Method and device for determining low-voltage power supply reliability

Abstract

The invention provides a low-voltage power supply reliability determination method and device, and belongs to the field of power grids. The method comprises the following steps: acquiring a power failure event of each low-voltage user in a preset time period in a preset monitoring area; classifying the power failure events of each low-voltage user in a preset time period in the preset monitoring area to obtain a classification result; determining the low-voltage power supply reliability of the preset monitoring area in the preset time period according to the classification result and the power failure event of each low-voltage user in the preset time period in the preset monitoring area; wherein the low-voltage power supply reliability comprises average power failure time, average power supply reliability, average power failure frequency and average short-time power failure frequency. Whether low-voltage power supply is reliable or not can be determined in time, corresponding measures can be taken according to the result, the low-voltage power supply reliability is further improved, and power utilization of low-voltage users is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of power grid technology, and in particular to a method and device for determining low-voltage power supply reliability. Background Art

[0002] With the continuous development of economy and improvement of living standards, the power load is increasing rapidly, and the requirements of low-voltage users for power supply reliability are getting higher and higher. Power supply reliability is one of the most important indicators reflecting the power supply capacity and quality of the power system.

[0003] At present, the methods for determining power supply reliability are all to calculate and count the power supply reliability of medium voltage and above power grids. There is a lack of methods to determine the power supply reliability of low voltage users, resulting in the inability to timely determine whether the low voltage power supply is reliable, and the inability to timely perceive whether low voltage users have power outages, causing inconvenience to low voltage users in electricity use. Summary of the invention

[0004] The embodiments of the present invention provide a method and device for determining the reliability of low-voltage power supply, which can determine the power supply reliability of low-voltage users and can timely determine whether the low-voltage power supply is reliable.

[0005] In a first aspect, an embodiment of the present invention provides a method for determining low-voltage power supply reliability, comprising:

[0006] Obtain power outage events of each low-voltage user in a preset monitoring area within a preset time period;

[0007] Classify the power outage events of each low-voltage user in the preset monitoring area within the preset time period to obtain the classification results;

[0008] Determine the low-voltage power supply reliability of the preset monitoring area within the preset time period according to the classification results and the power outage events of each low-voltage user in the preset monitoring area within the preset time period;

[0009] Among them, low-voltage power supply reliability includes average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency.

[0010] In a possible implementation, the power outage events of each low-voltage user in a preset monitoring area within a preset time period are classified to obtain a classification result, including:

[0011] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, a power outage event whose duration is less than or equal to the preset time is determined as a short power outage, and a power outage event whose duration is greater than the preset time is determined as a continuous power outage;

[0012] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of a preset number of low-voltage users on adjacent floors at the same time, it is determined to be a floor group power outage;

[0013] Based on the power outage events of various low-voltage users in the preset monitoring area within the preset time period, the power outage events that comply with the pre-arranged power outage plan are determined as power restriction power outages.

[0014] In a possible implementation, determining the low-voltage power supply reliability of a preset monitoring area within a preset time period according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within a preset time period includes:

[0015] Get the preset power outage types that are not included in the statistics;

[0016] Based on the power outage types not included in the statistics, the classification results and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, the low-voltage power supply reliability of the preset monitoring area within the preset time period is determined.

[0017] In a possible implementation, the calculation formula for the average power outage time S of a preset monitoring area within a preset time period is:

[0018]

[0019] Among them, T i1 N is the power outage duration corresponding to the i1th power outage in the preset monitoring area within the preset time period; i1 is the number of low-voltage users with power outages corresponding to the i1th power outage in the preset monitoring area within the preset time period; N is the total number of low-voltage users in the preset monitoring area; I1 is the total number of power outages in the preset monitoring area within the preset time period; D indicates whether the power outages of the floor group are included in the statistics. If the power outages of the floor group are not included in the statistics, D = 1; if the power outages of the floor group are included in the statistics, D = 0; T i2 N is the power outage duration corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; i2 is the number of low-voltage users with power outages corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; I2 is the number of floor group power outages in the preset monitoring area within the preset time period; B indicates whether power outages are included in the statistics, if not, B=1, if included, B=0; T i3 N is the power outage duration corresponding to the i3th power outage in the preset monitoring area within the preset time period; i3is the number of low-voltage users with power outages corresponding to the i3th power outage in the preset monitoring area within the preset time period; I3 is the number of power outages in the preset monitoring area within the preset time period; C indicates whether short-term power outages are included in the statistics. If short-term power outages are not included in the statistics, C=1; if short-term power outages are included in the statistics, C=0; T i4 N is the power outage duration corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; i4 is the number of low-voltage users with power outages corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; I4 is the number of short-term power outages in the preset monitoring area within the preset time period.

