CN113541128B - Distribution network feeder power supply transfer method, device, computer equipment and storage medium - Google Patents
Distribution network feeder power supply transfer method, device, computer equipment and storage medium Download PDFInfo
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- CN113541128B CN113541128B CN202110705290.XA CN202110705290A CN113541128B CN 113541128 B CN113541128 B CN 113541128B CN 202110705290 A CN202110705290 A CN 202110705290A CN 113541128 B CN113541128 B CN 113541128B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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Abstract
The application relates to a distribution network feeder power supply transfer method, a distribution network feeder power supply transfer device, computer equipment and a storage medium. The method comprises the following steps: acquiring the number of tripping times in a station of each feeder line in a feeder line group, wherein the feeder line group comprises more than two feeder lines, and the more than two feeder lines are connected through a contact point; determining a target outgoing feeder line of which the load needs to be outgoing in the feeder line group according to the tripping times in the station; and transferring the load of the target outgoing feeder to other feeders, wherein the other feeders are feeders except the target outgoing feeder in the feeder group. The feeder power supply transfer method of the distribution network can improve the power supply reliability.
Description
Technical Field
The present disclosure relates to the field of power systems, and in particular, to a method, an apparatus, a computer device, and a storage medium for converting feeder lines of a power distribution network to power.
Background
With the development of the power system technology, a power distribution network feeder line power supply conversion technology appears, and because the running condition of the power distribution network is complex and changeable, the number of feeder lines is large, the calculation of a power distribution network feeder line power supply conversion scheme has the auxiliary support of informationized equipment, the calculation amount of the power distribution network feeder line power supply conversion scheme is large, the calculation difficulty is large, the recognition difficulty of a feeder line group needing power supply conversion is also large, and in the traditional technology, the power supply conversion scheme is often calculated by workers and the feeder line group is recognized by experience.
However, current manual calculation of the power transfer scheme and empirical identification of the power transfer feeder sets are disadvantageous for cutting off predictable faults and for improving power reliability.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a power distribution network feeder line power conversion method, apparatus, computer device, and storage medium that can improve power supply reliability.
A power distribution network feeder power transfer method, comprising:
acquiring the number of tripping times in a station of each feeder line in a feeder line group, wherein the feeder line group comprises more than two feeder lines, and the more than two feeder lines are connected through a contact point;
determining a target outgoing feeder line of which the load needs to be outgoing in the feeder line group according to the tripping times in the station;
and transferring the load of the target outgoing feeder to other feeders, wherein the other feeders are feeders except the target outgoing feeder in the feeder group.
In one embodiment, the determining the target outgoing feeder line of the feeder line group, which needs to be outgoing load according to the number of in-station trips, includes: if the tripping times in the station are more than or equal to the preset times, the corresponding first feeder line is taken as a target outgoing feeder line; if the tripping times in the station are less than the preset times, determining whether the second feeder needs to be rotated out or not according to the fault type of the equipment on the corresponding second feeder.
In one embodiment, the determining whether the second feeder needs to be turned out according to the fault type of the device on the corresponding second feeder includes: determining whether the fault type is a critical or emergency defect; if the equipment on the second feeder has major or emergency defects, acquiring the quantity of major or emergency stuffing; if the number of the major or emergency defects is larger than or equal to the preset defect number, determining whether the second feeder needs to be rotated out according to the defect position of the major or emergency defects of the equipment on the second feeder.
In one embodiment, determining whether the second feeder needs to be rotated out according to a defect position of the device on the second feeder where a major or urgent defect occurs includes: positioning the position relation between the defect position and the upper-level stage circuit breaker according to the electric connection relation; and when the position relation indicates that the defect position is positioned in front of the upper-level circuit breaker, the corresponding second feeder line is a target outgoing feeder line needing to be subjected to outgoing load.
In one embodiment, the feeder power supply transfer method of the power distribution network further includes: and determining a target transfer feeder corresponding to each target transfer feeder so as to transfer the load of the target transfer feeder to the corresponding target transfer feeder.
In one embodiment, determining the target transfer feeder corresponding to each target transfer feeder includes: acquiring N items of mark transfer feeder lines and M other feeder lines of the feeder line group at a target moment, wherein the target moment is a moment corresponding to the maximum sum of the synchronous currents respectively corresponding to the feeder line group at different moments, and N and M are natural numbers above 1; respectively determining the sum of synchronous currents of each marking-out feeder line and each other feeder line to obtain a preset set, wherein the preset set comprises the sum of N.times.M synchronous currents; and determining a target transfer feeder corresponding to each target transfer feeder according to the preset set.
