CN109510190B - Traction substation reliability analysis method and system based on JavaWeb - Google Patents
Traction substation reliability analysis method and system based on JavaWeb Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a reliability analysis method for a traction substation based on JavaWeb, which comprises the following steps: s1: dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer; s2: respectively generating fault trees for the bus layer, the transformer layer and the contact network layer according to the wiring diagram, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent; s3: and analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result. The invention also discloses a traction substation reliability analysis system based on JavaWeb. According to the invention, through the steps, the fault tree is effectively applied to the whole traction system, the universality is very strong, and meanwhile, the detection result is more practical due to the fact that the bus layer, the transformer layer and the contact network layer generate the independent fault tree.
Description
Technical Field
The invention relates to the technical field of power engineering, in particular to a method and a system for analyzing the reliability of a traction substation based on JavaWeb.
Background
With the rapid development of national economy and the increase of urban traffic volume, urban rail transit is a new transportation means, plays an increasingly important role in urban development and daily life of citizens, and an urban rail transit power supply system provides electric energy for the urban rail transit, so that once the power supply is interrupted, the urban rail transit transportation paralysis can be caused, the safety of passengers can be endangered, and property loss can be caused, so that the research on the reliability problem of a traction power supply system is more important.
The traction power supply system has numerous wiring and complex element structure, and when the reliability analysis is carried out on the traction power supply system, the combination of each fault mode needs to be found, so that the weak link of the wiring of the traction power supply system can be found according to the calculation of the fault probability and the comparison of the structural importance, the rectification scheme can be further provided, and the monitoring link can be rearranged according to the comparison of the structural importance.
In the prior art, the fault analysis of the traction power supply system mostly focuses on the fault analysis of a contact network and establishes a fault tree by taking a subsystem as a node, and the analysis mode lacks general universality and cannot be popularized to the fault analysis of the whole traction power supply system.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, fault analysis of a traction power supply system mostly focuses on fault analysis of a contact network and a fault tree is established by taking a subsystem as a node, the analysis mode lacks general universality and cannot be popularized to fault analysis of the whole traction power supply system, and the invention aims to provide a method and a system for reliability analysis of a traction substation based on JavaWeb, so as to solve the problems.
The invention is realized by the following technical scheme:
the traction substation reliability analysis method based on JavaWeb comprises the following steps: s1: dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer; s2: respectively generating fault trees for the bus layer, the transformer layer and the contact network layer according to the wiring diagram, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent; s3: and analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result.
In the prior art, the fault analysis of the traction power supply system mostly focuses on the fault analysis of a contact network and establishes a fault tree by taking a subsystem as a node, and the analysis mode lacks general universality and cannot be popularized to the fault analysis of the whole traction power supply system.
When the system is applied, the wiring of the traction system is divided into the bus layer, the transformer layer and the contact network layer, so that the system can better meet the actual situation, the bus layer, the transformer layer and the contact network layer respectively generate the fault tree according to the wiring diagram, and the essence of generating the fault tree according to the wiring diagram is to take elements in the wiring diagram as fault tree nodes, so that the system is not only suitable for a contact network, but also can be extended to the transformer layer and the bus layer, has very strong universality, and the reliability of the bus layer, the transformer layer and the contact network layer is obtained through analysis by the tree nodes on the fault tree and according to the analysis result, so that the reliability of the whole system is obtained. According to the invention, through the steps, the fault tree is effectively applied to the whole traction system, the universality is very strong, and meanwhile, the detection result is more practical due to the fact that the bus layer, the transformer layer and the contact network layer generate the independent fault tree.
Further, step S2 includes the following sub-steps: s21: packaging element data in the traction system; s22: converting each element in the traction system into a tree node at a corresponding position; s23: and converting the line wiring diagram into a tree structure according to the tree nodes and generating a fault tree.
