A low-voltage area line loss rate analysis method, device, equipment and storage medium

Abstract

The application discloses a low-voltage transformer area line loss rate analysis method, device, equipment and storage medium, the method comprises the following steps: obtaining the ideal line loss rate of the transformer in the ideal operation state of three-phase balance; using the preset phase equivalent resistance method to calculate the theoretical line loss rate according to the preset transformer area line loss related data; based on the ideal line loss rate, the theoretical line loss rate and the preset statistical line loss rate, the statistical deviation index and the technical deviation index are calculated respectively; according to the statistical deviation index, the technical deviation index and the deviation threshold, the management line loss measure and the technical line loss measure analysis are carried out, and the analysis result is obtained. The application can solve the technical problems that the existing technology cannot quantitatively analyze the line loss anomaly of the low-voltage transformer area, and the line loss analysis effect and the treatment scheme are poor.

Description

Technical Field

[0001] This application relates to the field of power system technology, and in particular to a method, apparatus, equipment and storage medium for analyzing line loss rate in low-voltage distribution areas. Background Technology

[0002] Against this macroeconomic backdrop, power supply companies are placing greater emphasis on energy conservation and loss reduction. In low-voltage distribution networks directly connected to users, losses account for over 60% of total grid losses due to their wide coverage, numerous distribution devices, and complex and dense wiring. As the final link in the power system, the line loss rate of low-voltage distribution areas (i.e., the power supply range of transformers) is a crucial performance indicator for distribution area management. Accurately and quickly determining the line loss rate of low-voltage distribution areas, precisely locating the causes of anomalies, rapidly developing remediation plans, and promptly conducting effectiveness analysis have always been key focuses for the industry.

[0003] However, existing line loss analysis methods cannot accurately reflect the technical line loss situation of the power grid. Moreover, the statistical line loss rate and theoretical line loss rate can only identify problems of improper operation and maintenance management in low-voltage distribution areas, but cannot achieve accurate quantitative analysis and obtain clear analysis results. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, and storage medium for analyzing line loss rates in low-voltage distribution areas, which solves the technical problem that existing technologies cannot quantitatively analyze line loss anomalies in low-voltage distribution areas, resulting in poor line loss analysis effects and remediation solutions.

[0005] In view of this, the first aspect of this application provides a method for analyzing the line loss rate of low-voltage distribution areas, including:

[0006] Obtain the ideal line loss rate of the transformer under ideal three-phase balanced operating conditions;

[0007] The theoretical line loss rate is calculated based on the preset phase-by-phase equal resistance method and the preset transformer area line loss data.

[0008] Statistical deviation index and technical deviation index are calculated based on the ideal line loss rate, the theoretical line loss rate and the preset statistical line loss rate, respectively.

[0009] Based on the statistical deviation index, the technical deviation index, and the deviation threshold, the management line loss measures and technical line loss measures are analyzed to obtain the analysis results.

[0010] Preferably, obtaining the ideal line loss rate of the transformer under ideal three-phase balanced operating conditions includes:

[0011] Based on a preset ideal line loss formula, the ideal line loss rate is calculated using the three-phase current and the equivalent line resistance under ideal three-phase balanced operation of the transformer. The preset ideal line loss formula is expressed as follows:

[0012]

[0013] Among them, I A I B I C R is the three-phase current. L I is the equivalent resistance of the line. av This represents the equal current in the three phases when they are in equilibrium.

[0014] Preferably, the step of calculating the theoretical line loss rate based on preset transformer area line loss data using the preset phase-by-phase equal resistance method further includes:

[0015] Obtain statistical line loss data and transformer operation data for the transformer area;

[0016] The statistical line loss data and the transformer area operation data are subjected to data quality verification, and invalid data is removed to obtain the preset transformer area line loss related data.

[0017] Preferably, the step of analyzing management line loss measures and technical line loss measures based on the statistical deviation index, the technical deviation index, and the deviation threshold to obtain analysis results includes:

[0018] The deviation thresholds include a first deviation threshold and a second deviation threshold;

[0019] If the statistical deviation index is greater than the first deviation threshold, the management line loss measures are deemed unqualified, and the management line loss plan is adjusted and updated.

[0020] If the technical deviation index is greater than the second deviation threshold, the technical line loss measures are deemed unqualified, and the technical line loss plan is adjusted and updated.

