阅读说明：本技术 一种电力电缆故障检测方法 (Power cable fault detection method ) 是由 李制林 于 2018-06-12 设计创作，主要内容包括：本发明公开了一种电力电缆故障检测方法,通过安装在高压线路上的检测机构和低压线路上的检测机构实时采集线路数据并经数据采集装置发给远程监控中心,由远程监控中心进行分析处理,可以及时发现线路故障,便于检修处理,提高了检修效率,保证了人身安全；通过在变压器进线和出线同时安装的检测机构,可以快速地检测出来变压器的转换效率,及时更换老化及故障变压器,避免电能的浪费,达到节能减排的目的。(The invention discloses a power cable fault detection method, which comprises the steps that line data are collected in real time through a detection mechanism arranged on a high-voltage line and a detection mechanism arranged on a low-voltage line and are sent to a remote monitoring center through a data collection device, and the remote monitoring center carries out analysis processing, so that line faults can be found in time, the maintenance processing is convenient, the maintenance efficiency is improved, and the personal safety is ensured; through the detection mechanism which is simultaneously installed on the incoming line and the outgoing line of the transformer, the conversion efficiency of the transformer can be quickly detected, the aging and fault transformers can be replaced in time, the waste of electric energy is avoided, and the purposes of energy conservation and emission reduction are achieved.)

1. A power cable fault detection method, comprising:

(1) installing a detection device: meanwhile, a plurality of detection devices and data acquisition devices connected with the detection mechanisms are distributed and mounted on the power cable on the high-voltage side of the transformer and the power cable on the low-voltage side of the transformer;

(2) setting a data acquisition device, registering the ID of the installed detection mechanism in the data acquisition device, establishing connection with a remote monitoring center, and performing registration operation;

(3) setting a remote monitoring center, inputting user information, ID (identity) of a data acquisition device, and ID information of a detection mechanism connected to the data acquisition device; the remote monitoring center is formed by connecting a data processing server, a database server and an operation terminal through a network;

(4) after the device is started, the data acquisition device sends detection data to the remote monitoring center to realize a monitoring function.

2. The method for detecting the fault of the power cable according to claim 1, wherein the detection mechanism comprises a Hall sensor, a signal conditioning circuit, an A/D conversion circuit, a microprocessor and a communication interface which are connected in sequence.

3. A power cable fault detection method as claimed in claim 1, wherein the detection mechanism transmits encrypted data to a data acquisition device.

Technical Field

The invention relates to the technical field of power transmission, in particular to a power cable fault detection method.

Background

After the power cable is installed and used, cable faults sometimes occur, so that normal power supply cannot be carried out. Since the power cables are installed together in a group, when a power cable fails, the failed power cable needs to be found out from the group of power cables for processing. At present, adopt power cable fault detection appearance to detect power cable's fault point usually, however, when using fault detection appearance to detect, need the maintainer to hold fault detection appearance along the line and detect, not only waste time and energy, the condition of detection error can appear often moreover, can take place the accident of personal danger even.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a power cable fault detection method which is accurate in detection, high in efficiency and convenient to use.

The invention is realized by the following technical scheme:

a power cable fault detection method, comprising:

(1) installing a detection device: meanwhile, a plurality of detection devices and data acquisition devices connected with the detection mechanisms are distributed and mounted on the power cable on the high-voltage side of the transformer and the power cable on the low-voltage side of the transformer;

(2) setting a data acquisition device, registering the ID of the installed detection mechanism in the data acquisition device, establishing connection with a remote monitoring center, and performing registration operation;

(3) setting a remote monitoring center, inputting user information, ID (identity) of a data acquisition device, and ID information of a detection mechanism connected to the data acquisition device;

(4) after the device is started, the data acquisition device sends detection data to the remote monitoring center to realize a monitoring function.

Specifically, the detection mechanism comprises a Hall sensor, a signal conditioning circuit, an A/D conversion circuit, a microprocessor and a communication interface which are connected in sequence.

Specifically, the detection mechanism sends the encrypted data to the data acquisition device.

The invention has the following advantages and beneficial effects:

1. the invention collects the line data in real time through the detection mechanism arranged on the high-voltage line and the detection mechanism arranged on the low-voltage line and sends the line data to the remote monitoring center through the data collection device, and the remote monitoring center carries out analysis and processing, thereby being capable of finding line faults in time, being convenient for maintenance and processing, improving the maintenance efficiency and ensuring the personal safety.

2. The invention can rapidly detect the conversion efficiency of the transformer through the detection mechanisms arranged on the two sides of the transformer, is convenient for replacing aged and fault transformers in time, avoids the waste of electric energy, achieves the purposes of energy conservation and emission reduction, and also plays a role in preventing cable faults.

