CN112684310B - Comprehensive online intelligent monitoring system for high-voltage cable - Google Patents
Comprehensive online intelligent monitoring system for high-voltage cable Download PDFInfo
- Publication number
- CN112684310B CN112684310B CN202110072102.4A CN202110072102A CN112684310B CN 112684310 B CN112684310 B CN 112684310B CN 202110072102 A CN202110072102 A CN 202110072102A CN 112684310 B CN112684310 B CN 112684310B
- Authority
- CN
- China
- Prior art keywords
- monitoring
- acquisition unit
- partial discharge
- cable
- voltage cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Alarm Systems (AREA)
Abstract
The invention provides a comprehensive online intelligent monitoring system for a high-voltage cable, which comprises a field acquisition unit group, a remote monitoring host and a system communication background. The field acquisition unit group comprises a partial discharge acquisition unit, a circulation acquisition unit, a vibration acquisition unit, an environment acquisition unit and a video acquisition unit; the partial discharge acquisition unit comprises a first ultraviolet detection unit, a second ultrasonic detection unit, an edge data processing unit and a partial discharge online monitoring assembly; the edge data processing unit acquires an ultraviolet light signal acquired by the first ultraviolet light monitoring unit and an ultrasonic signal acquired by the second ultrasonic detection unit to obtain a partial discharge identification result and an intelligent monitoring result of the high-voltage cable in the current time section. And if the partial discharge identification result meets a preset condition, activating the partial discharge online monitoring assembly. According to the invention, a cable full-period management and control strategy is established, and the accuracy of early warning of faults is effectively improved.
Description
Technical Field
The invention belongs to the technical field of cable safety, and particularly relates to a comprehensive online intelligent monitoring system for a high-voltage cable.
Background
With the rapid development of power systems, the application range of high voltage cables in power systems is gradually expanding. Most of cable lines are built underground, so that the city is beautified, and the occupied area of a power transmission corridor is saved. The transformation of urban power grids and the replacement of traditional overhead lines by cable lines are inevitable trends. In major areas of large cities such as Beijing and Shanghai, the overhead line is basically replaced by a high-voltage cable line, and becomes the first choice of a power grid in the core area of the city. According to statistics, the Beijing city has more than 8000 kilometers of power supply lines and more than 18000 kilometers of cables. The operation condition of the cable has important significance for guaranteeing safe and reliable operation of the power grid.
The basic structure of the high-voltage cable mainly comprises four parts, namely a fiber core, an insulating layer, a shielding layer and a protective layer. In these four parts, the core is the carrier of the current propagation in the high voltage cable and is an important component of the high voltage cable. The insulating layer plays a role in isolating the wire core from the outside, and the shielding layer is divided into a conductor shielding layer and an insulating shielding layer and mainly exists in a high-voltage cable with the power of more than 15 kilowatts. The protective layer is used for protecting the high-voltage cable so as to prevent impurities outside the cable and moisture in the environment from permeating and prevent the cable from being damaged by external force. When partial discharges occur frequently in the high-voltage cable, the accessory insulation of the high-voltage cable is finally broken down. Because the internal insulation defect of the cable is difficult to find in time, if corresponding measures are not taken in time, the insulation deterioration is in malignant spread, and the insulation breakdown of the cable is caused in the past, so that the safe operation is seriously threatened.
At present, most of domestic main cables are still managed in a planned maintenance stage, and regular tests and maintenance not only increase operation and maintenance cost, but also cannot timely troubleshoot cable insulation defects and potential fault hidden dangers. The running state and performance online monitoring of the ultrahigh voltage cable is an important way for guaranteeing the safety and reliability of the cable, no clear specification and standard exists at home and abroad for direct reference, although enterprises and power supply units begin to perform related research and exploration on online monitoring of the running state of the cable at home, the monitoring system is single in function and mostly limited in the aspects of environment monitoring, anti-theft monitoring and the like in tunnels, and the construction of comprehensive online monitoring platforms for the state of the cable such as ultrahigh voltage power cable metal sheath grounding current, cable joint temperature, cable internal partial discharge monitoring, fault location and the like is unprecedented.
The chinese patent application CN202011027621.0 proposes a method for monitoring the environmental status of a cable trench, which comprises the following steps: 1) preparing a cable trench environment state monitoring system which comprises a remote monitoring platform, a concentrator and a wireless water immersion and temperature and smoke sensing monitoring device; a plurality of wireless water immersion and temperature and smoke sensing monitoring devices are arranged on the same cable trench, all the wireless water immersion and temperature and smoke sensing monitoring devices on the same cable trench are in wireless communication connection with a concentrator, and all the concentrators are in wireless communication connection with a remote monitoring platform; the wireless water immersion and temperature sensing smoke monitoring device comprises a water immersion sensor, a smoke sensor, a temperature and humidity sensor, a controller, a wireless communication module and a power supply module; 2) the sensor monitors the environmental state of the cable trench in real time, and once an abnormal phenomenon is monitored, an alarm signal is generated and sent to the remote monitoring platform, and the remote monitoring platform actively pushes alarm information to each monitoring maintenance personnel in real time. The method improves the reliability and safety of power transmission.
