CN114611966B - Intelligent quantitative evaluation method for power transmission and transformation operation safety of smart power grid power system - Google Patents
Intelligent quantitative evaluation method for power transmission and transformation operation safety of smart power grid power system Download PDFInfo
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Abstract
The invention discloses an intelligent assessment method for power transmission and transformation operation safety quantification of a smart grid power system. The intelligent power transmission and transformation operation safety quantitative evaluation method for the smart power grid power system comprises the following steps: extracting basic information corresponding to the associated power transmission line; dividing the associated transmission line into transmission line sections according to a preset interval, and detecting line state parameters and power parameters corresponding to the transmission line sections; extracting historical meteorological information corresponding to the position of the area where the associated power transmission line is located; processing and analyzing the line state parameters, the electric power parameters and the historical meteorological information corresponding to the associated power transmission lines, and performing power transmission and transformation operation safety assessment on the power system to be monitored; the problem of the concrete general nature of current aassessment mode is solved, realized the pertinence aassessment to overhead transmission line operation safety, ensured accurate nature, rationality and the referential of electric power system power transmission and transformation operation safety assessment result.
Description
Technical Field
The invention belongs to the field of power grid operation management, and relates to an intelligent power grid power system power transmission and transformation operation safety quantitative evaluation method.
Background
In recent years, the demand of people for electric energy in production and life is continuously increased, which also puts higher requirements on the safe and stable operation of an electric power system, the overhead transmission line is used as a common mode of long-distance power transmission and transformation in the electric power system, the operation safety and the operation stability of the overhead transmission line directly determine the safety and the stability of the power transmission and transformation operation of the electric power system to a great extent, and in order to reduce the potential safety hazard in the power transmission and transformation operation process of the electric power system, the power transmission and transformation operation safety corresponding to the overhead transmission line of the electric power system needs to be evaluated.
At present, the safety assessment of the power transmission and transformation operation of the power system is mainly based on two modes, one mode is based on benchmark risk assessment, the other mode is based on risk assessment, the risk is comprehensively assessed by analyzing the risk hazard and the risk occurrence probability, and then the risk level is determined, and obviously, the two modes have the following problems:
1. the overhead transmission line is used as a main link for connecting a transmission system and a distribution system in a power system, and the importance of the overhead transmission line is self-evident, the current modes for evaluating the transmission and transformation operation safety of the power system are general evaluation, the overhead transmission line is not subjected to targeted evaluation, the accuracy of the transmission and transformation operation safety evaluation result of the power system cannot be guaranteed, meanwhile, the two current modes need huge data bases, the calculation workload is large, and large errors are easy to generate in the evaluation process;
2. the two current evaluation modes are based on the probability and the influence degree corresponding to the risk event of the power system, the general operation safety evaluation of the power system is mainly realized, the operation safety state of the power system in the associated power transmission line cannot be highlighted, and then the accurate and efficient analysis of the power transmission line cannot be realized, and meanwhile, the two current modes also cannot provide reliable and powerful data reference for the development of the power system in the operation and maintenance work of the overhead power transmission line.
Disclosure of Invention
In view of the above, in order to solve the problems in the background art, an intelligent assessment method for the power transmission and transformation operation safety quantification of the smart grid power system is provided, so that the intelligent assessment of the power transmission and transformation operation safety of the power system is realized;
the purpose of the invention can be realized by the following technical scheme:
the invention provides a smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method, which comprises the following steps:
s1, acquiring a related power transmission line corresponding to a power system to be monitored, and extracting basic information corresponding to the related power transmission line;
s2, dividing the associated power transmission line into power transmission line sections according to a preset interval, and detecting line states corresponding to the power transmission line sections in the associated power transmission line;
wherein, step S2 specifically comprises the following steps:
s21, counting each electric pole corresponding to each electric transmission line section in the associated electric transmission line, and detecting the state corresponding to each electric pole;
s22, counting each corresponding lead and each pull wire in each transmission line section in the associated transmission line, and detecting the state corresponding to each lead and each pull wire;
step S23, counting each corresponding line element in each transmission line section in the associated transmission line, obtaining the type corresponding to each line element, and further detecting the state corresponding to each line element in each type;
s3, detecting the electric power parameters corresponding to the associated electric transmission lines to obtain the numerical values corresponding to the electric power parameters in the associated electric transmission lines;
s4, performing primary processing on each line state corresponding to each transmission line section in the associated transmission line and each power parameter corresponding to each transmission line section in the associated transmission line;
s5, extracting the position of the area where the associated power transmission line is located from the basic information corresponding to the associated power transmission line, and extracting historical meteorological information corresponding to the position of the area where the associated power transmission line is located from an area meteorological database, wherein the historical meteorological information comprises the frequency of occurrence of historical severe weather and the corresponding severe grade of the historical severe weather each time;
s6, further analyzing the line state corresponding to the associated power transmission line, the primary processing result of each power parameter corresponding to the associated power transmission line and historical meteorological information corresponding to the area position of the associated power transmission line, and evaluating the power transmission and transformation operation safety of the power system to be monitored;
and S7, transmitting the evaluation result of the power transmission and transformation operation safety of the power system to be monitored to operation and maintenance supervision personnel corresponding to the power system to be monitored.
As a preferred scheme, the basic information corresponding to the associated power transmission line includes a region position to which the associated power transmission line corresponds, insulator string information, hardware fitting information, and transformer information included in the associated power transmission line.
As a preferred scheme, the insulator string information included in the associated transmission line is the number of insulator strings and the number of insulators included in each insulator string, the hardware fitting information included in the associated transmission line is the number of hardware fittings, and the transformer information included in the associated transmission line is the number of transformers.
