CN111401729A - Newly-increased black start unit distribution point determining method and system - Google Patents
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Abstract
The invention provides a method and a system for determining the distribution points of a newly-added black start unit, which comprise the following steps: acquiring topological information of the networking of the existing black starter as an initial topology; acquiring the capacity and the average reactance of a black start unit of an initial topology, and calculating the initial stiffness of the initial topology according to the capacity and the average reactance of the black start unit; calculating the target stiffness of the networking topology of the target black starter of the scheme added by the black starter set to be selected; respectively calculating the strength difference value of the target strength and the initial strength of each black start unit increasing scheme to be selected; and respectively calculating the ratio of the strength difference value of each black-start unit increasing scheme to be selected to the corresponding investment cost, and selecting the black-start unit increasing scheme to be selected with the largest ratio as an execution scheme. The method for determining the layout of the newly blackened starting unit, which is provided by the invention, provides a quantitative calculation means for determining the layout of the blackened starting unit, so that the layout selection is more scientific and reasonable.
Description
Technical Field
The invention relates to the technical field of black start, in particular to a method and a system for determining the distribution points of a newly added black start unit.
Background
With the rapid development of the economic society, the installed capacity and the load of the power system are continuously new and high; and the ultra-high voltage alternating current and direct current transmission is rapidly developed, large-scale wind power generation, photovoltaic power generation and micro-grid are connected to a power grid in a large quantity, the dynamic characteristics of the whole power system are greatly changed, and the operating point of the power system is closer to the stable limit point of the power system. In such cases, the risk of a major power outage in the system due to a power failure or improper operation is increasing.
After a power system has a major power failure accident, economic and social influences brought by the power system have great relevance to power failure time, and the longer the power failure time is, the greater the system recovery difficulty is, and the greater the loss is. The recovery process after the power failure accident of the system comprises three stages of black start, net rack recovery and load recovery, wherein the black start stage is the basis of the whole recovery process, and the importance of the black start stage is self-evident. In the black start phase, the number and distribution of black start units are very important influencing factors. The proper black start unit distribution can greatly accelerate the recovery process in the black start stage, thereby shortening the system recovery time.
In order to improve the recovery speed of the system after a power failure accident, a black start unit is required to be additionally arranged in the system, the research on new black start distribution is still in a starting stage, the distribution of the new black start unit is mostly determined by depending on the operation experience, and a quantitative analysis means and a quantitative analysis method are lacked. Therefore, research needs to be carried out on the distribution point for determining the newly added black start unit, and a quantitative analysis method is provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a system for determining the distribution points of a newly-added black start unit, so as to solve the technical problems.
In a first aspect, the present invention provides a method for determining a point distribution of a newly added black start unit, including:
acquiring topological information of the networking of the existing black starter as an initial topology;
acquiring the capacity and the average reactance of a black start unit of an initial topology, and calculating the initial stiffness of the initial topology according to the capacity and the average reactance of the black start unit;
calculating the target stiffness of the networking topology of the target black starter of the scheme added by the black starter set to be selected;
respectively calculating the strength difference value of the target strength and the initial strength of each black start unit increasing scheme to be selected;
and respectively calculating the ratio of the strength difference value of each black-start unit increasing scheme to be selected to the corresponding investment cost, and selecting the black-start unit increasing scheme to be selected with the largest ratio as an execution scheme.
Further, the acquiring topology information of the existing black starter networking as an initial topology includes:
acquiring sites of available black start units in a power grid system, the number of the black start units, the capacity of the black start units and the start sequence of the black start units contained in the sites;
acquiring a connection topological relation of an available black start unit of a power grid system and reactance of a connection circuit;
and generating a connection matrix of the available black start unit of the power grid system according to the connection line and the reactance of the connection line of the available black start unit.
