CN106815243B - Web-GIS (geographic information System) -based distributed power supply intelligent analysis and decision system - Google Patents
Web-GIS (geographic information System) -based distributed power supply intelligent analysis and decision system Download PDFInfo
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Abstract
The invention discloses a Web-GIS (geographic information System) -based distributed power supply intelligent analysis and decision system, which relates to the field of power distribution network management systems, adopts a B/S (browser/server) structure, and comprises a power distribution network computing module, a Web-GIS service calling module and a visual information display module; the system combines the calculation result of the power distribution network with Web-GIS data to automatically generate a power distribution network topological structure, and has the functions of calling and combining a Web-GIS display calculation function and calling a topological graph generation function; the power distribution network computing module is used for calling and combining Web-GIS display computing after an operator logs in the system; the Web-GIS service calling module is used for calling Web-GIS data; the visual information display module is used for generating a power distribution network topological structure. The system adopts a B/S structure design and has greater flexibility; the system reduces the operation overhead of the server by calling the Web-GIS service instead of placing the Web-GIS and the system on the same server.
Description
Technical Field
The invention relates to the field of power distribution network management systems, in particular to a Web-GIS-based distributed power supply intelligent analysis and decision system.
Background
The power distribution network analysis and management system is various, and most of the software is of a C/S (client/server) structure and needs to be installed with a client. The development language of the client determines its operating environment, which leads to the operating limitations of the C/S architecture. In addition, most Geographic Information Systems (GISs) adopt surveying and mapping data, the development period is long, and software upgrading and maintenance are difficult. At present, an intelligent power distribution network analysis and decision system which can adapt to rapid development of distributed power supplies, is convenient to maintain and realizes cross-platform analysis is urgently needed by power companies.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent analysis and decision system of a power distribution network with a B/S structure and a distributed power supply, wherein the system adopts the B/S structure and is developed by utilizing Java high-level programming. And realizing independent calculation of the functional modules and cross-platform operation of the system.
In order to achieve the above purpose, the present invention provides the following technical solutions: a distributed power supply intelligent analysis and decision system based on Web-GIS adopts a B/S structure, namely a browser/server structure, and comprises a power distribution network computing module, a Web-GIS service calling module and a visual information display module; the system combines the calculation result of the power distribution network with Web-GIS data to automatically generate a power distribution network topological structure, and has the functions of calling and combining a Web-GIS display calculation function and calling a topological graph generation function;
the power distribution network computing module is used for calling and combining Web-GIS display computing after an operator logs in the system;
the Web-GIS service calling module is used for calling Web-GIS data;
the visual information display module is used for generating a power distribution network topological structure.
The power distribution network computing module comprises the following working steps: after logging in the system, an operator calls a calculation function combined with Web-GIS display,
step 1, HTTP sends a request to a server, and the server identifies a power distribution network calculation request decision symbol and jumps to the calculation function part;
step 2, inquiring a power distribution network calculation table in a database, and respectively assigning data to the newly-built node class object and the newly-built line class object; wherein the load flow is calculated as:
P{Point_ID,Voltage_A,Voltage_B,Voltage_C,Angle_A,Angle_B,Angle_C}、
B{Branch_ID,Head_Point_ID,Tail_Point_ID,Z_AA,Z_AB,Z_AC,Z_BA,Z_BB,Z_CC,Z_CA,Z_CB,Z_CC}；
and 3, dividing the load value of each node by the corresponding voltage value, assigning the load value to the branch current taking the node as the last node, and updating the branch current taking the node as the last node from the tail end of the power distribution network to the power supply node, wherein the calculation formula is as follows:
step 4, traversing all the branches, solving the calculation parameters of each branch, and assigning the calculation values and the correction values to the branches, wherein the voltage drop calculation formula is as follows:
and 5, from the power supply node, subtracting the voltage drop calculated in the step 4 corresponding to each branch by using the voltage of the first node of each branch, and assigning the voltage drop to the node voltage value of the tail node of each branch, wherein the calculation formula is as follows:
and 6, subtracting the current calculated voltage value from the last calculated voltage result value, taking the modulus value of the current calculated voltage value and comparing the modulus value with the precision, if the modulus value of any one phase of any one node is larger than the precision, based on the current updated voltage value of each node, re-performing the step 3, otherwise, continuing to calculate the formula as follows:
step 7, calling a checking function to check the calculation result, if the calculation result is unreasonable, returning errors, and if the calculation result is reasonable, continuing the next step;
and 8, reading the Web-GIS information data of each node from the database, assigning the Web-GIS information data to the coordinate parameters of the node class, sealing the node class in a session, overlapping the node layer with the layer provided by the Web-GIS service on the page, writing the load flow calculation voltage result of each corresponding node, and finally returning the page to the browser through HTTP to be presented to an operator.
