting these leakage current data, abnormal conditions of equipment, such as aging, moisture or damage, can be discovered in time, so that corresponding measures can be taken to repair or replace them to ensure the safe and stable operation of the power system.

[0047] Specifically, the working process of the leakage current acquisition module is as follows: the microampere-level open-close high-precision leakage current transformer inputs the measured leakage current signal into the leakage current collector. The collector conditions the input signal, including filtering, amplification and other processing to improve the quality and accuracy of the signal. The conditioned signal is collected by the collector and converted into a digital signal for storage and transmission. The collector transmits the collected data to the host computer or monitoring system through the communication interface for further analysis and processing.

[0048] The lightning strike number acquisition module includes a first signal processing module, a second signal processing module and a high-speed voltage collector;

[0049] The first signal processing module includes an integrator, an amplifier and a filter connected in sequence, and is used to pre-process the leakage current data;

[0050] The second signal processing module includes a shaper, which is used to shape the pre-processed leakage current data to obtain a square wave signal;

[0051] The high-speed voltage collector is used to collect the pulse waveform of the square wave signal and calculate the number of lightning strikes.

[0052] Specifically, the lightning strike number acquisition module is mainly composed of three parts: a first signal processing module, a second signal processing module and a high-speed voltage collector. The first signal processing module includes an integrator, an amplifier and a filter connected in sequence. The integrator integrates the input leakage current data to smooth the data and remove noise. The amplifier amplifies the integrated signal for subsequent processing. The filter filters the amplified signal to further remove noise and interference and improve the accuracy of the signal. The second signal processing module mainly includes a shaper. The shaper shapes the pre-processed leakage current data and converts it into a square wave signal. The square wave signal has clear rising and falling edges, which is convenient for subsequent high-speed voltage collectors to collect and count. The high-speed voltage collector collects the pulse waveform of the square wave signal. Since the pulse waveform of the square wave signal has clear characteristics, the collector can accurately capture each pulse. According to the number of square wave signal pulses collected, the high-speed voltage collector can calculate the number of lightning strikes. Each lightning strike will generate one or more pulse signals. By counting the number of these pulse signals, the number of lightning strikes can be obtained. Among them, the lightning strike signal is integrated, amplified, and shaped into a square wave signal, and input into the high-speed voltage collector to collect the pulse waveform. One pulse is recorded once, and the number of lightning strikes corresponding to the corresponding time period can be accumulated to obtain the time, and the number of lightning strikes collected in the corresponding time period and its cumulative count can be recorded; among them, the model of the high-speed voltage collector is ZH-3111-14S5, and its number collection and counting are realized using existing software.

[0053] The workflow includes: the leakage current data is measured by a micro-ampere-level open-close high-precision leakage current transformer and input into the lightning strike number acquisition module. The first signal processing module pre-processes the leakage current data, including integration, amplification and filtering. The pre-processed signal enters the second signal processing module and is converted into a square wave signal by a shaper. The high-speed voltage collector collects the pulse waveform of the square wave signal and calculates the number of lightning strikes. The collected lightning strike number data can be transmitted to the host computer or monitoring system through the communication interface for further analysis and processing.

[0054] The leakage current collection module and the lightning strike number collection module are both connected to a power supply module;

[0055] The power supply module is connected to the leakage current collector;

[0056] The power supply modules are connected to the first signal processing module, the second signal processing module and the high-speed voltage collector.

[0057] Specifically, the power module directly supplies power to the leakage current collector to ensure that it can operate normally, thereby completing the task of collecting leakage current data. It also provides power to the first signal processing module (including integrator, amplifier and filter) so that these components can work stably and pre-process the leakage current data. The power module supplies power to the shaper in the second signal processing module to ensure that the shaper can accurately shape the pre-processed leakage current data into a square wave signal. The power module provides power to the high-speed voltage collector, enabling it to efficiently collect the pulse waveform of the square wave signal and accurately calculate the number of lightning strikes. The power module is responsible for providing stable and reliable power support for the entire system to ensure that each module can work normally.