Preferably, the specific implementation process of detecting the state corresponding to each electric pole in step S21 includes the following steps:
numbering each transmission line section in the associated transmission lines, and sequentially marking the transmission line sections as 1,2,. J.i,. N;
marking each electric pole in each transmission line section in the associated transmission line as G i r R is a pole number, r =1,2,... K, i is a transmission line section number, i =1,2,... N;
and acquiring images of the electric poles by using the first cameras at the positions of the electric poles in the electric transmission line sections in the associated electric transmission line, acquiring the images corresponding to the electric poles in the electric transmission line sections in the associated electric transmission line, and acquiring the corresponding states of the electric poles in the electric transmission line sections in the associated electric transmission line.
Preferably, the specific detection process of the state corresponding to each lead and each pull wire in step S22 is as follows: marking each corresponding lead in each transmission line section in the associated transmission line as X according to each corresponding lead and each corresponding pull wire in each transmission line section in the associated transmission line i t Marking each corresponding stay wire in each transmission line section in the associated transmission line as L i d T represents a lead number, t =1,2, a.
As a preferable scheme, the type corresponding to each line element in the step S23 specifically includes an insulator string and a hardware, and the specific state detection process includes the following steps:
comparing the types of the corresponding line elements in each transmission line section in the associated transmission line with each other, and respectively screening out the number of the corresponding insulator strings and the number of the corresponding hardware fittings in each transmission line section in the associated transmission line to obtain the corresponding insulator strings and the corresponding hardware fittings in each transmission line section in the associated transmission line;
marking each insulator string and each hardware fitting corresponding to each transmission line section in the associated transmission line as J i s And Y i u S is an insulator string number, s =1,2,.. G, u is an hardware number, and u =1,2,... V;
detecting the surface equivalent salt-attached density of the associated transmission line by using an insulator salt density tester carried by each insulator string in each transmission line section in the associated transmission line so as to obtain the surface equivalent salt-attached density corresponding to each insulator string in each transmission line section in the associated transmission line, and simultaneously collecting the insulation resistance of each insulator in the insulator string by using an insulation resistance instrument carried by each insulator string in each transmission line section in the associated transmission line so as to obtain the insulation resistance corresponding to each insulator in each insulator string in each transmission line section in the associated transmission line;
and detecting the temperature of each hardware in each transmission line section in the associated transmission line according to a preset acquisition time interval by using a temperature sensor carried by each hardware in each transmission line section in the associated transmission line, and acquiring the temperature corresponding to each hardware in each acquisition time interval in each transmission line section in the associated transmission line.
As a preferred scheme, each power parameter corresponding to the associated power transmission line in step S3 is a conductor power parameter and a transformer power parameter, and the specific detection process is as follows:
selecting power detection points of all the wires in all the transmission line sections in the associated transmission line according to the corresponding wires in all the transmission line sections in the associated transmission line, laying power detection equipment at the selected power detection points, detecting power parameters of all the wires by using the power detection equipment in all the power detection point positions of all the wires in all the transmission line sections in the associated transmission line according to preset detection time points, and acquiring power parameters of all the wires corresponding to all the detection time points at all the power detection point positions of all the wires in all the transmission line sections in the associated transmission line, wherein the power parameters of the wires comprise wire operating current and wire operating voltage;
extracting the corresponding transformers in each transmission line section in the associated transmission line according to the number of the corresponding transformers in the associated transmission line and the corresponding positions of the transformers, detecting discharge signals of the ultrahigh frequency sensors carried by the transformers in each transmission line section in the associated transmission line according to a preset acquisition time period, and acquiring the discharge signal values of the transformers in each transmission line section in the associated transmission line corresponding to each acquisition time period.
As a preferred scheme, the specific processing procedure of performing preliminary processing on each line state corresponding to each transmission line segment in the associated transmission line and each power parameter corresponding to each transmission line segment in the associated transmission line in step S4 is as follows:
firstly, according to each line state corresponding to each transmission line section in the associated transmission line, performing state confirmation on each line state to obtain state types corresponding to each electric pole, each lead, each pull wire and each line element in each type in each transmission line section in the associated transmission line;
secondly, according to the running current and running voltage of each power detection point on each conductor in each transmission line section in the associated transmission line corresponding to each detection time point, calculating the average running current and average running voltage corresponding to each conductor in each transmission line section in the associated transmission line by using an average value calculation method, and respectively expressing the average running current and average running voltage as V i t And A i t Simultaneously screening out the maximum discharge signal value corresponding to each transformer in each transmission line section in the associated line according to the discharge signal value corresponding to each transformer in each acquisition time period in each transmission line section in the associated transmission line, and marking as B i j J denotes the transformer number, j =1,2.
As a preferred scheme, the specific analysis process for further analyzing the line state corresponding to the associated power transmission line, the preliminary processing result of each power parameter corresponding to the associated power transmission line, and the historical meteorological information corresponding to the area location where the associated power transmission line is located in step S6 includes the following steps:
acquiring state types corresponding to electric poles, wires, pull wires and line elements in transmission line sections in the associated transmission line, recording the state types as external analysis elements, setting safety influence weights of the external analysis elements, counting comprehensive safety indexes of the external analysis elements of the associated transmission line, and recording the comprehensive safety indexes as YZ;
obtaining the corresponding numerical value of each power parameter in the associated power transmission line, recording each power parameter as an internal analysis element, and substituting the maximum discharge signal value corresponding to each transformer in each power transmission line section in the associated line, the average running current and the average running voltage corresponding to each lead in each power transmission line section in the associated line into a calculation formula
Obtaining safety indexes of internal analysis elements of the associated power transmission line, wherein sigma 1 and sigma 2 are preset weighted values, delta V and delta A respectively represent a preset allowable voltage difference value and a preset allowable current difference value, B ' represents a preset transformer safety discharge signal value, and V ' and A ' are respectively preset standard operating voltage and standard operating current of a lead;
acquiring historical severe weather occurrence times of the area where the associated power transmission line is located and severe grades corresponding to severe weather occurrence times, recording the historical severe weather occurrence times of the area where the associated power transmission line is located and the severe grades corresponding to severe weather occurrence times as auxiliary analysis elements, calculating the safety index of the auxiliary analysis elements of the associated power transmission line by using a calculation formula, and marking the safety index as FZ;
and substituting the comprehensive safety index YZ of the external analysis element of the associated transmission line, the safety index NZ of the internal analysis element of the associated transmission line and the safety index FZ of the auxiliary analysis element of the associated transmission line into ZQ = lambda 1X YZ + lambda 1X NZ + lambda 3X FZ to obtain the comprehensive safety index of the transmission and transformation of the power system to be monitored, wherein lambda 1, lambda 2 and lambda 3 respectively represent preset coefficients, and lambda 1+ lambda 2+ lambda 3=1.
