A delivery system planning assistance system

Abstract

The application discloses a kind of delivery and distribution system planning auxiliary system, comprising: management and control center and database, data acquisition module, existing power grid analysis module, load prediction module, power grid planning module and evaluation module are connected with communication in management and control center, database is used to store the data generated by each module, wherein data acquisition module obtains historical power grid distribution map, original data and the basic information of power grid equipment by document scanner, existing power grid analysis module and load prediction module are based on the data collected by data acquisition module to analyze existing power grid and predict future annual load, power grid planning module is based on the analysis result of existing power grid and future annual load to optimize existing power grid planning scheme, and the reliability of new power grid planning scheme is calculated by power flow calculation method in evaluation module.The grid system of the application can be stable calculation and fault analysis, and does not involve the dynamic characteristics and transition process of system elements, improves the reliability of power grid planning.

Description

Technical Field

[0001] This invention relates to the technical field of power grid planning, and more particularly to an auxiliary system for planning transmission and distribution systems. Background Technology

[0002] In recent years, with the continuous development of the economy and the continuous improvement of people's living standards, the demand for electricity has been increasing, and the requirements for power quality have also been getting higher and higher.

[0003] Currently, the N-1 criterion is used to evaluate the reliability and safety of power grid planning and design. However, this analytical method has certain limitations, such as its inability to effectively reflect specific power grid fault information. Therefore, a better power grid planning reliability assessment scheme is needed to effectively address various problems that arise during power grid supply. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the aforementioned existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a transmission and distribution system planning auxiliary system to solve the problem that existing power grid planning cannot effectively reflect specific fault information of electricity.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] This invention provides a transmission and distribution system planning auxiliary system, including: a control center, a data acquisition module, an existing power grid analysis module, a load forecasting module, a power grid planning module, an evaluation module, and a database;

[0009] The control center is connected to the data acquisition module, existing power grid analysis module, load forecasting module, power grid planning module, and evaluation module, and monitors and controls the distribution network information generated by each module in real time.

[0010] The data acquisition module is used to acquire information about power grid planning schemes in real time;

[0011] An existing power grid analysis module is used to analyze the existing power grid based on the power grid planning scheme obtained by the data acquisition module;

[0012] The load forecasting module is used to forecast the total load and spatial load, and to forecast the load for future years based on the forecast results.

[0013] The power grid planning module is used to modify the existing power grid planning scheme based on the load forecast results to obtain a new power grid planning scheme.

[0014] The evaluation module is used to assess the reliability of the obtained new power grid planning scheme;

[0015] A database is used to store the data generated by each module.

[0016] As a preferred embodiment of the transmission and distribution system planning auxiliary system described in this invention, the existing power grid analysis module includes: obtaining a power grid planning scheme through the database; the existing power grid analysis module performs an analysis of the existing power grid based on the obtained power grid planning scheme, the analysis being based on the power supply overview, power grid structure and lines, and equipment safety of the existing power grid.

[0017] As a preferred embodiment of the transmission and distribution system planning auxiliary system described in this invention, the existing power grid analysis module further includes: the existing power grid analysis module analyzes the safety of existing power grid structure lines and equipment, and uploads all generated analysis data to the database;

[0018] The existing power grid analysis module is electrically connected to the data acquisition module. When the existing power grid analysis module analyzes the existing power grid structure and lines, the existing power grid analysis module obtains historical power grid distribution maps and raw data through the data acquisition module. Based on the historical power grid distribution maps and raw data, the power supply coverage area of ​​each substation is determined, and then the average coverage area of ​​the substation is calculated through the existing power grid analysis module.

[0019] The control center is electrically connected to the existing power grid analysis module. After the existing power grid analysis module calculates the average coverage area of ​​the substation, the control center monitors the obtained average coverage area of ​​the substation. If the average coverage area of ​​the substation is lower than the average radiation area, the substation is labeled "can be optimized for location".

[0020] Before the substation is tagged, the data acquisition module acquires the natural geographical location data of the regional data in the original data, and marks the acquired data on the historical power grid distribution map. The control center marks the areas that do not meet the substation site selection criteria with the first color, indicating that the area does not meet the substation construction standards. The control center marks the areas that meet the substation site selection criteria with the second color, indicating that the area meets the substation construction standards. The first color and the second color are two different hues.