[0058] Among them, with the support of the power module, the leakage current acquisition module can accurately collect leakage current data and transmit it to the first signal processing module for preprocessing. The preprocessed data is shaped by the second signal processing module and converted into a square wave signal. The high-speed voltage collector collects the pulse waveform of the square wave signal and calculates the number of lightning strikes. The entire system realizes real-time monitoring and recording of lightning strikes through the power supply and coordination of the power module.

[0059] Also includes a wireless transmission module;

[0060] The wireless transmission module is connected to the leakage current collector and the high-speed voltage collector respectively, and the collected leakage current data and lightning waveform characteristics are wirelessly transmitted to the host computer via the wireless transmission module.

[0061] Specifically, the wireless transmission module receives data from the leakage current collector and the high-speed voltage collector. The received data is transmitted to the host computer via wireless means (such as Wi-Fi, Bluetooth, Zigbee, LoRa, NB-IoT, etc.). In some cases, the wireless transmission module may need to convert the format of the received data to ensure that the data can be correctly transmitted and parsed between different devices. The wireless transmission module usually supports multiple communication protocols, such as HTTP, MQTT, CoAP, etc., to meet the needs of different application scenarios.

[0062] The wireless transmission module is connected to the leakage current collector through an appropriate interface to receive the leakage current data collected by it. Similarly, the wireless transmission module is also connected to the high-speed voltage collector through an appropriate interface to receive the lightning waveform characteristic data collected by it. The wireless transmission module communicates with the host computer wirelessly. The host computer can be a computer, smart phone, tablet computer and other devices, which are used to receive, display and analyze the transmitted data.

[0063] The first signal processing module is implemented by a first signal processing circuit;

[0064] like Figure 4 As shown, the first signal processing circuit includes a first integrator P3A, a second integrator P3G and a first amplifier U3, the first integrator P3A is connected to the second pin of the first amplifier U3, a first resistor R17 and a second resistor R143 are connected in series between the first integrator P3A and the first amplifier U3, the second integrator P3G is connected to the third pin of the first amplifier U3, a first capacitor C300 and a third resistor R30 are connected between the first integrator P3A and the first resistor R17 and between the second integrator P3G and the first amplifier U3, the first capacitor C300 and the third resistor R30 are connected in parallel, and the fifth pin of the first amplifier U3 is connected to the fifth pin of the first amplifier U3. The first amplifier U3 is grounded through a fourth resistor R54, the sixth pin of the first amplifier U3 is grounded through a fifth resistor R161, the seventh pin of the first amplifier U3 is connected to the input end of the fifth resistor R161 through a sixth resistor R163, the first pin of the first amplifier U3 is connected to the input end of the fourth resistor R54 through a second capacitor C67, the second resistor R143 and the first amplifier U3 are connected as well as the first amplifier U3 and the second capacitor C67 through a third capacitor C160 (integrating capacitor), the second ends of the third capacitor C160 are connected in parallel with a seventh resistor R52, and the fourth and eighth pins of the first amplifier U3 are connected to the positive and negative electrodes of the power supply respectively;

[0065] An eighth resistor R167 is connected between the first amplifier U3 and the sixth resistor R163, one output end of the eighth resistor R167 serves as a first output of the first amplifier U3, and the other output end of the eighth resistor R167 is grounded through a fourth capacitor C71 as a second output of the first amplifier U3.

[0066] Specifically, the first signal processing circuit integrates and amplifies the input signal through a combination of an integrator and an amplifier. The signal processing network composed of resistors and capacitors is used to adjust the amplitude, frequency response, phase and other characteristics of the signal to meet the requirements of subsequent processing. The output of the amplifier is divided by resistors and filtered by capacitors to provide two output signals for use by subsequent circuits.

