CN116316538A - Main-distribution cooperative distribution network power supply security capability analysis method, system, equipment and medium - Google Patents
Main-distribution cooperative distribution network power supply security capability analysis method, system, equipment and medium Download PDFInfo
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Abstract
The invention discloses a method, a system, equipment and a medium for analyzing the power supply security capability of a main-distribution cooperative distribution network, wherein the method comprises the following steps: splicing the main network model and the distribution network model to construct a main-distribution cooperative model; analyzing the area where the bus and the transformer substation are located, the load double electricity proportion and the loss load number according to the main-distribution coordination model, and calculating the reference risk value of the main-distribution coordination net rack of the bus and the transformer substation; according to preset reference risk value ranges of different main and auxiliary cooperative network racks and corresponding reference risk levels, determining the corresponding reference risk levels of the bus and the transformer substation by combining the calculated reference risk values of the bus and the main and auxiliary cooperative network racks of the transformer substation; and evaluating the power supply safety capability of the main-distribution cooperative distribution network according to the reference risk level corresponding to the bus and the transformer substation. The invention establishes the main and auxiliary power supply security standard of the distribution network matched with the power distribution network of the oversized city, improves the breadth and depth of the analysis of the main and auxiliary power supply security capability of the oversized city, and ensures that the analysis of the main and auxiliary power supply security capability of the distribution network is more accurate.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a method, a system, equipment and a medium for analyzing power supply security capability of a main-distribution cooperative distribution network.
Background
In recent years, urban distribution networks in China develop very rapidly, but the whole urban distribution networks are still in a transformation stage from high-speed extensive development to high-quality development. Various traditional grid evaluation indexes such as the distribution network rotatable power supply rate are obviously improved, but a certain gap still exists between the distribution network grid and the distribution automation practical level and the high power supply reliability requirement of the national center city. The problem that the power failure of the same-tower double-circuit lines of 10kV buses, 110kV and above transformer substations and 110kV is insufficient in power distribution network power supply conversion capacity is relatively outstanding, and the problem that the main distribution coordination support is weak is required to be compensated by a power distribution vehicle or a distribution network reverse power supply means.
International urban power grid power supply safety standards are important means for guiding planning and construction of power distribution networks. The current urban distribution network frame planning standard and the urban large power grid system power supply safety requirement have a certain gap, the existing distribution network power supply safety standard is not matched with the urban power distribution network, the analysis of the safety capability of the main distribution cooperation distribution network power supply is inaccurate, the actual safety capability is not met, the main distribution cooperation distribution network power conversion capability and the main distribution cooperation distribution network quick power conversion capability which directly reflect the main distribution cooperation distribution network frame and the distribution automation level are needed to be used as new boundary conditions for evaluating the distribution network power supply safety level, and the main distribution cooperation power supply safety standard and the power supply capability evaluation method of the urban medium-voltage distribution network are defined.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the method for analyzing the power supply security capability of the main-distribution cooperative distribution network, which has high accuracy and accords with the actual situation.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a power supply security capability analysis method of a main-distribution cooperative distribution network comprises the following steps:
splicing the main network model and the distribution network model to construct a main-distribution cooperative model;
analyzing the area where the bus and the transformer substation are located, the load double electricity proportion and the loss load number according to the main-distribution coordination model, and calculating the reference risk value of the main-distribution coordination net rack of the bus and the transformer substation;
according to preset reference risk value ranges of different main and auxiliary cooperative network racks and corresponding reference risk levels, determining the corresponding reference risk levels of the bus and the transformer substation by combining the calculated reference risk values of the bus and the main and auxiliary cooperative network racks of the transformer substation;
and evaluating the power supply safety capability of the main-distribution cooperative distribution network according to the reference risk level corresponding to the bus and the transformer substation.
Further, a main-distribution cooperative grid reference risk value E corresponding to the bus and the transformer substation i The calculation formula of (2) is as follows:
wherein B is b 、F b Respectively matching minimum load power restoration proportion and maximum loss load number reference values allowed in a cooperative power supply security capability standard table for a network distribution main; b (B) i 、F i The load re-electricity proportion and the loss load number after the corresponding re-electricity measures are implemented by bus or transformer substation faults or planned outage respectively; g i The fault probability of the transformer substation.
