CN106815243B - Intelligent Analysis and Decision System of Distributed Power Supply Based on Web-GIS - Google Patents

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

Intelligent Analysis and Decision System of Distributed Power Supply Based on Web-GIS

technical field

The invention relates to the field of distribution network management systems, in particular to a Web-GIS-based intelligent analysis and decision-making system for distributed power sources.

Background technique

There are many kinds of distribution network analysis and management systems. Most of these software are C/S (client/server) structures, and clients need to be installed. The development language of the client determines its operating environment, which leads to the operating limitations of the C/S structure. In addition, most geographic information systems (GIS) use surveying and mapping data, which has a long development cycle and is difficult to upgrade and maintain. At present, power companies urgently need an intelligent distribution network analysis and decision-making system that can adapt to the rapid development of distributed power generation, is easy to maintain, and realizes cross-platform analysis.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an intelligent analysis and decision-making system for distribution network with distributed power source with B/S structure. The system adopts B/S structure and is developed by Java advanced programming. It realizes the independent calculation of functional modules and the cross-platform operation of the system.

In order to achieve the above purpose, the present invention provides the following technical solutions: a Web-GIS-based intelligent analysis and decision-making system for distributed power sources, the system adopts a B/S structure, namely a browser/server structure, and the system includes a distribution network Calculation module, Web-GIS service calling module, and visual information display module; the system combines the results of distribution network calculation with Web-GIS data to automatically generate distribution network topology. The system has the function of calling combined with Web-GIS to display and calculate And call the topology map generation function;

The distribution network calculation module is used for the operator to log in to the system and invoke the display calculation combined with Web-GIS;

The Web-GIS service calling module is used to call Web-GIS data;

The visual information display module is used to generate the distribution network topology.

The working steps of the distribution network calculation module are: after the operator logs in to the system, the operator invokes the display calculation function combined with Web-GIS,

Step 1, HTTP sends a request to the server, the server identifies the distribution network calculation request qualifier, and jumps to the calculation function part;

Step 2, query the distribution network calculation example table in the database, and assign the data to the newly created node class objects and line class objects respectively; the power flow calculation is as follows:

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};

Step 3: Divide the load value of each node by the corresponding voltage value, and assign it to the branch current with the node as the end node, and then update the power supply nodes from the end of the power distribution network to take it as the end node. The branch current of , the calculation formula is:

Step 4, traverse all branches, find the calculation parameters of each branch, and assign the calculated value and correction value to the branch, where the voltage drop calculation formula is:

Step 5, starting from the power supply node, subtract the voltage drop calculated in step 4 corresponding to the branch from the voltage of the first node of each branch, and assign it to the node voltage value of the end node of the branch, the calculation formula for:

Step 6: Compare the modulo value of the current calculated voltage value with the last calculated voltage result value and compare the modulo value with the accuracy. If the value is the basis, go to step 3 again, otherwise continue, the calculation formula is:

Step 7, call the verification function to verify the calculation result, if it is unreasonable, return an error, if it is reasonable, continue to the next step;

Step 8: Read the Web-GIS information data of each node from the database, assign the coordinate parameters of the node class, encapsulate the node class into the session, and then overlay the node layer with the layer provided by the Web-GIS service on the page. List the power flow calculation voltage results of each corresponding node, and finally return the page to the browser through HTTP and present it to the operator.

The working steps of the visualized information display module are as follows: after the operator logs in to the system, the topological map generation function is invoked,

Step 1, send a request to the server, the server identifies the request qualifier of the topology map, and jumps to the distribution network visualization information display module;

Step 2: Randomly generate the node coordinates in the topology map panel, and then set the correlation coefficient based on these coordinates and the related topology structure, so as to calculate the attraction and repulsion between each node and other nodes. The calculation formula is:

V{Vertice_ID,X,Y};

Step 3, according to the gravitational calculation model and the repulsive force model of the following formula to obtain the gravitational force and the repulsive force,

In the formula, k ₁ is the proportionality coefficient, dis(V _i , V _j ) is the distance between two nodes of the one-line diagram, d ₁ is the natural distance that identifies whether gravity is generated or not, S _v is a fixed value, d ₁ is the natural distance, m _v is the minimum distance when the icons of the two nodes do not overlap, d _g represents the number of lines connecting the nodes; then calculate the resultant force, decompose the force, and move the nodes in the direction of the resultant force. number of times, continue, otherwise, repeat step 2 based on the updated coordinates of each node;

Step 4: Match the updated topology map data and the node geographic coordinates according to the optimization, and then encapsulate these coordinates in the session, pass them to the page, automatically route according to the avoidance rules, and finally pass the page to the browser through HTTP and present it to the operator. .

The beneficial effects of using the above technical solutions are: the system adopts B/S structure, the interaction between the system and the operator is through the browser, and the system can realize cross-platform operation and maintenance; using the SSH framework in Java advanced programming, not only high development efficiency, but also It can also directly write function files or projects according to new business goals, and then import them into the server without updating the client, so it is very convenient to develop new functions, and can provide external interfaces for the extension development of the system; call Web-GIS service, instead of putting Web-GIS and the system developed by the present invention on the same server, reduces the running cost of the server.

