A low voltage severity assessment method and system

Abstract

This invention provides a method and system for assessing the severity of low voltage, relating to the field of low voltage data processing technology. The method includes the following steps: upon receiving a user's daily assessment instruction, obtaining the user's daily electricity usage duration and lowest voltage; determining whether the lowest voltage falls within a first low voltage threshold range; if the lowest voltage falls within the first low voltage threshold range, determining the user's daily low voltage coefficient using electricity usage duration, lowest voltage, duration weight, and voltage weight; if the lowest voltage does not fall within the first low voltage threshold range, the user's daily low voltage coefficient is 0. By combining voltage values ​​and electricity usage duration and introducing weights to reflect their different degrees of influence on the severity of low voltage, the actual impact of low voltage is reflected, improving the accuracy of reflecting the severity of low voltage.

Description

Technical Field

[0001] This invention relates to the field of low voltage data processing technology, and specifically to a method and system for assessing the severity of low voltage. Background Technology

[0002] Traditional technologies typically assess the severity of low voltage using a single indicator, such as judging a fault solely based on whether the voltage value is below a threshold or considering only the duration of low voltage. This lack of comprehensive consideration of both factors leads to several drawbacks: First, the assessment dimension is singular, failing to accurately reflect the actual impact of low voltage. Focusing only on voltage value or duration while ignoring the interrelationship between the two can result in misjudgments of severity. Second, the lack of a hierarchical statistical mechanism makes it difficult to achieve comprehensive assessments from individual to regional levels, hindering regional fault location and optimization decisions by power departments. Third, it cannot support long-term trend analysis (such as weekly, monthly, or yearly periods), making it difficult to identify potential problems in power grid operation. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for assessing the severity of low voltage, and the technical problem to be solved is how to improve the accuracy of reflecting the severity of low voltage.

[0004] This invention is achieved through the following technical solution:

[0005] The first aspect provides a method for assessing the severity of low voltage, including the following steps:

[0006] Upon receiving a user's daily assessment instruction, obtain the user's daily electricity usage duration and lowest voltage.

[0007] Determine whether the aforementioned minimum voltage falls within the first low voltage threshold range;

[0008] If the aforementioned minimum voltage falls within the first low voltage threshold range, the user's daily low voltage coefficient is determined by the electricity usage duration, minimum voltage, duration weight, and voltage weight.

[0009] If the aforementioned minimum voltage is not within the first low voltage threshold range, then the user's daily low voltage coefficient is 0.

[0010] When the minimum voltage falls within the first low-voltage threshold range, the user's daily low-voltage coefficient is determined comprehensively by considering electricity usage duration, minimum voltage, duration weight, and voltage weight. This approach goes beyond a single indicator, combining voltage value and electricity usage duration with weights to reflect their varying degrees of impact on low-voltage severity, thus reflecting the actual impact of low voltage and improving the accuracy of low-voltage severity assessment. With the individual user's daily low-voltage coefficient, data can be further aggregated and analyzed to achieve comprehensive assessment from individual to regional levels, constructing a hierarchical statistical mechanism. Simultaneously, daily user data can be organized and analyzed over long periods such as weeks, months, and years, supporting long-term trend analysis and identifying potential problems in power grid operation. Therefore, this technical solution improves the accuracy of the user's daily low-voltage coefficient assessment, providing data support for regional and long-term assessments, and contributing to an overall improvement in the accuracy of low-voltage severity assessment.

[0011] Furthermore, upon receiving a daily assessment instruction for a distribution area, the daily low voltage coefficient and total number of users for each user in that distribution area are obtained.

[0012] The daily low voltage coefficient of the transformer area is determined by summing the daily low voltage coefficients of each user in the above-mentioned transformer area and the total number of users.

[0013] When a daily assessment instruction for a transformer substation is received, a quantitative assessment of the low voltage status of a specific substation on a specified date is performed. The resulting daily low voltage coefficient can be used to assess the overall low voltage status of the substation on that day, which helps power management departments to promptly identify and resolve low voltage issues and ensure normal power supply for users.

[0014] Furthermore, upon receiving a daily assessment instruction for a region, the voltage curves for each user in that region for that day are obtained to determine whether a user is a low-voltage user. The steps include:

[0015] Determine whether the duration of the voltage curve in the second low voltage threshold range is greater than a preset duration;

[0016] If the duration of the aforementioned minimum voltage being within the second low voltage threshold range is equal to or greater than the preset duration, then the user is a low voltage user; otherwise, the user is a normal user.

