A method for evaluating the impact range of power outages based on power grid diagram

Abstract

The present invention provides a method for evaluating the impact range of a power outage based on a power grid diagram, which belongs to the technical field of power systems, and specifically comprises: obtaining the deviation between historical power consumption data of power users within the power outage impact range of different similar distribution equipment and historical operation data of similar distribution equipment, and determining, in combination with the equipment similarity of different similar distribution equipment, that when the recognition accuracy rate does not meet the requirement, a suspected problem circuit topology is determined based on the historical power consumption data of power users of a downstream circuit topology, and an initial power outage impact range is corrected based on adjacent distribution equipment of the suspected problem circuit topology to obtain the power outage impact range, thereby ensuring the accuracy of the determination of the power outage impact range.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power systems, and in particular relates to a method for evaluating a power outage impact range based on a power grid diagram. Background Art

[0002] As the power supply topology of the power system becomes increasingly large, the determination of the impact range of power outages during maintenance of power equipment has become more complicated. Therefore, how to determine the impact range of power outages and improve the power reliability of power users has become a technical problem that needs to be solved urgently.

[0003] In order to solve the above technical problems, the existing technical solutions realize intelligent analysis and visualization of user-level power outage scope analysis based on GIS and power grid topology, which improves the accuracy and efficiency of the analysis and processing of the power outage impact scope. However, the following technical problems still exist:

[0004] When determining the scope of the power outage, due to the update cycle of the power grid diagram, the power grid diagram may not truly reflect the actual power supply topology. Therefore, when conducting a power outage analysis, if the power consumption data of power users and the power distribution data of power equipment cannot be combined, it is impossible to accurately evaluate the scope of the power outage.

[0005] In response to the above technical problems, the present invention provides a method for evaluating the impact range of a power outage based on a power grid diagram. Summary of the invention

[0006] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0007] In order to solve the above technical problems, the present invention provides a method for evaluating the impact range of power outage based on a power grid diagram, which specifically includes:

[0008] S1 determines the initial power outage impact range based on the position of the power outage assessment device in the power grid map, and when the recognition accuracy of the initial power outage impact range is determined to be abnormal through the historical power consumption data of the power users in the initial power outage impact range and the historical operation data of the power outage assessment device, proceeds to the next step;

[0009] S2 determines the downstream circuit topology of the power outage assessment device using the positioning result of the power outage assessment device, and determines similar power distribution devices and device similarity of the power outage assessment device in combination with historical power consumption data of different power users with different downstream circuit topologies and similar situations of power equipment;

[0010] S3 obtains the deviation between the historical power consumption data of power users in the power outage impact range of different similar power distribution equipment and the historical operation data of similar power distribution equipment, and determines that when the recognition accuracy rate does not meet the requirement in combination with the equipment similarity of different similar power distribution equipment, proceeds to the next step;

[0011] S4 determines the suspected problem circuit topology according to the historical power consumption data of the power users of the downstream circuit topology, and corrects the initial power outage impact range based on the adjacent power distribution equipment of the suspected problem circuit topology to obtain the power outage impact range.

[0012] The beneficial effects of the present invention are:

[0013] 1. Determine whether there is any abnormality in the recognition accuracy of the initial power outage impact range through the historical power consumption data of power users in the initial power outage impact range and the historical operation data of the power outage assessment equipment, thereby realizing the evaluation of the recognition accuracy of the initial power outage impact range from the perspective of the deviation between the power consumption data and the power transmission amount of the power outage assessment equipment, avoiding the occurrence of technical problems such as the recognition accuracy not meeting the requirements due to abnormal circuit topology, and improving the accuracy of the assessment of the power outage impact range.

[0014] 2. The initial power outage impact range is corrected based on the adjacent distribution equipment of the suspected problem circuit topology to obtain the power outage impact range. Not only the evaluation efficiency of the power outage impact range is improved by screening the suspected problem circuit topology, but also by further combining the adjacent distribution equipment, a secondary screening of the power outage impact range is achieved from the perspective of the gap in the amount of transmitted electricity and the similarity of the electricity consumption of the adjacent distribution equipment, thereby ensuring the accuracy of the assessment of the power outage range.

[0015] A further technical solution is that the power outage assessment device is an electric power device to be shut down for maintenance or an electric power device that has a power outage failure.

[0016] A further technical solution is that the method for determining the impact range of the initial power outage is:

[0017] A downstream circuit topology of the power outage assessment device is determined according to the position of the power outage assessment device in the power grid map, and the impact range of the initial power outage is determined using connected power users of the downstream circuit topology.

