CN113671305A - Comprehensive sensing system for power transmission line - Google Patents
Comprehensive sensing system for power transmission line Download PDFInfo
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- CN113671305A CN113671305A CN202110670141.4A CN202110670141A CN113671305A CN 113671305 A CN113671305 A CN 113671305A CN 202110670141 A CN202110670141 A CN 202110670141A CN 113671305 A CN113671305 A CN 113671305A
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- 238000012545 processing Methods 0.000 claims abstract description 61
- 238000012544 monitoring process Methods 0.000 claims abstract description 53
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 25
- 238000012423 maintenance Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000002265 prevention Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 5
- 238000013500 data storage Methods 0.000 claims description 4
- 230000006870 function Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- 230000008447 perception Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 208000024891 symptom Diseases 0.000 abstract description 2
- 230000003044 adaptive effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The invention discloses a comprehensive sensing system for a power transmission line, which comprises a distributed short-circuit fault acquisition and processing unit, a distributed ground fault and online temperature measurement acquisition and processing unit, a background comprehensive management software platform and a server, wherein the distributed short-circuit fault acquisition and processing unit, the distributed ground fault and online temperature measurement acquisition and processing unit and the background comprehensive management software platform are electrically and bidirectionally connected with the server. The on-line sensing system realizes the comprehensive monitoring of the cable state by means of an intelligent wireless communication technology, timely masters the abnormal or fault symptoms of the cable running state, and reports data so as to take corresponding measures, quickly reach the fault point position, realize the quick positioning and maintenance of the cable fault, and optimize the maintenance period, thereby avoiding or reducing the occurrence of major accidents.
Description
Technical Field
The invention relates to the technical field of electric wire monitoring, in particular to a comprehensive sensing system for a power transmission line.
Background
The self-healing and self-adaptation requirements of the power transmission network require that an electric power department constantly master the operation state of the power transmission line, timely discover, quickly diagnose and eliminate fault hidden dangers, timely discover and process faults, avoid accidents such as large-area and long-time power failure, and the like.
The existing transmission line comprehensive sensing system has the serious problems that the running state of a cable cannot be monitored all weather when the transmission line comprehensive sensing system is used, and a fault point of the cable cannot be rapidly and accurately positioned, so that the occurrence probability of major accidents can be improved, and the future maintenance cost can be increased because the cable is positioned in a channel.
Disclosure of Invention
The invention aims to provide a comprehensive sensing system for a power transmission line, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a power transmission line comprehensive sensing system comprises a distributed short-circuit fault acquisition and processing unit, a distributed ground fault and online temperature measurement acquisition and processing unit, a background comprehensive management software platform and a server, wherein the distributed short-circuit fault acquisition and processing unit, the distributed ground fault and online temperature measurement acquisition and processing unit and the background comprehensive management software platform are electrically and bidirectionally connected with the server, the distributed short-circuit fault acquisition and processing unit comprises a short-circuit fault monitoring module, a first automatic reset module, a first ground fault monitoring module, a first fault current self-adaption judgment module, an anti-false alarm module, a communication module, a processor and a first current monitoring and sending module, and the distributed ground fault and online temperature measurement acquisition and processing unit comprises a second ground fault monitoring module, a second automatic reset module, a temperature early warning module, a second fault current self-adaption judgment module, The background comprehensive management software platform comprises a real-time monitoring module, a manual reset module, a power-on self-checking module, a monitoring module, a data storage module, a timing and timing module and a disconnection continuous transmission module, and the server is electrically connected with the database in a two-way mode.
As a preferred embodiment of the present invention, the false alarm prevention module includes a load fluctuation false alarm prevention module, a transformer no-load switching inrush current false alarm prevention module, a line sudden-switching load inrush current false alarm prevention module, a switching large-load false alarm prevention module, and a switching inrush current false alarm prevention module when a non-fault phase reclosing occurs.
