Method, system, device and storage medium for screening voltage quality deterioration area

Abstract

The present disclosure relates to the field of power quality detection in distribution networks, and discloses a method, system, device, and storage medium for screening substations with degraded voltage quality. The method includes: screening substations with unqualified user voltage indexes; calculating the relative entropy between the gateway voltage of the substation with unqualified user voltage indexes and the gateway voltage of the reference substation, recorded as the first relative entropy; calculating the relative entropy between the user meter voltage of the substation and the gateway voltage of the substation, recorded as the second relative entropy; based on the first relative entropy and the second relative entropy, screening out substations with degraded voltage quality from substations with unqualified user voltage indexes. The present disclosure is based on the substation gateway meter voltage and user meter voltage data in the power user electricity consumption information collection system, and maps the fact that the user voltage quality is unqualified due to factors such as three-phase imbalance in the substation and large load at the end through the change in the amount of information, thereby realizing efficient and accurate positioning and comprehensive monitoring of substations with degraded voltage quality.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power quality detection in distribution networks, and in particular to a method, system, device and storage medium for screening a voltage quality deterioration area. Background Art

[0002] In modern power systems, the voltage quality of the substation is crucial to ensure the reliability and stability of power supply. The deterioration of the voltage quality in the substation occurs from time to time, and its main factors include three-phase imbalance, large load fluctuations at the end, and distributed photovoltaic reverse power flow. Three-phase imbalance will cause differences in the voltage of each phase in the substation, causing the voltage of some users to be too high or too low, affecting the normal operation and service life of power equipment. Large load fluctuations at the end may cause a sudden drop in voltage during peak load periods and an increase in voltage during trough periods, which will have a negative impact on the user's electricity experience. With the widespread access of distributed photovoltaics in the substation, its reverse power flow has become complex and diverse. When the photovoltaic output does not match the local load, it is easy to impact the substation voltage and destroy the stability of the voltage.

[0003] At present, when dealing with the voltage quality problem in the substation, it is very limited to analyze it only by the over-limit voltage value of the voltage-unqualified users. This single numerical information cannot fully reflect the intrinsic essential cause of the voltage degradation in the substation. The voltage quality of the substation is a complex system involving the whole and the individual, the substation and the user. It is difficult to grasp the law of voltage change and the deep-seated influencing factors from a macro level by only focusing on the over-limit voltage of individual users. Summary of the invention

[0004] The embodiments of the present disclosure provide a method, system, device and storage medium for screening a substation with degraded voltage quality, so as to solve or alleviate one or more of the above technical problems in the prior art.

[0005] According to one aspect of the present disclosure, a method for screening a station area with degraded voltage quality is provided, comprising:

[0006] Screening of substations with unqualified user voltage index;

[0007] Calculate the relative entropy between the voltage at the gateway of the area where the user voltage index fails to meet the standards and the voltage at the gateway of the reference area, which is recorded as the first relative entropy;

[0008] Calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, which is recorded as the second relative entropy;

[0009] Based on the first relative entropy and the second relative entropy, the substations with deteriorated voltage quality are screened out from the substations with unqualified user voltage indexes.

[0010] In a possible implementation, screening the substations with unqualified user voltage indexes includes:

[0011] Acquire the user meter voltage data of the substation area from the power user electricity consumption information collection system, wherein the user meter voltage data of the substation area includes the number of qualified meter voltages and the total number of voltages;

[0012] Calculating the user voltage index according to the number of qualified voltages of the meters and the total number of voltages;

[0013] According to the user voltage index, the substations with unqualified user voltage index are screened.

[0014] In a possible implementation, screening the substations with unqualified user voltage indexes according to the user voltage indexes includes:

[0015] Set voltage index threshold;

[0016] The user voltage index is compared with the voltage index threshold, and the substations to which users whose voltage index is less than the voltage index threshold belong are screened out as substations with unqualified user voltage index.

[0017] In a possible implementation, calculating the relative entropy between the gateway voltage of the area where the user voltage index fails to meet the standards and the gateway voltage of the reference area includes:

[0018] Obtain the voltage data of the gateway meter in the substation area from the power user's power consumption information collection system;

[0019] Rounding off the voltage data of the gateway meter in the substation area;

[0020] Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated;

[0021] Filter out a reference substation according to the voltage variance of each substation gateway table and the user voltage index;

[0022] According to the probability of occurrence of each substation gateway meter voltage value and the probability of occurrence of the reference substation gateway meter voltage value, the relative entropy of the substation gateway voltage with unqualified user voltage index and the reference substation gateway voltage is calculated.