Further, the bus is a 10kV bus.
Further, the transformer substation is 110kV and above.
Further, the power supply security capability of the main-distribution cooperative distribution network is evaluated according to the reference risk level corresponding to the bus or the transformer substation, and the method further comprises the following steps:
and analyzing the power distribution network power restoration capability of the bus or the substation in a first preset time period and a second preset time period after the total station voltage loss.
Further, the method further comprises the following steps:
after the N-1 fault, the N-1-1 fault or the planned outage of the main network equipment is calculated, the minimum load proportion of normal power supply can be recovered after corresponding power restoration measures are implemented in a first preset time period and a second preset time period.
In order to achieve the above object, the present invention further provides a power supply security capability analysis system of a main-distribution collaborative distribution network for the above method, including:
the main-match cooperative model splicing module is used for splicing the main-match cooperative models;
the main-distribution cooperative network frame reference risk calculation module is used for analyzing loss loads and proportions corresponding to the voltage loss of the bus and the transformer substation according to the main-distribution cooperative model and calculating main-distribution cooperative network frame reference risk values of the bus and the transformer substation;
the reference risk level determining module is used for determining the reference risk level corresponding to the bus and the transformer substation according to the preset reference risk value ranges of different main-distribution cooperative network racks and the corresponding reference risk levels and by combining the calculated main-distribution cooperative network rack reference risk values;
and the power supply security capability evaluation module of the main-distribution cooperative distribution network is used for evaluating the power supply security capability of the main-distribution cooperative distribution network according to the reference risk levels corresponding to the bus and the transformer substation.
To achieve the above object, the present invention additionally provides a computer device comprising a memory storing a computer program and a processor implementing the steps of the above method when the processor executes the computer program.
To achieve the above object, the present invention additionally provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above method.
Compared with the prior art, the technical scheme has the following principle and advantages:
according to the technical scheme, the main-distribution coordination grid frame reference risk value of the bus and the transformer substation is calculated by analyzing the area, the load re-electricity proportion and the loss load number of the bus and the transformer substation according to the main-distribution coordination model; according to preset reference risk value ranges of different main and auxiliary cooperative network racks and corresponding reference risk levels, determining the corresponding reference risk levels of the bus and the transformer substation by combining the calculated reference risk values of the bus and the main and auxiliary cooperative network racks of the transformer substation; and finally, evaluating the power supply safety capability of the main-distribution cooperative distribution network according to the reference risk level corresponding to the bus and the transformer substation. The technical scheme improves the breadth and depth of analysis of the power supply security capability of the main distribution coordination network of the oversized city, and the analysis of the power supply security capability of the main distribution coordination network is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the services required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the figures in the following description are only some embodiments of the present invention, and that other figures can be obtained according to these figures without inventive effort to a person skilled in the art.
Fig. 1 is a schematic flow chart of a power supply security capability analysis method of a main-distribution cooperative distribution network according to an embodiment of the present invention;
fig. 2 is a connection block diagram of a power supply security capability analysis system of a main-distribution cooperative distribution network according to an embodiment of the present invention;
fig. 3 is an internal structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The invention is further described in connection with the following embodiments:
as shown in fig. 1, the method for analyzing the power supply security capability of the main-distribution cooperative distribution network according to the embodiment includes the following steps:
s1, splicing a main network model and a distribution network model to construct a main-distribution cooperation model;
s2, analyzing the area, the load re-electricity proportion and the loss load number of the bus and the transformer substation according to the main-distribution cooperative model, and calculating the main-distribution cooperative net rack reference risk value of the bus and the transformer substation;
s3, determining the corresponding reference risk levels of the bus and the transformer substation according to the preset reference risk value ranges of different main and auxiliary cooperative network racks and the corresponding reference risk levels, and combining the calculated reference risk values of the bus and the main and auxiliary cooperative network racks of the transformer substation;
and S4, evaluating the power supply safety capability of the main-distribution cooperative distribution network according to the reference risk level corresponding to the bus and the transformer substation.