[0021] The existing power grid analysis module analyzes equipment safety, obtains power system information and basic information of power grid equipment through the data acquisition module, obtains the operating year of the substation based on the power system information stored in the database, and monitors it through the control center;

[0022] When the power grid equipment in a substation reaches its service life, it is marked as "equipment requiring inspection". The service life is determined by the degree of damage to the power grid equipment.

[0023] As a preferred embodiment of the transmission and distribution system planning auxiliary system described in this invention, the existing power grid analysis module further includes:

[0024] The population density of the region is calculated based on the regional data information in the original data.

[0025] The control center sets a population density threshold and monitors and divides the electricity consumption areas.

[0026] When the population density is higher than or equal to the population density threshold, the area is marked as a high-electricity-consumption area;

[0027] When the population density is below a threshold, the area is marked as a low-electricity area;

[0028] The high-electricity-consumption areas and low-electricity-consumption areas are marked with different symbols and are shown on the historical power grid distribution map;

[0029] Based on the power supply and power output of the substations to each region marked on the historical circuit distribution map, calculate the average power output of the region.

[0030] If the power supply in a certain area is lower than the average power supply, that area will be marked as an area that can be optimized.

[0031] As a preferred embodiment of the power transmission and distribution system planning auxiliary system described in this invention, the data acquisition module includes: acquiring historical power grid distribution maps, original data, and power grid equipment information; scanning and reading power grid planning scheme information through a document scanning device; and transmitting the acquired information data to a database for storage.

[0032] Based on the historical power grid distribution data in the data acquisition module, different power grid voltages in various regions are divided into regular or irregular areas of corresponding sizes. Based on the regional data obtained by the data acquisition module, the geographical location, quantity, and time of occurrence of regional population and load distribution are predicted.

[0033] As a preferred embodiment of the power transmission and distribution system planning auxiliary system described in this invention, the data acquisition module further 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 levels;

[0034] The first-level area, the second-level area, and the third-level area are marked and connected according to the color ratio of 20:15:5. The substation is marked based on 130% of the color of the first-level area, the second-level area, and the third-level area.

[0035] The acquisition of the raw data includes regional data information, load data information, and power system information;

[0036] The basic information of the power grid equipment includes its price, rated power, and service life.

[0037] 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.

[0038] As a preferred embodiment of the transmission and distribution system planning auxiliary system described in this invention, the load forecasting module includes: the load forecasting module forecasts the total load and spatial load of the power grid;

[0039] The load forecasting module is electrically connected to the data acquisition module. When the load forecasting module forecasts the total load, it performs simple exponential smoothing calculations using the load data information during the planning period, the current load information, and the relevant data of the historical power grid distribution map obtained by the data acquisition module, and sets the year weight.

[0040] When the load forecasting module forecasts spatial load, it calculates the power supply range based on historical power grid distribution maps, regional data information, and power system information. It also summarizes the calculation results of the simple exponential smoothing method and adjusts the forecast results using a bottom-up method.

[0041] As a preferred embodiment of the transmission and distribution system planning auxiliary system described in this invention, the load forecasting module further includes: the load forecasting module forecasts the load amount for future years;

[0042] Based on the relevant regional data, the regional load density is set and divided into the first regional load density, the second regional load density and the third regional load density. The relevant regional data is divided into three datasets from small to large, namely the first dataset, the second dataset and the third dataset.

[0043] When the relevant data for a region is located in the first dataset, the load of that region is the product of the load density of the first region and the area of ​​that region;

[0044] When the relevant data for a region is located in the second dataset, the load of that region is the product of the load density of the second region and the area of ​​that region;

[0045] When the relevant data for a region is located in the third dataset, the load of that region is the product of the load density of the third region and the area of ​​that region;

[0046] The future annual load is the product of the load in different regions and the corresponding simultaneity rate.

[0047] As a preferred embodiment of the power transmission and distribution system planning auxiliary system described in this invention, the power grid planning module includes: modifying existing power grid planning schemes.