As a preferred embodiment of the present invention, both the first fault current adaptive determination module and the second fault current adaptive determination module may detect data collected by a sensor in real time, and perform algorithm processing by using a waveform feature method.
As a preferred embodiment of the present invention, the first automatic reset module and the second automatic reset module are configured to automatically perform a reset operation after the cable current returns to normal or a set fault reset time is exceeded.
As a preferred embodiment of the present invention, the first current monitoring sending module and the second current monitoring sending module each include a load monitoring module and a heartbeat monitoring module, the load monitoring is to monitor the current fluctuation of the cable in real time, and the heartbeat monitoring module includes sending heartbeat data to the background integrated management software platform at regular time every day.
As a preferred embodiment of the present invention, the timing module is configured to time-calibrate the distributed short-circuit fault acquisition and processing unit and the distributed ground fault and online temperature measurement acquisition and processing unit at regular time.
As a preferred embodiment of the present invention, the circuit failure monitoring step:
s1: first study and judgment on faults: the distributed short-circuit fault acquisition and processing unit acquires current indexes in the cable, load current and fault current parameters, simultaneously carries out fault study and judgment according to current conditions, judges whether a fault occurs or not, and records and reports the fault;
s2: and (3) carrying out second judgment on the fault: the distributed ground fault and on-line temperature measurement acquisition and processing unit acquires zero-sequence current and temperature index parameters of the cable; when a cable has a ground fault, carrying out comprehensive fault study and judgment according to the transient signal characteristics of zero sequence current during grounding, judging whether the fault occurs, and recording and reporting; the temperature of the cable is measured in real time, and the temperature value is actively reported every other period of time, so that uninterrupted temperature detection for 24 hours is realized; when the temperature reaches a threshold value or the temperature changes suddenly in a short time, immediately recording and reporting;
s3: fault positioning: the distributed short-circuit fault acquisition and processing unit, the distributed ground fault and online temperature measurement acquisition and processing unit and the background comprehensive management software platform can perform data transmission through an 2/3/4G special APN network; the distributed short-circuit fault acquisition and processing unit has a GPS/Beidou positioning function, and reports positioning information to the background integrated management software platform to realize monitoring of the position of the equipment and fault positioning;
s4: and (3) overhauling: and the background comprehensive management software platform realizes upper-layer fault study and judgment logic, performs fault positioning display based on topology management of cables and a GIS system, and provides a comprehensive maintenance strategy.
As a preferred embodiment of the present invention, the distributed ground fault and online temperature measurement acquisition and processing unit is installed at a cable joint, and the distributed short-circuit fault acquisition and processing unit is installed on the cable at equal intervals and at a distance of 100 meters.
Compared with the prior art, the invention has the following beneficial effects:
1. the on-line sensing system realizes the comprehensive monitoring of the cable state by means of an intelligent wireless communication technology, timely grasps the abnormal state or fault symptom of the cable operation state, reports data so as to take corresponding measures, quickly reaches the fault point position, realizes the quick positioning maintenance of the cable fault, optimizes the maintenance period, and avoids or reduces the occurrence of major accidents.
2. The platform adopts algorithms such as self-learning and waveform characteristics to carry out mathematical modeling on the system and carry out comprehensive processing on data so as to meet various different running conditions of the cable, avoid setting a complex threshold value, meet the dynamic change requirement of the cable power and realize fault study and judgment on the basis.
3. The distributed processing unit works in severe environments such as a cable trench and the like, wireless network communication is reasonably designed, existing resources are effectively utilized, and future maintenance cost is reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a connection diagram of a comprehensive sensing system of a power transmission line according to the present invention;
FIG. 2 is a block diagram of a distributed short-circuit fault acquisition and processing unit of the comprehensive sensing system for the power transmission line;
FIG. 3 is a structural block diagram of a distributed ground fault and online temperature measurement acquisition processing unit of the comprehensive sensing system for the power transmission line;
FIG. 4 is a block diagram of a background integrated management software platform of the integrated sensing system for power transmission lines according to the present invention;
fig. 5 is a fault location diagram of the power transmission line comprehensive sensing system of the invention.