Further, the acquiring black-start unit capacity and average reactance of the initial topology, and calculating initial stiffness of the initial topology according to the black-start unit capacity and the average reactance include:
calculating the weighted capacity sum of the black start unit of the power grid according to the capacity and the start sequence of the black start unit;
taking the quotient of the weighted capacity sum of the black start unit and a preset reference capacity as the weighted capacity sum per unit value of the black start unit;
calculating an average reactance per unit value according to the total length of the connection circuit of the power grid available black start unit and the total reactance per unit value of the bus circuit;
and taking the quotient of the weighted capacity and the per-unit value of the black-start unit and the per-unit value of the average reactance as the initial stiffness.
Further, the calculating the target stiffness of the target black-start engine networking topology of the black-start unit addition scheme to be selected includes:
setting a plurality of black start unit adding schemes to be selected, wherein the black start unit adding schemes to be selected comprise positions of newly added stations;
and constructing a target black-start unit networking topology on the basis of the initial topology according to the positions of the newly added stations of the black-start unit adding scheme to be selected.
Further, the method further includes the steps of calculating the ratio of the strength difference value of each black-start unit increase scheme to be selected to the corresponding investment cost, and selecting the black-start unit increase scheme to be selected with the largest ratio as an execution scheme, wherein the method further includes the following steps:
and acquiring the investment cost of the newly added station of the increase scheme of the black start unit to be selected to obtain the investment cost of the increase scheme of the black start unit to be selected.
In a second aspect, the present invention provides a new black start unit distribution determining system, including:
the topology acquisition unit is configured to acquire topology information of the existing black starter networking as an initial topology;
the initial calculation unit is configured for acquiring the capacity and the average reactance of a black start unit of an initial topology, and calculating the initial stiffness of the initial topology according to the capacity and the average reactance of the black start unit;
the target calculation unit is configured for calculating the target stiffness of the networking topology of the target black starter of the black starter unit addition scheme to be selected;
the difference value calculating unit is configured to calculate the strength difference value between the target strength and the initial strength of each black start unit increasing scheme to be selected respectively;
and the target determining unit is configured to calculate the ratio of the strength difference value of each black-start unit increasing scheme to be selected to the corresponding investment cost respectively, and select the black-start unit increasing scheme to be selected with the largest ratio as an execution scheme.
Further, the topology acquisition unit includes:
the system comprises an information acquisition module, a data acquisition module and a data processing module, wherein the information acquisition module is configured to acquire sites of an available black start unit in a power grid system, the number of the black start units contained in the sites, the capacity of the black start units and the start sequence of the black start units;
the reactance obtaining module is configured to obtain a connection topological relation of the black start unit of the power grid system and reactance of a connection circuit;
and the matrix establishing module is configured for generating a connection matrix of the available black start unit of the power grid system according to the connection line and the reactance of the connection line of the available black start unit.
Further, the initial calculation unit includes:
the capacity summation module is configured for calculating the weighted capacity sum of the black start units of the power grid according to the capacity of the black start units and the start sequence;
the summation conversion module is configured to take the quotient of the weighted capacity sum of the black start unit and a preset reference capacity as the weighted capacity sum per unit value of the black start unit;
the reactance averaging module is configured for calculating an average reactance per unit value according to the total length of the connecting lines of the power grid available black start unit and the per unit value of the total line reactance;
and the quotient value calculation module is configured to take the quotient of the weighted capacity and the per-unit value of the black-start unit and the per-unit value of the average reactance as the initial stiffness.
Further, the target calculation unit includes:
the system comprises a scheme setting module, a selection module and a selection module, wherein the scheme setting module is configured to set a plurality of black-start unit increasing schemes to be selected, and the black-start unit increasing schemes to be selected comprise positions of newly added stations;
and the target construction module is configured and used for constructing a target black-start unit networking topology on the basis of the initial topology according to the positions of the newly added stations of the black-start unit adding scheme to be selected.
Further, the system further comprises:
and the investment acquisition module is configured for acquiring the investment cost of the newly added station of the increase scheme of the black start unit to be selected, so as to obtain the investment cost of the increase scheme of the black start unit to be selected.