However, the inventor finds that, on one hand, the traditional cable monitoring system has little monitoring data information, for example, only using smoke detection equipment, pyroelectric ion detection equipment, video equipment and the like, which causes inaccurate early judgment and early warning of cable fire, and on the other hand, the monitoring data of partial discharge, circulation, load and the like of the cable body is not integrated with the cable service environment data, which cannot comprehensively early warn the origin of the cable fire. Meanwhile, the monitoring system of the cable does not link all monitoring data with the control signals of the fire-fighting device, and the automation and intelligence degrees are low. Therefore, the fire often can be alarmed after a certain period, the best processing opportunity is missed, and a large amount of fire early warnings are inaccurate, so that irreparable loss or unnecessary loss of people and properties is caused to a power system; in addition, the prior art solutions have many drawbacks in terms of data transmission and power consumption, for example, many devices need to be operated at any time, and there is a great power consumption.
Disclosure of Invention
In order to solve the technical problem, the invention provides a comprehensive online intelligent monitoring system for a high-voltage cable, which comprises a field acquisition unit group, a remote monitoring host and a system communication background. The field acquisition unit group comprises a partial discharge acquisition unit, a circulation acquisition unit, a vibration acquisition unit, an environment acquisition unit and a video acquisition unit; the partial discharge acquisition unit comprises a first ultraviolet detection unit, a second ultrasonic detection unit, an edge data processing unit and a partial discharge online monitoring assembly; the edge data processing unit acquires an ultraviolet light signal acquired by the first ultraviolet light monitoring unit and an ultrasonic signal acquired by the second ultrasonic detection unit to obtain a partial discharge identification result and an intelligent monitoring result of the high-voltage cable in the current time section. And if the partial discharge identification result meets a preset condition, activating the partial discharge online monitoring assembly.
Specifically, the monitoring system provided by the invention comprises a field acquisition unit group, a remote monitoring host and a system communication background, wherein the field acquisition unit group comprises a partial discharge acquisition unit, a circulation acquisition unit, a vibration acquisition unit, an environment acquisition unit and a video acquisition unit;
the circulating current acquisition unit is used for monitoring the grounding current of the cable sheath and transmitting monitoring data to the grounding current acquisition master station in real time;
the vibration acquisition unit is used for detecting an external broken signal of the environment where the high-voltage cable is located;
the environment acquisition unit comprises a microclimate monitoring sensor, a water level sensor and a well lid monitoring sensor;
the video acquisition unit comprises an image acquisition unit and an intrusion target discrimination engine;
by way of general introduction, an important improvement of the present invention resides in: the partial discharge acquisition unit comprises a first ultraviolet detection unit and a second ultrasonic detection unit;
the first ultraviolet detection unit acquires ultraviolet signals in a preset range of the high-voltage cable according to a first sampling period;
the second ultrasonic detection unit detects ultrasonic signals in the preset range of the high-voltage cable according to a second sampling period;
the partial discharge acquisition unit also comprises an edge data processing unit;
the edge data processing unit is connected with the first ultraviolet detection unit and the second ultrasonic detection unit;
said second sampling period lags said first sampling period and one of said second sampling period constitute a continuous time segment;
in a time section formed by a first sampling period and a second sampling period which are continuous in time, the edge data processing unit acquires the ultraviolet light signal acquired by the first ultraviolet light monitoring unit and the ultrasonic signal acquired by the second ultrasonic detection unit;
obviously, the above process is cyclic sampling.
The edge data processing unit obtains a partial discharge identification result based on the ultraviolet light signal and the ultrasonic wave signal;
and obtaining an intelligent monitoring result of the high-voltage cable in the current time section based on the partial discharge identification result and the monitoring result of the environment acquisition unit.
Yet another important improvement in this aspect is: the partial discharge acquisition unit also comprises a partial discharge online monitoring component;
and if the partial discharge identification result obtained by the edge data processing unit indicates that partial discharge exists in the preset range of the high-voltage cable, activating the partial discharge online monitoring component.
Further, the monitoring system is in communication with the tunnel ventilation system and the fire protection system;
and when the first target parameter monitored by the microclimate monitoring sensor meets a first preset condition, automatically starting the tunnel ventilation system and/or the fire fighting system.
The monitoring system is communicated with the on-site linkage water pump;
and when a second target parameter monitored by the water level sensor meets a second preset condition, starting the site linkage water pump.
The comprehensive online intelligent monitoring system for the high-voltage cable, provided by the invention, combines the technologies of the Internet of things and an intelligent sensor to realize partial discharge, circulation and temperature monitoring of a cable body and monitoring of videos, harmful gases, temperature and humidity and the like of a tunnel environment, and control signals of a fire-fighting system, a water pump system, a fan system and the like can be seamlessly fused to form the holographic sensing capability of the cable; the intelligent linkage is realized by combining an artificial intelligence method, a cable full-period management and control strategy is established, the accuracy of early warning of faults is effectively improved, precious time is saved for processing the hidden faults, and the operation safety of a power grid is guaranteed.
