CN217639306U

CN217639306U - Lightning arrester on-line monitoring device

Info

Publication number: CN217639306U
Application number: CN202123279584.5U
Authority: CN
Inventors: 李瑞彬
Original assignee: NANJING DAONANENG TECHNOLOGY CO LTD
Current assignee: NANJING DAONANENG TECHNOLOGY CO LTD
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-10-21
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses an arrester on-line monitoring device, which comprises a plurality of groups of arrester monitoring sensors, arrester converging nodes, arrester communication nodes, a server and an arrester on-line monitoring platform; the lightning arrester monitoring sensor adopts a current transformer and a wireless synchronization technology and is used for acquiring the amplitude and the synchronous phase information of the leakage current of the lightning arrester; the lightning arrester convergence node is used for scheduling a plurality of groups of lightning arrester monitoring sensors in the whole station to work, collecting the data of the lightning arresters in the whole station, and processing and uploading the data to the lightning arrester communication node; the lightning arrester communication node is installed in a communication machine room in a station, and transfers data to a server through an intranet; the lightning arrester convergence node and the lightning arrester communication node are connected through a 2-core cable; and the lightning arrester online monitoring platform is connected with the server through a network and is used for checking the real-time data of the lightning arrester on site. The whole communication mode of the device adopts a 485 communication mode to realize real-time remote transmission of data through an internal local area network.

Description

Lightning arrester on-line monitoring device

Technical Field

The utility model mainly relates to a power equipment monitoring field, concretely relates to arrester on-line monitoring device.

Background

Metal Oxide Surge Arrester (abbreviated as MOA) is a main device for overvoltage protection of power systems due to its advantages of excellent nonlinear characteristics and large current capacity, and can effectively suppress operation overvoltage and atmospheric overvoltage in power systems.

The resistive current in the leakage current can effectively reflect the health condition of the lightning arrester, the resistive current is generally extracted from the sampled leakage current, and the size of the leakage current is influenced by environmental factors. Experiments prove that under the interference of various environmental factors, the amplitude of the leakage current is related to the temperature and the humidity. The prior art lacks a relevant method for considering the influence of environmental factors on the leakage current of the lightning arrester.

At present, the lightning arrester monitoring device monitors through a wired sensor, a large number of signal cables need to be laid, the field construction amount is large, and the field implementation is complex.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an arrester on-line monitoring device realizes the on-line monitoring of arrester, and arrester on-line monitoring platform is through the processing analysis to measured data, gives the aassessment diagnosis to the operating condition of arrester, provides the guarantee for the safe operation of arrester.

The utility model provides an arrester on-line monitoring device, which comprises a plurality of groups of arrester monitoring sensors, arrester converging nodes, arrester communication nodes, a server and an arrester on-line monitoring platform; the lightning arrester monitoring sensor adopts a current transformer and a wireless synchronization technology and is used for acquiring the amplitude and the synchronous phase information of the leakage current of the lightning arrester; the lightning arrester convergence node is used for scheduling a plurality of groups of lightning arrester monitoring sensors in the whole station to work, collecting the data of the lightning arresters in the whole station, and processing and uploading the data to the lightning arrester communication node; the lightning arrester communication node is installed in a communication machine room in a station, and transfers data to a server through an intranet; the lightning arrester convergence node and the lightning arrester communication node are connected through a 2-core cable; and the lightning arrester on-line monitoring platform is connected with the server network and is used for checking the real-time data of the field lightning arrester.

Compared with the prior art, the utility model discloses a show the advantage and do:

(1) The utility model discloses possess the function of measuring the environmental variable, can monitor the environmental humiture information when monitoring the arrester leakage current, can diagnose the operating condition of arrester through the data integration analysis of many parameters;

(2) The utility model provides a wireless monitoring mode aiming at the site where signal cables are not suitable to be laid, the monitoring sensor is wireless and non-humanized, a mode of combining a wireless Lora communication mode and 485 communication is adopted, the monitoring sensor is powered by a battery, a power cable is not needed, the electric quantity consumption is controlled by using an ultra-low power consumption working mode, and various site working condition conditions are met;

(3) The utility model discloses the on-line monitoring platform shows and has analyzed multiple data, including full current virtual value, thunderbolt number of times, hindering nature electric current growth rate, humiture etc. reduced operation personnel's work load.

Drawings

Fig. 1 is the utility model discloses arrester on-line monitoring device schematic structure.

Fig. 2 is the utility model discloses arrester monitoring sensor functional schematic diagram.

