CN114740306A - Power grid informatization-based power distribution network line fault online monitoring and early warning management system - Google Patents
Power grid informatization-based power distribution network line fault online monitoring and early warning management system Download PDFInfo
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- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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Abstract
The invention discloses a power distribution network line fault online monitoring and early warning management system based on power grid informatization, which screens fault types of each section of fault power sub-line in an underground power distribution network to be monitored according to endpoint currents of each section of power sub-line in the underground power distribution network to be monitored, detects related parameters at each monitoring point in each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, further determines fault monitoring points corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, and simultaneously processes corresponding early warning levels according to the line types corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, thereby improving the fault elimination efficiency of the power lines, reducing the time for finding faults and repairing the faults in the later period, and further improving the power supply reliability of the underground power distribution network, the safe power supply of the underground distribution network is further guaranteed.
Description
Technical Field
The invention relates to the technical field of power distribution network line fault monitoring, in particular to a power distribution network line fault on-line monitoring and early warning management system based on power grid informatization.
Background
The underground distribution network is an important public infrastructure for national economy and social development, no matter national life or factory production, no power supply is needed in scientific research, and the line fault of the underground distribution network has non-negligible influence on life and work of people. Therefore, if a power line has a fault, the fault needs to be monitored in time, the fault position needs to be determined as accurately as possible, and reliable reference is provided for the power distribution network management center to overhaul.
At present, current underground distribution network line fault monitoring system combines artifical line patrol fault monitoring management basically, when the underground distribution network line breaks down, through the power maintenance personnel seek trouble position along the line, but such mode not only reduces troubleshooting efficiency, increases the time of seeking trouble and later stage restoration trouble moreover, leads to the safe power supply of unable effective guarantee underground distribution network to cause great economic loss for the city, further can't satisfy city resident's domestic power consumption demand.
The existing underground distribution network line fault monitoring system mainly analyzes line fault types through power maintenance personnel by virtue of work experience, but has the problems of inconsistent personnel knowledge reserves, inconsistent experience capabilities and inconsistent reference standards, so that the line fault types cannot be accurately and effectively analyzed, the underground distribution network line faults cannot be pertinently processed, and the power supply reliability of the underground distribution network is reduced to the greatest extent.
Disclosure of Invention
In view of this, in order to solve the problems proposed in the background art, a power distribution network line fault online monitoring and early warning management system based on power grid informatization is proposed, so as to realize online monitoring and early warning management on the faults of the underground power distribution network line.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a power distribution network line fault on-line monitoring and early warning management system based on power grid informatization, which comprises the following components:
underground distribution network line divides module: the monitoring system is used for dividing the power line in the underground power distribution network to be monitored into various sections of power sub-lines and distributing monitoring points on the various sections of power sub-lines in the underground power distribution network to be monitored;
line endpoint current detection module: the system is used for detecting the endpoint current of each section of power sub-line in the underground power distribution network to be monitored, and comparing to obtain the endpoint current difference of each section of power sub-line in the underground power distribution network to be monitored;
the fault power sub-line screening and analyzing module comprises: the fault detection device is used for screening fault power sub-lines of all sections in the underground power distribution network to be monitored according to the endpoint current difference of all sections in the underground power distribution network to be monitored, and analyzing the fault types of all sections of fault power sub-lines in the underground power distribution network to be monitored;
the fault power sub-line parameter detection module: the method is used for detecting relevant parameters of each monitoring point in each section of fault power sub-line of each fault type in the underground power distribution network to be monitored;
the fault power sub-line parameter analysis module: the monitoring system is used for analyzing relevant parameters at monitoring points in each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, and determining fault monitoring points corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored;
the fault power sub-line early warning processing module: and the method is used for processing corresponding early warning levels according to the line types corresponding to all sections of fault power sub-lines in all fault types in the underground power distribution network to be monitored.
Preferably, the underground distribution network line division module specifically includes in detail:
dividing an electric power line in the underground power distribution network to be monitored into all sections of electric power sub-lines according to a line equidistant dividing mode, numbering all sections of electric power sub-lines in the underground power distribution network to be monitored, simultaneously respectively arranging a plurality of monitoring points in all sections of electric power sub-lines in the underground power distribution network to be monitored according to an equidistant arrangement mode, positioning the arrangement positions of all monitoring points in all sections of electric power sub-lines in the underground power distribution network to be monitored, and numbering all monitoring points in all sections of electric power sub-lines in the underground power distribution network to be monitored.