In the figure: 100. a distributed short-circuit fault acquisition and processing unit; 110. monitoring short-circuit faults; 120. a first automatic reset module; 130. first ground fault monitoring; 140. a first fault current self-adaptive judgment module; 150. a false alarm prevention module; 160. a communication module; 170. a processor; 180. a first current monitoring and transmitting module; 200. a distributed earth fault and online temperature measurement acquisition processing unit; 210. second ground fault monitoring; 220. a second automatic reset module; 230. temperature early warning; 240. a second fault current self-adaptive judgment module; 250. a self-checking module; 260. a communicator; 270. a processing module; 280. a second current monitoring and transmitting module; 300. a background integrated management software platform; 310. a real-time monitoring module; 320. manual reset; 330. a power-on self-test module; 340. a monitoring module; 350. a data storage module; 360. a timing module; 370. a broken wire continuous transmission module; 400. a server; 410. a database.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a power transmission line comprehensive sensing system comprises a distributed short-circuit fault acquisition and processing unit 100, a distributed ground fault and online temperature measurement acquisition and processing unit 200, a background comprehensive management software platform 300 and a server 400, wherein the distributed short-circuit fault acquisition and processing unit 100, the distributed ground fault and online temperature measurement acquisition and processing unit 200 and the background comprehensive management software platform 300 are electrically and bidirectionally connected with the server 400, the distributed short-circuit fault acquisition and processing unit 100 comprises a short-circuit fault monitoring module 110, a first automatic reset module 120, a first ground fault monitoring module 130, a first fault current self-adaptive judgment module 140, an anti-false alarm module 150, a communication module 160, a processor 170 and a first current monitoring and sending module 180, the distributed ground fault and online temperature measurement acquisition and processing unit 200 comprises a second ground fault monitoring module 210, a second automatic reset module 220, a temperature early warning module 230, a temperature early warning module and a temperature early warning module, The second fault current self-adaptive judgment module 240, the self-checking module 250, the communicator 260, the processing module 270 and the second current monitoring and sending module 280, the background comprehensive management software platform 300 includes a real-time monitoring module 310, a manual reset 320, a power-on self-checking module 330, a monitoring module 340, a data storage module 350, a time-checking and timing module 360 and an offline continuous transmission module 370, and the server 400 is electrically connected to the database 410 in a bidirectional manner.
In the invention, when the cable connector is installed, the shell is separated, the base is installed firstly, the cable is clamped into the base, the circuit is firmly fixed by the wire clamp, the upper shell and the lower shell are clamped by the clamp after the upper shell and the lower shell are installed, the power switch is pressed, and the system enters a working state at the moment; s1 is a substation outlet switch, and F1-F9 are fault indicators; if a fault occurs between F5 and F6, firstly, the switch S1 trips the short circuit/ground protection action, then fault indicators F1 to F5 experience short circuit/ground fault current, turn over the card and report fault signals, other fault indicators do not experience fault current and do not act, and the fault occurs between the last fault indicator F5 reporting an overcurrent signal and the first fault indicator F6 not reporting the overcurrent signal; all units along the front end of the cable fault point capture fault information and report the data, thereby completing the fault positioning function of the whole line.
In an alternative embodiment, the false alarm prevention module 150 includes a load fluctuation false alarm, a transformer no-load switching inrush current false alarm, a line inrush load inrush current false alarm, a switching large load false alarm, and a switching inrush current false alarm when there is no fault reclosing.
It should be noted that the false alarm prevention module 150 is capable of alarming according to different fault conditions occurring in the cable.
In an alternative embodiment, both the first fault current adaptive determination module 140 and the second fault current adaptive determination module 240 may detect data collected by the sensor in real time and perform an algorithm processing by using a waveform feature method.
