CN114676569B - Power grid simulation analysis example, and generation method, generation system, equipment and medium thereof - Google Patents
Power grid simulation analysis example, and generation method, generation system, equipment and medium thereof Download PDFInfo
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Abstract
The invention discloses a power grid simulation analysis example, a generating method, a generating system, equipment and a medium thereof, wherein the generating method comprises the following steps: acquiring a physical model and a typical operation mode of an actual power grid and key parameters of a power grid simulation analysis example to be generated; obtaining a calculation model of the actual power grid based on the obtained physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to obtain a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining a calculation model with the number of nodes being N and the new energy installed proportion being r; carrying out load flow calculation to obtain the ground state load flow of the power grid simulation analysis example to be generated; and adjusting the electrical parameters of the nodes of the calculation model and the electrical parameters of the branches to obtain the adjusted calculation model. The invention can realize the generation of the configurable example system of the number of nodes and the installation ratio of the new energy.
Description
Technical Field
The invention belongs to the field of power systems and automation thereof, and particularly relates to a power grid simulation analysis example, a generation method, a generation system, equipment and a medium thereof.
Background
The standard examples are the basis for developing characteristic analysis of the power system, and are widely applied to the fields of steady-state and transient analysis of the power system, design, analysis, verification and the like of control measures. Standard examples generally derive from the abstraction and simplification of the actual power system, reflecting the various types of stable characteristics that exist in the actual system. For traditional power systems, a rich set of standard examples, including equipment-level and system-level examples, has been formed internationally.
The IEEE standard calculation is the most commonly used power system standard calculation in various power system researches. The IEEE standard example set comprises a power grid network frame model, model parameters and a ground state flow section with various different node numbers such as 3 nodes, 5 nodes, 9 nodes, 11 nodes, 13 nodes, 14 nodes, 30 nodes, 39 nodes, 43 nodes, 57 nodes, 118 nodes, 145 nodes, 162 nodes and 300 nodes.
The construction of a novel power system mainly based on new energy causes significant changes in the structural form and the operation mode of the system, and faces serious challenges in power balance, safe operation, operation control and the like. At present, a standard power grid model which embodies the characteristics of a novel power system is lacked in a standard calculation example of the power system.
Most of the power grid models adopted in the existing research are based on an IEEE standard example model or a domestic actual power grid model. The power grid network frame and system parameters of the IEEE standard example model are abstractly designed from the North American power grid in the last century, the transmission capacity of a line is greatly different from the current situation of the power grid, and the type of a unit power supply cannot be provided; the installed proportion of new energy of the domestic actual power grid model is not enough, the target that new energy of a novel power system is a main body is not reached, and the power grid model of the actual power grid is not fixed in continuous construction. For the research of the power grid regulation and control technology oriented to a novel power system, different improvements are carried out on an IEEE standard example model or an actual power grid model through different researches, and research results cannot be transversely compared.
In conclusion, the novel power system mainly uses a large number of uncertain random fluctuation power supplies, the system faces the challenge of increasing difficulty in power balance guarantee, the traditional regulation and control technology adopting conventional unit margin regulation faces huge challenge, and the research model-driven multi-resource and multi-target coordination control method is urgent; because the existing standard examples and the existing actual power grid model do not meet the characteristics of new energy as a main body, a power grid simulation analysis example generation technology with configurable new energy installation ratio is needed to meet the research requirements of a new regulation and control technology driven by a model.
Disclosure of Invention
The invention aims to provide a power grid simulation analysis example, a power grid simulation analysis example generation method, a power grid simulation analysis example generation system, power grid simulation analysis equipment and a power grid simulation analysis medium, so as to solve one or more technical problems. The invention provides a power grid simulation analysis example which meets the characteristics of high-proportion new energy installation, has a typical topological structure, has reasonable model parameters and ground state tide, and can be used for simulation analysis of a novel power system; the invention also provides a method and a system for generating the example, which can realize the generation of the example system with configurable node number and new energy installation ratio.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to the power grid simulation analysis example provided by the first aspect of the invention, system unit parameters are shown in table 1; the system branch parameters are shown in table 2; the system ground state power flow is shown in table 3;
TABLE 1 System Unit parameters
TABLE 2 System Branch parameters
TABLE 3 basic State flow of the System
The second aspect of the present invention provides a method for generating a power grid simulation analysis example, which includes the following steps:
acquiring a physical model and a typical operation mode of an actual power grid and key parameters of a power grid simulation analysis example to be generated; the key parameters comprise the number N of nodes and the installed ratio r of new energy;
obtaining a calculation model of the actual power grid based on the obtained physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to obtain a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining the calculation model with the number of nodes being N and the new energy installation occupation ratio being r;
performing load flow calculation based on a calculation model with the number of nodes being N and the installed occupancy ratio of new energy being r and a typical operation mode of the actual power grid to obtain a ground state load flow of a power grid simulation analysis example to be generated;
obtaining an adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed occupation ratio being r; and combining the ground state power flow and the adjusted calculation model to form a power grid simulation analysis example which meets the requirements of a preset node number, a new energy installed proportion and reasonable ground state power flow.