Preferably, the obtaining mode of the terminal current difference value of each section of power sub-line in the underground power distribution network to be monitored in the line terminal current detection module is as follows:
the method comprises the steps of detecting the initial end current and the terminal end current of each section of power sub-line in the underground power distribution network to be monitored in real time through a current sensor, comparing the initial end current and the terminal end current of each section of power sub-line in the underground power distribution network to be monitored with the preset rated current of the power line in the underground power distribution network respectively, and obtaining the initial end current difference value and the terminal end current difference value of each section of power sub-line in the underground power distribution network to be monitored.
Preferably, the specific screening and analyzing mode corresponding to the fault power sub-line screening and analyzing module is as follows:
comparing the initial end current difference and the terminal current difference of each section of power sub-line in the underground distribution network to be monitored with a preset allowable current error value respectively according to the end point current difference of each section of power sub-line in the underground distribution network to be monitored, if the initial end current difference or the terminal current difference of a certain section of power sub-line in the underground distribution network to be monitored is greater than the preset allowable current error value, judging that the section of power sub-line in the underground distribution network to be monitored has an abnormal fault, screening and counting each section of power sub-line with the abnormal fault in the underground distribution network to be detected, marking as each section of fault power sub-line in the underground distribution network to be detected, analyzing the fault type of each section of fault power sub-line in the underground distribution network to be monitored according to the end point current difference of each section of fault power sub-line in the underground distribution network to be detected, counting each section of fault power sub-line in each fault type in the underground distribution network to be monitored, wherein each fault type is an open circuit fault type and a short circuit fault type.
Preferably, the fault power sub-line parameter detection module includes an open-circuit fault type line parameter detection unit, the open-circuit fault type line parameter detection unit is configured to detect three-phase voltages at monitoring points in each fault power sub-line of the open-circuit fault type in the underground power distribution network to be monitored, record each fault power sub-line of the open-circuit fault type as each open-circuit fault power sub-line, count effective values of the three-phase voltages at the monitoring points in each open-circuit fault power sub-line in the underground power distribution network to be monitored, and record each effective value of the three-phase voltages at the monitoring points in each open-circuit fault power sub-line in the underground power distribution network to be monitored as Uaxir、Ubxir、UcxirI is 1,2, the.. multidot.n, i is expressed as the ith open-circuit fault power sub-line, and r is 1,2, the.. multidot.k, r is expressed as the r-th monitoring point.
Preferably, the fault power sub-line parameter detection module further comprises a short-circuit fault type line parameter detection unit, and the short-circuit fault is causedThe fault type line parameter detection unit is used for detecting external environment data and insulation resistance at each monitoring point in each section of fault power sub-line in the short-circuit fault type in the underground power distribution network to be monitored, wherein the external environment data comprises external temperature, external humidity and electric field intensity, each section of fault power sub-line in the short-circuit fault type is marked as each short-circuit fault power sub-line, the external temperature, the external humidity and the electric field intensity at each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored are counted, and the external temperature, the external humidity and the electric field intensity at each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored are respectively marked as w1yjr、w2yjr、w3yjrJ is 1,2, and m, j is represented as the jth short-circuit fault power sub-circuit; meanwhile, the insulation resistance of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored is counted, and the insulation resistance of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored is marked as Ryjr。
Preferably, the determining, by the fault power sub-line parameter analysis module, a fault monitoring point corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored specifically includes:
the effective value U of the three-phase voltage at each monitoring point in each broken circuit fault power sub-circuit in the underground power distribution network to be monitoredaxir、Ubxir、UcxirSubstituting the three-phase voltage unbalance calculation formula to obtain the three-phase voltage unbalance psi corresponding to each monitoring point in each broken fault power sub-circuit in the underground power distribution network to be monitoredir；
And comparing the three-phase voltage unbalance degrees corresponding to each monitoring point in each broken fault power sub-circuit in the underground distribution network to be monitored with a preset standard three-phase voltage unbalance degree threshold, if the three-phase voltage unbalance degree corresponding to a certain monitoring point in a certain broken fault power sub-circuit in the underground distribution network to be monitored is greater than the preset standard three-phase voltage unbalance degree threshold, determining that the monitoring point in the broken fault power sub-circuit is a broken fault monitoring point, and counting the arrangement positions of each broken fault monitoring point in each broken fault power sub-circuit in the underground distribution network to be monitored.