As a preferred scheme, the specific process of evaluating the power transmission and transformation operation safety of the power system to be monitored in step S6 is as follows: the method comprises the steps of obtaining a comprehensive power transmission and transformation safety index of a power system to be monitored, matching and comparing the comprehensive power transmission and transformation safety index of the power system to be monitored with safety indexes corresponding to preset safety levels, and comparing the safety levels corresponding to the power transmission and transformation of the power system to be monitored, wherein the preset safety levels comprise first-level safety, second-level safety and third-level safety, the first-level safety is greater than the second-level safety and the third-level safety is greater than the third-level safety, if the safety level corresponding to the power transmission and transformation of the power system to be monitored reaches the second level or the first level, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as safe, and if not, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as unsafe.
Compared with the prior art, the invention has the following beneficial effects: according to the intelligent assessment method for the power transmission and transformation operation safety quantification of the smart grid power system, the line states, power parameters and historical meteorological information corresponding to each power transmission line section in the associated power transmission lines are collected, and the power transmission and transformation operation safety assessment of the power system is carried out according to the collected information, so that on one hand, the problem that the current assessment mode is specific and general is solved, the targeted assessment on the operation safety of the overhead power transmission lines is realized, the accuracy of the power transmission and transformation operation safety assessment result of the power system is improved, the assessment workload of the power transmission and transformation operation safety of the power system is effectively reduced, the errors in the assessment process are reduced as much as possible, and the refined and visualized assessment on the power transmission and transformation operation safety of the power system is realized; on the other hand, the operation safety state of the power system in the associated power transmission line is effectively highlighted, the accurate and efficient analysis of the power transmission line is realized, and reliable and powerful data reference is further provided for the development of the operation and maintenance work of the power system on the overhead power transmission line to a certain extent.
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 diagram of the steps of the method of the present invention.
Detailed Description
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Referring to fig. 1, a smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method includes:
s1, acquiring a related power transmission line corresponding to a power system to be monitored, and extracting basic information corresponding to the related power transmission line;
specifically, the basic information corresponding to the associated power transmission line includes the position of the region to which the associated power transmission line corresponds, insulator string information, hardware fitting information and transformer information included in the associated power transmission line, wherein the insulator string information included in the associated power transmission line includes the number of insulator strings and the number of insulators included in each insulator string, the hardware fitting information included in the associated power transmission line includes the number of hardware fittings, the transformer information included in the associated power transmission line includes the number of transformers, an effective information basis is provided for subsequent analysis of the power system to be monitored by obtaining the basic information corresponding to the associated power transmission line, and an evaluation process of the power transmission and transformation operation safety of the power system to be monitored is promoted.
S2, dividing the associated power transmission line into power transmission line sections according to a preset interval, and detecting line states corresponding to the power transmission line sections in the associated power transmission line;
wherein, step S2 specifically includes the following steps:
step S21, counting the electric poles corresponding to each electric transmission line section in the associated electric transmission line, and detecting the corresponding states of the electric poles, wherein the specific detection process is as follows:
numbering each transmission line section in the associated transmission lines according to a preset sequence, and sequentially marking the transmission line sections as 1,2,. I,. N;
marking each electric pole in each transmission line section in the associated transmission line as G i r R is the pole number, r =1,2,.. K, i is the transmission line section number, i =1,2,......n；
and acquiring images of the electric poles by using the first cameras at the positions of the electric poles in the electric transmission line sections in the associated electric transmission line, acquiring the images corresponding to the electric poles in the electric transmission line sections in the associated electric transmission line, and acquiring the corresponding states of the electric poles in the electric transmission line sections in the associated electric transmission line.
Exemplarily, the process of obtaining the state corresponding to each electric pole in each electric transmission line segment in the associated electric transmission line is as follows: according to the image corresponding to each electric pole in each electric transmission line section in the associated electric transmission line, carrying out noise reduction and filtering processing on the image corresponding to each electric pole, carrying out crack contour extraction on the processed image of each electric pole, counting the number of cracks corresponding to each electric pole in each electric transmission line section, obtaining the contour area corresponding to each crack in each electric pole in each electric transmission line section, and further counting the comprehensive crack area corresponding to each electric pole in each electric transmission line section.
Step S22, counting the corresponding leads and the corresponding pull wires in each transmission line section in the associated transmission line, and detecting the corresponding states of the leads and the pull wires, wherein the specific detection process comprises the following steps: marking each corresponding lead in each transmission line section in the associated transmission line as X according to each corresponding lead and each corresponding pull wire in each transmission line section in the associated transmission line i t Marking each corresponding stay wire in each transmission line section in the associated transmission line as L i d T represents a lead number, t =1,2, a.
Exemplarily, obtaining a wire image and a stay wire image corresponding to each transmission line section in the associated transmission line, performing noise reduction and filtering processing on the wire images, importing each wire image in each transmission line section into a third-party website from the processed wire image corresponding to each transmission line section, obtaining an sag value corresponding to each wire in each transmission line section, and simultaneously comparing the processed stay wire image corresponding to each transmission line section with the image corresponding to each stay wire type to obtain the type corresponding to each stay wire;
in a specific embodiment, the pull string types include a full pull string, a broken pull string, a strandwire, and the like.