When the method is applied, in order to realize the conversion of the elements into the tree nodes, the method creatively adopts a data packaging technology, firstly packages element data so as to facilitate the subsequent node conversion programming, and then equates the elements into the corresponding tree nodes according to the packaged data, so that the tree nodes form a fault tree, and further realize the conversion of the elements in the line wiring diagram into the fault tree. The invention adopts data encapsulation to realize that elements in the traction system generate the fault tree according to the line wiring diagram, simplifies subsequent programming and improves the applicability of the invention.
Further, step S21 includes the following sub-steps: packaging the element name, the failure probability, the parent node name and the element number of the element into a class; and providing a data setting and acquiring method for the class.
When the invention is applied, the packaging technology adopted by the invention depends on the class in the Java technology, and the component data is packaged by adopting the class, so that the data can be conveniently set and read.
Further, step S22 includes the following sub-steps: converting the elements into nodes and acquiring a data structure and a father node reserved by each element; acquiring a pointer pointing to a descendant node of each node; nodes pointing to descendants are initialized.
When the method is applied, in order to accurately equate each element to the tree node of the fault tree, the method adopts a pointer mode to accurately position the element, the father node is equivalent to the upper-level element of the element, and the node equivalence of the element can be completed layer by layer through the pointer.
Further, step S23 includes the following sub-steps: s231: obtaining information of an unallocated node and obtaining a parent node of the node; s232: adding the node into a child node of a father node, and pointing a father pointer of the node to the father node; s233: s231 is executed again until all nodes are allocated.
When the invention is applied, when elements are distributed, the father node of the equivalent node of the element is considered, the element is added into the child node of the father node, and recursive operation is carried out, so that the rapid and accurate distribution of all nodes can be realized.
Further, step S3 includes the following sub-steps: s31: acquiring all paths of a root node and leaf nodes of a fault tree; s32: acquiring the fault probability of leaf nodes and summarizing the fault probability to the father node of each leaf node; s33: and summarizing the fault probability of all the child nodes to the father node of each child node until the fault probability is summarized to the root node.
When the method is applied, all paths of the root node and the leaf nodes of the fault tree are obtained firstly, in order to ensure the accuracy of fault probability summarization, the method summarizes the fault probability of each node through the paths to obtain the probability of all the nodes, and the child nodes are equivalent to a parallel connection mode, so that the probability of a father node can be obtained by multiplying all the probabilities; the method is applied to searching all paths, so that repeated summarization cannot occur during summarization, omission summarization cannot occur, detection accuracy is effectively improved, and codes are greatly simplified.
Further, the failure probability is represented by a minimal cut set.
A traction substation reliability analysis system based on JavaWeb comprises: JSP unit: the display device is used for displaying data and interfaces; servlet cell: the method is used for establishing various servlets to receive data of a browser layer; a Service unit: the system is used for processing the logic layer and interacting with the database; a Domain unit: the data encapsulation device is used for completing encapsulation of various data; the Dao unit: the system is used for completing the operations of adding, deleting, modifying and checking the database; the Service unit is also used for dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer; respectively generating fault trees for the bus layer, the transformer layer and the contact network layer, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent; and analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result.
Further, the Service unit includes: service1 unit: the system is used for interacting with the Dao layer to complete the data adding, deleting, modifying and checking operation; service2 unit: and the method is used for completing the calculation of the fault probability and the search of the minimum cut set and returning the calculation result.