[0020] In a possible implementation, the calculation formula for the average power supply reliability rate S of the preset monitoring area within the preset time period is:

[0021]

[0022] Wherein, T is the duration of the preset time period.

[0023] In a possible implementation, the calculation formula for the average power outage frequency F of a preset monitoring area within a preset time period is:

[0024] In a possible implementation, the calculation formula of the average short-term power outage frequency MA in the preset monitoring area within the preset time period is:

[0025] In a possible implementation, classifying the power outage events of each low-voltage user in a preset monitoring area within a preset time period to obtain a classification result further includes:

[0026] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the first preset number on non-adjacent floors in the same unit at the same time, it is determined that the entire unit has a power outage; after it is determined that the entire unit has a power outage, if other buildings in the same substation also have a power outage of the entire unit, it is determined to be a substation power outage, otherwise, it is determined to be a low-voltage line power outage;

[0027] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the second preset number in different units in the same building at the same time, it is determined that the entire building is out of power; after it is determined that the entire building is out of power, if other buildings in the same substation area also have power outages, it is determined to be a substation area power outage, otherwise, it is determined to be a low-voltage line power outage;

[0028] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are greater than or equal to the third preset number of low-voltage users in different buildings in the same community and power outages occur simultaneously, it is determined whether the low-voltage users in the community who experience power outages simultaneously are low-voltage users in the same substation. If so, it is determined to be a substation power outage; if not, it is determined to be a community power outage or a simultaneous power outage in multiple substations.

[0029] In a possible implementation, monitoring equipment is installed on the low-voltage user side of a preset monitoring area to monitor power outage events of the corresponding low-voltage users.

[0030] In a second aspect, an embodiment of the present invention provides a low-voltage power supply reliability determination device, comprising:

[0031] An acquisition module, used to acquire power outage events of each low-voltage user in a preset monitoring area within a preset time period;

[0032] A classification module is used to classify the power outage events of each low-voltage user in a preset monitoring area within a preset time period to obtain a classification result;

[0033] A power supply reliability determination module is used to determine the low-voltage power supply reliability of a preset monitoring area within a preset time period according to the classification results and the power outage events of each low-voltage user in the preset monitoring area within a preset time period;

[0034] Among them, low-voltage power supply reliability includes average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency.

[0035] The embodiment of the present invention provides a method and device for determining the reliability of low-voltage power supply, which obtains power outage events of each low-voltage user in a preset monitoring area within a preset time period; classifies the power outage events of each low-voltage user in the preset monitoring area within the preset time period to obtain a classification result; determines the low-voltage power supply reliability of the preset monitoring area within the preset time period according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, thereby determining the power supply reliability of the low-voltage users, specifically determining the average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency of the low-voltage users, and being able to timely determine whether the low-voltage power supply is reliable, and then taking corresponding measures based on the results to further improve the reliability of the low-voltage power supply and ensure the power supply to the low-voltage users. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a flow chart of a method for determining low-voltage power supply reliability provided by an embodiment of the present invention;

[0038] Figure 2 It is a structural schematic diagram of a low-voltage power supply reliability determination device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0041] Figure 1 The implementation flow chart of the method for determining the reliability of low-voltage power supply provided by the embodiment of the present invention, the execution subject of the method may be a terminal device, and the terminal device may be a terminal with a monitoring platform installed, for example, it may be a main station of a power grid, etc. The method for determining the reliability of low-voltage power supply is described in detail as follows:

[0042] Step 101, obtaining power outage events of each low-voltage user in a preset monitoring area within a preset time period.