[0023] In a possible implementation, the substation gateway meter voltage data includes the number of different voltage values ​​of each substation gateway meter, the total number of substation gateway meter voltage values, and the gateway meter voltage value of each substation;

[0024] Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated, including:

[0025] Calculate the probability of occurrence of each area gateway meter voltage value according to the number of different voltage values ​​of each area gateway meter and the total number of area gateway meter voltage values;

[0026] Calculate the average voltage of the gateway meter of each substation according to the probability of occurrence of the voltage value of the gateway meter of each substation and the voltage value of the gateway meter of each substation;

[0027] The variance of the voltage at the gateway meter of each substation is calculated according to the number of different voltage values ​​of the gateway meter of each substation, the voltage value of the gateway meter of each substation and the average voltage of the gateway meter of each substation.

[0028] In a possible implementation, the relative entropy between the user meter voltage in the substation area and the substation gateway voltage is calculated, including:

[0029] Rounding off the voltage data of the user meters in the substation area, wherein the voltage data of the user meters in the substation area includes the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area;

[0030] Calculate the probability of occurrence of each voltage value of the user meter according to the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area;

[0031] According to the probability of occurrence of each voltage value of the user meter and the probability of occurrence of each substation gateway meter voltage value, the relative entropy of the substation user meter voltage and the substation gateway voltage is calculated.

[0032] In a possible implementation, based on the first relative entropy and the second relative entropy, screening out the area with degraded voltage quality from the area with unqualified user voltage index includes:

[0033] Setting a first relative entropy threshold and a second relative entropy threshold;

[0034] The user voltage index unqualified substations whose first relative entropy is less than the first relative entropy threshold and whose second relative entropy is greater than the second relative entropy threshold are screened out as the voltage quality deteriorated substations.

[0035] According to one aspect of the present disclosure, a system for screening a station area with degraded voltage quality is provided, comprising:

[0036] The first screening unit is used to screen the user voltage index unqualified areas;

[0037] A first calculation unit is used to calculate the relative entropy between the gateway voltage of the area where the user voltage index fails to meet the standards and the gateway voltage of the reference area, which is recorded as the first relative entropy;

[0038] The second calculation unit is used to calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, which is recorded as the second relative entropy;

[0039] The second screening unit is used to screen out the voltage quality deteriorated areas from the user voltage index unqualified areas based on the first relative entropy and the second relative entropy.

[0040] In a possible implementation, the first screening unit includes:

[0041] An acquisition module is used to acquire the voltage data of the user meters in the substation area from the power user power consumption information collection system, wherein the voltage data of the user meters in the substation area includes the number of qualified meter voltages and the total number of voltages;

[0042] A first calculation module is used to calculate a user voltage index according to the number of qualified voltages of the meters and the total number of voltages;

[0043] The screening module is used to screen the areas where the user voltage index is unqualified according to the user voltage index.

[0044] In a possible implementation, the screening module includes:

[0045] A setting submodule, used to set a voltage index threshold;

[0046] The comparison submodule is used to compare the user voltage index with the voltage index threshold, and screen out the substations to which users whose voltage index is less than the voltage index threshold belong as substations with unqualified user voltage index.

[0047] In a possible implementation, the first computing unit includes:

[0048] The second acquisition module is used to obtain the voltage data of the gateway meter in the substation area from the power user power consumption information collection system;

[0049] The first processing module is used to perform rounding processing on the voltage data of the gateway meter in the substation area;

[0050] The second calculation module is used to calculate the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage based on the rounded area gateway meter voltage data;

[0051] A first screening module is used to screen out a reference substation according to the voltage variance of each substation gateway table and the user voltage index;

[0052] The third calculation module is used to calculate the relative entropy between the gateway voltage of the substation with unqualified user voltage index and the gateway voltage of the reference substation according to the probability of occurrence of the gateway voltage value of each substation and the probability of occurrence of the reference substation gateway voltage value.

[0053] In a possible implementation, the substation gateway meter voltage data includes the number of different voltage values ​​of each substation gateway meter, the total number of substation gateway meter voltage values, and the gateway meter voltage value of each substation;

[0054] The second calculation module includes:

[0055] A first calculation submodule, configured to calculate the probability of occurrence of the voltage value of each substation gateway table according to the number of different voltage values ​​of each substation gateway table and the total number of voltage values ​​of the substation gateway table;

[0056] The second calculation submodule is used to calculate the average value of the gateway meter voltage of each substation according to the probability of occurrence of the gateway meter voltage value of each substation and the gateway meter voltage value of each substation;

[0057] The third calculation submodule is used to calculate the variance of the voltage of each substation gateway meter according to the number of different voltage values ​​of each substation gateway meter, the voltage value of the gateway meter of each substation and the average voltage of each substation gateway meter.