Preferably, the fault power sub-line parameter analysis module determines a fault monitoring point corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, and specifically includes:
the outside temperature w of each monitoring point in each short-circuit fault power sub-line in the underground distribution network to be monitored1yjrOutside humidity w2yjrElectric field intensity w3yjrAnd insulation resistance RyjrSubstituting the insulation performance influence coefficient into an insulation performance influence coefficient calculation formula to obtain the insulation performance influence coefficient omega at each monitoring point in each short-circuit fault power sub-line in the underground distribution network to be monitoredjr；
Comparing the insulation performance influence coefficient of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored with the insulation performance influence coefficient threshold corresponding to the preset safety power line, if the insulation performance influence coefficient of a certain monitoring point in a certain short-circuit fault power sub-line in the underground power distribution network to be monitored is smaller than the insulation performance influence coefficient threshold corresponding to the preset safety power line, determining the monitoring point in the short-circuit fault power sub-line as a short-circuit fault monitoring point, and counting the layout positions of each short-circuit fault monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored.
Preferably, the fault power sub-line early warning processing module specifically includes:
the method comprises the steps of obtaining the line types of each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored according to the layout positions of each open-circuit fault monitoring point in each open-circuit fault power sub-line and each short-circuit fault monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored, wherein the line types comprise main lines and branch lines, screening and analyzing the early warning levels corresponding to each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored, and processing the corresponding early warning levels.
Compared with the prior art, the invention has the beneficial effects that:
according to the power distribution network line fault online monitoring and early warning management system based on power grid informatization, provided by the invention, the endpoint currents of all sections of power sub-lines in the underground power distribution network to be monitored are detected, the endpoint current difference values of all sections of power sub-lines in the underground power distribution network to be monitored are obtained through comparison, all sections of fault power sub-lines in the underground power distribution network to be monitored are screened, and the fault types of all sections of fault power sub-lines in the underground power distribution network to be monitored are analyzed, so that the problems of inconsistent knowledge reserves, inconsistent experience abilities and inconsistent reference standards of personnel are effectively avoided, the line fault types can be accurately and effectively analyzed, the underground power distribution network line faults are further processed in a targeted manner, and the power supply reliability of the underground power distribution network is improved to the greatest extent.
According to the power grid informatization-based power distribution network line fault online monitoring and early warning management system, relevant parameters of each monitoring point in each section of fault power sub-line in each fault type in an underground power distribution network to be monitored are detected, so that fault monitoring points corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored are determined, and corresponding early warning level processing is performed according to the line type corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, so that the fault removing efficiency of the power line is improved, the time for finding faults and repairing the faults in the later period is shortened, the safe power supply of the underground power distribution network is effectively guaranteed, the large economic loss of a city is avoided, and the domestic power consumption requirements of urban residents are further met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a system module connection diagram of the present invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention provides a power distribution network line fault online monitoring and early warning management system based on power grid informatization, which comprises an underground power distribution network line dividing module, a line endpoint current detection module, a fault power sub-line screening and analyzing module, a fault power sub-line parameter detection module, a fault power sub-line parameter analyzing module and a fault power sub-line early warning processing module.
The underground power distribution network line dividing module is respectively connected with the line endpoint current detection module and the fault power sub-line parameter detection module, the fault power sub-line screening analysis module is respectively connected with the line endpoint current detection module and the fault power sub-line parameter detection module, and the fault power sub-line parameter analysis module is respectively connected with the fault power sub-line parameter detection module and the fault power sub-line early warning processing module.
The underground distribution network line dividing module is used for dividing the power line in the underground distribution network to be monitored into each section of power sub-line and distributing monitoring points on each section of power sub-line in the underground distribution network to be monitored.
In a possible design, the underground distribution network line division module specifically includes:
dividing an electric power line in the underground power distribution network to be monitored into all sections of electric power sub-lines according to a line equidistant dividing mode, numbering all sections of electric power sub-lines in the underground power distribution network to be monitored, simultaneously respectively arranging a plurality of monitoring points in all sections of electric power sub-lines in the underground power distribution network to be monitored according to an equidistant arrangement mode, positioning the arrangement positions of all monitoring points in all sections of electric power sub-lines in the underground power distribution network to be monitored, and numbering all monitoring points in all sections of electric power sub-lines in the underground power distribution network to be monitored.
The line endpoint current detection module is used for detecting endpoint currents of all sections of power sub-lines in the underground power distribution network to be monitored, and comparing to obtain an endpoint current difference value of all sections of power sub-lines in the underground power distribution network to be monitored.