[0018] A further technical solution is that the historical electricity consumption data of the electricity user includes the historical electricity consumption of the electricity user at different time periods on different dates.

[0019] A further technical solution is that the historical operation data includes historical power transmission of the power outage assessment device at different time periods on different dates.

[0020] A further technical solution is that the method for determining the suspected problematic circuit topology is:

[0021] Determine the power consumption of the power users of the downstream circuit topology on different dates based on the historical power consumption data of the power users of the downstream circuit topology, and determine the deviation amount on different dates in combination with the historical power transmission amount of the downstream circuit topology on different dates;

[0022] The power deviation date is determined by the deviation amount of different dates, and the number of the power deviation date is used to determine the suspected problem circuit topology.

[0023] A further technical solution is to use the number of power deviation dates to determine the suspected problem circuit topology, specifically including:

[0024] The downstream circuit topology whose number of power deviation dates does not meet the requirement is regarded as a suspected problematic circuit topology.

[0025] A further technical solution is that the adjacent power distribution equipment is a distribution transformer.

[0026] A further technical solution is that the method for determining the power outage impact range is:

[0027] Obtaining the power consumption of the power users of the suspected problematic circuit topology on different dates, and determining the transmission power consumption deviation of the suspected problematic circuit topology on different dates in combination with the historical transmission power of the suspected problematic circuit topology on different dates;

[0028] Based on the transmission power deviation of the suspected problem circuit topology on different dates and the historical transmission power of different adjacent distribution equipment on different dates, the matching coefficient between the historical transmission power of different adjacent distribution equipment and the suspected problem circuit topology is determined, and the matching power equipment of different suspected problem circuit topologies is determined using the matching coefficient;

[0029] The power outage impact range is determined by using the power supply range of the matching power equipment of different suspected problem circuit topologies and the initial power outage impact range.

[0030] A further technical solution is that the matching coefficient between the historical power transmission of the adjacent distribution equipment and the suspected problematic circuit topology is determined based on the average value of the deviation ratio between the power transmission deviation of the suspected problematic circuit topology on different dates and the historical power transmission of the adjacent distribution equipment.

[0031] Other features and advantages will be described in the following description, and partly become apparent from the description, or understood by practicing the invention. The purpose and other advantages of the invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0034] Figure 1 It is a flow chart of a method for assessing the impact range of a power outage based on a power grid diagram;

[0035] Figure 2 is a flow chart of a method for determining similar power distribution equipment of a power outage assessment device;

[0036] Figure 3 is a flow chart of a method for determining a suspected problem circuit topology;

[0037] Figure 4 It is a flow chart of a method for determining the scope affected by a power outage. DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0039] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0040] To solve the above problems, according to one aspect of the present invention, Figure 1 According to one aspect of the present invention, a method for evaluating the impact range of a power outage based on a power grid diagram is provided, specifically comprising:

[0041] S1 determines the initial power outage impact range based on the position of the power outage assessment device in the power grid map, and when the recognition accuracy of the initial power outage impact range is determined to be abnormal through the historical power consumption data of the power users in the initial power outage impact range and the historical operation data of the power outage assessment device, proceeds to the next step;

[0042] S2 determines the downstream circuit topology of the power outage assessment device using the positioning result of the power outage assessment device, and determines similar power distribution devices and device similarity of the power outage assessment device in combination with historical power consumption data of different power users with different downstream circuit topologies and similar situations of power equipment;

[0043] S3 obtains the deviation between the historical power consumption data of power users in the power outage impact range of different similar power distribution equipment and the historical operation data of similar power distribution equipment, and determines that when the recognition accuracy rate does not meet the requirement in combination with the equipment similarity of different similar power distribution equipment, proceeds to the next step;

[0044] S4 determines the suspected problem circuit topology according to the historical power consumption data of the power users of the downstream circuit topology, and corrects the initial power outage impact range based on the adjacent power distribution equipment of the suspected problem circuit topology to obtain the power outage impact range.

[0045] Furthermore, the power outage assessment device is an electric power device to be shut down for maintenance or an electric power device that has a power outage failure.

[0046] It should be noted that the method for determining the impact range of the initial power outage is:

[0047] A downstream circuit topology of the power outage assessment device is determined according to the position of the power outage assessment device in the power grid map, and the impact range of the initial power outage is determined using connected power users of the downstream circuit topology.