Further advantages of the invention will be apparent in the detailed description section in conjunction with the drawings attached hereto.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an integrated online intelligent monitoring system for high-voltage cables according to an embodiment of the present invention
FIG. 2 is a schematic diagram of data communication between field acquisition unit sets in the system of FIG. 1
FIG. 3 is a schematic diagram of a partial discharge acquisition unit in the system of FIG. 1
FIG. 4 is a schematic diagram of sampling of different sampling periods of the partial discharge acquisition unit in the system of FIG. 1
Fig. 5 is a schematic diagram of a connection of a partial discharge acquisition host used by the partial discharge acquisition unit in the system of fig. 1
FIG. 6 is a schematic diagram of the connections of the circulation collection hosts used by the circulation collection units in the system of FIG. 1
FIG. 7 is a schematic diagram of the connection of an environment acquisition host used by the environment acquisition unit in the system of FIG. 1
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
First, technical terms that different embodiments of the present invention may relate to are introduced:
1) the cable body refers to a cable segment portion excluding accessories such as a cable joint and a terminal.
2) Cable accessories such as cable access terminals, cable connectors and other cable circuit components are collectively called.
3) The cable joint is a device for connecting the cable with the conductor, the insulation, the shielding layer and the protective layer of the cable so as to make the cable line continuous.
4) Partial Discharge refers to Discharge that occurs between electrodes but does not penetrate the electrodes, and is a phenomenon of repeated breakdown and quenching under the action of high electric field strength due to weak points inside the insulation of equipment or defects caused during production.
Continuing with the background technology, the power cable is used as an important channel for the operation of the power grid, and plays a great role in the safe operation of the power grid. In recent years, with the continuous replacement of primary and secondary transformation equipment, the equipment level of power grid equipment is continuously improved, and the problem of cable fire prevention is highlighted, especially for old substations and old lines. According to eighteen requirements of national grid companies and the actual conditions of transformer substations and cable channels, the cable fire prevention treatment work is particularly important.
The cable plays an important role in the operation of the whole power grid, the number of the cables in a transformer substation is large, the cables are distributed all over the power station, underground cables are complicated in power transmission lines, and in a cable channel, because the cables in the cable channel are criss-cross along the cable channel, a tunnel and a vertical shaft, the distance is long, the road surface is narrow, the lighting condition is poor, and cable fire is easily caused if the cable channel is improperly designed and laid, operates under overload for a long time, suffers from chemical corrosion, is not in place in management and the like. Once a fire disaster happens, a large amount of toxic gas and smoke can be generated, the toxic gas and smoke can be quickly filled in the channel space, the visibility is low, although the smoke can be discharged by using a smoke exhauster after the fire occurs, the toxic smoke is difficult to be discharged in time, meanwhile, the temperature of the channel can reach 600-800 ℃ when the channel is violently burnt by a big fire, the cable support is burnt, and the cable core is burnt into a bead shape. Because the channel in the channel is narrow, gas generated by cable combustion is combined with water to form strong acid mist to be attached to an electrical device, so that not only can electrical equipment be damaged, but also related electrical equipment can be short-circuited to cause 'secondary disaster', the life safety of fire extinguishers can be directly threatened, and the fire extinguishers can be easily poisoned to cause casualty accidents. The cable is on fire, so that a large number of valuable cables are directly burnt, the control loop is easy to malfunction due to secondary disasters, other electrical equipment devices are damaged, other devices are caused to burn and explode, the operation recovery time is long, the difficulty is high, the consequences are more serious, the loss is larger, and the safe and stable operation of the equipment is seriously influenced.
At present, most of domestic main cables are still managed in a planned maintenance stage, and regular tests and maintenance not only increase operation and maintenance cost, but also cannot timely troubleshoot cable insulation defects and potential fault hidden dangers. The running state and performance online monitoring of the ultrahigh voltage cable is an important way for guaranteeing the safety and reliability of the cable, no clear specification and standard exists at home and abroad for direct reference, although enterprises and power supply units begin to perform related research and exploration on online monitoring of the running state of the cable at home, the monitoring system is single in function and mostly limited in the aspects of environment monitoring, anti-theft monitoring and the like in tunnels, and the construction of comprehensive online monitoring platforms for the state of the cable such as ultrahigh voltage power cable metal sheath grounding current, cable joint temperature, cable internal partial discharge monitoring, fault location and the like is unprecedented.
The inventor summarizes that the prior art has at least the following defects:
(1) monitoring data information is less, for example, only using smoke detection equipment, partial discharge equipment, video equipment and the like, so that early judgment and early warning of cable faults are inaccurate.
(2) Monitoring data such as partial discharge and circulation of the cable body are not integrated with cable service environment data, and comprehensive early warning cannot be performed on origin of faults of the cable.
(3) Intelligent linkage is not provided, the automation and intelligence degrees are low, and the cable is not processed in time when a disaster occurs; the early warning alarm is not timely.
(4) The data transmission of the actual buried environment of the cable and the energy consumption problem of the equipment use are not considered.
