A digital power substation construction method and device for a power system

Abstract

The application discloses a kind of digital power supply station construction method and equipment for power system, comprising: constructing basic framework;Based on tracing method, load partition is carried out to output power;Construct load partition function library;Create DataV visualization tool, and the function display board inside basic framework is visualized.Equipment includes: processor, processor includes selection module, construction module and detection module.The basic framework of the power system digital program constructed by the application can effectively shorten the system recovery time, based on the tracing method, the load partition is carried out to output power, and according to the construction of load partition function library, the basic framework of the perfect power system digital program is constructed, and then, the difficulty of solving large-scale mixed integer nonlinear programming problem is solved, and the correctness of the algorithm is improved through load partition and adjustment based on power flow tracking algorithm.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power systems, and relates to a power supply station construction method, in particular to a digital power supply station construction method and equipment for a power system. BACKGROUND

[0002] The traditional power system cannot cope with the challenges brought by high proportion of new energy, high proportion of power electronic devices and low system moment of inertia.

[0003] The existing power system framework is relatively simple and cannot meet the challenges brought by high proportion of power electronic devices and low system moment of inertia, and from the traditional framework structure, it is relatively simple, the correctness and timeliness are relatively low, and there is a relatively large limitation in the actual application scene.

[0004] Therefore, it is urgent to improve the construction method of the power system to solve the above problems. SUMMARY

[0005] The purpose of the application is to provide a digital power supply station construction method and equipment for a power system, which can effectively shorten the system recovery time, and based on the tracing method, the output power is divided into load partitions, and based on the construction of the load partition function library, a perfect basic framework of the power system digital program is constructed, and then the difficulty of solving the large-scale mixed integer nonlinear programming problem is solved, and the correctness of the algorithm is improved through the load partition and adjustment based on the power flow tracing algorithm.

[0006] In order to achieve the above purpose, the main technical scheme adopted by the application includes:

[0007] A digital power supply station construction method for a power system, comprising the following steps:

[0008] Step 1: constructing a basic framework of a power system digital program in advance, which can conveniently and quickly summarize and arrange the power system, greatly improving the convenience and practicality of the system;

[0009] Step 2: selecting the output power of at least one distributed power supply as a framework node of the basic framework, dividing the output power into load partitions based on the tracing method, constructing a perfect basic framework of the power system digital program, and dividing the output power into load partitions based on the tracing method, solving the difficulty of solving the large-scale mixed integer nonlinear programming problem;

[0010] Step 3: constructing a load partition function library to complete the load partition of the starting unit in the basic framework;

[0011] Step four: customizing the application template and operation function components, and storing the application template and operation function components in the cloud database, and embodying in the basic framework through the function panel, the function panel including picture browsing, positioning viewing, webpage browsing, data storage and short message pushing, convenient and fast to use, convenient to view and use, customizing the application template and operation function components, and storing the application template and operation function components in the cloud database, facilitating timely extraction, and improving the timeliness of the system;

[0012] Step five: creating a DataV visualization tool, visualizing the function panel inside the basic framework, and providing power templates and chart components, visualizing the function panel inside the basic framework, the above-mentioned application building method and system can generate corresponding application programs through obtaining pre-established application templates, configuration parameters and business function components, and can directly present on the function panel, saving the most time-consuming and cost-consuming links such as program design, program coding, simulation testing and real machine testing, and reducing the cost.

[0013] Through the above technical solutions, formulating a reasonable power system and constructing a basic framework of the power system digital program can effectively shorten the system recovery time, selecting the output power of at least one distributed power supply as a framework node of the basic framework, based on the tracing method, the output power is divided into load partitions, and a perfect basic framework of the power system digital program is constructed according to the construction of the load partition function library, and then, the difficulty of solving large-scale mixed integer nonlinear programming problem is solved, and the correctness of the algorithm is improved through load partitioning and adjustment based on the power flow tracing algorithm.