[0048] It can be understood that the historical electricity consumption data of the electricity user includes the historical electricity consumption of the electricity user at different time periods on different dates.

[0049] It should also be noted that the historical operation data includes the historical power transmission of the power outage assessment device at different time periods on different dates.

[0050] Furthermore, there are anomalies in the accuracy of identifying the impact range of the initial power outage, including:

[0051] Determine the historical power consumption of different power users at different time periods on different dates based on the historical power consumption data of power users within the scope of the initial power outage, and determine the transmission power deviation at different time periods on different dates in combination with the historical transmission power of the power outage assessment device at different time periods on different dates;

[0052] Determine the comprehensive deviation amount of different dates by using the transmission power deviation amount of different time periods, and determine the deviation date by using the comprehensive deviation amount;

[0053] The recognition accuracy of the initial power outage impact range is determined based on the number of deviation dates and the comprehensive deviation amounts of different deviation dates, and whether there is an abnormality in the recognition accuracy of the initial power outage impact range is determined based on a preset accuracy threshold.

[0054] It should be noted that determining whether there is an abnormality in the recognition accuracy of the initial power outage impact range based on a preset accuracy threshold specifically includes:

[0055] When the recognition accuracy of the initial power outage impact range is less than the preset accuracy threshold, it is determined that there is an abnormality in the recognition accuracy of the initial power outage impact range.

[0056] In another possible embodiment, the accuracy of determining the impact range of the initial power outage is abnormal, specifically including:

[0057] S11 determines the historical power consumption of different power users at different time periods on different dates based on the historical power consumption data of power users within the scope of the initial power outage, determines the transmission power deviation at different time periods on different dates in combination with the historical power transmission of the power outage assessment device at different time periods on different dates, and determines the deviation time period using the transmission power deviation;

[0058] S12: determining the comprehensive deviation amount of different dates based on the number of deviation periods on different dates and the transmission power deviation amount of different deviation periods, and determining the deviation date using the comprehensive deviation amount;

[0059] S13 determines the recognition accuracy of the initial power outage impact range according to the number of deviation dates and the comprehensive deviation amounts of different deviation dates, and determines whether the recognition accuracy of the initial power outage impact range meets the requirements based on a preset accuracy threshold.

[0060] Optionally, the above step S11 includes the following contents:

[0061] S111 determines the historical power consumption of different power users at different time periods on different dates based on the historical power consumption data of the power users within the initial power outage impact range, and determines the transmission power deviation at different time periods on different dates in combination with the historical power transmission of the power outage assessment device at different time periods on different dates, and determines whether there is a deviation period based on the transmission power deviation, if so, proceeds to the next step, if not, determines that there is no abnormality in the recognition accuracy of the initial power outage impact range;

[0062] S112 determines whether the number of the deviation time periods meets the requirement, if yes, proceeds to the next step, if no, proceeds to step S12;

[0063] S113 determines whether there is a date where the number of deviation periods does not meet the requirement according to the number of deviation periods on different dates, and if so, proceeds to the next step, and if not, determines that there is no abnormality in the recognition accuracy of the initial power outage impact range;

[0064] S114 uses the number of deviation time periods of different dates to determine the screening deviation dates, and determines whether the number of the screening deviation dates meets the requirements. If so, enter step S12. If not, determine that there is no abnormality in the recognition accuracy of the initial power outage impact range.

[0065] Optionally, the above step S12 includes the following contents:

[0066] Based on the number of deviation time periods on different dates and the transmission power deviation amounts in different deviation time periods, the comprehensive deviation amounts for different dates are determined, and the deviation dates are determined using the comprehensive deviation amounts to determine whether the number of deviation dates meets the requirements. If so, proceed to the next step; if not, determine whether there is any abnormality in the recognition accuracy of the initial power outage impact range.

[0067] Specifically, Figure 2 As shown, the method for determining similar power distribution equipment of the power outage assessment device is:

[0068] Determine the basic similarity between the power outage assessment device and different power devices in the power grid diagram based on the device type of the power outage assessment device and the historical power transmission amount at different time periods on different dates, and use the basic similarity to screen suspected similar power devices;

[0069] Determine the topological similarity between the power outage assessment device and the suspected similar power devices based on the downstream circuit topology of the power outage assessment device, and determine similar assessment devices among the suspected similar power devices using the topological similarity;

[0070] Determine the similarity of the topological circuit structure of the power outage assessment device in different downstream circuit topologies with that of the similar assessment device through the historical power consumption data of the power equipment in different downstream circuit topologies and different power users of the power outage assessment device;

[0071] The device similarity of different similar evaluation devices is determined based on the topological circuit structure similarity, topological similarity and basic similarity between different downstream circuit topologies and the similar evaluation devices, and the device similarity is used to determine the similar distribution equipment of the power outage evaluation device.