It should be noted that the first fault current adaptive determination module 140 and the second fault current adaptive determination module 240 automatically determine the fault by using a self-learning method based on the existing cable load.
In an alternative embodiment, the first automatic reset module 120 and the second automatic reset module 220 are used for automatically performing the reset operation after the cable current is recovered to be normal or the set fault reset time is exceeded.
It should be noted that, by adopting the redundant backup design, single-point failure is avoided, and long-term, reliable and stable operation of the processing unit is ensured.
In an optional embodiment, the first current monitoring sending module 180 and the second current monitoring sending module 280 each include a load monitoring module and a heartbeat monitoring module, the load monitoring is to monitor the cable current fluctuation in real time, and the heartbeat monitoring module includes sending heartbeat data to the background integrated management software platform 300 at regular time every day.
It should be noted that, by using the distributed data acquisition technology, the problem of multi-parameter synchronous acquisition is solved, and real-time and accurate parameter data are provided for the platform.
In an alternative embodiment, the timing module 360 is used for timing the distributed short-circuit fault acquisition and processing unit 100 and the distributed ground fault and online temperature measurement acquisition and processing unit 200.
In an alternative embodiment, the circuit fault monitoring step:
s1: first study and judgment on faults: the distributed short-circuit fault acquisition and processing unit 100 acquires current indexes in the cable, load current and fault current parameters, simultaneously conducts fault study and judgment according to current conditions, judges whether a fault occurs or not, and records and reports the fault;
s2: and (3) carrying out second judgment on the fault: the distributed ground fault and online temperature measurement acquisition and processing unit 200 acquires zero-sequence current and temperature index parameters of the cable; when a cable has a ground fault, carrying out comprehensive fault study and judgment according to the transient signal characteristics of zero sequence current during grounding, judging whether the fault occurs, and recording and reporting; the temperature of the cable is measured in real time, and the temperature value is actively reported every other period of time, so that uninterrupted temperature detection for 24 hours is realized; when the temperature reaches a threshold value or the temperature changes suddenly in a short time, immediately recording and reporting;
s3: fault positioning: the distributed short-circuit fault acquisition and processing unit 100, the distributed ground fault and online temperature measurement acquisition and processing unit 200 and the background comprehensive management software platform 300 can perform data transmission through an 2/3/4G special APN network; the distributed short-circuit fault acquisition and processing unit 100 has a GPS/Beidou positioning function, and reports positioning information to the background integrated management software platform 300 to realize monitoring of the position of the equipment and fault positioning;
s4: and (3) overhauling: the background comprehensive management software platform 300 realizes upper layer fault study and judgment logic, performs fault positioning display based on topology management of cables and a GIS system, and provides a comprehensive maintenance strategy.
It should be noted that, after the unit detects that the cable has a fault, the man-machine interface prompts the position name and the serial number along the fault cable, and provides quick positioning information.
In an alternative embodiment, the distributed ground fault and online temperature measurement acquisition and processing unit 200 is installed at a cable joint, and the distributed short-circuit fault acquisition and processing units 100 are installed on the cable at equal intervals and are spaced by 100 meters.
It should be noted that, the self-learning algorithm is used to diagnose the cable fault and remind.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a transmission line perception system that synthesizes, includes that distributed short-circuit fault gathers processing unit (100), distributed earth fault and online temperature measurement gather processing unit (200), backstage integrated management software platform (300) and server (400), its characterized in that: distributed short-circuit fault acquisition and processing unit (100), distributed earth fault and online temperature measurement acquisition and processing unit (200) and background integrated management software platform (300) are electrically and bidirectionally connected server (400), distributed short-circuit fault acquisition and processing unit (100) comprises short-circuit fault monitoring (110), a first automatic reset module (120), first earth fault monitoring (130), a first fault current self-adaption judgment module (140), an anti-false alarm module (150), a communication module (160), a processor (170) and a first current monitoring and sending module (180), distributed earth fault and online temperature measurement acquisition and processing unit (200) comprises second earth fault monitoring (210), a second automatic reset module (220), temperature early warning (230), a second fault current self-adaption judgment module (240), a self-checking module (250), The background comprehensive management software platform (300) comprises a real-time monitoring module (310), a manual reset module (320), a starting self-checking module (330), a monitoring module (340), a data storage module (350), a timing module (360) and a disconnection continuous transmission module (370), and the server (400) is electrically connected with the database (410) in a two-way mode.