[0014] Preferably, the basic framework in step one includes framework nodes corresponding to a plurality of distributed power supplies, load partitions and function panels.

[0015] Preferably, the data of the cloud database is divided into business data and real-time data according to the data characteristics, and the data is screened and converted.

[0016] Preferably, the function panel in step four includes picture browsing, positioning viewing, webpage browsing, data storage and short message pushing.

[0017] Preferably, the DataV visualization tool in step five includes visualization of geographic information and business data of distributed power supplies, and provides power templates and chart components.

[0018] Preferably, the tracing method is an effective method for calculating the power supplied by different motors to a specific load, and the basic process is as follows:

[0019] The search of the directed path, from any generator node to any negative charge node, completes the path from any generator node to all generators, and from any load to all generator nodes.

[0020] The power supplied by any load from different generators is calculated, and the steps are as follows:

[0021] a) Generator node G i to load node L j There are P paths, and the power consumption of the Kth directed path is calculated by the following equation:

[0022]

[0023] wherein, P is the active power output of the generator G i to load node L j The power consumption of the kth directed path with m nodes, the first end of which is the generator node and the last end of which is the load node: P i，G is the active power output of the generator; P ki，Ki+1 is the line power between the ith node and the i+1th node on path k; P kj，in is the active power inflow of the ith node on path k; P km，l is the active load of the last node on path k.

[0024] Correspondingly, the active power consumption of the load node to the generator G i is:

[0025]

[0026] wherein, P is the power supplied by the generator G j to the load node L i in the total load demand.

[0027] b) According to the calculation process of step a), the power consumed by the load L j from the remaining generators G s (s = 1, 2, 3, … N g , s ≠ i) is calculated and is P Gs-Lj ;

[0028] c) Repeat steps a) and b) to obtain the power values consumed by all load partitions from all generators, respectively.

[0029] Preferably, based on the above tracing calculation process, the algorithm for dividing the load to be divided into each partition is as follows:

[0030] In normal circumstances, the power flow of the system is calculated once;

[0031] j=0; set

[0032] For the load L j , according to the above tracing method, the power P Gi-Lj (i=1,2,…,N g ) drawn from each unit is calculated.

[0033] According to the generators in each generator partition ng i , and P Gi-Lj (i=1,2,…,N g ), the power supplied by each partition to the load L j is calculated, and is recorded as:

[0034]

[0035] According to P ngi-Lj , the load L j is divided into the corresponding partition nli, that is, nli:=nli+{j};

[0036] j++; if j>N1, the load partitioning is finished.

[0037] Through the above technical scheme, the traditional power system framework is relatively simple and cannot meet the challenges brought by high proportion of power electronic equipment and low system moment of inertia, and from the traditional framework structure, it is relatively simple, production is unified, and there is great limitation in actual application scene. The load partitioning of the application based on the tracing method adjusts the boundary of the load partitioning, so that the constraint is satisfied while the objective function is minimized, greatly improving the effectiveness and correctness of the algorithm.

[0038] A digital power supply construction device for a power system, comprising: a processor comprising a selection module, a construction module and a detection module, the selection module is used for pre-customizing application templates and business function components, and storing the customized application templates and operation function components in a cloud database, the construction module is used for constructing a basic framework of a digital power system program, and the detection module is used for simulation testing and real machine testing. The digital power supply construction device for a power system can generate corresponding application programs by obtaining pre-established application templates, configuration parameters and business function components, thereby saving the time-consuming and cost-consuming links such as program design, simulation testing and real machine testing, reducing the cost, and greatly improving the convenience of use.

[0039] Preferably, the construction module includes a generation module and a publishing module. The generation module is used to generate a function display board according to the framework node. The publishing module is used to publish it on the DataV visualization tool after passing the test module. The DataV visualization tool includes an update module. The update module is used to update the function display board. The power system can be monitored in real time at any time without manual updating. It is highly user-friendly and greatly improves the convenience and efficiency of use.