In one embodiment, the determining, according to the preset set, a target transfer feeder corresponding to each target transfer feeder includes: determining the sum of the maximum synchronous currents in the preset set; determining a current difference value between the sum of the maximum synchronous currents and a preset current; if the current difference is greater than zero, taking other feeder lines corresponding to the sum of the maximum synchronous currents as target transfer feeder lines of which targets corresponding to the sum of the maximum synchronous currents are transferred out of the feeder lines; when N is a natural number above 2, the target transfer feeder corresponding to the N-1 entry mark transfer feeder is redetermined until the target transfer feeder corresponding to each entry mark transfer feeder is determined.
A feeder transfer device, the device comprising: the acquisition module is used for acquiring a plurality of feeder lines in a plurality of feeder line groups to generate an in-station tripping event; the determining module is used for determining a target outgoing feeder line which needs to be outgoing in the feeder line group according to the tripping times in the station; and the transfer module is used for transferring the load of the target transfer feeder line to other feeder lines, wherein the other feeder lines are feeder lines except the target transfer feeder line in the feeder line group.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the method described above when the processor executes the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
According to the power distribution network feeder line power transferring method, the power distribution network feeder line power transferring device, the computer equipment and the storage medium, in the method, the feeder line group is taken as a unit, the in-station tripping times of each feeder line in the feeder line group are obtained, the feeder line needing to transfer the load in the feeder line group is determined according to the tripping event times, and therefore a feeder line load transferring scheme is obtained, and predictable faults are removed. When a tripping event occurs to a feeder line in a power distribution network, the computer equipment analyzes the serious or emergency defect of the equipment on the feeder line and analyzes the overload condition of the feeder line according to the tripping times of the feeder line, so that the transfer feeder line and the corresponding transfer feeder line are determined, the feeder line power supply transfer scheme is determined, the situation that the feeder line transfer load is calculated manually by a practitioner and the feeder line needing to be transferred is identified by working experience is avoided, and the speed and the accuracy of the calculation feeder line transfer load scheme are improved, thereby improving the reliability of power supply. In addition, the feeder lines connected to the same connecting point are used as a group of schemes for calculating the load transfer of the feeder lines, the feeder lines which need to transfer the load in the same group can transfer the load to other feeder lines through the connecting point, a new connecting point is not needed to be added, and the speed for realizing the scheme of transferring the charge of the feeder lines is greatly improved.
Drawings
FIG. 1 is an application environment diagram of a power distribution network feeder power transfer method in one embodiment;
FIG. 2 is a flow chart of a method for power distribution network feeder power transfer in one embodiment;
FIG. 3 is a schematic diagram of equipment defects on a power distribution grid feeder in one embodiment;
FIG. 4 is a schematic diagram of an overload occurring to a feeder of a distribution network in one embodiment;
FIG. 5 is a schematic structural diagram of a feeder power transfer method apparatus for a power distribution network in one embodiment;
fig. 6 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first feed line may be referred to as a second feed line, and similarly, a second feed line may be referred to as a first feed line, without departing from the scope of the present application. The first feed line and the second feed line are both feed lines, but they are not the same feed line.
The feeder power supply transfer method of the distribution network can be applied to an application environment shown in fig. 1. The power supply system comprises a power distribution station, a plurality of power supply lines, a plurality of power equipment and a power supply system, wherein the power in the power supply system is used for supplying power to users from the power distribution station through a plurality of feeder lines in the power distribution station, and the power equipment is connected to the feeder lines between the power distribution station and the users, so that the users access the power equipment into a power grid through the feeder lines. When the power equipment fails or the user accesses to the feeder line electric equipment, the corresponding feeder line outgoing switch in the power distribution station frequently trips, and at the moment, the calculation of the power supply transfer scheme of the corresponding feeder line is needed. The computer devices may be, but are not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable mobile devices.
In one embodiment, as shown in fig. 2, there is provided a feeder power supply transfer method of a power distribution network, which is described by taking application of the method to the computer device in fig. 1 as an example, and includes the following steps:
step 202, acquiring the number of tripping times in a station of each feeder line in a feeder line group, wherein the feeder line group comprises more than two feeder lines, and the more than two feeder lines are connected through a contact point.
