CN109742765B - Power distribution station gear adjusting method and device - Google Patents
Power distribution station gear adjusting method and device Download PDFInfo
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Abstract
The application provides a method and a device for adjusting gears of a power distribution area, which comprise the following steps: acquiring operation data of the distribution line in a preset time period, wherein the operation data comprises a first in-operation gear and an initial voltage of a distribution line area before gear shifting, a second in-operation gear of the distribution line area after gear shifting, current of the distribution line area on the distribution line after gear shifting and a preset outlet voltage of the distribution line area; calculating the minimum gear shifting times of the distribution line according to the first in-operation gear and the second in-operation gear; calculating the adjusted voltage of the power distribution station area according to the first operating gear, the second operating gear and the initial voltage; calculating to obtain the required voltage of the power distribution area according to the current; determining the user voltage target qualification rate of the distribution line according to the required voltage and the adjusted voltage; determining the outlet voltage target qualification rate of the distribution line according to the adjusted voltage and the preset outlet voltage; and analyzing to obtain a target gear shifting scheme of the distribution station area on the distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage and the target qualification rate of the outlet voltage.
Description
Technical Field
The application relates to the technical field of power distribution and utilization, in particular to a power distribution station gear adjusting method and device.
Background
Along with the increasing demand of residents on power supply and the corresponding higher and higher power quality requirements, the problem that the voltage qualification rate of a user side is low due to the fact that the voltage of a power distribution station area frequently exceeds the limit exists for a long time. The research of the applicant finds that the no-load voltage-regulating distribution transformer is widely used in the distribution network at the present stage, and the gear regulation needs to be completed by power failure. However, in practical situations, the randomness of user load is high, and the operation and maintenance unit needs to frequently shift the distribution area to ensure the quality of power supply of the user to ensure the qualified rate of the user voltage of the distribution area.
Disclosure of Invention
In order to overcome the defects in the prior art, the application provides a power distribution station gear adjusting method and device to solve the problems.
In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a power distribution station zone gear adjusting method, including: the method comprises the steps of obtaining operation data of a power distribution line in a preset time period, wherein the power distribution line comprises a plurality of power distribution areas, the operation data comprise a first power distribution area before gear shifting, a first gear and an initial voltage of the power distribution area and a second power distribution area after gear shifting, the current of the power distribution area and a preset outlet voltage of the power distribution area on the power distribution line. And calculating the minimum gear shifting times of the distribution line according to the first in-operation gear and the second in-operation gear. And calculating the adjusted voltage of the power distribution station area according to the first operating position, the second operating position and the initial voltage. And calculating the required voltage of the power distribution station area according to the current. And determining the user voltage target qualification rate of the distribution line according to the required voltage and the adjusted voltage. And determining the outlet voltage target qualification rate of the distribution line according to the adjusting voltage and the preset outlet voltage. And analyzing and obtaining a target gear shifting scheme of the power distribution area on the power distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage and the target qualification rate of the outlet voltage.
Optionally, the calculating the minimum number of shifts of the distribution line according to the first current gear and the second current gear comprises: and judging whether the first operating gear and the second operating gear of each power distribution station area are the same or not. And if the gear change factors are the same, recording the gear change factors as a first value, otherwise, recording the gear change factors as a second value, wherein the gear change factors represent the current gear change condition of the power distribution station area. And calculating the number of the power distribution station areas for performing gear shifting operation on the power distribution line in each gear shifting process according to the gear shifting factor. And obtaining the minimum gear shifting times by comparing the number of the power distribution station areas corresponding to each gear shifting operation of the distribution line in the preset time period.
Optionally, the step of obtaining the minimum number of shifts by comparing the number of the power distribution areas corresponding to each shift operation of the distribution line in the preset time period is implemented by:
wherein the content of the first and second substances,3indicates the minimum number of shifts, ai 3The gear change factor of the ith power distribution station area is represented, n represents the number of the power distribution station areas on the power distribution line, and n is a positive integer.