[0048] The power grid planning module is electrically connected to the database. The power grid planning module obtains the data generated by each module from the database. For the historical power grid distribution map, the installed capacity of the power plants is set as the available power.

[0049] When the power grid equipment in the power grid planning module needs to be optimized and inspected, the user can edit the pre-set tags "Optimizable Site Selection" and "Equipment to be Inspected" through the database.

[0050] Once the user determines the new power grid planning scheme, the power grid planning module recalculates the price of the equipment required for the new substation site selection to obtain the optimal budget result.

[0051] As a preferred embodiment of the power transmission and distribution system planning auxiliary system described in this invention, the evaluation module includes: evaluating the new optimal budget power grid planning scheme planned by the power grid planning module; the evaluation module is electrically connected to the power grid planning module and electrically connected to the database; the evaluation module obtains the new power grid planning scheme from the power grid planning module, and obtains original data, total load forecast, spatial load forecast, and future annual load forecast data from the database, and uses power flow calculation method to determine whether the power grid bus voltage, branch current, and power exceed the limits; if they exceed the limits, measures are taken to adjust the operation mode.

[0052] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses total load forecasting and spatial load forecasting as the basis for calculation to calculate the load of future years. Under the premise of considering the local natural environment, it also ensures the consistency between the spatial load forecasting results and the total load forecasting results. The present invention evaluates the new power grid planning scheme through the power flow calculation method. The power grid system can be stably calculated and fault analyzed without involving the dynamic characteristics and transient processes of system components, thereby improving the reliability of power grid planning. Attached Figure Description

[0053] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0054] Figure 1 This is a schematic diagram of the system structure of a distribution system planning auxiliary system according to an embodiment of the present invention. Detailed Implementation

[0055] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0056] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0057] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0058] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0059] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] Example 1

[0062] Reference Figure 1 This is one embodiment of the present invention, which provides a transmission and distribution system planning auxiliary system, including: a control center 100, a data acquisition module 200, an existing power grid analysis module 300, a load forecasting module 400, a power grid planning module 500, an evaluation module 600, and a database 700;

[0063] The system includes a control center (100), a communication connection data acquisition module (200), an existing power grid analysis module (300), a load forecasting module (400), a power grid planning module (500), and an evaluation module (600), and monitors and controls the distribution network information generated by each module in real time.

[0064] Data acquisition module 200 is used to acquire information on power grid planning schemes in real time;

[0065] The existing power grid analysis module 300 is used to analyze the existing power grid based on the power grid planning scheme obtained by the data acquisition module 200;

[0066] The load forecasting module 400 is used to forecast the total load and spatial load, and to forecast the load for future years based on the forecast results.

[0067] The power grid planning module 500 is used to modify the existing power grid planning scheme based on the load forecast results to obtain a new power grid planning scheme.

[0068] Evaluation module 600 is used to evaluate the reliability of the obtained new power grid planning scheme;

[0069] Database 700 is used to store the data generated by each module.

[0070] Furthermore, the existing power grid analysis module 300 includes: obtaining power grid planning schemes through database 700; and performing existing power grid analysis on the obtained power grid planning schemes. The analysis is based on the power supply overview, power grid structure and lines, and equipment safety of the existing power grid.

[0071] Furthermore, the existing power grid analysis module 300 also includes: the existing power grid analysis module 300 analyzes the safety of existing power grid structure lines and equipment, and uploads all the generated analysis data to the database 700;

[0072] The existing power grid analysis module 300 is electrically connected to the data acquisition module 200. When the existing power grid analysis module 300 analyzes the existing power grid structure and lines, the existing power grid analysis module 300 obtains historical power grid distribution maps and raw data through the data acquisition module 200. Based on the historical power grid distribution maps and raw data, the power supply coverage area of ​​each substation is determined, and then the average coverage area of ​​the substation is calculated through the existing power grid analysis module 300.

[0073] The control center 100 is electrically connected to the existing power grid analysis module 300. After the existing power grid analysis module 300 calculates the average coverage area of ​​the substation, the control center 100 monitors the obtained average coverage area of ​​the substation. If the average coverage area of ​​the substation is lower than the average radiation area, the substation is labeled "can be optimized for location".

