CN115952981A - Transmission and distribution system planning auxiliary system - Google Patents
Transmission and distribution system planning auxiliary system Download PDFInfo
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Abstract
The invention discloses a transmission and distribution system planning auxiliary system, which comprises: the system comprises a management and control center and a database, wherein the management and control center is in communication connection with a data acquisition module, an existing power grid analysis module, a load prediction module, a power grid planning module and an evaluation module, the database is used for storing data generated by the modules, the data acquisition module acquires historical power grid distribution maps, original data and basic information of power grid equipment through a document scanner, the existing power grid analysis module and the load prediction module analyze the existing power grid and predict future annual load capacity based on the data acquired by the data acquisition module, the power grid planning module optimizes the existing power grid planning scheme based on the existing power grid analysis result and the future annual load capacity, and the evaluation module calculates the reliability of a new power grid planning scheme through a trend calculation method. The power grid system can stably calculate and analyze faults, does not relate to the dynamic characteristics and the transition process of system elements, and improves the reliability of power grid planning.
Description
Technical Field
The invention relates to the technical field of power grid planning, in particular to a transmission and distribution system planning auxiliary system.
Background
In recent years, with the continuous development of economy and the continuous improvement of the living standard of people, the demand of electric power is more and more increased, and the requirement of electric power quality is more and more increased.
In the aspect of planning and designing the power grid at the present stage, the reliability and the safety of a planning scheme are evaluated by adopting an N-1 criterion, and the analysis method has certain defects, such as incapability of effectively reflecting specific fault information of the power. Therefore, a better evaluation scheme for the planning reliability of the power grid is needed, and various problems occurring during power supply of the power grid can be effectively solved.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and title of the application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above-mentioned conventional problems.
Therefore, the invention provides a transmission and distribution system planning auxiliary system which solves the problem that the existing power grid planning cannot effectively reflect the specific fault information of the electric power.
In order to solve the technical problems, the invention provides the following technical scheme:
the embodiment of the invention provides a transmission and distribution system planning auxiliary system, which comprises: the system comprises a control center, a data acquisition module, an existing power grid analysis module, a load prediction module, a power grid planning module, an evaluation module and a database;
the management and control center is in communication connection with the data acquisition module, the existing power grid analysis module, the load prediction module, the power grid planning module and the evaluation module, and monitors and controls distribution network information generated by each module in real time;
the data acquisition module is used for acquiring the information of the power grid planning scheme in real time;
the existing power grid analysis module is used for analyzing the existing power grid according to the power grid planning scheme acquired by the data acquisition module;
the load prediction module is used for predicting the total load and the space load and predicting the load capacity of the future year according to the prediction result;
the power grid planning module is used for modifying the existing power grid planning scheme according to the load prediction result to obtain a new power grid planning scheme;
the evaluation module is used for evaluating the reliability of the obtained new power grid planning scheme;
and the database is used for storing the data generated by each module.
As a preferable scheme of the transmission and distribution system planning assistance system of the present invention, wherein: the existing grid analysis module includes: and acquiring a power grid planning scheme through the database, and analyzing the acquired power grid planning scheme by the conventional power grid analysis module based on the conventional power supply general profile, the power grid structural circuit and equipment safety of the power grid.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the existing grid analysis module further comprises: the existing power grid analysis module analyzes the safety of the existing power grid structural lines and equipment and uploads all generated analysis data to a database;
the existing power grid analysis module is electrically connected with the data acquisition module, when the existing power grid analysis module analyzes an existing power grid structural line, the existing power grid analysis module acquires a historical power grid distribution diagram and original data through the data acquisition module, determines the power supply coverage area of each transformer substation according to the historical power grid distribution diagram and the original data, and further calculates the average coverage area of the transformer substation through the existing power grid analysis module;
the control center is electrically connected with the existing power grid analysis module, when the existing power grid analysis module calculates the average coverage area of the transformer substation, the control center monitors the obtained average coverage area of the transformer substation, and if the average coverage area of the transformer substation is lower than the average radiation area, the setting label of the transformer substation is 'optimized site selection';
before a transformer substation is labeled, the data acquisition module acquires natural geographical position data of region data in original data, and marks the acquired data on a historical power grid distribution map, the control center marks an area which does not accord with a transformer substation site as a first color to show that the area does not accord with a transformer substation construction standard, the control center marks the area which accords with the transformer substation site as a second color to show that the area accords with the transformer substation construction standard, and the first color and the second color are colors with different hues;