When the method is applied, interaction with a user is completed from a Jsp unit display page, received data are transmitted to a Servlet unit, server-side code compiling is completed, a function of a corresponding Service unit is called through the Servlet unit, logic operation is completed, data adding, deleting, modifying and checking operations are completed through interaction between the Service1 unit and a Dao unit, fault probability calculation and minimum cut set searching are completed through the Service2 unit, a calculation result is returned, and display is performed on the Jsp unit. The invention adopts the B/S structure and the standardized structured programming, reduces the difficulty in the program development process, can put main energy on the realization of a bottom-layer algorithm, and deploys the program on the server by adopting the B/S structure, can reduce the occupation of resources and is convenient for the operation and the use of a user.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the traction substation reliability analysis method based on JavaWeb, the fault tree is effectively applied to the whole traction system through the steps, the universality is very strong, and meanwhile, the detection result is more practical due to the fact that the bus layer, the transformer layer and the contact network layer generate the independent fault tree;
2. the traction substation reliability analysis system based on JavaWeb adopts the B/S structure and the standard structured programming, reduces the difficulty in the program development process, can put main energy on the realization of a bottom-layer algorithm, and deploys the program on a server by adopting the B/S structure, can reduce the occupation of resources and is convenient for users to operate and use.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of an embodiment of the present invention;
FIG. 3 is a schematic view of an embodiment of the present invention;
FIG. 4 is a schematic view of an embodiment of the present invention;
FIG. 5 is a schematic view of an embodiment of the present invention;
FIG. 6 is a schematic diagram of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The invention relates to a traction substation reliability analysis method based on JavaWeb, which comprises the following steps: s1: dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer; s2: respectively generating fault trees for the bus layer, the transformer layer and the contact network layer according to the wiring diagram, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent; s3: and analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result.
In the implementation of the embodiment, the connection line of the traction system is divided into the bus layer, the transformer layer and the contact network layer, so that the system can better meet the actual situation, the bus layer, the transformer layer and the contact network layer respectively generate the fault tree according to the wiring diagram, and the essence of generating the fault tree according to the wiring diagram is to use elements in the wiring diagram as fault tree nodes, so that the system is not only suitable for a contact network, but also can be extended to the transformer layer and the bus layer, has very strong universality, and the reliability of the bus layer, the transformer layer and the contact network layer is obtained through analysis by the tree nodes on the fault tree and according to the analysis result, so that the reliability of the whole system is obtained. According to the invention, through the steps, the fault tree is effectively applied to the whole traction system, the universality is very strong, and meanwhile, the detection result is more practical due to the fact that the bus layer, the transformer layer and the contact network layer generate the independent fault tree.
Example 2
In this embodiment, on the basis of embodiment 1, step S2 includes the following sub-steps: s21: packaging element data in the traction system; s22: converting each element in the traction system into a tree node at a corresponding position; s23: and converting the line wiring diagram into a tree structure according to the tree nodes and generating a fault tree.
In the implementation of the embodiment, in order to convert the elements into the tree nodes, the data encapsulation technology is creatively adopted in the invention, the element data is encapsulated firstly, so that the subsequent node conversion programming is facilitated, then the elements are equivalent to the corresponding tree nodes according to the encapsulation data, so that the tree nodes form the fault tree, and further the elements in the line wiring diagram are converted into the fault tree. The invention adopts data encapsulation to realize that elements in the traction system generate the fault tree according to the line wiring diagram, simplifies subsequent programming and improves the applicability of the invention.
The specific code and flow are as follows:
example 3
In this embodiment, on the basis of embodiment 2, step S21 includes the following sub-steps: packaging the element name, the failure probability, the parent node name and the element number of the element into a class; and providing a data setting and acquiring method for the class.
In the implementation of this embodiment, the encapsulation technology adopted by the present invention relies on the class in the Java technology, and the component data is encapsulated by adopting this class, so that the data can be conveniently set and read.
The specific code and flow are as follows:
example 4
In this embodiment, on the basis of embodiment 2, step S22 includes the following sub-steps: converting the elements into nodes and acquiring a data structure and a father node reserved by each element; acquiring a pointer pointing to a descendant node of each node; nodes pointing to descendants are initialized.
In this embodiment, in order to accurately equate each element to a tree node of a fault tree, the present invention accurately locates the position of the element by using a pointer, where a parent node is equivalent to a previous-level element of the element, and node equivalence of the element can be completed layer by using the pointer.