In a third aspect, a terminal is provided, including:
a processor, a memory, wherein,
the memory is used for storing a computer program which,
the processor is used for calling and running the computer program from the memory so as to make the terminal execute the method of the terminal.
In a fourth aspect, a computer storage medium is provided having stored therein instructions that, when executed on a computer, cause the computer to perform the method of the above aspects.
The beneficial effect of the invention is that,
the invention provides a method and a system for determining the distribution points of newly added black start units, which provides a strength index of a network containing the black start units, then calculates the change of the strength index of the network after the newly added black start units are arranged at different sites and the investment caused by the newly added black start units at different sites respectively, and establishes a method for determining the distribution points of the black start units. The method for determining the layout of the newly blackened starting unit, which is provided by the invention, provides a quantitative calculation means for determining the layout of the blackened starting unit, so that the layout selection is more scientific and reasonable. According to the method, the influence of the black start unit and the grid structure on the capability of recovering to the original state after the power grid is greatly disturbed is evaluated through the index of the hardness strength of the power grid, and a means is provided for quantitatively analyzing the benefit of the new black start unit. Meanwhile, the factor that the investment required by newly adding black start units at different sites is different is considered, so that the calculation result is more reasonable.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention.
Fig. 2 is a modified IEEE30 node system architecture diagram of the method of one embodiment of the present invention.
FIG. 3 is a schematic block diagram of a system of one embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all 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.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention. The execution subject in fig. 1 may be a distribution point determination system for a new blacking start unit.
As shown in fig. 1, the method 100 includes:
and 150, respectively calculating the ratio of the strength difference value of each black-start unit increasing scheme to be selected to the corresponding investment cost, and selecting the black-start unit increasing scheme to be selected with the largest ratio as an execution scheme.
In order to facilitate understanding of the present invention, the method for determining the distribution point of the newly added black start unit provided by the present invention is further described below by using the principle of the method for determining the distribution point of the newly added black start unit of the present invention and combining the process of determining the distribution point of the newly added black start unit in the embodiment.
Specifically, the method for determining the distribution point of the newly added black start unit comprises the following steps:
simulation calculation is performed by taking a modified IEEE30 node system as an example, and a calculation flow considering the power grid resilience of the black start process is described. A modified IEEE30 node system architecture is shown in fig. 2. Wherein the power plant located at node 1 comprises 3 black start units, and the power plant located at node 25 comprises 2 black start units, and the unit capacities and corresponding unit start sequences are shown in table 1.
TABLE 1 Black Start Unit Capacity and Start sequence
The modified IEEE30 node system contains 41 lines in total, and the line reactance is shown in table 2.
TABLE 2 IEEE30 System line parameters
According to the proposed calculation method for the power grid restoring force considering the black start process, the specific steps of calculating the power grid restoring force after the major power failure accident of the IEEE30 node system are as follows:
s1: analyzing the network structure of the power grid, acquiring data used for calculation, and establishing a weighted network connection matrix M corresponding to the system;
calculating the used data including the power plant with the available black start unit in the system, the number and the capacity of the available black start units contained in the power plant and the starting sequence of each black start unit; the topological relation of the available transmission lines in the system and the corresponding line parameters. The weighted network connection matrix M corresponding to the system is a square matrix, and the number of rows and columns is equal to the number of available station nodes in the system. When nodes i and i in the systemThere are available crossovers l between nodes jijAnd line lijPer unit value of line reactance of xijThen connect the elements M in the matrix Mij＝Mji＝xij(ii) a On the contrary, if there is no available tie line between node i and node j in the system, Mij＝Mji0. For a system with n sites, the corresponding connection matrix M is of the form as follows.
In the formula, for an arbitrary element MijAnd MjiIn the presence of Mij＝Mji。
Calculating line lijPer unit value x of line reactance ofijTime, reference value SBTaken as 100MVA, UBAnd taking the standard voltage of each voltage class.