[0021] If the statistical deviation index is less than the first deviation threshold, and the technical deviation index is less than the second deviation threshold, and the preset statistical line loss rate is unqualified, then the technical line loss scheme is updated according to the method of adjusting transformer parameters and layout.

[0022] A second aspect of this application provides a low-voltage distribution area line loss rate analysis device, comprising:

[0023] The data acquisition module is used to obtain the ideal line loss rate of the transformer under ideal three-phase balanced operating conditions;

[0024] The line loss calculation module is used to calculate the theoretical line loss rate based on the preset phase equal resistance method and the preset transformer area line loss data.

[0025] The deviation calculation module is used to calculate the statistical deviation index and the technical deviation index based on the ideal line loss rate, the theoretical line loss rate and the preset statistical line loss rate, respectively.

[0026] The line loss analysis module is used to analyze management line loss measures and technical line loss measures based on the statistical deviation index, the technical deviation index and the deviation threshold, and obtain analysis results.

[0027] Preferably, the data acquisition module is specifically used for:

[0028] Based on a preset ideal line loss formula, the ideal line loss rate is calculated using the three-phase current and the equivalent line resistance under ideal three-phase balanced operation of the transformer. The preset ideal line loss formula is expressed as follows:

[0029]

[0030] Among them, I A I B I C R is the three-phase current. L I is the equivalent resistance of the line. av This represents the equal current in the three phases when they are in equilibrium.

[0031] Preferably, it further includes:

[0032] The data preparation module is used to obtain statistical line loss data and operational data of the transformer substations.

[0033] The data verification module is used to verify the data quality of the statistical line loss data and the transformer area operation data, and to remove invalid data to obtain the preset transformer area line loss related data.

[0034] Preferably, the line loss analysis module is specifically used for:

[0035] The deviation thresholds include a first deviation threshold and a second deviation threshold;

[0036] If the statistical deviation index is greater than the first deviation threshold, the management line loss measures are deemed unqualified, and the management line loss plan is adjusted and updated.

[0037] If the technical deviation index is greater than the second deviation threshold, the technical line loss measures are deemed unqualified, and the technical line loss plan is adjusted and updated.

[0038] If the statistical deviation index is less than the first deviation threshold, and the technical deviation index is less than the second deviation threshold, and the preset statistical line loss rate is unqualified, then the technical line loss scheme is updated according to the method of adjusting transformer parameters and layout.

[0039] A third aspect of this application provides a low-voltage distribution area line loss rate analysis device, the device including a processor and a memory;

[0040] The memory is used to store program code and transmit the program code to the processor;

[0041] The processor is used to execute the low-voltage distribution area line loss rate analysis method described in the first aspect according to the instructions in the program code.

[0042] The fourth aspect of this application provides a computer-readable storage medium for storing program code for executing the low-voltage distribution area line loss rate analysis method described in the first aspect.

[0043] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0044] This application provides a method for analyzing the line loss rate of low-voltage distribution areas, including: obtaining the ideal line loss rate of the transformer under ideal three-phase balanced operation; calculating the theoretical line loss rate based on preset distribution area line loss data using the preset phase-by-phase equivalent resistance method; calculating the statistical deviation index and technical deviation index based on the ideal line loss rate, theoretical line loss rate, and preset statistical line loss rate; and analyzing management line loss measures and technical line loss measures based on the statistical deviation index, technical deviation index, and deviation threshold to obtain the analysis results.

[0045] The low-voltage distribution area line loss rate analysis method provided in this application introduces an ideal line loss rate to conduct targeted analysis of abnormal line losses in low-voltage distribution areas, based on the original statistical and theoretical line loss rates. This method can distinguish between management line losses and technical line losses for quantitative analysis. The analysis results obtained through this strategy are not only accurate and reliable but also effectively reduce line losses and save energy. Therefore, this application solves the technical problem that existing technologies cannot quantitatively analyze abnormal line losses in low-voltage distribution areas, resulting in poor line loss analysis effects and ineffective mitigation solutions. Attached Figure Description

[0046] Figure 1 A flowchart illustrating a low-voltage distribution area line loss rate analysis method provided in this application embodiment;

[0047] Figure 2 A schematic diagram of a low-voltage distribution area line loss rate analysis device provided in this application embodiment;

[0048] Figure 3 The simulation curves provided for the embodiments of this application are shown. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0050] For easier understanding, please refer to Figure 1 An embodiment of a low-voltage distribution area line loss rate analysis method provided in this application includes:

[0051] Step 101: Obtain the ideal line loss rate of the transformer under ideal three-phase balanced operating conditions.