Based on the above problems, various embodiments of the present invention will be specifically described below.
Fig. 1 shows a high-voltage cable comprehensive online intelligent monitoring system, which comprises a field acquisition unit group, a remote monitoring host and a system communication background, wherein the field acquisition unit group comprises a partial discharge acquisition unit, a circulation acquisition unit, a vibration acquisition unit, an environment acquisition unit and a video acquisition unit.
On the basis of fig. 1, referring to fig. 2, fig. 2 schematically shows a data communication diagram of a field acquisition unit group in the system of fig. 1.
Fig. 2 shows, the system adopts the modularized design mode, can carry out the modularized configuration according to different demands, the collection unit that monitoring host computer and monitoring backstage are connected, high frequency office including the cable joint body is put, the sheath circulation, temperature on-line monitoring, liquid level in the tunnel, the well lid, the temperature, humidity, CH4, CO2, H2S, O2, smog, the illumination, the video, control signal such as whole environmental monitoring and linkage fire extinguishing systems such as vibration, water pump system, fan system, carry out comprehensive monitoring and analysis early warning to the cable tunnel, realize the comprehensive perception of cable tunnel, initiative early warning.
On the basis of fig. 1-2, see fig. 3.
The partial discharge acquisition unit comprises a first ultraviolet detection unit, a second ultrasonic detection unit and a partial discharge online monitoring assembly;
the first ultraviolet detection unit acquires ultraviolet signals in a preset range of the high-voltage cable according to a first sampling period;
the second ultrasonic detection unit detects ultrasonic signals in the preset range of the high-voltage cable according to a second sampling period;
the partial discharge acquisition unit also comprises an edge data processing unit;
the edge data processing unit is connected with the first ultraviolet detection unit and the second ultrasonic detection unit;
said second sampling period lags said first sampling period and one of said second sampling period constitute a continuous time segment;
in a time section formed by a first sampling period and a second sampling period which are continuous in time, the edge data processing unit acquires the ultraviolet light signal acquired by the first ultraviolet light monitoring unit and the ultrasonic signal acquired by the second ultrasonic detection unit;
the edge data processing unit obtains a partial discharge identification result based on the ultraviolet light signal and the ultrasonic wave signal;
and obtaining an intelligent monitoring result of the high-voltage cable in the current time section based on the partial discharge identification result and the monitoring result of the environment acquisition unit.
And if the partial discharge identification result obtained by the edge data processing unit indicates that partial discharge exists in the preset range of the high-voltage cable, activating the partial discharge online monitoring component.
Further, the environment acquisition unit further comprises a temperature sensor assembly;
and if the partial discharge identification result obtained by the edge data processing unit indicates that partial discharge exists in the preset range of the high-voltage cable, activating the microclimate monitoring sensor and the temperature sensor assembly.
It should be noted that, in the above embodiments, the edge data processing unit refers to a terminal or a module component capable of locally and independently completing edge calculation.
Edge computing means that an open platform integrating network, computing, storage and application core capabilities is adopted on one side close to an object or a data source to provide nearest-end services nearby. The application program is initiated at the edge side, so that a faster network service response is generated, and the basic requirements of the industry in the aspects of real-time business, application intelligence, safety, privacy protection and the like are met.
In this embodiment, more specifically, the edge calculation is a local calculation on a side close to the data generation source segment, and does not need to constantly communicate with the outside, but only performs data analysis and data prediction locally and independently on the basis of a data processing and engine model having a certain data analysis and processing capability locally, and the edge calculation at least includes an optical joint detection or an optical and optical joint early warning model of local discharge sound of a piezoelectric cable.
A schematic example of said first sampling period and one said second sampling period constituting one continuous time segment can be seen in fig. 4.
In FIG. 4, a plurality of sampling time nodes 0-1 → 2 → 3 → 4 → … … i → i +1 are shown;
in the time period of 0-1, the first ultraviolet detection unit collects ultraviolet signals in a preset range of the high-voltage cable, and the second ultrasonic detection unit does not act (i.e. does not perform ultrasonic detection);
in the interval from the time node 1 to the time node 2, the first ultrasonic detection unit does not operate (stops the ultraviolet detection), and from the time node 1, the second ultrasonic detection unit performs the ultrasonic signal detection within the predetermined range of the high-voltage cable until the time node 2 stops;
in the interval from the time node 2 to the time node 3, the first ultraviolet detection unit collects ultraviolet signals in a preset range of the high-voltage cable, and at the moment, the second ultrasonic detection unit does not act (namely does not perform ultrasonic detection);
and so on;
the above process can be summarized as follows:
the first ultraviolet detection unit acquires ultraviolet signals in a preset range of the high-voltage cable according to a first sampling period;
the second ultrasonic detection unit detects ultrasonic signals in the preset range of the high-voltage cable according to a second sampling period;
the second sampling period lags the first sampling period, and one of the first sampling period and one of the second sampling period constitute one continuous time segment.
Further, see fig. 5.
