CN108762909B - Short circuit current scanning system and method for power network - Google Patents
Short circuit current scanning system and method for power network Download PDFInfo
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- CN108762909B CN108762909B CN201810556194.1A CN201810556194A CN108762909B CN 108762909 B CN108762909 B CN 108762909B CN 201810556194 A CN201810556194 A CN 201810556194A CN 108762909 B CN108762909 B CN 108762909B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/48—Program initiating; Program switching, e.g. by interrupt
- G06F9/4806—Task transfer initiation or dispatching
- G06F9/4843—Task transfer initiation or dispatching by program, e.g. task dispatcher, supervisor, operating system
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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]
Abstract
The invention relates to a short-circuit current scanning system and a method of a power network, wherein the method comprises the following steps: the access controller receives a short-circuit current scanning request of a user terminal, wherein the short-circuit current scanning request comprises network information to be scanned; the access controller calls corresponding network source data from the data storage according to the short-circuit current scanning request, and sends the network source data and the network information to be scanned to the task scheduler; the task scheduler acquires fault node information in a network to be scanned according to the received network source data and the network information to be scanned, generates a short-circuit current scanning task of a fault node, and maps the short-circuit current scanning task of the fault node into a server; and the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returns the short-circuit current scanning result to the user terminal. The method has the advantages of safe and efficient data storage, unified operation result and high short-circuit current scanning efficiency.
Description
Technical Field
The invention relates to the technical field of power networks, in particular to a short-circuit current scanning system and a short-circuit current scanning method for a power network.
Background
In recent years, as the requirement for the operation of the power network becomes more and more refined, the real-time analysis and the online check of the power network become more important, and the requirement for analyzing the speed of the power network becomes higher and higher.
In the analysis of the power network, the calculation of the short-circuit current is the premise of the selection of electrical equipment and the setting calculation of electrical protection, and is an important basis for the planning, design and operation of a power system. With the development and the expansion of the power network, the size of the power network is larger and larger, and the calculation amount of the short-circuit current scanning is larger and larger. The calculation speed of short-circuit current scanning is increased, and the analysis speed of the power system can be effectively increased.
In the existing short-circuit current scanning of the power network, for example, the short-circuit current scanning based on the electromagnetic transient model of the power system can obtain an accurate result, but the operation speed is too slow, and the operation scale is limited, so that the short-circuit current scanning efficiency of the power network is low.
Disclosure of Invention
Accordingly, it is desirable to provide a short-circuit current scanning system and method for a power network, which aims at the technical problem of low short-circuit current scanning efficiency of the existing power network.
A short circuit current scanning system for an electrical power network, comprising: an access controller, a data storage, a task scheduler and a server;
the access controller is respectively connected with the data memory and the task scheduler, the data memory and the task scheduler are respectively connected with the server, and the access controller is in communication connection with the user terminal;
the access controller is used for receiving a short-circuit current scanning request of a user terminal, calling corresponding network source data in the data memory, and sending the network source data and network information to be scanned to the task scheduler;
the task scheduler is used for receiving network source data and network information to be scanned, generating a short-circuit current scanning task, and mapping the short-circuit current scanning task into a server;
and the server is used for processing the received short-circuit current scanning task, acquiring a short-circuit current scanning result and returning the short-circuit current scanning result to the user terminal.
In the short-circuit current scanning system of the power network, different user terminals can send short-circuit current scanning requests to the access controller, the access controller receives the short-circuit current scanning requests of the user terminals, calls short-circuit current scanning data in the data storage to send the short-circuit current scanning data to the task scheduler, the task scheduler distributes the generated short-circuit current scanning tasks to the server, and the server processes the short-circuit current scanning tasks and returns short-circuit current scanning results to the user terminals. Therefore, user terminals of different enterprises can acquire the same source data through the data storage, and generate short-circuit current scanning tasks with the same calculation method through the scheduling manager, so that the difference of results caused by different enterprises adopting different data or calculation methods is avoided; the short-circuit current scanning task is uniformly configured on the server to be processed through the scheduling manager, compared with the single-machine short-circuit current scanning operation, the short-circuit current scanning operation processing can be quickly realized, and the short-circuit current scanning operation processing method has the advantages of high short-circuit current scanning speed, safe and efficient data storage and uniform operation results.