[0043] Among them, the preset monitoring area can be determined according to actual needs, for example, it can be a certain community, a certain street, a certain substation, several communities or several substations, and so on.

[0044] The preset time period can also be determined according to actual needs, for example, it can be a month, a quarter, or a year, etc.

[0045] In some embodiments, monitoring equipment is installed on the low-voltage user side of the preset monitoring area to monitor power outage events corresponding to the low-voltage users.

[0046] Each low-voltage user is equipped with a monitoring device. This monitoring device is a small monitoring device, smaller than an electric energy meter, and is used to monitor power outages of the corresponding low-voltage user. The monitoring device can use wireless public network communication, for example, 5G signal communication, to send information to the main station when the power consumption status of the corresponding low-voltage user changes, which can ensure timeliness. And the monitoring device only monitors the power outage and restoration status of the user, which is small, low-cost and easy to install.

[0047] When a low-voltage user experiences a power outage, the monitoring device can detect the voltage loss and send the power outage information of the low-voltage user to the main station, which may include the area, house number, and power outage time of the low-voltage user. When the power supply is restored, the monitoring device sends the power supply restoration information to the main station, which may include the area, house number, and power restoration time of the low-voltage user.

[0048] Combined with the power outage and power restoration time of the low-voltage users, the duration of each power outage for the low-voltage user can be obtained. Based on the power outage and power restoration information of each low-voltage user in the preset monitoring area within the preset time period, the number of low-voltage users and the power outage duration corresponding to each power outage in the preset monitoring area can be determined, etc., so as to provide data support for the low-voltage power supply reliability.

[0049] The embodiment of the present application forms a separate monitoring platform through the monitoring equipment and the main station corresponding to each low-voltage user, and uses simple power outage and restoration signals or information to timely obtain the power outage and restoration status of each low-voltage user, providing a data basis for subsequent calculations.

[0050] Step 102, classifying the power outage events of each low-voltage user in a preset monitoring area within a preset time period to obtain a classification result.

[0051] This embodiment can determine the type of power outage events for each low-voltage user in a preset monitoring area within a preset time period. For example, it can be classified based on the scope of the power outage or the nature of the power outage to obtain the type corresponding to each power outage, that is, to obtain the classification result.

[0052] Step 103, determining the low-voltage power supply reliability of the preset monitoring area within the preset time period according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within the preset time period;

[0053] Among them, low-voltage power supply reliability includes average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency.

[0054] This embodiment takes into account the classification results, and may not include all types of power outage events in the statistics, so that the low-voltage power supply reliability corresponding to each power outage type desired by the customer can be obtained, and specifically, the average power outage time, average power supply reliability, average power outage frequency, and average short-term power outage frequency data in the preset monitoring area within the preset time period can be obtained. The real-time perception capability of the power outage and restoration status of low-voltage users can be greatly improved, and the power outage of a low-voltage user can be discovered at the first time and handled in a timely manner.

[0055] According to the method provided in the embodiment of the present application, after running for a period of time, the main causes of power outages for low-voltage users in each area can be obtained based on the power outage data corresponding to different power outage types, so that targeted optimization and improvement can be carried out.

[0056] The embodiment of the present application obtains power outage events of each low-voltage user in a preset monitoring area within a preset time period; classifies the power outage events of each low-voltage user in the preset monitoring area within the preset time period to obtain a classification result; determines the low-voltage power supply reliability of the preset monitoring area within the preset time period according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, thereby determining the power supply reliability of the low-voltage users, specifically, the average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency of the low-voltage users can be determined, and whether the low-voltage power supply is reliable can be determined in time, and then corresponding measures can be taken according to the results to further improve the low-voltage power supply reliability and ensure electricity use for low-voltage users.

[0057] In some embodiments, the above step 102 may include:

[0058] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, a power outage event whose duration is less than or equal to the preset time is determined as a short power outage, and a power outage event whose duration is greater than the preset time is determined as a continuous power outage;

[0059] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of a preset number of low-voltage users on adjacent floors at the same time, it is determined to be a floor group power outage;

[0060] Based on the power outage events of various low-voltage users in the preset monitoring area within the preset time period, the power outage events that comply with the pre-arranged power outage plan are determined as power restriction power outages.