[0017] The steps to determine the daily low voltage coefficient for the above-mentioned area include:

[0018] Obtain the daily low voltage coefficient for each low voltage user in the above-mentioned area and the total number of users in the area;

[0019] The daily low voltage coefficient of a region is determined by summing the daily low voltage coefficients of all low voltage users in the region and the total number of users in the region.

[0020] First, low-voltage users are identified. Then, the daily low-voltage coefficient for each low-voltage user is calculated, along with the total number of users including both low-voltage and normal users. Factors such as the percentage of time the voltage is below the specified threshold and the degree of voltage deviation from the normal range are comprehensively considered to assess the overall low-voltage situation in the area on that day. The assessment results are then fed back to the power management department to provide data support for subsequent power facility planning, upgrades, and operation and maintenance decisions.

[0021] Furthermore, upon receiving a regional periodic assessment instruction, the system obtains the daily low-voltage coefficient of each low-voltage user in the region within the period, the total number of users in the region, and the number of days in the period.

[0022] The regional periodic low voltage coefficient is determined by summing the daily low voltage coefficients of all low voltage users in the region within the aforementioned period, the total number of users in the region, and the number of days in the period.

[0023] Upon receiving a regional periodic assessment instruction, a comprehensive assessment of the low voltage situation in a specific region within a specified period (e.g., one week, one month, one year) is performed. For each user within the region identified as having low voltage within the period, their daily low voltage coefficient is collected for each day of the period. The daily low voltage coefficients for each low-voltage user within the period are summed to obtain the sum of the daily low voltage coefficients for all low-voltage users in the region during the period. This sum, combined with the total number of users in the region within the period and the number of days in the period, yields the regional periodic low voltage coefficient. The overall low voltage situation in the region during the period is then assessed using the regional periodic low voltage coefficient.

[0024] Furthermore, the user's daily low voltage coefficient is determined using the following formula:

[0025] ,

[0026] in, Indicates the first The daily low voltage coefficient for each user; This indicates the user's electricity usage duration for the day; This represents the upper limit of the first low voltage threshold range; This represents the lower limit of the first low voltage threshold range; This indicates the user's lowest voltage for the day; Indicates duration weight; This indicates voltage weighting.

[0027] Furthermore, the ratio of the aforementioned duration weight to the voltage weight is 1:2.

[0028] This index comprehensively measures the severity of low voltage for a user on a given day; the higher the coefficient, the more severe the low voltage problem. The ratio of duration weight to voltage weight is 1:2, which allows for setting the duration weight... =0.33, voltage weight =0.67, when assessing a user's daily low voltage coefficient, the impact of voltage deviation is twice that of the cumulative duration of low voltage. The daily low voltage coefficient can be used to assess the power quality of each user. For users with higher coefficients, personalized power usage suggestions or electrical equipment inspections can be provided. Statistical analysis of the daily low voltage coefficients of a large number of users can also reveal the distribution of low voltage problems within a region, providing a basis for the planning and upgrading of regional power facilities. When a user's daily low voltage coefficient rises abnormally, it may indicate a fault in the power line or a problem with the electrical equipment, allowing for timely dispatch of personnel for investigation and repair.

[0029] The second aspect provides a low voltage severity assessment system, which uses any of the above-described low voltage severity assessment methods;

[0030] The evaluation system includes:

[0031] The data acquisition device is used to obtain the user's daily electricity consumption duration and minimum voltage when a user's daily assessment instruction is received.

[0032] The processing device, which is connected to the acquisition device, is used to perform the following operations:

[0033] Determine whether the aforementioned minimum voltage falls within the first low voltage threshold range;

[0034] If the aforementioned minimum voltage falls within the first low voltage threshold range, the user's daily low voltage coefficient is determined by the electricity usage duration, minimum voltage, duration weight, and voltage weight.

[0035] If the aforementioned minimum voltage is not within the first low voltage threshold range, then the user's daily low voltage coefficient is 0.

[0036] Furthermore, when the aforementioned data acquisition equipment receives a daily assessment instruction for a distribution area, it obtains the daily low voltage coefficient and the total number of users for each user in that distribution area.

[0037] The processing equipment determines the daily low voltage coefficient of the transformer area by summing the daily low voltage coefficients of each user in the transformer area and the total number of users.

[0038] Furthermore, when the aforementioned data acquisition device receives a daily assessment instruction for the region, it acquires the voltage curves of each user in the region for that day.