In the modified IEEE30 node system, the power plant containing units on node 1 and node 25 are black start units, and the corresponding unit capacities and start priorities are shown in table 1. The units in the power plants on the nodes 2,13,22,23 and 27 have no self-starting capability and are the units to be recovered. The voltage class of the IEEE30 node system is 220 kV.
In this step, the IEEE30 node system is analyzed, and various data required in the calculation process can be acquired, as shown in tables 1 and 2. And establishing a connection matrix M corresponding to the IEEE30 node system according to the topological structure of the IEEE30 node system and the per unit value of each line reactance.
S2: calculating the strength Str of the network before the newly-added black start unit1。
The robustness of a network is defined as the ability of the network to quickly recover from an initial operational state after an attack. In the case of a power system, the strength means that the power system can be quickly restored to the initial state after a large-scale power failure accident. After a large-scale power failure occurs to the power system, the process of recovering the power system to the initial state comprises three stages: black start, net rack reconstruction and load recovery. The black start stage is to provide starting power for other units and recover part of important loads after the unit with the black start capability is quickly started. The capacity of the black-start unit represents the capability of the system in the initial recovery stage, and the larger the capacity of the black-start unit is, the stronger the recovery capability is represented, and the higher the robustness of the system is. The system recovery process is essentially a process of timely re-transmitting electric power from the black-start unit to the rest stations in the system, and the tighter the structure of the whole system is, the smaller the difficulty of power supply re-recovery is, and the higher the robustness of the system is.
Weighted sum of black start units in the power plant on node 1
Weighted sum of black start units in a power plant on node 25
Thus, the weighted capacity sum P of all available black start units in each power plant in the systemblackAs follows
Pblack＝153.33
PblackCorresponding per unit value of
Since there are 41 lines in the IEEE30 node system, the number of elements other than 0 in the network weight matrix M is 82, that is, the sum of all elements other than 0 in L ═ 82. M is shown in the following formula
sum(M)＝16.438
Therefore, the power grid strength index before the new blackout start distribution can be defined as
S3: in this example, because the normal load station cannot add the black start unit distribution point due to the technical condition limitation, the IEEE30 node system may add the station Set _ G of the black start unit distribution point as {2,13,22,23,27 }. The capacity and corresponding investment of the newly added black start unit at different nodes are shown in the following table.
After the new blacking of different stations in Set _ G starts the distribution of the units, the grid robustness is shown in the following table
S5, calculating the change of the power grid strength after the new blacking start unit distribution at different stations in Set _ G, wherein the ratio Pr i of the change △ Str of the power grid strength and the corresponding investment C is shown in the following table as shown in the table
As can be seen from the above table, the Pr i value corresponding to the newly blackened starting unit at the node 22 is the maximum, which is the optimal distribution point of the newly blackened starting unit.
As shown in fig. 3, the system 300 includes:
the topology acquisition unit 310 is configured to acquire topology information of the existing black starter networking as an initial topology;
the initial calculation unit 320 is configured to collect black start unit capacity and average reactance of an initial topology, and calculate initial stiffness of the initial topology according to the black start unit capacity and the average reactance;
the target calculation unit 330 is configured to calculate the target stiffness of the target black-start engine networking topology of the black-start unit increase scheme to be selected;
the difference value calculating unit 340 is configured to calculate a strength difference value between the target strength and the initial strength of each black start unit to be selected to increase the scheme;
and the target determining unit 350 is configured to calculate a ratio of the strength difference of each black-start unit increase scheme to be selected to the corresponding investment cost, and select the black-start unit increase scheme to be selected with the largest ratio as the execution scheme.