In one possible design, the obtaining manner of the terminal current difference value of each section of the power sub-line in the underground power distribution network to be monitored in the line terminal current detection module is as follows:
the method comprises the steps of detecting the initial end current and the terminal end current of each section of power sub-line in the underground power distribution network to be monitored in real time through a current sensor, comparing the initial end current and the terminal end current of each section of power sub-line in the underground power distribution network to be monitored with the preset rated current of the power line in the underground power distribution network respectively, and obtaining the initial end current difference value and the terminal end current difference value of each section of power sub-line in the underground power distribution network to be monitored.
The fault power sub-line screening and analyzing module is used for screening fault power sub-lines in each section of the underground power distribution network to be monitored according to the endpoint current difference value of each section of the power sub-line in the underground power distribution network to be monitored, and analyzing the fault types of each section of the fault power sub-line in the underground power distribution network to be monitored.
In a possible design, the specific screening and analyzing manner in the faulty power sub-line screening and analyzing module is as follows:
comparing the initial end current difference and the terminal current difference of each section of power sub-line in the underground distribution network to be monitored with a preset allowable current error value respectively according to the end point current difference of each section of power sub-line in the underground distribution network to be monitored, if the initial end current difference or the terminal current difference of a certain section of power sub-line in the underground distribution network to be monitored is greater than the preset allowable current error value, judging that the section of power sub-line in the underground distribution network to be monitored has an abnormal fault, screening and counting each section of power sub-line with the abnormal fault in the underground distribution network to be detected, marking as each section of fault power sub-line in the underground distribution network to be detected, analyzing the fault type of each section of fault power sub-line in the underground distribution network to be monitored according to the end point current difference of each section of fault power sub-line in the underground distribution network to be detected, counting each section of fault power sub-line in each fault type in the underground distribution network to be monitored, wherein each fault type is an open circuit fault type and a short circuit fault type.
It should be noted that, in the above, analyzing the fault type of each section of faulty power sub-line in the underground power distribution network to be monitored according to the endpoint current difference of each section of faulty power sub-line in the underground power distribution network to be detected includes:
if the initial end current difference or the terminal end current difference of a certain section of fault power sub-line in the underground power distribution network to be detected is equal to the preset rated current of the power line in the underground power distribution network, indicating that the fault type of the section of fault power sub-line in the underground power distribution network to be detected is an open circuit fault type; if the initial end current difference or the terminal end current difference of a certain section of fault power sub-line in the underground power distribution network to be detected is far larger than the preset rated current of the power line in the underground power distribution network, the fault type of the section of fault power sub-line in the underground power distribution network to be detected is a short-circuit fault type.
In the embodiment, the invention detects the endpoint currents of all sections of power sub-lines in the underground power distribution network to be monitored, obtains the endpoint current difference value of all sections of power sub-lines in the underground power distribution network to be monitored through comparison, screens all sections of fault power sub-lines in the underground power distribution network to be monitored, and analyzes the fault type of all sections of fault power sub-lines in the underground power distribution network to be monitored, thereby effectively avoiding the problems of inconsistent knowledge reserves, inconsistent experience capability and inconsistent reference standards, ensuring that the line fault type can be accurately and effectively analyzed, further realizing the targeted processing of the line fault of the underground power distribution network, and improving the power supply reliability of the underground power distribution network to the greatest extent.
The fault power sub-line parameter detection module is used for detecting relevant parameters of each monitoring point in each section of fault power sub-line of each fault type in the underground power distribution network to be monitored.
In a possible arrangementThe fault power sub-line parameter detection module comprises an open-circuit fault type line parameter detection unit, the open-circuit fault type line parameter detection unit is used for detecting three-phase voltages at monitoring points in each section of fault power sub-line in an open-circuit fault type in the underground power distribution network to be monitored through a voltage sensor, recording each section of fault power sub-line in the open-circuit fault type as each open-circuit fault power sub-line, counting effective values of the three-phase voltages at each monitoring point in each open-circuit fault power sub-line in the underground power distribution network to be monitored, and recording the effective values of the three-phase voltages at each monitoring point in each open-circuit fault power sub-line in the underground power distribution network to be monitored as U respectivelyaxir、Ubxir、UcxirI is 1,2, the.. multidot.n, i is expressed as the ith open-circuit fault power sub-line, and r is 1,2, the.. multidot.k, r is expressed as the r-th monitoring point.