[0040] The present invention has the following beneficial effects:

[0041] Building a basic framework for power system digitalization programs can effectively shorten system recovery time. Based on the tracing method, the output power is load partitioned. By building a load partitioning function library, a complete basic framework for power system digitalization programs is constructed. Furthermore, the difficulty of solving large mixed-integer nonlinear programming problems is solved. Through load partitioning and adjustment based on the power flow tracking algorithm, the correctness of the algorithm is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Fig. 1 is a flow chart of the method of the present invention;

[0043] Fig. 2 It is a structural schematic diagram of the present invention;

[0044] Fig. 3 It is a schematic diagram of the device principle structure of the present invention.

[0045] In the figure, 1-basic framework, 2-framework node, 3-load partition, 4-application template, 5-operation function component, 6-cloud database, 7-function display board, 701-business data, 702-real-time data, 8-DataV visualization tool, 9-processor, 10-selection module, 11-construction module, 12-detection module, 13-generation module, 14-release module, 15-update module. DETAILED DESCRIPTION

[0046] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0047] like Figs. 1-3 As shown, the method for constructing a digital power supply station for a power system provided in this embodiment includes the following steps:

[0048] Step one: pre-construct the basic framework 1 of the power system digitization program, the basic framework 1 includes a plurality of framework nodes 2 corresponding to distributed power sources, load partitions 3 and function panels 7, through the basic framework 1, the power system can be summarized and arranged quickly, greatly improving the convenience and practicality of the system;

[0049] Step two: select the output power of at least one distributed power source as the framework node 2 of the basic framework 1, based on the tracing method, the output power is partitioned 3, a perfect basic framework 1 of the power system digitization program is constructed, and based on the tracing method, the output power is partitioned 3, solving the difficulty of solving large-scale mixed integer nonlinear programming problems;

[0050] Step three: construct a load partition 3 function library to complete the load partition 3 of the starting unit in the basic framework 1;

[0051] Step four: customize application templates 4 and operation function components 5, and store the application templates 4 and operation function components 5 in the cloud database 6, the data of the cloud database 6 is divided into business data 701 and real-time data 702 according to the data characteristics, and the data is screened and converted, and is reflected in the basic framework 1 through the function panel 7, the function panel 7 includes picture browsing, positioning viewing, webpage browsing, data storage and SMS pushing, which is convenient and fast to use, and is convenient to view and use, the application templates 4 and operation function components 5 are customized and stored in the cloud database 6, which is convenient for timely extraction and improves the timeliness of the system;

[0052] Step five: create a DataV visualization tool 8, including: visualization of geographic information and business data 701 of distributed power sources, and provide power templates and chart components, visualize the function panel 7 in the basic framework 1, the above application construction method and system can generate corresponding application programs by obtaining pre-established application templates, configuration parameters and business function components, and can be directly presented on the function panel 7, saving the time-consuming and cost-consuming links of program design, program coding, simulation testing and real machine testing, reducing the cost.

[0053] Formulating a reasonable power system and constructing a basic framework 1 of the power system digitization program can effectively shorten the system recovery time, selecting the output power of at least one distributed power source as the framework node 2 of the basic framework 1, based on the tracing method, the output power is partitioned 3, and based on the construction of the load partition 3 function library, a perfect basic framework of the power system digitization program is constructed, and then the difficulty of solving large-scale mixed integer nonlinear programming problems is solved, and the correctness of the algorithm is improved through load partitioning and adjustment based on the power flow tracing algorithm.

[0054] The tracing method is an effective way to calculate the power supplied by different motors to a specific load. The basic process is as follows:

[0055] 1) Search for directed paths. Starting from any generator node, all paths to any negative charge node are searched. Accordingly, the paths from any generator node to all generators and from any load to all generator nodes are completed.