[0052] Further, step 101 includes:

[0053] Based on the preset ideal line loss formula, the ideal line loss rate is calculated according to the three-phase current and the equivalent line resistance under the ideal three-phase balanced operation state of the transformer. The preset ideal line loss formula is expressed as:

[0054]

[0055] Among them, I A I B I C For three-phase current, R L I is the equivalent resistance of the line. av This represents the equal current in the three phases when they are in equilibrium.

[0056] To further analyze the causes of power loss in low-voltage distribution areas, an ideal line loss calculation model is introduced. In low-voltage distribution networks, due to the impedance of the lines, the current flowing through the transmission lines will inevitably consume some electrical energy. Under ideal conditions, the three-phase currents in the distribution area are balanced and the load is evenly distributed. The ideal line loss P under ideal operating conditions can be calculated using the above formula. L Dividing the ideal line loss by the transformer capacity and load factor yields the ideal line loss rate, specifically expressed as: P L / (S*r), where S is the transformer capacity and r is the load rate; this part is a routine calculation process, so it does not need to be elaborated.

[0057] From the above formulas, it is easy to analyze that the ideal line loss rate is related to the magnitude of the three-phase current in the transformer substation and the equivalent resistance of the line. The equivalent resistance of the line is determined by parameters such as conductor type, power supply radius, and power supply circuit. The magnitude of the three-phase current can be obtained from the transformer capacity and load factor. To more intuitively obtain the relationship between the ideal line loss rate and design parameters such as transformer capacity and transformer substation topology, this embodiment uses MATLAB numerical simulation for analysis and calculation. The selected examples are shown in Table 1, and the calculation results are as follows: Figure 3 As shown. The equivalent resistance of the BLV240 conductor is 0.754 ohms / km, and the open-laid current carrying capacity is 460A. Furthermore, the power supply radius of a 0.4kV line should not exceed 300 meters in urban areas and 500 meters in suburban areas. The obtained information is transformed into the following: the line type Y of the transformer substation, the power supply radius X, the unit length Km, the power supply circuit H, the line impedance r corresponding to different line types (in ohms / km), the transformer capacity S (in kVA), and the transformer load rate p (in %). Based on the above ideal line loss rate calculation formula, parameter simplification yields: (S×p×X×r) / (14520H).

[0058] Table 1 List of relevant parameters for the case study

[0059]

[0060]

[0061] Please see Figure 3 Based on the simulation results of Examples 1-10, it can be seen that as the transformer load rate increases, the ideal line loss rate also increases, and the larger the transformer capacity, the more significant the increase in the ideal line loss rate with the load rate. Comparing Examples 1 and 2, 3, 4 and 5, and 8, 9 and 10, it can be found that when the power supply radius, power supply circuits, conductor specifications, and transformer load rate are constant, the larger the transformer capacity, the larger the ideal line loss rate. Comparing Examples 5, 6, and 7, it can be found that when the transformer capacity and load rate are constant, the larger the transformer power supply radius, the larger the ideal line loss rate. Comparing Examples 5 and 8, it can be found that when the transformer capacity, load rate, and power supply radius are constant, the more power supply circuits the transformer has, the smaller the ideal line loss rate.

[0062] Step 102: Calculate the theoretical line loss rate based on the preset phase equal resistance method and relevant data of the transformer area line loss.

