Model selection method and system for key equipment of flexible direct current power transmission system

Abstract

The invention discloses a model selection method and system for key equipment of a flexible direct-current power transmission system, and belongs to the technical field of flexible direct-current power transmission. The model selection method comprises the following steps: determining equipment parameters of key equipment of the flexible direct-current power transmission system, and compiling a calculation table according to the equipment parameters; associating the equipment parameters with the equipment models of the key equipment of the flexible direct current power transmission system in the calculation table; and determining a boundary condition of the flexible direct current power transmission system, and based on the boundary condition, selecting an equipment model suitable for the key equipment of the flexible direct current power transmission system from the model selection calculation table. According to the method, the equipment type selection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible direct current power transmission, and more specifically, to a method and system for selecting key equipment of a flexible direct current power transmission system. Background Art

[0002] The selection of equipment for flexible DC transmission system is one of the key technologies in engineering design and implementation. The reasonable selection of equipment is directly related to the cost, land occupation, engineering progress, safe operation of the system and other aspects of the converter station. The general principles for the selection of equipment for flexible DC transmission system are: the main parameters of the equipment are coordinated to meet the requirements of system operation and control protection; the design is compact under the premise of meeting technical conditions; the selection is as close to the conventional equipment sequence as possible.

[0003] Conventional engineering equipment selection is usually carried out separately after the equipment technical parameters are calculated. After the technicians get the parameters, they communicate with the manufacturer. If the manufacturer cannot meet the equipment technical requirements, they will return to adjust the parameters or change the manufacturer. This method is particularly dependent on the experience of the technicians, and the technology transplantation and inheritance cycle is long and difficult. Summary of the invention

[0004] In view of the above problems, the present invention proposes a method for selecting key equipment of a flexible direct current transmission system, comprising:

[0005] Determine the equipment parameters of key equipment of the flexible DC transmission system and prepare calculation tables based on the equipment parameters;

[0006] Associating the equipment parameters with equipment models of key equipment of the flexible DC power transmission system in the calculation table;

[0007] Determine the boundary conditions of the flexible direct current power transmission system, and based on the boundary conditions, select the equipment model suitable for the key equipment of the flexible direct current power transmission system in the selection calculation table.

[0008] Optionally, a tool for compiling a calculation table based on the device parameters includes: Microsoft Excel, Matlab or Visual C++.

[0009] Optionally, a calculation table is prepared according to the equipment parameters, including:

[0010] The equipment parameters are compiled into a calculation table according to the mutual coordination relationship between the equipment parameters and the relationship between the equipment parameters and the flexible direct current transmission system parameters.

[0011] Optionally, the method further includes: compiling a calculation program for calculating equipment parameters of key equipment of the flexible direct current power transmission system, and calculating the equipment parameters of the key equipment of the flexible direct current power transmission system through the calculation program.

[0012] Optional key equipment of the flexible DC transmission system includes: connecting transformer, converter valve components, valve reactor and grounding resistor.

[0013] Optionally, the method further includes: setting association conditions between device parameters and device models, and according to the association conditions, associating the device parameters with the device model in the calculation table.

[0014] Optionally, the method further comprises: establishing a database of key equipment suppliers and equipment models;

[0015] The database is used to retrieve supplier data and equipment model data.

[0016] Optionally, the calculation table retains a source program modification window, through which the calculation table is modified according to the updated data.

[0017] Optionally, the selected equipment models suitable for key equipment of the flexible direct current transmission system include one or more groups, all of which satisfy different constraints under boundary conditions.

[0018] Optionally, the boundary conditions are input into the calculation table as input content, and the device parameters in the calculation table are filtered out according to the input boundary conditions, that is, the device models associated with the device parameters are simultaneously filtered out.

[0019] On the other hand, the present invention also proposes a system for selecting key equipment of a flexible direct current transmission system, comprising:

[0020] A calculation table generating unit, used for determining equipment parameters of key equipment of the flexible DC power transmission system, and compiling a calculation table according to the equipment parameters;

[0021] An associating unit, configured to associate the equipment parameters with equipment models of key equipment of the flexible DC power transmission system in the calculation table;

[0022] The output unit is used to determine the boundary conditions of the flexible direct current power transmission system, and based on the boundary conditions, select the equipment model suitable for the key equipment of the flexible direct current power transmission system in the selection calculation table.

[0023] Optionally, a tool for compiling a calculation table based on the device parameters includes: Microsoft Excel, Matlab or Visual C++.

[0024] Optionally, a calculation table is prepared according to the equipment parameters, including:

[0025] The equipment parameters are compiled into a calculation table according to the mutual coordination relationship between the equipment parameters and the relationship between the equipment parameters and the flexible direct current transmission system parameters.