The specific code and flow are as follows:
example 5
In this embodiment, on the basis of embodiment 2, step S23 includes the following sub-steps: s231: obtaining information of an unallocated node and obtaining a parent node of the node; s232: adding the node into a child node of a father node, and pointing a father pointer of the node to the father node; s233: s231 is executed again until all nodes are allocated.
In the implementation of this embodiment, when an element is allocated, the parent node of the equivalent node of the element is considered first, and the element is added to the child node of the parent node and recursive operation is performed, so that rapid and accurate allocation of all nodes can be realized.
The specific code and flow are as follows:
example 6
In this embodiment, on the basis of embodiment 1, step S3 includes the following sub-steps: s31: acquiring all paths of a root node and leaf nodes of a fault tree; s32: acquiring the fault probability of leaf nodes and summarizing the fault probability to the father node of each leaf node; s33: and summarizing the fault probability of all the child nodes to the father node of each child node until the fault probability is summarized to the root node. The failure probability is represented by a minimal cut set.
In the implementation of the embodiment, all paths of the root node and the leaf nodes of the fault tree are obtained first, in order to ensure the accuracy of fault probability summarization, the fault probabilities of all the nodes are summarized through the paths, the probabilities of all the nodes are obtained, and the child nodes are equivalent to a parallel connection mode, so that the probability of a parent node can be obtained by multiplying all the probabilities; the method is applied to searching all paths, so that repeated summarization cannot occur during summarization, omission summarization cannot occur, detection accuracy is effectively improved, and codes are greatly simplified.
The specific code and flow are as follows:
as can be seen from the above figures, the code of the invention is very concise on the premise of good applicability, thereby being beneficial to popularization and application.
Example 7
As shown in fig. 1, the system for analyzing reliability of a traction substation based on java web of the present invention includes: JSP unit: the display device is used for displaying data and interfaces; servlet cell: the method is used for establishing various servlets to receive data of a browser layer; a Service unit: the system is used for processing the logic layer and interacting with the database; a Domain unit: the data encapsulation device is used for completing encapsulation of various data; the Dao unit: the system is used for completing the operations of adding, deleting, modifying and checking the database; the Service unit is also used for dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer; respectively generating fault trees for the bus layer, the transformer layer and the contact network layer, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent; and analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result. The Service unit includes: service1 unit: the system is used for interacting with the Dao layer to complete the data adding, deleting, modifying and checking operation; service2 unit: and the method is used for completing the calculation of the fault probability and the search of the minimum cut set and returning the calculation result.
In the implementation of this embodiment, the interaction with the user is completed from the JSP cell display page, the received data is transferred to the Servlet cell, the server-side code programming is completed, the Servlet cell calls the function of the corresponding Service cell to complete the logic operation, the Service1 cell and the Dao cell perform the interaction to complete the data adding, deleting, modifying and checking operation, the Service2 cell completes the calculation of the failure probability and the search of the minimum cut set, and the calculation result is returned to be displayed in the JSP cell. The invention adopts the B/S structure and the standardized structured programming, reduces the difficulty in the program development process, can put main energy on the realization of a bottom-layer algorithm, and deploys the program on the server by adopting the B/S structure, can reduce the occupation of resources and is convenient for the operation and the use of a user.
Example 8
As shown in fig. 2 to 6, in this embodiment, on the basis of embodiments 1 to 7, fig. 2 shows a 35kV traction system wiring system, and an analysis is made by taking as an example whether a 35kV traction power supply system can normally supply power to an uplink catenary 1, the traction system wiring system is divided into three layers, a first layer is a part above an ACI section 35kV bus, which is called a bus layer, a second layer is a layer from the 35kV bus to an upper section of a DC1500V direct current line, which is a transformer layer, and a third layer is a layer from a lower section of the DC bus to the uplink catenary. And carrying out modeling analysis on three layers.