Optionally, as an embodiment of the present invention, the topology acquiring unit includes:
the system comprises an information acquisition module, a data acquisition module and a data processing module, wherein the information acquisition module is configured to acquire sites of an available black start unit in a power grid system, the number of the black start units contained in the sites, the capacity of the black start units and the start sequence of the black start units;
the reactance obtaining module is configured to obtain a connection topological relation of the black start unit of the power grid system and reactance of a connection circuit;
and the matrix establishing module is configured for generating a connection matrix of the available black start unit of the power grid system according to the connection line and the reactance of the connection line of the available black start unit.
Optionally, as an embodiment of the present invention, the initial calculating unit includes:
the capacity summation module is configured for calculating the weighted capacity sum of the black start units of the power grid according to the capacity of the black start units and the start sequence;
the summation conversion module is configured to take the quotient of the weighted capacity sum of the black start unit and a preset reference capacity as the weighted capacity sum per unit value of the black start unit;
the reactance averaging module is configured for calculating an average reactance per unit value according to the total length of the connecting lines of the power grid available black start unit and the per unit value of the total line reactance;
and the quotient value calculation module is configured to take the quotient of the weighted capacity and the per-unit value of the black-start unit and the per-unit value of the average reactance as the initial stiffness.
Optionally, as an embodiment of the present invention, the target computing unit includes:
the system comprises a scheme setting module, a selection module and a selection module, wherein the scheme setting module is configured to set a plurality of black-start unit increasing schemes to be selected, and the black-start unit increasing schemes to be selected comprise positions of newly added stations;
and the target construction module is configured and used for constructing a target black-start unit networking topology on the basis of the initial topology according to the positions of the newly added stations of the black-start unit adding scheme to be selected.
Optionally, as an embodiment of the present invention, the system further includes:
and the investment acquisition module is configured for acquiring the investment cost of the newly added station of the increase scheme of the black start unit to be selected, so as to obtain the investment cost of the increase scheme of the black start unit to be selected.
Fig. 3 is a schematic structural diagram of a terminal system 300 according to an embodiment of the present invention, where the terminal system 300 may be used to execute the method for determining the distribution point of the new blacking start unit according to the embodiment of the present invention.
The terminal system 300 may include: a processor 310, a memory 320, and a communication unit 330. The components communicate via one or more buses, and those skilled in the art will appreciate that the architecture of the servers shown in the figures is not intended to be limiting, and may be a bus architecture, a star architecture, a combination of more or less components than those shown, or a different arrangement of components.
The memory 320 may be used for storing instructions executed by the processor 310, and the memory 320 may be implemented by any type of volatile or non-volatile storage terminal or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The executable instructions in memory 320, when executed by processor 310, enable terminal 300 to perform some or all of the steps in the method embodiments described below.
The processor 310 is a control center of the storage terminal, connects various parts of the entire electronic terminal using various interfaces and lines, and performs various functions of the electronic terminal and/or processes data by operating or executing software programs and/or modules stored in the memory 320 and calling data stored in the memory. The processor may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the processor 310 may include only a Central Processing Unit (CPU). In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.
A communication unit 330, configured to establish a communication channel so that the storage terminal can communicate with other terminals. And receiving user data sent by other terminals or sending the user data to other terminals.
The present invention also provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Therefore, the invention provides a network strength index containing the black start unit, and then the change of the network strength index after the black start unit is newly added at different sites is calculated respectively, and the investment caused by the new black start unit added at different sites is different, so as to establish a method for determining the distribution points of the black start unit. The method for determining the layout of the newly blackened starting unit, which is provided by the invention, provides a quantitative calculation means for determining the layout of the blackened starting unit, so that the layout selection is more scientific and reasonable. According to the method, the influence of the black start unit and the grid structure on the capability of recovering to the original state after the power grid is greatly disturbed is evaluated through the index of the hardness strength of the power grid, and a means is provided for quantitatively analyzing the benefit of the new black start unit. Meanwhile, the calculation result is more reasonable by considering the factor that the investment required by newly adding black start units at different sites is different, and the technical effect achieved by the embodiment can be referred to the description above, and is not described again here.