In one possible design, the fault power sub-line parameter detection module further comprises a short-circuit fault type line parameter detection unit, the short-circuit fault type line parameter detection unit is used for detecting external environment data and insulation resistance at each monitoring point in each section of fault power sub-line in the short-circuit fault type in the underground power distribution network to be monitored, wherein the external environment data comprises external temperature, external humidity and electric field intensity, each section of fault power sub-line in the short-circuit fault type is marked as each short-circuit fault power sub-line, the external temperature, the external humidity and the electric field intensity at each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored are counted, and the external temperature, the external humidity and the electric field intensity at each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored are respectively marked as w1yjr、w2yjr、w3yjrJ is 1,2, and m, j is represented as the jth short-circuit fault power sub-circuit; meanwhile, the insulation resistance of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored is counted, and the insulation resistance of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored is marked as Ryjr。
It should be noted that the short-circuit fault type line parameter detection unit detects the temperature of each monitoring point in each section of fault power sub-line in the short-circuit fault type in the underground power distribution network to be monitored through a temperature sensor, the short-circuit fault type line parameter detection unit detects the humidity of each monitoring point in each section of fault power sub-line in the short-circuit fault type in the underground power distribution network to be monitored through a humidity sensor, and the short-circuit fault type line parameter detection unit detects the electric field intensity of each monitoring point in each section of fault power sub-line in the short-circuit fault type in the underground power distribution network to be monitored through an electric field intensity detector.
The fault power sub-line parameter analysis module is used for analyzing relevant parameters of each monitoring point in each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, and determining fault monitoring points corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored.
In a possible design, the determining, by the failure power sub-line parameter analysis module, a failure monitoring point corresponding to each section of failure power sub-line in each failure type in the underground power distribution network to be monitored specifically includes:
the effective value U of the three-phase voltage at each monitoring point in each broken circuit fault power sub-circuit in the underground power distribution network to be monitoredaxir、Ubxir、UcxirSubstituting the three-phase voltage unbalance calculation formula to obtain the three-phase voltage unbalance psi corresponding to each monitoring point in each broken fault power sub-circuit in the underground power distribution network to be monitoredir；
And comparing the three-phase voltage unbalance degree corresponding to each monitoring point in each broken fault power sub-circuit in the underground power distribution network to be monitored with a preset standard three-phase voltage unbalance degree threshold, if the three-phase voltage unbalance degree corresponding to a certain monitoring point in a certain broken fault power sub-circuit in the underground power distribution network to be monitored is greater than the preset standard three-phase voltage unbalance degree threshold, determining that the monitoring point in the broken fault power sub-circuit is a broken fault monitoring point, and counting the arrangement positions of each broken fault monitoring point in each broken fault power sub-circuit in the underground power distribution network to be monitored.
It should be noted that the formula for calculating the unbalance degree of the three-phase voltage is
Wherein psiirAnd expressing the unbalance degree of the three-phase voltage corresponding to the r-th monitoring point in the ith broken fault power sub-circuit in the underground power distribution network to be monitored.
In a possible design, the determining, by the failure power sub-line parameter analysis module, a failure monitoring point corresponding to each section of failure power sub-line in each failure type in the underground power distribution network to be monitored specifically includes:
the outside temperature w of each monitoring point in each short-circuit fault power sub-line in the underground distribution network to be monitored1yjrOutside humidity w2yjrElectric field intensity w3yjrAnd insulation resistance RyjrSubstituting the insulation performance influence coefficient into an insulation performance influence coefficient calculation formula to obtain the insulation performance influence coefficient omega at each monitoring point in each short-circuit fault power sub-line in the underground distribution network to be monitoredjr；
Comparing the insulation performance influence coefficient of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored with the insulation performance influence coefficient threshold corresponding to the preset safety power line, if the insulation performance influence coefficient of a certain monitoring point in a certain short-circuit fault power sub-line in the underground power distribution network to be monitored is smaller than the insulation performance influence coefficient threshold corresponding to the preset safety power line, determining the monitoring point in the short-circuit fault power sub-line as a short-circuit fault monitoring point, and counting the layout positions of each short-circuit fault monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored.