[0058] In a possible implementation, the second computing unit includes:

[0059] The second processing module is used to perform rounding processing on the voltage data of the user meters in the substation area, wherein the voltage data of the user meters in the substation area includes the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area;

[0060] A fourth calculation module, used for calculating the probability of occurrence of each voltage value of the user meter according to the number of each voltage value of each user in each substation and the total number of all voltage values ​​of each user in each substation;

[0061] The fifth calculation module is used to calculate the relative entropy between the user meter voltage in the substation and the substation gateway voltage according to the probability of occurrence of each voltage value of the user meter and the probability of occurrence of the voltage value of each substation gateway meter.

[0062] In a possible implementation, the second screening unit includes:

[0063] A setting module, used for setting a first relative entropy threshold and a second relative entropy threshold;

[0064] The second screening module is used to screen out user voltage index unqualified areas whose first relative entropy is less than the first relative entropy threshold and whose second relative entropy is greater than the second relative entropy threshold as voltage quality deteriorated areas.

[0065] According to one aspect of the present disclosure, there is provided a device, comprising:

[0066] Processor and memory;

[0067] The memory is used to store a computer program, and the processor calls the computer program stored in the memory to execute any one of the above methods for screening a voltage quality deterioration station area.

[0068] According to one aspect of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed by a processor, the processor is enabled to execute any of the above-mentioned methods for screening a voltage quality degraded station area.

[0069] The present disclosure has the following beneficial effects: the present disclosure provides a method for batch screening of substations with deteriorated voltage quality, focusing on solving the problems of low efficiency in positioning substations with deteriorated voltage quality and incomplete monitoring under traditional methods; based on the substation gateway meter voltage and user meter voltage data in the power user electricity consumption information collection system, a relative entropy calculation model for voltage probability distribution is constructed, and the fact that factors such as three-phase imbalance in the substation and heavy load at the end lead to unqualified user voltage quality is mapped through changes in the amount of information, thereby achieving efficient and accurate positioning and comprehensive monitoring of substations with deteriorated voltage quality.

[0070] The details of one or more embodiments of the present application are presented in the following drawings and descriptions. Other features and advantages of the present application will become apparent from the accompanying drawings. It should be understood that the above general description and the detailed descriptions below are only exemplary and explanatory and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0072] Figure 1 is a flow chart of a method for screening a station area with deteriorated voltage quality according to the exemplary embodiment;

[0073] Figure 2 is a flow chart of a method for batch screening of voltage quality deteriorated areas according to the exemplary embodiment;

[0074] Figure 3 is a block diagram of a system for screening a station area for voltage quality degradation according to the exemplary embodiment;

[0075] Figure 4 It is a schematic structural diagram of a device of this exemplary embodiment. DETAILED DESCRIPTION

[0076] 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 being limited to the examples set forth herein; on the contrary, these embodiments are provided so that the present disclosure will be more comprehensive and complete, and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0077] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware units or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0078] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the steps. For example, some steps may be decomposed, while some steps may be combined or partially combined, so the actual execution order may change according to the actual situation.

[0079] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0080] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or sub-modules is not necessarily limited to those steps or sub-modules explicitly listed, but may include other steps or sub-modules not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0081] Figure 1 is a flow chart of a method for screening a voltage quality deterioration area according to the exemplary embodiment. Figure 1As shown, an exemplary embodiment of the present disclosure provides a method for screening a station area with deteriorated voltage quality, comprising:

[0082] Screening of substations with unqualified user voltage index;

[0083] Calculate the relative entropy between the voltage at the gateway of the area where the user voltage index fails to meet the standards and the voltage at the gateway of the reference area, which is recorded as the first relative entropy;

[0084] Calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, which is recorded as the second relative entropy;

[0085] Based on the first relative entropy and the second relative entropy, the substations with deteriorated voltage quality are screened out from the substations with unqualified user voltage indexes.

[0086] It is worth noting that the traditional manual monitoring and extensive management mode can hardly meet the growing demand for electricity, and the management and monitoring of power supply need to be transformed into a more refined and intelligent direction. The power user electricity consumption information collection system came into being and gradually became popular. By using digital technology, the rich voltage data covered by the power user electricity consumption information collection system can be processed, and a relative entropy calculation model such as voltage probability distribution can be established, realizing the transformation from the traditional empirical judgment of voltage quality problems to data-driven, precise quantitative analysis, greatly improving the efficiency and accuracy of locating the voltage quality deterioration area.