Description of drawings

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of an intelligent analysis and decision-making system for a distribution network with distributed power sources with a B/S structure according to the present invention.

Detailed ways

The preferred embodiments of a Web-GIS-based intelligent analysis and decision-making system for distributed power sources of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1, a specific implementation of a Web-GIS-based distributed power source intelligent analysis and decision-making system of the present invention, the system adopts a B/S structure, that is, a browser/server structure, and is developed by Java advanced programming, The system includes three functional modules: distribution network calculation, Web-GIS service invocation, and visual information display. The results of distribution network calculation and Web-GIS data are combined to automatically generate distribution network topology. Through the Java high-level language SSH The framework is implemented, the distribution network operator logs in the browser and selects the required business, and the round-trip information is completed through HTTP, providing the operator to log in to the system to call the calculation process combined with Web-GIS and to call the topology after the operator logs in to the system The process of graph generation has two functions.

After the operator completes the login, there are two operations:

"Calculation Analysis of Distribution Network" and "Visualization Information of Distribution Network". When the operator checks the calculation information, the function of viewing the calculation and analysis of the distribution network is activated, and continues to request the calculation function module for the distribution network analysis information; during the calculation, the verification will be carried out to confirm the reasonableness and correctness of the result, and an error will be returned if it is an error. ; If it is correct, then request the geographic layer from the Web-GIS server to realize layer overlay display. When the operator checks the topology information, the random topology layout function is first activated and the random layout result is returned, and then the topology layout optimization is requested, and automatic routing is realized according to the avoidance rules on the returned optimization result, thereby generating a topology map and passed to the browser for display.

1. The operator chooses to view the distribution network analysis data under Web‐GIS

a) Click the distribution network calculation and analysis button, the server side identifies the calculation data identifier of the submitted form through the interceptor function in SSH (Struts2, Spring, Hibernet framework), such as power flow, reliability calculation, etc., and calls the corresponding function module;

b) Use the node class constructed by Java to call the basic data of the distribution network to realize the initialization process under the condition of three-phase asymmetry of the distribution network;

c) Carry out the calculation related to the distribution network requested by the user, assign the result to the element in the corresponding node class, encapsulate the node data into the session session, and request the verification function module for verification;

d) After verification, if the result is unreasonable, return an error, otherwise execute e);

e) When the verification is correct, based on the node GIS data table, extract the geographic information data, encapsulate the calculation result in the session, and request the Web-GIS service;

f) Result feedback in combination with Web-GIS services.

2. The operator chooses to view the visualization of the distribution network topology

a) Click the distribution network topology visualization button, the server identifies the topology map request identifier through the SSH interceptor, and calls the topology map to automatically generate the function module;

b) Call the distribution network topology information data from the database, call the random function, and generate random coordinates;

c) Call the gravity-repulsion optimization algorithm to optimize the layout of the distribution network topology;

d) Encapsulate and return the topology map optimization results, complete automatic routing in the returned page, and complete the visualization task.

The detailed working steps of the distribution network calculation module are as follows: after the operator logs in to the system, the operator invokes the display calculation function combined with Web-GIS,

Step 1, HTTP sends a request to the server, the server identifies the distribution network calculation request qualifier, and jumps to the calculation function part;

Step 2, query the distribution network calculation example table in the database, and assign the data to the newly created node class objects and line class objects respectively; the power flow calculation is as follows:

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};

Step 3: Divide the load value of each node by the corresponding voltage value, and assign it to the branch current with the node as the end node, and then update the power supply nodes from the end of the power distribution network to take it as the end node. The branch current of , the calculation formula is:

Step 4, traverse all branches, find the calculation parameters of each branch, and assign the calculated value and correction value to the branch, where the voltage drop calculation formula is:

Step 5, starting from the power supply node, subtract the voltage drop calculated in step 4 corresponding to the branch from the voltage of the first node of each branch, and assign it to the node voltage value of the end node of the branch, the calculation formula for:

Step 6: Compare the modulo value of the current calculated voltage value with the last calculated voltage result value and compare the modulo value with the accuracy. If the value is the basis, go to step 3 again, otherwise continue, the calculation formula is:

Step 7, call the verification function to verify the calculation result, if it is unreasonable, return an error, if it is reasonable, continue to the next step;

Step 8: Read the Web-GIS information data of each node from the database, assign the coordinate parameters of the node class, encapsulate the node class into the session, and then overlay the node layer with the layer provided by the Web-GIS service on the page. List the power flow calculation voltage results of each corresponding node, and finally return the page to the browser through HTTP and present it to the operator.