The feeder line group comprises more than two feeder lines, the more than two feeder lines are connected through a connecting point, and generally, the feeder lines in one feeder line group independently operate, and the feeder lines in the feeder line group transfer charges through the connecting point; the connecting point refers to a connecting point for connecting at least two feeder lines, specifically, a connecting switch is used as the connecting point, and in general, the feeder lines in the same feeder line group mutually transfer loads through the connecting point; the number of tripping times in the station is the number of tripping events of the switch in the feeder station, namely the number of tripping events of the switch in the station corresponding to each feeder in the feeder group, and can be specifically a grounding tripping event or a protection action tripping event. Typically, the occurrence of a ground trip event or a protection action trip event for a feeder line will be recorded in the distribution network dispatch log. Specifically, after the computer equipment receives the notification information, the computer equipment can acquire the times of the in-station tripping events of a plurality of feeder lines in a plurality of feeder line groups in the distribution network scheduling log.
In a specific implementation, the number of tripping times in the feeder line generation station can be obtained based on a distribution network scheduling log, when the number of tripping times is obtained in the distribution network scheduling log, the number of tripping times is fixedly obtained from a preset time, specifically, the number of tripping times in the station can be fixedly obtained from 1 month 1 day each year, the type of fault is selected in the distribution network scheduling log, the type of fault is selected to be ground tripping and tripping, the fault coincidence state is selected to be full selection, the selected states are all states including states which are not finished and are finished, and one event recorded in the distribution network scheduling log is one tripping time. The tripping times of the outgoing line switch on the feeder line are obtained from the distribution network dispatching log, the in-station tripping times are sent to computer equipment through a server, and the computer equipment receives the in-station tripping times of each feeder line in the feeder line group.
And 204, determining a target outgoing feeder line of which the load needs to be outgoing in the feeder line group according to the tripping times in the station.
The in-station tripping times are times of tripping events of in-station outgoing switches corresponding to each feeder line in the feeder line group; the target outgoing feeder is a feeder in the feeder group, which needs to be subjected to load outgoing, and specifically can be an overload feeder in the feeder group or a feeder corresponding to equipment with serious or emergency defects, generally, the computer equipment determines whether the corresponding feeder can normally meet load operation according to the tripping times of the feeder, and when the corresponding feeder does not meet the load operation, the corresponding feeder is the target outgoing feeder.
Specifically, after the number of times of tripping of the feeder lines in the feeder line group is obtained by the computer equipment, determining whether the feeder lines need to be turned out of load according to the number of times of tripping of the feeder lines in the feeder line group, and if the number of times of tripping of the feeder lines in the feeder line group indicates that the feeder lines in the feeder line group need to be turned out of load, determining that the corresponding feeder lines in the corresponding feeder line group are turned out of trouser lines as targets by the computer equipment.
And 206, transferring the load of the target outgoing feeder to other feeders, wherein the other feeders are feeders except the target outgoing feeder in the feeder group.
The other feeder lines are feeder lines except the target transfer feeder line in the feeder line group, and particularly, the other feeder lines in the feeder line group can meet the normal operation of the load. In general, the fact that no tripping event occurs in the feeder lines in the feeder line group can be determined as other feeder lines, the other feeder lines can meet a certain load transfer operation in addition to the normal operation of the load per se, the specific load transfer is determined according to the actual conditions of the other feeder lines, for example, after the load transfer of the other feeder lines, the overload occurs in the other feeder lines, and obviously, the corresponding other feeder lines cannot serve as the load transferred into the feeder lines and the load transferred out of the feeder lines.
Specifically, after the computer equipment determines the target outgoing feeder in the feeder group, the computer equipment determines other feeders in the feeder group as incoming feeders, specifically determines the feeders in the other feeders as outgoing feeders, the computer equipment idles the target outgoing feeder, transfers the load of the target outgoing feeder to the incoming feeder, and transfers the load of the target outgoing feeder to the other feeders through the contact point after determining the outgoing target feeder and the other feeders.
According to the power distribution network feeder power supply transfer method, the tripping times of the feeder lines in the feeder line group are obtained, the feeder lines in the feeder line group are determined according to the tripping times, the process that a practitioner identifies the feeder lines with the load according to working experience is avoided, the feeder lines with the load can be identified quickly and accurately, after the target feeder lines with the load are identified, the load on the target feeder lines with the load are transferred to other feeder lines of the same feeder line group in the feeder line group, power supply transfer is carried out between the feeder lines through connecting points, the power supply transfer speed is increased, the feeder lines are transferred accurately and quickly, the calculated amount is greatly reduced for the practitioner, the feeder line transfer power supply scheme is obtained quickly and accurately when the feeder line faults occur, and the power distribution network stably runs. How to analyze whether the feeder needs to be turned out based on the number of feeder trips to determine the equipment defect on the feeder and how to determine the turning-in target feeder is further described below.
In one embodiment, a target outgoing feeder for which an outgoing load is required within the feeder group is determined based on the number of trips within the station. Comprising the following steps:
if the tripping times in the station are more than or equal to the preset times, the corresponding first feeder line is taken as a target to be turned out of the feeder line.