[0087] In order to locate the substation with deteriorated voltage quality more accurately, it is necessary to study the voltage distribution relationship between the substation and the user in a statistical sense. In this way, the distribution characteristics of the voltage in the substation can be fully understood, and the root causes of the voltage quality problems hidden behind a large amount of data can be excavated. The concept of relative entropy is of great significance in this study. It can characterize factors that strongly interfere with the voltage, such as three-phase imbalance and large load fluctuations at the end, through changes in the amount of information. Relative entropy can quantify the difference between two probability distributions, thereby providing an effective means for analyzing changes in voltage distribution, helping to accurately identify the key factors that cause voltage quality degradation in complex substation voltage systems, and then provide a strong basis for taking targeted improvement measures to improve the voltage quality of the substation.

[0088] This embodiment identifies voltage quality problems by constructing a relative entropy calculation model of voltage probability distribution, which has high accuracy. It uses digital technology to batch screen voltage quality deteriorated substations based on voltage data in the power user electricity consumption information collection system, thereby improving detection efficiency. It closely focuses on the screening problem of voltage quality deteriorated substations in the power system, provides rigorous implementation steps and a clear calculation model, and the provided method has strong practicality and operability.

[0089] like Figure 2Specifically, screening of user voltage index unqualified areas includes:

[0090] Acquire the user meter voltage data of the substation area from the power user electricity consumption information collection system, wherein the user meter voltage data of the substation area includes the number of qualified meter voltages and the total number of voltages;

[0091] Calculating the user voltage index according to the number of qualified voltages of the meters and the total number of voltages;

[0092] According to the user voltage index, the substations with unqualified user voltage index are screened.

[0093] Specifically, according to the user voltage index, screening the area where the user voltage index is unqualified includes:

[0094] Set voltage index threshold;

[0095] The user voltage index is compared with the voltage index threshold, and the substations to which users whose voltage index is less than the voltage index threshold belong are screened out as substations with unqualified user voltage index.

[0096] like Figure 2 As shown, in this embodiment, the areas where the user voltage index is unqualified for screening specifically include:

[0097] (1) In order to ensure the timeliness of the screening results, the meter voltage data of the target low-voltage user group at the set time (for example, the last three months) is selected as the analysis basis, and the meter voltage data of the target low-voltage user group at the set time in the power user electricity consumption information collection system is exported to the database;

[0098] (2) Calculate the voltage index of each user using the following formula:

[0099] ;

[0100] Where: i For the i Users; I is the total number of users; δ ( i ) is the i Voltage index of each user; N HG ( i ) is the i The number of users whose meter voltage is qualified. According to the national standard "Power Quality Supply Voltage Deviation" (GB / T 12325-2008), the 220V single-phase power supply voltage deviation is +7%, -10% of the nominal voltage; N ( i ) is the i The total number of user voltages.

[0101] (3) Screening out voltage index δ ( i ) is less than the voltage index threshold (for example, the voltage index threshold is set to 95%), that is, the user voltage index unqualified area.

[0102] Specifically, the relative entropy between the gateway voltage of the area where the user voltage index is unqualified and the gateway voltage of the reference area is calculated, including:

[0103] Obtain the voltage data of the gateway meter in the substation area from the power user's power consumption information collection system;

[0104] Rounding off the voltage data of the gateway meter in the substation area;

[0105] Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated;

[0106] Filter out a reference substation according to the voltage variance of each substation gateway table and the user voltage index;

[0107] According to the probability of occurrence of each substation gateway meter voltage value and the probability of occurrence of the reference substation gateway meter voltage value, the relative entropy of the substation gateway voltage with unqualified user voltage index and the reference substation gateway voltage is calculated.

[0108] Specifically, the said gateway meter voltage data of the substation includes the number of different voltage values ​​of each substation gateway meter, the total number of the gateway meter voltage values ​​of the substation and the gateway meter voltage value of each substation;

[0109] Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated, including:

[0110] Calculate the probability of occurrence of each area gateway meter voltage value according to the number of different voltage values ​​of each area gateway meter and the total number of area gateway meter voltage values;

[0111] Calculate the average voltage of the gateway meter of each substation according to the probability of occurrence of the voltage value of the gateway meter of each substation and the voltage value of the gateway meter of each substation;

[0112] The variance of the voltage at the gateway meter of each substation is calculated according to the number of different voltage values ​​of the gateway meter of each substation, the voltage value of the gateway meter of each substation and the average voltage of the gateway meter of each substation.