the existing power grid analysis module analyzes equipment safety, acquires power system information and basic information of power grid equipment through the data acquisition module, acquires the operating years of the transformer substation based on the power system information stored in the database and monitors the operating years through the management and control center;
when the service life of the power grid equipment in the transformer substation reaches the service life, the power grid equipment is marked as a label of equipment needing to be checked, and the service life is determined by the damage degree of the power grid equipment.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the existing grid analysis module further comprises:
calculating population density of the region according to region data information in the original data;
setting population density threshold values, and monitoring and dividing electricity utilization conditions of electricity utilization areas by the control center;
when the population density is higher than or equal to the population density threshold value, marking the area as a high power utilization area;
when the population density is lower than a threshold value, marking the area as a low power utilization area;
the high power utilization area and the low power utilization area are marked with different marks and marked on a historical power grid distribution diagram;
according to the power supply amount and the power supply power of the transformer substation for each area marked on the historical circuit distribution diagram, calculating the average power supply power of the area;
if the power supply power of a certain area is lower than the average power supply power, the area is marked as an optimized area.
As a preferable scheme of the transmission and distribution system planning assistance system of the present invention, wherein: the data acquisition module comprises: acquiring a historical power grid distribution map, original data and power grid equipment information of a power grid, scanning and reading power grid planning scheme information through document scanning equipment, and transmitting the acquired information data to a database for storage;
according to historical power grid distribution data in the data acquisition module, different power grid voltages of various regions are divided into regular or irregular regions with corresponding sizes, and geographic positions, the number and the generation time of regional population and load distribution are predicted based on regional data acquired by the data acquisition module.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the data acquisition module still includes: the historical power grid distribution map is divided into a first-level regional power grid distribution map, a second-level regional power grid distribution map and a third-level regional power grid distribution map according to regional grades;
the first, second and third level areas are in accordance with 20:15:5, labeling and connecting the proportional chromaticities, and labeling the transformer substation based on 130% of the labeling chromaticities of the first level region, the second level region and the third level region;
the acquisition of the original data comprises region data information, load data information and power system information;
the basic information of the power grid equipment comprises the price, the rated power and the service life of the power grid equipment;
the first level region is a city level region, the second level region is a county level region, and the third level region is a village level region.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the load prediction module includes: the load prediction module predicts the total load and the space load of the power grid;
the load prediction module is electrically connected with the data acquisition module, when the load prediction module predicts the total load, a simple exponential smoothing method is carried out on load data information, load current situation information and historical power grid distribution diagram related data in a planning period in the load data information obtained by the data acquisition module, and a year weight is set;
when the load prediction module predicts the space load, the power supply range is calculated according to the historical power grid distribution map, the regional data information and the power system information, the calculation results of the simple exponential smoothing method are summarized, and the prediction results are adjusted by adopting a bottom-up method.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the load prediction module further comprises: the load prediction module predicts the load capacity of the future year;
setting regional load density according to regional related data, dividing the regional load density into a first regional load density, a second regional load density and a third regional load density, and dividing the regional related data into three data sets from small to large, wherein the three data sets are a first data set, a second data set and a third data set respectively;
when the region-related data is in the first data set, the load of the region is the product of the first region load density and the region area;
when the region-related data is in the second data set, the load of the region is the product of the second region load density and the region area;
when the region-related data is in the third data set, the load of the region is the product of the load density of the third region and the area of the region;
the load capacity of the future year is the product of loads of different regions and corresponding concurrence rates.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the power grid planning module comprises: the existing power grid planning scheme is modified,
the power grid planning module is electrically connected with the database, acquires data generated by each module from the database, and sets installed capacity of a power plant as available power supply amount in a historical power grid distribution diagram;
when the power grid equipment in the power grid planning module needs to be optimized and checked, a user edits the set labels 'optimized site selection' and 'equipment needing to be checked' through the database.