In one embodiment, the server comprises a multi-core processor, and the multi-core processor is used for processing the short-circuit current scanning task in parallel in a plurality of threads and acquiring the short-circuit current scanning result of the power system.
According to the technical scheme of the embodiment, through the multi-core processor arranged in the server, the system can process the short-circuit current scanning task in parallel by using a plurality of threads in a plurality of cores integrated in the multi-core processor, so that more tasks are executed within a certain time, and the budget efficiency of the short-circuit current scanning task is remarkably improved.
A short-circuit current scanning method of a power network of a short-circuit current scanning system of the power network according to any of the above embodiments, the method comprising:
the access controller receives a short-circuit current scanning request of a user terminal, wherein the short-circuit current scanning request comprises network information to be scanned;
the access controller calls corresponding network source data from a data storage according to the short-circuit current scanning request, and sends the network source data and the network information to be scanned to a task scheduler;
the task scheduler acquires fault node information in a network to be scanned according to received network source data and network information to be scanned, generates a short-circuit current scanning task of a fault node, and maps the short-circuit current scanning task of the fault node into a server;
and the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returns the short-circuit current scanning result to the user terminal.
According to the short-circuit current scanning method of the power network, different user terminals can send short-circuit current scanning requests to the access controller, the access controller receives the short-circuit current scanning requests of the user terminals, calls short-circuit current scanning data in the data storage to send the short-circuit current scanning data to the task scheduler, the task scheduler distributes the generated short-circuit current scanning tasks to the server, and the server processes the short-circuit current scanning tasks and returns short-circuit current scanning results to the user terminals. Therefore, user terminals of different enterprises can acquire the same source data through the data storage, and generate short-circuit current scanning tasks with the same calculation method through the scheduling manager, so that the difference of results caused by different enterprises adopting different data or calculation methods is avoided; the short-circuit current scanning task is uniformly configured on the server to be processed through the scheduling manager, compared with the single-machine short-circuit current scanning operation, the short-circuit current scanning operation processing can be realized more quickly, and the short-circuit current scanning operation processing method has the advantages of unified operation results, safe and efficient data storage and high short-circuit current scanning efficiency.
In one embodiment, the access controller retrieves corresponding network source data from a data storage according to the short-circuit current scanning request, and sending the network source data and the network information to be scanned to a task scheduler includes:
the access controller sends a corresponding network source data request to a data memory according to the short-circuit current scanning request, wherein the network source data request carries information of the network source data required by the short-circuit current scanning;
the data storage receives a network source data request, scans the information of the required network source data according to the short-circuit current carried by the network source data request, searches the corresponding network source data, and returns the network source data to the access controller;
and the access controller receives the network source data and sends the network source data and the information of the network to be scanned to the task scheduler.
According to the technical scheme of the embodiment, the short-circuit current scanning related data which need to be operated by each enterprise are stored in a unified mode through the data storage device, data sharing of different enterprises is achieved, the access controller can search and call the needed data in the data storage device according to the requirement difference of the short-circuit current scanning requests of different user terminals, the efficiency of data storage and utilization can be effectively improved, and the uniformity of data acquisition of different enterprise terminals during short-circuit current scanning is guaranteed.
In one embodiment, after the access controller receives a short-circuit current scan request from a user terminal, the method further includes the steps of:
the access controller verifies the user terminal according to the received short-circuit current scanning request of the user terminal, judges whether the user terminal is the user terminal with the access authority, and if the user terminal is the user terminal with the access authority, executes the step that the access controller calls corresponding network source data from a data storage according to the short-circuit current scanning request.
According to the technical scheme of the embodiment, the access controller also verifies the user terminal after receiving the short-circuit current scanning request of the user terminal, and executes the subsequent steps of calling corresponding network source data from the data storage according to the short-circuit current scanning request after the verification is passed, so that only users meeting the preset authority conditions can read relevant data through the short-circuit current scanning system of the power network, the short-circuit current scanning result is obtained, and the safety of data storage and acquisition is improved.
