CN204269762U - A kind ofly adopt solar powered cable line fault intelligent online monitoring system - Google Patents

Abstract

The utility model discloses an intelligent on-line monitoring system for cable line faults powered by solar energy, which includes several fault detectors, a centralized processor, a communication switch and a monitoring system server, and a 2.4G wireless communication module is arranged inside the fault detector. The single-chip control unit, current sensor, and light alarm module, the centralized processor is powered by photovoltaic cell components, and connected to the monitoring system server through a communication switch, receives the sampling data of the ABC3 phase fault detector and performs preliminary calculation of fault information, and processes The analyzed data is sent to the communication switch, and the communication switch decodes the fault information and uploads it to the monitoring system server. The intelligent online fault monitoring system for cable lines powered by solar energy described in the utility model can comprehensively monitor the short circuit and ground faults on the line. , overload, disconnection, power failure, three-phase unbalance, stealing and other fault conditions, and quickly and accurately make fault judgments.

Description

An intelligent on-line monitoring system for cable line faults powered by solar energy

technical field

The utility model relates to an intelligent on-line monitoring system for cable line faults powered by solar energy, which belongs to the technical field of line detection.

Background technique

In power distribution lines, due to reasons such as long lines, long branches, and complex structures, when faults such as short circuit, disconnection, power outage, three-phase imbalance, and overload occur, the fault point and cause of the fault cannot be detected in time. Then prolong the maintenance time, cause a large-scale power outage, and cause greater economic losses. At present, although fault detectors are also installed in cable lines, there are still several disadvantages:

1. The fault detector adopts differential and integral analog circuits, which are not sensitive to small current signals;

2. There is single-phase communication between the fault detector and the centralized processor. The monitoring center cannot remotely modify the detection parameters of the fault detector, and cannot eliminate the malfunction caused by the inrush current of the reclosing non-fault branch and the feedback power transmission. As long as there is a malfunction ( Refuse to move) then move forever by mistake;

3. The fault detector can only collect and send current information, but cannot send out an alarm signal;

4. The centralized processor connected to the fault detector is generally powered by a battery and needs to be replaced regularly.

In view of this, the inventor researched this and specially developed a kind of intelligent on-line monitoring system for cable line faults powered by solar energy, and this case arose from this.

Utility model content

The purpose of this utility model is to provide an intelligent online monitoring system for cable line faults powered by solar energy, which can comprehensively monitor fault conditions such as short circuit, grounding, overload, disconnection, power failure, three-phase imbalance, and theft on the line. And quickly and accurately make fault judgments, and send corresponding alarm information.

In order to achieve the above object, the solution of the present utility model is:

An intelligent online monitoring system for cable line faults powered by solar energy, including several fault detectors, a centralized processor, a communication switch and a monitoring system server, the fault detectors are respectively installed on the three-phase wires of the cable line to form a Phase fault detectors, B phase fault detectors and C phase fault detectors, a group of fault detectors are installed every 1.5-2km on the same cable line, the fault detectors are equipped with 2.4G wireless communication modules and centralized processors There is also a corresponding 2.4G wireless communication module, and the wireless two-way radio frequency short-distance communication is performed between the fault detector and the centralized processor through the 2.4G wireless communication module, which has the characteristics of strong anti-interference ability and fast data transmission rate; the fault The detector is equipped with a single-chip microcomputer control unit, as well as a current sensor and a light alarm module connected to the single-chip microcomputer control unit. It collects 12 points of each cycle in real time for Fourier current calculation, accurately obtains the real-time online current value of the current line, and can capture real-time Current mutation information less than one cycle (20ms); the centralized processor is connected to the monitoring system server through a communication switch, the centralized processor is installed on the cable tower pole, and the internal storage battery is connected to the photovoltaic cell assembly. The processor continues to supply power, and the centralized processor receives the sampling data of the ABC3-phase fault detector and performs preliminary calculation of the fault information, and sends the processed and analyzed data to the communication switch, and the communication switch decodes the fault information and uploads it to the monitoring system server. After the system server comprehensively analyzes the line faults of each installed node, on the one hand, it displays the specific lines and specific fault points of the fault, and on the other hand, it controls the light alarm module of the fault detector corresponding to the fault point to send out an alarm signal.

Preferably, the centralized processor communicates with the communication switch through the GSM mobile communication module.

Preferably, the current sensor of the fault detector adopts a high magnetic permeability electromagnetic induction current sensor.