And after the user determines a new power grid planning scheme, the power grid planning module recalculates the price of the equipment required by the new substation site selection to obtain an optimal budget result.
As a preferable solution of the transmission and distribution system planning assistance system of the present invention, wherein: the evaluation module comprises: evaluating a new optimal budget power grid planning scheme planned by the power grid planning module; the evaluation module is electrically connected with the power grid planning module, the evaluation module is electrically connected with the database, the evaluation module acquires a new power grid planning scheme from the power grid planning module, acquires original data, total load prediction, space load prediction and future year load prediction data from the database, and judges whether the bus voltage, branch current and power of the power grid are out of limit by adopting a tidal current calculation method, and if the bus voltage, branch current and power of the power grid are out of limit, measures are taken to adjust the operation mode.
Compared with the prior art, the invention has the beneficial effects that: the total load prediction and the space load prediction are used as calculation bases, the annual load quantity in the future is calculated, and the uniformity of the space load prediction result and the total load prediction result is ensured on the premise of considering the natural environment of the region; the new power grid planning scheme is evaluated through the power flow calculation method, the power grid system can stably calculate and analyze faults, the dynamic characteristics and the transition process of system elements are not involved, and the reliability of power grid planning is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic diagram of a system structure of a distribution system planning assistance system according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not necessarily enlarged to scale, and are merely exemplary, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Also in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a transmission and distribution system planning assistance system, including: the system comprises a management and control center 100, a data acquisition module 200, an existing power grid analysis module 300, a load prediction module 400, a power grid planning module 500, an evaluation module 600 and a database 700;
the management and control center 100 is in communication connection with the data acquisition module 200, the existing power grid analysis module 300, the load prediction module 400, the power grid planning module 500 and the evaluation module 600, and supervises and controls the distribution network information generated by each module in real time;
the data acquisition module 200 is used for acquiring information of a power grid planning scheme in real time;
the existing power grid analysis module 300 is configured to analyze an existing power grid according to the power grid planning scheme acquired by the data acquisition module 200;
the load prediction module 400 is used for predicting the total load and the space load and predicting the load capacity of the future year according to the prediction result;
the power grid planning module 500 is used for modifying the existing power grid planning scheme according to the load prediction result to obtain a new power grid planning scheme;
an evaluation module 600, configured to evaluate reliability of the obtained new power grid planning scheme;
and the database 700 is used for storing the data generated by each module.
Further, the existing grid analysis module 300 includes: the power grid planning scheme is obtained through the database 700, and the existing power grid analysis module 300 analyzes the obtained power grid planning scheme on the existing power grid, wherein the analysis is based on the existing power supply profile of the power grid, the power grid structural lines and the equipment safety.
Further, the existing grid analysis module 300 further includes: the existing power grid analysis module 300 analyzes the existing power grid structure line and equipment safety, and uploads all generated analysis data to the database 700;
the existing power grid analysis module 300 is electrically connected with the data acquisition module 200, when the existing power grid analysis module 300 analyzes an existing power grid structural line, the existing power grid analysis module 300 acquires a historical power grid distribution map and original data through the data acquisition module 200, determines the power supply coverage area of each transformer substation according to the historical power grid distribution map and the original data, and further calculates the average coverage area of the transformer substation through the existing power grid analysis module 300;
the control center 100 is electrically connected with the existing power grid analysis module 300, when the existing power grid analysis module 300 calculates the average coverage area of the transformer substation, the control center 100 monitors the obtained average coverage area of the transformer substation, and if the average coverage area of the transformer substation is lower than the average radiation area, the power substation sets a label "optimized site selection";
before a transformer substation is labeled, a data acquisition module 200 acquires natural geographical position data of region data in original data, and marks the acquired data on a historical power grid distribution diagram, a control center 100 marks a region which does not accord with a transformer substation site as a first color to indicate that the region does not accord with a transformer substation construction standard, the control center 100 marks the region which accords with the transformer substation site as a second color to indicate that the region accords with the transformer substation construction standard, and the first color and the second color are colors with different hues;
the existing power grid analysis module 300 analyzes equipment safety, acquires power system information and basic information of power grid equipment through the data acquisition module 200, acquires the operating years of the transformer substation based on the power system information stored in the database 700, and monitors the operating years through the management and control center 100;
when the service life of the power grid equipment in the transformer substation reaches the service life, the power grid equipment is marked as a label of equipment needing to be checked, and the service life is determined by the damage degree of the power grid equipment.