Specifically, in step S1 of the present embodiment,
and dividing the distribution network model into a distribution network medium-voltage model and a distribution network low-voltage model. Then, splicing by adopting a main network model, a distribution network medium-voltage model and a distribution network low-voltage model, wherein the method specifically comprises the following steps:
carrying out main-distribution boundary analysis on the main network model and the distribution network medium-voltage model to obtain a corresponding main-distribution boundary mapping relation; performing medium-low boundary analysis on the distribution network medium-voltage model and the distribution network low-voltage model to obtain a corresponding distribution network medium-low voltage boundary mapping relation; and performing main-distribution splicing according to the main network model, the distribution network medium-voltage model, the distribution network low-voltage model, the main-distribution boundary mapping relation and the distribution network medium-low-voltage boundary mapping relation, so as to obtain a main-distribution cooperative model.
Specifically, in the embodiment, aiming at the main-distribution coordination model, the reference risk value of the main-distribution coordination grid frame problem is evaluated from three dimensions of a region where a 10kV bus or a 110kV transformer substation or above is located, a load double-electricity proportion, a loss load number and the like. And then according to the corresponding relation between the reference risk value ranges of different main and auxiliary cooperative network racks and the corresponding reference risk levels, the corresponding reference risk level of the bus or the transformer substation can be determined, so that the power supply safety capability of the main and auxiliary cooperative network is evaluated. The distribution network power supply safety standard matched with the ultra-large urban distribution network is established, the analysis breadth and depth of the operation mode profession of the distribution network system are improved, the planning participation degree of the distribution network grid structure is enhanced, the distribution network is ensured to safely, reliably, economically and high-quality operation, and a user can know the feeder power supply safety capability more intuitively. The embodiment also researches the minimum load proportion of normal power supply after N-1/N-1-1 faults or planned outage of the main network equipment are researched by implementing corresponding power restoration measures within a specific time period (second level, minute level, hour level and planned outage) based on fusion of the topology models of the main network and the distribution network and the power grid equipment level condition.
In one embodiment, according to the main-distribution coordination model, the areas of the buses and the substations, the load re-electricity proportion and the loss load number are analyzed, and the formulas for calculating the reference risk values of the main-distribution coordination network racks of the buses and the substations are as follows:
wherein B is b 、F b Respectively matching minimum load power restoration proportion and maximum loss load number reference values allowed in a cooperative power supply security capability standard table for a network distribution main; b (B) i 、F i The load re-electricity proportion and the loss load number after the corresponding re-electricity measures are implemented by bus or transformer substation faults or planned outage respectively; g i G is the fault probability of the transformer substation when only one path of 110kV power supply exists i Taking 1.5, when two paths of 110kV power supplies are arranged on the same tower, G i 1.2, other cases, G i Taking 1.0.
The distribution network main distribution cooperative power supply security capability standard table is shown in the following table 1:
TABLE 1
In one embodiment, the reference risk level corresponding to the bus or the transformer substation is determined according to the preset reference risk value range of the different main-distribution cooperative network frame and the corresponding reference risk level and the calculated reference risk value of the bus and the transformer substation main-distribution cooperative network frame; wherein, the liquid crystal display device comprises a liquid crystal display device,
the main and matched collaborative grid standard risk classification comprises the following steps:
bus failure or planned outages. The standard risk of the bus main-auxiliary cooperative basic net rack and the three-remote net rack is divided into the risks of class I, class II, class III, class IV and class V, and the risk grading conditions are shown in the following table 2:
TABLE 2
Substation faults or planned outages. The basic risk of the main and auxiliary cooperative basic network frame and the three-remote network frame of the transformer substation is divided into the risks of class I, class II, class III, class IV and class V, and the risk grading conditions are shown in the following table 3: .
TABLE 3 Table 3
In one embodiment, the bus bar is a 10kV bus bar.
In one embodiment, the substation is a 110kV and above substation.
In one embodiment, the evaluating the power supply security capability of the main-distribution cooperative distribution network according to the reference risk level of the bus or the substation further includes:
and analyzing the power distribution network power restoration capability of the bus or the substation in a first preset time period and a second preset time period after the total station voltage loss.