Step S23, counting each line element corresponding to each transmission line section in the associated transmission line, obtaining a type corresponding to each line element, and further detecting a state corresponding to each line element in each type, where the type corresponding to each line element specifically includes an insulator string and a hardware fitting, and the specific detection process of the state is: comparing the types of the corresponding line elements in each transmission line section in the associated transmission line with each other, respectively screening out the number of the corresponding insulator strings and the number of the corresponding hardware fittings in each transmission line section in the associated transmission line, and obtaining the corresponding insulator strings and the corresponding hardware fittings in each transmission line section in the associated transmission line;
marking each insulator chain and each hardware fitting corresponding to each transmission line section in the associated transmission line as J i s And Y i u S is an insulator string number, s =1,2,.. G, u is an hardware number, and u =1,2,... V;
detecting the surface salt-attached density of the insulator string carried by each insulator string in each transmission line section in the associated transmission line by using an insulator salt density tester carried by each insulator string in each transmission line section in the associated transmission line, further acquiring the surface equivalent salt-attached density corresponding to each insulator string in each transmission line section in the associated transmission line, and simultaneously acquiring the insulation resistance of each insulator in the insulator string by using an insulation resistance instrument carried by each insulator string in each transmission line section in the associated transmission line, so as to acquire the insulation resistance corresponding to each insulator in each insulator string in each transmission line section in the associated transmission line;
and detecting the temperature of each hardware in each transmission line section in the associated transmission line according to a preset acquisition time interval by using a temperature sensor carried by each hardware in each transmission line section in the associated transmission line, and acquiring the temperature corresponding to each hardware in each acquisition time interval in each transmission line section in the associated transmission line.
S3, detecting electric parameters corresponding to the associated electric transmission lines to obtain numerical values corresponding to the electric parameters in the associated electric transmission lines, wherein the electric parameters are wire electric parameters and transformer electric parameters, and the specific detection process is as follows:
selecting power detection points of all the wires in all the transmission line sections in the associated transmission line according to the corresponding wires in all the transmission line sections in the associated transmission line, laying power detection equipment at the selected power detection points, and detecting power parameters of all the wires by using the power detection equipment in all the power detection point positions of all the wires in all the transmission line sections in the associated transmission line according to preset detection time points, wherein the power parameters of the wires comprise wire running current and wire running voltage;
it should be noted that the power detection device includes a current sensor and a voltage sensor, where the current sensor is used for detecting the operating current of the conductor, and the voltage sensor is used for detecting the operating voltage of the conductor.
Extracting corresponding transformers in each transmission line section in the associated transmission line according to the number of the corresponding transformers in the associated transmission line, detecting discharge signals of the transformers in each transmission line section in the associated transmission line according to a preset acquisition time period by using the ultrahigh frequency sensor carried by each transformer in each transmission line section, and acquiring the discharge signal values of each transformer in each acquisition time period in each transmission line section in the associated transmission line.
S4, performing primary processing on each line state corresponding to each transmission line section in the associated transmission line and each power parameter corresponding to each transmission line section in the associated transmission line;
specifically, the specific processing procedure of performing preliminary processing on each line state corresponding to each transmission line segment in the associated transmission line and each power parameter corresponding to each transmission line segment in the associated transmission line is as follows:
firstly, according to each line state corresponding to each transmission line section in the associated transmission line, performing state confirmation on each line state to obtain state types corresponding to each electric pole, each lead, each pull wire and each line element in each type in each transmission line section in the associated transmission line;
in a specific embodiment, the specific process of preprocessing each line status and confirming each line status includes the following steps:
f1, comparing the number and the comprehensive crack area corresponding to each electric pole in each transmission line section with the number and the comprehensive crack area corresponding to a preset electric pole damage state, and if the number and the average crack area corresponding to a certain electric pole are both greater than or equal to a preset value, recording the state type corresponding to the electric pole as a damage state, otherwise, recording as a normal state;
f2, comparing the sag values corresponding to the wires in the transmission line sections with the sag values corresponding to the preset abnormal sag states of the wires, and if the sag value corresponding to one wire in a certain transmission line section is larger than the preset abnormal sag value of the wire corresponding to the abnormal sag state of the wire, recording the state type corresponding to the wire in the transmission line section as an abnormal sag state, otherwise, recording as a normal sag state; comparing a certain stay wire type with each stay wire type corresponding to a preset deformation state, recording the stay wire state type as a deformation state if the certain stay wire type is consistent with the stay wire type corresponding to the deformation state, and otherwise, connecting the stay wire state with an undeformed state;
illustratively, the type corresponding to the deformation state of the stay wire comprises loose strands, broken wires, abrasion and the like.
F3, obtaining surface equivalent salt-attached densities corresponding to insulator strings in each transmission line section in the associated transmission line, matching and comparing the surface equivalent salt-attached densities with surface salt-attached density values corresponding to preset insulator strings in each pollution state, screening out pollution state types corresponding to insulator strings in each transmission line section in the associated transmission line, simultaneously obtaining insulation resistance values corresponding to insulators in insulator strings in each transmission line section in the associated transmission line, matching and comparing the insulation resistance values corresponding to the insulators with insulation resistance values corresponding to preset insulation abnormal states, and recording the state type of the insulator in the insulator string as an insulation abnormal state if the insulation resistance value corresponding to an insulator in the insulator string meets the insulation resistance value corresponding to the preset insulation abnormal state, otherwise, recording the state type of the insulator in the insulator string as an insulation normal state;
and F4, acquiring the temperature corresponding to each hardware in each transmission line section in the associated transmission line in each acquisition time period, obtaining the average temperature corresponding to each hardware in each transmission line section in the associated line by using an average value calculation mode, comparing the average temperature corresponding to each hardware in each transmission line section in the associated line with the preset temperature corresponding to the abnormal state of the hardware, and recording the state type of the hardware as the abnormal state of the temperature if the average temperature corresponding to a certain hardware in a certain transmission line section is greater than or equal to the temperature corresponding to the abnormal state of the hardware, otherwise, recording as the normal state of the temperature.