Fig. 3 is the utility model discloses the arrester assembles node function schematic diagram.

Fig. 4 is a schematic view of the communication function of the present invention.

Detailed Description

An arrester on-line monitoring device comprises a plurality of groups of arrester monitoring sensors, arrester convergence nodes, arrester communication nodes and an arrester on-line monitoring platform; the lightning arrester monitoring sensor adopts a high-precision current transformer and an advanced wireless synchronization technology to accurately acquire the amplitude and the synchronous phase information of the leakage current of the lightning arrester. Meanwhile, the increase rate of the resistive fundamental wave current of the lightning arrester is calculated by combining environmental parameters and adopting an intelligent algorithm. The lightning arrester convergence node is used for dispatching a plurality of groups of lightning arrester monitoring sensors in the whole station to work, collecting data of the lightning arresters in the whole station, processing the data and uploading the data to the lightning arrester communication node, and the lightning arrester communication node is installed in a communication machine room in the station and transfers the data to a background server through an internal network. Adopt 485 communications between arrester sink node and the arrester communication node, connect through a 2 core cable conductor. The lightning arrester on-line monitoring platform is used for checking real-time data of the on-site lightning arrester and knowing the running condition of the lightning arrester.

Further, each group of lightning arrester monitoring sensors comprises 3 lightning arrester monitoring sensors, and the 3 lightning arrester monitoring sensors are respectively connected to two ends of the three phases of the lightning arrester meter in parallel.

Further, a group of three lightning arrester monitoring sensors can realize self-synchronization, and a synchronization command is initiated by one phase. And each phase of lightning arrester control unit adopts a CC2530 chip. The CC2530 has a 2.4G communication radio frequency function, and can conveniently realize small-range wireless ad hoc network communication.

Furthermore, the communication among the three lightning arrester monitoring sensors is realized through a zigbee wireless communication protocol.

Furthermore, an LORA communication mode is adopted between the lightning arrester convergence node and the lightning arrester monitoring sensor, and the communication frequency is 470MHZ.

Furthermore, the lightning arrester convergent node can dispatch the work of a plurality of groups of lightning arrester monitoring sensors and has the function of measuring environmental variables.

Furthermore, the communication reliability is guaranteed by a 485 communication mode between the arrester convergence node and the arrester communication node and by 485 relay isolators at two ends.

The lightning arrester on-line monitoring device provided by the application has the functions of field measurement, analysis, data communication and the like, and has the parameters of measuring the amplitude, synchronous phase information, environmental variables and the like of the leakage current of the lightning arrester. And data real-time remote transmission is realized through an internal local area network in a 485 communication mode. And the monitoring device is matched with a remote device platform to comprehensively diagnose and analyze the measurement result of the monitoring device and monitor the operation condition of the field lightning arrester.

Parameters such as the amplitude, synchronous phase information and temperature and humidity of the leakage current of the lightning arrester are extracted, the increase rate of the resistive current of the lightning arrester is sorted and analyzed, and the operating condition of the lightning arrester is judged, analyzed and judged according to the value of the increase rate of the resistive current.

The present invention will be further described with reference to the following examples, but the present invention is not limited by the following examples.

Examples

As shown in fig. 1, an arrester on-line monitoring device includes an arrester monitoring sensor, an arrester convergence node, an arrester communication node, and an arrester on-line monitoring platform.

As shown in fig. 2, the lightning arrester monitoring sensor is composed of a power module, a signal conditioning circuit, an AD conversion circuit, a clock circuit, a data storage module, a LORA communication module, and a Zigbee communication circuit. The first power supply module, the AD conversion circuit, the clock circuit, the first data storage module, the first LORA communication module and the Zigbee communication circuit are all connected with the first main control unit; the signal conditioning circuit is connected with the AD conversion circuit, the power module is used for supplying power to the whole lightning arrester monitoring sensor, the signal conditioning circuit filters and amplifies leakage current signals, and the AD conversion circuit is used for sampling and processing current signals. The clock circuit is used for providing clock information of the sensor operation, and providing a time point and an operation time interval of each time the sensor starts to operate. The data storage module is used for storing various log information in the working process of the sensor, and comprises the following steps: a work log record code, sensor configuration, etc. The LORA communication module is used for communicating with the arrester convergence node; the Zigbee communication circuit is used for the mutual communication between three phases of a group of lightning arresters.