[0113] like Figure 2 As shown, in this embodiment, the relative entropy between the gateway voltage of the user voltage index unqualified area and the gateway voltage of the reference area of ​​the same line is calculated, including:

[0114] (1) Export the voltage data of the gateway meter in the power user's power consumption information collection system for a set time (e.g., the last three months) to the database;

[0115] (2) Rounding off the voltage data of all the gateway meters in the substation area can be done by rounding off, rounding up or rounding down;

[0116] (3) Calculate the probability of the voltage value at each substation. The calculation formula is:

[0117] ;

[0118] Where: n For the n Areas; T is the total number of areas; j For the j Voltage value; J is the number of different voltage values; P ( n,j ) is the n The next area j The probability of the voltage value of the threshold meter appearing; N U ( n , j ) is the n The next area j The number of different voltage values ​​for each gate; N TQ ( n ) is the n The total number of meter voltages at all ports under each substation.

[0119] (4) Calculate the average voltage of each substation using the following formula:

[0120] ;

[0121] Where: For the n The average value of the voltage at the gateway of each substation; U ( n , j ) is the n The first j The voltage value of the threshold meter.

[0122] (5) Calculate the variance of the voltage at each substation using the following formula:

[0123] ;

[0124] Where: σ 2 ( n) is the n The variance of the voltage at the gateway of each substation.

[0125] (6) Select the reference substation of each 10kV distribution network power supply line in turn for calculating the relative entropy. The selection criteria for the reference substation are that the voltage variance of the gate meter under this 10kV power supply line is the smallest and the voltage index of all users in the substation is the smallest. δ ( i )=100%.

[0126] (7) Calculate the relative entropy between the substation with unqualified user voltage index and the reference substation under each 10kV distribution network power supply line in turn. The calculation formula is:

[0127] ;

[0128] Where: H ( n ) is the n The relative entropy between the station area and the reference station area; P CK ( j ) is the reference area j The probability of a voltage value occurring at each threshold.

[0129] Specifically, the relative entropy between the user meter voltage in the substation area and the substation gateway voltage is calculated, including:

[0130] Rounding off the voltage data of the user meters in the substation area, wherein the voltage data of the user meters in the substation area includes the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area;

[0131] Calculate the probability of occurrence of each voltage value of the user meter according to the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area;

[0132] According to the probability of occurrence of each voltage value of the user meter and the probability of occurrence of each substation gateway meter voltage value, the relative entropy of the substation user meter voltage and the substation gateway voltage is calculated.

[0133] like Figure 2 As shown, in this embodiment, calculating the relative entropy of the user meter voltage in the substation area and the gateway voltage of the subordinate substation area includes:

[0134] (1) All user meter voltage data shall be rounded off, rounded up or rounded down;

[0135] (2) Calculate the probability of each user's meter voltage value occurring. The calculation formula is:

[0136] ;

[0137] Where: p ( n,i,j ) is the n The first i User j The probability of a voltage value occurring; For the n The first i User j The number of voltage values; For the n The first i The total number of all voltages for each user.

[0138] (3) Calculate the relative entropy between the user meter voltage and the gateway voltage of the substation in turn. The calculation formula is:

[0139] ;

[0140] Where: h ( n , i ) is the n The first i The relative entropy between the voltage of a user meter and the voltage at the gateway of the substation.

[0141] Specifically, based on the first relative entropy and the second relative entropy, the voltage quality deteriorated area is screened out from the user voltage index unqualified area, including:

[0142] Setting a first relative entropy threshold and a second relative entropy threshold;

[0143] The user voltage index unqualified substations whose first relative entropy is less than the first relative entropy threshold and whose second relative entropy is greater than the second relative entropy threshold are screened out as the voltage quality deteriorated substations.

[0144] In this embodiment, screening out the voltage quality deteriorated areas from the areas with unqualified user voltage indexes includes: screening out the relative entropy between the area gate meter voltage and the reference area from the areas with unqualified user voltage indexes. H ( n ) is less than a first relative entropy threshold (for example, the first relative entropy threshold is set to 0.5), and a set number (for example, 30%) of users in the area have a relative entropy of more than 10% of the voltage of the user and the voltage of the gateway in the area. h ( n , i ) is greater than the second relative entropy threshold (for example, the second relative entropy threshold is set to 5), that is, the voltage quality deteriorated area.

[0145] In summary, the present disclosure provides a method for batch screening of voltage quality deterioration areas using digital technology, which solves the problems of low efficiency in locating voltage quality deterioration areas, incomplete monitoring, and difficulty in timely detection of potential risks under traditional methods.