[0039] The above-mentioned processing equipment performs the following steps:

[0040] To determine if a user is a low-voltage user, the steps include:

[0041] Determine whether the duration of the voltage curve in the second low voltage threshold range is greater than a preset duration;

[0042] If the duration of the aforementioned minimum voltage being within the second low voltage threshold range is equal to or greater than the preset duration, then the user is a low voltage user; otherwise, the user is a normal user.

[0043] The steps to determine the daily low voltage coefficient for the above-mentioned area include:

[0044] The above-mentioned data acquisition equipment is used to obtain the daily low voltage coefficient of each low voltage user in the above-mentioned area and the total number of users in the area.

[0045] The daily low voltage coefficient of a region is determined by summing the daily low voltage coefficients of all low voltage users in the region and the total number of users in the region.

[0046] Furthermore, when the aforementioned data acquisition device receives a regional periodic assessment instruction, it acquires the daily low voltage coefficient of each low voltage user in the region, the total number of users in the region, and the number of days in the period.

[0047] The regional periodic low voltage coefficient is determined by summing the daily low voltage coefficients of all low voltage users in the region within the aforementioned period, the total number of users in the region, and the number of days in the period.

[0048] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0049] When the minimum voltage falls within the first low-voltage threshold range, the user's daily low-voltage coefficient is determined comprehensively by considering electricity usage duration, minimum voltage, duration weight, and voltage weight. This approach goes beyond a single indicator, combining voltage value and electricity usage duration with weights to reflect their varying degrees of impact on low-voltage severity, thus reflecting the actual impact of low voltage and improving the accuracy of low-voltage severity assessment. With the individual user's daily low-voltage coefficient, data can be further aggregated and analyzed to achieve comprehensive assessment from individual to regional levels, constructing a hierarchical statistical mechanism. Simultaneously, daily user data can be organized and analyzed over long periods such as weeks, months, and years, supporting long-term trend analysis and identifying potential problems in power grid operation. Therefore, this technical solution improves the accuracy of the user's daily low-voltage coefficient assessment, providing data support for regional and long-term assessments, and contributing to an overall improvement in the accuracy of low-voltage severity assessment. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0051] Figure 1 A flowchart for calculating the daily low voltage coefficient for users at the user level. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0053] Current technology classifies voltage drops below 120V as a fault, but it fails to quantify the severity of different voltage ranges or consider the duration of the fault. Furthermore, traditional methods lack a hierarchical assessment system, making it difficult to extend from individual users to different levels such as distribution areas, villages, towns, and counties, thus failing to provide comprehensive data analysis support for power grid management. To address these issues, the following example is provided.

[0054] First embodiment:

[0055] Combination Figure 1 A method for assessing the severity of low voltage includes the following steps:

[0056] Upon receiving a user's daily assessment instruction, obtain the user's daily electricity usage duration and lowest voltage.

[0057] Determine whether the aforementioned minimum voltage falls within the first low voltage threshold range;

[0058] If the aforementioned minimum voltage falls within the first low voltage threshold range, the user's daily low voltage coefficient is determined by the electricity usage duration, minimum voltage, duration weight, and voltage weight. The user's daily low voltage coefficient ranges from 0 to 100, with a higher value indicating a more severe low voltage condition.

[0059] If the aforementioned minimum voltage is not within the first low voltage threshold range, then the user's daily low voltage coefficient is 0.

[0060] When the minimum voltage falls within the first low voltage threshold range, the user's daily low voltage coefficient is determined comprehensively by considering electricity usage duration, minimum voltage, duration weight, and voltage weight. This approach goes beyond a single indicator, combining voltage value and electricity usage duration with weights to reflect their varying degrees of influence on the severity of low voltage. This reflects the actual impact of low voltage and improves the accuracy of its severity assessment. For example, even if two users have the same minimum voltage, a user with a longer electricity usage duration may have a higher low voltage coefficient according to the calculation method of this invention, better reflecting the severity of the low voltage impact on that user.

[0061] With the daily low-voltage coefficient for individual users, data from those users can be further aggregated and analyzed to achieve comprehensive assessment from individual to regional levels, constructing a hierarchical statistical mechanism. Simultaneously, daily user data can be organized and analyzed over longer periods such as weeks, months, and years, supporting long-term trend analysis and identifying potential problems in power grid operation. Therefore, this technical solution improves the accuracy of daily low-voltage coefficient assessment, providing data support for regional and long-term assessments, and contributing to an overall improvement in the accuracy of low-voltage severity assessment.