Secondly, according to the running current and running voltage of each power detection point on each conductor in each transmission line section in the associated transmission line corresponding to each detection time point, calculating the average running current and average running voltage corresponding to each conductor in each transmission line section in the associated transmission line by using an average value calculation method, and respectively expressing the average running current and average running voltage as V i t And A i t Simultaneously screening out the maximum discharge signal value corresponding to each transformer in each transmission line section in the associated line according to the discharge signal value corresponding to each transformer in each acquisition time period in each transmission line section in the associated transmission line, and marking as B i j J denotes the transformer number, j =1,2.
It should be noted that in one embodiment, the inclement weather includes high winds and rain and snow storms, ice, lightning strikes, and high temperatures, and the inclement weather levels include three levels, wherein one level of inclement > two levels of inclement > three levels of inclement.
S5, extracting the position of the area where the associated power transmission line is located from the basic information corresponding to the associated power transmission line, and extracting historical meteorological information corresponding to the position of the area where the associated power transmission line is located from an area meteorological database, wherein the historical meteorological information comprises the frequency of occurrence of historical severe weather and the corresponding severe grade of the historical severe weather each time;
according to the method, the line state, the power parameter and the historical meteorological information corresponding to each power transmission line section in the associated power transmission line are acquired, so that the problem that the current evaluation mode is specific and general is solved, the targeted evaluation on the operation safety of the associated overhead power transmission line of the power system to be monitored is realized, the accuracy of the evaluation result of the power transmission and transformation operation safety of the power system is guaranteed, the evaluation workload of the operation safety of the power transmission and transformation of the power system is effectively reduced, the error in the evaluation process is reduced as much as possible, and the refined and visualized evaluation on the operation safety of the power transmission and transformation of the power system is realized.
S6, further analyzing the line state corresponding to the associated power transmission line, the primary processing result of each power parameter corresponding to the associated power transmission line and historical meteorological information corresponding to the area position of the associated power transmission line, and evaluating the power transmission and transformation operation safety of the power system to be monitored;
it should be noted that the specific analysis process for further analyzing the line state corresponding to the associated power transmission line, the preliminary processing result of each power parameter corresponding to the associated power transmission line, and the historical meteorological information corresponding to the area location where the associated power transmission line is located includes the following steps
1) Acquiring state types corresponding to each electric pole, each lead, each stay wire and each line element in each transmission line section in the associated transmission line, recording the state types as external analysis elements, setting safety influence weights of the external analysis elements, further counting comprehensive safety indexes of the external analysis elements of the associated transmission line, and recording the comprehensive safety indexes as YZ;
illustratively, the specific setting process for setting the security impact weight for each external analysis element includes the following steps:
y1, obtaining state types corresponding to electric poles in each electric transmission line section in the associated electric transmission line, wherein the state types of the electric poles comprise damage states and normal states, recording a safety influence weight value corresponding to the damage states of the electric poles as alpha, and recording a safety influence weight value corresponding to the normal states of the electric poles as alpha ', and the alpha is larger than alpha'.
Y2, obtaining state types corresponding to all wires in all power transmission line sections in the associated power transmission line, wherein the wire state types comprise an abnormal sag state and a normal sag state, recording a safety influence weight value corresponding to the abnormal sag state of the wire as beta, and recording a safety influence weight value corresponding to the normal sag state of the wire as beta ', wherein beta is larger than beta';
y3, obtaining state types corresponding to the pull wires in each transmission line section in the associated transmission line, wherein the state types corresponding to the pull wires comprise a deformation state and an undeformed state, the safety influence weight value corresponding to the deformation state of the pull wires is recorded as x, and the safety influence weight value corresponding to the undeformed state of the pull wires is recorded as x ', and x is larger than x';
y4, acquiring state types corresponding to insulator strings of each transmission line segment in the associated transmission line, wherein the state types corresponding to the insulator strings comprise a pollution state and an insulation state, the pollution state comprises a non-pollution state, a common pollution state and a serious pollution state, a safety influence weight value corresponding to the non-pollution state is recorded as delta 1, a safety influence weight value corresponding to a medium pollution state is recorded as delta 1, a safety influence weight value corresponding to the serious pollution state is recorded as delta 2, delta 3 is larger than delta 2 is larger than delta 1, the insulation state type comprises an insulation abnormal state and an insulation normal state, a safety influence weight value phi corresponding to the insulation abnormal state of the insulator string is recorded, and a safety influence weight value phi ' corresponding to the insulation normal state of the insulator string is recorded as phi ', phi ';
y5, acquiring the corresponding state of each hardware fitting in each transmission line section in the associated transmission line, wherein the hardware fitting state types comprise abnormal temperature state and normal temperature state, and recording the safety influence weight value corresponding to the abnormal temperature state of the hardware fitting as the safety influence weight value
Recording the corresponding safety influence weight value of the hardware in the normal temperature state
In another exemplary embodiment, the specific statistical process of statistically associating the comprehensive safety index of the external analysis element of the power transmission line is as follows:
r1, counting the number of the electric poles in the damage state in each transmission line section in the associated transmission line according to the state type corresponding to each electric pole in each transmission line section in the associated transmission line, and recording the number as k' i ；
R2, counting the number of the wires in the abnormal sag state in each transmission line section in the associated transmission line according to the state type corresponding to each wire in each transmission line section in the associated transmission line, and recording the number as h' i ；
R3, according to the state type corresponding to each stay wire in each transmission line section in the associated transmission line, counting the number of the stay wires in the deformation state in each transmission line section in the associated transmission line, and marking as y' i ；
R4, respectively counting the number of insulator strings in a serious pollution state and the number of insulators in an abnormal insulation state in each insulator string in each transmission line section in the associated transmission line according to the pollution state type and the insulation state type corresponding to each insulator string in each transmission line section in the associated transmission line, and recording the number of insulator strings in the serious pollution state in each transmission line section as g' i The number of insulators in an abnormal insulation state in each insulator string in each transmission line section is recorded as p i s ；
R5, counting the number of hardware fittings in abnormal temperature state in each transmission line section in the associated transmission line according to the state type corresponding to each hardware fitting in each transmission line section in the associated transmission line, and marking as v' i ；
R6, calculating the comprehensive safety index of the external analysis elements of the associated power transmission line by using a calculation formula, wherein the specific calculation formula is
Mu 1, mu 2 and mu 3 are preset correction factors, ki.hi, yi, gi, v i Respectively denoted as corresponding poles in the ith transmission line sectionNumber, number of wires, number of strings, number of insulator strings, number of fittings,
and the number of insulators corresponding to the s-th insulator string in the ith transmission line section is represented.