[0026] Optionally, the calculation table generating unit is further used to: compile a calculation program for calculating equipment parameters of key equipment of the flexible DC power transmission system, and calculate the equipment parameters of the key equipment of the flexible DC power transmission system through the calculation program.

[0027] Optional key equipment of the flexible DC transmission system includes: connecting transformer, converter valve components, valve reactor and grounding resistor.

[0028] Optionally, the association unit is further used to: set an association condition between the device parameter and the device model, and associate the device parameter with the device model in the calculation table according to the association condition.

[0029] Optionally, the calculation table generation unit is further used to: establish a database of key equipment suppliers and equipment models;

[0030] The database is used to retrieve supplier data and equipment model data.

[0031] Optionally, the calculation table retains a source program modification window, through which the calculation table is modified according to the updated data.

[0032] Optionally, the device models suitable for key equipment of the flexible direct current power transmission system selected by the output unit include one or more groups, all of which satisfy different constraints under boundary conditions.

[0033] Optionally, the calculation table generating unit is further used to: input the boundary conditions into the calculation table as input content of the calculation table, and filter out the device parameters in the calculation table according to the input boundary conditions, that is, simultaneously filter out the device models associated with the device parameters.

[0034] In yet another aspect, the present invention further provides a computing device, comprising: one or more processors;

[0035] a processor for executing one or more programs;

[0036] When the one or more programs are executed by the one or more processors, the above-described method is implemented.

[0037] In yet another aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed, the method described above is implemented.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention provides a method for selecting key equipment of a flexible direct current transmission system, comprising: determining equipment parameters of the key equipment of the flexible direct current transmission system, compiling a calculation table according to the equipment parameters; associating the equipment parameters with the equipment models of the key equipment of the flexible direct current transmission system in the calculation table; determining the boundary conditions of the flexible direct current transmission system, and selecting the equipment models suitable for the key equipment of the flexible direct current transmission system in the selection calculation table based on the boundary conditions. The present invention greatly improves the efficiency of equipment selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a flow chart of the method of the present invention;

[0041] Figure 2 It is the principle diagram of the method of the present invention;

[0042] Figure 3 It is a structural diagram of the system of the present invention. DETAILED DESCRIPTION

[0043] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0044] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0045] Embodiment 1:

[0046] As a new generation of DC transmission technology, Flexible DC transmission highlights three major technical features: fully controlled power electronic devices, voltage source converters and pulse modulation, and solves many inherent bottlenecks of conventional DC transmission technology: it can achieve independent control of active power and reactive power without reactive compensation; it can be used to power passive AC systems without the support of short-circuit current of the power grid; two stations can be controlled and operated independently without the need for inter-station communication; the voltage polarity remains unchanged when the power flow reverses, and dry cross-linked polyethylene DC cables can be used to reduce environmental pollution; it can achieve nearly sinusoidal AC output, with small filtering capacity, small footprint, and easy modularization.

[0047] Due to the above characteristics, flexible DC transmission technology is more suitable for wind power grid connection, island power supply, asynchronous interconnection of AC systems, distributed power grid connection, multi-terminal DC transmission and urban distribution network capacity expansion. However, there is no software for selecting key equipment of flexible DC transmission system suitable for engineering application in the currently published patents and literature.

[0048] Based on this, the present invention proposes a method for selecting key equipment for flexible DC transmission system, such as Figure 1 As shown, including:

[0049] Step 1: Determine the equipment parameters of key equipment of the flexible DC transmission system, and prepare a calculation table according to the equipment parameters;

[0050] Step 2: Associating the equipment parameters with equipment models of key equipment of the flexible DC power transmission system in the calculation table;

[0051] Step 3: Determine the boundary conditions of the flexible direct current power transmission system, and based on the boundary conditions, select the equipment models suitable for the key equipment of the flexible direct current power transmission system in the selection calculation table.

[0052] Wherein, the compilation tool for compiling the calculation table according to the equipment parameters includes: Microsoft Excel, Matlab or Visual C++.

[0053] Wherein, a calculation table is prepared according to the equipment parameters, including:

[0054] The equipment parameters are compiled into a calculation table according to the mutual coordination relationship between the equipment parameters and the relationship between the equipment parameters and the flexible direct current transmission system parameters.

[0055] The method further comprises: compiling a calculation program for calculating equipment parameters of key equipment of the flexible direct current power transmission system, and calculating the equipment parameters of the key equipment of the flexible direct current power transmission system through the calculation program.

[0056] Among them, the key equipment of the flexible DC transmission system includes: connecting transformer, converter valve components, valve reactor and grounding resistor.

[0057] The method further includes: setting association conditions between device parameters and device models, and according to the association conditions, associating the device parameters with the device model in the calculation table.

[0058] Among other things, the method also includes: establishing a database of key equipment suppliers and equipment models;

[0059] The database is used to retrieve supplier data and equipment model data.