[0146] Figure 3 is a block diagram of a system for screening a voltage quality deterioration station area according to the exemplary embodiment. Figure 3 As shown, an exemplary embodiment of the present disclosure provides a system for screening a station area with deteriorated voltage quality, comprising:

[0147] The first screening unit is used to screen the user voltage index unqualified areas;

[0148] A first calculation unit is used to calculate the relative entropy between the gateway voltage of the area where the user voltage index fails to meet the standards and the gateway voltage of the reference area, which is recorded as the first relative entropy;

[0149] The second calculation unit is used to calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, which is recorded as the second relative entropy;

[0150] The second screening unit is used to screen out the voltage quality deteriorated areas from the user voltage index unqualified areas based on the first relative entropy and the second relative entropy.

[0151] Specifically, the first screening unit includes:

[0152] An acquisition module is used to acquire the voltage data of the user meters in the substation area from the power user power consumption information collection system, wherein the voltage data of the user meters in the substation area includes the number of qualified meter voltages and the total number of voltages;

[0153] A first calculation module is used to calculate a user voltage index according to the number of qualified voltages of the meters and the total number of voltages;

[0154] The screening module is used to screen the areas where the user voltage index is unqualified according to the user voltage index.

[0155] Specifically, the screening module includes:

[0156] A setting submodule, used to set a voltage index threshold;

[0157] The comparison submodule is used to compare the user voltage index with the voltage index threshold, and screen out the substations to which users whose voltage index is less than the voltage index threshold belong as substations with unqualified user voltage index.

[0158] Specifically, the first computing unit includes:

[0159] The second acquisition module is used to obtain the voltage data of the gateway meter in the substation area from the power user power consumption information collection system;

[0160] The first processing module is used to perform rounding processing on the voltage data of the gateway meter in the substation area;

[0161] The second calculation module is used to calculate the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage based on the rounded area gateway meter voltage data;

[0162] A first screening module is used to screen out a reference substation according to the voltage variance of each substation gateway table and the user voltage index;

[0163] The third calculation module is used to calculate the relative entropy between the gateway voltage of the substation with unqualified user voltage index and the gateway voltage of the reference substation according to the probability of occurrence of the gateway voltage value of each substation and the probability of occurrence of the reference substation gateway voltage value.

[0164] Specifically, the said gateway meter voltage data of the substation includes the number of different voltage values ​​of each substation gateway meter, the total number of the gateway meter voltage values ​​of the substation and the gateway meter voltage value of each substation;

[0165] The second calculation module includes:

[0166] A first calculation submodule, configured to calculate the probability of occurrence of the voltage value of each substation gateway table according to the number of different voltage values ​​of each substation gateway table and the total number of voltage values ​​of the substation gateway table;

[0167] The second calculation submodule is used to calculate the average value of the gateway meter voltage of each substation according to the probability of occurrence of the gateway meter voltage value of each substation and the gateway meter voltage value of each substation;

[0168] The third calculation submodule is used to calculate the variance of the voltage of each substation gateway meter according to the number of different voltage values ​​of each substation gateway meter, the voltage value of the gateway meter of each substation and the average voltage of each substation gateway meter.

[0169] Specifically, the second computing unit includes:

[0170] The second processing module is used to perform rounding processing on the voltage data of the user meters in the substation area, wherein the voltage data of the user meters in the substation area includes the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area;

[0171] A fourth calculation module, used for calculating the probability of occurrence of each voltage value of the user meter according to the number of each voltage value of each user in each substation and the total number of all voltage values ​​of each user in each substation;

[0172] The fifth calculation module is used to calculate the relative entropy between the user meter voltage in the substation and the substation gateway voltage according to the probability of occurrence of each voltage value of the user meter and the probability of occurrence of the voltage value of each substation gateway meter.

[0173] Specifically, the second screening unit includes:

[0174] A setting module, used for setting a first relative entropy threshold and a second relative entropy threshold;

[0175] The second screening module is used to screen out user voltage index unqualified areas whose first relative entropy is less than the first relative entropy threshold and whose second relative entropy is greater than the second relative entropy threshold as voltage quality deteriorated areas.