The detailed steps of the visualized information display module are as follows: after the operator logs in to the system, the operator invokes the function of generating the topology map,

Step 1, send a request to the server, the server identifies the request qualifier of the topology map, and jumps to the distribution network visualization information display module;

Step 2: Randomly generate the node coordinates in the topology map panel, and then set the correlation coefficient based on these coordinates and the related topology structure, so as to calculate the attraction and repulsion between each node and other nodes. The calculation formula is:

V{Vertice_ID,X,Y};

Step 3, according to the gravitational calculation model and the repulsive force model of the following formula to obtain the gravitational force and the repulsive force,

In the formula, k ₁ is the proportionality coefficient, dis(V _i , V _j ) is the distance between two nodes of the one-line diagram, d ₁ is the natural distance that identifies whether gravity is generated or not, S _v is a fixed value, d ₁ is the natural distance, m _v is the minimum distance when the icons of the two nodes do not overlap, d _g represents the number of lines connecting the nodes; then calculate the resultant force, decompose the force, and move the nodes in the direction of the resultant force. number of times, continue, otherwise, repeat step 2 based on the updated coordinates of each node;

Step 4: Match the updated topology map data and the node geographic coordinates according to the optimization, and then encapsulate these coordinates in the session, pass them to the page, automatically route according to the avoidance rules, and finally pass the page to the browser through HTTP and present it to the operator. .

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the present invention. protected range.

Claims (2)

1. based on the distributed power intelligent analysis and decision-making system of Web-GIS, it is characterized in that: the described distributed power intelligent analysis and decision-making system based on Web-GIS adopts B/S structure, both browser/server structure, described The system includes a distribution network calculation module, a Web-GIS service invocation module, and a visual information display module; the system combines the results of the distribution network calculation with the Web-GIS data to automatically generate the distribution network topology structure, and the system has the ability to call Combined with Web-GIS to display computing function and call topology map generation function; The distribution network calculation module is used for the operator to log in to the system and invoke the display calculation combined with Web-GIS; The Web-GIS service calling module is used to call Web-GIS data; The visualized information display module is used to generate a distribution network topology structure; The working steps of the distribution network calculation module are: After the operator logs in to the system, he calls the display calculation function combined with Web-GIS, Step 1, HTTP sends a request to the server, the server identifies the distribution network calculation request qualifier, and jumps to the calculation function part; Step 2, query the distribution network calculation example table in the database, and assign the data to the newly created node class objects and line class objects respectively; the power flow calculation is as follows: 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}; Step 3: Divide the load value of each node by the corresponding voltage value, and assign it to the branch current with the node as the end node, and then update the power supply nodes from the end of the power distribution network to take it as the end node. The branch current of , the calculation formula is:

Step 4, traverse all branches, find the calculation parameters of each branch, and assign the calculated value and correction value to the branch, where the voltage drop calculation formula is:

Step 5, starting from the power supply node, subtract the voltage drop calculated in step 4 corresponding to the branch from the voltage of the first node of each branch, and assign it to the node voltage value of the end node of the branch, the calculation formula for:

Step 6: Compare the modulo value of the current calculated voltage value with the last calculated voltage result value and compare the modulo value with the accuracy. If the value is the basis, go to step 3 again, otherwise continue, the calculation formula is:

Step 7, call the verification function to verify the calculation result, if it is unreasonable, return an error, if it is reasonable, continue to the next step; Step 8: Read the Web-GIS information data of each node from the database, assign the coordinate parameters of the node class, encapsulate the node class into the session, and then overlay the node layer with the layer provided by the Web-GIS service on the page, List the power flow calculation voltage results of each corresponding node, and finally return the page to the browser through HTTP and present it to the operator. 2. The distributed power intelligent analysis and decision-making system based on Web-GIS according to claim 1, is characterized in that: the working step of described visualization information display module is: After the operator logs in to the system, the topology map generation function is called, Step 1, send a request to the server, the server identifies the request qualifier of the topology map, and jumps to the distribution network visualization information display module; Step 2: Randomly generate the node coordinates in the topology map panel, and then set the correlation coefficient based on these coordinates and the related topology structure, so as to calculate the attraction and repulsion between each node and other nodes. The calculation formula is: V{Vertice_ID,X,Y}; Step 3, according to the gravitational calculation model and the repulsive force model of the following formula to obtain the gravitational force and the repulsive force,

In the formula, k ₁ is the proportionality coefficient, dis(V _i , V _j ) is the distance between two nodes of the one-line diagram, d ₁ is the natural distance that identifies whether gravity is generated or not, S _v is a fixed value, d ₁ is the natural distance, m _v is the minimum distance when the icons of the two nodes do not overlap, d _g represents the number of lines connecting the nodes; then calculate the resultant force, decompose the force, and move the nodes in the direction of the resultant force. number of times, continue, otherwise, repeat step 2 based on the updated coordinates of each node; Step 4: Match the updated topology map data and the node geographic coordinates according to the optimization, and then encapsulate these coordinates in the session, pass them to the page, automatically route according to the avoidance rules, and finally pass the page to the browser through HTTP and present it to the operator. .

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