As shown in fig. 3, the arrester sink node is composed of a power module, a data storage unit, an environment variable acquisition module, a LORA communication module, and a main control unit. The power supply module is used for supplying power to the whole arrester sink node; the second power supply module, the second data storage module, the environment variable acquisition module and the second LORA communication module are all connected with a second main control unit, the second main control unit is connected with lightning arrester communication nodes, and the data storage unit is used for storing data information and temperature and humidity data of each phase of lightning arrester to be scheduled; the environment variable acquisition module is used for acquiring environment temperature and humidity data; the LORA communication module is used for communicating with each group of each phase lightning arrester; the main control unit is used for processing the work of the arrester convergent node and scheduling the operation of the arrester monitoring sensor.

Fig. 4 is a schematic diagram of the communication function of the device. The lightning arrester convergence node and the lightning arrester monitoring sensor are communicated through an LORA; and the lightning arrester monitoring sensors are communicated with each other through Zigbee. The lightning arrester convergent node can be communicated with a plurality of groups of lightning arrester monitoring sensors. And a 485 communication mode is adopted between the arrester convergence node and the arrester communication node. The whole device uses the three communication modes, and each communication mode has respective characteristics. LORA communication, the communication distance is far, the sensitivity is high, and the method is particularly suitable for long-distance communication. The Zigbee communication is a two-way wireless communication technology with short distance, low complexity, low power consumption, low speed and low cost. The method is mainly used for data transmission among various electronic devices with short distance, low power consumption and low transmission rate, and can conveniently realize small-range wireless ad hoc network communication. The communication mode and the characteristics are suitable for communication between the lightning arrester monitoring sensors. The 485 communication is a wired communication mode, and the 485 interface has good noise resistance, longer transmission distance and multi-station communication capability, is an optimal serial interface, and is very suitable for being used in a transformer substation.

Claims

1. An online lightning arrester monitoring device is characterized by comprising a plurality of groups of lightning arrester monitoring sensors, lightning arrester convergence nodes, lightning arrester communication nodes, a server and an online lightning arrester monitoring platform; the lightning arrester monitoring sensor adopts a current transformer and a wireless synchronization technology and is used for acquiring the amplitude and the synchronous phase information of the leakage current of the lightning arrester; the lightning arrester convergence node is used for scheduling a plurality of groups of lightning arrester monitoring sensors in the whole station to work, collecting the data of the lightning arresters in the whole station, and processing and uploading the data to the lightning arrester communication node; the lightning arrester communication node is arranged in a communication machine room in the station and transfers data to the server through an intranet; the lightning arrester convergence node and the lightning arrester communication node are connected through a 2-core cable; and the lightning arrester online monitoring platform is connected with the server network.

2. The on-line arrester monitoring device according to claim 1, wherein each set of the arrester monitoring sensors comprises 3 arrester monitoring sensors, and the 3 arrester monitoring sensors are respectively connected in parallel at two ends of three phases of the arrester meter.

3. An on-line arrester monitoring device according to claim 2, wherein the 3 arrester monitoring sensors are self-synchronizable, and the synchronization command is initiated by one of them; the lightning arrester monitoring sensor adopts a CC2530 chip.

4. An on-line monitoring device for lightning arrester according to claim 1, characterized in that the 3 lightning arrester monitoring sensors communicate with each other by zigbee wireless communication protocol.

5. The on-line monitoring device for the lightning arresters according to claim 1, wherein the lightning arrester convergence nodes and each group of lightning arrester monitoring sensors adopt a LORA communication mode, and the communication frequency is 470MHZ.

6. The on-line arrester monitoring device according to claim 1, wherein 485 communication is adopted between the arrester convergence node and the arrester communication node, and 485 relay isolators are added at both ends.

7. The online arrester monitoring device according to claim 1, wherein the arrester monitoring sensor is composed of a first power module, a signal conditioning circuit, an AD conversion circuit, a clock circuit, a first data storage module, a first LORA communication module, a Zigbee communication circuit, and a first main control unit; the first power supply module, the AD conversion circuit, the clock circuit, the first data storage module, the first LORA communication module and the Zigbee communication circuit are all connected with the first main control unit; the signal conditioning circuit is connected with the AD conversion circuit.

8. The online arrester monitoring device according to claim 1, wherein the arrester aggregation node comprises a second power module, a second data storage module, an environmental variable acquisition module, a second LORA communication module and a second main control unit; the second power module, the second data storage module, the environment variable acquisition module and the second LORA communication module are all connected with a second main control unit, and the second main control unit is connected with the lightning arrester communication node.