The partial discharge acquisition unit also comprises a partial discharge online monitoring component;
the partial discharge on-line monitoring assembly monitors partial discharge of the high-voltage cable on line by using a high-frequency method or an ultrahigh-frequency method, independently completes partial discharge signal acquisition and conditioning, interference and monitoring data processing, statistics and analysis of partial discharge parameters such as discharge amount, discharge frequency and the like, completes data display and uploading, and automatically sends out an alarm signal when the partial discharge signal of the cable at a monitored point exceeds a preset value. The partial discharge numerical value of the cable at the monitored point can be displayed in real time, a power frequency periodic discharge diagram, a two-dimensional PRPD and a three-dimensional PRPS discharge spectrogram can be displayed, a historical trend diagram and the like can also be displayed, the current cable partial discharge intensity trend can be conveniently observed, and the running reliability of the cable can be evaluated.
More specifically, the partial discharge online monitoring component carries out quantitative online monitoring on partial discharge of the high-voltage cable to obtain a plurality of partial discharge parameter values;
and when at least one partial discharge parameter value meets an early warning condition, sending an alarm signal to the remote monitoring host.
The quantitative online monitoring comprises the steps of calculating the voltage and current correlation ratio of any point of the high-voltage cable with the preset unit length and partial discharge in the preset range of the high-voltage cable, and representing the calculated voltage change value of the high-voltage cable with the preset unit length based on the correlation ratio.
Wherein the voltage to current correlation ratio may be defined as follows:
wherein L is0、R0、C0,G0Respectively representing the inductance, resistance, capacitance to ground and conductance of the cable per unit length.
As a further preference, the monitoring system is in communication with a tunnel ventilation system, a fire protection system and a field linkage water pump.
More specifically, the circulating current acquisition unit is used for monitoring the grounding current of the cable sheath and transmitting the monitoring data to the grounding current acquisition master station in real time;
the vibration acquisition unit is used for detecting an external broken signal of the environment where the high-voltage cable is located;
the environment acquisition unit comprises a microclimate monitoring sensor, a water level sensor and a well lid monitoring sensor;
the video acquisition unit comprises an image acquisition unit and an intrusion object discrimination engine.
With reference to fig. 6-7, a further embodiment of the linkage mechanism is given below:
and the circulation acquisition unit realizes sheath circulation monitoring. The system has the function of effectively monitoring the grounding current of the cable sheath, monitors in real time and uploads and alarms abnormal data. The cable grounding current is monitored in real time through a grounding current acquisition master station arranged in a monitoring center; once the cable breaks down, the grounding leakage current is increased, the system can immediately send out an alarm to prompt related personnel to timely process the cable fault.
The system has the function of monitoring the temperature of the cable body and the cable joint in real time, and realizes data refreshing, displaying and uploading according to a fixed time interval; the temperature trend graph of a period of time can be displayed, and the function of over-standard warning of abnormal temperature is achieved. (the temperature sensors include a watchband type temperature sensor and dot matrix type infrared temperature measurement).
Monitoring of environment in tunnel
The environment monitoring in the tunnel comprises microclimate monitoring, water level monitoring and well lid detection
Microclimate monitoring
The system can realize environmental monitoring of oxygen, harmful gases (CO, CO2, H2S and CH4), smoke, temperature and humidity and other parameters in the tunnel; the data is regularly acquired, displayed and uploaded, and the abnormal data is alarmed in real time.
And uploading the monitored gas concentration data to a nearby monitoring host through the Lora gateway. When the concentration of a certain gas reaches or is lower than the set threshold value (oxygen), the host computer automatically uploads the gas to a nearby monitoring host computer. When the concentration of certain gas reaches or is lower than the set threshold value (oxygen), the host automatically gives an alarm to prompt a manager to remotely and manually control or automatically start a tunnel ventilation system or a fire-fighting system (smoke alarm). The fan needs to be linked with a temperature monitoring system, a gas monitoring system and the like, a fan control box is installed on a tunnel wall body below the fan, the fan can be controlled in a manual mode and an automatic mode, the fan can be started and closed on site in the manual mode, and the fan can be controlled to be opened and closed through a remote control terminal (host) in the automatic mode.
The system has the advantages that the water level is monitored, the display and the uploading of water level data can be realized according to fixed time intervals, and the alarm is given in time when the water level exceeds the limit, so that the safety of the service of the cable is guaranteed.
The water level sensor can be put in a water collecting well, the depth of accumulated water is monitored in real time and uploaded to a nearby Lora gateway, and data are periodically uploaded to a monitoring host by the gateway. And once the water level is detected to reach or exceed the set water level threshold, the monitoring host sends an alarm to inform relevant maintenance personnel, triggers the field linkage water pump and controls the water pump to pump water until the water level is restored below the alarm value. It also allows remote control of the pump, and the warning value can be set manually.
The system adopts inclination sensor to monitor the well lid, when the well lid is opened, sends information to the system background, and the suggestion well lid is opened.