In one embodiment, the task scheduler acquires fault node information in a network to be scanned according to received network source data and network information to be scanned, generates a short-circuit current scanning task of a fault node, and mapping the short-circuit current scanning task of the fault node to a server includes:
the task scheduler acquires fault node information in the network to be scanned according to the received network source data and the network information to be scanned;
and the task scheduler analyzes whether the complexity of the network to be scanned exceeds a set threshold value according to the received network information to be scanned, if the complexity of the network to be scanned does not exceed the set threshold value, a simplified short-circuit current scanning task of a fault node of the network to be scanned is generated, and the simplified short-circuit current scanning task is mapped into a server.
According to the technical scheme of the embodiment, aiming at the small network with low complexity, the function of the node admittance matrix calculation is not large, and the task of simplifying the operation of the network to be scanned can be selected and generated by utilizing the advantage of simple structure of the small network, and the simplified short-circuit current scanning task is mapped to the server. The operation is further simplified, and the operation efficiency is improved.
In one embodiment, after the task scheduler analyzes whether the complexity of the network to be scanned exceeds a set threshold according to the received network information to be scanned, the method further includes:
and if the complexity of the network to be scanned exceeds a set threshold value, calculating a node admittance matrix of nodes in the network to be scanned, performing LDU decomposition on the node admittance matrix, generating a node admittance matrix short-circuit current scanning task of each fault node, and mapping the node admittance matrix short-circuit current scanning task of each fault node into each thread of the server respectively.
According to the technical scheme of the embodiment, when the calculated complexity of the network to be scanned exceeds a set threshold, the network to be scanned which needs to be processed currently is large, if a conventional calculation scheme is large in calculation amount and low in calculation speed, a node admittance matrix of nodes in the network to be scanned can be calculated, the processing efficiency of the complex network is improved, the node admittance matrix is subjected to LDU decomposition, short-circuit current calculation tasks of all fault points are decomposed, the short-circuit current calculation tasks of all fault points are mapped into all threads of a server in a one-to-one correspondence mode respectively because the calculation of all fault points can be relatively independent, the short-circuit current calculation tasks of all fault points are processed in parallel through a plurality of threads of the server, and the short-circuit current scanning efficiency of the large complex network is effectively improved.
In one embodiment, the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returning the short-circuit current scanning result to the user terminal includes:
if the received short-circuit current scanning task of the fault node is a simplified short-circuit current scanning task, performing planet-triangle transformation on the network to be scanned, respectively eliminating other nodes except the fault node in the network to be scanned aiming at each fault node, obtaining a port equivalent impedance of the network to be scanned, taking the port equivalent impedance as the short-circuit impedance of the fault node, obtaining a short-circuit current scanning result of the fault node in the network to be scanned, and returning the short-circuit current scanning result to the user terminal.
According to the technical scheme of the embodiment, when the complexity of the network to be scanned is lower than the threshold value and the network is a small network, the simplified operation is performed on the network to be scanned through star-triangle transformation, and the operation efficiency is further improved.
In one embodiment, the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returning the short-circuit current scanning result to the user terminal includes:
if the received short-circuit current scanning task of the fault node is a node admittance matrix short-circuit current scanning task, in each thread mapped with the node admittance matrix short-circuit current scanning task, calculating a point location vector of the fault node according to fault node information in the thread, and calculating a short-circuit impedance of the fault node according to the point location vector and the node admittance matrix decomposed by the LDU;
and returning the short-circuit impedance result of the fault node calculated in each thread to the user terminal.
According to the technical scheme of the embodiment, the scanning tasks of the short-circuit current of each fault node generated by decomposition are processed in parallel in each thread of the server, and the calculation efficiency can be effectively improved.