[0072] Further, using the device similarity to determine similar power distribution equipment to the power outage assessment device specifically includes:

[0073] Similar evaluation equipment that meets the equipment similarity requirements is regarded as similar power distribution equipment.

[0074] In another possible embodiment, the method for determining similar power distribution equipment of the power outage assessment device is:

[0075] S21 determines the basic similarity between the power outage assessment device and different power devices in the power grid diagram based on the device type of the power outage assessment device and the historical power transmission volume at different time periods on different dates;

[0076] S22 determines the similarity of the topological circuit structure of the power outage assessment device in different downstream circuit topologies with the similar assessment device through the historical power consumption data of the power equipment in different downstream circuit topologies and different power users of the power outage assessment device;

[0077] S23 determines the device similarity of different similar evaluation devices according to the topological circuit structure similarity, topological similarity and basic similarity of the similar evaluation devices in different downstream circuit topologies, and uses the device similarity to determine similar distribution devices of the power outage evaluation device.

[0078] Optionally, the above step S21 includes the following contents:

[0079] S211 determines whether the equipment type of the power equipment in the power grid diagram is similar to the equipment type of the power outage assessment device based on the equipment type of the power outage assessment device, if so, proceeds to the next step, if not, determines that the power equipment does not belong to similar power distribution equipment;

[0080] S212 determines the number of downstream circuit topologies of the power outage assessment device based on the downstream circuit topology of the power outage assessment device, and determines whether the device type of the power device in the power grid diagram is similar to the device type of the power outage assessment device based on the number of downstream circuit topologies, if so, proceeds to the next step, if not, determines that the power device does not belong to similar power distribution equipment;

[0081] S213 determines the basic similarity between the power outage assessment device and different power equipment in the power grid diagram based on the equipment type of the power outage assessment device and the historical power transmission volume at different time periods on different dates, and judges whether the basic similarity of the power equipment in the power grid diagram meets the requirements. If so, proceeds to step S22; if not, determines that the power equipment does not belong to similar distribution equipment.

[0082] Optionally, the above step S22 includes the following contents:

[0083] S221 determines the similarity of the topological circuit structure of the power outage assessment device in different downstream circuit topologies with that of the similar assessment device through the historical power consumption data of the power equipment in different downstream circuit topologies and different power users of the power outage assessment device, and judges whether the power equipment in the power grid diagram has a downstream circuit topology whose topological circuit structure similarity meets the requirements, if so, proceeds to the next step, if not, determines that the power equipment does not belong to similar power distribution equipment;

[0084] S222 determines whether the proportion of the number of downstream circuit topologies that meet the requirements of topological circuit structure similarity meets the requirements. If so, enter step S23. If not, determine that the power equipment does not belong to similar distribution equipment.

[0085] It should be noted that determining that the recognition accuracy rate does not meet the requirements specifically includes:

[0086] Determine the transmission power deviation amount at different time periods on different dates based on the deviation amount of historical power consumption data of power users in the power outage impact range of similar power distribution equipment and historical operation data of similar power distribution equipment, and determine the line loss deviation amount based on the deviation of the transmission power deviation amount between different similar power distribution equipment and the power outage assessment equipment at different time periods on different dates;

[0087] Determine the comprehensive deviation of line losses of different similar power distribution equipment on different dates by using the line loss deviation in different time periods, and determine the deviation line loss date of different similar power distribution equipment based on the comprehensive deviation of line loss;

[0088] Determine the deviation impact values ​​of different similar power distribution equipment using the comprehensive deviation of line loss on different deviation line loss dates and the equipment similarity, and determine the abnormal probability of the recognition accuracy of the power outage assessment device based on the deviation impact values ​​of different similar power distribution equipment;

[0089] Based on the abnormal probability, it is determined whether the recognition accuracy of the power outage assessment device meets the requirement.

[0090] Further, determining whether the recognition accuracy of the power outage assessment device meets the requirement based on the abnormal probability specifically includes:

[0091] When the abnormal probability of the recognition accuracy of the power outage assessment device is not within a preset abnormal probability interval, it is determined that the recognition accuracy of the power outage assessment device does not meet the requirement.