[0074] Before the substation is tagged, the data acquisition module 200 acquires the natural geographical location data of the regional data in the original data and marks the acquired data on the historical power grid distribution map. The control center 100 marks the areas that do not meet the substation site selection criteria with the first color, indicating that the area does not meet the substation construction standards. The control center 100 marks the areas that meet the substation site selection criteria with the second color, indicating that the area meets the substation construction standards. The first color and the second color are two different hues.

[0075] 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, obtains the operating year of the substation based on the power system information stored in the database 700, and monitors it through the control center 100.

[0076] When the power grid equipment in a substation reaches its service life, it will be marked as "equipment requiring inspection". The service life is determined by the degree of damage to the power grid equipment.

[0077] Furthermore, the existing power grid analysis module 300 also includes:

[0078] The population density of the region was calculated based on the regional data information in the original data.

[0079] Set a population density threshold, control center 100, and monitor and classify the electricity consumption of the electricity consumption area;

[0080] When the population density is higher than or equal to the population density threshold, the area is marked as a high-electricity-consumption area;

[0081] When the population density is below a threshold, the area is marked as a low-electricity area;

[0082] High-electricity-consumption areas and low-electricity-consumption areas are marked with different symbols and are shown on the historical power grid distribution map;

[0083] Based on the power supply and power output of the substations to each region marked on the historical circuit distribution map, calculate the average power output of the region.

[0084] If the power supply in a certain area is lower than the average power supply, that area will be marked as an area that can be optimized.

[0085] Furthermore, the data acquisition module 200 includes: acquiring historical power grid distribution maps, raw data, and power grid equipment information; scanning and reading power grid planning scheme information through a document scanning device; and transmitting the acquired information data to the database 700 for storage.

[0086] Based on the historical power grid distribution data in the data acquisition module 200, different power grid voltages in various regions are divided into regular or irregular areas of corresponding sizes. Based on the regional data acquired by the data acquisition module 200, the geographical location, quantity, and time of occurrence of regional population and load distribution are predicted.

[0087] Furthermore, the data acquisition module 200 also includes: historical power grid distribution maps divided into first-level regional power grid distribution maps, second-level regional power grid distribution maps, and third-level regional power grid distribution maps according to regional levels;

[0088] The first-level area, the second-level area, and the third-level area are marked and connected according to the color ratio of 20:15:5. The substation is marked based on 130% of the color of the first-level area, the second-level area, and the third-level area.

[0089] The acquisition of raw data includes regional data, load data, and power system information;

[0090] Specifically, regional data includes information related to the region's natural geographical location, such as area, latitude and longitude, vegetation type and coverage area; administrative region information, such as population size and residential locations; load data includes current load information and load data during the planning period; current load information includes power supply information and load change curve information; load data during the planning period includes historical annual load trend charts.

[0091] Basic information about power grid equipment includes its price, rated power, and service life.

[0092] It should be noted that power grid equipment includes power transformers, switches, disconnectors, busbars, GIS, HGIS, and voltage transformers.

[0093] The first level of the region is the city-level region, the second level of the region is the county-level region, and the third level of the region is the village-level region.

[0094] Furthermore, the load forecasting module 400 includes: the load forecasting module 400 forecasts the total load and spatial load of the power grid;

[0095] The load forecasting module 400 is electrically connected to the data acquisition module 200. When the load forecasting module 400 forecasts the total load, it uses the load data information during the planning period, the load status information, and the relevant data of the historical power grid distribution map obtained by the data acquisition module 200 to perform simple exponential smoothing and set the year weight.

[0096] It should be noted that for the data in the historical annual load trend chart, the weight of data from more recent years is set to be smaller, and the weight of data from more recent years is set to be larger. The total load forecast is calculated by weighted average, where the weight decreases exponentially from early to late years. The specific relationship is expressed as follows:

[0097]

[0098] Where α is the smoothing parameter and α∈(0,1), The total load forecast value is given, and the year at time point T+1 is the time series y1, y2, ..., y T The weighted average value is obtained, and the rate at which the weights decrease is controlled by the smoothing parameter α.