[0061] In this embodiment, the duration of a power outage is divided into short power outage and continuous power outage based on the preset time. A power outage event whose duration is less than or equal to the preset time is called a short power outage, and a power outage event whose duration is greater than the preset time is called a continuous power outage. The preset time can be 3 minutes or other time, which can be determined according to actual needs.

[0062] The number within the preset range can be determined according to actual needs, for example, it can be in the range of 3-5. For example, if there are 3-5 low-voltage users on adjacent floors with power outages at the same time, it is considered a floor group power outage, and the power outage is mostly caused by the tripping of the circuit breaker. It can be used for irregular power consumption by users, resulting in the tripping of the floor group circuit breaker, causing power outages on adjacent floors, which belongs to the category of low voltage impact. Among them, the specific floor group affiliation can be determined according to the low-voltage topology of the area.

[0063] Each region may have a planned power outage, i.e., a pre-arranged power outage plan, considering the power supply situation. A power outage event that falls within the pre-arranged power outage plan is called a power outage. Power outages may sometimes be excluded from the statistical data of power supply reliability.

[0064] In some embodiments, the above step 103 may include:

[0065] Get the preset power outage types that are not included in the statistics;

[0066] Based on the power outage types not included in the statistics, the classification results and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, the low-voltage power supply reliability of the preset monitoring area within the preset time period is determined.

[0067] Based on the various power outage types determined in the above classification results, it is possible to pre-set which power outage types are not included in the statistical scope of power supply reliability. For example, the above-mentioned short-term power outages, power outages due to power restrictions and / or floor group power outages are not included in the statistics. Therefore, when subsequently calculating the low-voltage power supply reliability, the power outage events that are not included in the statistics can be eliminated to obtain a low-voltage power supply reliability that better meets customer needs.

[0068] In some embodiments, the calculation formula for the average power outage time S of the preset monitoring area within the preset time period is:

[0069]

[0070] Among them, T i1 N is the power outage duration corresponding to the i1th power outage in the preset monitoring area within the preset time period; i1 is the number of low-voltage users with power outages corresponding to the i1th power outage in the preset monitoring area within the preset time period; N is the total number of low-voltage users in the preset monitoring area; I1 is the total number of power outages in the preset monitoring area within the preset time period; D indicates whether the power outages of the floor group are included in the statistics. If the power outages of the floor group are not included in the statistics, D = 1; if the power outages of the floor group are included in the statistics, D = 0; T i2 N is the power outage duration corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; i2is the number of low-voltage users with power outages corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; I2 is the number of floor group power outages in the preset monitoring area within the preset time period; B indicates whether power outages are included in the statistics, if not, B=1, if included, B=0; T i3 N is the power outage duration corresponding to the i3th power outage in the preset monitoring area within the preset time period; i3 is the number of low-voltage users with power outages corresponding to the i3th power outage in the preset monitoring area within the preset time period; I3 is the number of power outages in the preset monitoring area within the preset time period; C indicates whether short-term power outages are included in the statistics. If short-term power outages are not included in the statistics, C=1; if short-term power outages are included in the statistics, C=0; T i4 N is the power outage duration corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; i4 is the number of low-voltage users with power outages corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; I4 is the number of short-term power outages in the preset monitoring area within the preset time period.

[0071] In some embodiments, the calculation formula of the average power supply reliability rate S of the preset monitoring area within the preset time period is:

[0072]

[0073] Wherein, T is the duration of the preset time period.

[0074] In some embodiments, the calculation formula for the average power outage frequency F of the preset monitoring area within the preset time period is:

[0075] In some embodiments, the calculation formula for the average short-term power outage frequency MA in the preset monitoring area within the preset time period is:

[0076] The average power outage time, average power supply reliability rate, and average power outage frequency calculated in the embodiment of the present application all take into account whether the floor group power outage, power outage with limited power, and short-term power outage are included in the statistics, which can be determined according to customer needs, so that the calculation results are more in line with customer usage needs. The average power outage time is the average number of power outage hours in a preset time period, and the unit can be h / household; the average power supply reliability rate can be the ratio of the total number of hours of effective power supply time for low-voltage users in a preset time period to the total number of hours in the preset time period, and the unit can be %; the average power outage frequency is the average number of power outages in a preset time period, and the unit can be times / household; the average short-term power outage frequency is the average number of short-term power outages in a preset time period, and the unit can be times / household.