[0062] In a specific implementation, the user's daily low voltage coefficient is determined using the following formula:

[0063] ,

[0064] in, Indicates the first The daily low voltage coefficient for each user; This indicates the user's electricity usage duration for the day; This represents the upper limit of the first low voltage threshold range; This represents the lower limit of the first low voltage threshold range; This indicates the user's lowest voltage for the day; Indicates duration weight; This represents the voltage weight; the ratio of the duration weight to the voltage weight is 1:2, where... =0.33, =0.67.

[0065] This index comprehensively measures the severity of low voltage for a user on a given day; the higher the coefficient, the more severe the low voltage problem. The ratio of duration weighting to voltage weighting is 1:2, meaning that the impact of voltage deviation is twice that of cumulative low voltage duration when assessing a user's daily low voltage coefficient. The daily low voltage coefficient can be used to evaluate the power quality of each user. For users with high coefficients, personalized power usage suggestions or electrical equipment inspections can be provided. Statistical analysis of daily low voltage coefficients from a large number of users can also reveal the distribution of low voltage problems within a region, providing a basis for the planning and upgrading of regional power facilities. An abnormally high daily low voltage coefficient may indicate a fault in the power line or a problem with the electrical equipment, allowing for timely inspection and repair.

[0066] In one possible usage scenario, a first low voltage threshold range is preset to be [120, 185]V. According to this invention, if a user's lowest voltage is less than 120V or greater than 185V, then the user's daily low voltage coefficient is... =0, where, if the minimum voltage is greater than 185V, low voltage conditions are temporarily disregarded; if the user's minimum voltage is equal to or greater than 120V and less than or equal to 185V, then the coefficient calculation process begins. Monitoring shows that the user's electricity usage on a certain day was 24 hours, and the minimum voltage that day was 150V. It can be determined that the minimum voltage is greater than 120V and less than 185V, therefore the user enters the coefficient calculation process. The calculation formula is: This means that the user's daily low voltage coefficient is 69.

[0067] Second embodiment:

[0068] Based on the first embodiment, when a daily assessment instruction for a distribution area is received, the daily low voltage coefficient and the total number of users for each user in that distribution area are obtained.

[0069] The daily low voltage coefficient of the transformer area is determined by summing the daily low voltage coefficients of each user in the above-mentioned transformer area and the total number of users. The formula is as follows: . This indicates the daily low voltage coefficient for the transformer substation. This indicates the total number of users within the designated area.

[0070] When a daily assessment instruction for a transformer substation is received, a quantitative assessment of the low voltage status of a specific substation on a specified date is performed. The resulting daily low voltage coefficient can be used to assess the overall low voltage status of the substation on that day, which helps power management departments to promptly identify and resolve low voltage issues and ensure normal power supply for users.

[0071] Third embodiment:

[0072] Based on the first embodiment, upon receiving a daily regional assessment instruction, the voltage curves for each user in that region (e.g., village, town, county) are obtained for that day. The voltage curves are presented in a time series format, recording the voltage value at each time point (e.g., every minute, every 5 minutes). The steps to determine whether a user is a low-voltage user include:

[0073] Determine whether the duration of the voltage curve in the second low voltage threshold range is greater than a preset duration;

[0074] If the duration of the aforementioned minimum voltage being within the second low voltage threshold range is equal to or greater than the preset duration, then the user is a low voltage user; otherwise, the user is a normal user.

[0075] The steps to determine the daily low voltage coefficient for the above-mentioned area include:

[0076] Obtain the daily low voltage coefficient for each low voltage user in the above-mentioned area and the total number of users in the area;

[0077] The daily low voltage coefficient of the region is determined by summing the daily low voltage coefficients of all low voltage users in the aforementioned region and the total number of users in the region. The formula is as follows: ,in, Indicates the regional daily low voltage coefficient; This indicates the total number of low-voltage users within the area; This indicates the total number of users in the area, including low-voltage users and normal users.

[0078] Establish a multi-level assessment system, from individual users to distribution areas, villages, towns, and counties, to provide refined data support for power grid management. First, identify low-voltage users. Then, aggregate the daily low-voltage coefficient for each low-voltage user and the total number of users including both low-voltage and normal users. Consider factors such as the percentage of time the voltage is below the specified threshold and the degree of voltage deviation from the normal range to assess the overall low-voltage situation in the area on that day. Feedback the assessment results to the power management department to provide data support for subsequent power facility planning, upgrades, and operation and maintenance decisions. For example, in areas with severe low voltage, it may be necessary to increase transformer capacity, optimize the power grid structure, or adjust power supply lines.