[0067] The second signal processing module is implemented by a second signal processing circuit;

[0068] like Figure 5 As shown, the second signal processing circuit includes a connecting terminal JP1, an operational amplifier U19, an inverter U20F, an inverter U20E and a connecting terminal JP2;

[0069] The second signal processing circuit includes a first connection terminal JP1, a first operational amplifier U19, a first inverter U20F, a second inverter U20E and a second connection terminal JP2;

[0070] The second pin of the first wiring terminal JP1 is connected to the third end of the first operational amplifier U19 through the ninth resistor R4, the tenth resistor RW and the eleventh resistor R6 in sequence, the second end of the first operational amplifier U19 is grounded through the twelfth resistor R8, the sixth end of the first operational amplifier U19 is connected to the first inverter U20F, the first inverter U20F is connected to the second inverter U20E, the second inverter U20E is connected to the first pin of the second wiring terminal JP2, the second pin of the second wiring terminal JP2 is grounded, and a fifth capacitor C9 is connected between the output end of the second inverter U20E and the ground end of the second wiring terminal JP2;

[0071] The second pin of the first wiring terminal JP1 is connected to the ninth resistor R4 through the thirteenth resistor R5, the tenth resistor RW and the eleventh resistor R6 are connected to the ground end of the twelfth resistor R8 through the fourteenth resistor R, the first operational amplifier U19 and the twelfth resistor R8 are connected as well as the first operational amplifier U19 and the first inverter U20F through the fifteenth resistor R7, the seventh end and the fourth end of the first operational amplifier U19 are respectively connected to the positive and negative electrodes of the power supply, the end of the first operational amplifier U19 connected to the positive electrode of the power supply is grounded through the sixth capacitor C7, the end of the first operational amplifier U19 connected to the negative electrode of the power supply is connected to the ground through the seventh capacitor C1, the first pin of the second wiring terminal JP2 is connected to the high-speed voltage collector, and the high-speed voltage collector is connected to the wireless transmission module;

[0072] The first output of the first amplifier U3 is connected to the second pin of the first wiring terminal JP1.

[0073] Specifically, the second signal processing circuit performs zero-crossing detection amplification processing on the input signal through the operational amplifier U19, and then shapes and phase-inverts the signal through the inverters U20F and U20E. The signal processing network composed of resistors and capacitors is used to adjust the amplitude, frequency response, phase and other characteristics of the signal. Finally, the processed signal is output to the subsequent circuit or external device through JP2.

[0074] It is worth mentioning that U3: OPA2188 is a dual op amp. The first op amp is composed of pins 1, 2, and 3 and is used as an integrator. R17 and R143 are integrating resistors, and C160 is an integrating capacitor. The integrator parameters can be changed by adjusting the size of R143 (potentiometer resistor). The second op amp of U3 is composed of pins 5, 6, and 7 and is used as an amplifier. The amplification factor is determined by R163 / R161 (the value shown in the figure is 20 times). The lightning signal is collected by the sensor, integrated by the integrator, amplified, and then filtered by the low-pass filter composed of R167 and C71 and output to JP1. Figure 5 As shown; U19: OPA277 operational amplifier and surrounding resistors form a zero-crossing detection circuit, which converts the lightning signal waveform input by JP1 into a square wave signal. U20F shapes the square wave signal (making the square wave more perfect, the edge steeper, etc.), but the phase is reversed, so U20E reverses again to keep the phase of the lightning signal unchanged. This lightning signal square wave is collected and counted by the high-speed voltage collector.

[0075] The model of the first amplifier U3 is OPA2188.

[0076] Specifically, the OPA2188 is an operational amplifier produced by Texas Instruments (TI). The main features of the OPA2188 are: Low offset voltage: The maximum value is 25μV, which helps ensure the accuracy of the signal. Zero drift: 0.03μV / ℃, which means that the amplifier's output offset voltage changes very little when the temperature changes, thereby ensuring the stability of the signal. Low noise: The noise in the range of 0.1Hz to 10Hz is 0.25μVPP, which makes it excel in applications that require high precision and low noise. Excellent DC precision: It has a high power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR), which are 142dB and 146dB respectively, which helps reduce the impact of external interference on the circuit. High gain bandwidth: The gain bandwidth is 2MHz, which is suitable for a variety of signal processing needs. Wide supply voltage range: It can operate in a supply voltage range of 4V to 36V (±2V to ±18V), providing flexible power supply options. Rail-to-Rail Output: The input common-mode range includes the negative rail, and the output can swing to within 15mV of the rails, which helps to fully utilize the dynamic range of the power supplies. Tiny Package: Available in micro small outline (MSOP)-8 and small outline (SO)-8 packages for easy use in compact applications.