Preferably, the single-chip microcomputer control unit of the fault detector adopts an AT89 series single-chip chip.

As a preference, the 2.4G wireless communication module of the fault detector and the centralized processor adopts the nRF24L01 chip.

As a preference, the light alarm module of the fault detector is a red LED light. When a line fault occurs, the monitoring system server controls the light alarm module of the fault detector corresponding to the fault point to send an alarm signal to remind the maintenance personnel in time to handle the fault. .

The working principle of the above-mentioned intelligent online monitoring system for cable line faults powered by solar energy: three fault detectors collect three-phase current information in real time, and transmit the collected current information to the centralized processor through the 2.4G wireless communication module for centralized processing According to the current information sent by the three fault detectors, the specific fault can be judged, and the fault information will be sent back to the communication switch through the GSM mobile communication module, and the communication switch will decode the fault information and upload it to the monitoring system server, and the monitoring system server will After a comprehensive analysis of the line faults of each installation node, the specific fault line and specific fault point are displayed, and the line fault point and fault type are sent to the mobile phone of the relevant responsible person through GSM SMS, and the relevant responsible person performs troubleshooting. , the monitoring system server also controls the light alarm module of the fault detector corresponding to the fault point to send an alarm signal through the communication switch and the centralized processor, and promptly reminds the maintenance personnel to handle the fault.

Compared with the prior art, the above-mentioned intelligent on-line monitoring system for cable line faults powered by solar energy has the following advantages:

1) Break through the traditional general fault detector technology principle and the traditional FTU standard, no need for PT and CT, no need for switch or switch modification, equipotential and non-power-off installation, wide application range, high input-output ratio, reliable operation, and comprehensive performance Monitor fault conditions such as short circuit, grounding, overload, disconnection, power failure, three-phase unbalance, stealing and cutting on the line, and help operators quickly find fault points to avoid further expansion of accidents;

2) The centralized processor continuously supplies power through photovoltaic cell components, on the one hand, it ensures the reliability of power supply, on the other hand, it uses solar energy, which is clean and environmentally friendly;

3) Comprehensive monitoring of line faults is carried out by means of real-time online current collection by fault detectors, making fault judgments more timely and accurate;

4) Local communication adopts two-way short-distance wireless frequency modulation communication, remote communication adopts GSM network communication, local and remote maintenance is convenient, and fault detection parameters such as short circuit, grounding and open circuit can be adjusted online, which greatly improves the accuracy of short circuit fault detection;

5) The light alarm module is directly installed on the fault detector, and when a fault occurs, it can prompt the staff in time to shorten the maintenance time.

The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a block diagram of a module of an intelligent on-line monitoring system for cable line faults powered by solar energy in accordance with the present embodiment;

Fig. 2 is the fault detector single-chip microcomputer control unit circuit schematic diagram of the present embodiment;

FIG. 3 is a circuit diagram of the 2.4G wireless communication module of this embodiment.

Detailed ways

As shown in Fig. 1, a kind of intelligent on-line monitoring system of cable line fault that adopts solar energy power supply comprises several fault detectors 1, centralized processor 2, communication exchange 3 and monitoring system server 4, and described fault detector 1 installs respectively On the three-phase wires of the cable line, a phase A fault detector, a B phase fault detector and a C phase fault detector are formed, and a group of fault detectors are installed every 1.5-2km on the same cable line. A current sensor 11, a single-chip microcomputer control unit 12, a 2.4G wireless communication module 13 and a light alarm module 14 connected in sequence are provided, wherein the current sensor 11 adopts an electromagnetic induction current sensor of high magnetic permeability material, and the fault detector 1 collects each Do Fourier current calculation at 12 o'clock of each cycle, accurately obtain the real-time online current value of the current line, and can capture the current mutation information less than one cycle (20ms) in real time. The centralized processor 2 is also provided with a corresponding 2.4G wireless communication module, and the fault detector 1 and the centralized processor 2 carry out wireless two-way radio frequency short-distance communication through the 2.4G wireless communication module, which has strong anti-interference ability and high data transmission efficiency. Rate blocks and more. The light alarm module 14 of the fault detector 1 is a red LED light.

The centralized processor 2 is connected to the monitoring system server 4 through the communication switch 3, the centralized processor 2 is installed on the cable pylon, and the internal storage battery is connected with the photovoltaic cell assembly 21, and the centralized processor 2 is continuously powered by the photovoltaic cell assembly 21 , the centralized processor 2 communicates with the communication switch 3 through the GSM mobile communication module, receives the sampling data of the ABC3 phase fault detector 1 and performs preliminary calculation of the fault information, and sends the processed and analyzed data to the communication switch 3, and the communication switch 3 Decode the fault information and upload it to the monitoring system server.