2) Obtaining the corresponding numerical value of each power parameter in the associated power transmission line, recording each power parameter as an internal analysis element, and substituting the maximum discharge signal value corresponding to each transformer in each power transmission line section in the associated line, the average running current and the average running voltage corresponding to each lead in each power transmission line section in the associated line into a calculation formula
Obtaining safety indexes of internal analysis elements of the associated power transmission line, wherein sigma 1 and sigma 2 are preset weight values, delta V and delta A respectively represent a preset allowable voltage difference value and a preset allowable current difference value, B ' represents a preset transformer safety discharge signal value, and V ' and A ' are respectively a preset lead standard operating voltage and a preset standard operating current;
3) Acquiring historical severe weather occurrence times of the area where the associated power transmission line is located and severe grades corresponding to severe weather occurrence times, recording the historical severe weather occurrence times of the area where the associated power transmission line is located and the severe grades corresponding to severe weather occurrence times as auxiliary analysis elements, calculating the safety index of the auxiliary analysis elements of the associated power transmission line by using a calculation formula, and marking the safety index as FZ;
in a specific embodiment, the associated power transmission line auxiliary analysis element safety index calculation process includes: comparing the corresponding severe grades of the area position of the associated power transmission line when severe weather occurs at each time, screening out the occurrence times corresponding to each severe grade of the area position of the associated power transmission line, and substituting the historical severe weather occurrence times and the occurrence times corresponding to each severe grade into
And obtaining the safety index of the auxiliary analysis element of the associated power transmission lineWherein ec represents the number of occurrences of historical bad weather, yc represents the number of occurrences allowed corresponding to preset bad weather,
is a safety influence coefficient of severe weather, gamma x Represents the safety influence weight, T, corresponding to the x-th preset severe level x The number of occurrences corresponding to the xth severe level is represented, x is a severe level number, and x = w1, w2, w3, w1, w2 and w3 respectively represent a first-level severe level, a second-level severe level and a third-level severe level;
in addition, γ is x And T x The values are positive numbers.
4) And substituting the comprehensive safety index YZ of the external analysis element of the associated transmission line, the safety index NZ of the internal analysis element of the associated transmission line and the safety index FZ of the auxiliary analysis element of the associated transmission line into ZQ = lambda 1X YZ + lambda 1X NZ + lambda 3X FZ to obtain the comprehensive safety index of the transmission and transformation of the power system to be monitored, wherein lambda 1, lambda 2 and lambda 3 respectively represent preset coefficients, and lambda 1+ lambda 2+ lambda 3=1.
In one embodiment, it should be noted that, if the safety index of the power system to be monitored is larger, the operation process of the power system to be monitored is safer, and otherwise, the power system to be monitored is more dangerous, and all the safety index formulas mentioned in this embodiment follow the rule.
Specifically, the specific process of evaluating the power transmission and transformation operation safety of the power system to be monitored in step S6 is as follows: the method comprises the steps of obtaining a comprehensive power transmission and transformation safety index of a power system to be monitored, matching and comparing the comprehensive power transmission and transformation safety index of the power system to be monitored with safety indexes corresponding to preset safety levels, and comparing the safety levels corresponding to the power transmission and transformation of the power system to be monitored, wherein the preset safety levels comprise first-level safety, second-level safety and third-level safety, the first-level safety is greater than the second-level safety and the third-level safety is greater than the third-level safety, if the safety level corresponding to the power transmission and transformation of the power system to be monitored reaches the second level or the first level, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as safe, and if not, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as unsafe.
The specific process for evaluating the power transmission and transformation operation safety of the power system to be monitored comprises the following steps: the method comprises the steps of obtaining a comprehensive power transmission and transformation safety index of a power system to be monitored, matching and comparing safety indexes corresponding to safety levels preset by the comprehensive power transmission and transformation safety index of the power system to be monitored, and comparing safety levels corresponding to power transmission and transformation of the power system to be monitored, wherein the preset safety levels comprise first-level safety, second-level safety and third-level safety, the first-level safety is greater than the second-level safety and is greater than the third-level safety, if the safety level corresponding to the power transmission and transformation of the power system to be monitored reaches the second level or the first level, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as safe, and if not, the operation evaluation state is recorded as unsafe.
According to the embodiment of the invention, the operation safety state of the power transmission and transformation of the power system to be monitored is effectively highlighted by quantitatively evaluating the operation safety of the power transmission and transformation of the power system to be monitored, the accurate and efficient analysis of the power transmission line is realized, and reliable and powerful data reference is further provided for the power system to carry out operation and maintenance work of the overhead power transmission line to a certain extent.
And S7, transmitting the evaluation result of the power transmission and transformation operation safety of the power system to be monitored to operation and maintenance supervision personnel corresponding to the power system to be monitored.
