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1.INTRODUCTIONBased on the increasingly high requirements for power supply systems[1]. The construction of the emergency rescue command center system is constantly improving. The new generation of emergency command system based on the correlation display of geographic information system (GIS)[2] has played a great role in handling emergency incidents such as the post-disaster repair of tornado in Yancheng, Jiangsu, high temperature power supply in Chengdu, Sichuan, heavy rain rescue in Zhuozhou, and power supply for Typhoon Dusurui, but it has also exposed several shortcomings. Incomplete display of information obtained from outside the system, It is impossible to accurately locate disasters and damage points such as earthquakes, wildfires, floods, collapsed towers, and broken wires on the map. It is not possible to support the convenient entry of information on these points. It is impossible to display the effective information of each business module in the system based on the geographical location information, such as the basic power grid, weather conditions, video equipment, team resources, equipment resources, material warehouses, vehicle resources and other information and distribution around the point. When the headquarters leaders were conducting operational commands, they were unable to highlight key information, were unable to efficiently command and coordinate operations, and lacked the means to assist in reviewing the command process. The above shortcomings make it impossible to realize situation analysis and strategic planning of early warning emergency events, and also fail to meet the objective needs of command coordination and intelligence sharing, and ultimately fail to effectively support early warning emergency response decisions. Therefore, it is necessary to provide a set of visual command links and information exchange systems to improve the efficiency of power supply combat command in emergency situations. 2.OVERALL DESIGNAfter an emergency warning incident occurs, intelligence data is stored in the database and emergency operations are initiated. The system uses point analysis to view the distribution of various equipment resources within a radius of N kilometers from the incident point[3]. Map drawing can be performed based on the information obtained, and relevant event annotation, resource scheduling[4], etc. can be completed. The process is shown in Figure 1: 2.1Ability to mark and analyze points on the mapYou can mark the location of the disaster or the location of the damage or failure on the map. You can classify and collect the points marked on the map, and name and annotate the collected points. Supports display and modification of favorite locations on the map. Actual meteorological conditions can be analyzed for the points marked on the map, and the distribution of basic power grids, important users, disaster-damaged points, power transmission video equipment, in-station video equipment, team resources, vehicle resources, equipment resources, and material warehouses within a specified range around the marked points can be analyzed. It can summarize and display various analysis results, realize rapid preview of emergency command elements, and provide data support for emergency command. 2.2Map drawing abilityYou can create plots based on GIS maps, and use icons, lines, arrows, text and other plotting tools to perform combat command plots on maps. You can save the created drawings, edit and update the saved drawings, and create different versions by performing secondary operations based on the saved historical drawings. The saved historical plots can be displayed in the system, and the map scale and viewing angle can be adjusted. The created plots can also be saved to the server or exported to the local computer in the form of pictures, so as to realize the printing and dissemination of the plots. 3.MAP MARKING AND POINT ANALYSISThe on-map annotation and point analysis are based on GIS maps. After opening, select a point on the map, perform data analysis based on the selected point coordinates and the circled range selected by the user, display the results in a list and support viewing on the map[5]. 3.1Point analysis contentAccording to the latitude and longitude of the marked point and the circled area, the statistical information of each analysis item around the point can be obtained. And it can be visualized on the map, so that you can quickly understand the specific situation around it. Live weather conditions: analyze the live weather information around the marked longitude and latitude. Basic power grid: obtain information on substations and transmission lines of 500kV and above around the point. Important users: Get the important users information of the power grid around the point. It can be displayed as a map heat map. Teams, Vehicles, Material Warehouses, Equipment: Get information about emergency teams, emergency vehicles, material warehouses, and emergency equipment around the location. You can aggregate scattered location information on the map. Surrounding Video: Get the video of the power transmission lines around the point and the video information inside the station, locate the video on the map, and display the number of video devices in the form of corner marks. Power grid failure: Get the information of unrestored power grid failures around the point, and count the substation failures, transmission line failures, and distribution line failures separately. Distribution transformer power outage and power on: Obtain the distribution transformer power outage and power on fault information around the point. 95598 power outage work order: Get the current 95598 power outage work order information around the point. 3.2Point analysis data acquisitionThe point analysis data comes from 5 different platforms and is summarized and displayed in this system, making it easy to understand the specific situation of the current location at a glance, view the important data information of concern, and better formulate command plans. The four elements of resource data are obtained from the material platform, including teams, vehicles, material warehouses, and equipment. Real-time weather information data is obtained from Nari Hydropower, and the weather information of the current point is displayed in real time. Data from important users and 95598 power outage work orders from the data center. Video and business center equipment data are retrieved from the unified video platform. The power grid resource business center obtains the power grid equipment ledger and fault data. The process is shown in Figure 2: 3.3Point analysis algorithmPoint analysis using geospatial gridding algorithms[6]. By dividing the geographic space into a series of regular grid cells, each of which contains a certain geographic area and data, geographic data can be stored, queried, analyzed, and visualized more efficiently. First, different grid division standards are set according to different application scenarios and data requirements to analyze the required data more accurately. Then, the original geospatial data is cleaned, converted and formatted to obtain a data format that meets the grid division requirements. After data preprocessing, grid division is performed, and the geographic space is divided into a series of grid cells according to the grid division standards set for the current type of data. Then, a unique code is assigned to each grid cell, and an index is established to support fast retrieval and positioning. Finally, the gridded data is used for spatial analysis, statistical analysis and visualization. 