Specifically, in one embodiment, the point location vector of the failed node is calculated by the following formula:
b＝{… 0i-1 1i 0i+1 …}
in the formula, b is a point location vector, b has n items in total, n is the number of nodes in the network to be scanned, and i is the serial number of a fault node in n nodes;
the short circuit impedance of the fault node is calculated by solving the following formula:
in the above formula, Yn×nIs a node admittance matrix of the network to be scanned, (Y)n×n)LDUFor the node admittance matrix after LDU decomposition, n is the node number of the nodes in the network to be scanned, X is the set vector and XiIs the ith term, Z, in the X vectori,SCIs the short circuit current of the failed node.
According to the technical scheme of the embodiment, the related parameters of the fault node are converted into the point position vector of the fault node, and the point position vector is substituted into the node admittance matrix of the network to be scanned for operation, so that the short-circuit impedance of each fault node is obtained, the calculation of the short-circuit impedance of the large-scale network is effectively simplified, and the operation efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a short-circuit current scanning system of a power network according to an embodiment;
FIG. 2 is a schematic flow chart of a short-circuit current scanning method of a power network according to an embodiment;
fig. 3 is a schematic flowchart of a short-circuit current scanning method of a power network according to another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one embodiment, as shown in fig. 1, there is provided a short circuit current scanning system of a power network, comprising: access controller 110, data store 120, task scheduler 130, and server 140;
the access controller 110 is respectively connected with the data storage 120 and the task scheduler 130, the data storage 120 and the task scheduler 130 are respectively connected with the server 140, and the access controller 110 is in communication connection with the user terminal 150;
the access controller 110 is configured to receive a short-circuit current scanning request from the user terminal 150, call corresponding network source data in the data storage 120, and send the network source data and network information to be scanned to the task scheduler 130;
the task scheduler 130 is configured to receive network source data and network information to be scanned, generate a short-circuit current scanning task, and map the short-circuit current scanning task to the server 140;
the server 140 is configured to process the received short-circuit current scanning task, obtain a short-circuit current scanning result, and return the short-circuit current scanning result to the user terminal 150.
The access controller 110 may be various hardware devices for receiving the access request of the user terminal 150 and performing communication interaction with the data storage 120 and the task scheduler 130, for example, may be a server 140 composed of a single or multiple computer clusters, or may be a dedicated device, etc. If a plurality of user terminals 150 are connected to the access controller 110, the access controller 110 may receive short-circuit current scanning requests of the plurality of user terminals 150 at the same time, and the system may process each short-circuit current scanning request independently without affecting each other.
The task scheduler 130 may be a device having computing processing and storing functions, for example, the task scheduler 130 may include a processor and a memory, the memory may store a short-circuit current algorithm program and a task management algorithm program, and the processor in the task scheduler 130 may perform decomposition, generation, and allocation of computing tasks by running the task management algorithm program stored in the memory according to the received network source data and the network information to be scanned, and uniformly allocate the short-circuit current computing tasks to private cloud resources, thereby improving the computing speed and ensuring uniformity of the computing method.
In the short-circuit current scanning system of the power network, different user terminals 150 may send a short-circuit current scanning request to the access controller 110, the access controller 110 receives the short-circuit current scanning request of the user terminal 150, calls short-circuit current scanning data in the data storage 120 to send to the task scheduler 130, the task scheduler 130 allocates the generated short-circuit current scanning task to the server 140, and the server 140 processes the short-circuit current scanning task and returns a short-circuit current scanning result to the user terminal 150. Therefore, the user terminals 150 of different enterprises can obtain the same source data through the data storage 120 and generate the short-circuit current scanning tasks of the same calculation method through the scheduling manager, thereby avoiding the difference of results caused by different enterprises adopting different data or calculation methods; the scheduling manager is used for uniformly allocating the short-circuit current scanning tasks on the server 140 to process the short-circuit current scanning tasks, so that compared with the single-machine short-circuit current scanning operation, the short-circuit current scanning operation can be rapidly realized, and the method has the advantages of high short-circuit current scanning speed, safe and efficient data storage and uniform operation results.
In one embodiment, the server 140 includes a multi-core processor, and the multi-core processor is configured to process the short-circuit current scanning task in parallel in a plurality of threads, and obtain a short-circuit current scanning result of the power system.