The method is further improved in that the physical model of the actual power grid is a power grid physical connection model and comprises the connection relation and basic parameter information of a power plant bus, a substation bus, a generator, a transformer, a switch, a line and load equipment; a typical operation mode of an actual power grid is a group of power grid operation tidal current values, including bus voltage, unit power, load power, transformer power, line power, and switch state.
In a further improvement of the method of the present invention, the step of obtaining a calculation model of the actual power grid based on the obtained physical model of the actual power grid comprises: and carrying out network topology wiring analysis on the power grid physical connection model, merging the connected charged nodes to a calculation bus according to the connection relation of power grid equipment and the on-off state of switch equipment, and combining equipment physical model parameters to form the power grid topology connection relation represented by the calculation bus to obtain the calculation model.
The method of the present invention is further improved in that the step of performing equivalence processing on the nodes of the computational model to obtain a computational model with N nodes includes:
(1) Obtaining the sequencing results of the conventional energy power plants from small to large according to the installed capacity;
(2) On the basis of the sequencing results from small to large, carrying out pairwise combination equivalence processing on a plurality of nodes under the same conventional energy power plant in the calculation model to form an equivalence calculation model, and combining the equivalence processing until the node number of the equivalence calculation model is equal to the preset node number N;
(3) If the node number of the equivalence calculation model is still larger than the preset node number N after the integration equivalence processing of all the conventional energy power plants, sequencing the transformer stations in the calculation model from small to large according to the transformation capacity;
(4) Performing pairwise merging equivalence processing on corresponding nodes of 220kV and below of the same transformer substation in the calculation model to form an equivalence calculation model based on the sequence of the transformer substations from small to large, and merging equivalence processing until the node number of the equivalence calculation model is equal to a preset node number N;
(5) And (4) if the node number of the equivalent calculation model is still larger than the preset node number N after the merging equivalent processing in the step (4), performing pairwise merging equivalent processing on corresponding nodes of 500kV and below in the same transformer substation in the calculation model based on the sequence from small to large of the transformer substations to form the equivalent calculation model until the node number of the equivalent calculation model is equal to the preset node number N.
The method is further improved in that the step of setting the model parameters of the calculation model with the number of nodes being N and obtaining the calculation model with the number of nodes being N and the new energy installation proportion being r comprises the following steps:
acquiring a general energy plant assembly machine Mt and a new energy assembly machine Mn in a calculation model with the number of nodes being N;
calculating a target Mnt of the new energy total installation according to the total installation Mt of the conventional energy power plant and a preset new energy installation occupation ratio r, wherein the calculation expression is Mnt = r × Mt/(1-r);
calculating to obtain new energy installation gain Rn based on the new energy installation target and the new energy installation target, wherein the calculation expression is that Rn = Mnt/Mn;
adjusting the installation of each new energy unit based on the new energy installation gain to be Pit, wherein the expression is Pit = Rn × Pi; in the formula, pi represents the ith machine assembling machine in the calculation model with the node number N.
The method is further improved in that the step of obtaining the adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed proportion being r comprises the following steps:
1) Obtaining voltage values of N nodes in the ground state power flow of the power grid simulation analysis example to be generated and active power values of all branches;
2) Acquiring a node voltage upper limit value in a node electrical parameter and a branch power upper limit value in a branch electrical parameter of a calculation model with the node number being N and the new energy installation occupation ratio being r;
3) If the node voltage value in the ground state power flow exceeds the node voltage upper limit value, adjusting the node voltage upper limit value in the calculation model parameter to be 5% higher than the node voltage value in the ground state power flow; and if the branch active power value in the ground state power flow exceeds the branch power upper limit value, adjusting the branch power upper limit value in the calculation model parameter to the branch active power value in the ground state power flow, floating by 10%, and obtaining the adjusted calculation model.