[0099] Spatial load forecasting calculates the power supply range based on historical power grid distribution maps, regional data, and power system information;

[0100] Based on the different grid voltages in various regions according to the historical power grid distribution map, the regions are divided into regular or irregular areas of corresponding sizes, and the geographical location, quantity, and timing of population and load distribution in the regions are predicted based on relevant regional data.

[0101] Furthermore, when the load forecasting module 400 forecasts spatial load, it calculates the power supply range based on historical power grid distribution maps, regional data information, and power system information, summarizes the calculation results of the simple exponential smoothing method, and adjusts the forecast results using a bottom-up method.

[0102] Furthermore, the load forecasting module 400 also includes: the load forecasting module 400 forecasts the load amount for the future year;

[0103] Based on the relevant regional data, the regional load density is set and divided into the first regional load density, the second regional load density and the third regional load density. The relevant regional data is divided into three datasets from small to large, namely the first dataset, the second dataset and the third dataset.

[0104] When the relevant data for a region is located in the first dataset, the load of that region is the product of the load density of the first region and the area of ​​that region;

[0105] When the relevant data for a region is located in the second dataset, the load of that region is the product of the load density of the second region and the area of ​​that region;

[0106] When the relevant data for a region is located in the third dataset, the load of that region is the product of the load density of the third region and the area of ​​that region;

[0107] The future annual load is the product of the load in different regions and the corresponding simultaneity rate.

[0108] Furthermore, the power grid planning module 500 includes: modifying existing power grid planning schemes.

[0109] The power grid planning module 500 is electrically connected to the database 700. The power grid planning module 500 obtains the data generated by each module from the database 700. For the historical power grid distribution map, the installed capacity of the power plants is set as the available power.

[0110] When the power grid equipment in the power grid planning module 500 needs to be optimized and inspected, the user can edit the pre-set tags "Optimizable Site Selection" and "Equipment to be Inspected" through the database 700.

[0111] Once the user determines the new power grid planning scheme, the power grid planning module 500 recalculates the price of the equipment required for the new substation site selection and obtains the optimal budget result.

[0112] It should be noted that in the historical power grid distribution map, the installed capacity of power plants is set as the available power. Users can edit the labels "Optimizable Site Selection" and "Equipment to be Inspected". The "Optimizable Site Selection" option allows site selection in areas without red markings. Based on the new substation site selection, the power consumption area is reconnected. The power grid planning module 500 calls the existing power grid analysis module 300 to calculate the coverage area of ​​the new substation site selection. Based on the total load forecast, spatial load forecast, and future annual load forecast, the power load of the area is calculated. The calculation results are displayed in real time in the power grid planning module, allowing users to intuitively understand the effect of the new substation site selection.

[0113] It should also be noted that for "equipment that needs to be inspected", the power grid planning module 500 compares the equipment with the "equipment that needs to be inspected" label based on the basic information of the power grid equipment. If there is a lower-priced version of the same equipment or an upgraded version, the equipment with the "equipment that needs to be inspected" label can be replaced.

[0114] Furthermore, the evaluation module 600 includes: evaluating the new optimal budget power grid planning scheme planned by the power grid planning module 500; the evaluation module 600 is electrically connected to the power grid planning module 500 and the database 700; the evaluation module 600 obtains the new power grid planning scheme from the power grid planning module 500, and obtains the original data, total load forecast, spatial load forecast, and future annual load forecast data from the database 700, and uses the power flow calculation method to determine whether the power grid bus voltage, branch current, and power exceed the limits. If there are any exceedances, measures are taken to adjust the operation mode.

[0115] It should be noted that the evaluation module 600 uses power flow calculation to evaluate the new power grid planning scheme. In the actual power grid system, it is based on the rated power and load of power plants in the original data, and the rated power generally does not change with the node voltage. The relationship between the injected power and injected load at each node is expressed as follows:

[0116] S i =P i +jQ i =U i I i

[0117] Among them, P i and Q i Let P be the active power and reactive power injected into the power grid by node i, respectively. When i is a power plant node, P... i >0; when i is a load node, P i <0; when i is a load node P i When Q = 0, i =0;U i and Ii These are the conjugates of the node voltage phasor and the node injected current phasor, respectively.

