CN115982974A - Simulation analysis method and device based on RTDS large power grid equivalent model - Google Patents
Simulation analysis method and device based on RTDS large power grid equivalent model Download PDFInfo
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Abstract
The application discloses a simulation analysis method and a simulation analysis device based on an RTDS large power grid equivalent model, wherein the method comprises the following steps: determining a power transmission section of the grid, and acquiring a section inner boundary site list and a section outer boundary site list of the power transmission section; acquiring a next-stage station of a line connected with each station in the cross section inner boundary station list, and determining a difference station list according to the relationship between the next-stage station and the cross section outer boundary station list and the station list to be built; acquiring a next-stage station of a transformer connected with each station in the cross section inner boundary station list, and determining a difference station list according to the voltage grade relation between the next-stage station and a station to be modeled and the relation between the next-stage station and the cross section outer boundary station list and the station to be modeled; and taking the sites in the difference site list as the sites to be modeled, and performing power grid simulation modeling. Therefore, under the condition of high-proportion new energy infiltration at the present stage, the modeling efficiency and the accuracy of simulation analysis are greatly improved.
Description
Technical Field
The application relates to the technical field of power simulation analysis, in particular to a simulation analysis method and device based on an RTDS large power grid equivalent model.
Background
With the rapid development of large AC/DC hybrid power grids and the penetration of new energy with a high proportion of vigorous development, full electromagnetic transient modeling and simulation analysis are carried out on large-scale AC/DC hybrid power grids, which become necessary requirements for power grid development. However, the electromagnetic transient simulation calculation amount is huge, so that the simulation efficiency is reduced, and the application of the electromagnetic transient simulation calculation amount to a practical large power grid is further restricted.
Although a Real Time Digital Simulator (RTDS) fully utilizes a large-scale parallel computing technology and is a currently recognized high-efficiency electromagnetic transient simulation device, in practical application, before an RTDS experiment is performed, a model related to simulation analysis needs to be manually modeled, and if modeling of a plurality of provincial nets is involved, great efforts of simulation personnel are consumed to complete the modeling.
Disclosure of Invention
The application provides a simulation analysis method and device based on an RTDS large power grid equivalent model, which are used for reducing establishment and simulation analysis of the large power grid equivalent model on an RTDS platform and greatly improving modeling efficiency and simulation analysis accuracy under the condition of high-proportion new energy infiltration at the present stage.
In view of this, a first aspect of the present application provides a simulation analysis method based on an RTDS large power grid equivalent model, where the method includes:
determining a power transmission section of the grid, and acquiring a section inner boundary site list and a section outer boundary site list of the power transmission section;
acquiring a next-stage station of a line connected with each station in the cross section inner boundary station list, and determining a difference station list according to the relationship between the next-stage station and the cross section outer boundary station list and a station list to be built;
acquiring a next-stage station of the transformer connected with each station in the cross section inner boundary station list, and determining a difference station list according to the voltage grade relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the cross section outer boundary station list and the station to be modeled;
and taking the sites in the difference site list as the sites to be modeled, and carrying out power grid simulation modeling.
Optionally, the acquiring a next station of a line connected to each station in the intra-section boundary station list, and determining a difference station list according to a relationship between the next station and the intra-section boundary station list and the to-be-created station list specifically include:
s21, acquiring a next-stage site of a line connected with the ith site in the cross section inner boundary site list, wherein the next-stage site is not in the cross section outer boundary site list and is not in a to-be-built site list, and taking the next-stage site as a difference site;
and S22, enabling i +1= i, returning to the step S21 until all the sites in the boundary site list in the cross section are traversed, and obtaining a difference site list.
Optionally, the obtaining a next station of the transformer connected to each station in the list of station boundaries in the section determines the list of station differences according to a voltage level relationship between the next station and the station to be modeled, and a relationship between the next station and the list of station boundaries in the section and the list of station to be modeled, and specifically includes:
s31, acquiring a next-level site of a line connected with the ith site in the boundary site list in the section, and when the voltage level of the first next-level site is smaller than that of the site to be modeled, performing voltage level analysis on the second next-level site;
s32, if the next-stage station is not in the cross section outer boundary station list and is not in the to-be-built station list, taking the next-stage station as a difference station;
and S33, enabling i +1= i, returning to the step S31 until all the stations in the boundary station list in the section are traversed, and obtaining a difference station list.