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be embodied in the form of a software product, where the computer software product is stored in a storage medium, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, and the storage medium can store program codes, and includes instructions for enabling a computer terminal (which may be a personal computer, a server, or a second terminal, a network terminal, and the like) to perform all or part of the steps of the method in the embodiments of the present invention.
The same and similar parts in the various embodiments in this specification may be referred to each other. Especially, for the terminal embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.
In the embodiments provided in the present invention, it should be understood that the disclosed system and method can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional 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, systems 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 invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A newly increased black start unit distribution point determining method is characterized by comprising the following steps:
acquiring topological information of the networking of the existing black starter as an initial topology;
acquiring the capacity and the average reactance of a black start unit of an initial topology, and calculating the initial stiffness of the initial topology according to the capacity and the average reactance of the black start unit;
calculating the target stiffness of the networking topology of the target black starter of the scheme added by the black starter set to be selected;
respectively calculating the strength difference value of the target strength and the initial strength of each black start unit increasing scheme to be selected;
and respectively calculating the ratio of the strength difference value of each black-start unit increasing scheme to be selected to the corresponding investment cost, and selecting the black-start unit increasing scheme to be selected with the largest ratio as an execution scheme.
2. The method of claim 1, wherein the obtaining topology information of an existing black starter networking as an initial topology comprises:
acquiring sites of available black start units in a power grid system, the number of the black start units, the capacity of the black start units and the start sequence of the black start units contained in the sites;
acquiring a connection topological relation of an available black start unit of a power grid system and reactance of a connection circuit;
and generating a connection matrix of the available black start unit of the power grid system according to the connection line and the reactance of the connection line of the available black start unit.
3. The method of claim 1, wherein collecting black-start unit capacity and average reactance of an initial topology and calculating an initial stiffness of the initial topology based on the black-start unit capacity and average reactance comprises:
calculating the weighted capacity sum of the black start unit of the power grid according to the capacity and the start sequence of the black start unit;
taking the quotient of the weighted capacity sum of the black start unit and a preset reference capacity as the weighted capacity sum per unit value of the black start unit;
calculating an average reactance per unit value according to the total length of the connection circuit of the power grid available black start unit and the total reactance per unit value of the bus circuit;
and taking the quotient of the weighted capacity and the per-unit value of the black-start unit and the per-unit value of the average reactance as the initial stiffness.
4. The method according to claim 1, wherein the calculating the target stiffness of the target black starter networking topology of the to-be-selected black starter group addition scheme comprises:
setting a plurality of black start unit adding schemes to be selected, wherein the black start unit adding schemes to be selected comprise positions of newly added stations;
and constructing a target black-start unit networking topology on the basis of the initial topology according to the positions of the newly added stations of the black-start unit adding scheme to be selected.
5. The method according to claim 1, wherein the ratio of the strength difference of each black-start unit increase scheme to be selected to the corresponding investment cost is calculated separately, and the black-start unit increase scheme to be selected with the largest ratio is selected as the execution scheme, and the method further comprises:
and acquiring the investment cost of the newly added station of the increase scheme of the black start unit to be selected to obtain the investment cost of the increase scheme of the black start unit to be selected.
6. The utility model provides a newly-increased black start unit stationing confirmation system which characterized in that includes:
the topology acquisition unit is configured to acquire topology information of the existing black starter networking as an initial topology;
the initial calculation unit is configured for acquiring the capacity and the average reactance of a black start unit of an initial topology, and calculating the initial stiffness of the initial topology according to the capacity and the average reactance of the black start unit;
the target calculation unit is configured for calculating the target stiffness of the networking topology of the target black starter of the black starter unit addition scheme to be selected;
the difference value calculating unit is configured to calculate the strength difference value between the target strength and the initial strength of each black start unit increasing scheme to be selected respectively;
and the target determining unit is configured to calculate the ratio of the strength difference value of each black-start unit increasing scheme to be selected to the corresponding investment cost respectively, and select the black-start unit increasing scheme to be selected with the largest ratio as an execution scheme.