The system can accurately monitor the protection target in the tunnel in real time in a dark tunnel environment, can clearly display and record the image of the protection target, and can rapidly and properly give an alarm or perform linkage emergency measures whenever an intrusion event or an abnormal phenomenon occurs. On the one hand, the personal safety of the personnel entering and exiting is guaranteed, and on the other hand, the equipment safety is guaranteed.
The system has the function of external damage prevention monitoring, and when the tunnel is monitored to be damaged by external force, an alarm signal is sent to the system background, so that the safety of equipment can be guaranteed in time.
Further, as preferred, the system further comprises an integrated monitoring background, and the following functions are specifically provided
1) Data recording function
The system background has a data storage function and can correctly record dynamic data, and a dynamic event identifier can be correctly established when the device is abnormal; the safety of the recorded data is ensured; the device should not lose recorded dynamic data due to power interruption, rapid or slow fluctuation and drop; the method has a data aging function, and the useless historical data of the local record is cleaned according to the time dimension.
2) Remote monitoring function based on cloud platform
The system background has reliable communication capacity, can transmit data to a designated server in real time by using a 4G or wireless network, realizes data transmission in different places and control equipment in different places, performs remote online monitoring, running state analysis and diagnosis, and combines the functions of local edge calculation and cloud data monitoring to realize the control of the running state of the cable at any time and any place.
In summary, the comprehensive online intelligent monitoring system for the high-voltage cable realizes multivariable and intelligent associated holographic online monitoring, and becomes a necessary means for comprehensively mastering the state information of the cable-tunnel. The excellent performances mainly comprise the following aspects:
(1) and (4) overall perception. The system comprises high-frequency partial discharge of a cable connector body, sheath commutation, temperature on-line monitoring, and overall environment monitoring of liquid level, well cover, temperature, humidity, CH4, CO2, H2S, O2, smoke, illumination, video, vibration and the like in a tunnel.
(2) And (4) calculating edges. The collected data are calculated in situ, whether the real-time data or the characteristic data are transmitted is determined, and the field acousto-optic alarm based on the threshold value is realized.
(3) And (4) fusing multiple networks. Network protocols such as Zigbee, Lora and the like, WIFI, 4G/5G and the like are fused
(4) And (6) intelligent linkage. The fire-fighting linkage, the video linkage, the fan linkage and the water pump linkage are realized, and the auxiliary linkage of sound-light alarm, invasion prevention, illumination, voice broadcast, remote shouting and the like is also included. (5) And (5) assisting in decision making. The deterioration degree of the insulation performance of the cable is comprehensively judged by integrating the local release information, the circulation information, the cable temperature, the environment temperature and other information, the effective information is integrated with the security, and the start and stop of security measures are remotely controlled.
(6) The installation is convenient. The equipment is small in size and is connected wirelessly, and the energy consumption of the equipment is reduced based on edge calculation. In a word, the system realizes cable fault early warning and analysis processing, and provides reliable auxiliary decision and intelligent early warning reports for operation and maintenance personnel.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A high-voltage cable comprehensive online intelligent monitoring system comprises a field acquisition unit group, a remote monitoring host and a system communication background, wherein the field acquisition unit group comprises a partial discharge acquisition unit, a vibration acquisition unit, an environment acquisition unit and a video acquisition unit;
the vibration acquisition unit is used for detecting an external broken signal of the environment where the high-voltage cable is located;
the environment acquisition unit comprises a microclimate monitoring sensor and a temperature sensor assembly;
the video acquisition unit comprises an image acquisition unit and an intrusion target discrimination engine;
the partial discharge acquisition unit comprises a first ultraviolet detection unit, a second ultrasonic detection unit, an edge data processing unit and a partial discharge online monitoring assembly;
the first ultraviolet detection unit acquires ultraviolet signals in a preset range of the high-voltage cable according to a first sampling period;
the second ultrasonic detection unit detects ultrasonic signals in the preset range of the high-voltage cable according to a second sampling period;
said second sampling period lags said first sampling period and one of said second sampling period constitute a continuous time segment;
the edge data processing unit is connected with the first ultraviolet detection unit and the second ultrasonic detection unit;
in a time section formed by a first sampling period and a second sampling period which are continuous in time, the edge data processing unit acquires the ultraviolet light signal acquired by the first ultraviolet light monitoring unit and the ultrasonic signal acquired by the second ultrasonic detection unit;
the edge data processing unit obtains a partial discharge identification result based on the ultraviolet light signal and the ultrasonic wave signal;
if the partial discharge identification result obtained by the edge data processing unit is that partial discharge exists in the preset range of the high-voltage cable, activating the partial discharge online monitoring assembly, the microclimate monitoring sensor and the temperature sensor assembly;
obtaining an intelligent monitoring result of the high-voltage cable in the current time section based on the partial discharge identification result and the monitoring result of the environment acquisition unit;
and if the partial discharge identification result obtained by the edge data processing unit indicates that partial discharge does not exist in the preset range of the high-voltage cable, the microclimate monitoring sensor and the temperature sensor assembly are closed.