The third aspect of the present invention provides a system for generating an example of a power grid simulation analysis, including:
the initial acquisition module is used for acquiring a physical model of an actual power grid, a typical operation mode and key parameters of a power grid simulation analysis example to be generated; the key parameters comprise the number N of nodes and the installed ratio r of new energy;
the calculation model acquisition module is used for acquiring a calculation model of the actual power grid based on the acquired physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to acquire a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining a calculation model with the number of nodes being N and the new energy installed proportion being r;
the ground state power flow obtaining module is used for carrying out power flow calculation based on a calculation model with the number of nodes being N and the new energy installed proportion being r and a typical operation mode of the actual power grid to obtain the ground state power flow of the power grid simulation analysis example to be generated;
the calculation example obtaining module is used for obtaining an adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed occupation ratio being r; and combining the ground state power flow and the adjusted calculation model to form a power grid simulation analysis example which meets the requirements of a preset node number, a new energy installed proportion and reasonable ground state power flow.
A fourth aspect of the present invention provides an electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of generating a grid simulation analysis algorithm according to any of the above aspects of the invention.
A fifth aspect of the present invention provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the method for generating any of the above-mentioned grid simulation analysis examples of the present invention.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a 126-node standard power grid simulation analysis example which comprises a power grid topological structure, system unit parameters, system branch parameters and system ground state tide, wherein the power grid topological structure accords with the characteristics of a typical provincial power grid network frame in China, the installed occupancy ratio of new energy is high, and the 126-node standard power grid simulation analysis example can be used for scientific research, teaching and testing of a novel power system.
The invention provides a method for generating a power grid simulation analysis example, which can realize automatic generation of an example system with configurable node number and new energy installation ratio, can simulate typical characteristics of power systems of various scales and is convenient for carrying out characteristic analysis of various power systems.
Specifically, the invention provides a node equivalence method, which is used for sequentially and equivalently calculating nodes in a model according to a certain sequence, so that the accurate control of the number of the nodes of the model after equivalence can be realized; the invention provides a method for adjusting calculation model parameters, which is used for calculating the gain of a new energy source machine assembling machine based on the conventional energy source machine assembling machine, and accurately adjusting the new energy source machine assembling machine to enable the new energy source assembling machine to be controllable in the occupation ratio; according to the method, the physical model of the actual power grid is obtained, equivalence and other operations are carried out on the physical model to generate the power grid simulation analysis example, so that the network model characteristics of the example have the typical characteristics of the actual power grid, and the number of nodes of the example is configurable, so that the typical characteristics of power systems of various scales can be simulated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic flow diagram of a method for generating an example of a grid simulation analysis in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of an example of a 126-node power grid simulation analysis algorithm generated based on the method of the present invention in the embodiment of the present invention;
fig. 3 is a schematic diagram of a system for generating an example of a grid simulation analysis in accordance with an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above 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 invention described herein are capable of operation in other sequences than those illustrated or 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.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, a method for generating an example of a power grid simulation analysis according to an embodiment of the present invention includes the following steps:
acquiring a physical model and a typical operation mode of an actual power grid and key parameters of a power grid simulation analysis example to be generated; the key parameters comprise the number N of nodes and the installed new energy proportion r;
obtaining a calculation model of the actual power grid based on the obtained physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to obtain a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining the calculation model with the number of nodes being N and the new energy installation occupation ratio being r;
performing load flow calculation based on a calculation model with the number of nodes being N and the installed proportion of new energy being r and a typical operation mode of an actual power grid to obtain a ground state load flow of a power grid simulation analysis example to be generated;
obtaining an adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed occupation ratio being r; and combining the ground state power flow and the adjusted calculation model to form a power grid simulation analysis example which meets the requirements of a preset node number, a new energy installed proportion and reasonable ground state power flow.
The method for generating the power grid simulation analysis examples provided by the embodiment of the invention can realize automatic generation of the example system with configurable node number and new energy installation ratio, can simulate typical characteristics of power systems of various scales and is convenient for developing characteristic analysis of various power systems.