4.MAP DRAWINGCreate plots based on GIS maps, and use lines, arrows, text, icons, charts and other plotting tools to plot operations on the map. Highlight some areas, mark disasters, and dispatch resources and arrange routes. The process is shown in Figure 3: 4.1Basic AbilitiesMap drawing supports basic creation and saving. It supports mapping. After the mapping editing, there are already a large number of manually added marks, text annotations and other mappings that help analysis on the map. At this time, you can perform the mapping operation and convert the current map display into a picture for saving and downloading, which is convenient for subsequent offline use. Supports viewing historically saved plots, and can only view the images generated by plotting during the editing process of the corresponding plot. Historical plots can be copied as new plots for version control. Supports associating specific emergency events, which facilitates viewing plots for specific events. 4.2Plotting CanvasSupports delimiting an area and exporting the area into a high-definition image according to the current scale of the map. Delimit an area in the middle of the map with the aspect ratio of A4 paper, and drag to adjust the size and horizontal and vertical directions. After confirmation, obtain the coordinates of the four vertices. After that, no matter how the map is zoomed in or out, the final exported image will use the surface connected by these four vertices as the export surface, so that a large-scale map at the community level can be exported. 4.3Key areas highlightedYou can select regions at the provincial, municipal, and county levels. After selection, the region will be drawn with a border line and a default background color will be added. The color can be modified. The border line supports modifying the line width and color, and supports stroke projection to highlight the border line. There is a lower-level stroke switch that can draw the border line of the current level and the next level according to the province, city, and county for easy viewing. After selecting an area, it supports white masking, which adds a layer of white mask to other areas on the map except the selected area to highlight the selected area. It supports automatic coloring, which can fill the lower-level areas with 4 colors, and use 4 non-adjacent colors to fill the entire selected area. 4.4Basic plottingThe brush tool is used to drag on the map to draw corresponding irregular lines. The color and thickness can be adjusted. The line and double line tool allows you to select points on the map. It supports connecting solid lines, dotted lines, solid double lines, dotted double lines, dotted and solid lines, etc. between the selected points. You can adjust the color and thickness. The arrow tool connects the points clicked on the map into arrows. It supports line arrows, surface arrows, and curved arrows. It also supports thickness and color control. Graphics tool, after selecting the type, you can click and drag on the map to generate the selected graphics, supporting rectangles, circles, ellipses and custom polygons. You can modify the border color and thickness of the graphics, modify the fill color, and support gradient color filling. The text tool can generate a text box anywhere on the map for text input. The annotation tool supports generating a text box with connecting lines, which can be bound to a location. After selecting a text, you can set different styles, such as font, font size, font color, background color, bold, italic, underline, etc. The table tool supports generating a dynamic table on the map, and the table content and style can be manually controlled. The chart tool supports the generation of bar charts, line charts, pie charts and ring charts, which can be placed on the map. The position can be modified by dragging. The picture and video tool supports displaying a picture or video at a selected location. It can upload local resources and also supports selecting remote video library resources. The legend tool supports dynamic generation of legends based on the content marked on the map, making it easier for users to view. 4.5Icon PlottingUsers can drag and drop icons from the toolbar onto the map. By default, there are four types of icons: resources, disaster damage, security, and power grid facilities. Icons can be uploaded and configured on the map icon management page. Icons have different states, and different states correspond to different colors. After selecting an icon, you can switch the state directly without reinserting it. 4.6Grid plottingSupports geographic layout, regional power grid wiring diagram, and equipment power grid wiring diagram. In the geographic layout, search for substations, transmission lines, and distribution lines, and then select them to draw the geographic grid of the equipment on the map. In the regional wiring diagram, select the area and voltage level, and then display all the equipment of the voltage level in the area. This line is a straight line, showing the relationship between the equipment. The equipment wiring diagram is the wiring diagram of a single device. After selecting it, only the device is displayed. These three types of grid mapping make it convenient for users to mark key affected equipment on the map so as to conduct combat command more clearly. 5.SUMMARYIn view of the problems in the early stage of the new generation of emergency command system, such as the incomplete display of information obtained from outside the system, the inability to aggregate and display effective information of various business modules in the system based on geographic location information, the inability to highlight key information during combat command, efficient command and coordination of operations, and the lack of means to assist in the review of the command process, this system uses charts and maps to display the location, movement trajectory and working status of combat units and command nodes, establish visualization of command links and information exchange, and improve combat command efficiency. Use map tools to provide comprehensive on-site intelligence for the emergency command center, quickly analyze terrain, disaster conditions and the location of available resources, and conduct combat planning and on-site deployment. Use charts and graphical interfaces to display on-site changes, resource scheduling and emergency response effects, monitor combat progress, and make command decisions and adjustments in a timely manner. Based on geographic information systems (GIS) and related technologies, data such as resource locations and target information are visualized to optimize emergency resource scheduling and combat decisions, thereby improving the level of emergency command and combat of power supply services. 6.6.REFERENCESHuang Jianyong, Meng Qibin, Wu Shunchao, et al.,
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