[0118] Example 2

[0119] Referring to Table 1, an embodiment of the present invention provides a planning auxiliary system for a distribution system. Scientific experiments verify the beneficial effects of the present invention.

[0120] The experimental data are shown in Table 1:

[0121] Table 1 Regional Load Forecast Data

[0122]

[0123] Using the regional data in Table 1, the load of each region (A / B / C) is obtained by multiplying the regional load density by the regional area. The load of all divided regions is multiplied by the simultaneity rate to obtain the future annual load. The power flow calculation method is used to evaluate the power grid planning scheme, which can improve the reliability of power grid planning without involving the dynamic characteristics and transitions of system components.

[0124] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

[0125] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0126] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can 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, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0127] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0128] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0129] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0130] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A planning auxiliary system for a power transmission and distribution system, characterized in that, include: Control center (100), data acquisition module (200), existing power grid analysis module (300), load forecasting module (400), power grid planning module (500), evaluation module (600) and database (700); The control center (100) is connected to a data acquisition module (200), an existing power grid analysis module (300), a load forecasting module (400), a power grid planning module (500), and an evaluation module (600), and monitors and controls the distribution network information generated by each module in real time. The data acquisition module (200) is used to acquire information on power grid planning schemes in real time; The existing power grid analysis module (300) is used to analyze the existing power grid based on the power grid planning scheme obtained by the data acquisition module (200); specifically, the existing power grid analysis module (300) analyzes the safety of the existing power grid structure lines and equipment, and uploads all the generated analysis data to the database (700); The existing power grid analysis module (300) is electrically connected to the data acquisition module (200). When the existing power grid analysis module (300) analyzes the existing power grid structure and lines, the existing power grid analysis module (300) obtains historical power grid distribution maps and raw data through the data acquisition module (200). Based on the historical power grid distribution maps and raw data, the power supply coverage area of ​​each substation is determined, and then the average coverage area of ​​the substation is calculated through the existing power grid analysis module (300). The control center (100) is electrically connected to the existing power grid analysis module (300). After the existing power grid analysis module (300) calculates the average coverage area of ​​the substation, the control center (100) monitors the obtained average coverage area of ​​the substation. If the average coverage area of ​​the substation is lower than the average radiation area, the substation is set to be tagged as an optimizable location. Before the substation is tagged, the data acquisition module (200) acquires the natural geographical location data of the regional data in the original data and marks the acquired data on the historical power grid distribution map. The control center (100) marks the area that does not meet the substation site selection as the first color, indicating that the area does not meet the substation construction standards. The control center (100) marks the area that meets the substation site selection as the second color, indicating that the area meets the substation construction standards. The first color and the second color are two different hues. The existing power grid analysis module (300) analyzes equipment safety, obtains power system information and basic information of power grid equipment through the data acquisition module (200), obtains the operating year of the substation based on the power system information stored in the database (700), and monitors it through the control center (100); When the power grid equipment in the substation reaches its service life, the power grid equipment is marked as equipment that needs to be inspected. The service life is determined by the degree of damage to the power grid equipment. The load forecasting module (400) is used to forecast the total load and spatial load, and to forecast the load for future years based on the forecast results; specifically, the load forecasting module (400) forecasts the total load and spatial load of the power grid. The load forecasting module (400) is electrically connected to the data acquisition module (200). When the load forecasting module (400) forecasts the total load, it performs simple exponential smoothing calculations using the load data information during the planning period, the load status information, and the relevant data of the historical power grid distribution map obtained by the data acquisition module (200), and sets the year weight. When the load forecasting module (400) forecasts spatial load, it calculates the power supply range based on historical power grid distribution map, regional data information and power system information, summarizes the calculation results of the simple exponential smoothing method, and adjusts the forecast results using a bottom-up method. The power grid planning module (500) is used to modify the existing power grid planning scheme based on the load forecast results to obtain a new power grid planning scheme; specifically, the power grid planning module (500) modifies the existing power grid planning scheme. The power grid planning module (500) is electrically connected to the database (700). The power grid planning module (500) obtains the data generated by each module from the database (700). For the historical power grid distribution map, the installed capacity of the power plant is set as the available power. When the power grid equipment in the power grid planning module (500) needs to be optimized and inspected, the user can edit the pre-set tags in the database (700): equipment that can be optimized for location and equipment that needs to be inspected; Once the user determines the new power grid planning scheme, the power grid planning module (500) recalculates the price of the equipment required for the new substation site selection and obtains the optimal budget result. The evaluation module (600) is used to evaluate the reliability of the obtained new power grid planning scheme; The database (700) is used to store the data generated by the modules.