Optionally, the acquiring a next station of a line connected to each station in the boundary station list in the section, and the acquiring a next station of a transformer connected to each station in the boundary station list in the section, before further include:
and judging whether the station does not exist in the station list of the inner boundary of the section, and whether the station list of the outer boundary of the section contains a certain station in a plurality of stations of the next stage, if so, finishing the algorithm.
The second aspect of the present application provides a simulation analysis system based on an RTDS large power grid equivalent model, the system includes:
the acquisition unit is used for determining a power transmission section of the grid frame and acquiring a section inner boundary site list and a section outer boundary site list of the power transmission section;
the first analysis unit is used for acquiring a next-stage station of a line connected with each station in the cross section inner boundary station list and determining a difference station list according to the relationship between the next-stage station and the cross section outer boundary station list and the station list to be built;
the second analysis unit is used for acquiring a next-stage station of the transformer connected with each station in the cross section inner boundary station list, and determining a difference station list according to the voltage grade relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the cross section outer boundary station list and the station to be modeled;
and the modeling unit is used for taking the station in the difference station list as a station to be modeled and carrying out power grid simulation modeling.
Optionally, the first analysis unit is specifically configured to:
s21, acquiring a next-stage site of a line connected with the ith site in the cross section inner boundary site list, wherein the next-stage site is not in the cross section outer boundary site list and is not in a to-be-built site list, and taking the next-stage site as a difference site;
and S22, enabling i +1= i, returning to the step S21 until all the stations in the boundary station list in the section are traversed, and obtaining a difference station list.
Optionally, the first analysis unit is specifically configured to:
s31, acquiring a next-level site of a line connected with the ith site in the boundary site list in the section, and when the voltage level of the first next-level site is smaller than that of the site to be modeled, performing voltage level analysis on the second next-level site;
s32, if the next-stage station is not in the list of the outer boundary station of the section and is not in the list of the stations to be built, the next-stage station is taken as a difference station;
and S33, enabling i +1= i, returning to the step S31 until all the stations in the boundary station list in the section are traversed, and obtaining a difference station list.
Optionally, the method further comprises: a judgment unit;
and the judging unit is used for judging whether a station does not exist in the cross section inner boundary station list or not, and whether the cross section outer boundary station list contains a certain station in a plurality of next-stage stations or not, if so, the algorithm is ended.
The third aspect of the application provides simulation analysis equipment based on an RTDS large power grid equivalent model, and the equipment comprises a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the steps of the simulation analysis method based on the RTDS large power grid equivalence model according to the first aspect.
A fourth aspect of the present application provides a computer-readable storage medium for storing program codes for executing the simulation analysis method based on the RTDS large power grid equivalence model according to the first aspect.
According to the technical scheme, the method has the following advantages:
the application provides a simulation analysis method based on an RTDS large power grid equivalent model, which comprises the following steps: determining a power transmission section of the grid, and acquiring a section inner boundary site list and a section outer boundary site list of the power transmission section; acquiring a next-stage station of a line connected with each station in the cross section inner boundary station list, and determining a difference station list according to the relationship between the next-stage station and the cross section outer boundary station list and the station list to be built; acquiring a next-stage station of a transformer connected with each station in the cross section inner boundary station list, and determining a difference station list according to the voltage grade relation between the next-stage station and a station to be modeled and the relation between the next-stage station and the cross section outer boundary station list and the station to be modeled; and taking the sites in the difference site list as the sites to be modeled, and performing power grid simulation modeling.
Because the simulation personnel can easily obtain the site list of the boundary in the section and the site list of the boundary outside the section according to the range of the test sites, the simulation analysis method has low working requirement on the simulation personnel, and reduces the modeling threshold of a large power grid on the RTDS. Therefore, under the condition of high-proportion new energy infiltration at the present stage, the modeling efficiency and the accuracy of simulation analysis are greatly improved.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of a simulation analysis method based on an RTDS large power grid equivalent model provided in an embodiment of the present application;
FIG. 2 is a schematic illustration of a power transmission section provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of an embodiment of a simulation analysis system based on an RTDS large power grid equivalent model provided in the embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Referring to fig. 1, a simulation analysis method based on an RTDS large power grid equivalent model provided in an embodiment of the present application includes:
it should be noted that a suitable power transmission section is selected from the grid frame, an inner boundary site list and an outer boundary site list of the section of the power transmission section are obtained, and the inner boundary site list of the section is put into a queue.