3. The invention adopts a digital detection mechanism, and realizes complete electrical isolation of a detection node from the outside after the Hall sensor and a short-distance wireless network or an optical fiber are used for communicating with data acquisition and transmission equipment, thereby ensuring the safety of system operation.

4. The invention adopts a plurality of communication modes to realize data transmission and transmission, ensures the accuracy and reliability of data, provides a reliable data source for data analysis and improves the accuracy and stability of fault detection.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.

The utility model provides a power cable fault detection device, includes a plurality of detection mechanism of distribution installation on power cable between high-voltage line and transformer, a plurality of detection mechanism of installation on power cable between transformer and consumer electric equipment, the data acquisition device and the remote monitoring center that are connected with each detection mechanism. The detection mechanism can be connected with the data acquisition device in a short-distance wireless network, RS485 serial bus mode or an optical fiber mode, and the data acquisition device is connected with the remote monitoring center through a 3G network, a LAN network or an optical fiber network. The following describes each part of the system:

the detection mechanism comprises a Hall sensor, a signal conditioning circuit, an analog-to-digital conversion circuit, a microprocessor and an external communication interface which are sequentially connected. The Hall sensor can convert the magnetic field intensity generated when current passes through the cable into a corresponding voltage signal or current signal and output the voltage signal or current signal to the signal conditioning circuit; the signal conditioning circuit can carry out filtering, amplitude limiting, amplification, normalization and other processing on the signals collected by the Hall sensor and then sends the signals to the analog-to-digital conversion circuit; the analog-to-digital conversion circuit can convert the analog signal of the front stage circuit into a digital signal and send the digital signal to the microprocessor; the microprocessor encrypts a voltage signal or a current signal of the received digital signal and then sends the encrypted voltage signal or current signal to an external communication interface; the external communication interface can send the encrypted data to the data acquisition device through interface modules such as a short-distance wireless network, an RS-485 serial bus or optical fiber communication.

The data acquisition device comprises a microprocessor, and a liquid crystal display screen, an external communication interface, a sound alarm and a network communication interface which are connected with the microprocessor. The external communication interface adopts interface modules such as a short-distance wireless network, an RS-485 serial bus or optical fiber communication and the like and is used for receiving data sent by the detection device; the microprocessor can carry out primary processing on the data collected from the detection device, encrypt the data and send the encrypted data to the network communication interface, and receive the data of the remote data center and send the data to the liquid crystal display screen for displaying; the network communication interface can complete the communication work between the data acquisition and transmission device and the remote monitoring center, and can adopt a 3G wireless network, a LAN network, an optical fiber network and the like; the liquid crystal display screen can display information sent from the remote data center; the sound alarm is used for sending out sound prompt when a fault is found. The data acquisition device can be connected with a plurality of detection mechanisms to receive and collect data of each detection node, perform preliminary analysis on the received data, for example, detect the validity of the data (whether the data is the detection point ID registered during installation), and finally package, compress and encrypt the data of each detection node and send the data to a remote monitoring center through a network interface.

The remote monitoring center is formed by connecting a data processing server, a database server and an operation terminal through a network. The data processing server receives the data transmitted by the data acquisition and transmission device, decrypts and decompresses the received data, stores the data into the database server, can detect whether the data are normal or not at regular time, and gives an alarm to prompt when the data are abnormal to wait for an operator to process the data. The operation terminal can access the database server through the network, and monitoring personnel can check the data through the operation terminal to generate a data report.

The remote monitoring center analyzes the received data to realize the monitoring function of the power grid condition. By installing detection devices on the power cables on two sides of the transformer in a segmented manner, the problems of undervoltage, overvoltage, overcurrent and the like can be found in time by monitoring parameters such as voltage, current, interphase balance and the like in real time, and the device can be quickly positioned in a certain section of power grid after the power grid fails, so that the efficiency is improved for removing the failure; alarm points may also be set, such as when the voltage is above or below a threshold. Meanwhile, the detection device which is simultaneously arranged on the incoming line and the outgoing line of the transformer can quickly detect the conversion efficiency of the transformer, timely replace the aging and fault transformer, avoid the waste of electric energy and achieve the purposes of energy conservation and emission reduction.

The specific installation and use method of the power cable fault detection device comprises the following steps:

(1) selecting the installation position of the detection node: a plurality of detection nodes can be simultaneously arranged on the power cable at the high-voltage side of the transformer and the power cable at the low-voltage side of the transformer;

(2) setting a data acquisition device, registering the ID of the installed detection node into the equipment, establishing connection with a remote monitoring center, and performing operations such as registration and the like;

(3) setting a remote monitoring center, and inputting information such as user information, ID of a data acquisition device, ID of a detection node connected to the equipment and the like;

(4) after the device is started, the data acquisition device sends detection data to the remote monitoring center to realize the monitoring function.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.