[0077] The models of the first wiring terminal JP1 and the second wiring terminal JP2 are HEADER2;

[0078] The model of the first operational amplifier U19 is OPA277;

[0079] The model of the first inverter U20F and the second inverter U20E is SN74LS04 (containing 6 directions).

[0080] Specifically, HEADER2 is usually used for circuit connection and debugging. It consists of a row of pins, usually arranged in 2x10 or 2x20, which can be connected to other electronic components or circuit boards;

[0081] The OPA277 op amp is unity-gain stable and has a high slew rate (2.3V / μs) and wide bandwidth (8MHz). Low noise: 3nV / √Hz, suitable for applications requiring high precision and low noise; wide bandwidth and high precision make it an ideal choice for applications requiring both AC and precision DC performance;

[0082] SN74LS04 is a six-channel inverter chip. Each inverter has a unique pin function identification to clearly distinguish input and output signals. It adopts the principle of transistor digital circuit and uses P-type and N-type transistors to generate reverse output. It also has the characteristics of fast response, high stability and easy integration.

[0083] The model of the wireless transmission module is USR-DR15X.

[0084] Specifically, USR-DR15X is a "lipstick DTU" launched by the Human Internet of Things, also known as an ultra-small rail-type DTU. This product has the characteristics of small size, integrated SIM card, Bluetooth configuration, and convenient installation of rails and hanging ears; Cat-1 series products have the characteristics of high speed, low latency, small size, and simple use. The product adopts industrial-grade design standards, supports wide voltage terminal power supply, supports FOTA remote self-upgrade and FTP other upgrade protocols. DR154 is the 485 version, and DR152 is the 232 version. A wireless terminal device used to convert serial port (such as 485 serial port) data into IP data or convert IP data into serial port data, and transmit it through a wireless communication network.

[0085] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A non-contact arrester leakage current and lightning strike number collection system, characterized in that: include: Lightning arresters installed on high-voltage equipment; The monitoring and acquisition system includes a microampere-level open-and-close high-precision leakage current transformer clamped on the arrester grounding wire, and a leakage current acquisition module and a lightning strike number acquisition module respectively connected to the microampere-level open-and-close high-precision leakage current transformer. The leakage current acquisition module is used to collect leakage current data measured by the microampere-level open-and-close high-precision leakage current transformer, and the lightning strike number acquisition module is used to obtain lightning strike waveform characteristics based on the leakage current data measured by the microampere-level open-and-close high-precision leakage current transformer to determine the occurrence of a lightning strike event and count the number of lightning strikes.

2. The non-contact arrester leakage current and lightning strike number acquisition system according to claim 1 is characterized in that: The leakage current acquisition module includes a leakage current collector, which is used to collect leakage current data measured by the microampere-level open-close high-precision leakage current transformer.

3. The non-contact arrester leakage current and lightning strike number acquisition system according to claim 2 is characterized in that: The lightning strike number acquisition module includes a first signal processing module, a second signal processing module and a high-speed voltage collector; The first signal processing module includes an integrator, an amplifier and a filter connected in sequence, and is used to pre-process the leakage current data; The second signal processing module includes a shaper, which is used to shape the pre-processed leakage current data to obtain a square wave signal; The high-speed voltage collector is used to collect the pulse waveform of the square wave signal and calculate the number of lightning strikes.

4. The non-contact arrester leakage current and lightning strike number acquisition system according to claim 3 is characterized in that: The leakage current collection module and the lightning strike number collection module are both connected to a power supply module; The power supply module is connected to the leakage current collector; The power supply modules are connected to the first signal processing module, the second signal processing module and the high-speed voltage collector.