[0077] In some embodiments, the above step 102 may further include:

[0078] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the first preset number on non-adjacent floors in the same unit at the same time, it is determined that the entire unit has a power outage; after it is determined that the entire unit has a power outage, if other buildings in the same substation also have a power outage of the entire unit, it is determined to be a substation power outage, otherwise, it is determined to be a low-voltage line power outage;

[0079] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the second preset number in different units in the same building at the same time, it is determined that the entire building is out of power; after it is determined that the entire building is out of power, if other buildings in the same substation area also have power outages, it is determined to be a substation area power outage, otherwise, it is determined to be a low-voltage line power outage;

[0080] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are greater than or equal to the third preset number of low-voltage users in different buildings in the same community and power outages occur simultaneously, it is determined whether the low-voltage users in the community who experience power outages simultaneously are low-voltage users in the same substation. If so, it is determined to be a substation power outage; if not, it is determined to be a community power outage or a simultaneous power outage in multiple substations.

[0081] The present application embodiment can classify the power outage event into the whole unit power outage, the whole building power outage, and further classify it into the power outage of the substation or the power outage of the low-voltage line. The power outage event can also be divided into a single substation power outage (substation power outage) or a simultaneous power outage of multiple substations (community power outage).

[0082] The first preset number, the second preset number and the third preset number can be the same or different, and can be set according to actual needs, and are not specifically limited here. For example, the first preset number, the second preset number and the third preset number can all be 3 or 5, and so on.

[0083] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0084] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0085] Figure 2 The following is a schematic diagram showing the structure of a low voltage power supply reliability determination device provided by an embodiment of the present invention. For ease of description, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:

[0086] like Figure 2 As shown, the low voltage power supply reliability determination device 20 includes: an acquisition module 21, a classification module 22 and a power supply reliability determination module 23.

[0087] An acquisition module 21 is used to acquire power outage events of each low-voltage user in a preset monitoring area within a preset time period;

[0088] A classification module 22, for classifying the power outage events of each low-voltage user in a preset monitoring area within a preset time period to obtain a classification result;

[0089] A power supply reliability determination module 23, for determining the low-voltage power supply reliability of a preset monitoring area within a preset time period according to the classification results and the power outage events of each low-voltage user in the preset monitoring area within a preset time period;

[0090] Among them, low-voltage power supply reliability includes average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency.

[0091] In a possible implementation, the classification module 22 is specifically used for:

[0092] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, a power outage event whose duration is less than or equal to the preset time is determined as a short power outage, and a power outage event whose duration is greater than the preset time is determined as a continuous power outage;

[0093] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of a preset number of low-voltage users on adjacent floors at the same time, it is determined to be a floor group power outage;

[0094] Based on the power outage events of various low-voltage users in the preset monitoring area within the preset time period, the power outage events that comply with the pre-arranged power outage plan are determined as power restriction power outages.

[0095] In a possible implementation, the power supply reliability determination module 23 is specifically used to:

[0096] Get the preset power outage types that are not included in the statistics;

[0097] Based on the power outage types not included in the statistics, the classification results and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, the low-voltage power supply reliability of the preset monitoring area within the preset time period is determined.