Further, the existing grid analysis module 300 further includes:
calculating population density of the region according to region data information in the original data;
setting population density threshold values, and monitoring and dividing electricity utilization conditions of electricity utilization areas by the control center 100;
when the population density is higher than or equal to the population density threshold value, marking the area as a high power utilization area;
when the population density is lower than a threshold value, marking the area as a low power utilization area;
the high power utilization area and the low power utilization area are marked with different marks and marked on a historical power grid distribution map;
according to the power supply amount and the power supply power of the transformer substation for each area marked on the historical circuit distribution diagram, calculating the average power supply power of the area;
if the power supply power of a certain area is lower than the average power supply power, marking the area as an optimized area.
Further, the data collection module 200 includes: acquiring a historical power grid distribution map, original data and power grid equipment information of a power grid, scanning and reading power grid planning scheme information through document scanning equipment, and transmitting the acquired information data to the database 700 for storage;
according to historical power grid distribution data in the data acquisition module 200, different power grid voltages of various regions are divided into regular or irregular regions with corresponding sizes, and geographic positions, the number and the generation time of regional population and load distribution are predicted based on regional data acquired by the data acquisition module 200.
Further, the data collection module 200 further includes: dividing the historical power grid distribution map into a first-level regional power grid distribution map, a second-level regional power grid distribution map and a third-level regional power grid distribution map according to regional grades;
the first, second and third level areas are in accordance with 20:15:5, marking and connecting the proportional chromaticities, and marking 130% of the marked chromaticities of the first level region, the second level region and the third level region by the transformer substation;
the acquisition of the original data comprises region data information, load data information and power system information;
specifically, the regional data information includes information related to the natural geographic position of the region, such as the area, longitude and latitude, vegetation type and coverage area; administrative region information, such as regional population number, population residence; the load data information comprises the current load information of the region and the load data information in the planning period; the load current status information comprises power supply amount information and load change curve information; the load data information during the planning period includes a historical annual load trend graph.
The basic information of the power grid equipment comprises the price, the rated power and the service life of the power grid equipment;
it should be noted that the power grid equipment includes power transformers, switches, disconnecting links, buses, GIS, HGIS, and voltage transformers.
The first level area is a city level area, the second level area is a county level area, and the third level area is a village level area.
Further, the load prediction module 400 includes: the load prediction module 400 predicts the total load and the space load of the power grid;
the load prediction module 400 is electrically connected with the data acquisition module 200, when the load prediction module 400 predicts the total load, a simple exponential smoothing method is performed on load data information, load current situation information and historical power grid distribution diagram related data in a planning period in the load data information obtained by the data acquisition module 200, and a year weight is set;
it should be noted that, for data in the historical year load trend graph, the data weight values which are set to be smaller the longer the year is, the data weight values which are set to be larger the more recent the year are, and the total load predicted value is calculated through a weighted average value, wherein the weight values decrease exponentially from the early stage to the late stage along with the year, and the specific relation is expressed as:
wherein, alpha is a smoothing parameter and alpha belongs to (0, 1),
for the total load prediction, the year at time T +1 is the time sequence y 1 ，y 2 ，……，y T The rate of weight drop is controlled by a smoothing parameter alpha.
The space load prediction calculates a power supply range according to a historical power grid distribution diagram, region data information and electric power system information;
according to different power grid voltages of each region in the historical power grid distribution diagram, the historical power grid distribution diagram is divided into regular or irregular regions with corresponding sizes, and geographic positions, the number and the generation time of regional population and load distribution are predicted based on region related data.
Further, when the load prediction module 400 predicts the space load, the power supply range is calculated according to the historical power grid distribution map, the regional data information, and the power system information, the calculation results of the simple exponential smoothing method are summarized, and the prediction results are adjusted by a bottom-up method.