It should be noted that the insulation performance influence coefficient calculation formula is
Wherein omegajrExpressed as the number one in the underground distribution network to be monitoredInfluence coefficient of insulation performance at the R-th monitoring point in j short-circuit fault power sub-lines, RSign boardExpressed as a predetermined standard insulation resistance of the power line in the underground distribution network, e is expressed as a constant, lambda1、λ2、λ3Respectively expressed as the weight index, lambda, of the influence of preset external temperature, external humidity and electric field strength on the insulation performance of the power line1+λ2+λ3＝1，w1ySign board、w2ySign board、w3ySign boardRespectively expressed as the standard outside temperature, the standard outside humidity and the standard electric field intensity, delta w, corresponding to the safety electric power circuit in the preset underground distribution network1yAllow for、Δw2yAllow for、Δw3yAllow forRespectively expressed as a preset allowable error value of the outside temperature, an allowable error value of the outside humidity and an allowable error value of the electric field intensity.
The failure power sub-line early warning processing module: and the method is used for processing corresponding early warning levels according to the line types corresponding to all sections of fault power sub-lines in all fault types in the underground power distribution network to be monitored.
In a possible design, the fault power sub-line warning processing module includes:
the method comprises the steps of obtaining the line types of each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored according to the arrangement position of each open-circuit fault monitoring point in each open-circuit fault power sub-line in the underground power distribution network to be monitored and the arrangement position of each short-circuit fault monitoring point in each short-circuit fault power sub-line, wherein the line types comprise a main line and a branch line, screening and analyzing the early warning grades corresponding to each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored, and processing corresponding to the early warning grades.
It should be noted that, in the above, the screening and analyzing of the early warning levels corresponding to each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored, and the processing corresponding to the early warning levels specifically include:
screening various broken fault power sub-circuits belonging to main line types and branch line types in the underground power distribution network to be monitored, respectively marking the broken fault main lines and the broken fault branch lines, acquiring main lines correspondingly connected with the broken fault branch lines in the underground power distribution network to be monitored, and sending a first-level early warning prompt if the broken fault branch lines exist in the branch lines correspondingly connected with a certain broken fault main line in the underground power distribution network to be monitored, and informing a power distribution network line maintenance worker to perform first-level early warning processing on the arrangement positions of broken fault monitoring points in the broken fault main line; if branch lines corresponding to and connected with a certain broken fault trunk line in the underground power distribution network to be monitored do not have broken fault branch lines, sending out a secondary early warning prompt, and informing a power distribution network line maintenance worker to carry out secondary early warning processing on the layout position of each broken fault monitoring point in the broken fault trunk line; if the main line correspondingly connected with a certain broken fault branch line in the underground power distribution network to be monitored is not the broken fault main line, sending a three-level early warning prompt and informing a power distribution network line maintenance worker to carry out three-level early warning treatment on the arrangement position of each broken fault monitoring point in the broken fault branch line;
screening short-circuit fault power sub-circuits belonging to main line types and branch line types in an underground power distribution network to be monitored, respectively marking the short-circuit fault main lines and the short-circuit fault branch lines, acquiring main lines correspondingly connected with the short-circuit fault branch lines in the underground power distribution network to be monitored, and sending a primary early warning prompt if a short-circuit fault branch line exists in the branch line correspondingly connected with a certain short-circuit fault main line in the underground power distribution network to be monitored, and informing a power distribution network line maintenance worker to perform primary early warning processing on the layout position of each short-circuit fault monitoring point in the short-circuit fault main line; if no short-circuit fault branch line exists in the branch line correspondingly connected with a short-circuit fault main line in the underground power distribution network to be monitored, sending a secondary early warning prompt to inform a power distribution network line maintenance worker to carry out secondary early warning processing on the layout position of each short-circuit fault monitoring point in the short-circuit fault main line; and if the main line correspondingly connected with a certain short-circuit fault branch line in the underground power distribution network to be monitored is not the short-circuit fault main line, sending a third-level early warning prompt and informing a power distribution network line maintenance worker to carry out third-level early warning treatment on the layout position of each short-circuit fault monitoring point in the short-circuit fault branch line.