[0098] In a possible implementation, the calculation formula for the average power outage time S of a preset monitoring area within a preset time period is:

[0099]

[0100] Among them, T i1 N is the power outage duration corresponding to the i1th power outage in the preset monitoring area within the preset time period; i1 is the number of low-voltage users with power outages corresponding to the i1th power outage in the preset monitoring area within the preset time period; N is the total number of low-voltage users in the preset monitoring area; I1 is the total number of power outages in the preset monitoring area within the preset time period; D indicates whether the power outages of the floor group are included in the statistics. If the power outages of the floor group are not included in the statistics, d=1; if the power outages of the floor group are included in the statistics, D=0; T i2 N is the power outage duration corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; i2 is the number of low-voltage users with power outages corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; I2 is the number of floor group power outages in the preset monitoring area within the preset time period; B indicates whether power outages are included in the statistics, if not, B=1, if included, B=0; T i3 N is the power outage duration corresponding to the i3th power outage in the preset monitoring area within the preset time period; i3 is the number of low-voltage users with power outages corresponding to the i3th power outage in the preset monitoring area within the preset time period; I3 is the number of power outages in the preset monitoring area within the preset time period; C indicates whether short-term power outages are included in the statistics. If short-term power outages are not included in the statistics, C=1; if short-term power outages are included in the statistics, C=0; T i4 N is the power outage duration corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; i4 is the number of low-voltage users with power outages corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; I4 is the number of short-term power outages in the preset monitoring area within the preset time period.

[0101] In a possible implementation, the calculation formula for the average power supply reliability rate S of the preset monitoring area within the preset time period is:

[0102]

[0103] Wherein, T is the duration of the preset time period.

[0104] In a possible implementation, the calculation formula for the average power outage frequency F of a preset monitoring area within a preset time period is:

[0105] In a possible implementation, the calculation formula of the average short-term power outage frequency MA in the preset monitoring area within the preset time period is:

[0106] In a possible implementation, the classification module 22 may also be used to:

[0107] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the first preset number on non-adjacent floors in the same unit at the same time, it is determined that the entire unit has a power outage; after it is determined that the entire unit has a power outage, if other buildings in the same substation also have a power outage of the entire unit, it is determined to be a substation power outage, otherwise, it is determined to be a low-voltage line power outage;

[0108] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the second preset number in different units in the same building at the same time, it is determined that the entire building is out of power; after it is determined that the entire building is out of power, if other buildings in the same substation area also have power outages, it is determined to be a substation area power outage, otherwise, it is determined to be a low-voltage line power outage;

[0109] Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are greater than or equal to the third preset number of low-voltage users in different buildings in the same community and power outages occur simultaneously, it is determined whether the low-voltage users in the community who experience power outages simultaneously are low-voltage users in the same substation. If so, it is determined to be a substation power outage; if not, it is determined to be a community power outage or a simultaneous power outage in multiple substations.

[0110] In a possible implementation, monitoring equipment is installed on the low-voltage user side of a preset monitoring area to monitor power outage events of the corresponding low-voltage users.

[0111] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0112] Those of ordinary skill in the art will appreciate that the templates, units, and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0113] If the module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the steps of the above-mentioned low-voltage power supply reliability determination method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium.

[0114] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for determining low voltage power supply reliability, characterized in that: include: Obtain power outage events of each low-voltage user in a preset monitoring area within a preset time period; Classifying the power outage events of each low-voltage user in the preset monitoring area within a preset time period to obtain a classification result; Determine the low-voltage power supply reliability of the preset monitoring area within the preset time period according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within the preset time period; Among them, the low-voltage power supply reliability includes average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency.

2. The method for determining low voltage power supply reliability according to claim 1, characterized in that: The power outage events of each low-voltage user in the preset monitoring area within the preset time period are classified to obtain the classification result, including: Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, a power outage event whose duration is less than or equal to the preset time is determined as a short power outage, and a power outage event whose duration is greater than the preset time is determined as a continuous power outage; Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of a preset number of low-voltage users on adjacent floors at the same time, it is determined to be a floor group power outage; Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, the power outage events that comply with the pre-arranged power outage plan are determined as power-limiting power outages.

3. The method for determining low voltage power supply reliability according to claim 2, characterized in that: The determining, according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, the low-voltage power supply reliability of the preset monitoring area within the preset time period comprises: Get the preset power outage types that are not included in the statistics; Based on the power outage types not included in the statistics, the classification results and the power outage events of each low-voltage user in the preset monitoring area within the preset time period, the low-voltage power supply reliability of the preset monitoring area within the preset time period is determined.