[0056] 2) Calculate the power supplied by different units to any load. The steps are as follows:

[0057] a) Generator node G i To load node L j There are P paths. The power drawn by the Kth directed path is given by the following equation:

[0058]

[0059] in, For the generator G i To load node L j The power extraction of the kth directed path consists of m nodes, the beginning of the path is the generator node, and the end is the load node: P i，G is the active power output of the generator; P ki，Ki+1 is the line power from the i-th node to the i+1-th node on path k; P kj，in is the active power inflow to the i-th node on path k; P km，l is the active load of the last node on path k.

[0060] Correspondingly, the load node is connected to the generator G i The active power absorbed is:

[0061]

[0062] in, is the load node L j The total load demand is from generator G i The power of the power supply.

[0063] b) According to the calculation process of step a), calculate L j From the remaining generator G s (s=1,2,3,…N g , s≠i) respectively draw power and count it as P Gs-Lj s=1,2,3,…N g ;s≠i;

[0064] c) Repeat steps a) and b) to obtain the power values ​​drawn by all loads from all generators.

[0065] Based on the above tracing calculation process, the algorithm for allocating the load to be distributed to each partition is as follows:

[0066] ⑦: Under normal circumstances, calculate the power flow of the system once;

[0067] ⑧: j = 0; set nl, i = 1, 2, ...,

[0068] ⑨: For load L j According to the above tracing method, the power P drawn from each unit is obtained. Gi-Lj (i=1, 2,…,N g );

[0069] ⑩: According to each generator partition ng i Generators in i=1, 2, ..., n, and P Gi-Lj (i=1,2,…,N g ), calculate the load L for each partition j The power supply is recorded as:

[0070]

[0071] 11: According to P ngi-Lj Load L j Divide into the corresponding partition nli, that is, nli:=nli+{j};

[0072] 12: j++; if j>N1, load partition 3 ends; otherwise, turn to ③.

[0073] The traditional power system framework is relatively simple and cannot meet the challenges brought by a high proportion of power electronic equipment and low system rotational inertia. In addition, from the perspective of traditional framework structure, it is relatively simple and uniform in production, which has relatively large limitations in actual application scenarios. The present invention is based on the load partition 3 of the tracing method, and adjusts the load partition 3 at the boundary so that the constraints are met while the objective function is minimized, greatly improving the effectiveness and correctness of the algorithm.

[0074] The utility model provides a kind of digital power supply construction equipment for electric power system, comprising: processor 9, processor 9 includes selection module 10, construction module 11 and detection module 12, selection module 10 is used to customize application template 4 and business function component in advance, and customized application template 4 and operating function component 5 are stored in cloud database 6, construction module 11 is used to construct the basic framework 1 of electric power system digital program, detection module 12 is used to carry out simulation test and real machine test, the digital power supply construction equipment of electric power system, by obtaining the application template, configuration parameter and business function component established in advance, corresponding application can be generated, the most time-consuming and cost-consuming links such as program design, simulation test and real machine test are saved, cost is reduced, and the convenience of use is greatly improved.

[0075] Construction module 11 includes generation module 13 and release module 14, generation module 13 is used to generate function display board 7 according to the framework node 2, release module 14 is used to release on DataV visualization tool 8 after test module 12, DataV visualization tool 8 includes update module 15, update module 15 is used to update function display board 7, without manually updating, real-time monitoring of electric power system can be carried out at any time, the degree of humanization is high, the convenience of use and the efficiency of use are greatly improved.

[0076] It should be noted that the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0077] The above description shows and describes several preferred embodiments of the present application, but as mentioned before, it should be understood that the present application is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, and can be used in various other combinations, modifications and environments, and can be modified by the above teaching or related art or knowledge within the scope of the inventive concept described herein. The modification and change made by the person skilled in the art without departing from the spirit and scope of the present application should be within the protection scope of the claims attached to the present application.

