CN109768542B - Inheritance method and system for large-scale power grid electromagnetic transient automatic modeling - Google Patents
Inheritance method and system for large-scale power grid electromagnetic transient automatic modeling Download PDFInfo
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- CN109768542B CN109768542B CN201811532985.7A CN201811532985A CN109768542B CN 109768542 B CN109768542 B CN 109768542B CN 201811532985 A CN201811532985 A CN 201811532985A CN 109768542 B CN109768542 B CN 109768542B
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Abstract
The invention discloses a succession method and a succession system for electromagnetic transient automatic modeling of a large-scale power grid, and belongs to the technical field of large-scale power grids. The method comprises the following steps: acquiring historical work information of large-scale power grid electromagnetic transient automatic modeling, and determining reusable historical work; determining a storage structure of an inheritance object of the large-scale power grid electromagnetic transient automatic modeling; determining a large-scale power grid element inheritance object difference information table; carrying out inheritance operation on the public part of the historical work information of the reusable work; the difference portion is modified according to the difference information table. According to the invention, for different operation mode data of the same regional power grid, only initial subsystem division, power grid decoupling and other operations are required during first work, and then when other operation mode data of the regional power grid are automatically modeled, manual operation can be greatly reduced and work efficiency is improved by inheriting historical work.
Description
Technical Field
The invention relates to the technical field of large-scale power grids, in particular to an inheritance method and an inheritance system for electromagnetic transient automatic modeling of a large-scale power grid.
Background
With the rapid development and progress of economic society in China, energy safety, climate change and sustainable development become important strategic problems of economic society development in China. In order to adapt to the development of the economic society, in recent years, the rapid development of the extra-high voltage power grid is continuously promoted by national power grid companies, so that the main grid frame of the national power grid presents the remarkable characteristic of alternating current-direct current hybrid connection.
Electromagnetic transient simulation is a technical means which can accurately simulate the running characteristics of an alternating current-direct current power grid, but for the electromagnetic transient simulation of a large-scale alternating current-direct current power grid, the establishment of a simulation model is a difficult task. The traditional manual modeling mode consumes more personnel, has long time, is complex in process, has large workload and is easy to make mistakes. For a typical regional grid simulation project, the modeling work accounts for about 60% to 80% of the entire project work, and the modeling of the generator and its controller is a very important work.
In order to improve the working efficiency of electromagnetic transient simulation analysis, it is necessary to develop an automatic modeling tool. For the electromagnetic transient automatic modeling of a large-scale power grid, active participation of a user is usually provided so as to improve conversion efficiency and provide an auxiliary function for real-time simulation. In the design of the automatic generation method of the electromagnetic transient state of the large-scale power grid, active participation of users can comprise subsystem division, power grid decoupling and the like, wherein the subsystem division is used for dividing one large power grid into a plurality of smaller blocks so as to improve the generation efficiency of model topology and provide a platform for multi-user cooperation; and the power grid decoupling is realized by the user through selecting the type of the line according to the structure of the power grid so as to realize the parallel computation of the electromagnetic transient model. Active participation of users is a main part of manpower consumption in large-scale power grid electromagnetic transient automatic modeling work.
For different operation mode data of the power grid in the same area, most of information such as subsystem division, power grid decoupling and the like can be repeatedly utilized due to the fact that the structure of the power grid is not changed greatly.
Disclosure of Invention
Aiming at the problems, the invention provides a succession method for large-scale power grid electromagnetic transient automatic modeling, which comprises the following steps:
acquiring historical work information of large-scale power grid electromagnetic transient automatic modeling, and determining reusable historical work;
determining a storage structure of an inherited object of the large-scale power grid electromagnetic transient automatic modeling;
determining a large-scale power grid element inheritance object difference information table;
carrying out inheritance operation on the public part of the historical work information of the reusable work;
the difference portion is modified according to the difference information table.
Optionally, the reusable historical work includes: subsystem partitioning, line type modification and user configuration parameters.
Optionally, the storage structure is in text or table form.
Optionally, the difference information table provides information about missing and adding of large-scale power grid elements.
The invention also provides a inheritance system for large-scale power grid electromagnetic transient automatic modeling, which comprises:
the information acquisition module is used for acquiring historical work information of large-scale power grid electromagnetic transient automatic modeling and determining reusable historical work;
the structure determination module is used for determining a storage structure of an inheritance object of the large-scale power grid electromagnetic transient automatic modeling;
the generation information module is used for determining a large-scale power grid element inheritance object difference information table;
the inheritance module is used for inheriting the public part of the historical work information of the reusable work;
and the modification module modifies the difference part according to the difference information table.
According to the invention, for different operation mode data of the same regional power grid, only initial subsystem division, power grid decoupling and other operations are required during first work, and then when other operation mode data of the regional power grid are automatically modeled, manual operation can be greatly reduced and work efficiency is improved by inheriting historical work.
The invention provides the difference information table for different operation mode data of the power grid in the same area during inheritance, thereby facilitating the user to master the change of the power grid, facilitating the subsequent processing and improving the working efficiency.
Drawings
FIG. 1 is a flow chart of an inheritance method for large-scale power grid electromagnetic transient automatic modeling;
FIG. 2 is a diagram of a legacy system architecture for large-scale grid electromagnetic transient automatic modeling.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides a inheritance method for large-scale power grid electromagnetic transient automatic modeling, which comprises the following steps of:
historical work information of large-scale power grid electromagnetic transient automatic modeling is obtained, and reusable historical work is determined; inheritance operation must explicitly possess historical work of inherited value. The historical work with inherited values should have the following characteristics: the time consumption of the first operation is large; the operation information can be digitalized; most of the operational information is available in the new project.