Further, the load prediction module 400 further comprises: the load prediction module 400 predicts the load capacity in the future year;
setting regional load density according to regional related data, dividing the regional load density into a first regional load density, a second regional load density and a third regional load density, and dividing the regional related data into three data sets from small to large, wherein the three data sets are a first data set, a second data set and a third data set respectively;
when the region-related data is in the first data set, the load of the region is the product of the first region load density and the region area;
when the region-related data is in the second data set, the load of the region is the product of the second region load density and the region area;
when the region-related data is in the third data set, the load of the region is the product of the load density of the third region and the area of the region;
the load capacity of the future year is the product of loads of different regions and corresponding coincidence rates.
Further, the grid planning module 500 includes: the existing power grid planning scheme is modified,
the power grid planning module 500 is electrically connected with the database 700, the power grid planning module 500 acquires data generated by each module from the database 700, and for a historical power grid distribution diagram, the installed capacity of a power plant is set as a power supply amount;
when the power grid equipment in the power grid planning module 500 needs to be optimized and checked, the user edits the set labels "optimizable site selection" and "equipment to be checked" through the database 700.
After the user determines a new power grid planning scheme, the power grid planning module 500 recalculates the price of the equipment required for the new site selection of the transformer substation, and obtains an optimal budget result.
It should be noted that, in the historical power grid distribution map, the installed capacity of the power plant is set as the available power, the user can edit the "location capable of being optimized" and the "equipment to be checked" provided with the labels, wherein the "location capable of being optimized" can be located in the area without the red mark, the power utilization area is reconnected based on the new substation location, the power grid planning module 500 calls the existing power grid analysis module 300 to calculate the coverage area of the new substation location, and calculates the power utilization load of the area based on the load total prediction, the space load prediction and the future year load prediction, and the calculation result is displayed in the power grid planning module in real time, so that the user can conveniently and intuitively know the new substation location change effect.
It should be further noted that, for the "device to be inspected", the power grid planning module 500 compares the device with the "device to be inspected" label based on the basic information of the power grid device, and if there is a device of the same type with a lower price or a device that is updated, the device with the "device to be inspected" label may be replaced.
Further, the evaluation module 600 includes: evaluating a new optimal budget power grid planning scheme planned by the power grid planning module 500; the evaluation module 600 is electrically connected with the power grid planning module 500, the evaluation module 600 is electrically connected with the database 700, the evaluation module 600 acquires a new power grid planning scheme from the power grid planning module 500, acquires original data, total load prediction, space load prediction and future year load prediction data from the database 700, and judges whether the voltage, branch current and power of a power grid bus are out of limit or not by adopting a tidal current calculation method, and if the voltage, branch current and power are out of limit, measures are taken to adjust the operation mode.
It should be noted that the evaluation module 600 performs evaluation calculation on the new power grid planning scheme by using a power flow calculation method, and in an actual power grid system, the evaluation calculation is based on the rated power and load of the power plant in the original data, and the rated power generally does not change with the change of the node voltage; the relation between the injection power and the injection load of each node is expressed as follows:
S i ＝P i +jQ i ＝U i I i
wherein, P i And Q i Active and reactive power injected into the grid for node i, respectively, P when i is a power plant node i >0; when i is a load node, P i <0; when i is the load node P i When =0, Q i ＝0；U i And I i Respectively, the node voltage phasor and the conjugate of the node injection current phasor.
Example 2
Referring to table 1, for an embodiment of the present invention, an auxiliary system for planning a transmission and distribution system is provided, and the beneficial effects of the present invention are verified through scientific experiments.
The experimental data are shown in table 1:
TABLE 1 regional load prediction data
Obtaining the load of each area of A/B/C according to the area load density and the area by the area related data in the table 1, and obtaining the load of the future year by multiplying the load of all divided areas by the concurrence rate; the planning scheme for evaluating the power grid is carried out through the flow calculation method, and the reliability of power grid planning can be improved under the condition that the dynamic characteristics and transition of system elements are not involved.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A transmission and distribution system planning assistance system, comprising: the system comprises a management and control center (100), a data acquisition module (200), an existing power grid analysis module (300), a load prediction module (400), a power grid planning module (500), an evaluation module (600) and a database (700);
the management and control center (100) is in communication connection with the data acquisition module (200), the existing power grid analysis module (300), the load prediction module (400), the power grid planning module (500) and the evaluation module (600), and supervises and controls distribution network information generated by the modules in real time;
the data acquisition module (200) is used for acquiring the information of the power grid planning scheme in real time;
the existing power grid analysis module (300) is used for analyzing the existing power grid according to the power grid planning scheme acquired by the data acquisition module (200);
the load prediction module (400) is used for predicting the total load and the space load and predicting the load quantity of the future year according to the prediction result;
the power grid planning module (500) is used for modifying the existing power grid planning scheme according to the load prediction result to obtain a new power grid planning scheme;
an evaluation module (600) for evaluating the reliability of the obtained new grid planning scheme;
and the database (700) is used for storing the data generated by the modules.