According to the technical scheme of the embodiment, through the multi-core processor arranged in the server 140, the system can process the short-circuit current scanning task in parallel by using a plurality of threads in a plurality of cores integrated in the multi-core processor, so that more tasks are executed within a certain time, and the budget efficiency of the short-circuit current scanning task is remarkably improved.
In one embodiment, as shown in fig. 2, there is provided a short-circuit current scanning method of a power network of a short-circuit current scanning system based on the power network according to any one of the above embodiments, the method including:
s210, an access controller receives a short-circuit current scanning request of a user terminal, wherein the short-circuit current scanning request contains network information to be scanned;
the network refers to a power network, and the network information to be scanned refers to relevant parameters of the power network which is set by the user terminal and needs to be scanned by the short-circuit current. Specifically, the network information to be scanned may include user-set calculation conditions, selected calculation data, and/or expected calculation time.
S220, the access controller calls corresponding network source data from a data storage according to the short-circuit current scanning request, and sends the network source data and the network information to be scanned to a task scheduler;
the network source data refers to all the relevant data of the power network required to be used when the short-circuit current scanning is performed for processing calculation, and the data can be prestored in the data storage, so that the access controller can conveniently retrieve part of the required data from the short-circuit current scanning request for subsequent calculation processing.
For example, the data storage may store data of all power networks required by different users, such as parameter information of node positions, voltage levels, and the like of the power networks in the whole city, and in this step, if the short-circuit current scanning of the power grid in a certain cell range is specified in the short-circuit current scanning of the user terminal received by the access controller, the access controller may retrieve relevant data of the power grid in the specified cell range from the data stored in the data storage, and send the data and the information of the network to be scanned to the task scheduler.
S230, the task scheduler acquires fault node information in the network to be scanned according to the received network source data and the network information to be scanned, generates a short-circuit current scanning task of a fault node, and maps the short-circuit current scanning task of the fault node into a server;
and S240, the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and the short-circuit current scanning result is returned to the user terminal.
According to the short-circuit current scanning method of the power network, different user terminals can send short-circuit current scanning requests to the access controller, the access controller receives the short-circuit current scanning requests of the user terminals, calls short-circuit current scanning data in the data storage to send the short-circuit current scanning data to the task scheduler, the task scheduler distributes the generated short-circuit current scanning tasks to the server, and the server processes the short-circuit current scanning tasks and returns short-circuit current scanning results to the user terminals. Therefore, user terminals of different enterprises can acquire the same source data through the data storage, and generate short-circuit current scanning tasks with the same calculation method through the scheduling manager, so that the difference of results caused by different enterprises adopting different data or calculation methods is avoided; the short-circuit current scanning task is uniformly configured on the server to be processed through the scheduling manager, compared with the single-machine short-circuit current scanning operation, the short-circuit current scanning operation processing can be realized more quickly, and the short-circuit current scanning operation processing method has the advantages of unified operation results, safe and efficient data storage and high short-circuit current scanning efficiency.
In one embodiment, as shown in fig. 3, after the access controller receives a short-circuit current scan request from a user terminal S210, the method further includes the steps of:
s211, an access controller verifies the user terminal according to a received short-circuit current scanning request of the user terminal, judges whether the user terminal is the user terminal with the access authority, and if the user terminal is the user terminal with the access authority, the access controller calls corresponding network source data from a data storage according to the short-circuit current scanning request.
Further, if the user terminal is a user terminal without access right, the request can be discarded, and a prompt message indicating that the verification fails is returned to the user terminal, so that the data security of the system is ensured, and the user experience is improved.
According to the technical scheme of the embodiment, the access controller also verifies the user terminal after receiving the short-circuit current scanning request of the user terminal, and executes the subsequent steps of calling corresponding network source data from the data storage according to the short-circuit current scanning request after the verification is passed, so that only users meeting the preset authority conditions can read relevant data through the short-circuit current scanning system of the power network, the short-circuit current scanning result is obtained, and the safety of data storage and acquisition is improved.