In the embodiment, relevant parameters of each monitoring point in each section of fault power sub-circuit in each fault type in the underground power distribution network to be monitored are detected, so that the fault monitoring points corresponding to each section of fault power sub-circuit in each fault type in the underground power distribution network to be monitored are determined, and corresponding early warning level processing is performed according to the line type corresponding to each section of fault power sub-circuit in each fault type in the underground power distribution network to be monitored, so that the fault removing efficiency of the power line is improved, the time for finding the fault and repairing the fault in the later period is shortened, the safe power supply of the underground power distribution network is effectively guaranteed, the large economic loss caused to a city is avoided, and the domestic power consumption requirements of urban residents are further met.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (9)
1. The utility model provides a distribution network line fault on-line monitoring early warning management system based on electric wire netting informatization which characterized in that includes:
underground distribution network line divides module: the monitoring system is used for dividing the power line in the underground power distribution network to be monitored into each section of power sub-line and distributing monitoring points on each section of power sub-line in the underground power distribution network to be monitored;
line endpoint current detection module: the system is used for detecting the endpoint current of each section of power sub-line in the underground power distribution network to be monitored, and comparing to obtain the endpoint current difference of each section of power sub-line in the underground power distribution network to be monitored;
the fault power sub-line screening and analyzing module comprises: the fault detection device is used for screening fault power sub-lines of all sections in the underground power distribution network to be monitored according to the endpoint current difference of all sections in the underground power distribution network to be monitored, and analyzing the fault types of all sections of fault power sub-lines in the underground power distribution network to be monitored;
the fault power sub-line parameter detection module: the method is used for detecting relevant parameters of each monitoring point in each section of fault power sub-line of each fault type in the underground power distribution network to be monitored;
the fault power sub-line parameter analysis module: the monitoring system is used for analyzing relevant parameters of each monitoring point in each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, and determining fault monitoring points corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored;
the failure power sub-line early warning processing module: and the method is used for processing corresponding early warning levels according to the line types corresponding to all sections of fault power sub-lines in all fault types in the underground power distribution network to be monitored.
2. The power grid informatization-based power distribution network line fault online monitoring and early warning management system is characterized in that: the underground power distribution network line division module specifically comprises the following steps:
dividing a power line in the underground power distribution network to be monitored into all sections of power sub-lines according to a line equidistant dividing mode, numbering all sections of power sub-lines in the underground power distribution network to be monitored, simultaneously respectively arranging a plurality of monitoring points in all sections of power sub-lines in the underground power distribution network to be monitored according to an equidistant arrangement mode, positioning the arrangement positions of all monitoring points in all sections of power sub-lines in the underground power distribution network to be monitored, and numbering all monitoring points in all sections of power sub-lines in the underground power distribution network to be monitored.
3. The power grid informatization-based power distribution network line fault online monitoring and early warning management system is characterized in that: the method for obtaining the endpoint current difference value of each section of power sub-circuit in the underground power distribution network to be monitored in the circuit endpoint current detection module comprises the following steps:
the method comprises the steps of detecting the initial end current and the terminal end current of each section of power sub-line in the underground power distribution network to be monitored in real time through a current sensor, comparing the initial end current and the terminal end current of each section of power sub-line in the underground power distribution network to be monitored with the preset rated current of the power line in the underground power distribution network respectively, and obtaining the initial end current difference value and the terminal end current difference value of each section of power sub-line in the underground power distribution network to be monitored.
4. The power distribution network line fault online monitoring and early warning management system based on power grid informatization is characterized in that: the corresponding specific screening and analyzing mode in the fault power sub-line screening and analyzing module is as follows:
comparing the initial end current difference and the terminal current difference of each section of power sub-line in the underground power distribution network to be monitored with a preset allowable current error value respectively according to the end point current difference of each section of power sub-line in the underground power distribution network to be monitored, if the initial end current difference or the terminal current difference of a certain section of power sub-line in the underground power distribution network to be monitored is greater than the preset allowable current error value, judging that the section of power sub-line in the underground power distribution network to be monitored has an abnormal fault, screening and counting the sections of power sub-line with the abnormal fault in the underground power distribution network to be detected, marking as each section of fault power sub-line in the underground power distribution network to be detected, analyzing the fault type of each section of fault power sub-line in the underground power distribution network to be monitored according to the end point current difference of each section of fault power sub-line in the underground power distribution network to be detected, counting each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, wherein each fault type is an open circuit fault type and a short circuit fault type.
5. The power distribution network line fault online monitoring and early warning management system based on power grid informatization is characterized in that: the fault power sub-line parameter detection module comprises an open-circuit fault type line parameter detection unitThe open-circuit fault type line parameter detection unit is used for detecting three-phase voltage at each monitoring point in each section of fault power sub-line circuit in the open-circuit fault type in the underground power distribution network to be monitored, recording each section of fault power sub-line circuit in the open-circuit fault type as each open-circuit fault power sub-line circuit, counting effective values of the three-phase voltage at each monitoring point in each open-circuit fault power sub-line circuit in the underground power distribution network to be monitored, and recording the effective values of the three-phase voltage at each monitoring point in each open-circuit fault power sub-line circuit in the underground power distribution network to be monitored as U respectivelyaxir、Ubxir、UcxirI is 1,2, the.. multidot.n, i is expressed as the ith open-circuit fault power sub-line, and r is 1,2, the.. multidot.k, r is expressed as the r-th monitoring point.