Claims

1. A method for constructing a digital power supply station for an electric power system, characterized in that: The following steps are involved: Step 1: Pre-build the basic framework of the power system digitalization program; Step 2: Select the output power of at least one distributed power source as the framework node of the basic framework, and perform load partitioning on the output power based on the tracing method; Step 3: Build a load partitioning function library and complete the load partitioning of the startup unit within the basic framework; Step 4: Customize application templates and operational function components, store them in the cloud database, and display them in the basic framework through functional display boards; Step 5: Create the DataV visualization tool to visualize the functional display panels within the basic framework; In step 2, the tracing method is an effective method for calculating the power supplied by different motors to a specific load. The process is as follows: 21) Search for directed paths, starting from any generator node, search for all paths to any negative charge node, and accordingly complete the path from any generator node to all generators, and the path from any load to all generator nodes; 22) Calculate the power supplied by different units to any load. The steps are as follows: a) Generator node G i To load node L j There are P paths. The power drawn by the Kth directed path is given by the following equation: in, For the generator G i To load node L j The power extraction of the kth directed path consists of m nodes, the beginning of the path is the generator node, and the end is the load node: P i，G is the active power output of the generator; P ki，Ki+1 is the line power from the i-th node to the i+1-th node on path k; P kj，in is the active power inflow to the i-th node on path k; P km，l is the active load of the last node on path k; Correspondingly, the load node is connected to the generator G i The active power absorbed is: in, is the load node L j The total load demand is from generator G i Power of the power supply; b) According to the calculation process of step a), calculate L j From the remaining generator G s (s=1,2,3,…N g , s≠i) respectively draw power and count it as P Gs-Lj (s=1,2,3,…N g ;s≠i); c) Repeat steps a) and b) to obtain the power values ​​drawn by all load partitions from the corresponding generators.

2. A method for constructing a digital power supply station for an electric power system according to claim 1, characterized in that: The basic framework in step 1 includes framework nodes, load partitions, and functional display panels corresponding to a number of distributed power sources.

3. The method for constructing a digital power supply station for an electric power system according to claim 1, characterized in that: Based on the above tracing calculation process, the algorithm for allocating the load to be distributed to each partition is as follows: ①: Under normal circumstances, calculate the power flow of the primary system; ②: j = 0; set nl, ③: For load L j According to the above tracing method, the power P drawn from each unit is obtained. Gi-Lj (i=1,2,…,N g ); ④: According to each generator partition ng i (i=1, 2, ..., n) generators, and P Gi-Lj (i=1,2,…,N g ), calculate the load L for each partition j The power supply is recorded as: ⑤: According to P ngi-Lj Load L j Divide into the corresponding partition nli, that is, nli:=nli+{j}; ⑥: j++; if j>N1, load partition (3) ends; otherwise, turn to ③.

4. The method for constructing a digital power supply station for an electric power system according to claim 1, characterized in that: In the step 4, the data in the cloud database is divided into business data and real-time data according to data characteristics, and the data is screened and converted; the functional display board includes picture browsing, location viewing, web browsing, data storage and SMS push.

5. The method for constructing a digital power supply station for an electric power system according to claim 1, characterized in that: The DataV visualization tool described in step five includes: visualization of geographical information and business data of distributed power sources, and provides power templates and chart components.

6. A digital power supply construction device for an electric power system, used to implement the method of claim 1, comprising: A processor (9), characterized in that the processor (9) includes a selection module (10), a construction module (11) and a detection module (12); The selection module (10) is used to pre-customize the application template (4) and the business function component, and store the customized application template (4) and the operation function component (5) in a cloud database (6); The building module (11) is used to build a basic framework (1) of a power system digitalization program; The detection module (12) is used for performing simulation testing and real machine testing.

7. The digital power supply station construction equipment for power system according to claim 6, characterized in that: The construction module (11) includes a generation module (13) and a publishing module (14); The generating module (13) is used to generate a functional display board (7) according to the frame node (2); The publishing module (14) is used to publish on the DataV visualization tool (8) after passing through the detection module (12).

8. The digital power supply station construction equipment for the power system according to claim 7, characterized in that: The DataV visualization tool (8) includes an updating module (15) for updating the function display board (7).

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