Specifically, the power distribution network recovery capacity of 15 minutes and 3 hours of 10kV bus voltage loss and 110kV and above substation total station voltage loss is analyzed according to the areas of A+ area, A area, B area and C area, wherein 15 minutes is a first preset time period, and 3 hours is a second preset time period. From three dimensions of a 10kV bus or a 110kV transformer substation area, a load double electricity proportion, a maximum loss load number and the like, the reference risk value of the main-distribution cooperative network frame problem is evaluated, and the calculation formula is as follows:
wherein B is b 、F b Respectively matching minimum load power restoration proportion and maximum loss load number reference values allowed in a cooperative power supply security capability standard table for a network distribution main; b (B) i 、F i The load re-electricity proportion and the loss load number after the corresponding re-electricity measures are implemented by bus or transformer substation faults or planned outage respectively; g i The fault probability of the transformer substation.
In one embodiment, further comprising:
after the N-1 fault, the N-1-1 fault or the planned outage of the main network equipment is calculated, the minimum load proportion of normal power supply can be recovered after corresponding power restoration measures are implemented in a first preset time period and a second preset time period.
Specifically, the invention researches the minimum load proportion of normal power supply after N-1/N-1-1 faults or planned outage of main network equipment occur based on fusion of the topology model of the main distribution network and the power grid equipment level condition, and the corresponding power restoration measures are implemented within a specific time period (second level, minute level, hour level and planned outage). Various mining statistics and automatic mapping display can be further carried out on analysis results.
As shown in fig. 2, this embodiment further provides a power supply security capability analysis system of a main-distribution cooperative distribution network, including:
a main-match collaborative model splicing module 201, configured to splice main-match collaborative models;
the main-distribution cooperative network frame reference risk calculation module 202 is used for analyzing loss loads and proportions corresponding to the voltage loss of the bus and the transformer substation according to the main-distribution cooperative model and calculating main-distribution cooperative network frame reference risk values of the bus and the transformer substation;
the reference risk level determining module 203 is configured to determine, according to preset reference risk value ranges of different main-distribution cooperative network racks and corresponding reference risk levels, reference risk levels corresponding to the bus and the transformer substation by combining the calculated main-distribution cooperative network rack reference risk values;
the power supply security capability evaluation module 204 of the main-distribution cooperative distribution network is configured to evaluate the power supply security capability of the main-distribution cooperative distribution network according to the reference risk levels corresponding to the bus and the transformer substation.
The specific limitation of the power supply security capability analysis system of the main-distribution cooperative distribution network can be referred to the limitation of the power supply security capability analysis method of the main-distribution cooperative distribution network, and is not repeated herein. All or part of each module in the main-distribution cooperative distribution network power supply security capability analysis system can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 3. The computer device includes a processor a01, a network interface a02, a memory (not shown) and a database (not shown) connected by a system bus. Wherein the processor a01 of the computer device is adapted to provide computing and control capabilities. The memory of the computer device includes internal memory a03 and nonvolatile storage medium a04. The nonvolatile storage medium a04 stores an operating system B01, a computer program B02, and a database (not shown in the figure). The internal memory a03 provides an environment for the operation of the operating system B01 and the computer program B02 in the nonvolatile storage medium a04. The database of the computer device is used for storing data such as advertisement pictures and parameters of the advertisement pictures. The network interface a02 of the computer device is used for communication with an external terminal through a network connection. The computer program B02 is executed by the processor A01 to realize a main-distribution cooperative distribution network power supply security capability analysis method.
It will be appreciated by those skilled in the art that the structure shown in fig. 3 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of: calculating a main-distribution cooperative grid reference risk value corresponding to a bus or a transformer substation according to the load re-electricity proportion and the maximum loss load number of the bus or the transformer substation after the voltage loss and through corresponding re-electricity means; determining the corresponding reference risk level of the bus or the transformer substation according to the preset reference risk value ranges of different main-distribution cooperative network racks and the corresponding reference risk level; and evaluating the power supply safety capability of the main-distribution cooperative distribution network according to the reference risk level of the bus or the transformer substation.
In one embodiment, according to the main-distribution coordination model, analyzing the area where the bus and the transformer substation are located, the load re-electricity proportion and the loss load number, and calculating the reference risk value of the main-distribution coordination net rack of the bus and the transformer substation by the following calculation formula:
wherein B is b 、F b Respectively matching minimum load power restoration proportion and maximum loss load number reference values allowed in a cooperative power supply security capability standard table for a network distribution main; b (B) i 、F i The load re-electricity proportion and the loss load number after the corresponding re-electricity measures are implemented by bus or transformer substation faults or planned outage respectively; g i The fault probability of the transformer substation.