[0079] One possible usage scenario is that the preset second low voltage threshold range is [132, 198]V, and the preset duration is 1 hour. When the voltage value of a user is monitored to be between [132, 198]V and the duration is more than 1 hour, the user is determined to be a low voltage user.

[0080] Fourth embodiment:

[0081] Based on the first embodiment, when a regional periodic assessment instruction is received, the daily low voltage coefficient of each low voltage user in the region, the total number of users in the region, and the number of days in the period are obtained.

[0082] The regional periodic low voltage coefficient is determined by summing the daily low voltage coefficients of all low-voltage users in the region within the aforementioned period, the total number of users in the region, and the number of days in the period. The formula is as follows: ,in, Indicates the regional periodic low voltage coefficient; Indicates the period number The timing is right, and the daily low voltage coefficient for users in the region is favorable. Indicates the number of days in a cycle.

[0083] Upon receiving a regional periodic assessment instruction, a comprehensive assessment of the low voltage situation in a specific region within a specified period (e.g., one week, one month, one year) is performed. For each user within the region identified as having low voltage within the period, their daily low voltage coefficient is collected for each day of the period. The daily low voltage coefficients for each low-voltage user within the period are summed to obtain the sum of the daily low voltage coefficients for all low-voltage users in the region during the period. This sum, combined with the total number of users in the region within the period and the number of days in the period, yields the regional periodic low voltage coefficient. The overall low voltage situation in the region during the period is then assessed using the regional periodic low voltage coefficient.

[0084] Fifth embodiment:

[0085] A low voltage severity assessment system, wherein the assessment system uses any of the above-described low voltage severity assessment methods;

[0086] The evaluation system includes:

[0087] The data acquisition device is used to obtain the user's daily electricity consumption duration and minimum voltage when a user's daily assessment instruction is received.

[0088] The processing device, which is connected to the acquisition device, is used to perform the following operations:

[0089] Determine whether the aforementioned minimum voltage falls within the first low voltage threshold range;

[0090] If the aforementioned minimum voltage falls within the first low voltage threshold range, the user's daily low voltage coefficient is determined by the electricity usage duration, minimum voltage, duration weight, and voltage weight.

[0091] If the aforementioned minimum voltage is not within the first low voltage threshold range, then the user's daily low voltage coefficient is 0.

[0092] Sixth embodiment:

[0093] Based on the fifth embodiment, when the above-mentioned data acquisition device receives the daily assessment instruction for the distribution area, it obtains the daily low voltage coefficient and the total number of users for each user in the distribution area.

[0094] The processing equipment determines the daily low voltage coefficient of the transformer area by summing the daily low voltage coefficients of each user in the transformer area and the total number of users.

[0095] Seventh embodiment:

[0096] Based on the fifth embodiment, when the above-mentioned data acquisition device receives a regional daily assessment instruction, it acquires the voltage curve of each user in the region for that day.

[0097] The above-mentioned processing equipment performs the following steps:

[0098] To determine if a user is a low-voltage user, the steps include:

[0099] Determine whether the duration of the voltage curve in the second low voltage threshold range is greater than a preset duration;

[0100] If the duration of the aforementioned minimum voltage being within the second low voltage threshold range is equal to or greater than the preset duration, then the user is a low voltage user; otherwise, the user is a normal user.

[0101] The steps to determine the daily low voltage coefficient for the above-mentioned area include:

[0102] The above-mentioned data acquisition equipment is used to obtain the daily low voltage coefficient of each low voltage user in the above-mentioned area and the total number of users in the area.

[0103] The daily low voltage coefficient of a region is determined by summing the daily low voltage coefficients of all low voltage users in the region and the total number of users in the region.

[0104] Eighth embodiment:

[0105] Based on the fifth embodiment, when the above-mentioned data acquisition device receives the regional periodic assessment instruction, it acquires the daily low voltage coefficient of each low voltage user in the region, the total number of users in the region, and the number of days in the period.

[0106] The regional periodic low voltage coefficient is determined by summing the daily low voltage coefficients of all low voltage users in the region within the aforementioned period, the total number of users in the region, and the number of days in the period.