102, acquiring a next-level station of a line connected with each station in the cross section inner boundary station list, and determining a difference station list according to the relationship between the next-level station and the cross section outer boundary station list and a station list to be built;
specifically, the method comprises the following steps:
the nth (n =1,2, ...) batch site list BUS b is taken from the queue and this batch list is traversed, each site called BUS bi performing the following operations:
A. the next multiple sites are found through multiple lines connected by BUS bi:
1) And if the next-level multiple sites are not in the site list at the outer boundary of the section and are not placed in the site list to be modeled before, placing the next-level multiple sites into a difference site list.
Further, the method comprises the following steps:
2) If the cross section inner boundary site list does not contain BUS bi and the cross section outer boundary site list contains a certain site in the next-level multiple sites, the simulation personnel gives the cross section inner boundary site list and the cross section outer boundary site list, a closed area cannot be formed on the current power grid topology, and the algorithm is finished.
103, acquiring a next-stage station of the transformer connected with each station in the station list of the boundary in the section, and determining a difference station list according to the voltage level relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the station list of the boundary of the section and the station list to be modeled;
specifically, the method comprises the following steps:
B. the next stage of multiple stations are found by multiple transformers connected by BUS bi,
1) If the voltage grade of the next-stage station is smaller than the voltage grade of the current simulation model to be modeled, skipping;
2) And if the next-level multiple sites are not in the site list at the outer boundary of the section and are not placed in the site list to be modeled before, placing the next-level multiple sites into a difference site list.
Further, the method comprises the following steps:
3) If the cross section inner boundary site list does not contain BUS bi and the cross section outer boundary site list contains a certain site in the next-level multiple sites, the simulation personnel gives the cross section inner boundary site list and the cross section outer boundary site list, a closed area cannot be formed on the current power grid topology, and the algorithm is finished.
And step 104, taking the sites in the difference site list as the sites to be modeled, and performing power grid simulation modeling.
And finally, taking the difference station list as the next station list to be placed in a queue, placing all stations in the difference station list into a station list to be modeled, and emptying the difference station list. When the algorithm is normal, the simulation personnel gives the list of the station of the inner boundary of the section and the list of the station of the outer boundary of the section to form a closed area on the current power grid topology, and the station in the list of the station to be modeled can be modeled.
The above is one provided in the embodiments of the present application, and the following is one provided in the embodiments of the present application.
Referring to fig. 2, a simulation analysis system based on an RTDS large power grid equivalent model provided in an embodiment of the present application includes:
an obtaining unit 201, configured to determine a power transmission cross section of the grid, and obtain a cross-section inner boundary site list and a cross-section outer boundary site list of the power transmission cross section;
a first analyzing unit 202, configured to obtain a next-stage station of a line connected to each station in the cross-section inner-boundary station list, and determine a difference station list according to a relationship between the next-stage station and the cross-section outer-boundary station list and the to-be-created station list;
the second analysis unit 203 is configured to acquire a next-stage site of the transformer connected to each site in the cross-section inner-boundary site list, and determine a difference site list according to a voltage level relationship between the next-stage site and a site to be modeled, and a relationship between the next-stage site and the cross-section outer-boundary site list and the site to be modeled;
and the modeling unit 204 is configured to use the sites in the difference site list as sites to be modeled, and perform power grid simulation modeling.
Further, the embodiment of the application also provides simulation analysis equipment based on the RTDS large power grid equivalent model, and the equipment comprises a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the steps of the simulation analysis method based on the RTDS large power grid equivalent model according to the program code.
Further, a computer-readable storage medium is provided in an embodiment of the present application, and is configured to store a program code, where the program code is configured to execute the simulation analysis method based on the RTDS large power grid equivalence model according to the above method embodiment.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b and c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.
Claims (10)
1. A simulation analysis method based on an RTDS large power grid equivalent model is characterized by comprising the following steps:
determining a power transmission section of the grid, and acquiring a section inner boundary site list and a section outer boundary site list of the power transmission section;
acquiring a next-stage station of a line connected with each station in the cross section inner boundary station list, and determining a difference station list according to the relationship between the next-stage station and the cross section outer boundary station list and a station list to be built;
acquiring a next-stage station of the transformer connected with each station in the cross section inner boundary station list, and determining a difference station list according to the voltage grade relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the cross section outer boundary station list and the station to be modeled;
and taking the sites in the difference site list as the sites to be modeled, and carrying out power grid simulation modeling.