2. The high-voltage cable comprehensive online intelligent monitoring system of claim 1, characterized in that:
the partial discharge on-line monitoring component carries out quantitative on-line monitoring on partial discharge of the high-voltage cable to obtain a plurality of partial discharge parameter values;
when at least one partial discharge parameter value meets an early warning condition, sending an alarm signal to the remote monitoring host;
the quantitative online monitoring comprises the steps of calculating a voltage and current correlation ratio of any point of a high-voltage cable with a preset unit length and partial discharge in a preset range of the high-voltage cable, and calculating a voltage change value of the high-voltage cable with the preset unit length based on the correlation ratio;
wherein the voltage to current correlation ratio may be defined as follows:
wherein L is0、R0、C0,G0Respectively representInductance, resistance, capacitance to ground, and conductance per unit length of cable.
3. The high-voltage cable comprehensive on-line intelligent monitoring system as claimed in claim 1 or 2, characterized in that:
the monitoring system is communicated with the tunnel ventilation system and the fire fighting system;
and when the first target parameter monitored by the microclimate monitoring sensor meets a first preset condition, automatically starting the tunnel ventilation system and/or the fire fighting system.
4. The high-voltage cable comprehensive on-line intelligent monitoring system as claimed in claim 1 or 2, characterized in that:
the monitoring system is communicated with the on-site linkage water pump;
the environment acquisition unit comprises a water level sensor;
and when a second target parameter monitored by the water level sensor meets a second preset condition, starting the site linkage water pump.
5. The high-voltage cable comprehensive on-line intelligent monitoring system as claimed in claim 1 or 2, characterized in that:
the field acquisition unit group comprises a circulation acquisition unit; the circulating current acquisition unit is used for monitoring the grounding current of the cable sheath and transmitting monitoring data to the grounding current acquisition master station in real time.
6. The high-voltage cable comprehensive online intelligent monitoring system of claim 5, characterized in that:
the circulation collection unit realizes sheath circulation monitoring; monitoring the grounding current of the cable in real time through a grounding current acquisition master station arranged in a monitoring center; once the cable breaks down, the grounding leakage current is increased, the system gives an alarm to prompt related personnel to timely process the cable fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110072102.4A CN112684310B (en) | 2021-01-20 | 2021-01-20 | Comprehensive online intelligent monitoring system for high-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110072102.4A CN112684310B (en) | 2021-01-20 | 2021-01-20 | Comprehensive online intelligent monitoring system for high-voltage cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112684310A CN112684310A (en) | 2021-04-20 |
| CN112684310B true CN112684310B (en) | 2022-01-07 |
Family
ID=75458645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110072102.4A Active CN112684310B (en) | 2021-01-20 | 2021-01-20 | Comprehensive online intelligent monitoring system for high-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112684310B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804762B (en) * | 2021-09-01 | 2023-11-21 | 国网内蒙古东部电力有限公司兴安供电公司 | Equipment fault detection method and system based on multispectral three-in-one image |
| CN114323113A (en) * | 2021-10-21 | 2022-04-12 | 国网山东省电力公司电力科学研究院 | High-voltage cable intelligent sensing terminal, system and low-power consumption management monitoring method |
| CN114646345A (en) * | 2022-02-23 | 2022-06-21 | 国网浙江省电力有限公司嘉兴供电公司 | Digital twin monitoring device and monitoring method for looped network room |
| CN115967174A (en) * | 2022-11-30 | 2023-04-14 | 广东电网有限责任公司 | Distribution network cable management and control system |
| CN116483019B (en) * | 2023-06-16 | 2023-08-25 | 深圳市汇辰自动化技术有限公司 | Industrial Internet of things cloud management and control system based on PLC |
| CN118091325B (en) * | 2024-04-17 | 2024-06-25 | 江苏裕荣光电科技有限公司 | Intelligent cable detection method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275094A (en) * | 2019-05-05 | 2019-09-24 | 电子科技大学 | A kind of high-tension cable shelf depreciation acousto-optic associated detecting method and system |
| CN110388964A (en) * | 2019-08-16 | 2019-10-29 | 深圳江行联加智能科技有限公司 | A kind of methods, devices and systems of tunnel cable data acquisition |
| CN111404989A (en) * | 2020-02-13 | 2020-07-10 | 马瑞 | Intelligent monitoring, early warning and emergency maintenance guiding system for distribution cable based on Internet of things |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203070069U (en) * | 2013-01-28 | 2013-07-17 | 时翔 | Integrated monitoring system for power cable tunnel |
| CN104050793A (en) * | 2014-06-26 | 2014-09-17 | 国家电网公司 | Intelligent online monitoring and pre-warning system for cable operation condition |