Instructions for use of the procedure:
establishing a project, and inputting data in a layered manner;
when inputting data, the name of each element is required to be input, the failure probability of each element and the name of the upper-layer element of each element, namely the parent element of each element;
after all data are input, checking the data, and judging whether to carry out addition, deletion, modification and checking operation;
and after the detection is finished, calculating, and finally outputting the result as the fault probability of each fault mode under the given probability, wherein all the fault modes are all the minimum cut sets of the fault tree.
The output data of the bus layer is shown in figure 3, the output data of the transformer layer is shown in figures 4-5, and the output data of the contact network layer is shown in figure 6; the invention can effectively find out the fault probability of each node, thereby selecting weak points in the system reliability; through the underlying computation of the JavaWeb, the final computation result can be presented in a browser mode, so that all the failure modes, the probability of each mode and the structural importance of each element in each layer can be seen. Convenient for maintenance and further rectification.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The reliability analysis method of the traction substation based on JavaWeb is characterized by comprising the following steps:
s1: dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer;
s2: respectively generating fault trees for the bus layer, the transformer layer and the contact network layer according to the wiring diagram, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent;
s3: analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result;
step S2 includes the following substeps:
s21: packaging element data in the traction system;
s22: converting each element in the traction system into a tree node at a corresponding position;
s23: converting the line wiring diagram into a tree structure according to the tree nodes and generating a fault tree;
step S23 includes the following substeps:
s231: obtaining information of an unallocated node and obtaining a parent node of the node;
s232: adding the node into a child node of a father node, and pointing a father pointer of the node to the father node;
s233: s231 is executed again until all nodes are allocated.
2. The java web-based traction substation reliability analysis method according to claim 1, characterized in that step S21 comprises the following sub-steps:
packaging the element name, the failure probability, the parent node name and the element number of the element into a class;
and providing a data setting and acquiring method for the class.
3. The java web-based traction substation reliability analysis method according to claim 1, characterized in that step S22 comprises the following sub-steps:
converting the elements into nodes and acquiring a data structure and a father node reserved by each element;
acquiring a pointer pointing to a descendant node of each node;
nodes pointing to descendants are initialized.
4. The java web-based traction substation reliability analysis method according to claim 1, characterized in that step S3 comprises the following sub-steps:
s31: acquiring all paths of a root node and leaf nodes of a fault tree;
s32: acquiring the fault probability of leaf nodes and summarizing the fault probability to the father node of each leaf node;
s33: summarizing the fault probability of all child nodes to the father node of each child node until the fault probability is summarized to the root node;
the failure probability summarizing method comprises the following steps: the child nodes are parallel child nodes, and the fault probabilities of the child nodes are summarized to the corresponding father node probabilities in a multiplication mode.
5. The JavaWeb-based traction substation reliability analysis method according to claim 2, characterized in that the fault probability is represented by a minimal cut set.
6. The reliability analysis system of the JavaWeb-based traction substation adopting the method of any one of claims 1 to 5 is characterized by comprising the following steps:
JSP unit: the display device is used for displaying data and interfaces;
servlet cell: the method is used for establishing various servlets to receive data of a browser layer;
a Service unit: the system is used for processing the logic layer and interacting with the database;
a Domain unit: the data encapsulation device is used for completing encapsulation of various data;
the Dao unit: the system is used for completing the operations of adding, deleting, modifying and checking the database;
the Service unit is also used for dividing the wiring of the traction system into a bus layer, a transformer layer and a contact net layer; respectively generating fault trees for the bus layer, the transformer layer and the contact network layer, wherein the fault trees of the bus layer, the transformer layer and the contact network layer are mutually independent; and analyzing according to tree nodes on the fault tree and obtaining the reliability of the bus layer, the transformer layer and the contact network layer according to an analysis result.
7. The JavaWeb-based traction substation reliability analysis method according to claim 6, wherein the Service unit comprises:
service1 unit: the system is used for interacting with the Dao layer to complete the data adding, deleting, modifying and checking operation;
service2 unit: and the method is used for completing the calculation of the fault probability and the search of the minimum cut set and returning the calculation result.
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