4. The method for determining low voltage power supply reliability according to claim 3, characterized in that: The calculation formula for the average power outage time S of the preset monitoring area within the preset time period is: Among them, T i1 is the power outage duration corresponding to the i1th power outage in the preset monitoring area within the preset time period; N i1 is the number of low-voltage users with power outages corresponding to the i1th power outage in the preset monitoring area within the preset time period; N is the total number of low-voltage users in the preset monitoring area; I1 is the total number of power outages in the preset monitoring area within the preset time period; D indicates whether the power outages of floor groups are included in the statistics, if not, D=1, if the power outages of floor groups are included in the statistics, D=0; T i2 N is the power outage duration corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; i2 is the number of low-voltage users with power outages corresponding to the i2th floor group power outage in the preset monitoring area within the preset time period; I2 is the number of floor group power outages in the preset monitoring area within the preset time period; B indicates whether power outages are included in the statistics, if not, B=1, if included, B=0; T i3 The power outage duration corresponding to the i3th power outage in the preset monitoring area within the preset time period; N i3 is the number of low-voltage users with power outages corresponding to the i3th power outage in the preset monitoring area within the preset time period; I3 is the number of power outages in the preset monitoring area within the preset time period; C indicates whether short-term power outages are included in the statistics, if not, C=1, if included, C=0; T i4 is the power outage duration corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; N i4 is the number of low-voltage users experiencing power outages corresponding to the i4th short-term power outage in the preset monitoring area within the preset time period; I4 is the number of short-term power outages in the preset monitoring area within the preset time period.

5. The method for determining low voltage power supply reliability according to claim 4, characterized in that: The calculation formula of the average power supply reliability rate S of the preset monitoring area within the preset time period is: Wherein, T is the duration of the preset time period.

6. The method for determining low voltage power supply reliability according to claim 4, characterized in that: The calculation formula for the average power outage frequency F of the preset monitoring area within the preset time period is:

7. The method for determining low voltage power supply reliability according to claim 4, characterized in that: The calculation formula of the average short-term power outage frequency MA of the preset monitoring area within the preset time period is:

8. The method for determining low voltage power supply reliability according to claim 2, characterized in that: The classifying the power outage events of each low-voltage user in the preset monitoring area within the preset time period to obtain the classification result also includes: Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to the first preset number on non-adjacent floors in the same unit at the same time, it is determined that the entire unit has a power outage; after determining that the entire unit has a power outage, if other buildings in the same substation also have a power outage of the entire unit, it is determined to be a substation power outage, otherwise, it is determined to be a low-voltage line power outage; Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are power outage events of low-voltage users greater than or equal to a second preset number in different units in the same building at the same time, it is determined that the entire building is out of power; after it is determined that the entire building is out of power, if other buildings in the same substation area also have power outages, it is determined to be a substation area power outage, otherwise, it is determined to be a low-voltage line power outage; Based on the power outage events of each low-voltage user in the preset monitoring area within the preset time period, if there are greater than or equal to the third preset number of low-voltage users in different buildings in the same community and power outages occur simultaneously, it is determined whether the low-voltage users in the community who experience power outages simultaneously are low-voltage users in the same substation. If so, it is determined to be a substation power outage; if not, it is determined to be a community power outage or a simultaneous power outage in multiple substations.

9. The method for determining low voltage power supply reliability according to any one of claims 1 to 8, characterized in that: Monitoring equipment is installed on the low-voltage user side of the preset monitoring area to monitor power outage events of the corresponding low-voltage users.

10. A low voltage power supply reliability determination device, characterized in that: include: An acquisition module, used to acquire power outage events of each low-voltage user in a preset monitoring area within a preset time period; A classification module, used to classify the power outage events of each low-voltage user in the preset monitoring area within a preset time period to obtain a classification result; A power supply reliability determination module, used to determine the low-voltage power supply reliability of the preset monitoring area within the preset time period according to the classification result and the power outage events of each low-voltage user in the preset monitoring area within the preset time period; Among them, the low-voltage power supply reliability includes average power outage time, average power supply reliability rate, average power outage frequency and average short-term power outage frequency.

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