[0063] The preset line loss data includes various parameters needed for calculating theoretical line loss rates. Specific parameters can be selected based on actual conditions and are not limited here. The theoretical line loss calculated using the phase-by-phase equivalent resistance method can be expressed as:

[0064]

[0065] Wherein, ΔA is the line loss of the low-voltage distribution area, in kWh; N is the power grid structure coefficient of the low-voltage outlet of the distribution transformer, which is 2 for single-phase power supply, 3 for three-phase three-wire system, and 3.5 for three-phase four-wire system; k is the shape coefficient, which is related to the load curve of the distribution area; I av R represents the average current at the beginning of the line, in amperes (A). eqL Equivalent resistance of low-voltage lines, unit: ohm; K bΔA is the ratio of losses under unbalanced three-phase load to losses under balanced three-phase load; T is the operating time in hours; D is the number of calendar days in a month; ΔA dbi The monthly loss of the i-th type of electricity meter is expressed in kWh; m i Let ΔA be the number of energy meters of type i; c The unit for reactive power compensation equipment losses is kWh. And:

[0066]

[0067] Where, N j A is the power grid structure coefficient for the line loss of the j-th segment; j·∑ The sum of electricity meter readings for users supplying power to the j-th calculation line segment, in kWh; R j Calculate the resistance of the j-th line segment, in ohms; m is the number of user electricity meters; A i Let represent the electricity consumption read by the i-th user's meter, in kWh. Based on the above method, the theoretical line loss rate can be calculated. The theoretical line loss rate is calculated by dividing the theoretical line loss ΔA by the product of the transformer capacity and the load rate, i.e., ΔA / (S*r).

[0068] Furthermore, step 102, preceding the following, also includes:

[0069] Obtain statistical line loss data and transformer operation data for the transformer area;

[0070] Data quality is checked on statistical line loss data and transformer operation data, and invalid data is removed to obtain the preset transformer area line loss related data.

[0071] The statistical line loss data and transformer operation data obtained mainly include information such as current, voltage, load rate, power supply radius and transformer topology. It may also include loss parameters during three-phase imbalance, monthly energy meter loss, etc. The specific data can be selectively obtained according to the research process, and no restrictions are imposed here.

[0072] To improve data quality and facilitate subsequent data calculation and analysis, this embodiment performs a quality check on the acquired data, removing invalid data with a completeness rate of less than 100%, and obtaining high-quality preset transformer area line loss related data.

[0073] Step 103: Calculate the statistical deviation index and technical deviation index based on the ideal line loss rate, theoretical line loss rate and preset statistical line loss rate respectively.

[0074] The preset statistical line loss rate refers to the energy loss between the transformer's low-voltage main meter and all low-voltage user-end meters, which can be directly obtained through the metering system. Due to the unavoidable energy losses caused by theft, leakage, loss, and misfiring during the power supply and consumption process, the deviation in energy caused by these factors can be either positive or negative, and its magnitude will be reflected in the actual measured value of the line loss.

[0075] The statistical deviation index is expressed as the ratio of the preset statistical line loss rate to the theoretical line loss rate, while the technical deviation index is expressed as the ratio of the theoretical line loss rate to the ideal line loss rate. The statistical deviation index is denoted as δ1, and the technical deviation index is denoted as δ2.

[0076] Step 104: Analyze management line loss measures and technical line loss measures based on statistical deviation index, technical deviation index and deviation threshold, and obtain the analysis results.

[0077] Further, step 104 includes:

[0078] The deviation thresholds include a first deviation threshold and a second deviation threshold;

[0079] If the statistical deviation index is greater than the first deviation threshold, the management of line loss measures is deemed unqualified, and the management of line loss plan is adjusted and updated.

[0080] If the technical deviation index is greater than the second deviation threshold, the technical line loss measures are deemed unqualified, and the technical line loss plan is adjusted and updated.

[0081] If the statistical deviation index is less than the first deviation threshold and the technical deviation index is less than the second deviation threshold, and the preset statistical line loss rate is unqualified, then the technical line loss scheme will be updated according to the method of adjusting transformer parameters and layout.

[0082] The calculated statistical deviation index is denoted as δ1, and the technical deviation index is denoted as δ2. A comparative analysis is then performed using the corresponding first deviation threshold α1 and second deviation threshold α2.

[0083] If δ1 > α1, then the line loss management of the transformer area is inadequate, and the various power losses caused by theft, leakage, loss, and transmission during the power supply and consumption process are too high. In other words, the line loss management measures are not up to standard, and it is necessary to focus on reducing line loss management measures and updating the line loss management plan.

[0084] If δ2 > α2, it indicates that the unnecessary line loss caused by technical operation in the transformer area is too high. For example, if the high line loss is caused by the imbalance of three-phase load, it means that the technical line loss measures are not up to standard. Technical measures should be taken to reduce the technical line loss and the technical line loss plan should be updated.