6. The power grid informatization-based power distribution network line fault online monitoring and early warning management system is characterized in that: the fault power sub-line parameter detection module further comprises a short-circuit fault type line parameter detection unit, the short-circuit fault type line parameter detection unit is used for detecting external environment data and insulation resistance of each monitoring point in each section of fault power sub-line in the short-circuit fault type in the underground power distribution network to be monitored, the external environment data comprise external temperature, external humidity and electric field intensity, each section of fault power sub-line in the short-circuit fault type is marked as each short-circuit fault power sub-line, the external temperature, the external humidity and the electric field intensity of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored are counted, and the external temperature, the external humidity and the electric field intensity of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored are respectively marked as w1yjr、w2yjr、w3yjrJ is 1,2, and m, j is represented as the jth short-circuit fault power sub-circuit; meanwhile, the insulation resistance of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored is counted, and the insulation resistance of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored is marked as Ryjr。
7. The power distribution network line fault online monitoring and early warning management system based on power grid informatization is characterized in that: the method for monitoring the faults of the underground power distribution network comprises the following steps of determining fault monitoring points corresponding to all sections of fault power sub-circuits of all fault types in the underground power distribution network to be monitored by the fault power sub-circuit parameter analysis module, and specifically comprises the following steps:
the effective value U of the three-phase voltage at each monitoring point in each broken circuit fault power sub-circuit in the underground power distribution network to be monitoredaxir、Ubxir、UcxirSubstituting the three-phase voltage unbalance calculation formula to obtain the three-phase voltage unbalance psi corresponding to each monitoring point in each broken fault power sub-circuit in the underground power distribution network to be monitoredir；
And comparing the three-phase voltage unbalance degrees corresponding to each monitoring point in each broken fault power sub-circuit in the underground distribution network to be monitored with a preset standard three-phase voltage unbalance degree threshold, if the three-phase voltage unbalance degree corresponding to a certain monitoring point in a certain broken fault power sub-circuit in the underground distribution network to be monitored is greater than the preset standard three-phase voltage unbalance degree threshold, determining that the monitoring point in the broken fault power sub-circuit is a broken fault monitoring point, and counting the arrangement positions of each broken fault monitoring point in each broken fault power sub-circuit in the underground distribution network to be monitored.
8. The power distribution network line fault online monitoring and early warning management system based on power grid informatization is characterized in that: the fault power sub-line parameter analysis module determines fault monitoring points corresponding to each section of fault power sub-line in each fault type in the underground power distribution network to be monitored, and the fault power sub-line parameter analysis module specifically comprises the following steps:
the outside temperature w of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored1yjrOutside humidity w2yjrElectric field intensity w3yjrAnd insulation resistance RyjrSubstituting the calculation formula of the influence coefficient of the insulation performance to obtain the short circuit in the underground distribution network to be monitoredInfluence coefficient omega of insulating property at each monitoring point in barrier power sub-linejr；
Comparing the insulation performance influence coefficient of each monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored with the insulation performance influence coefficient threshold corresponding to the preset safety power line, if the insulation performance influence coefficient of a certain monitoring point in a certain short-circuit fault power sub-line in the underground power distribution network to be monitored is smaller than the insulation performance influence coefficient threshold corresponding to the preset safety power line, determining the monitoring point in the short-circuit fault power sub-line as a short-circuit fault monitoring point, and counting the layout positions of each short-circuit fault monitoring point in each short-circuit fault power sub-line in the underground power distribution network to be monitored.
9. The power grid informatization-based power distribution network line fault online monitoring and early warning management system is characterized in that: the fault power sub-line early warning processing module comprises the following corresponding specific details:
the method comprises the steps of obtaining the line types of each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored according to the arrangement position of each open-circuit fault monitoring point in each open-circuit fault power sub-line in the underground power distribution network to be monitored and the arrangement position of each short-circuit fault monitoring point in each short-circuit fault power sub-line, wherein the line types comprise a main line and a branch line, screening and analyzing the early warning grades corresponding to each open-circuit fault power sub-line and each short-circuit fault power sub-line in the underground power distribution network to be monitored, and processing corresponding to the early warning grades.
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