[0107] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for assessing the severity of low voltage, characterized in that, Includes the following steps: Upon receiving a user's daily assessment instruction, obtain the user's daily electricity usage duration and lowest voltage. Determine whether the minimum voltage is within the first low voltage threshold range; If the lowest voltage is within the first low voltage threshold range, the user's daily low voltage coefficient is determined by the electricity usage duration, the lowest voltage, the duration weight, and the voltage weight; if the lowest voltage is not within the first low voltage threshold range, the user's daily low voltage coefficient is 0. The user's daily low voltage coefficient is determined using the following formula: ， in, Indicates the first The daily low voltage coefficient for each user; This indicates the user's electricity usage duration for the day; This represents the upper limit of the first low voltage threshold range; This represents the lower limit of the first low voltage threshold range; This indicates the user's lowest voltage for the day; Indicates duration weight; This indicates voltage weighting.

2. The method for assessing the severity of low voltage according to claim 1, characterized in that, Upon receiving a daily assessment instruction for a transformer substation, obtain the daily low voltage coefficient and total number of users for each user in that substation substation. The daily low voltage coefficient of the transformer area is determined by summing the daily low voltage coefficients of each user in the transformer area and the total number of users.

3. The method for assessing the severity of low voltage according to claim 2, characterized in that, Upon receiving a daily assessment instruction for a region, the system acquires the voltage curves for each user in that region for that day to determine whether a user is a low-voltage user. The steps include: Determine whether the duration of the voltage curve in the second low voltage threshold range is greater than a preset duration; If the duration of the lowest voltage being within the second low voltage threshold range is equal to or greater than a preset duration, then the user is a low voltage user; otherwise, the user is a normal user. The steps for determining the daily low voltage coefficient of the region include: Obtain the daily low voltage coefficient of each low voltage user in the region and the total number of users in the region; The daily low voltage coefficient of the region is determined by summing the daily low voltage coefficients of each low voltage user in the region and the total number of users in the region.

4. The method for assessing the severity of low voltage according to claim 3, characterized in that, Upon receiving a regional periodic assessment instruction, obtain the daily low voltage coefficient of each low voltage user in the region within the period, the total number of users in the region, and the number of days in the period. The regional periodic low voltage coefficient is determined by summing the daily low voltage coefficients of all low voltage users in the region within the period, the total number of users in the region, and the number of days in the period.

5. The method for assessing the severity of low voltage according to claim 1, characterized in that, The ratio of the duration weight to the voltage weight is 1:

2.

6. A low voltage severity assessment system, characterized in that, The assessment system uses the low voltage severity assessment method as described in any one of claims 1 to 5; The evaluation system includes: The data acquisition device is used to obtain the user's daily electricity consumption duration and minimum voltage when it receives a user's daily assessment instruction. The processing device, connected to the acquisition device, is used to perform the following operations: Determine whether the minimum voltage is within the first low voltage threshold range; If the minimum voltage is within the first low voltage threshold range, the user's daily low voltage coefficient is determined by the electricity usage duration, minimum voltage, duration weight, and voltage weight. If the lowest voltage is not within the first low voltage threshold range, the user's daily low voltage coefficient is 0.

7. The low voltage severity assessment system according to claim 6, characterized in that, When the data acquisition device receives a daily assessment instruction for a distribution area, it obtains the daily low voltage coefficient and the total number of users for each user in that distribution area. The processing equipment determines the daily low voltage coefficient of the transformer area by summing the daily low voltage coefficients of each user in the transformer area and the total number of users.

8. The low voltage severity assessment system according to claim 6, characterized in that, When the data acquisition device receives a daily assessment instruction for the region, it acquires the voltage curves of each user in the region for that day. The processing device performs the following steps: To determine if a user is a low-voltage user, the steps include: Determine whether the duration of the voltage curve in the second low voltage threshold range is greater than a preset duration; If the duration of the lowest voltage being within the second low voltage threshold range is equal to or greater than a preset duration, then the user is a low voltage user; otherwise, the user is a normal user. The steps for determining the daily low voltage coefficient of the region include: The acquisition device obtains the daily low voltage coefficient of each low voltage user in the area and the total number of users in the area. The daily low voltage coefficient of the region is determined by summing the daily low voltage coefficients of each low voltage user in the region and the total number of users in the region.

9. The low voltage severity assessment system according to claim 8, characterized in that, When the data acquisition device receives a regional periodic assessment instruction, it obtains the daily low voltage coefficient of each low voltage user in the region, the total number of users in the region, and the number of days in the period. The regional periodic low voltage coefficient is determined by summing the daily low voltage coefficients of all low voltage users in the region within the period, the total number of users in the region, and the number of days in the period.

Images