5. The non-contact arrester leakage current and lightning strike number acquisition system according to claim 3 is characterized in that: Also includes a wireless transmission module; The wireless transmission module is connected to the leakage current collector and the high-speed voltage collector respectively, and the collected leakage current data and lightning waveform characteristics are wirelessly transmitted to the host computer via the wireless transmission module.

6. The non-contact arrester leakage current and lightning strike number collection system according to claim 3 is characterized in that: The first signal processing module is implemented by a first signal processing circuit; The first signal processing circuit includes a first integrator, a second integrator and a first amplifier, the first integrator is connected to the second pin of the first amplifier, a first resistor and a second resistor are connected in series between the first integrator and the first amplifier, the second integrator is connected to the third pin of the first amplifier, a first capacitor and a third resistor are connected between the first integrator and the first resistor and between the second integrator and the first amplifier, the first capacitor and the third resistor are connected in parallel, the fifth pin of the first amplifier is grounded through a fourth resistor, the sixth pin of the first amplifier is grounded through a fifth resistor, the seventh pin of the first amplifier is connected to the input end of the fifth resistor through a sixth resistor, the first pin of the first amplifier is connected to the input end of the fourth resistor through a second capacitor, the second resistor and the first amplifier and the first amplifier and the second capacitor are connected through a third capacitor, the second two terminals of the third capacitor are connected in parallel with a seventh resistor, and the fourth and eighth pins of the first amplifier are connected to the positive and negative electrodes of a power supply, respectively; An eighth resistor is connected between the first amplifier and the sixth resistor, one output end of the eighth resistor serves as a first output of the first amplifier, and the other output end of the eighth resistor is grounded via a fourth capacitor as a second output of the first amplifier.

7. The non-contact arrester leakage current and lightning strike number collection system according to claim 5, characterized in that: The second signal processing module is implemented by a second signal processing circuit; The second signal processing circuit includes a first connection terminal, a first operational amplifier, a first inverter, a second inverter and a second connection terminal; The second pin of the first wiring terminal is connected to the third end of the first operational amplifier through a ninth resistor, a tenth resistor, and an eleventh resistor in sequence, the second end of the first operational amplifier is grounded through a twelfth resistor, the sixth end of the first operational amplifier is connected to the first inverter, the first inverter is connected to the second inverter, the second inverter is connected to the first pin of the second wiring terminal, the second pin of the second wiring terminal is grounded, and a fifth capacitor is connected between the output end of the second inverter and the ground end of the second wiring terminal; The second pin of the first wiring terminal is connected to the ninth resistor via a thirteenth resistor and is grounded, the tenth resistor and the eleventh resistor are connected to the grounding end of the twelfth resistor via a fourteenth resistor, the first op amp and the twelfth resistor are connected as well as the first op amp and the first inverter via a fifteenth resistor, the seventh end and the fourth end of the first op amp are respectively connected to the positive and negative electrodes of a power supply, the end of the first op amp connected to the positive electrode of the power supply is grounded via a sixth capacitor, the end of the first op amp connected to the negative electrode of the power supply is connected to the ground via a seventh capacitor, the first pin of the second wiring terminal is connected to the high-speed voltage collector, and the high-speed voltage collector is connected to the wireless transmission module; The first output of the first amplifier is connected to the second pin of the first wiring terminal.

8. The non-contact arrester leakage current and lightning strike number collection system according to claim 6, characterized in that: The model of the first amplifier is OPA2188.

9. The non-contact arrester leakage current and lightning strike number collection system according to claim 7, characterized in that: The model of the first terminal and the second terminal is HEADER2; The model of the first operational amplifier is OPA277; The models of the first inverter and the second inverter are SN74LS04.

10. The non-contact arrester leakage current and lightning strike number collection system according to claim 5, characterized in that: The model of the wireless transmission module is USR-DR15X.

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