Specifically, the evaluation result of the power transmission and transformation operation safety of the power system to be monitored is sent to the operation and maintenance manager corresponding to the power system to be monitored, so that the safety level and the operation evaluation state corresponding to the power transmission and transformation of the power system to be monitored are sent to the operation and maintenance manager corresponding to the power system to be monitored.
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 (6)
1. The intelligent power grid power system power transmission and transformation operation safety quantitative evaluation method is characterized by comprising the following steps:
s1, acquiring a related power transmission line corresponding to a power system to be monitored, and extracting basic information corresponding to the related power transmission line;
s2, dividing the associated transmission line into transmission line sections according to a preset interval, and detecting line states corresponding to the transmission line sections in the associated transmission line;
wherein, step S2 specifically comprises the following steps:
s21, counting each electric pole corresponding to each electric transmission line section in the associated electric transmission line, and detecting the state corresponding to each electric pole;
s22, counting each corresponding lead and each pull wire in each transmission line section in the associated transmission line, and detecting the state corresponding to each lead and each pull wire;
step S23, counting each corresponding line element in each transmission line section in the associated transmission line, obtaining the type corresponding to each line element, and further detecting the state corresponding to each line element in each type;
s3, detecting the electric power parameters corresponding to the associated electric transmission lines to obtain the numerical values corresponding to the electric power parameters in the associated electric transmission lines;
s4, performing primary processing on each line state corresponding to each transmission line section in the associated transmission line and each power parameter corresponding to each transmission line section in the associated transmission line;
s5, extracting the position of the area where the associated power transmission line is located from the basic information corresponding to the associated power transmission line, and extracting historical meteorological information corresponding to the position of the area where the associated power transmission line is located from an area meteorological database, wherein the historical meteorological information comprises the frequency of occurrence of historical severe weather and the corresponding severe grade of the historical severe weather each time;
s6, further analyzing the line state corresponding to the associated power transmission line, the primary processing result of each power parameter corresponding to the associated power transmission line and historical meteorological information corresponding to the area position of the associated power transmission line, and evaluating the power transmission and transformation operation safety of the power system to be monitored;
s7, transmitting the evaluation result of the power transmission and transformation operation safety of the power system to be monitored to operation and maintenance supervision personnel corresponding to the power system to be monitored;
the specific execution process of detecting the state corresponding to each electric pole in step S21 includes the following steps:
numbering each power transmission line section in the associated power transmission lines, and sequentially marking the power transmission line sections as 1,2,. I,. N;
marking each electric pole in each transmission line section in the associated transmission line as G i r R is a pole number, r =1,2,... K, i is a transmission line section number, i =1,2,... N;
acquiring images of each electric pole by using a first camera at the position of each electric pole in each electric transmission line section in the associated electric transmission line, acquiring images corresponding to each electric pole in each electric transmission line section in the associated electric transmission line, and acquiring the state corresponding to each electric pole in each electric transmission line section in the associated electric transmission line;
the specific detection process of the state corresponding to each wire and each pull wire in the step S22 is as follows: marking each corresponding lead in each transmission line section in the associated transmission line as X according to each corresponding lead and each corresponding pull wire in each transmission line section in the associated transmission line i t Marking each corresponding stay wire in each transmission line section in the associated transmission line as L i d T represents a lead number, t =1,2, a.. Once.h, d represents a stay wire number, d =1,2, a.. Once.y, and an unmanned aerial vehicle is used for carrying out along-the-way shooting on the lead and the stay wire in the transmission line section of the unmanned aerial vehicle to obtain a lead image and a stay wire image corresponding to each transmission line section in the associated transmission line, and further obtain a lead state and a stay wire state corresponding to each transmission line section in the associated transmission line;
the specific processing procedure of performing preliminary processing on each line state corresponding to each transmission line segment in the associated transmission line and each power parameter corresponding to each transmission line segment in the associated transmission line in step S4 is as follows:
firstly, according to each line state corresponding to each transmission line section in the associated transmission line, performing state confirmation on each line state to obtain state types corresponding to each electric pole, each lead, each pull wire and each line element in each type in each transmission line section in the associated transmission line;
secondly, according to the running current and running voltage of each power detection point on each conductor in each transmission line section in the associated transmission line corresponding to each detection time point, calculating the average running current and average running voltage corresponding to each conductor in each transmission line section in the associated transmission line by using an average value calculation method, and respectively expressing the average running current and average running voltage as V i t And A i t Meanwhile, according to the discharge signal value corresponding to each transformer in each transmission line section in the associated transmission line in each acquisition time period, screening out the maximum discharge signal value corresponding to each transformer in each transmission line section in the associated line, and marking as B i j J denotes the transformer number, j =1,2, ·. m;
the specific analysis process for further analyzing the line state corresponding to the associated power transmission line, the preliminary processing result of each power parameter corresponding to the associated power transmission line, and the historical meteorological information corresponding to the area position where the associated power transmission line is located in the step S6 includes the following steps:
acquiring state types corresponding to each electric pole, each lead, each stay wire and each line element in each transmission line section in the associated transmission line, recording the state types as external analysis elements, setting safety influence weights of the external analysis elements, further counting comprehensive safety indexes of the external analysis elements of the associated transmission line, and recording the comprehensive safety indexes as YZ;
obtaining the corresponding numerical value of each power parameter in the associated power transmission line, recording each power parameter as an internal analysis element, and substituting the maximum discharge signal value corresponding to each transformer in each power transmission line section in the associated line, the average running current and the average running voltage corresponding to each lead in each power transmission line section in the associated line into a calculation formula
Obtaining safety indexes of internal analysis elements of the associated power transmission line, wherein sigma 1 and sigma 2 are preset weight values, delta V and delta A respectively represent a preset allowable voltage difference value and a preset allowable current difference value, and B' represents preset power transformationThe safe discharge signal value V 'and A' are respectively preset standard operation voltage and standard operation current of the lead;
acquiring historical severe weather occurrence times of the area where the associated power transmission line is located and severe grades corresponding to severe weather occurrence times, recording the historical severe weather occurrence times of the area where the associated power transmission line is located and the severe grades corresponding to severe weather occurrence times as auxiliary analysis elements, calculating the safety index of the auxiliary analysis elements of the associated power transmission line by using a calculation formula, and marking the safety index as FZ;
and substituting the comprehensive safety index YZ of the external analysis element of the associated transmission line, the safety index NZ of the internal analysis element of the associated transmission line and the safety index FZ of the auxiliary analysis element of the associated transmission line into ZQ = lambda 1X YZ + lambda 1X NZ + lambda 3X FZ to obtain the comprehensive safety index of the transmission and transformation of the power system to be monitored, wherein lambda 1, lambda 2 and lambda 3 respectively represent preset coefficients, and lambda 1+ lambda 2+ lambda 3=1.