The preset number of times is a numerical value set in the computer equipment, and can be specifically determined according to a feeder operation mode, generally, when the feeder operation mode is complex, for example, if important protection equipment is connected to the feeder, the numerical value set by the computer equipment can be 2, and if the connection to the feeder is simple, the numerical value set by the computer equipment can be more than 2 natural numbers.
Specifically, the computer equipment judges whether the tripping times in the station are greater than or equal to the preset times, and if the tripping times in the station are greater than or equal to the preset times, the computer equipment determines that the corresponding first feeder line is a target outgoing feeder line in the feeder line group. At the moment, the operation mode of the first feeder line is unstable, the first feeder line trips for a plurality of times, and power supply transfer is needed for the first feeder line.
If the tripping times in the station are less than the preset times, determining whether the second feeder needs to be rotated out or not according to the fault type of the equipment on the corresponding second feeder.
Wherein the type of failure of the device on the second feeder is a major defect of the device or an emergency defect of the device.
Specifically, the computer equipment judges whether the tripping times in the station are smaller than the preset times, if the tripping times in the station are smaller than the preset times, the computer equipment determines that the equipment on the corresponding second feeder line fails, and the computer equipment determines whether the second feeder line needs to be rotated out according to the type of the failure on the corresponding second feeder line. At the moment, the operation mode of the first feeder line is unstable, the first feeder line trips for a plurality of times, and power supply transfer is needed for the first feeder line.
In the embodiment, whether the feeder line in the feeder line group is the target outgoing feeder line or not is determined through the tripping times of the feeder lines in the feeder line group, the equipment on the feeder line is determined to be faulty, whether the corresponding feeder line needs to be turned out or not is determined according to the fault type, a feeder line power supply transfer scheme can be truly, accurately and rapidly obtained, and the analysis method for tripping caused by the occurrence of major defects or emergency defects of the equipment on the missing feeder line is avoided.
In one embodiment, the determining whether the second feeder needs to be rotated out is based on a fault type of the device on the corresponding second feeder. Comprising the following steps:
determining whether the fault type is a critical or emergency defect;
when the equipment has major defects, the equipment can normally operate, but the failure of the power grid and/or the equipment can be caused by untimely treatment; when the equipment has an emergency defect, the equipment cannot operate, and the equipment is damaged, casualties, large-area power failure and/or fire accidents can be caused by untimely treatment.
Specifically, the computer device obtains whether the device on the feed line has a major or emergency defect through a device defect management module of the production system, wherein the major or emergency defect comprises a reported major or emergency defect, a non-archived major or emergency defect or a major or emergency defect with completed defect record audit.
If the equipment on the second feeder has major or emergency defects, acquiring the quantity of major or emergency stuffing;
wherein the number of significant or emergency defects is the number of devices on the second feeder where the significant or emergency defect occurred.
In particular, when the computer device determines that the type of failure of the device on the feeder is a critical or emergency defect, the computer device obtains the number of critical or critical defects through the device production management system.
If the number of the major or emergency defects is larger than or equal to the preset defect number, determining whether the second feeder needs to be rotated out according to the defect position of the major or emergency defects of the equipment on the second feeder.
The preset defect number is a numerical value set in the computer equipment, and can be specifically set to be more than 1 natural number. If the preset defect number set by the computer equipment is 1, the position of the corresponding equipment is required to be determined to determine whether the corresponding second feeder needs to be rotated out when a major or emergency defect occurs to the equipment on the feeder. The position of the serious or urgent defect of the equipment can be obtained according to the single line diagram topology analysis.
Specifically, when the computer equipment determines that the fault type of the equipment on the corresponding second feeder is a major or emergency defect, the computer equipment determines whether the number of the major or emergency defects is larger than or equal to the preset defect number of the computer equipment, and if the computer equipment determines that the number of the major or emergency defects is larger than or equal to the preset defect number of the computer equipment, the computer equipment determines whether the second feeder needs to be rotated out according to the defect position of the major or emergency defect of the equipment on the second feeder.
In this embodiment, by determining that the type of the failure occurring in the corresponding feeder is a major or emergency defect, and further determining whether to perform position analysis on the major or emergency defect occurring in the equipment on the feeder according to the number of the major or emergency defects occurring, whether the corresponding second feeder needs to be turned out is determined, it is possible to accurately determine whether the second feeder needs to perform power transfer when the major or emergency defect occurring in the equipment on the second feeder occurs, and how to determine to turn into the target feeder in other feeders in the same feeder group is described below.