[0092] In another possible embodiment, determining that the recognition accuracy rate does not meet the requirement specifically includes:

[0093] Determine the transmission power deviation amount at different time periods on different dates based on the deviation amount of historical power consumption data of power users within the power outage impact range of similar power distribution equipment and the historical operation data of similar power distribution equipment, and determine the line loss deviation amount based on the deviation of the transmission power deviation amount between different similar power distribution equipment and the power outage assessment equipment at different time periods on different dates, determine the line loss deviation time period based on the line loss deviation amount, screen the deviation-similar power distribution equipment based on the number of line loss deviation time periods, and judge whether the number of screened deviation-similar power distribution equipment meets the requirement, if so, proceed to the next step, if not, determine that the recognition accuracy rate does not meet the requirement;

[0094] The date when the number of line loss deviation periods is greater than the number of preset periods is used as the screening deviation date, and the number of screening deviation dates is used to determine the deviation distribution equipment among the similar distribution equipment, and whether the number of the deviation distribution equipment meets the requirement is judged, if so, proceed to the next step, if not, it is determined that the recognition accuracy rate does not meet the requirement;

[0095] Determine the comprehensive deviation of line losses of different similar power distribution equipment on different dates by using the line loss deviation in different time periods and the number of the line loss deviation time periods, and determine the deviation line loss dates of different similar power distribution equipment based on the comprehensive line loss deviation, and judge whether the number of similar power distribution equipment whose number of deviation line loss dates does not meet the requirement meets the requirement, if so, proceed to the next step, if not, determine that the recognition accuracy rate does not meet the requirement;

[0096] Determine the deviation impact values ​​of different similar power distribution equipment using the comprehensive deviation of line loss on different deviation line loss dates and the similarity of equipment, and determine the number of screened deviation equipment in the similar power distribution equipment using the deviation impact value, and judge whether the number of screened deviation equipment in the similar power distribution equipment meets the requirement, if so, proceed to the next step, if not, determine that the recognition accuracy rate does not meet the requirement;

[0097] The abnormal probability of the recognition accuracy of the power outage assessment device is determined based on the deviation influence values ​​of different similar power distribution devices, and whether the recognition accuracy of the power outage assessment device meets the requirements is determined based on the abnormal probability.

[0098] Further, when the line loss deviation amount in the time period does not meet the requirement, the time period is determined to be a line loss deviation time period.

[0099] Specifically, Figure 3 As shown, the method for determining the suspected problem circuit topology is:

[0100] Determine the power consumption of the power users of the downstream circuit topology on different dates based on the historical power consumption data of the power users of the downstream circuit topology, and determine the deviation amount on different dates in combination with the historical power transmission amount of the downstream circuit topology on different dates;

[0101] The power deviation date is determined by the deviation amount of different dates, and the number of the power deviation date is used to determine the suspected problem circuit topology.

[0102] Further, the number of the power deviation dates is used to determine the suspected problem circuit topology, specifically including:

[0103] The downstream circuit topology whose number of power deviation dates does not meet the requirement is regarded as a suspected problematic circuit topology.

[0104] It should be noted that the adjacent power distribution equipment is a distribution transformer.

[0105] Specifically, Figure 4 As shown, the method for determining the power outage impact range is:

[0106] Obtaining the power consumption of the power users of the suspected problematic circuit topology on different dates, and determining the transmission power consumption deviation of the suspected problematic circuit topology on different dates in combination with the historical transmission power of the suspected problematic circuit topology on different dates;

[0107] Based on the transmission power deviation of the suspected problem circuit topology on different dates and the historical transmission power of different adjacent distribution equipment on different dates, the matching coefficient between the historical transmission power of different adjacent distribution equipment and the suspected problem circuit topology is determined, and the matching power equipment of different suspected problem circuit topologies is determined using the matching coefficient;

[0108] The power outage impact range is determined by using the power supply range of the matching power equipment of different suspected problem circuit topologies and the initial power outage impact range.

[0109] It can be understood that the matching coefficient between the historical power transmission of the adjacent distribution equipment and the suspected problematic circuit topology is determined based on the average value of the deviation ratio between the power transmission deviation of the suspected problematic circuit topology on different dates and the historical power transmission of the adjacent distribution equipment.

[0110] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0111] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0112] The above description is only one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of this specification.