In one embodiment, the bus bar is a 10kV bus bar.
In one embodiment, the substation is a 110kV and above substation.
In one embodiment, the evaluating the power supply security capability of the main-distribution cooperative distribution network according to the reference risk level of the bus or the substation further includes:
and analyzing the power distribution network power restoration capability of the bus or the substation in a first preset time period and a second preset time period after the total station voltage loss.
In one embodiment, further comprising:
after the N-1 fault, the N-1-1 fault or the planned outage of the main network equipment is calculated, the minimum load proportion of normal power supply can be recovered after corresponding power restoration measures are implemented in a first preset time period and a second preset time period.
In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the steps of the above-described power security capability analysis method for a main-distribution co-distribution network.
It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so variations in shape and principles of the present invention should be covered.
Claims (9)
1. The method for analyzing the power supply security capability of the main-distribution cooperative distribution network is characterized by comprising the following steps of:
splicing the main network model and the distribution network model to construct a main-distribution cooperative model;
analyzing the area where the bus and the transformer substation are located, the load double electricity proportion and the loss load number according to the main-distribution coordination model, and calculating the reference risk value of the main-distribution coordination net rack of the bus and the transformer substation;
according to preset reference risk value ranges of different main and auxiliary cooperative network racks and corresponding reference risk levels, determining the corresponding reference risk levels of the bus and the transformer substation by combining the calculated reference risk values of the bus and the main and auxiliary cooperative network racks of the transformer substation;
and evaluating the power supply safety capability of the main-distribution cooperative distribution network according to the reference risk level corresponding to the bus and the transformer substation.
2. The method for analyzing the power supply safety capability of the main-distribution cooperative distribution network according to claim 1, wherein the main-distribution cooperative distribution network reference risk value E corresponding to the bus and the transformer substation is characterized in that i The calculation formula of (2) is as follows:
wherein B is b 、F b Respectively matching minimum load power restoration proportion and maximum loss load number reference values allowed in a cooperative power supply security capability standard table for a network distribution main; b (B) i 、F i The load re-electricity proportion and the loss load number after the corresponding re-electricity measures are implemented by bus or transformer substation faults or planned outage respectively; g i The fault probability of the transformer substation.
3. The method for analyzing the power supply safety capability of the main-distribution cooperative distribution network according to claim 1, wherein the bus is a 10kV bus.
4. The method for analyzing the power supply security capability of the main-distribution collaborative distribution network according to claim 1, wherein the transformer substation is 110kV and above.
5. The method for analyzing the power supply security capability of the main-distribution cooperative distribution network according to claim 1, wherein the power supply security capability of the main-distribution cooperative distribution network is evaluated according to a reference risk level corresponding to a bus or a transformer substation, and the method further comprises:
and analyzing the power distribution network power restoration capability of the bus or the substation in a first preset time period and a second preset time period after the total station voltage loss.
6. The method for analyzing power supply security capability of a main-distribution cooperative distribution network according to claim 1, further comprising:
after the N-1 fault, the N-1-1 fault or the planned outage of the main network equipment is calculated, the minimum load proportion of normal power supply can be recovered after corresponding power restoration measures are implemented in a first preset time period and a second preset time period.
7. The utility model provides a main join in marriage cooperation and join in marriage net power supply security capability analysis system which characterized in that includes:
the main-match cooperative model splicing module is used for splicing the main-match cooperative models;
the main-distribution cooperative network frame reference risk calculation module is used for analyzing loss loads and proportions corresponding to the voltage loss of the bus and the transformer substation according to the main-distribution cooperative model and calculating main-distribution cooperative network frame reference risk values of the bus and the transformer substation;
the reference risk level determining module is used for determining the reference risk level corresponding to the bus and the transformer substation according to the preset reference risk value ranges of different main-distribution cooperative network racks and the corresponding reference risk levels and by combining the calculated main-distribution cooperative network rack reference risk values;
and the power supply security capability evaluation module of the main-distribution cooperative distribution network is used for evaluating the power supply security capability of the main-distribution cooperative distribution network according to the reference risk levels corresponding to the bus and the transformer substation.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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