[0176] Figure 4 Schematic diagram of the structure of a device of this exemplary embodiment. Figure 4 As shown, corresponding to the method for screening the voltage quality deterioration area provided above, the present disclosure also provides a device. Since the embodiment of the device is similar to the above method embodiment, the description is relatively simple. Please refer to the description of the above method embodiment for relevant points. The device described below is only schematic. The device may include: a processor (processor) 1, a memory (memory) 2 and a communication bus (that is, the above device bus) and a search engine, wherein the processor 1 and the memory 2 communicate with each other through the communication bus and communicate with the outside through the communication interface. The processor 1 can call the logic instructions in the memory 2 to execute the method for screening the voltage quality deterioration area.

[0177] In addition, the logic instructions in the above-mentioned memory 2 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present disclosure. The aforementioned storage medium includes: a storage chip, a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes.

[0178] On the other hand, an embodiment of the present disclosure further provides a processor-readable storage medium on which a computer program 3 is stored. When the computer program 3 is executed by the processor 1, the method for screening voltage quality degraded areas provided in the above embodiments is implemented.

[0179] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor 1, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD)), etc.

[0180] The above are only preferred implementations of the present disclosure, and the protection scope of the present disclosure is not limited to the above embodiments. All technical solutions under the concept of the present disclosure belong to the protection scope of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present disclosure should be regarded as the protection scope of the present disclosure.

Claims

1. A method for screening a voltage quality deterioration area, characterized in that: include: Screening the areas where the user voltage index is unqualified, where the user voltage index is the ratio of the number of users with qualified meter voltage to the total number of user voltages; Calculate the relative entropy between the gateway voltage of the area where the user voltage index fails to meet the standards and the gateway voltage of the reference area, recorded as the first relative entropy, including: Obtain the voltage data of the gateway meter in the substation area from the power user's power consumption information collection system; Rounding off the voltage data of the gateway meter in the substation area; Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated; A reference substation is selected based on the voltage variance of the gateway meter of each substation and the voltage index of the user; the selection basis of the reference substation is that the voltage variance of the gateway meter of the substation under the 10kV power supply line is the smallest and the voltage index of all users in the substation is 100%; According to the probability of occurrence of the voltage value of each substation gateway meter and the probability of occurrence of the voltage value of the reference substation gateway meter, the relative entropy between the substation gateway voltage with unqualified user voltage index and the reference substation gateway voltage is calculated; Calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, which is recorded as the second relative entropy; Based on the first relative entropy and the second relative entropy, the voltage quality deteriorated areas are screened out from the user voltage index unqualified areas, including: Setting a first relative entropy threshold and a second relative entropy threshold; The user voltage index unqualified substations whose first relative entropy is less than the first relative entropy threshold and whose second relative entropy is greater than the second relative entropy threshold are screened out as the voltage quality deteriorated substations.

2. The method for screening a voltage quality deterioration area according to claim 1, characterized in that: Screening of substations with unqualified user voltage index, including: Acquire the user meter voltage data of the substation area from the power user electricity consumption information collection system, wherein the user meter voltage data of the substation area includes the number of qualified meter voltages and the total number of voltages; Calculating the user voltage index according to the number of qualified voltages of the meters and the total number of voltages; According to the user voltage index, the substations with unqualified user voltage index are screened.

3. The method for screening a voltage quality deterioration area according to claim 2, characterized in that: According to the user voltage index, screen the substations with unqualified user voltage index, including: Set voltage index threshold; The user voltage index is compared with the voltage index threshold, and the substations to which users whose voltage index is less than the voltage index threshold belong are screened out as substations with unqualified user voltage index.

4. The method for screening a voltage quality deterioration area according to claim 1, characterized in that: The gateway meter voltage data of the substation area includes the number of different voltage values ​​of each substation area gateway meter, the total number of voltage values ​​of the gateway meter of the substation area and the voltage value of the gateway meter of each substation area; Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated, including: Calculate the probability of occurrence of each area gateway meter voltage value according to the number of different voltage values ​​of each area gateway meter and the total number of area gateway meter voltage values; Calculate the average voltage of the gateway meter of each substation according to the probability of occurrence of the voltage value of the gateway meter of each substation and the voltage value of the gateway meter of each substation; The variance of the voltage at the gateway meter of each substation is calculated according to the number of different voltage values ​​of the gateway meter of each substation, the voltage value of the gateway meter of each substation and the average voltage of the gateway meter of each substation.

5. The method for screening a voltage quality deterioration area according to claim 4, characterized in that: Calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, including: Rounding off the voltage data of the user meters in the substation area, wherein the voltage data of the user meters in the substation area includes the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area; Calculate the probability of occurrence of each voltage value of the user meter according to the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area; According to the probability of occurrence of each voltage value of the user meter and the probability of occurrence of each substation gateway meter voltage value, the relative entropy of the substation user meter voltage and the substation gateway voltage is calculated.