In one embodiment, as shown in fig. 3, the step S220 of the access controller retrieving, according to the short-circuit current scan request, corresponding network source data from a data storage, and sending the network source data and the network information to be scanned to a task scheduler includes:
s221, an access controller sends a corresponding network source data request to a data memory according to the short-circuit current scanning request, wherein the network source data request carries information of network source data required by the short-circuit current scanning;
s222, a data storage receives a network source data request, searches corresponding network source data according to information of network source data required by short-circuit current scanning carried by the network source data request, and returns the network source data to an access controller;
s223, the access controller receives the network source data and sends the network source data and the network information to be scanned to a task scheduler.
According to the technical scheme of the embodiment, the short-circuit current scanning related data which need to be operated by each enterprise are stored in a unified mode through the data storage device, data sharing of different enterprises is achieved, the access controller can search and call the needed data in the data storage device according to the requirement difference of the short-circuit current scanning requests of different user terminals, the efficiency of data storage and utilization can be effectively improved, and the uniformity of data acquisition of different enterprise terminals during short-circuit current scanning is guaranteed.
In an embodiment, as shown in fig. 3, the task scheduler in S230 acquires fault node information in a network to be scanned according to the received network source data and network information to be scanned, generates a short-circuit current scanning task of a fault node, and mapping the short-circuit current scanning task of the fault node to a server includes:
s231, the task scheduler acquires fault node information in the network to be scanned according to the received network source data and the network information to be scanned;
s232, the task scheduler analyzes whether the complexity of the network to be scanned exceeds a set threshold value according to the received network information to be scanned;
and S233, if the complexity of the network to be scanned does not exceed a set threshold, generating a simplified short-circuit current scanning task of the fault node of the network to be scanned, and mapping the simplified short-circuit current scanning task into a server.
The complexity of the network to be scanned may have a plurality of different calculation manners, for example, the complexity of the connection between nodes or the like may be determined according to the number of nodes included in the network to be scanned, and a numerical value representing the complexity of the network to be scanned may be obtained by performing weighted calculation.
According to the technical scheme of the embodiment, aiming at the small network with low complexity, the function of the node admittance matrix calculation is not large, and the task of simplifying the operation of the network to be scanned can be selected and generated by utilizing the advantage of simple structure of the small network, and the simplified short-circuit current scanning task is mapped to the server. The operation is further simplified, and the operation efficiency is improved.
Further, in an embodiment, as shown in fig. 3, after the analyzing, by the task scheduler, whether the complexity of the network to be scanned exceeds a set threshold according to the received network information to be scanned, the method further includes:
and S234, if the complexity of the network to be scanned exceeds a set threshold, calculating a node admittance matrix of nodes in the network to be scanned, performing LDU decomposition on the node admittance matrix, generating a node admittance matrix short-circuit current scanning task of each fault node, and mapping the node admittance matrix short-circuit current scanning task of each fault node into each thread of the server.
According to the technical scheme of the embodiment, when the calculated complexity of the network to be scanned exceeds a set threshold, the network to be scanned which needs to be processed currently is large, if a conventional calculation scheme is large in calculation amount and low in calculation speed, a node admittance matrix of nodes in the network to be scanned can be calculated, the processing efficiency of the complex network is improved, the node admittance matrix is subjected to LDU decomposition, short-circuit current calculation tasks of all fault points are decomposed, the short-circuit current calculation tasks of all fault points are mapped into all threads of a server in a one-to-one correspondence mode respectively because the calculation of all fault points can be relatively independent, the short-circuit current calculation tasks of all fault points are processed in parallel through a plurality of threads of the server, and the short-circuit current scanning efficiency of the large complex network is effectively improved.
In an embodiment, as shown in fig. 3, the step S240 of processing, by the server, the short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returning the short-circuit current scanning result to the user terminal includes:
s241, if the short-circuit current scanning task of the fault node received by the server is a simplified short-circuit current scanning task, the server performs planet-triangle transformation on the network to be scanned, respectively eliminates other nodes except the fault node in the network to be scanned aiming at each fault node, obtains an equivalent impedance of one port of the network to be scanned, takes the equivalent impedance as the short-circuit impedance of the fault node, obtains a short-circuit current scanning result of the fault node in the network to be scanned, and returns the short-circuit current scanning result to the user terminal.