2. The transmission and distribution system planning assistance system according to claim 1, wherein the existing grid analysis module (300) comprises: and acquiring a power grid planning scheme through the database (700), wherein the existing power grid analysis module (300) analyzes the acquired power grid planning scheme for the existing power grid, and the analysis is based on the power source general profile, the power grid structural circuit and the equipment safety of the existing power grid.
3. The transmission and distribution system planning assistance system according to claim 1 or 2, wherein the existing grid analysis module (300) further comprises: the existing power grid analysis module (300) analyzes the safety of the existing power grid structural lines and equipment and uploads all generated analysis data to the database (700);
the existing power grid analysis module (300) is electrically connected with the data acquisition module (200), when the existing power grid analysis module (300) analyzes an existing power grid structural line, the existing power grid analysis module (300) acquires a historical power grid distribution diagram and original data through the data acquisition module (200), determines the power supply coverage area of each transformer substation according to the historical power grid distribution diagram and the original data, and further calculates the average coverage area of the transformer substation through the existing power grid analysis module (300);
the control center (100) is electrically connected with the existing power grid analysis module (300), when the existing power grid analysis module (300) calculates the average coverage area of the transformer substation, the control center (100) monitors the obtained average coverage area of the transformer substation, and if the average coverage area of the transformer substation is lower than the average radiation area, the setting label of the power station is 'optimized site selection';
before a transformer substation is labeled, the data acquisition module (200) acquires natural geographic position data of region data in original data, and marks the acquired data on a historical power grid distribution diagram, the control center (100) marks a region which does not accord with the site selection of the transformer substation as a first color to indicate that the region does not accord with the construction standard of the transformer substation, the control center (100) marks the region which accords with the site selection of the transformer substation as a second color to indicate that the region accords with the construction standard of the transformer substation, and the first color and the second color are colors with different hues;
the existing power grid analysis module (300) analyzes equipment safety, acquires power system information and basic information of power grid equipment through the data acquisition module (200), acquires the operating years of a transformer substation based on the power system information stored in the database (700), and monitors the operating years through the control center (100);
when the service life of the power grid equipment in the transformer substation reaches the service life, the power grid equipment is marked as a label of equipment needing to be checked, and the service life is determined by the damage degree of the power grid equipment.
4. The transmission and distribution system planning assistance system according to claim 2 or 3, wherein the existing grid analysis module (300) further comprises:
calculating according to the region data information in the original data to obtain the population density of the region;
setting population density threshold values, and monitoring and dividing electricity utilization conditions of electricity utilization areas by the control center (100);
when the population density is higher than or equal to the population density threshold value, marking the area as a high power utilization area;
when the population density is lower than a threshold value, marking the area as a low power utilization area;
the high power utilization area and the low power utilization area are marked with different marks and marked on a historical power grid distribution diagram;
according to the power supply amount and the power supply power of the transformer substation for each area marked on the historical circuit distribution diagram, calculating the average power supply power of the area;
if the power supply power of a certain area is lower than the average power supply power, marking the area as an optimized area.
5. The transmission and distribution system planning assistance system according to claim 4, wherein the data acquisition module (200) comprises: acquiring a historical power grid distribution map, original data and power grid equipment information of a power grid, scanning and reading power grid planning scheme information through document scanning equipment, and transmitting the acquired information data to a database (700) for storage;
according to historical power grid distribution data in a data acquisition module (200), different power grid voltages of various regions are divided into regular or irregular regions with corresponding sizes, and geographic positions, the number and the generation time of regional population and load distribution are predicted based on the regional data acquired by the data acquisition module (200).