2. The transmission and distribution system planning auxiliary system as described in claim 1, characterized in that, The existing power grid analysis module (300) includes: obtaining a power grid planning scheme through the database (700), and the existing power grid analysis module (300) performing an analysis of the existing power grid based on the obtained power grid planning scheme. The analysis is based on the power supply overview, power grid structure and lines, and equipment safety of the existing power grid.

3. The transmission and distribution system planning auxiliary system as described in claim 2, characterized in that, The existing power grid analysis module (300) also includes: The population density of the region is calculated based on the regional data information in the original data. The control center (100) sets a population density threshold and monitors and divides the electricity consumption in the electricity consumption area; When the population density is higher than or equal to the population density threshold, the area is marked as a high-electricity-consumption area; When the population density is below a threshold, the area is marked as a low-electricity area; The high-electricity-consumption areas and low-electricity-consumption areas are marked with different symbols and are shown on the historical power grid distribution map; Based on the power supply and power output of the substations to each region marked on the historical circuit distribution map, calculate the average power output of the region. If the power supply in a certain area is lower than the average power supply, that area will be marked as an area that can be optimized.

4. The transmission and distribution system planning auxiliary system as described in claim 3, characterized in that, The data acquisition module (200) includes: acquiring historical power grid distribution maps, original data and power grid equipment information, scanning and reading power grid planning scheme information through a document scanning device, and transmitting the acquired information data to a database (700) for storage; Based on the historical power grid distribution data in the data acquisition module (200), different power grid voltages in various regions are divided into regular or irregular areas of corresponding size, and the geographical location, quantity and occurrence time of regional population and load distribution are predicted based on the regional data obtained by the data acquisition module (200).

5. The transmission and distribution system planning auxiliary system as described in claim 4, characterized in that, The data acquisition module (200) further 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 the regional level; The first-level area, the second-level area, and the third-level area are marked and connected according to the color ratio of 20:15:

5. The substation is marked based on 130% of the color of the first-level area, the second-level area, and the third-level area. The acquisition of the raw data includes regional data information, load data information, and power system information; The basic information of the power grid equipment includes its price, rated power, and service life. 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.

6. The transmission and distribution system planning auxiliary system as described in claim 5, characterized in that, The load forecasting module (400) further includes: the load forecasting module (400) forecasts the load amount for future years; Based on the relevant regional data, the regional load density is set and divided into the first regional load density, the second regional load density and the third regional load density. The relevant regional data is divided into three datasets from small to large, namely the first dataset, the second dataset and the third dataset. When the relevant data for a region is located in the first dataset, the load of that region is the product of the load density of the first region and the area of ​​that region; When the relevant data for a region is located in the second dataset, the load of that region is the product of the load density of the second region and the area of ​​that region; When the relevant data for a region is located in the third dataset, the load of that region is the product of the load density of the third region and the area of ​​that region; The future annual load is the product of the load in different regions and the corresponding simultaneity rate.

7. The transmission and distribution system planning auxiliary system as described in claim 6, characterized in that, The evaluation module (600) includes: evaluating the new optimal budget power grid planning scheme planned by the power grid planning module (500); the evaluation module (600) is electrically connected to the power grid planning module (500) and the database (700); the evaluation module (600) obtains the new power grid planning scheme from the power grid planning module (500), and obtains the original data, total load forecast, spatial load forecast and future annual load forecast data from the database (700), and uses the power flow calculation method to determine whether the power grid bus voltage, branch current and power exceed the limit. If the limit is exceeded, measures are taken to adjust the operation mode.

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