According to the technical scheme of the embodiment, when the complexity of the network to be scanned is lower than the threshold value and the network is a small network, the simplified operation is performed on the network to be scanned through star-triangle transformation, and the operation efficiency is further improved.
In an embodiment, as shown in fig. 3, the step S240 of processing, by the server, the short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returning the short-circuit current scanning result to the user terminal includes:
s242, if the short-circuit current scanning task of the fault node received by the server is a node admittance matrix short-circuit current scanning task, the server calculates a point location vector of the fault node in each thread mapped with the node admittance matrix short-circuit current scanning task according to fault node information in the thread, and calculates a short-circuit impedance of the fault node according to the point location vector and the node admittance matrix decomposed by the LDU;
and returning the short-circuit impedance result of the fault node calculated in each thread to the user terminal.
According to the technical scheme of the embodiment, the scanning tasks of the short-circuit current of each fault node generated by decomposition are processed in parallel in each thread of the server, and the calculation efficiency can be effectively improved.
Specifically, in one embodiment, the point location vector of the failed node in S242 is calculated by the following formula:
b＝{… 0i-1 1i 0i+1 …}
in the formula, b is a point location vector, b has n items in total, n is the number of nodes in the network to be scanned, and i is the serial number of a fault node in n nodes;
s242 the short circuit impedance of the fault node is calculated by solving the following equation:
in the above formula, Yn×nIs a node admittance matrix of the network to be scanned, (Y)n×n)LDUFor the node admittance matrix after LDU decomposition, n is the node number of the nodes in the network to be scanned, X is the set vector and XiIs the ith term, Z, in the X vectori,SCIs the short circuit current of the failed node.
According to the technical scheme of the embodiment, the related parameters of the fault node are converted into the point position vector of the fault node, and the point position vector is substituted into the node admittance matrix of the network to be scanned for operation, so that the short-circuit impedance of each fault node is obtained, the calculation of the short-circuit impedance of the large-scale network is effectively simplified, and the operation efficiency is improved.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A short circuit current scanning system for an electrical power network, comprising: an access controller, a data storage, a task scheduler and a server;
the access controller is respectively connected with the data memory and the task scheduler, the data memory and the task scheduler are respectively connected with the server, and the access controller is in communication connection with different user terminals;
the access controller is used for receiving the short-circuit current scanning requests of different user terminals, calling corresponding network source data in the data memory according to the short-circuit current scanning requests of the user terminals, and sending the network source data and the network information to be scanned to the task scheduler;
the task scheduler is used for receiving network source data and network information to be scanned, generating a short-circuit current scanning task, and mapping the short-circuit current scanning task into a server;
and the server is used for processing the received short-circuit current scanning task, acquiring a short-circuit current scanning result and returning the short-circuit current scanning result to the corresponding user terminal.
2. The short-circuit current scanning system of the power network according to claim 1, wherein the server includes a multi-core processor, and the multi-core processor is configured to process short-circuit current scanning tasks in parallel in a plurality of threads to obtain a short-circuit current scanning result of the power system.
3. A short-circuit current scanning method of an electric power network based on a short-circuit current scanning system of an electric power network according to claim 1 or 2, the method comprising:
the access controller receives short-circuit current scanning requests of different user terminals, wherein the short-circuit current scanning requests comprise network information to be scanned;
the access controller calls corresponding network source data from a data storage according to the short-circuit current scanning request, and sends the network source data and the network information to be scanned to a task scheduler;
the task scheduler acquires fault node information in a network to be scanned according to received network source data and network information to be scanned, generates a short-circuit current scanning task of a fault node, and maps the short-circuit current scanning task of the fault node into a server;
and the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returns the short-circuit current scanning result to the corresponding user terminal.