The visual information display module comprises the following working steps: the operator logs into the system and invokes the topology map generation function,
step 1, sending a request to a server, identifying a request judgment symbol of a topological graph by the server, and skipping to a visual information display module of a power distribution network;
step 2, randomly generating node coordinates in the topological graph panel, and setting a correlation coefficient based on the coordinates and the related topological structure, so as to calculate the attraction and the repulsion between each node and other nodes, wherein the calculation formula is as follows:
V{Vertice_ID,X,Y}；
step 3, calculating the attraction force and the repulsion force according to the attraction force calculation model and the repulsion force model,
in the formula, k1Is the proportionality coefficient, dis (V)i,Vj) Is the distance between two nodes of the single-line diagram, d1A natural distance for identifying whether or not gravity is generated, SvIs a fixed value, d1Is a natural distance, mvIs the minimum distance, d, at which the two node icons do not overlapgRepresenting the number of lines connecting the nodes; calculating resultant force, decomposing stress, moving the nodes according to the direction of the resultant force, continuing if specified times are carried out, and otherwise, carrying out the step 2 again on the basis of the updated coordinates of each node;
and 4, matching the updated topological graph data after optimization with the node geographic coordinates, packaging the coordinates in a session, transmitting the coordinates to a page, automatically wiring according to an avoidance rule, and finally transmitting the page to a browser through HTTP to be presented to an operator.
The beneficial effect of adopting above technical scheme is: the system adopts a B/S structure, the interaction between the system and an operator is realized through a browser, and the system can realize cross-platform operation and maintenance; by adopting an SSH framework in Java advanced programming, the development efficiency is high, functional files or projects can be directly compiled according to new service targets and then imported into a server without updating a client, so that the development of new functions can be conveniently carried out, and an outward interface can be provided for the extension development of a system; and the Web-GIS service is called instead of placing the Web-GIS and the system developed by the invention on the same server, so that the running expense of the server is reduced.
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The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a B/S structure of a power distribution network intelligent analysis and decision system with distributed power sources.
Detailed Description
The following describes a preferred embodiment of the distributed power intelligent analysis and decision system based on the Web-GIS in detail with reference to the accompanying drawings.
As shown in figure 1, the invention relates to a specific implementation mode of a Web-GIS-based distributed power supply intelligent analysis and decision system, the system adopts a B/S structure, namely a browser/server structure, and is developed by using Java high-level programming, the system comprises three functional modules of power distribution network calculation, Web-GIS service calling and visual information display, the power distribution network topological structure is automatically generated by combining the calculation result of the power distribution network with Web-GIS data, the realization is realized by an SSH framework of Java high-level language, a power distribution network operator logs in the browser, selects required services, and round-trip information is completed by HTTP, so that two functions of calling a combination Web-GIS display calculation process after logging in the system and calling a topological graph generation process after logging in the system by the operator are provided.
After the operator completes the login, there may be two operations:
the method comprises the following steps of 'calculation and analysis of the power distribution network' and 'visualization information of the power distribution network'. When the operator checks the calculation information, the function of checking the distribution network calculation analysis is started, and the distribution network analysis information is continuously requested to the calculation function module; during calculation, the result is verified to be reasonable and correct, and if the result is wrong, the error is returned; and if the request is correct, requesting a geographic layer from the Web-GIS server side to realize layer superposition display. When an operator checks topology information, firstly, a random topology layout function is started, a random layout result is returned, then topology layout optimization is requested, automatic routing is realized on the returned optimization result according to an avoidance rule, and therefore a topology map is generated and transmitted to a browser to be displayed.
1. Operator selects to view power distribution network analysis data under Web-GIS
a) Clicking a power distribution network calculation analysis button, identifying and submitting calculation data identification of a form, such as load flow and reliability calculation, by a server side through an interceptor function in SSH (Struts2, Spring, Hibernet framework), and calling a corresponding function module;
b) calling basic data of the power distribution network by using Java-structured node classes to realize an initialization process of the power distribution network under a three-phase asymmetric condition;
c) performing power distribution network related calculation requested by a user, assigning a result to an element in a corresponding node class, packaging node data into a Session, and requesting verification to a verification function module;
d) after verification, if the result is unreasonable, returning errors, otherwise executing e);
e) if the check is correct, extracting geographic information data based on the node GIS data table, packaging the geographic information data and a calculation result in a session, and requesting Web-GIS service;
f) and (5) combining the Web-GIS service to feed back results.