[0060] The calculation table retains a source program modification window, through which the calculation table is modified according to the updated data.

[0061] Among them, the equipment models selected for key equipment of the flexible direct current transmission system include one or more groups, all of which meet different constraints under boundary conditions.

[0062] The boundary conditions are used as input content of the calculation table, and are input into the calculation table. According to the input boundary conditions, the device parameters in the calculation table are screened out, that is, the device models associated with the device parameters are simultaneously screened out.

[0063] The present invention is further described below in conjunction with specific implementation cases:

[0064] Implementation principle Figure 2 As shown, the specific implementation process includes:

[0065] The main circuit equipment parameters are compiled into a calculation table according to their mutual coordination relationship and the relationship with the system parameters. The programming tools can be Microsoft Excel, Matlab, Visual C++, etc. Then the equipment parameters are associated with the corresponding equipment models. The equipment models are continuously updated and supplemented with the accumulation of engineering experience. Using this calculation table, you only need to enter the boundary conditions of the flexible DC system to obtain one or several groups of equipment models that meet different constraints. The associated calculation parameter table retains the source program modification window so that it can be improved according to actual engineering experience.

[0066] The implementation method of the quick selection association calculation table is as follows:

[0067] (1) Prepare the technical parameter calculation program for the main equipment of the flexible DC system, including the connecting transformer, converter valve components, valve reactor, grounding resistor, etc.;

[0068] (2) Setting the association conditions between equipment technical parameters and equipment models;

[0069] (3) The human-machine interface is in the form of a table, and the table content includes the input boundary conditions, all equipment technical parameters, and the optional equipment models and manufacturers;

[0070] (4) Establish a database of equipment models;

[0071] (5) Set the association conditions between equipment models and suppliers;

[0072] (6) Establish a supplier database;

[0073] (7) Both the source code and database are open to facilitate continuous modification and improvement by technical personnel.

[0074] The advantages of the present invention are as follows:

[0075] It greatly improves the efficiency of system design and equipment selection; avoids excessive interference from human factors; provides a platform for preserving and accumulating the experience of engineering designers; and is open.

[0076] Embodiment 2:

[0077] The present invention also proposes a selection system 200 for key equipment of a flexible DC transmission system, such as Figure 3 As shown, including:

[0078] A calculation table generating unit 201 is used to determine the equipment parameters of key equipment of the flexible DC power transmission system and compile a calculation table according to the equipment parameters;

[0079] An associating unit 202 is used to associate the device parameters with the device models of the key devices of the flexible DC power transmission system in the calculation table;

[0080] The output unit 203 is used to determine the boundary conditions of the flexible DC power transmission system, and based on the boundary conditions, select the device model suitable for the key equipment of the flexible DC power transmission system in the selection calculation table.

[0081] Wherein, the compilation tool for compiling the calculation table according to the equipment parameters includes: Microsoft Excel, Matlab or Visual C++.

[0082] Wherein, a calculation table is prepared according to the equipment parameters, including:

[0083] The equipment parameters are compiled into a calculation table according to the mutual coordination relationship between the equipment parameters and the relationship between the equipment parameters and the flexible direct current transmission system parameters.

[0084] The calculation table generating unit 203 is further used to compile a calculation program for calculating equipment parameters of key equipment of the flexible DC power transmission system, and calculate the equipment parameters of the key equipment of the flexible DC power transmission system through the calculation program.

[0085] Among them, the key equipment of the flexible DC transmission system includes: connecting transformer, converter valve components, valve reactor and grounding resistor.

[0086] The associating unit 202 is further used to: set an associating condition between the device parameter and the device model, and associate the device parameter with the device model in the calculation table according to the associating condition.

[0087] The calculation table generation unit 203 is also used to: establish a database of key equipment suppliers and equipment models;

[0088] The database is used to retrieve supplier data and equipment model data.

[0089] The calculation table retains a source program modification window, through which the calculation table is modified according to the updated data.

[0090] The device models suitable for key devices of the flexible DC power transmission system selected by the output unit 203 include one or more groups, all of which meet different constraints under boundary conditions.

[0091] The calculation table generating unit 201 is further used to: input the boundary conditions as the input content of the calculation table into the calculation table, and filter out the device parameters in the calculation table according to the input boundary conditions, that is, to simultaneously filter out the device models associated with the device parameters.

[0092] The present invention greatly improves the efficiency of equipment selection.

[0093] Embodiment 3:

[0094] Based on the same inventive concept, the present invention also provides a computer device, which includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of the method in the above embodiment.

[0095] Embodiment 4:

[0096] Based on the same inventive concept, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both a built-in storage medium in a computer device and an extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the steps of the method in the above embodiment.