The method comprises the following steps: subsystem division: subsystem division is used for dividing a large power grid into a plurality of smaller blocks so as to improve the generation efficiency of model topology and provide a platform for multi-user cooperation.
For data of a regional power grid, subsystem division of the power grid has certain stability. The sub-system division is usually performed according to the geographical position of a province or a region, and for different power grid operation modes of a power grid in the same region, the sub-system division does not change greatly due to the fact that the power grid structure does not change greatly.
Decoupling a power grid: and the power grid decoupling is realized by selecting part of power transmission lines by a user according to the power grid structure, changing the line type of the power transmission lines in the electromagnetic transient model and realizing the decoupling of the power grid in the electromagnetic transient model so as to realize the parallel calculation of the electromagnetic transient model.
For data of a regional power grid, the power grid decoupling operation has certain stability. For different power grid operation modes of power grids in the same region, the power grid structure is not changed greatly, so that the power transmission line meeting the decoupling requirement and the type of the power transmission line do not change greatly.
The two operations are the main parts of manpower consumption in the large-scale power grid electromagnetic transient automatic modeling, and have higher reusability for different operation modes of the power grid in the same region, so that the subsystem division and the power grid decoupling can be incorporated into a inheritance object.
Determining a storage structure of an inheritance object of the large-scale power grid electromagnetic transient automatic modeling, wherein the storage structure adopts a text or table form, for the subsystem division work, the selected element set of each subsystem in the historical work can be recorded and stored as the text or table form for inheritance operation.
For the power grid decoupling work, each modified line name and line type in the historical work can be recorded and saved in a text or table form for inheritance operation.
And determining a large-scale power grid element inheritance object difference information table, wherein the difference information table provides information for missing and adding of the large-scale power grid element. For subsystem partitioning work: and for the power grid elements existing in the new engineering power grid data and the inherited power grid data, performing subsystem division according to the inherited information.
For the grid decoupling operation: and for the transmission lines existing in both the new engineering power grid data and the inherited power grid data, setting the line type according to the inherited information.
Carrying out inheritance operation on the public part of the historical work information of the reusable work;
modifying the difference part according to the difference information table;
for subsystem partitioning work: and carrying out subsystem division on newly added power grid elements in the inherited power grid data of the new engineering power grid data.
For the grid decoupling operation: and correcting the line type of the relevant part by the user according to the power grid structure change information given in the difference information table.
The invention further provides an inheritance system 200 for large-scale power grid electromagnetic transient automatic modeling, as shown in fig. 2, the system 200 includes:
the information acquisition module 201 is used for acquiring historical work information of large-scale power grid electromagnetic transient automatic modeling and determining reusable historical work;
the structure determination module 202 is used for determining a storage structure of an inheritance object of the large-scale power grid electromagnetic transient automatic modeling;
the information generation module 203 is used for determining a large-scale power grid element inheritance object difference information table;
an inheritance module 204, which inherits the common part of the historical work information of the reusable work;
and a modification module 205 for modifying the difference part according to the difference information table.
According to the method, for different operation mode data of the power grid in the same area, initial operations such as subsystem division, power grid decoupling and the like are required only during first-time work, and then when automatic modeling is performed on other operation mode data of the power grid in the area, manual operation can be greatly reduced by inheriting historical work, and the work efficiency is improved.
The invention provides the difference information table for different operation mode data of the power grid in the same area during inheritance, thereby facilitating the user to master the change of the power grid, facilitating the subsequent processing and improving the working efficiency.
Claims (2)
1. An inheritance method for large-scale power grid electromagnetic transient automatic modeling, the method comprising:
acquiring historical work information of large-scale power grid electromagnetic transient automatic modeling, and determining reusable historical work, wherein the reusable historical work comprises the following steps: the system comprises subsystem division, line type modification and user configuration parameters, wherein the subsystem division is used for dividing a large-scale power grid into a plurality of smaller blocks;
determining a storage structure of an inheritance object of the large-scale power grid electromagnetic transient automatic modeling, wherein the storage structure adopts a text or table form, records an element set selected by each subsystem in historical work for the subsystem division work, and stores the element set in the text or table form for inheritance operation;
determining a large-scale power grid element inheritance object difference information table, wherein the difference information table provides information for missing and adding of large-scale power grid elements;
carrying out inheritance operation on the public part of the historical work information of the reusable historical work;
the difference portion is modified according to the difference information table.
2. An inheritance system applied with the inheritance method for large-scale power grid electromagnetic transient automatic modeling according to claim 1, wherein the system comprises:
the information acquisition module is used for acquiring historical work information of large-scale power grid electromagnetic transient automatic modeling and determining reusable historical work;
the structure determining module is used for determining a storage structure of inherited object information of the large-scale power grid electromagnetic transient automatic modeling;
the generation information module is used for determining a large-scale power grid element inheritance object difference information table;
the inheritance module is used for carrying out inheritance operation on the public part of the historical work information of the reusable historical work;
and the modification module modifies the difference part according to the difference information table.
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| CN103294878A (en) * | 2012-02-26 | 2013-09-11 | 杭州市电力局 | Unified modeling method of multidimensional grid models based on DMS (database management system) |
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