2. Operator selects visual information for checking power distribution network topological structure
a) Clicking a visual button of the topological structure of the power distribution network, identifying a topological graph request identifier by the server through an SSH (simple sequence analysis) interceptor, and calling an automatic topological graph generation function module;
b) calling the topological information data of the power distribution network from the database, calling a random function, and generating a random coordinate;
c) calling a gravitational force-repulsive force optimization algorithm to perform layout optimization of the distribution network topological graph;
d) and packaging and returning a topological graph optimization result, and completing automatic wiring in a return page to complete a visualization task.
The detailed working steps of the power distribution network computing module are as follows: after logging in the system, an operator calls a calculation function combined with Web-GIS display,
step 1, HTTP sends a request to a server, and the server identifies a power distribution network calculation request decision symbol and jumps to the calculation function part;
step 2, inquiring a power distribution network calculation table in a database, and respectively assigning data to the newly-built node class object and the newly-built line class object; wherein the load flow is calculated as:
P{Point_ID,Voltage_A,Voltage_B,Voltage_C,Angle_A,Angle_B,Angle_C}、
B{Branch_ID,Head_Point_ID,Tail_Point_ID,Z_AA,Z_AB,Z_AC,Z_BA,Z_BB,Z_CC,Z_CA,Z_CB,Z_CC}；
and 3, dividing the load value of each node by the corresponding voltage value, assigning the load value to the branch current taking the node as the last node, and updating the branch current taking the node as the last node from the tail end of the power distribution network to the power supply node, wherein the calculation formula is as follows:
step 4, traversing all the branches, solving the calculation parameters of each branch, and assigning the calculation values and the correction values to the branches, wherein the voltage drop calculation formula is as follows:
and 5, from the power supply node, subtracting the voltage drop calculated in the step 4 corresponding to each branch by using the voltage of the first node of each branch, and assigning the voltage drop to the node voltage value of the tail node of each branch, wherein the calculation formula is as follows:
and 6, subtracting the current calculated voltage value from the last calculated voltage result value, taking the modulus value of the current calculated voltage value and comparing the modulus value with the precision, if the modulus value of any one phase of any one node is larger than the precision, based on the current updated voltage value of each node, re-performing the step 3, otherwise, continuing to calculate the formula as follows:
step 7, calling a checking function to check the calculation result, if the calculation result is unreasonable, returning errors, and if the calculation result is reasonable, continuing the next step;
and 8, reading the Web-GIS information data of each node from the database, assigning the Web-GIS information data to the coordinate parameters of the node class, sealing the node class in a session, overlapping the node layer with the layer provided by the Web-GIS service on the page, writing the load flow calculation voltage result of each corresponding node, and finally returning the page to the browser through HTTP to be presented to an operator.