7. The system of claim 6, wherein the topology acquisition unit comprises:
the system comprises an information acquisition module, a data acquisition module and a data processing module, wherein the information acquisition module is configured to acquire sites of an available black start unit in a power grid system, the number of the black start units contained in the sites, the capacity of the black start units and the start sequence of the black start units;
the reactance obtaining module is configured to obtain a connection topological relation of the black start unit of the power grid system and reactance of a connection circuit;
and the matrix establishing module is configured for generating a connection matrix of the available black start unit of the power grid system according to the connection line and the reactance of the connection line of the available black start unit.
8. The system of claim 6, wherein the initial computing unit comprises:
the capacity summation module is configured for calculating the weighted capacity sum of the black start units of the power grid according to the capacity of the black start units and the start sequence;
the summation conversion module is configured to take the quotient of the weighted capacity sum of the black start unit and a preset reference capacity as the weighted capacity sum per unit value of the black start unit;
the reactance averaging module is configured for calculating an average reactance per unit value according to the total length of the connecting lines of the power grid available black start unit and the per unit value of the total line reactance;
and the quotient value calculation module is configured to take the quotient of the weighted capacity and the per-unit value of the black-start unit and the per-unit value of the average reactance as the initial stiffness.
9. The system of claim 6, wherein the target computing unit comprises:
the system comprises a scheme setting module, a selection module and a selection module, wherein the scheme setting module is configured to set a plurality of black-start unit increasing schemes to be selected, and the black-start unit increasing schemes to be selected comprise positions of newly added stations;
and the target construction module is configured and used for constructing a target black-start unit networking topology on the basis of the initial topology according to the positions of the newly added stations of the black-start unit adding scheme to be selected.
10. The system of claim 6, further comprising:
and the investment acquisition module is configured for acquiring the investment cost of the newly added station of the increase scheme of the black start unit to be selected, so as to obtain the investment cost of the increase scheme of the black start unit to be selected.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112288237A (en) * | 2020-10-12 | 2021-01-29 | 国网江苏省电力有限公司镇江供电分公司 | Black starter subregion partitioning method based on synergy optimization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107368930A (en) * | 2017-08-07 | 2017-11-21 | 国网天津节能服务有限公司 | A kind of black starting-up site selection of coal fired power plant method suitable for power system partition recovery pattern |
| CN110148972A (en) * | 2019-06-20 | 2019-08-20 | 华北电力大学（保定） | Extension black-start scheme determines method, apparatus and electronic equipment |
| WO2019184286A1 (en) * | 2018-03-29 | 2019-10-03 | 山东大学 | Online dynamic decision-making method and system for unit restoration |
| CN110676869A (en) * | 2018-07-02 | 2020-01-10 | 国网山东省电力公司潍坊供电公司 | Method for determining distribution points of newly-increased black start unit |
-
2020
- 2020-03-12 CN CN202010172111.6A patent/CN111401729A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107368930A (en) * | 2017-08-07 | 2017-11-21 | 国网天津节能服务有限公司 | A kind of black starting-up site selection of coal fired power plant method suitable for power system partition recovery pattern |
| WO2019184286A1 (en) * | 2018-03-29 | 2019-10-03 | 山东大学 | Online dynamic decision-making method and system for unit restoration |
| CN110676869A (en) * | 2018-07-02 | 2020-01-10 | 国网山东省电力公司潍坊供电公司 | Method for determining distribution points of newly-increased black start unit |
| CN110148972A (en) * | 2019-06-20 | 2019-08-20 | 华北电力大学（保定） | Extension black-start scheme determines method, apparatus and electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112288237A (en) * | 2020-10-12 | 2021-01-29 | 国网江苏省电力有限公司镇江供电分公司 | Black starter subregion partitioning method based on synergy optimization |
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