The embodiment of the invention is exemplarily and optionally, the physical model of the actual power grid, that is, the physical connection model of the power grid, includes the connection relation and basic parameter information of the power plant bus, the substation bus, the generator, the transformer, the switch, the line and the load device, and the typical operation mode, that is, a group of power grid operation current values, includes the bus voltage, the unit power, the load power, the transformer power, the line power and the switch state.
In an exemplary optional embodiment of the present invention, the step of obtaining the calculation model of the actual power grid based on the obtained physical model of the actual power grid includes: and carrying out network topology wiring analysis on the actual power grid physical model, merging the connected charged nodes to a calculation bus according to the connection relation of the power grid equipment and the on/off state of the switch equipment, and combining equipment physical model parameters to form a power grid topology connection relation represented by the calculation bus, namely the calculation model.
Specifically, the step of performing equivalence processing on the nodes of the calculation model to obtain the calculation model with the number of the nodes being N includes: merging or equating the power plant bus and the transformer substation bus to enable the number of nodes of the calculation model to be equal to the number of preset nodes; the method comprises the following specific steps: (1) Sequencing conventional energy power plants in the power grid model from small installed capacity to large installed capacity; (2) According to the sequencing of the conventional energy power plants, pairwise merging equivalence is carried out on a plurality of nodes under the same conventional energy power plant in the calculation model to form an equivalence calculation model until the number of the nodes of the equivalence calculation model is equal to the number N of the preset nodes; (3) If the node number of the equivalence calculation model is still larger than the preset node number N after all conventional energy power plants are equivalent, sequencing the transformer stations in the calculation model from small to large according to the transformation capacity; (4) According to the sequence of the transformer substations, pairwise merging equivalence is carried out on corresponding nodes of 220kV and below of the same transformer substation in the calculation model to form an equivalence calculation model until the number of nodes of the equivalence calculation model is equal to the number N of preset nodes; (5) And according to the sequence of the transformer substations, carrying out pairwise combination equivalence on corresponding nodes of 500kV and below of the same transformer substation in the calculation model to form an equivalence calculation model until the number of nodes of the equivalence calculation model is equal to the number N of preset nodes.
According to the method for computing the model equivalence, the nodes in the model are sequentially equivalent according to the sequence in the steps, equivalence is carried out according to the installed capacity of the power plant from small to large and the transformation capacity of the transformer substation from small to large, the original actual power grid model characteristics can be retained to the maximum extent, and the model equivalence is stopped until the number of the nodes is N, so that the accurate control of the number of the model nodes after equivalence can be realized.
Specifically, the method for obtaining the calculation model with the node number N and the new energy installed proportion r includes the following steps:
(1) Calculating the general energy plant general assembly Mt and the new energy general assembly Mn in a calculation model with the number of nodes being N;
(2) Calculating a target Mnt of the new energy assembly machine according to the general assembly machine Mt of the conventional energy power plant and a preset new energy assembly ratio r: mnt = r × Mt/(1-r);
(3) Calculating the new energy installed gain Rn: rn = Mnt/Mn;
(4) The installation of each new energy unit is adjusted to be Pit: pit = Rn × Pi (Pi is the i-th machine assembly machine in the calculation model with the number of nodes N).
According to the adjusting method of the new energy machine assembling machine, the gain of the new energy machine assembling machine is calculated based on the conventional energy machine assembling machine, and the total occupation ratio of the new energy machine assembling machine is controllable by adjusting the new energy machine assembling machine in equal proportion.
Specifically, the method for obtaining the adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed proportion being r includes the following steps:
(1) Performing alternating current power flow calculation based on an actual power grid typical operation mode and a calculation model with N nodes and r new energy installation occupation ratio, wherein the calculation result is the basic state power flow of the example;
(2) Acquiring voltage values of N nodes in the ground state power flow and active power values of all branches;
(3) Acquiring a node voltage upper limit value in a node electrical parameter and a branch power upper limit value in a branch electrical parameter of a calculation model with the node number being N and the new energy installation occupation ratio being r;
(4) If the node voltage value in the ground state power flow exceeds the node voltage upper limit value, adjusting the node voltage upper limit value in the calculation model parameter to be 5% higher than the node voltage value in the ground state power flow; and if the branch active power value in the ground state power flow exceeds the branch power upper limit value, adjusting the branch power upper limit value in the calculation model parameter to the branch active power value floating 10% in the ground state power flow.