6. The transmission and distribution system planning assistance system of claim 5, wherein the data acquisition module (200) further comprises: the historical power grid distribution map is divided into a first-level regional power grid distribution map, a second-level regional power grid distribution map and a third-level regional power grid distribution map according to regional grades;
the first, second and third level areas are in accordance with 20:15:5, labeling and connecting the proportional chromaticities, and labeling the transformer substation based on 130% of the labeling chromaticities of the first level region, the second level region and the third level region;
the acquisition of the original data comprises region data information, load data information and power system information;
the basic information of the power grid equipment comprises the price, the rated power and the service life of the power grid equipment;
the first level area is a city level area, the second level area is a county level area, and the third level area is a village level area.
7. The transmission and distribution system planning assistance system according to any of claims 4-6, wherein the load prediction module (400) comprises: the load prediction module (400) predicts a total load and a space load of the power grid;
the load prediction module (400) is electrically connected with the data acquisition module (200), when the load prediction module (400) predicts the total load, the load data information, the load current situation information and the related data of the historical power grid distribution diagram in the planning period in the load data information obtained by the data acquisition module (200) are calculated by a simple exponential smoothing method, and a year weight is set;
when the load prediction module (400) predicts the space load, the power supply range is calculated according to a historical power grid distribution diagram, regional data information and electric power system information, the calculation results of the simple exponential smoothing method are summarized, and the prediction result is adjusted by a bottom-up method.
8. The transmission and distribution system planning assistance system of claim 7 wherein the load forecasting module (400) further comprises: the load prediction module (400) predicts a future annual load amount;
setting regional load density according to regional related data, dividing the regional load density into a first regional load density, a second regional load density and a third regional load density, and dividing the regional related data into three data sets from small to large, wherein the three data sets are respectively a first data set, a second data set and a third data set;
when the region-related data is in the first data set, the load of the region is the product of the first region load density and the region area;
when the region-related data is in the second data set, the load of the region is the product of the second region load density and the region area;
when the region-related data is in the third data set, the load of the region is the product of the load density of the third region and the area of the region;
the load capacity of the future year is the product of loads of different regions and corresponding concurrency rates.
9. The transmission and distribution system planning assistance system according to claim 7 or 8, characterized in that the grid planning module (500) comprises: the existing power grid planning scheme is modified,
the power grid planning module (500) is electrically connected with the database (700), the power grid planning module (500) acquires data generated by each module from the database (700), and the installed capacity of a power plant is set as a power supply available amount in a historical power grid distribution diagram;
when the power grid equipment in the power grid planning module (500) needs to be optimized and checked, a user edits the set labels 'optimized site selection' and 'equipment to be checked' through the database (700).
And after the user determines a new power grid planning scheme, the power grid planning module (500) recalculates the price of the equipment required by the new site selection of the transformer substation to obtain an optimal budget result.
10. The transmission and distribution system planning assistance system of claim 9, wherein the evaluation module (600) comprises: evaluating a new optimal budget grid planning scheme planned by the grid planning module (500); the evaluation module (600) is electrically connected with the power grid planning module (500), the evaluation module (600) is electrically connected with the database (700), the evaluation module (600) acquires a new power grid planning scheme from the power grid planning module (500), acquires original data, load total amount prediction, space load prediction and future year load prediction data from the database (700), and adopts a load flow calculation method to judge whether the voltage, branch current and power of a power grid bus are out of limit, and if the voltage, branch current and power are out of limit, measures are taken to adjust the operation mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116739274A (en) * | 2023-06-19 | 2023-09-12 | 湖南电桥科技有限责任公司 | Power transmission line self-adaptive resource allocation method, system and medium based on Internet of things |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116739274A (en) * | 2023-06-19 | 2023-09-12 | 湖南电桥科技有限责任公司 | Power transmission line self-adaptive resource allocation method, system and medium based on Internet of things |
| CN116739274B (en) * | 2023-06-19 | 2023-11-28 | 湖南电桥科技有限责任公司 | Power transmission line self-adaptive resource allocation method, system and medium based on Internet of things |
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