The detailed steps of the visual information display module are as follows: the operator logs into the system and invokes the topology map generation function,
step 1, sending a request to a server, identifying a request judgment symbol of a topological graph by the server, and skipping to a visual information display module of a power distribution network;
step 2, randomly generating node coordinates in the topological graph panel, and setting a correlation coefficient based on the coordinates and the related topological structure, so as to calculate the attraction and the repulsion between each node and other nodes, wherein the calculation formula is as follows:
V{Vertice_ID,X,Y}；
step 3, calculating the attraction force and the repulsion force according to the attraction force calculation model and the repulsion force model,
in the formula, k1Is the proportionality coefficient, dis (V)i,Vj) Is the distance between two nodes of the single-line diagram, d1A natural distance for identifying whether or not gravity is generated, SvIs a fixed value, d1Is a natural distance, mvIs the minimum distance, d, at which the two node icons do not overlapgRepresenting the number of lines connecting the nodes; calculating resultant force, decomposing stress, moving the nodes according to the direction of the resultant force, continuing if specified times are carried out, and otherwise, carrying out the step 2 again on the basis of the updated coordinates of each node;
and 4, matching the updated topological graph data after optimization with the node geographic coordinates, packaging the coordinates in a session, transmitting the coordinates to a page, automatically wiring according to an avoidance rule, and finally transmitting the page to a browser through HTTP to be presented to an operator.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (2)
1. Web-GIS-based distributed power supply intelligent analysis and decision system is characterized in that: the Web-GIS-based distributed power supply intelligent analysis and decision system adopts a B/S structure, namely a browser/server structure, and comprises a power distribution network computing module, a Web-GIS service calling module and a visual information display module; the system combines the calculation result of the power distribution network with Web-GIS data to automatically generate a power distribution network topological structure, and has the functions of calling and combining a Web-GIS display calculation function and calling a topological graph generation function;
the power distribution network computing module is used for calling and combining Web-GIS display computing after an operator logs in the system;
the Web-GIS service calling module is used for calling Web-GIS data;
the visual information display module is used for generating a power distribution network topological structure;
the power distribution network computing module comprises the following working steps:
after logging in the system, an operator calls a calculation function combined with Web-GIS display,
step 1, HTTP sends a request to a server, and the server identifies a power distribution network calculation request decision symbol and jumps to the calculation function part;
step 2, inquiring a power distribution network calculation table in a database, and respectively assigning data to the newly-built node class object and the newly-built line class object; wherein the load flow is calculated as:
P{Point_ID,Voltage_A,Voltage_B,Voltage_C,Angle_A,Angle_B,Angle_C}、
B{Branch_ID,Head_Point_ID,Tail_Point_ID,Z_AA,Z_AB,Z_AC,Z_BA,Z_BB,Z_CC,Z_CA,Z_CB,Z_CC}；
and 3, dividing the load value of each node by the corresponding voltage value, assigning the load value to the branch current taking the node as the last node, and updating the branch current taking the node as the last node from the tail end of the power distribution network to the power supply node, wherein the calculation formula is as follows:
step 4, traversing all the branches, solving the calculation parameters of each branch, and assigning the calculation values and the correction values to the branches, wherein the voltage drop calculation formula is as follows:
and 5, from the power supply node, subtracting the voltage drop calculated in the step 4 corresponding to each branch by using the voltage of the first node of each branch, and assigning the voltage drop to the node voltage value of the tail node of each branch, wherein the calculation formula is as follows:
and 6, subtracting the current calculated voltage value from the last calculated voltage result value, taking the modulus value of the current calculated voltage value and comparing the modulus value with the precision, if the modulus value of any one phase of any one node is larger than the precision, based on the current updated voltage value of each node, re-performing the step 3, otherwise, continuing to calculate the formula as follows:
step 7, calling a checking function to check the calculation result, if the calculation result is unreasonable, returning errors, and if the calculation result is reasonable, continuing the next step;
and 8, reading the Web-GIS information data of each node from the database, assigning the Web-GIS information data to the coordinate parameters of the node class, sealing the node class in a session, overlapping the node layer with the layer provided by the Web-GIS service on the page, writing the load flow calculation voltage result of each corresponding node, and finally returning the page to the browser through HTTP to be presented to an operator.
2. The Web-GIS based distributed power intelligent analysis and decision making system of claim 1, wherein: the visual information display module comprises the following working steps:
the operator logs into the system and invokes the topology map generation function,
step 1, sending a request to a server, identifying a request judgment symbol of a topological graph by the server, and skipping to a visual information display module of a power distribution network;
step 2, randomly generating node coordinates in the topological graph panel, and setting a correlation coefficient based on the coordinates and the related topological structure, so as to calculate the attraction and the repulsion between each node and other nodes, wherein the calculation formula is as follows:
V{Vertice_ID,X,Y}；
step 3, calculating the attraction force and the repulsion force according to the attraction force calculation model and the repulsion force model,
in the formula, k1Is the proportionality coefficient, dis (V)i,Vj) Is the distance between two nodes of the single-line diagram, d1A natural distance for identifying whether or not gravity is generated, SvIs a fixed value, d1Is a natural distance, mvIs the minimum distance, d, at which the two node icons do not overlapgRepresenting the number of lines connecting the nodes; calculating resultant force, decomposing stress, moving the nodes according to the direction of the resultant force, continuing if specified times are carried out, and otherwise, carrying out the step 2 again on the basis of the updated coordinates of each node;
and 4, matching the updated topological graph data after optimization with the node geographic coordinates, packaging the coordinates in a session, transmitting the coordinates to a page, automatically wiring according to an avoidance rule, and finally transmitting the page to a browser through HTTP to be presented to an operator.
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