According to the method for adjusting the parameters of the calculation model, the basic state power flow of the example is obtained through a power flow calculation method based on the typical operation mode of an actual power grid, and the out-of-limit electrical parameter values of the model are adjusted through comparison of the power flow value and the parameter limit value of the model of the example, so that the electrical parameters of the model of the example are matched with the basic state power flow, and the reasonability of the generated example is ensured.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details of non-careless mistakes in the embodiment of the apparatus, please refer to the embodiment of the method of the present invention.
Referring to fig. 2, a system for generating an example of a power grid simulation analysis provided by an embodiment of the present invention includes:
the initial acquisition module is used for acquiring a physical model of an actual power grid, a typical operation mode and key parameters of a power grid simulation analysis example to be generated; the key parameters comprise the number N of nodes and the installed new energy proportion r;
the calculation model acquisition module is used for acquiring a calculation model of the actual power grid based on the acquired physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to acquire a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining a calculation model with the number of nodes being N and the new energy installed proportion being r;
the ground state power flow obtaining module is used for carrying out power flow calculation based on a calculation model with N nodes and r new energy installed proportion and a typical operation mode of the actual power grid to obtain the ground state power flow of the power grid simulation analysis example to be generated;
the calculation example obtaining module is used for obtaining an adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjusting nodes being N and the new energy installed occupation ratio being r; and combining the ground state power flow and the adjusted calculation model to form a power grid simulation analysis example which meets the requirements of a preset node number, a new energy installed proportion and reasonable ground state power flow.
In the embodiment of the invention, the step of generating the power grid simulation analysis example calculation model according to the actual power grid model comprises the following steps: selecting a certain provincial power grid in China, carrying out topology analysis on a model of the power grid with a voltage level of more than 220kV, forming a power grid node-branch calculation model according to the connection relation of power grid equipment and the on-off state of a breaker and a disconnecting link, and establishing a mapping relation between a calculation model node and an actual power grid unit and load. The calculation model comprises the connection relation between nodes and branches, the unit and the load equipment connected with the nodes, branch electrical parameters (branch limit values, resistance, reactance and the like) and node electrical parameters (unit capacity, voltage limit values and the like). Judging the node number of the calculation model with the voltage class of more than 220kV of the power grid, if the node number is less than the preset node number N, carrying out topology analysis on the model with the voltage class of more than 110kV of the power grid to form a power grid node-branch calculation model, and enabling the node number of the calculation model to be more than or equal to the preset node number N.
In the embodiment of the present invention, the step of calculating the model node equivalence specifically includes: sequencing thermal power plants in the power grid model from small installed capacity to large installed capacity; according to the sequencing of the conventional energy power plants, pairwise merging equivalence is carried out on a plurality of nodes under the same conventional energy power plant in the calculation model to form an equivalence calculation model until the number of the nodes of the equivalence calculation model is equal to the number N of the preset nodes; if the node number of the equivalence calculation model is still larger than the preset node number N after all conventional energy power plants are equivalent, sequencing the transformer stations in the power grid model from small to large according to the transformation capacity; according to the sequence of the transformer substations, carrying out pairwise combination equivalence on nodes of 220kV and below of the same transformer substation in the calculation model to form an equivalence calculation model until the number of the nodes of the equivalence calculation model is equal to the number N of preset nodes; and according to the sequence of the transformer substations, carrying out pairwise combination equivalence on nodes of 500kV and below of the same transformer substation in the calculation model to form an equivalence calculation model until the number of the nodes of the equivalence calculation model is equal to the number N of the preset nodes.
In the embodiment of the present invention, the setting of the model parameters of the calculation model includes the following steps: calculating the general assembly Mt and the new energy general assembly Mn of the conventional energy power plant in the equivalent calculation model; calculating a target Mnt of the new energy assembly machine according to the general assembly machine Mt of the conventional energy power plant and a preset new energy assembly ratio r: mnt = r × Mt/(1-r); calculating the new energy installed gain Rn: rn = Mnt/Mn; and (3) calculating an installation target Pit of each new energy source unit: pit = Rn × Pi (Pi is the unit installation in the equivalence calculation model).