Optionally, the calculating the adjusted voltage of the distribution substation area according to the first operating position, the second operating position and the initial voltage is implemented by:
wherein the content of the first and second substances,uq jiindicating the regulated voltage, k, of the ith distribution area of the jth collection pointi 0Representing the gear k of the ith distribution area on the distribution line before gear shiftingi 1Representing the gear position u of the ith distribution area on the distribution line after gear shiftingp jiThe initial voltage of the ith power distribution station area of the jth collection point, n represents the number of the power distribution station areas, and m represents the number of the collection points.
Optionally, the calculating of the required voltage of the power distribution area according to the current is implemented by:
wherein u isc jiThe required voltage of the ith power distribution station area of the jth collection point is shown, 198v is the base voltage of a user side, IjiCurrent, z, representing ith distribution area of jth collection pointiThe impedance of the ith power distribution station line is represented, n represents the number of the power distribution stations, and m represents the number of the acquisition points.
Optionally, the determining the target qualification rate of the user voltage according to the required voltage and the adjustment voltage includes: comparing the demand voltage and the regulated voltage; and if the required voltage is greater than the adjusting voltage, recording a first comparison factor as a third value, otherwise, recording the first comparison factor as a fourth value. The first comparison factor represents a comparison result of the demand voltage and the regulated voltage. And calculating the user voltage qualified rate according to the first comparison factor of each power distribution station area. And obtaining the user voltage target qualification rate by comparing the user voltage qualification rate.
Optionally, the step of obtaining the target user voltage yield by comparing the target user voltage yield is implemented by:
wherein, a1 jiA first comparison factor, p, representing the ith station distribution area of the jth collection point1The target qualification rate of the user voltage is represented, n represents the number of the distribution station areas, and m represents the number of the collection points.
Optionally, analyzing the outlet voltage qualification rate according to the adjustment voltage and the preset outlet voltage includes: comparing the regulated voltage with the preset outlet voltage, recording a second comparison factor as a fifth value if the regulated voltage is greater than the preset outlet voltage, and recording the second comparison factor as a sixth value if the regulated voltage is not greater than the preset outlet voltage, wherein the second comparison factor represents a comparison result of the regulated voltage and the preset outlet voltage; calculating the outlet voltage qualified rate according to the second comparison factor of each power distribution area; and obtaining the outlet voltage target qualification rate by comparing the outlet voltage qualification rate.
Optionally, the analyzing and obtaining the target gear shifting scheme of the power distribution area on the power distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage, and the target qualification rate of the outlet voltage includes: and obtaining a fitness objective function by taking the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate as objective factors. And taking the number of the gears of the power distribution area as a discrete variable. And setting the size of the population according to the number of the distribution areas on the distribution line. And performing multi-target discrete variable genetic algorithm processing on the operation data according to the fitness objective function, the discrete variables and the population size to obtain a target gear shifting scheme.
In a second aspect, an embodiment of the present application provides a distribution board area gear adjusting device, including:
the acquisition module is used for acquiring the operation data of the distribution line in the preset time period, the distribution line comprises a plurality of distribution areas, the operation data comprises the operation gear and the initial voltage of the first distribution area before gear shifting, and the gear shifting is performed on the second distribution area after the operation gear and the gear shifting, the current of the distribution area and the preset outlet voltage of the distribution area are performed on the distribution line.
And the first analysis module is used for calculating the minimum gear shifting times of the distribution line according to the first current operating gear and the second current operating gear.
And the second analysis module is used for calculating the adjusted voltage of the power distribution station area according to the first operating position, the second operating position and the initial voltage.
The second analysis module is further used for calculating the required voltage of the power distribution area according to the current, obtaining the target qualification rate of the user voltage according to the required voltage and the adjustment voltage, and obtaining the target qualification rate of the outlet voltage according to the adjustment voltage and the preset outlet voltage.
And the third analysis module is used for analyzing and obtaining a target gear shifting scheme of the power distribution station area on the power distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage and the target qualification rate of the outlet voltage.