[0097] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0098] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0099] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0100] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0101] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0102] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for selecting key equipment for a flexible direct current transmission system, characterized in that: include: Determine the equipment parameters of key equipment of the flexible DC transmission system and prepare calculation tables based on the equipment parameters; Associating the equipment parameters with equipment models of key equipment of the flexible DC power transmission system in the calculation table; Determine the boundary conditions of the flexible direct current power transmission system, and based on the boundary conditions, select the equipment model suitable for the key equipment of the flexible direct current power transmission system in the selection calculation table.

2. The selection method according to claim 1, characterized in that: The tool for compiling the calculation table according to the device parameters includes: Microsoft Excel, Matlab or Visual C++.

3. The selection method according to claim 1, characterized in that: The step of compiling a calculation table according to the equipment parameters comprises: The equipment parameters are compiled into a calculation table according to the mutual coordination relationship between the equipment parameters and the relationship between the equipment parameters and the flexible direct current transmission system parameters.

4. The selection method according to claim 1, characterized in that: The method further comprises: compiling a calculation program for calculating equipment parameters of key equipment of the flexible direct current power transmission system, and calculating the equipment parameters of the key equipment of the flexible direct current power transmission system through the calculation program.

5. The selection method according to claim 1, characterized in that: The key equipment of the flexible direct current transmission system includes: a connecting transformer, various components of a converter valve, a valve reactor and a grounding resistor.

6. The selection method according to claim 1, characterized in that: The method further includes: setting association conditions between device parameters and device models, and according to the association conditions, associating the device parameters with the device models in the calculation table.

7. The selection method according to claim 1, characterized in that: The method further includes: establishing a database of key equipment suppliers and equipment models; The database is used to retrieve supplier data and equipment model data.

8. The selection method according to claim 1, characterized in that: The calculation table retains a source program modification window, through which the calculation table is modified according to the updated data.

9. The selection method according to claim 1, characterized in that: The selected equipment models suitable for key equipment of the flexible direct current transmission system include one or more groups, all of which meet different constraints under boundary conditions.

10. The selection method according to claim 1, characterized in that: The boundary conditions are used as input content of the calculation table, and are input into the calculation table. According to the input boundary conditions, the device parameters in the calculation table are filtered out, that is, the device models associated with the device parameters are simultaneously filtered out.

11. A selection system for key equipment of a flexible direct current transmission system, characterized in that: include: A calculation table generating unit, used for determining equipment parameters of key equipment of the flexible DC power transmission system, and compiling a calculation table according to the equipment parameters; An associating unit, configured to associate the equipment parameters with equipment models of key equipment of the flexible DC power transmission system in the calculation table; The output unit is used to determine the boundary conditions of the flexible direct current power transmission system, and based on the boundary conditions, select the equipment model suitable for the key equipment of the flexible direct current power transmission system in the selection calculation table.

12. The selection system according to claim 11, characterized in that: The tool for compiling the calculation table according to the device parameters includes: Microsoft Excel, Matlab or Visual C++.

13. The selection system according to claim 11, characterized in that: The step of compiling a calculation table according to the equipment parameters comprises: The equipment parameters are compiled into a calculation table according to the mutual coordination relationship between the equipment parameters and the relationship between the equipment parameters and the flexible direct current transmission system parameters.

14. The selection system according to claim 11, characterized in that: The calculation table generating unit is further used to compile a calculation program for calculating equipment parameters of key equipment of the flexible DC power transmission system, and calculate the equipment parameters of the key equipment of the flexible DC power transmission system through the calculation program.

15. The selection system according to claim 11, characterized in that: The key equipment of the flexible direct current transmission system includes: a connecting transformer, various components of a converter valve, a valve reactor and a grounding resistor.

16. The selection system according to claim 11, characterized in that: The association unit is further used to: set an association condition between the device parameter and the device model, and associate the device parameter with the device model in the calculation table according to the association condition.

17. The selection system according to claim 11, characterized in that: The calculation table generating unit is also used to: establish a database of key equipment suppliers and equipment models; The database is used to retrieve supplier data and equipment model data.

18. The selection system according to claim 11, characterized in that: The calculation table retains a source program modification window, through which the calculation table is modified according to the updated data.

19. The selection system according to claim 11, characterized in that: The device models suitable for key equipment of the flexible direct current power transmission system selected by the output unit include one or more groups, all of which meet different constraints under boundary conditions.

20. The selection system according to claim 11, characterized in that: The calculation table generating unit is further used to: input the boundary conditions as input content of the calculation table into the calculation table, and filter out the device parameters in the calculation table according to the input boundary conditions, that is, to simultaneously filter out the device models associated with the device parameters.

21. A computer device, characterized in that: include: one or more processors; a processor for executing one or more programs; When the one or more programs are executed by the one or more processors, the method according to any one of claims 1 to 10 is implemented.

22. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed, the method according to any one of claims 1 to 10 is implemented.

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