4. The short-circuit current scanning method of the power network according to claim 3, wherein the access controller retrieves corresponding network source data from a data storage according to the short-circuit current scanning request, and sends the network source data and the to-be-scanned network information to a task scheduler, including:
the access controller sends a corresponding network source data request to a data memory according to the short-circuit current scanning request, wherein the network source data request carries information of the network source data required by the short-circuit current scanning;
the data storage receives a network source data request, scans the information of the required network source data according to the short-circuit current carried by the network source data request, searches the corresponding network source data, and returns the network source data to the access controller;
and the access controller receives the network source data and sends the network source data and the information of the network to be scanned to the task scheduler.
5. The short circuit current scanning method for power network according to claim 3 or 4, wherein after receiving the short circuit current scanning request from different user terminals, the access controller further comprises the steps of:
the access controller verifies the user terminal according to the received short-circuit current scanning requests of different user terminals, judges whether the user terminal is a user terminal with access authority, and executes the step that the access controller calls corresponding network source data from a data storage according to the short-circuit current scanning requests if the user terminal has the access authority.
6. The short-circuit current scanning method of the power network according to claim 3 or 4, wherein the task scheduler obtains fault node information in the network to be scanned according to the received network source data and the network information to be scanned, generates a short-circuit current scanning task of a fault node, and maps the short-circuit current scanning task of the fault node to the server includes:
the task scheduler acquires fault node information in the network to be scanned according to the received network source data and the network information to be scanned;
and the task scheduler analyzes whether the complexity of the network to be scanned exceeds a set threshold value according to the received network information to be scanned, if not, a simplified short-circuit current scanning task of the fault node of the network to be scanned is generated, and the simplified short-circuit current scanning task is mapped into the server.
7. The method as claimed in claim 6, wherein the task scheduler, after analyzing whether the complexity of the network to be scanned exceeds a set threshold according to the received information of the network to be scanned, further comprises:
and if the complexity of the network to be scanned exceeds a set threshold value, calculating a node admittance matrix of nodes in the network to be scanned, performing LDU decomposition on the node admittance matrix, generating a node admittance matrix short-circuit current scanning task of each fault node, and mapping the node admittance matrix short-circuit current scanning task of each fault node into each thread of the server respectively.
8. The short-circuit current scanning method of the power network according to claim 6, wherein the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and the returning the short-circuit current scanning result to the corresponding user terminal includes:
if the received short-circuit current scanning task of the fault node is a simplified short-circuit current scanning task, performing planet-triangle transformation on the network to be scanned, eliminating other nodes except the fault node in the network to be scanned aiming at each fault node, obtaining an equivalent impedance of one port of the network to be scanned, taking the equivalent impedance as the short-circuit impedance of the fault node, obtaining a short-circuit current scanning result of the fault node in the network to be scanned, and returning the short-circuit current scanning result to a corresponding user terminal.
9. The short-circuit current scanning method of the power network according to claim 7, wherein the server processes the received short-circuit current scanning task of the fault node to obtain a short-circuit current scanning result, and returning the short-circuit current scanning result to the corresponding user terminal includes:
if the received short-circuit current scanning task of the fault node is a node admittance matrix short-circuit current scanning task, in each thread mapped with the node admittance matrix short-circuit current scanning task, calculating a point location vector of the fault node according to fault node information in the thread, and calculating a short-circuit impedance of the fault node according to the point location vector and the node admittance matrix decomposed by the LDU;
and returning the short-circuit impedance result of the fault node calculated in each thread to the corresponding user terminal.
10. A short-circuit current scanning method for an electric power network according to claim 9, characterized in that the point location vector of the fault node is calculated by the following formula:
b＝{…0i-1 1i 0i+1…}
in the formula, b is a point location vector, b has n items in total, n is the number of nodes in the network to be scanned, and i is the serial number of a fault node in n nodes;
the short circuit impedance of the fault node is calculated by solving the following formula:
in the above formula, Yn×nIs a node admittance matrix of the network to be scanned, (Y)n×n)LDUFor the node admittance matrix after LDU decomposition, n is the node number of the nodes in the network to be scanned, X is the set vector and XiIs the ith term, Z, in the X vectori,SCIs the short circuit current of the failed node.
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