According to the method and the device for adjusting the gear of the distribution area, firstly, historical operation data of each distribution area on a distribution line are obtained. Secondly, calculating the number of power distribution areas for executing gear shifting operation in each gear shifting process according to a first operating gear before gear shifting of each power distribution area and a second operating gear after gear shifting in historical operating data; and comparing the number of the power distribution station areas performing the gear shifting operation in each gear shifting process to obtain the minimum gear shifting times in the historical operation process. Thirdly, calculating the initial voltage of each power distribution area according to the first operating gear, the second operating gear and the initial voltage of each power distribution area before each gear shifting to obtain the adjustment voltage of each power distribution area; and calculating the required voltage of the power distribution station area according to the current after the gear shifting of each power distribution station area in the operation data. Then, calculating the user voltage qualified rate of the gear shifting process according to the required voltage and the regulated voltage of each power distribution station area on the power distribution line, and comparing the user voltage qualified rate of each gear shifting process to obtain the user voltage target qualified rate; and calculating the qualified rate of the outlet voltage of the gear shifting process according to the adjusting voltage and the preset outlet voltage and the adjusting voltage of each power distribution station area on the power distribution line, and comparing the qualified rate of the outlet voltage of each gear shifting process to obtain the target qualified rate of the outlet voltage. And finally, comprehensively analyzing historical operating data according to the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate to obtain an optimal gear shifting scheme in a corresponding time period as a uniform gear shifting scheme in the time period, so that the problem of frequent power failure and gear shifting is avoided.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the application and are therefore not to be considered limiting of its scope, for those skilled in the art will be able to derive additional related drawings therefrom without the benefit of the inventive faculty.
Fig. 1 is a schematic overall flow chart of a gear adjustment method provided in an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a target gear shifting scheme obtaining process provided in an embodiment of the present application;
fig. 3 is a block diagram of a structure of a gear adjusting device of a power distribution station area according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a power distribution station area gear adjustment device provided in an embodiment of the present application.
Icon: 10-distribution substation gear adjusting equipment; 100-distribution substation area gear adjusting device; 110-an obtaining module; 120-a first analysis module; 130-a second analysis module; 140-a third analysis module; 200-a data processing structure; 210-a memory; 220-a storage controller; 230-a processor; 240-a display; 250-an input device; 260-bus.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the described embodiments are merely a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is to be noted that the terms "middle", "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put on use of the products of the present invention, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The applicant researches and discovers that the existing no-load voltage regulation distribution transformer is a distribution transformer mode widely used in the existing power distribution network, and power failure is needed in the gear shifting process. In actual situations, the randomness of user loads is high, the operation and maintenance unit needs to frequently shift the distribution area to ensure the quality of power supply of users to ensure the voltage qualification rate of users in the distribution area, but frequent shifting also correspondingly increases complaints of users on frequent power failure. Therefore, how to ensure the voltage qualified rate through the limited gear shifting times has important significance.
Referring to fig. 1, fig. 1 is a schematic overall flow chart of a gear adjusting method according to an embodiment of the present application.
In the embodiment that this application provided, for more reasonable to the distribution board district shift gears, guarantee the voltage qualification rate in each distribution board district on the distribution lines, at first obtain the historical operating data in each distribution board district on the distribution lines, then carry out the analysis to operating data according to the mode of setting for and obtain the optimal scheme of shifting gears, specific content is as follows.
And step S101, acquiring the operation data of the distribution line in a preset time period.
In the embodiment that this application provided, in order to carry out reasonable gear shifting to the distribution panel district better, can acquire the operating data on the distribution lines in a period and carry out the analysis for obtain the optimal gear shifting scheme in this period.
In a possible implementation manner provided by the application, the operation data of the distribution line can be acquired from a lean operation and maintenance lifting platform of a distribution substation area, and can also be acquired from a remote server in a network communication manner. When the data are obtained, the operation data in the corresponding time period can be obtained according to the actual gear shifting requirement. For example, the operation data on the same distribution line in each quarter may be acquired in each quarter, and the operation data includes an in-operation gear (i.e., a first in-operation gear) before the gear shifting of each distribution station area on the corresponding distribution line in the quarter, an in-operation gear (i.e., a second in-operation gear) after the gear shifting, a current on the line of each distribution station area, and a preset outlet voltage of the distribution station area.
And step S102, calculating the minimum gear shifting times of the distribution line according to the first current gear and the second current gear.
In the embodiment provided by the application, in order to avoid the problem that frequent power failure of the user side is caused by too frequent gear shifting, after the operation data is acquired, the number of power distribution station areas in which the gear shifting operation occurs in each gear shifting process can be obtained through calculation, and finally, the minimum gear shifting times are obtained by comparing the number of power distribution stations in which the gear shifting operation occurs in each gear shifting process.
In one possible embodiment provided by the present application, the minimum number of shifts described above is obtained in the following manner.
Firstly, a gear vector matrix K is established according to a first operating gear of each power distribution area in a gear shifting process in operating data0，K0＝[k1 0，k2 0，...ki 0，...，kn 0]Wherein k isi 0The first gear of the ith distribution area on the distribution line is represented, n is the number of the distribution areas on the distribution line, and the value range of i is [0, n]And n is a positive integer. Secondly, establishing a gear vector matrix K according to the second operating gear of each power distribution station area corresponding to the gear shifting process in the operating data1，K1＝[k1 1，k2 1，...ki 1，...，kn 1]Wherein k isi 1The first gear of the ith distribution area on the distribution line is represented, n is the number of the distribution areas on the distribution line, and the value range of i is [0, n]And n is a positive integer. Then, by comparing K0And K1Whether gears before and after gear shifting of each power distribution station area are changed or not is judged, and a gear change factor vector A is obtained3，A3＝[a1 3，a2 3，...，ai 3，...，an 3]I has a value range of [0, n]And n is a positive integer. a isi 3The value of (d) can be obtained by: k is a radical ofi 0And k isi 1Gear change factor a under the same conditioni 3Is marked as 0, ki 0And k isi 1Different gear change factor ai 3Is marked as 1, and then is shifted by each timeAnd finally, comparing the gear shifting times corresponding to all the gear shifting processes in the selected time period to obtain the minimum gear shifting time.
Step S103, calculating the adjusted voltage of the power distribution station area according to the first operating position, the second operating position and the initial voltage.
In the embodiment provided by the application, in order to make the accuracy of gear shifting better, the adjustment voltage can be obtained by calculating according to the corresponding transformation ratio before and after gear shifting of each power distribution station and the initial voltage before gear shifting, in a possible implementation manner of the application, the adjustment voltage of each power distribution station is obtained according to the following manner:
wherein u isq jiIndicating the regulated voltage, k, of the ith distribution area of the jth collection pointi 0Representing the gear k of the ith distribution area on the distribution line before gear shiftingi 1Representing the gear position u of the ith distribution area on the distribution line after gear shiftingp jiThe initial voltage of the ith power distribution station area of the jth collection point, n represents the number of the power distribution station areas, and m represents the number of the collection points. In order to perform analysis more conveniently, a corresponding initial voltage matrix can be established according to the initial voltages of the distribution substations acquired by the acquisition points, and then the adjusted voltage matrix after gear shifting is obtained through calculation according to the formula.
And step S104, calculating the required voltage of the power distribution area according to the current.
In the embodiment provided by the application, in order to better determine the user voltage qualification rate corresponding to each gear shifting process, the required voltage at the outlet of each power distribution station area can be calculated by combining a part of voltage shared by the impedance of the line on the basis of the user side voltage known by a user, and in a possible implementation mode, the required voltage is obtained by using the following mode:
wherein u isc jiThe required voltage of the ith power distribution station area of the jth collection point is shown, 198v is the voltage of a user side, IjiCurrent, z, representing ith distribution area of jth collection pointiThe impedance of the ith power distribution station line is represented, n represents the number of the power distribution stations, and m represents the number of the acquisition points.
The above-mentioned customer-side voltage is not limited to 198v, and may be set according to a customer-side voltage actually required to be provided by the customer side on the distribution line.
And step S105, determining the target qualification rate of the user voltage of the distribution line according to the required voltage and the adjusted voltage.
In the embodiment provided by the application, after the required voltage and the adjusted voltage are obtained through calculation, the first comparison factor can be obtained by comparing the magnitude of the required voltage and the adjusted voltage, and then the target qualification rate of the user voltage is calculated through the first comparison factor. In an embodiment of the present application, when the required voltage is greater than the adjustment voltage, a first comparison factor may be recorded as 1; when the required voltage is not greater than the adjustment voltage, the first comparison factor is recorded as 0, and then the gear shifting factors in each gear shifting process are summed to obtain the number of unqualified power distribution areas, so that the user voltage qualification rate in the gear shifting process is calculated. And finally, comparing the user voltage qualified rate of all the gear shifting processes in the selected time period to obtain the highest user voltage qualified rate as the user voltage target qualified rate.
It should be noted that the calculation method of the target yield of the user voltage is not limited to the above method, and the calculation method may be set according to the actual application requirement.
And S106, determining the outlet voltage target qualified rate of the distribution line according to the adjusting voltage and the preset outlet voltage.
In the embodiment that this application provided, when having guaranteed user's voltage qualification rate through shifting gears, also need guarantee the export voltage qualification rate. In an implementation manner of this embodiment, the preset outlet voltage is 247V, and the second comparison factor may be obtained by comparing the adjusted voltage of each distribution area after the gear shifting with 247V. When the adjusting voltage is larger than 247v, the requirement is not met, and the second comparison factor is recorded as 1; and when the regulated voltage is not greater than 247v, the requirement is met, the second comparison factor is recorded as 0, and the outlet voltage qualified rate of the distribution line in the current gear shifting process can be calculated after the second comparison factors of each distribution area are obtained. And then, comparing all the outlet voltage qualified rates in the selected time period to obtain the highest outlet voltage qualified rate which is used as the outlet voltage target qualified rate.
It should be noted that the preset outlet voltage is not limited to the 247v, and may be set according to the actual situation of each power distribution station.
And S107, analyzing and obtaining a target gear shifting scheme of the power distribution station area on the power distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage and the target qualification rate of the outlet voltage.
In the embodiment provided by the application, the optimal gear shifting scheme can be obtained by analyzing according to the setting after the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate in the selected time period are obtained.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a target gear shifting scheme obtaining process according to an embodiment of the present application.
In the embodiment provided by the application, after the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate in the selected time period are obtained, a multi-target discrete variable genetic algorithm can be used for analysis, and an optimal gear shifting scheme is obtained. In a possible embodiment of the present application, a multi-objective discrete variable genetic algorithm may be used to perform analysis to obtain an optimal gear shifting scheme within a selected time period, which is described in detail below.
Step S201, a fitness objective function is established according to the calculation mode of the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate.
In an embodiment provided by the present application, a corresponding objective function may be established according to a calculation manner of a minimum number of gear shifting times, a target qualification rate of a user voltage, and a target qualification rate of an outlet voltage, where the minimum number of gear shifting times may be calculated in the following manner:
3indicates the minimum number of shifts, ai 3The gear change factor of the ith power distribution station area is represented, n represents the number of the power distribution station areas on the power distribution line, and n is a positive integer.
The user voltage target yield can be obtained by the following method:
1indicating a minimum number of faulty user voltage shifts, a1 jiA first comparison factor, p, representing the ith station distribution area of the jth collection point1The target qualification rate of the user voltage is represented, n represents the number of the distribution station areas, and m represents the number of the collection points.
The outlet voltage target yield may be obtained by:
2indicating the minimum number of faulty outlet voltage shifts, a2 jiSecond comparison of ith distribution area representing jth collection pointFactor, p2The target qualified rate of the outlet voltage is represented, n represents the number of the distribution station areas, and m represents the number of the collection points.
According to1，2，3A fitness objective function f may be obtained, where in one implementation of this embodiment f is 0.51+0.42+0.13. It should be noted that the above fitness may be set according to the actual application requirement, and is not limited to the numerical value provided in this embodiment.
Step S202, establishing initial conditions according to the number of distribution station areas on the distribution line.
In the embodiment provided by the application, initial conditions during analysis can be set according to the number of distribution transformer areas on a distribution line and the number of gears of the distribution transformer areas, discrete variable number during analysis is established according to the number of gears of the distribution transformer areas, and then the size of a population during analysis is established according to the number of the distribution transformer areas. For example, when the number of gear positions of the distribution area is 5, the discrete variable may be set to 1 to 5, corresponding to 5 gear positions of the distribution area, and when there are 10 distribution areas on the distribution line, the size of the population is 105。
And step S203, carrying out selection, crossing and mutation operations according to the initial conditions to obtain a next generation population.
In the embodiment provided by the application, in order to obtain a more reasonable gear shifting scheme, the fitness value of each individual (namely, various gear shifting schemes) in the population can be calculated, the population with a high fitness value is selected as the next analysis process, and a better individual can be obtained by setting the probability of cross operation in the operation process during analysis. And the diversity of the population during analysis is maintained by the set mutation probability during analysis. In this example, the cross probability is 0.6 and the mutation probability is 0.01. It should be noted that, during the analysis, the cross probability and the variation probability of the algorithm may be set according to the actual application requirements, and are not limited to the values set in this embodiment.
And step S204, judging whether a termination condition is reached, if so, terminating the calculation, and taking the optimal solution obtained by analysis as a gear shifting scheme of the selected time period.
In the embodiment provided by the application, when the algorithm reaches the set maximum evolution iteration number or the set precision, the individual with the maximum fitness obtained in the evolution process can be output as the optimal solution to be used as the gear shifting scheme corresponding to the selected time period. In the subsequent gear shifting process, the gear shifting can be directly carried out according to the gear shifting scheme in the time period, so that frequent power failure gear shifting is avoided.
Referring to fig. 3, fig. 3 is a block diagram of a structure of a distribution substation gear adjusting device according to an embodiment of the present disclosure. The power distribution station area gear adjusting device 100 provided by the embodiment of the application comprises:
the obtaining module 110 is configured to obtain operation data of a power distribution line in a preset time period, where the power distribution line includes a plurality of power distribution areas, and the operation data includes a first operating gear and an initial voltage of the power distribution area before gear shifting, a second operating gear and a preset outlet voltage of the power distribution area after gear shifting.
The first analysis module 120 is configured to calculate the minimum number of times of gear shifting of the power distribution line according to a first operating gear and a second operating gear of the power distribution grid in a selected time period;
and the second analysis module 130 is configured to calculate an adjusted voltage of the power distribution grid according to the first operating position, the second operating position, and the initial voltage of the power distribution grid. The second analysis module 130 is further configured to calculate a required voltage of the power distribution area according to the current on the line of the power distribution area; obtaining a user voltage target qualification rate according to the required voltage and the regulated voltage; obtaining an outlet voltage target qualification rate according to the adjusting voltage and a preset outlet voltage;
and the third analysis module 140 is configured to analyze the minimum gear shifting times, the target qualification rate of the user voltage, and the target qualification rate of the outlet voltage on the power distribution line to obtain a target gear shifting scheme of the power distribution area on the power distribution line.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a power distribution station gear adjustment device according to an embodiment of the present disclosure.
The embodiment of the present application provides a distribution board district gear adjusting device 10, includes: data processing structure 200, bus 260, display 240, and input device 250. Data processing architecture 200 includes memory 210, memory controller 220, and processor 230. The memory 210 is used for storing a computer program and the acquired operation data of the distribution line. The memory controller 220 is used for controlling the read/write operations of the memory 210 according to the instructions of the processor 230. The processor 230 is configured to analyze the acquired operation data to obtain an optimal gear shifting scheme within the selected time period. The display 240 is used for displaying the gear shifting scheme obtained after the processing of the processor 230. The input device 250 is used for a user to set parameters in an analysis process according to needs, for example, when a multi-target discrete variable genetic algorithm is used for analysis, the fitness of each target factor in a fitness target function; the mutation probability or cross probability of the population. Bus 260 is used to enable data interaction between memory 210, memory controller 220, processor 230, display 240, and input device 250.
The Memory 210 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
To sum up, the present application provides a method and an apparatus for adjusting gear positions of distribution substations, which first obtain historical operating data of each distribution substation on a distribution line. Secondly, calculating the number of power distribution areas for executing gear shifting operation in each gear shifting process according to a first operating gear before gear shifting of each power distribution area and a second operating gear after gear shifting in historical operating data; and comparing the number of the power distribution station areas performing the gear shifting operation in each gear shifting process to obtain the minimum gear shifting times in the historical operation process. Thirdly, calculating the initial voltage of each power distribution area according to the first operating gear, the second operating gear and the initial voltage of each power distribution area before each gear shifting to obtain the adjustment voltage of each power distribution area; and calculating the required voltage of the power distribution station area according to the current after the gear shifting of each power distribution station area in the operation data. Then, calculating the user voltage qualified rate of the gear shifting process according to the required voltage and the regulated voltage of each power distribution station area on the power distribution line, and comparing the user voltage qualified rate of each gear shifting process to obtain the user voltage target qualified rate; and calculating the qualified rate of the outlet voltage of the gear shifting process according to the adjusting voltage and the preset outlet voltage and the adjusting voltage of each power distribution station area on the power distribution line, and comparing the qualified rate of the outlet voltage of each gear shifting process to obtain the target qualified rate of the outlet voltage. And finally, comprehensively analyzing historical operating data according to the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate to obtain an optimal gear shifting scheme in a corresponding time period as a uniform gear shifting scheme in the subsequent time period, so that the problem of frequent power failure and gear shifting is avoided.