In one embodiment, it is determined whether the second feeder needs to be rotated out based on a defect location at which a significant or urgent defect occurs in the device on the second feeder. Comprising the following steps:
positioning the position relation between the defect position and the upper-level stage circuit breaker according to the electric connection relation;
the electrical connection relationship is between equipment on a feeder line and the sectionalizing circuit breakers, and specifically, a feeder line is provided with a plurality of first sectionalizing circuit breakers, wherein one first sectionalizing circuit breaker controls a plurality of equipment, and the second sectionalizing circuit breakers of all the equipment are respectively connected before the plurality of equipment; the upper stage circuit breaker is a segment circuit breaker of a plurality of devices.
Specifically, after the defect position is determined according to the circuit topology diagram, the electrical connection relation between the equipment with the serious or emergency defect and the sectional circuit breaker is determined according to the defect position, the upper-level sectional circuit breaker corresponding to the equipment with the serious or emergency defect is determined according to the electrical connection relation, and the position relation between the upper-level sectional circuit breaker and the serious or emergency defect is determined according to the upper-level sectional circuit breaker.
And when the position relation indicates that the defect position is positioned in front of the upper-level circuit breaker, the corresponding second feeder line is a target outgoing feeder line needing to be subjected to outgoing load.
When the position relation indicates that the defect position is positioned in front of the upper-level circuit breaker, the upper-level circuit breaker cannot cut off the connection of the important or emergency defect equipment and the feeder line, and the corresponding feeder line is a target outgoing feeder line needing to be subjected to outgoing load.
Specifically, the computer equipment acquires the position relation between the defect position and the upper-level circuit breaker, and when the position relation indicates that the defect position is positioned in front of the upper-level circuit breaker, the computer equipment determines that the corresponding second feeder line is a target outgoing feeder line needing to be subjected to outgoing load.
In this embodiment, whether the second feeder needs to be turned out is determined by the defect position of the device on the second feeder, where the device on the feeder has a major or emergency defect, so that whether the feeder needs to be turned out of the load can be determined more accurately and truly after the device on the feeder has the major or emergency defect. As illustrated in fig. 3, the devices on the two example second feeders fail, with the device on one second feeder being located before the upper level circuit breaker, requiring the load on the corresponding feeder to be diverted; the other second feeder device is located after the upper level circuit breaker and the load on the corresponding feeder does not need to be diverted.
In one embodiment, the load of the target diverted out of the feeder is transferred to the other feeder.
Comprising the following steps:
and determining a target transfer feeder corresponding to each target transfer feeder so as to transfer the load of the target transfer feeder to the corresponding target transfer feeder.
The target transfer feeder is other feeders except the target transfer feeder in the feeder group where the target transfer feeder is located.
Specifically, after the computer equipment determines a target transfer feeder line requiring load transfer in the feeder line group according to the number of tripping times in the station, the computer equipment determines a target transfer feeder line capable of transferring load in other feeder lines of the same feeder line group so as to transfer the load on the target transfer feeder line to a corresponding target transfer feeder line.
In this embodiment, by determining the target transfer feeder, the load on the target transfer feeder is transferred to the corresponding target transfer feeder, so that the overload of the load on other feeders after the load on the target transfer feeder is transferred to other feeders is avoided. As shown in fig. 4, when the number of subscribers accessing the same feeder line in the distribution network is excessive, the feeder line is overloaded, and the in-station outgoing switch of the distribution station frequently trips.
In one embodiment, a target in-feed line corresponding to each of the target out-feed lines is determined. Comprising the following steps:
acquiring N items of mark transfer feeder lines and M other feeder lines of the feeder line group at a target moment, wherein the target moment is a moment corresponding to the maximum sum of the synchronous currents respectively corresponding to the feeder line group at different moments, and N and M are natural numbers above 1;
the current on each feeder line of the same feeder line group is positively correlated with the load of the feeder line, and when the current on the current feeder line is larger, the load of the corresponding feeder line is larger, and the load which can be transferred into the feeder line is smaller. The current in the same time is the current of all the feeders in the same feeder group at the same time, and specifically, the current of all the feeders in the same feeder group at the same time point is the current in the same time point from the acquisition of the current of all the feeders in the same feeder group. The current of all the feeders in the same feeder group is obtained, and specifically, the current of all the feeders in the same feeder group is obtained two days before.
Specifically, the computer equipment obtains synchronous currents corresponding to N item marked feeder lines and M other feeder lines in the feeder line group respectively, and when the synchronous currents corresponding to the N item marked feeder lines and the M other feeder lines in the feeder line group respectively are maximum, the corresponding moment is obtained as the target moment.
Respectively determining the sum of synchronous currents of each marking-out feeder line and each other feeder line to obtain a preset set, wherein the preset set comprises the sum of N.times.M synchronous currents;
and the preset set is a set of the sum of the contemporaneous currents of the feeder line and each other feeder line marked by each item corresponding to the target moment.
Specifically, when the computer device obtains the target time, the computer device adds the contemporaneous current of each feeder line marked by each item and the contemporaneous current of each other feeder line, and records the result in a preset set.
And determining a target transfer feeder corresponding to each target transfer feeder according to the preset set.
Specifically, when the computer equipment acquires the preset set, determining a target transfer feeder corresponding to each target transfer feeder according to the preset set.
In the embodiment, the scheme of acquiring the transfer feeder line is provided by acquiring the contemporaneous current of the feeder lines of the same feeder line group and determining the target transfer feeder line corresponding to each target transfer feeder line in the same feeder line group according to the quantity relation of the contemporaneous current of the feeder lines, so that the load on the target transfer feeder line can be quickly and accurately transferred to the target transfer feeder line, and the time for a practitioner to determine the transfer feeder line is reduced.
In one embodiment, the determining, according to the preset set, a target transfer feeder corresponding to each target transfer feeder. Comprising the following steps:
determining the sum of the maximum synchronous currents in the preset set;
specifically, after the computer device obtains the preset set, the sum of the contemporaneous currents in the preset set obtains a maximum value.
Determining a current difference value between the sum of the maximum synchronous currents and a preset current;
the preset current is a percentage of rated currents of other feeders of the same feeder group corresponding to the sum of the maximum synchronous currents, and the specific preset current can be 90% of rated currents of other feeders of the same feeder group corresponding to the sum of the maximum synchronous currents. The current difference characterizes whether each other feeder can act as a turning target feeder. Exemplary, the current difference is calculated by
I＝F 1 +F 2 -F 2 forehead ×90％
Wherein I is the current difference of the target transfer feeder, F 1 For targeting current into feed line, F 2 Current for one of the other feeders of the same feeder group, F 2 forehead To preset the current, the preset current F in the present embodiment 2 And taking the rated current of the feeder line.
Specifically, when the computer device obtains that the sum of the contemporaneous currents in the preset set is maximum, the current difference value is determined by making a difference between the sum of the maximum contemporaneous currents and the preset current.
If the current difference is greater than zero, taking other feeder lines corresponding to the sum of the maximum synchronous currents as target transfer feeder lines of which targets corresponding to the sum of the maximum synchronous currents are transferred out of the feeder lines;
specifically, after the computer equipment determines the current difference value, the computer equipment judges whether the current difference value is larger than zero, if the current difference value is larger than zero, other feeder lines corresponding to the sum of the maximum synchronous currents are taken as targets corresponding to the sum of the maximum synchronous currents, and the targets of the feeder lines are transferred into the feeder lines.
In addition, if the current difference is smaller than or equal to zero, the load of the corresponding target turning-out feeder is transferred to other feeders in other feeder groups.
And when N is a natural number above 2, re-determining the target transfer feeder corresponding to the N-1 entry mark transfer feeder until determining the target transfer feeder corresponding to each entry mark transfer feeder.
When N item mark transfer feeder lines are included in the same feeder line group, after one item mark transfer feeder line in the N item mark transfer feeder lines determines a target transfer feeder line, the target transfer feeder line transfers load to the target transfer feeder line, synchronous current on the corresponding target transfer feeder line changes, and the rest N-1 item mark transfer feeder lines need to determine the corresponding target transfer feeder line again.
Specifically, after the computer equipment determines that one item in the same feeder group marks a target transfer feeder corresponding to the transfer feeder, the computer equipment transfers the load on the target transfer feeder to the corresponding target transfer feeder and determines corresponding target transfer feeders for other target transfer feeders in the same feeder group.
In this embodiment, the target transfer feeder corresponding to each target transfer feeder is determined through the preset set, so that the target transfer feeders of the same feeder group can be accurately determined one by one, overload of other feeders is avoided after loads on the target transfer feeders are transferred to other feeders, and meanwhile, the priority of high synchronous current in the target transfer feeders is transferred, the priority of low synchronous current in other feeders is transferred, and the feeder operation is more stable.
It should be understood that, although the steps in the flowchart of fig. 2 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in fig. 2 may include a plurality of steps or stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily sequential, but may be performed in rotation or alternatively with at least a portion of the steps or stages in other steps or other steps.
In one embodiment, as shown in fig. 5, there is provided a feeder power transfer device comprising: an acquisition module 501, a determination module 502, and a transfer module 503, wherein:
an acquisition module 501, configured to acquire a plurality of feeder lines in a plurality of feeder line groups that generate an in-station trip event;
a determining module 502, configured to determine a target outgoing feeder line that needs to be outgoing in the feeder line group according to the number of tripping times in the station;
and the transferring module 503 is configured to transfer the load of the target outgoing feeder to other feeders, where the other feeders are feeders in the feeder group except for the target outgoing feeder.
In one embodiment, the determining module includes: the first determining unit is used for determining a corresponding first feeder line as a target turning feeder line when the tripping times in the station are more than or equal to the preset times; the second determining module is used for determining whether the second feeder needs to be rotated out according to the fault type of the equipment on the corresponding second feeder when the tripping times in the station are less than the preset times.
In one embodiment, the second determination unit comprises a determine failure subunit, an acquisition subunit and a determine roll-out subunit, wherein the determine failure subunit is configured to determine whether the failure type is a significant or urgent defect; the acquisition subunit is used for acquiring the quantity of the major or emergency stuffing when major or emergency defects occur to the equipment on the second feeder; and determining whether the second feeder line needs to be rotated out according to the defect position of the equipment on the second feeder line, wherein the defect position is used for determining whether the second feeder line is required to be rotated out when the number of the major or emergency defects is larger than or equal to the preset defect number.
In one embodiment, determining a positional relationship of the rotor sub-unit for locating the defect position and the upper level circuit breaker according to an electrical connection relationship; the determining and turning-out subunit is further configured to determine that the corresponding second feeder line is a target turning-out feeder line that needs to turn out a load when the positional relationship indicates that the defect position is located before the upper-level circuit breaker.
In one embodiment, a feeder power transfer device is provided, including a target transfer determination module, the transfer determination module is configured to determine a target transfer feeder corresponding to each target transfer feeder, so as to transfer a load of the target transfer feeder to the corresponding target transfer feeder.
In one embodiment, the transfer determining module comprises a current obtaining unit, a current sum determining unit and a transfer feeder unit determining, wherein the current obtaining unit is used for obtaining synchronous currents corresponding to N items of the feeder group in a target moment, namely, a feeder and M other feeders respectively, and the target moment is a moment corresponding to the maximum sum of the synchronous currents corresponding to the feeder group respectively at different moments, and both N and M are natural numbers above 1; the current summation unit is used for respectively determining the sum of the synchronous currents of each outgoing feeder line and each other feeder line of each item mark to obtain a preset set, wherein the preset set comprises the sum of N.times.M synchronous currents; the transfer feeder unit is used for determining a target transfer feeder corresponding to each target transfer feeder according to the preset set.
In one embodiment, determining the in-coming feeder unit includes determining a maximum current and subunit, determining a current difference subunit, determining a target in-coming feeder subunit, and re-determining a target in-coming feeder subunit. Wherein the maximum current determination subunit is configured to determine a sum of maximum synchronous currents in the preset set; the current difference determining subunit is used for determining the current difference between the sum of the maximum synchronous currents and the preset current; the target transfer feeder subunit is determined to be used for taking other feeders corresponding to the sum of the maximum contemporaneous currents as target transfer feeder corresponding to the sum of the maximum contemporaneous currents when the current difference value is larger than zero; and the redetermining target transfer feeder subunit is used for redetermining the target transfer feeder corresponding to the N-1 entry transfer feeder when N is a natural number above 2 until the target transfer feeder corresponding to each entry transfer feeder is determined.
For specific limitations of the feeder power transfer device, reference may be made to the above limitations of the feeder power transfer method of the power distribution network, and no further description is given here. The various modules in the feeder power transfer device described above may be implemented in whole or in part in software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 6. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer equipment is used for storing the tripping times of the distribution feeder, the feeder current and the feeder operation mode data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a distribution grid feeder power transfer method.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the computer device to which the present application is applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, there is also provided a computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the method embodiments described above when the computer program is executed.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the steps of the method embodiments described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A power distribution network feeder power transfer method, the method comprising:
acquiring the number of tripping times in a station of each feeder line in a feeder line group, wherein the feeder line group comprises more than two feeder lines, and the more than two feeder lines are connected through a contact point;
determining a target outgoing feeder line of which the load needs to be outgoing in the feeder line group according to the tripping times in the station;
determining a target transfer feeder corresponding to each target transfer feeder to transfer the load of the target transfer feeder to the corresponding target transfer feeder, comprising: acquiring N items of mark transfer feeder lines and M other feeder lines of the feeder line group at a target moment, wherein the target moment is a moment corresponding to the maximum sum of the synchronous currents respectively corresponding to the feeder line group at different moments, and N and M are natural numbers above 1; respectively determining the sum of synchronous currents of each marking-out feeder line and each other feeder line to obtain a preset set, wherein the preset set comprises the sum of N.times.M synchronous currents;
determining a target transfer feeder corresponding to each target transfer feeder according to the preset set, including: determining the sum of the maximum synchronous currents in the preset set; determining a current difference value between the sum of the maximum synchronous currents and a preset current; if the current difference is greater than zero, taking other feeder lines corresponding to the sum of the maximum synchronous currents as target transfer feeder lines of which targets corresponding to the sum of the maximum synchronous currents are transferred out of the feeder lines; when N is a natural number above 2, re-determining a target transfer feeder corresponding to the N-1 entry mark transfer feeder until determining a target transfer feeder corresponding to each entry mark transfer feeder;
and transferring the load of the target outgoing feeder to other feeders, wherein the other feeders are feeders except the target outgoing feeder in the feeder group.
2. The method of claim 1, wherein said determining a target outgoing feeder within said feeder group that requires outgoing load based on an in-station trip count comprises:
if the tripping times in the station are more than or equal to the preset times, the corresponding first feeder line is taken as a target outgoing feeder line;
if the tripping times in the station are less than the preset times, determining whether the second feeder needs to be rotated out or not according to the fault type of the equipment on the corresponding second feeder.
3. The method of claim 2, wherein determining whether the second feeder needs to be rotated out according to the type of fault of the device on the corresponding second feeder comprises:
determining whether the fault type is a critical or emergency defect;
if the equipment on the second feeder has a major or emergency defect, acquiring the number of the major or emergency defects;
if the number of the major or emergency defects is larger than or equal to the preset defect number, determining whether the second feeder needs to be rotated out according to the defect position of the major or emergency defects of the equipment on the second feeder.
4. A method according to claim 3, determining whether the second feeder needs to be rotated out based on a defect location where a significant or urgent defect occurs in the device on the second feeder, comprising:
positioning the position relation between the defect position and the upper-level stage circuit breaker according to the electric connection relation;
and when the position relation indicates that the defect position is positioned in front of the upper-level circuit breaker, the corresponding second feeder line is a target outgoing feeder line needing to be subjected to outgoing load.
5. The method of claim 1, wherein the target-in feeder is other feeders than the target-out feeder in a feeder group in which the target-out feeder is located.
6. The method of claim 1, wherein the predetermined set is a set of numbers that mark the sum of contemporaneous currents of the feeder line and each other feeder line for each entry corresponding to the target time.
7. The method of claim 1, wherein the predetermined current is a percentage of a rated current of other feeders of the same feeder group corresponding to a sum of maximum contemporaneous currents.
8. A feeder power transfer device, the device comprising:
the acquisition module is used for acquiring a plurality of feeder lines in a plurality of feeder line groups to generate an in-station tripping event;
the determining module is used for determining a target outgoing feeder line which needs to be outgoing in the feeder line group according to the tripping times in the station; determining a target transfer feeder corresponding to each target transfer feeder to transfer the load of the target transfer feeder to the corresponding target transfer feeder, comprising: acquiring N items of mark transfer feeder lines and M other feeder lines of the feeder line group at a target moment, wherein the target moment is a moment corresponding to the maximum sum of the synchronous currents respectively corresponding to the feeder line group at different moments, and N and M are natural numbers above 1; respectively determining the sum of synchronous currents of each marking-out feeder line and each other feeder line to obtain a preset set, wherein the preset set comprises the sum of N.times.M synchronous currents; determining a target transfer feeder corresponding to each target transfer feeder according to the preset set, including: determining the sum of the maximum synchronous currents in the preset set; determining a current difference value between the sum of the maximum synchronous currents and a preset current; if the current difference is greater than zero, taking other feeder lines corresponding to the sum of the maximum synchronous currents as target transfer feeder lines of which targets corresponding to the sum of the maximum synchronous currents are transferred out of the feeder lines; when N is a natural number above 2, re-determining a target transfer feeder corresponding to the N-1 entry mark transfer feeder until determining a target transfer feeder corresponding to each entry mark transfer feeder;
and the transfer module is used for transferring the load of the target transfer feeder line to other feeder lines, wherein the other feeder lines are feeder lines except the target transfer feeder line in the feeder line group.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| CN112434905A (en) * | 2020-10-26 | 2021-03-02 | 天津大学 | Power distribution system power supply capacity evaluation method considering influence of multiple power transfer on reliability |
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