2. The smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method as claimed in claim 1, wherein: the basic information corresponding to the associated power transmission line comprises the position of the corresponding region of the associated power transmission line, insulator string information, hardware fitting information and transformer information contained in the associated power transmission line.
3. The smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method as claimed in claim 2, characterized in that: the method comprises the steps that insulator string information contained in the associated power transmission line is the number of insulator strings and the number of insulators contained in each insulator string, hardware fitting information contained in the associated power transmission line is the number of hardware fittings, and transformer information contained in the associated power transmission line is the number of transformers.
4. The smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method as claimed in claim 1, wherein: the type corresponding to each line element in the step S23 specifically includes an insulator string and a hardware fitting, and the specific state detection process includes the following steps:
comparing the types of the corresponding line elements in each transmission line section in the associated transmission line with each other, and respectively screening out the number of the corresponding insulator strings and the number of the corresponding hardware fittings in each transmission line section in the associated transmission line to obtain the corresponding insulator strings and the corresponding hardware fittings in each transmission line section in the associated transmission line;
marking each insulator chain and each hardware fitting corresponding to each transmission line section in the associated transmission line as J i s And Y i u S is an insulator string number, s =1,2,.. G, u is an hardware number, and u =1,2,... V;
detecting the equivalent salt-attached density of the surface of the insulator string by using an insulator salt density tester carried by each insulator string in each transmission line section in the associated transmission line, further obtaining the equivalent salt-attached density of the surface corresponding to each insulator string in each transmission line section in the associated transmission line, and simultaneously collecting the insulation resistance of each insulator in the insulator string by using an insulation resistance instrument carried by each insulator string in each transmission line section in the associated transmission line, so as to obtain the insulation resistance corresponding to each insulator in each insulator string in each transmission line section in the associated transmission line;
and detecting the temperature of each hardware in each transmission line section in the associated transmission line according to a preset acquisition time interval by using a temperature sensor carried by each hardware in each transmission line section in the associated transmission line, and acquiring the temperature corresponding to each hardware in each acquisition time interval in each transmission line section in the associated transmission line.
5. The smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method as claimed in claim 1, wherein: in the step S3, the power parameters corresponding to the associated power transmission line are a conductor power parameter and a transformer power parameter, and the specific detection process is as follows:
selecting power detection points of all the wires in all the transmission line sections in the associated transmission line according to the corresponding wires in all the transmission line sections in the associated transmission line, laying power detection equipment at the selected power detection points, detecting power parameters of all the wires by using the power detection equipment in all the power detection point positions of all the wires in all the transmission line sections in the associated transmission line according to preset detection time points, and acquiring power parameters of all the wires corresponding to all the detection time points at all the power detection point positions of all the wires in all the transmission line sections in the associated transmission line, wherein the power parameters of the wires comprise wire operating current and wire operating voltage;
extracting the corresponding transformers in each transmission line section in the associated transmission line according to the number of the corresponding transformers in the associated transmission line and the corresponding positions of the transformers, detecting discharge signals of the ultrahigh frequency sensors carried by the transformers in each transmission line section in the associated transmission line according to a preset acquisition time period, and acquiring the discharge signal values of the transformers in each transmission line section in the associated transmission line corresponding to each acquisition time period.
6. The smart grid power system power transmission and transformation operation safety quantitative intelligent evaluation method as claimed in claim 1, characterized in that: the specific process of evaluating the power transmission and transformation operation safety of the power system to be monitored in the step S6 is as follows: the method comprises the steps of obtaining a comprehensive power transmission and transformation safety index of a power system to be monitored, matching and comparing the comprehensive power transmission and transformation safety index of the power system to be monitored with safety indexes corresponding to preset safety levels, and comparing the safety levels corresponding to the power transmission and transformation of the power system to be monitored, wherein the preset safety levels comprise first-level safety, second-level safety and third-level safety, the first-level safety is greater than the second-level safety and the third-level safety is greater than the third-level safety, if the safety level corresponding to the power transmission and transformation of the power system to be monitored reaches the second level or the first level, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as safe, and if not, the operation evaluation state of the power transmission and transformation of the power system to be monitored is recorded as unsafe.
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| CN115236285B (en) * | 2022-07-27 | 2024-02-09 | 国网安徽省电力有限公司经济技术研究院 | Intelligent monitoring and analyzing method, equipment and storage medium for energy power system emission |
| CN115345480A (en) * | 2022-08-13 | 2022-11-15 | 国网安徽省电力有限公司经济技术研究院 | Overhead transmission line monitoring and early warning method based on digitization technology |
| CN116362631B (en) * | 2023-06-02 | 2023-08-11 | 国网安徽省电力有限公司经济技术研究院 | DC power distribution network operation safety evaluation system based on big data |
| CN116413545B (en) * | 2023-06-09 | 2023-09-01 | 国网安徽省电力有限公司经济技术研究院 | Method and system for evaluating electric energy quality of direct-current distribution network |
| CN117477769A (en) * | 2023-10-26 | 2024-01-30 | 国网安徽省电力有限公司合肥供电公司 | Early warning method and system for electric power system |
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