| CN104823552B (en) * | 2015-04-13 | 2016-08-17 | 王镱钧 | Device for treatment of seeds based on ultraviolet light and ultrasound wave mixed synchronization pulse and method |
| GB201610819D0 (en) * | 2016-06-21 | 2016-08-03 | Smart Component Tech Ltd | Monitoring system and method |
| CN107025756B (en) * | 2017-04-28 | 2019-02-22 | 国网山东省电力公司寿光市供电公司 | A kind of intelligent electric checking bollard |
| CN107589343A (en) * | 2017-09-08 | 2018-01-16 | 武汉伊莱维特电力科技有限公司 | Broken monitoring device outside a kind of light sensing circuit |
| CN107976602A (en) * | 2017-11-14 | 2018-05-01 | 长园深瑞继保自动化有限公司 | High-tension cable metal outer jacket grounding circulation on-line monitoring system |
| JP7089439B2 (en) * | 2018-08-23 | 2022-06-22 | 株式会社日立製作所 | Abnormality diagnosis device and abnormality diagnosis method |
| CN209541793U (en) * | 2018-12-29 | 2019-10-25 | 武汉朗德电气有限公司 | A kind of high-tension cable passway for transmitting electricity composite monitoring device |
| CN110865281A (en) * | 2019-10-22 | 2020-03-06 | 国网江苏省电力有限公司电力科学研究院 | Cable partial discharge detection device and method based on edge calculation |
| CN111104880A (en) * | 2019-12-09 | 2020-05-05 | 北京国网富达科技发展有限责任公司 | Method, device and system for processing cable tunnel state data |
| CN110957685A (en) * | 2019-12-18 | 2020-04-03 | 杭州巨骐信息科技股份有限公司 | Comprehensive intelligent grounding box |
| CN111207793B (en) * | 2020-03-11 | 2021-12-28 | 山东和兑智能科技有限公司 | Cable tunnel environment monitoring device and system |
| CN111596175A (en) * | 2020-04-17 | 2020-08-28 | 中国电力科学研究院有限公司 | Cable intermediate joint built-in partial discharge measurement method and system |
| CN111862505A (en) * | 2020-07-29 | 2020-10-30 | 杭州巨骐信息科技股份有限公司 | Holographic perception external damage monitoring system |
| CN112216077B (en) * | 2020-09-02 | 2022-04-26 | 国网河北省电力有限公司电力科学研究院 | Internet of things perception monitoring system, monitoring and early warning method, mobile terminal and cloud server |
-
2021
- 2021-01-20 CN CN202110072102.4A patent/CN112684310B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275094A (en) * | 2019-05-05 | 2019-09-24 | 电子科技大学 | A kind of high-tension cable shelf depreciation acousto-optic associated detecting method and system |
| CN110388964A (en) * | 2019-08-16 | 2019-10-29 | 深圳江行联加智能科技有限公司 | A kind of methods, devices and systems of tunnel cable data acquisition |
| CN111404989A (en) * | 2020-02-13 | 2020-07-10 | 马瑞 | Intelligent monitoring, early warning and emergency maintenance guiding system for distribution cable based on Internet of things |
Non-Patent Citations (1)
| Title |
|---|
| 基于边缘计算的电缆接头运行状态智能传感与监测;曹培 等;《高压电器》;20200930;第56卷(第9期);第26-32页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112684310A (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112684310B (en) | Comprehensive online intelligent monitoring system for high-voltage cable | |
| CN111107675B (en) | Cable channel edge Internet of things terminal and method based on ubiquitous power Internet of things | |
| CN205486332U (en) | Nobody system of patrolling and examining of intelligence | |
| CN213336218U (en) | Comprehensive monitoring system applied to cable channel | |
| CN109546750B (en) | Transformer substation auxiliary control system, method and device | |
| CN211293777U (en) | Intelligent grid type prefabricated switching station taking energy service gateway as core of monitoring system | |
| CN104133510A (en) | Transformer substation indoor environment remote monitoring system | |
| CN212781058U (en) | Intelligent fault early warning management system for power cable | |
| CN103809570A (en) | Underground shaftway multi-data collecting and controlling system | |
| CN109211313A (en) | Electric power piping lane fire behavior based on Internet of Things monitors disposal system | |
| CN205880105U (en) | Power cable integrated monitoring platform | |
| CN105375627A (en) | Distribution substation running state monitoring and security pre-warning apparatus | |
| CN211651687U (en) | Real-time dynamic monitoring system based on transformer substation cable trench comprehensive environment | |
| CN110888373A (en) | Intelligent inspection system and method for abnormity of transformer substation equipment | |
| CN114705959A (en) | Power cable and channel on-line monitoring system | |
| CN112991657A (en) | Forest fire intelligent early warning control system based on 5G communication technology | |
| CN114063548A (en) | Cable trench comprehensive environment monitoring method and system | |
| CN112701786B (en) | 220kV and below electric voltage class skid-mounted electronic control integrated transformer substation | |
| CN114326548A (en) | Cable tunnel integrated monitoring system | |
| CN203965982U (en) | Transformer station's indoor environment long-distance monitorng device | |
| CN111145487A (en) | Diesel power station cable and equipment fireproof monitoring system and method | |
| CN111289038A (en) | Intelligent cable explosion-proof box online monitoring system and control method thereof | |
| CN204143281U (en) | Distribution substation ambient intelligence supervisory system | |
| CN214674537U (en) | Intelligent control transformer substation monitoring platform | |
| CN115766776A (en) | Method for realizing real-time state monitoring of power channel and edge internet of things terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |