CN116683459A - Substation control method and system based on digital load prediction - Google Patents
Substation control method and system based on digital load prediction Download PDFInfo
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Classifications
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The application discloses a power distribution station control method and system based on digital load prediction, and relates to the technical field of data processing, wherein the method comprises the following steps: acquiring historical distribution data of N power distribution stations in a target area, constructing a power supply network topological graph, determining N groups of initial power supply plans, and predicting power supply loads of the N groups of initial power supply plans to obtain N power supply load prediction results; acquiring N pieces of real-time capacity information of N power distribution stations, and comparing the N pieces of real-time capacity information with N pieces of power supply load prediction results to acquire load difference values; and carrying out power supply connection of the power distribution stations according to the load difference value to obtain a connection scheme of N power distribution stations, reconstructing a power supply network topology diagram, and carrying out power supply control of the power distribution stations by using the reconstructed topology diagram. The application solves the technical problem of low power supply control efficiency caused by the redundancy of the power supply network of the power distribution station in the prior art, and achieves the technical effect of improving the power supply control efficiency by optimizing the power supply network of the power distribution station.
Description
Technical Field
The application relates to the technical field of data processing, in particular to a substation control method and system based on digital load prediction.
Background
A substation is a site that delivers electricity to consumers or customers. The transformer substation is located at the tail end of the power grid and is a point on the radial network, and the transformer substation is connected with all electric equipment. The capacity is generally small, and the voltage class is below 35 kilovolts. Most of these are scheduling, scheduling lines, and balancing the load of lines. At present, a power distribution station is used for power supply and distribution in a transmission mode that one power distribution station is connected with a plurality of load points, and a power supply network is redundant, so that power supply regulation and control are complex and low in efficiency.
Disclosure of Invention
The application provides a substation control method and system based on digital load prediction, which are used for solving the technical problem of low power supply control efficiency caused by the redundancy of a power supply network of a substation.
In a first aspect of the present application, there is provided a substation control method based on digitized load prediction, the method comprising: acquiring historical distribution data of N power distribution stations in a target area, wherein N is an integer greater than 1, and constructing a power supply network topological graph according to the historical distribution data; determining N groups of initial power supply plans based on the power supply network topological graph, wherein each group of initial power supply plans in the N groups of initial power supply plans comprises a power distribution station and a plurality of load points; carrying out power supply load prediction on the N groups of initial power supply plans to obtain N power supply load prediction results; acquiring N pieces of real-time capacity information of N power distribution stations in the N groups of initial power supply plans; comparing the N power supply load prediction results with the N real-time capacity information to obtain a load difference value, wherein the load difference value has positive and negative identifications; according to the load difference value, power distribution station power supply connection is carried out on the N power distribution stations, and a power distribution station connection scheme is obtained; reconstructing the power supply network topology map by using the power distribution station connection scheme and the N groups of initial power supply plans to obtain a reconstructed topology map, and performing power distribution station power supply control by using the reconstructed topology map.
In a second aspect of the present application, there is provided a substation control system based on digitized load prediction, the system comprising: the power supply network topology diagram construction module is used for acquiring historical power distribution data of N power distribution stations in a target area, wherein N is an integer greater than 1, and constructing a power supply network topology diagram according to the historical power distribution data; the power supply network topology map comprises N groups of initial power supply planning determining modules, wherein the N groups of initial power supply planning determining modules are used for determining N groups of initial power supply planning based on the power supply network topology map, and each group of initial power supply planning in the N groups of initial power supply planning comprises a power distribution station and a plurality of load points; the power supply load prediction result obtaining module is used for carrying out power supply load prediction on the N groups of initial power supply plans to obtain N power supply load prediction results; the real-time capacity information acquisition module is used for acquiring N pieces of real-time capacity information of N power distribution stations in the N groups of initial power supply plans; the load difference value acquisition module is used for comparing the N power supply load prediction results with the N real-time capacity information to acquire a load difference value, and the load difference value has positive and negative identifications; the power distribution station connection scheme acquisition module is used for carrying out power distribution station power supply connection on the N power distribution stations according to the load difference value to acquire a power distribution station connection scheme; the power distribution station power supply control module is used for reconstructing the power supply network topological graph according to the power distribution station connection scheme and the N groups of initial power supply plans to obtain a reconstructed topological graph, and performing power distribution station power supply control according to the reconstructed topological graph.
One or more technical schemes provided by the application have at least the following technical effects or advantages:
the application provides a power distribution station control method based on digital load prediction, which relates to the technical field of data processing, and comprises the steps of constructing a power supply network topological graph by acquiring historical power distribution data of N power distribution stations in a target area, determining N groups of initial power supply plans and obtaining N power supply load prediction results; acquiring N pieces of real-time capacity information of N power distribution stations, and comparing the N pieces of real-time capacity information with N pieces of power supply load prediction results to acquire load difference values; the power supply connection of the power distribution stations is carried out according to the load difference value, a connection scheme of N power distribution stations is obtained, the power supply network topology diagram is reconstructed, the power supply control of the power distribution stations is carried out according to the reconstructed topology diagram, the technical problem that in the prior art, the power supply control efficiency is low due to redundancy of the power supply network of the power distribution stations is solved, and the technical effect that the power supply control efficiency is improved by optimizing the power supply network of the power distribution stations is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a substation control method based on digital load prediction according to an embodiment of the present application;
fig. 2 is a schematic flow chart of determining N groups of initial power supply plans in a substation control method based on digital load prediction according to an embodiment of the present application;
fig. 3 is a schematic flow chart of obtaining N power supply load prediction results in a substation control method based on digital load prediction according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a substation control system based on digital load prediction according to an embodiment of the present application.
Reference numerals illustrate: the power supply network topology diagram construction module 11, the N groups of initial power supply planning determination modules 12, the power supply load prediction result acquisition module 13, the real-time capacity information acquisition module 14, the load difference acquisition module 15, the distribution station connection scheme acquisition module 16 and the distribution station power supply control module 17.
Detailed Description
The application provides a power distribution station control method based on digital load prediction, which is used for solving the technical problem of low power supply control efficiency caused by the redundancy of a power distribution station power supply network in the prior art.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above-described drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
As shown in fig. 1, the present application provides a substation control method based on digital load prediction, the method comprising:
s100: acquiring historical distribution data of N power distribution stations in a target area, wherein N is an integer greater than 1, and constructing a power supply network topological graph according to the historical distribution data;
specifically, by referring to the distribution records of N distribution stations in the target area, distribution data of the N distribution stations in the target area in the past period of time (may be three months, half years, one year, etc., and specific time may be adaptively adjusted according to actual conditions) including a power supply load, a power supply frequency, etc., where N is an integer greater than 1, and indicates that the number of distribution stations is greater than 1. And constructing a power supply network topological graph according to the connection relation between the N power distribution stations and the power distribution end in the historical power distribution data and the power supply and distribution condition of the N power distribution stations as the power distribution end, and taking the power supply network topological graph as basic data for carrying out power supply planning subsequently.
Further, step S100 of the embodiment of the present application further includes:
s110: extracting a plurality of load points within the target area from the historical power distribution data;
s120: extracting a first power distribution station of the N power distribution stations based on the historical power distribution data, and establishing a first mapping relation between the first power distribution station and the plurality of load points;
s130: acquiring power supply frequency information of the first power distribution station to the plurality of load points respectively based on the first mapping relation;
s140: based on the first mapping relation, the power distribution station and the load points are taken as network nodes, the power supply network topological graph is constructed, and the power supply frequency information is marked on the power supply network topological graph, wherein one load point can simultaneously identify the power supply frequency of one or more power distribution stations.
Specifically, a plurality of load points in the target area are extracted from the historical distribution data, the load points are power utilization terminals, a plurality of power utilization terminals are arranged in the target area, and the N power distribution stations are used for power supply and distribution respectively. Based on the historical distribution data, the N power distribution stations are used as first power distribution stations, according to the principle that one power distribution station supplies power to a plurality of load points, one load point possibly has the power supply of the plurality of power distribution stations, the power supply and distribution relation between the N power distribution stations in the first power distribution stations and each load point of the plurality of load points in the past period is found, the power supply and distribution relation is used as a first mapping relation, and based on the first mapping relation, the power supply frequency information of each power distribution station in the first power distribution stations to the plurality of load points is extracted respectively, wherein the power supply frequency information refers to the power supply frequency of the power distribution stations to the load points in the past period. And constructing the power supply network topology diagram by taking the first mapping relation as a communication medium and taking the power distribution station and the load point as network nodes, wherein the network topology diagram refers to a network structure diagram formed by network node equipment and the communication medium. The power supply frequency information is marked on each load point of the power supply network topological graph, for example, one load point can simultaneously identify the power supply frequency of one or more power distribution stations, and a specific identification result is determined according to actual power supply and distribution conditions in the past period of time. The power supply network topological graph reflects the power supply and distribution relation between the N power distribution stations and the plurality of load points and can be used as basic data for power supply planning.
S200: determining N groups of initial power supply plans based on the power supply network topological graph, wherein each group of initial power supply plans in the N groups of initial power supply plans comprises a power distribution station and a plurality of load points;
specifically, based on the power supply network topology diagram, the power supply relation between each power distribution station in the N power distribution stations and the corresponding multiple load points is extracted, and the load points of each power distribution station for fixed collocation power supply are screened out by comparing the power supply frequency of each power distribution station to each load point, that is, the load points for fixed power supply for each power distribution station collocation in the past power supply scheme, that is, N groups of initial power supply plans are determined, wherein the N groups of initial power supply plans comprise N groups of initial power supply plans of power distribution stations, and therefore each group of initial power supply plans comprises one power distribution station and multiple load points. The N sets of initial power supply plans may be used for subsequent power supply load predictions.
Further, as shown in fig. 2, step S200 of the embodiment of the present application further includes:
s210: setting power supply frequency constraint information;
s220: extracting the power supply frequency of the plurality of load points corresponding to the first power distribution station based on the power supply network topological graph;
s230: taking the power supply frequency constraint information as constraint conditions, and screening the plurality of load points based on the power supply frequency to obtain initial planning load points;
s240: and forming a group of initial power supply plans by the first power distribution station and the initial planning load points, and obtaining the N groups of initial power supply plans.
Specifically, based on the power supply frequency data of each power distribution station in the historical power distribution data for the multiple load points, a higher power supply frequency is selected as power supply frequency constraint information, that is, a power supply frequency threshold value, the power supply frequency constraint information is used for screening power distribution stations and load points of fixed collocation power supply in the power supply network topology graph, for example, a certain power distribution station supplies power for the load point A for 30 times in one month, supplies power for the load point B for 35 times, supplies power for the load point C for 2 times, which means that the power distribution station supplies fixed power for the load point A, B, supplies temporary power for the load point C, sets power supply frequency constraint information as 30, extracts the power supply frequency of the multiple load points corresponding to each power distribution station in the first power distribution station from the power supply network topology graph, takes the power supply frequency constraint information as constraint condition, screens the power supply frequency of the multiple load points, and keeps the power supply frequency greater than or equal to the power supply frequency constraint information as initial load points, which are used as power supply points of fixed collocation power supply points in the planning plan, and the power supply points are planned for each load point. And finding the power supply relation between N power distribution stations in the first power distribution station and the corresponding initial planning load points, namely, the initial power supply planning, namely, the power supply planning scheme used in the past, wherein N power distribution stations have the N groups of initial power supply planning. The N sets of initial power supply plans may be used for subsequent power supply load predictions.
S300: carrying out power supply load prediction on the N groups of initial power supply plans to obtain N power supply load prediction results;
specifically, according to the historical distribution data of the N groups of initial power supply plans, a power supply rule of the N power distribution stations under the N groups of initial power supply plans is calculated, and according to the power supply rule, a power supply load value required to be provided by the N power distribution stations in a period of time in the future is predicted, so that the power supply load value is used as N power supply load prediction results, and the power supply load value can be used as basic data for carrying out load difference calculation subsequently.
Further, as shown in fig. 3, step S300 of the embodiment of the present application further includes:
s310: acquiring first historical load output data of the first power distribution station of the N groups of initial power supply plans based on the historical power distribution data;
s320: acquiring a preset period;
s330: taking the preset period as a calculation node, and calculating a load output coefficient of the first power distribution station according to the first historical load output data to obtain a first load output coefficient;
s340: and carrying out power supply load prediction according to the first load output coefficient to obtain N power supply load prediction results.
Specifically, the historical load output data of each power distribution station in the N groups of initial power supply plans, that is, the power data output by each power distribution station in a past period of time is extracted from the historical power distribution data, a future power supply period is preset, which can be one day, one month and the like, and the specific time can be adaptively adjusted according to actual conditions. The preset period is used as a calculation node, the change rule of the load output of the first power distribution station in the calculation node is found, and the first load output coefficient calculation formula is built according to the change rule:wherein eta k Characterizing the first load output coefficient, P i Characterizing the output load of the first substation during the ith period, P max The maximum capacity of the first substation is characterized. The first load output coefficient, that is, the correction coefficient of the first load data, may be used to calculate the load output data within the preset period. Multiplying the first load output coefficient of each power distribution station by the corresponding first historical load output data to obtain power supply load prediction results, namely N power supply load prediction results, of each power distribution station in a preset period, which can be used as basic data for carrying out load difference calculation subsequently.
Further, step S340 of the embodiment of the present application further includes:
s341: performing variable stability analysis on a plurality of first load output coefficients to obtain a stability index;
s342: if the stability index meets the stability requirement threshold, taking the average value of a plurality of first load output coefficients as a target load output coefficient;
s343: if the stability index does not meet the stability requirement threshold, carrying out variation trend analysis on a plurality of first load output coefficients to obtain an index variation trend;
s344: predicting the target load output coefficient according to the index change trend;
s345: and carrying out power supply load prediction on a target period according to the target load output coefficient to obtain N power supply load prediction results.
Specifically, a change rule of a plurality of first load output coefficients in a past period of time is analyzed, the change rule comprises a change frequency, a change amplitude and the like, the stability of the change of the first load output coefficients is judged according to the change rule, and corresponding stability indexes are set. Setting a stability requirement threshold according to the change rule of a plurality of first load output coefficients, when the stability index accords with the stability requirement threshold, indicating that the current change frequency and change amplitude of the plurality of first load output coefficients are smaller, taking the average value of the plurality of first load output coefficients as a target load output coefficient, when the stability index does not accord with the stability requirement threshold, carrying out change trend analysis on the plurality of first load output coefficients, finding out a change rule function of the plurality of first load output coefficients, and taking the change rule function as an index change trend, thus being capable of calculating the target load output coefficient. According to the two conditions, calculating the target load output coefficient in the target period, multiplying the target load output coefficient by the corresponding first historical load output data, and obtaining the power supply load prediction results of the N power distribution stations in the target period, wherein the power supply load prediction results can be used as basic data for carrying out load difference calculation subsequently.
Further, step S341 of the embodiment of the present application further includes:
s341-1: performing numerical variation analysis on the plurality of first load output coefficients to obtain a plurality of unit increment amplitudes and a plurality of unit variation frequencies;
s341-2: performing variance calculation on the plurality of unit increment amplitudes and the plurality of unit change frequencies respectively to obtain a first variance and a second variance;
s341-3: and carrying out weighted calculation on the first variance and the second variance to obtain the stability index.
Specifically, numerical change rules of a plurality of first load output coefficients are sequentially combed, for example, unit increasing amplitude and unit changing frequency of each first load output coefficient in a preset period are extracted, a plurality of unit increasing amplitude and a plurality of unit changing frequency are obtained, variance calculation is conducted on the plurality of unit increasing amplitude and the plurality of unit changing frequency respectively, a first variance of the plurality of unit increasing amplitude and a second variance of the plurality of unit changing frequency are obtained, corresponding weight coefficients are distributed to the first variance and the second variance according to the influence degree of increasing amplitude and changing frequency on data stability, weighting calculation is conducted on the first variance and the second variance based on the weight coefficients, and the obtained weighted average value is used as the stability index and can be used for judging a calculation method of the first load output coefficient. The method for calculating the stability index may be obtained by performing standard deviation calculation or the like on the plurality of unit increase amplitudes and the plurality of unit change frequencies, and is not limited to calculation using variance.
S400: acquiring N pieces of real-time capacity information of N power distribution stations in the N groups of initial power supply plans;
specifically, an electric quantity monitoring device is installed for each power distribution station in the target area, the electric quantity monitoring device is connected with a power distribution station control system, the residual electric quantity of each power distribution station can be monitored in real time, the current electric quantity of N power distribution stations in the N groups of initial power supply plans is extracted through inquiring electric quantity monitoring information, the current electric quantity is used as N pieces of real-time capacity information, and the current electric quantity can be used as basic data for carrying out load difference calculation subsequently.
S500: comparing the N power supply load prediction results with the N real-time capacity information to obtain a load difference value, wherein the load difference value has positive and negative identifications;
specifically, the N power supply load prediction results and the current N real-time capacity information in the preset period are compared, that is, the predicted power supply quantity of each power distribution station is compared with the current residual power quantity, and the difference value between the predicted power supply quantity and the current residual power quantity, that is, the power load difference value, is calculated. The load difference value can be used as reference data for power supply control.
S600: according to the load difference value, power distribution station power supply connection is carried out on the N power distribution stations, and a power distribution station connection scheme is obtained;
further, step S600 of the embodiment of the present application further includes:
s610: extracting M power distribution stations with absolute values of the load difference values larger than a preset threshold value from the N power distribution stations, and classifying the M power distribution stations according to the positive and negative identifications to obtain classification results, wherein M is smaller than or equal to N;
s620: according to the classification result, power distribution station groups with opposite difference directions and the same absolute value of the load difference are obtained, wherein each power distribution station group comprises a first positive difference power distribution station and a first negative difference power distribution station;
s630: establishing a first power transmission line of the first positive differential substation and the first negative differential substation;
s640: and the first electric energy transmission line is used as a distribution station connection scheme.
Specifically, a load difference threshold is preset according to the numerical range of the load difference, so as to screen out the power distribution station needing to perform electric quantity regulation, and when the load difference of a certain power distribution station is 0 or a small positive value, the power distribution station can be used without excessive residual load or supplementing electric quantity, and the electric quantity regulation can be not performed. Extracting power distribution stations with absolute values of load differences larger than a preset threshold value from the N power distribution stations, wherein the power distribution stations are assumed to be extracted to obtain M power distribution stations meeting the conditions, the M power distribution stations are divided into positive difference power distribution stations and negative difference power distribution stations according to the positive and negative identifications of each power distribution station, the positive difference power distribution stations and the negative difference power distribution stations are used as classification results, the power distribution stations with opposite difference directions are extracted from the classification results, the power distribution stations with the same absolute values of the load differences are used as a power distribution station group, each power distribution station group comprises a first positive difference power distribution station and a first negative difference power distribution station, the first positive difference power distribution station and the first negative difference power distribution station can respectively comprise one or more power distribution stations with the same difference directions, and only the positive difference sum and the negative difference sum of the load differences are required to be met. And establishing a transmission line between the first positive difference distribution station and the distribution station needing to exchange electric energy in the first negative difference distribution station according to the electric quantity regulation condition of each distribution station group, wherein the transmission line is used as a first electric energy transmission line, and the first electric energy transmission line is used as a connection scheme of the distribution station in the target area and can be used as basic data of a follow-up reconstruction power supply network topological graph.
S700: reconstructing the power supply network topology map by using the power distribution station connection scheme and the N groups of initial power supply plans to obtain a reconstructed topology map, and performing power distribution station power supply control by using the reconstructed topology map.
Specifically, the transmission lines of each power distribution station in the power distribution station connection scheme and the connection relation between the N power distribution stations and the corresponding load points in the N groups of initial power supply plans are taken as communication media, the N power distribution stations and the load points are taken as network nodes, the power supply network topology map is reconstructed, the power distribution network topology map is taken as a reconstruction topology map, and the reconstruction topology map is used for power supply control of the power distribution stations, so that a power supply control network can be optimized, and the power supply control efficiency is improved.
In summary, the embodiment of the application has at least the following technical effects:
according to the application, by acquiring historical distribution data of N power distribution stations in a target area, constructing a power supply network topological graph, determining N groups of initial power supply plans and acquiring N power supply load prediction results; acquiring N pieces of real-time capacity information of N power distribution stations, and comparing the N pieces of real-time capacity information with N pieces of power supply load prediction results to acquire load difference values; and carrying out power supply connection of the power distribution stations according to the load difference value to obtain a connection scheme of N power distribution stations, reconstructing a power supply network topology diagram, and carrying out power supply control of the power distribution stations by using the reconstructed topology diagram.
The technical effect of improving the power supply control efficiency by optimizing the power supply network of the power distribution station is achieved.
Example two
Based on the same inventive concept as the substation control method based on the digital load prediction in the foregoing embodiments, as shown in fig. 4, the present application provides a substation control system based on the digital load prediction, and the system and method embodiments in the embodiments of the present application are based on the same inventive concept. Wherein the system comprises:
the power supply network topology diagram construction module 11 is used for acquiring historical power distribution data of N power distribution stations in a target area, wherein N is an integer greater than 1, and constructing a power supply network topology diagram according to the historical power distribution data;
an N-group initial power supply plan determining module 12 configured to determine N-group initial power supply plans based on the power supply network topology map, each of the N-group initial power supply plans including one power distribution station and a plurality of load points;
a power supply load prediction result obtaining module 13, configured to perform power supply load prediction on the N sets of initial power supply plans, to obtain N power supply load prediction results;
a real-time capacity information acquisition module 14, configured to acquire N pieces of real-time capacity information of N power distribution stations in the N sets of initial power supply plans;
the load difference value obtaining module 15 is configured to compare the N power supply load prediction results with the N real-time capacity information to obtain a load difference value, where the load difference value has positive and negative identifiers;
the substation connection scheme obtaining module 16 is configured to perform substation power supply connection on the N substations according to the load difference value, and obtain a substation connection scheme;
and the power distribution station power supply control module 17 is used for reconstructing the power supply network topological graph according to the power distribution station connection scheme and the N groups of initial power supply plans to obtain a reconstructed topological graph, and performing power distribution station power supply control according to the reconstructed topological graph.
Further, the system further comprises:
a load point extraction module for extracting a plurality of load points within the target area from the historical power distribution data;
the first mapping relation establishing module is used for extracting a first power distribution station in the N power distribution stations based on the historical power distribution data and establishing a first mapping relation between the first power distribution station and the plurality of load points;
the power supply frequency information acquisition module is used for acquiring power supply frequency information of the first power distribution station to the plurality of load points respectively based on the first mapping relation;
the power supply network topology diagram construction module is used for constructing the power supply network topology diagram by taking a power distribution station and a load point as network nodes based on the first mapping relation, and marking the power supply frequency information to the power supply network topology diagram, wherein one load point can simultaneously identify the power supply frequency of one or more power distribution stations.
Further, the system further comprises:
the power supply frequency constraint information setting module is used for setting power supply frequency constraint information;
the power supply frequency extraction module is used for extracting the power supply frequencies of the plurality of load points corresponding to the first power distribution station based on the power supply network topological graph;
the initial planning load point obtaining module is used for screening the plurality of load points based on the power supply frequency by taking the power supply frequency constraint information as a constraint condition to obtain initial planning load points;
and the initial power supply plan obtaining module is used for forming a group of initial power supply plans by the first power distribution station and the initial planning load points to obtain the N groups of initial power supply plans.
Further, the system further comprises:
the first historical load output data acquisition module is used for acquiring first historical load output data of the first power distribution station of the N groups of initial power supply plans based on the historical power distribution data;
the device comprises a preset period acquisition module, a control module and a control module, wherein the preset period acquisition module is used for acquiring a preset period;
the first load output coefficient obtaining module is used for calculating the load output coefficient of the first power distribution station according to the first historical load output data by taking the preset period as a calculation node to obtain a first load output coefficient;
the power supply load prediction result obtaining module is used for carrying out power supply load prediction according to the first load output coefficient to obtain the N power supply load prediction results.
Further, the system further comprises:
the stability index obtaining module is used for carrying out variable stability analysis on the plurality of first load output coefficients to obtain a stability index;
the first target load output coefficient acquisition module is used for taking the average value of the plurality of first load output coefficients as a target load output coefficient if the stability index meets a stability requirement threshold;
the change trend analysis module is used for carrying out change trend analysis on the plurality of first load output coefficients to obtain an index change trend if the stability index does not accord with a stability requirement threshold;
the second target load output coefficient acquisition module is used for predicting the target load output coefficient according to the index change trend;
and the power supply load prediction result acquisition module is used for predicting the power supply load of a target period according to the target load output coefficient to acquire the N power supply load prediction results.
Further, the system further comprises:
the numerical value change analysis module is used for carrying out numerical value change analysis on the plurality of first load output coefficients to obtain a plurality of unit increment amplitudes and a plurality of unit change frequencies;
the variance calculation module is used for calculating variances of the unit increment amplitudes and the unit change frequencies respectively to obtain a first variance and a second variance;
and the weighting calculation module is used for carrying out weighting calculation on the first variance and the second variance to obtain the stability index.
Further, the system further comprises:
the power distribution station classification module is used for extracting M power distribution stations with absolute values of the load difference values larger than a preset threshold value from the N power distribution stations, classifying the M power distribution stations according to the positive and negative identifications to obtain classification results, wherein M is smaller than or equal to N;
the power distribution station group acquisition module is used for acquiring power distribution station groups with opposite difference directions and same absolute values of the load difference values according to the classification result, and each power distribution station group comprises a first positive difference power distribution station and a first negative difference power distribution station;
the first power transmission line establishment module is used for establishing a first power transmission line of the first positive difference distribution station and the first negative difference distribution station;
and the distribution station connection scheme determining module is used for taking the first electric energy transmission line as a distribution station connection scheme.
It should be noted that the sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And the foregoing description has been directed to specific embodiments of this specification. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
The specification and figures are merely exemplary illustrations of the present application and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, the present application is intended to include such modifications and alterations insofar as they come within the scope of the application or the equivalents thereof.
Claims (8)
1. A method of substation control based on digitized load prediction, the method comprising:
acquiring historical distribution data of N power distribution stations in a target area, wherein N is an integer greater than 1, and constructing a power supply network topological graph according to the historical distribution data;
determining N groups of initial power supply plans based on the power supply network topological graph, wherein each group of initial power supply plans in the N groups of initial power supply plans comprises a power distribution station and a plurality of load points;
carrying out power supply load prediction on the N groups of initial power supply plans to obtain N power supply load prediction results;
acquiring N pieces of real-time capacity information of N power distribution stations in the N groups of initial power supply plans;
comparing the N power supply load prediction results with the N real-time capacity information to obtain a load difference value, wherein the load difference value has positive and negative identifications;
according to the load difference value, power distribution station power supply connection is carried out on the N power distribution stations, and a power distribution station connection scheme is obtained;
reconstructing the power supply network topology map by using the power distribution station connection scheme and the N groups of initial power supply plans to obtain a reconstructed topology map, and performing power distribution station power supply control by using the reconstructed topology map.
2. The method of claim 1, wherein constructing a power supply network topology from the historical power distribution data comprises:
extracting a plurality of load points within the target area from the historical power distribution data;
extracting a first power distribution station of the N power distribution stations based on the historical power distribution data, and establishing a first mapping relation between the first power distribution station and the plurality of load points;
acquiring power supply frequency information of the first power distribution station to the plurality of load points respectively based on the first mapping relation;
based on the first mapping relation, the power distribution station and the load points are taken as network nodes, the power supply network topological graph is constructed, and the power supply frequency information is marked on the power supply network topological graph, wherein one load point can simultaneously identify the power supply frequency of one or more power distribution stations.
3. The method of claim 2, wherein the determining N sets of initial power supply plans based on the power supply network topology map comprises:
setting power supply frequency constraint information;
extracting the power supply frequency of the plurality of load points corresponding to the first power distribution station based on the power supply network topological graph;
taking the power supply frequency constraint information as constraint conditions, and screening the plurality of load points based on the power supply frequency to obtain initial planning load points;
and forming a group of initial power supply plans by the first power distribution station and the initial planning load points, and obtaining the N groups of initial power supply plans.
4. The method of claim 2, wherein the predicting the power load for the N sets of initial power plans to obtain N power load prediction results includes:
acquiring first historical load output data of the first power distribution station of the N groups of initial power supply plans based on the historical power distribution data;
acquiring a preset period;
taking the preset period as a calculation node, and calculating a load output coefficient of the first power distribution station according to the first historical load output data to obtain a first load output coefficient;
and carrying out power supply load prediction according to the first load output coefficient to obtain N power supply load prediction results.
5. The method of claim 4, wherein performing power supply load prediction based on the first load output coefficient to obtain the N power supply load prediction results comprises:
performing variable stability analysis on a plurality of first load output coefficients to obtain a stability index;
if the stability index meets the stability requirement threshold, taking the average value of a plurality of first load output coefficients as a target load output coefficient;
if the stability index does not meet the stability requirement threshold, carrying out variation trend analysis on a plurality of first load output coefficients to obtain an index variation trend;
predicting the target load output coefficient according to the index change trend;
and carrying out power supply load prediction on a target period according to the target load output coefficient to obtain N power supply load prediction results.
6. The method of claim 5, wherein said performing a variable stability analysis on a plurality of said first load output coefficients to obtain a stability index comprises:
performing numerical variation analysis on the plurality of first load output coefficients to obtain a plurality of unit increment amplitudes and a plurality of unit variation frequencies;
performing variance calculation on the plurality of unit increment amplitudes and the plurality of unit change frequencies respectively to obtain a first variance and a second variance;
and carrying out weighted calculation on the first variance and the second variance to obtain the stability index.
7. The method of claim 1, wherein said connecting power between power distribution stations to said N power distribution stations according to said load difference value, obtaining a power distribution station connection scheme, comprises:
extracting M power distribution stations with absolute values of the load difference values larger than a preset threshold value from the N power distribution stations, and classifying the M power distribution stations according to the positive and negative identifications to obtain classification results, wherein M is smaller than or equal to N;
according to the classification result, power distribution station groups with opposite difference directions and the same absolute value of the load difference are obtained, wherein each power distribution station group comprises a first positive difference power distribution station and a first negative difference power distribution station;
establishing a first power transmission line of the first positive differential substation and the first negative differential substation;
and the first electric energy transmission line is used as a distribution station connection scheme.
8. A substation control system based on digitized load prediction, the system comprising:
the power supply network topology diagram construction module is used for acquiring historical power distribution data of N power distribution stations in a target area, wherein N is an integer greater than 1, and constructing a power supply network topology diagram according to the historical power distribution data;
the power supply network topology map comprises N groups of initial power supply planning determining modules, wherein the N groups of initial power supply planning determining modules are used for determining N groups of initial power supply planning based on the power supply network topology map, and each group of initial power supply planning in the N groups of initial power supply planning comprises a power distribution station and a plurality of load points;
the power supply load prediction result obtaining module is used for carrying out power supply load prediction on the N groups of initial power supply plans to obtain N power supply load prediction results;
the real-time capacity information acquisition module is used for acquiring N pieces of real-time capacity information of N power distribution stations in the N groups of initial power supply plans;
the load difference value acquisition module is used for comparing the N power supply load prediction results with the N real-time capacity information to acquire a load difference value, and the load difference value has positive and negative identifications;
the power distribution station connection scheme acquisition module is used for carrying out power distribution station power supply connection on the N power distribution stations according to the load difference value to acquire a power distribution station connection scheme;
the power distribution station power supply control module is used for reconstructing the power supply network topological graph according to the power distribution station connection scheme and the N groups of initial power supply plans to obtain a reconstructed topological graph, and performing power distribution station power supply control according to the reconstructed topological graph.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117335416A (en) * | 2023-11-24 | 2024-01-02 | 国网浙江省电力有限公司 | Method, device, equipment and storage medium for optimizing power load |
| CN117938543A (en) * | 2024-03-20 | 2024-04-26 | 国网江西省电力有限公司电力科学研究院 | Network dynamic defense method and system based on topology difference measurement |
| CN118137496A (en) * | 2024-05-06 | 2024-06-04 | 哈尔滨工业大学 | Distribution network load acquisition method, system and storage medium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117335416A (en) * | 2023-11-24 | 2024-01-02 | 国网浙江省电力有限公司 | Method, device, equipment and storage medium for optimizing power load |
| CN117335416B (en) * | 2023-11-24 | 2024-03-01 | 国网浙江省电力有限公司 | Method, device, equipment and storage medium for optimizing power load |
| CN117938543A (en) * | 2024-03-20 | 2024-04-26 | 国网江西省电力有限公司电力科学研究院 | Network dynamic defense method and system based on topology difference measurement |
| CN117938543B (en) * | 2024-03-20 | 2024-07-05 | 国网江西省电力有限公司电力科学研究院 | Network dynamic defense method and system based on topology difference measurement |
| CN118137496A (en) * | 2024-05-06 | 2024-06-04 | 哈尔滨工业大学 | Distribution network load acquisition method, system and storage medium |
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