2. The simulation analysis method based on the RTDS large power grid equivalent model according to claim 1, wherein the obtaining a next station of a line connected to each station in the cross-section inner boundary station list, and determining a difference station list according to a relationship between the next station and the cross-section outer boundary station list and a to-be-created station list specifically includes:
s21, acquiring a next-stage site of a line connected with the ith site in the cross section inner boundary site list, wherein the next-stage site is not in the cross section outer boundary site list and is not in a to-be-built site list, and taking the next-stage site as a difference site;
and S22, enabling i +1= i, returning to the step S21 until all the stations in the boundary station list in the section are traversed, and obtaining a difference station list.
3. The simulation analysis method based on the RTDS large power grid equivalent model according to claim 1, wherein the obtaining of the next-stage site of the transformer connected to each site in the cross-section inner-boundary site list determines the difference site list according to a voltage level relationship between the next-stage site and a site to be modeled, and a relationship between the next-stage site and the cross-section outer-boundary site list and the site to be built list, and specifically includes:
s31, acquiring a next-level station of a line connected with the ith station in the boundary station list in the section, and when the voltage grade of the first next-level station is smaller than that of the station to be modeled, performing voltage grade analysis on the second next-level station;
s32, if the next-stage station is not in the cross section outer boundary station list and is not in the to-be-built station list, taking the next-stage station as a difference station;
and S33, enabling i +1= i, returning to the step S31 until all the sites in the boundary site list in the cross section are traversed, and obtaining a difference site list.
4. The method according to claim 1, wherein the obtaining of the next station of the line connected to each station in the intra-section boundary station list and the obtaining of the next station of the transformer connected to each station in the intra-section boundary station list further include:
and judging whether the station does not exist in the station list of the inner boundary of the section or not, and whether the station list of the outer boundary of the section contains a certain station in a plurality of stations of the next stage or not, if so, finishing the algorithm.
5. A simulation analysis system based on an RTDS large power grid equivalent model is characterized by comprising:
the acquisition unit is used for determining a power transmission section of the net rack and acquiring a section inner boundary site list and a section outer boundary site list of the power transmission section;
the first analysis unit is used for acquiring a next-stage station of a line connected with each station in the cross section inner boundary station list and determining a difference station list according to the relationship between the next-stage station and the cross section outer boundary station list and the station list to be built;
the second analysis unit is used for acquiring a next-stage station of the transformer connected with each station in the cross section inner boundary station list, and determining a difference station list according to the voltage grade relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the cross section outer boundary station list and the station to be modeled;
and the modeling unit is used for taking the station in the difference station list as a station to be modeled and carrying out power grid simulation modeling.
6. The simulation analysis system based on the RTDS large power grid equivalent model according to claim 5, wherein the first analysis unit is specifically configured to:
s21, acquiring a next-stage site of a line connected with the ith site in the cross section inner boundary site list, wherein the next-stage site is not in the cross section outer boundary site list and is not in a to-be-built site list, and taking the next-stage site as a difference site;
and S22, enabling i +1= i, returning to the step S21 until all the stations in the boundary station list in the section are traversed, and obtaining a difference station list.
7. The RTDS large power grid equivalent model-based simulation analysis system according to claim 5, wherein the first analysis unit is specifically configured to:
s31, acquiring a next-level site of a line connected with the ith site in the boundary site list in the section, and when the voltage level of the first next-level site is smaller than that of the site to be modeled, performing voltage level analysis on the second next-level site;
s32, if the next-stage station is not in the cross section outer boundary station list and is not in the to-be-built station list, taking the next-stage station as a difference station;
and S33, enabling i +1= i, returning to the step S31 until all the stations in the boundary station list in the section are traversed, and obtaining a difference station list.
8. The RTDS large power grid equivalent model-based simulation analysis system according to claim 5, further comprising: a judgment unit;
and the judging unit is used for judging whether the station does not exist in the station list of the inner boundary of the section or not, and whether the station list of the outer boundary of the section contains a certain station in a plurality of stations of the next stage or not, if so, the algorithm is ended.
9. A simulation analysis device based on an RTDS large power grid equivalent model is characterized by comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the simulation analysis method based on the RTDS large power grid equivalent model according to any one of claims 1-4 according to instructions in the program code.
10. A computer-readable storage medium for storing program code for executing the method for simulation analysis based on an equivalent model of an RTDS large power grid according to any one of claims 1 to 4.
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