Claims

1. A method for assessing the impact range of a power outage based on a power grid diagram, specifically comprising: Determine the initial power outage impact range based on the position of the power outage assessment device in the power grid map, and when the recognition accuracy of the initial power outage impact range is determined to be abnormal through the historical power consumption data of the power users in the initial power outage impact range and the historical operation data of the power outage assessment device, proceed to the next step; Determine the downstream circuit topology of the power outage assessment device by using the positioning result of the power outage assessment device, and determine similar power distribution devices and device similarity of the power outage assessment device in combination with historical power consumption data of different power users of different downstream circuit topologies of different power devices in the power grid diagram and similar situations of power devices; Obtain the deviation between the historical power consumption data of power users in the power outage impact range of different similar power distribution equipment and the historical operation data of similar power distribution equipment, and determine that when the recognition accuracy rate does not meet the requirements in combination with the equipment similarity of different similar power distribution equipment, proceed to the next step; Determine the suspected problem circuit topology according to the historical power consumption data of the power users of the downstream circuit topology, and correct the initial power outage impact range based on the adjacent power distribution equipment of the suspected problem circuit topology to obtain the power outage impact range; The power outage assessment equipment is the power equipment to be shut down for maintenance or the power equipment that has a power outage failure; The method for determining similar power distribution equipment of the power outage assessment device is as follows: Determine the basic similarity between the power outage assessment device and different power devices in the power grid diagram based on the device type of the power outage assessment device and the historical power transmission amount at different time periods on different dates, and use the basic similarity to screen suspected similar power devices; Determine the topological similarity between the power outage assessment device and the suspected similar power devices based on the downstream circuit topology of the power outage assessment device, and determine similar assessment devices among the suspected similar power devices using the topological similarity; Determine the similarity of the topological circuit structure of the power outage assessment device in different downstream circuit topologies with that of the similar assessment device through the historical power consumption data of the power equipment in different downstream circuit topologies and different power users of the power outage assessment device; The device similarity of different similar evaluation devices is determined based on the topological circuit structure similarity, topological similarity and basic similarity between different downstream circuit topologies and the similar evaluation devices, and the device similarity is used to determine the similar distribution equipment of the power outage evaluation device.

2. The power outage impact range assessment method based on the power grid diagram according to claim 1, characterized in that: The method for determining the impact range of the initial power outage is: A downstream circuit topology of the power outage assessment device is determined according to the position of the power outage assessment device in the power grid map, and the impact range of the initial power outage is determined using connected power users of the downstream circuit topology.

3. The power outage impact range assessment method based on power grid diagram according to claim 1, characterized in that: The historical operation data includes the historical power transmission amount of the power outage assessment device at different time periods on different dates.

4. The method for evaluating the impact range of power outage based on power grid diagram according to claim 1, characterized in that: The accuracy of determining the impact of the initial power outage is abnormal, including: Determine the historical power consumption of different power users at different time periods on different dates based on the historical power consumption data of power users within the scope of the initial power outage, and determine the transmission power deviation at different time periods on different dates in combination with the historical transmission power of the power outage assessment device at different time periods on different dates; Determine the comprehensive deviation amount of different dates by using the transmission power deviation amount of different time periods, and determine the deviation date by using the comprehensive deviation amount; The recognition accuracy of the initial power outage impact range is determined based on the number of deviation dates and the comprehensive deviation amounts of different deviation dates, and whether there is an abnormality in the recognition accuracy of the initial power outage impact range is determined based on a preset accuracy threshold.

5. The method for evaluating the impact range of power outage based on power grid diagram according to claim 1, characterized in that: Determining similar power distribution equipment to the power outage assessment equipment by using the equipment similarity specifically includes: Similar evaluation equipment that meets the equipment similarity requirements is regarded as similar power distribution equipment.

6. The method for evaluating the impact range of power outage based on power grid diagram according to claim 1, characterized in that: The method for determining the suspected problem circuit topology is: Determine the power consumption of the power users of the downstream circuit topology on different dates based on the historical power consumption data of the power users of the downstream circuit topology, and determine the deviation amount on different dates in combination with the historical power transmission amount of the downstream circuit topology on different dates; The power deviation date is determined by the deviation amount of different dates, and the number of the power deviation date is used to determine the suspected problem circuit topology.

7. The method for evaluating the impact range of power outage based on power grid diagram according to claim 6, characterized in that: Determining the suspected problematic circuit topology by using the number of power deviation dates specifically includes: The downstream circuit topology whose number of power deviation dates does not meet the requirement is regarded as a suspected problematic circuit topology.

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