2. The power transmission line comprehensive sensing system according to claim 1, characterized in that: the false alarm prevention module (150) comprises a load fluctuation false alarm prevention, a transformer no-load switching inrush current false alarm prevention, a line sudden-closing load inrush current false alarm prevention, a switching large-load false alarm prevention and a switching inrush current false alarm prevention during non-fault reclosing.
3. The power transmission line comprehensive sensing system according to claim 1, characterized in that: the first fault current self-adaptive judging module (140) and the second fault current self-adaptive judging module (240) can detect data acquired by a sensor in real time and perform algorithm processing by using a waveform characteristic method.
4. The power transmission line comprehensive sensing system according to claim 1, characterized in that: the first automatic reset module (120) and the second automatic reset module (220) are used for automatically resetting the cable after the current of the cable is recovered to be normal or the set fault resetting time is exceeded.
5. The power transmission line comprehensive sensing system according to claim 1, characterized in that: first current monitoring sending module (180) and second current monitoring sending module (280) all include load monitoring module and heartbeat monitoring module, load monitoring is real-time supervision cable current fluctuation, heartbeat monitoring module includes regularly to backstage integrated management software platform (300) transmission heartbeat data every day.
6. The power transmission line comprehensive sensing system according to claim 1, characterized in that: the time correcting module (360) is used for correcting the distributed short-circuit fault acquisition processing unit (100) and the distributed ground fault and online temperature measurement acquisition processing unit (200) at regular time.
7. The power transmission line comprehensive sensing system according to claim 1, characterized in that: a circuit fault monitoring step:
s1: first study and judgment on faults: the distributed short-circuit fault acquisition and processing unit (100) acquires current indexes in the cable, load current and fault current parameters, simultaneously carries out fault study and judgment according to current conditions, judges whether a fault occurs or not, and records and reports the fault;
s2: and (3) carrying out second judgment on the fault: the distributed ground fault and online temperature measurement acquisition processing unit (200) acquires zero sequence current and temperature index parameters of the cable; when a cable has a ground fault, carrying out comprehensive fault study and judgment according to the transient signal characteristics of zero sequence current during grounding, judging whether the fault occurs, and recording and reporting; the temperature of the cable is measured in real time, and the temperature value is actively reported every other period of time, so that uninterrupted temperature detection for 24 hours is realized; when the temperature reaches a threshold value or the temperature changes suddenly in a short time, immediately recording and reporting;
s3: fault positioning: the distributed short-circuit fault acquisition and processing unit (100), the distributed ground fault and online temperature measurement acquisition and processing unit (200) and the background comprehensive management software platform (300) can perform data transmission through an 2/3/4G special APN network; the distributed short-circuit fault acquisition and processing unit (100) has a GPS/Beidou positioning function, and reports positioning information to the background integrated management software platform (300) to realize monitoring of the position of equipment and fault positioning;
s4: and (3) overhauling: the background comprehensive management software platform (300) realizes upper layer fault study and judgment logic, performs fault positioning display based on topology management of cables and a GIS system, and provides a comprehensive maintenance strategy.
8. The power transmission line comprehensive sensing system according to claim 7, characterized in that: the distributed ground fault and online temperature measurement acquisition and processing unit (200) is arranged at a cable joint, and the distributed short-circuit fault acquisition and processing unit (100) is arranged on a cable at equal intervals at a distance of 100 meters.
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