The above description is only an example of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A power distribution station gear adjusting method is characterized by comprising the following steps:
the method comprises the steps that operation data of a power distribution line in a preset time period are obtained, wherein the power distribution line comprises a plurality of power distribution areas, and the operation data comprise a first in-operation gear and an initial voltage of the power distribution areas before gear shifting, a second in-operation gear of the power distribution areas after gear shifting, current of the power distribution areas on the power distribution line after gear shifting, and a preset outlet voltage of the power distribution areas;
calculating the minimum gear shifting times of the distribution line according to the first in-operation gear and the second in-operation gear;
calculating the adjusted voltage of the power distribution station area according to the first operating position, the second operating position and the initial voltage;
calculating to obtain the required voltage of the power distribution station area according to the current;
determining the target qualification rate of the user voltage of the distribution line according to the required voltage and the adjusted voltage, wherein the step specifically comprises the following steps:
comparing the required voltage with the regulated voltage, wherein if the required voltage is greater than the regulated voltage, a first comparison factor is recorded as a third value, otherwise, the first comparison factor is recorded as a fourth value, and the first comparison factor represents a comparison result of the required voltage and the regulated voltage;
calculating a user voltage qualification rate according to the first comparison factor of each power distribution area;
obtaining a user voltage target qualification rate by comparing the user voltage qualification rate, comprising:
wherein the content of the first and second substances,1indicating a minimum number of faulty user voltage shifts, a1 jiA first comparison factor, p, representing the ith station distribution area of the jth collection point1Representing the target qualification rate of the user voltage, n representing the number of the power distribution areas, and m representing the number of the acquisition points;
analyzing the target qualification rate of the outlet voltage according to the adjusting voltage and the preset outlet voltage, wherein the step specifically comprises the following steps:
comparing the regulated voltage with the preset outlet voltage, recording a second comparison factor as a fifth value if the regulated voltage is greater than the preset outlet voltage, and recording the second comparison factor as a sixth value if the regulated voltage is not greater than the preset outlet voltage, wherein the second comparison factor represents a comparison result of the regulated voltage and the preset outlet voltage;
calculating the outlet voltage qualified rate according to the second comparison factor of each power distribution area;
obtaining an outlet voltage target yield by comparing the outlet voltage yields, comprising:
2indicating the minimum number of faulty outlet voltage shifts, a2 jiA second comparison factor, p, representing the ith station distribution area of the jth collection point2Representing the target qualification rate of the outlet voltage, n representing the number of the distribution areas, and m representing the number of the collection points;
and analyzing and obtaining a target gear shifting scheme of the power distribution area on the power distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage and the target qualification rate of the outlet voltage.
2. The method of claim 1, wherein calculating the minimum number of shifts for the distribution line based on the first and second current gear positions comprises:
judging whether the first operating gear and the second operating gear of each power distribution station area are the same or not;
if the gear change factors are the same, recording the gear change factors as a first value, otherwise, recording the gear change factors as a second value, wherein the gear change factors represent the gear change condition of the distribution substation in operation;
calculating the number of the power distribution station areas for performing gear shifting operation on the power distribution line in each gear shifting process according to the gear shifting factor;
and obtaining the minimum gear shifting times by comparing the number of the power distribution station areas corresponding to each gear shifting operation of the distribution line in the preset time period.
3. The method of claim 2, wherein the step of obtaining the minimum number of shifts by comparing the number of distribution bays corresponding to each shift operation of the distribution line within the preset time period is performed by:
wherein the content of the first and second substances,3indicates the minimum number of shifts, ai 3The gear change factor of the ith power distribution station area is represented, n represents the number of the power distribution station areas on the power distribution line, and n is a positive integer.