In the embodiment of the invention, the ground state power flow of the power grid simulation analysis example is set, and the method comprises the following steps: acquiring actual operation data of a selected provincial power grid in China, calculating total load active power, and acquiring power of all units and loads at the moment when the total load active power is maximum; distributing the power of each unit and load to each node of the calculation model based on the mapping relation between the nodes of the calculation model and the actual power grid units and loads; performing power grid load flow calculation based on the calculation model and the power of each node, wherein the load flow calculation result comprises node voltage, line power, unit power and the like, and the load flow calculation result is the ground state load flow of the power grid simulation analysis example; and if the node voltage and the line power do not meet the voltage limit and the branch limit in the calculation model and the unit power does not meet the unit capacity limit, modifying the voltage limit as the load flow calculation node voltage, modifying the branch limit as the load flow calculation line power, modifying the unit capacity as the load flow calculation unit power, and obtaining the modified calculation model which is the power grid model of the power grid simulation analysis example.
Referring to fig. 3, a power grid topology structure of the 126-node standard power grid simulation analysis algorithm provided by the embodiment of the present invention is shown in fig. 3, and the power grid topology structure includes 126 nodes, including 18 new energy units, 36 conventional energy units, 91 loads, and 194 branches; the voltage reference value of the system is 100kV, and the power reference value is 100MW; wherein, the system unit parameters are shown in the table 1; the system branch parameters are shown in table 2 above; the system ground state power flow is shown in table 3 above.
The embodiment of the invention provides a 126-node power grid simulation analysis example, which is used for generating a power grid simulation analysis example with preset node numbers according with the characteristics of a novel power system by setting abstraction, equivalence and parameters of an actual power grid calculation model, and provides a standard 126-node power grid simulation analysis example.
In summary, the invention provides a power grid simulation analysis example and a power grid simulation analysis generation method conforming to the characteristics of the novel power system, which can provide standard model support for scientific research, experiments and other work of the novel power system, wherein the power grid simulation analysis example and the power grid simulation model include power grid network frames conforming to the characteristics of the novel power system and model parameter data. The achievement of the invention has an important supporting effect on the relevant research of the novel power system, and the basic grid frame based on the power grid simulation analysis example and the information such as various typical equipment model parameters can be used for researching the planning and the optimization control technology of the power and electric quantity balance of the high-proportion new energy system, and can be used for researching the stability mechanism and the optimization control technology of the novel power system by constructing the typical scene reflecting different types of stability leading characteristics.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A generation method of a power grid simulation analysis example is characterized by comprising the following steps:
acquiring a physical model and a typical operation mode of an actual power grid and key parameters of a power grid simulation analysis example to be generated; the key parameters comprise the number N of nodes and the installed ratio r of new energy;
obtaining a calculation model of the actual power grid based on the obtained physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to obtain a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining a calculation model with the number of nodes being N and the new energy installed proportion being r;
performing load flow calculation based on a calculation model with the number of nodes being N and the installed occupancy ratio of new energy being r and a typical operation mode of the actual power grid to obtain a ground state load flow of a power grid simulation analysis example to be generated;
obtaining an adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed occupation ratio being r; and combining the ground state power flow and the adjusted calculation model to form a power grid simulation analysis example which meets the requirements of a preset node number, a new energy installed proportion and reasonable ground state power flow.
2. The method for generating the power grid simulation analysis example according to claim 1, wherein the physical model of the actual power grid is a power grid physical connection model, and comprises connection relations and basic parameter information of a power plant bus, a substation bus, a generator, a transformer, a switch, a line and load equipment; a typical operation mode of an actual power grid is a group of power grid operation tidal current values, including bus voltage, unit power, load power, transformer power, line power, and switch state.
3. The method according to claim 2, wherein the step of obtaining the calculation model of the actual power grid based on the obtained physical model of the actual power grid comprises: and carrying out network topology wiring analysis on the power grid physical connection model, merging the connected charged nodes to a calculation bus according to the connection relation of power grid equipment and the on-off state of switch equipment, and combining equipment physical model parameters to form the power grid topology connection relation represented by the calculation bus to obtain the calculation model.