6. A system for screening a substation with degraded voltage quality, characterized in that: include: The first screening unit is used to screen the areas where the user voltage index is unqualified, where the user voltage index is the ratio of the number of users with qualified meter voltage to the total number of user voltages; The first calculation unit is used to calculate the relative entropy between the gateway voltage of the area where the user voltage index is unqualified and the gateway voltage of the reference area, recorded as the first relative entropy, including: Obtain the voltage data of the gateway meter in the substation area from the power user's power consumption information collection system; Rounding off the voltage data of the gateway meter in the substation area; Based on the rounded off area gateway meter voltage data, the probability of occurrence of each area gateway meter voltage value and the variance of each area gateway meter voltage are calculated; A reference substation is selected based on the voltage variance of the gateway meter of each substation and the voltage index of the user; the selection basis of the reference substation is that the voltage variance of the gateway meter of the substation under the 10kV power supply line is the smallest and the voltage index of all users in the substation is 100%; According to the probability of occurrence of the voltage value of each substation gateway meter and the probability of occurrence of the voltage value of the reference substation gateway meter, the relative entropy between the substation gateway voltage with unqualified user voltage index and the reference substation gateway voltage is calculated; The second calculation unit is used to calculate the relative entropy between the user meter voltage in the substation area and the substation gateway voltage, which is recorded as the second relative entropy; The second screening unit is used to screen out the voltage quality deteriorated area from the user voltage index unqualified area based on the first relative entropy and the second relative entropy, including: Setting a first relative entropy threshold and a second relative entropy threshold; The user voltage index unqualified substations whose first relative entropy is less than the first relative entropy threshold and whose second relative entropy is greater than the second relative entropy threshold are screened out as the voltage quality deteriorated substations.

7. The system for screening voltage quality deterioration areas according to claim 6, characterized in that: The first screening unit includes: An acquisition module is used to acquire the voltage data of the user meters in the substation area from the power user power consumption information collection system, wherein the voltage data of the user meters in the substation area includes the number of qualified meter voltages and the total number of voltages; A first calculation module is used to calculate a user voltage index according to the number of qualified voltages of the meters and the total number of voltages; The screening module is used to screen the areas where the user voltage index is unqualified according to the user voltage index.

8. The system for screening voltage quality deterioration stations according to claim 7, characterized in that: The screening modules include: A setting submodule, used to set a voltage index threshold; The comparison submodule is used to compare the user voltage index with the voltage index threshold, and screen out the substations to which users whose voltage index is less than the voltage index threshold belong as substations with unqualified user voltage index.

9. The system for screening voltage quality deterioration stations according to claim 6, characterized in that: The gateway meter voltage data of the substation area includes the number of different voltage values ​​of each substation area gateway meter, the total number of voltage values ​​of the gateway meter of the substation area and the voltage value of the gateway meter of each substation area; The second calculation module includes: A first calculation submodule, configured to calculate the probability of occurrence of the voltage value of each substation gateway table according to the number of different voltage values ​​of each substation gateway table and the total number of voltage values ​​of the substation gateway table; The second calculation submodule is used to calculate the average value of the gateway meter voltage of each substation according to the probability of occurrence of the gateway meter voltage value of each substation and the gateway meter voltage value of each substation; The third calculation submodule is used to calculate the variance of the voltage of each substation gateway meter according to the number of different voltage values ​​of each substation gateway meter, the voltage value of the gateway meter of each substation and the average voltage of each substation gateway meter.

10. The system for screening voltage quality deterioration stations according to claim 9, characterized in that: The second computing unit comprises: The second processing module is used to perform rounding processing on the voltage data of the user meters in the substation area, wherein the voltage data of the user meters in the substation area includes the number of each voltage value of each user in each substation area and the total number of all voltage values ​​of each user in each substation area; A fourth calculation module, used for calculating the probability of occurrence of each voltage value of the user meter according to the number of each voltage value of each user in each substation and the total number of all voltage values ​​of each user in each substation; The fifth calculation module is used to calculate the relative entropy between the user meter voltage in the substation and the substation gateway voltage according to the probability of occurrence of each voltage value of the user meter and the probability of occurrence of the voltage value of each substation gateway meter.

11. An electronic device, characterized in that: include: Processor and memory; The memory is used to store a computer program, and the processor calls the computer program stored in the memory to execute the method for screening a voltage quality degraded area according to any one of claims 1 to 5.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor is enabled to execute the method for screening a voltage quality degraded station area according to any one of claims 1 to 5.

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