As shown in FIG. 2 , the single-chip microcomputer control unit 12 of the fault detector 1 adopts a single-chip chip of the AT89 series, and this embodiment adopts a single-chip microcomputer whose model is AT89LS5X. The single-chip microcomputer control unit 12 is used for processing the data collected by the current sensor 11 for calculation, and at the same time drives the light alarm module 14 to send out alarm information.

As shown in Figure 3, the 2.4G wireless communication module 13 of described fault detector 1 adopts the model as nRF24L01 chip, and nRF24L01 is a single-chip wireless transceiver chip working in the ISM frequency band of 2.4GHz～2.5GHz. It can be directly connected to the microcontroller, and the relevant interface signals are described as follows:

CSN: SPI chip select signal;

MOSI: input from SPI data;

MISO: output from SPI data;

SCK: SPI clock signal;

IRQ: interrupt request signal;

CE: Receive (RX)/Transmit (TX) mode selection.

The working principle of an intelligent online monitoring system for cable line faults powered by solar energy described in the utility model: three fault detectors 1 collect three-phase current information in real time, and transmit the collected current information through a 2.4G wireless communication module 13 To the centralized processor 2, the centralized processor 2 judges the specific fault according to the current information sent by the three fault detectors 1, and sends the fault information back to the communication switch 3 through the GSM mobile communication module, and the communication switch 3 transmits the fault information After decoding, it is uploaded to the monitoring system server 4, and after the comprehensive analysis of the line faults of each installed node, the monitoring system server 4 shows the specific lines and specific fault points of the fault, and sends the fault point and fault type of the line to the The relevant responsible person's mobile phone 5, and the relevant responsible person will perform troubleshooting. At the same time, the monitoring system server 4 also controls the light alarm module 14 of the fault detector 1 corresponding to the fault point to send an alarm signal through the communication switch 3 and the centralized processor 2, and promptly reminds the maintenance personnel to handle the fault.

The above-mentioned embodiments and drawings do not limit the product form and style of the present utility model, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present utility model.

Claims (6)

1. one kind adopts solar powered cable line fault intelligent online monitoring system, it is characterized in that: comprise several fault detectors, focus on device, communication switchboard and supervisory system server, described fault detector is arranged on the three-phase conducting wire of cable line respectively, form A phase fault detecting device, B phase fault detecting device and C phase fault detecting device, same cable circuit installs one group of fault detector every 1.5-2km, 2.4G wireless communication module is provided with in described fault detector, focus on device and be also provided with corresponding 2.4G wireless communication module, fault detector and focus between device and carry out wireless two-way radio frequency short haul connection by 2.4G wireless communication module, described fault detector is provided with single chip control unit further, and the current sensor be connected with single chip control unit and light warning module, the described device that focuses on is connected with supervisory system server by communication switchboard, focusing on device is arranged on pylon bar, internal battery is connected with photovoltaic cell component, powered for focusing on device by photovoltaic cell component, focus on device receive the sampled data of ABC three-phase fault detecting device and carry out failure message primary Calculation, and the data after Treatment Analysis are sent to communication switchboard, communication switchboard is uploaded to supervisory system server after being decoded by failure message.

2. a kind ofly adopt solar powered cable line fault intelligent online monitoring system as claimed in claim 1, it is characterized in that: described in focus on device and communicated with communication switchboard by GSM mobile communication module.

3. a kind ofly adopt solar powered cable line fault intelligent online monitoring system as claimed in claim 1, it is characterized in that: the current sensor of described fault detector adopts high magnetic conduction em induced current sensor.

4. a kind ofly adopt solar powered cable line fault intelligent online monitoring system as claimed in claim 1, it is characterized in that: the single chip control unit of described fault detector adopts the monolithic chip of AT89 series.

5. a kind ofly adopt solar powered cable line fault intelligent online monitoring system as claimed in claim 1, it is characterized in that: described fault detector and the 2.4G wireless communication module focusing on device adopt model to be nRF24L01 chip.

6. a kind ofly adopt solar powered cable line fault intelligent online monitoring system as claimed in claim 1, it is characterized in that: the light warning module of described fault detector adopts red LED lamp.