4. The method for generating the power grid simulation analysis example according to claim 3, wherein the step of performing equivalence processing on the nodes of the calculation model to obtain the calculation model with the number of the nodes being N comprises:
(1) Obtaining the sequencing results of the conventional energy power plants from small to large according to the installed capacity;
(2) Performing pairwise merging equivalence treatment on a plurality of nodes under the same conventional energy power plant in the calculation model based on the sequencing result from small to large to form an equivalence calculation model, and merging equivalence treatment until the number of the nodes of the equivalence calculation model is equal to the preset number of the nodes N;
(3) If the node number of the equivalence calculation model is still larger than the preset node number N after the integration equivalence processing of all the conventional energy power plants, sequencing the transformer stations in the calculation model from small to large according to the transformation capacity;
(4) Performing pairwise merging equivalence processing on corresponding nodes of 220kV and below of the same transformer substation in the calculation model to form an equivalence calculation model based on the sequence of the transformer substations from small to large, and merging equivalence processing until the node number of the equivalence calculation model is equal to a preset node number N;
(5) And (5) if the node number of the equivalent calculation model is still greater than the preset node number N after the combination equivalent processing in the step (4), performing pairwise combination equivalent processing on corresponding nodes of 500kV and below in the same transformer substation in the calculation model based on the sequence of the transformer substations from small to large to form the equivalent calculation model until the node number of the equivalent calculation model is equal to the preset node number N.
5. The method for generating the power grid simulation analysis example according to claim 2, wherein the step of setting model parameters of the calculation model with the number of nodes N and obtaining the calculation model with the number of nodes N and the new energy installed proportion r comprises the steps of:
acquiring a general energy plant assembly machine Mt and a new energy assembly machine Mn in a calculation model with the number of nodes being N;
calculating a target Mnt of the new energy total installation according to the total installation Mt of the conventional energy power plant and a preset new energy installation occupation ratio r, wherein the calculation expression is Mnt = r × Mt/(1-r);
calculating to obtain new energy installation gain Rn based on the new energy installation target and the new energy installation target, wherein the calculation expression is that Rn = Mnt/Mn;
adjusting the installation machine of each new energy machine set based on the new energy installation gain to be Pit, wherein the expression is Pit = Rn multiplied by Pi; in the formula, pi represents the ith machine assembling machine in the calculation model with the node number N.
6. The method for generating the power grid simulation analysis example according to claim 2, wherein the step of obtaining the adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed proportion being r comprises:
1) Obtaining voltage values of N nodes in the ground state power flow of the power grid simulation analysis example to be generated and active power values of all branches;
2) Acquiring a node voltage upper limit value in a node electrical parameter and a branch power upper limit value in a branch electrical parameter of a calculation model with the node number being N and the new energy installation occupation ratio being r;
3) If the node voltage value in the ground state power flow exceeds the node voltage upper limit value, adjusting the node voltage upper limit value in the calculation model parameter to be 5% higher than the node voltage value in the ground state power flow; and if the branch active power value in the ground state power flow exceeds the branch power upper limit value, adjusting the branch power upper limit value in the calculation model parameter to the branch active power value in the ground state power flow, floating by 10%, and obtaining the adjusted calculation model.
7. The method for generating the power grid simulation analysis example according to claim 1, wherein in the generated power grid simulation analysis example, system unit parameters are shown in table 1; the system branch parameters are shown in table 2; the system ground state power flow is shown in table 3;
TABLE 1 System Unit parameters
TABLE 2 System Branch parameters
TABLE 3 basic State flow of the System
8. A generation system of a power grid simulation analysis example is characterized by comprising the following steps:
the initial acquisition module is used for acquiring a physical model of an actual power grid, a typical operation mode and key parameters of a power grid simulation analysis example to be generated; the key parameters comprise the number N of nodes and the installed ratio r of new energy;
the calculation model acquisition module is used for acquiring a calculation model of the actual power grid based on the acquired physical model of the actual power grid, and performing equivalence processing on nodes of the calculation model to acquire a calculation model with the number of the nodes being N; setting model parameters of a calculation model with the number of nodes being N, and obtaining a calculation model with the number of nodes being N and the new energy installed proportion being r;
the ground state power flow obtaining module is used for carrying out power flow calculation based on a calculation model with the number of nodes being N and the new energy installed proportion being r and a typical operation mode of the actual power grid to obtain the ground state power flow of the power grid simulation analysis example to be generated;
the calculation example obtaining module is used for obtaining an adjusted calculation model based on the electrical parameters of the nodes and the electrical parameters of the branches of the calculation model with the number of the ground state power flow adjustment nodes being N and the new energy installed occupation ratio being r; and combining the ground state power flow and the adjusted calculation model to form a power grid simulation analysis example which meets the requirements of a preset node number, a new energy installed proportion and reasonable ground state power flow.
9. An electronic device, comprising:
at least one processor; and (c) a second step of,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of generating a grid simulation analysis example as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method for generating a grid simulation analysis example according to any of claims 1 to 7.
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