4. The method of claim 1, wherein calculating the adjusted voltage of the distribution substation area from the first operating point, the second operating point, and the initial voltage is performed by:
wherein u isq jiIndicating the regulated voltage, k, of the ith distribution area of the jth collection pointi 0Representing the gear k of the ith distribution area on the distribution line before gear shiftingi 1Representing the gear position u of the ith distribution area on the distribution line after gear shiftingp jiRepresenting the initialization of the ith distribution area of the jth collection pointVoltage, n represents the number of distribution bays, and m represents the number of collection points.
5. The method of claim 1, wherein the calculating the required voltage of the distribution substation from the current is performed by:
wherein u isc jiThe required voltage of the ith power distribution station area of the jth collection point is shown, 198v is the base voltage of a user side, IjiCurrent, z, representing ith distribution area of jth collection pointiThe impedance of the ith power distribution station line is represented, n represents the number of the power distribution stations, and m represents the number of the acquisition points.
6. The method of claim 1, wherein analyzing the target shift schedule for the distribution grid on the distribution line based on the minimum number of shifts, the target subscriber voltage qualification rate, and the target outlet voltage qualification rate comprises:
obtaining a fitness objective function by taking the minimum gear shifting times, the user voltage target qualification rate and the outlet voltage target qualification rate as objective factors;
taking the number of gears of the power distribution area as a discrete variable;
setting a population size according to the number of the distribution areas on the distribution line;
and performing multi-target discrete variable genetic algorithm processing on the operation data according to the fitness objective function, the discrete variables and the population size to obtain a target gear shifting scheme.
7. A distribution station gear adjusting device, characterized by, includes:
the distribution line comprises a plurality of distribution areas, and the operation data comprises a first in-operation gear and an initial voltage of the distribution areas before gear shifting, a second in-operation gear of the distribution areas after gear shifting, a current of the distribution areas on the distribution lines after gear shifting and a preset outlet voltage of the distribution areas;
the first analysis module is used for calculating the minimum gear shifting times of the power distribution line according to the first operating gear and the second operating gear;
the second analysis module is used for calculating the adjusted voltage of the power distribution station area according to the first operating position, the second operating position and the initial voltage;
the second analysis module is further configured to calculate a required voltage of the power distribution grid according to the current, and obtain a target user voltage qualification rate according to the required voltage and the adjustment voltage, and specifically includes: comparing the required voltage with the regulated voltage, wherein if the required voltage is greater than the regulated voltage, a first comparison factor is recorded as a third value, otherwise, the first comparison factor is recorded as a fourth value, and the first comparison factor represents a comparison result of the required voltage and the regulated voltage; calculating a user voltage qualification rate according to the first comparison factor of each power distribution area; obtaining a user voltage target qualification rate by comparing the user voltage qualification rate, comprising:
wherein the content of the first and second substances,1indicating a minimum number of faulty user voltage shifts, a1 jiA first comparison factor, p, representing the ith station distribution area of the jth collection point1Representing the target qualification rate of the user voltage, n representing the number of the power distribution areas, and m representing the number of the acquisition points; analyzing the outlet voltage according to the regulated voltage and the preset outlet voltageThe standard qualification rate specifically comprises: comparing the regulated voltage with the preset outlet voltage, recording a second comparison factor as a fifth value if the regulated voltage is greater than the preset outlet voltage, and recording the second comparison factor as a sixth value if the regulated voltage is not greater than the preset outlet voltage, wherein the second comparison factor represents a comparison result of the regulated voltage and the preset outlet voltage; calculating the outlet voltage qualified rate according to the second comparison factor of each power distribution area; obtaining an outlet voltage target yield by comparing the outlet voltage yields, comprising:
2indicating the minimum number of faulty outlet voltage shifts, a2 jiA second comparison factor, p, representing the ith station distribution area of the jth collection point2Representing the target qualification rate of the outlet voltage, n representing the number of the distribution areas, and m representing the number of the collection points;
and the third analysis module is used for analyzing and obtaining a target gear shifting scheme of the power distribution station area on the power distribution line according to the minimum gear shifting times, the target qualification rate of the user voltage and the target qualification rate of the outlet voltage.
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