[0085] If δ1 < α1 and δ2 < α2, but the statistical line loss rate is still too high, it means that the ideal line loss rate of the transformer area is already too high. The main reason for the power loss is the increase in the equivalent resistance of the line and the increase in the transformer load. At this time, it is necessary to reduce the line loss rate through technical means, so it is necessary to adjust the technical line loss scheme.

[0086] It should be noted that for updated line loss solutions, the distribution of three-phase loads can be balanced to achieve a more uniform distribution. However, in three-phase four-wire low-voltage power supply systems, the uneven distribution of current due to significant differences in power allocation at the grid user end increases line losses. New technologies and methods can be used to minimize leakage and promote the digital transformation of line loss management. For example, new anti-electricity theft technologies and methods can be used to develop and promote automatic monitoring of abnormal power consumption, promptly identifying and addressing issues such as customer voltage and current loss, three-phase imbalance, low power factor, and electricity theft; power line carrier technology can be used to accurately investigate transformer-household relationships and improve transformer topology information.

[0087] Regarding institutionalized management, this refers to the implementation of a routine and refined control system for line loss based on relevant company regulations:

[0088] 1) Periodically monitor equipment such as electricity meters and transformers to promptly detect problems such as abnormal counting, failure to rotate, or tampering by unscrupulous individuals, and find the cause to quickly and effectively change, debug, or replace them.

[0089] 2) Clearly define the requirements for synchronous meter reading to ensure the accuracy of meter reading, the rigor of calculation, and the synchronization of data.

[0090] 3) Strengthen the operation and management of the metering automation system and improve the automatic meter reading rate.

[0091] 4) Strengthen the management of basic archives in the transformer substation area, conduct a comprehensive investigation of the substation area topology information, and clear up changes in household registration relationships.

[0092] 5) Strengthen the investigation and punishment of theft and crack down on collusion between internal and external parties.

[0093] If δ1 < α1 and δ2 < α2, but the statistical line loss rate is still high, the following methods can be considered to reduce line loss and adjust the technical line loss scheme:

[0094] 1) Distribute transformers and lay out circuits as reasonably as possible, and place transformers in the center of the complex to reduce the low-voltage power supply radius and thus reduce line losses.

[0095] 2) Rationally configure transformer specifications and capacity, replace with energy-saving transformers, and ensure that the newly configured distribution transformers meet or exceed the energy consumption standards of Level II, thereby reducing transformer iron loss and copper loss.

[0096] 3) Choose the wire diameter as reasonably as possible to reduce the line resistance and thus reduce line loss.

[0097] 4) Monitor the operation of the transformer to avoid long-term overload operation. The higher the transformer load rate, the greater its losses.

[0098] The low-voltage distribution area line loss rate analysis method provided in this application introduces an ideal line loss rate to conduct targeted analysis of abnormal line losses in low-voltage distribution areas, based on the original statistical and theoretical line loss rates. This method can distinguish between management line losses and technical line losses for quantitative analysis. The analysis results obtained through this strategy are not only accurate and reliable but also effectively reduce line losses and save energy. Therefore, this application embodiment can solve the technical problem that existing technologies cannot quantitatively analyze abnormal line losses in low-voltage distribution areas, resulting in poor line loss analysis effects and ineffective mitigation solutions.

[0099] For easier understanding, please refer to Figure 2 This application provides an embodiment of a low-voltage distribution area line loss rate analysis device, comprising:

[0100] Data acquisition module 201 is used to acquire the ideal line loss rate of the transformer under ideal three-phase balanced operating conditions;

[0101] Line loss calculation module 202 is used to calculate the theoretical line loss rate based on preset transformer area line loss data using the preset phase equal resistance method;

[0102] The deviation calculation module 203 is used to calculate the statistical deviation index and the technical deviation index based on the ideal line loss rate, the theoretical line loss rate and the preset statistical line loss rate, respectively.

[0103] The line loss analysis module 204 is used to analyze management line loss measures and technical line loss measures based on statistical deviation index, technical deviation index and deviation threshold, and obtain analysis results.

[0104] Furthermore, the data acquisition module 201 is specifically used for:

[0105] Based on the preset ideal line loss formula, the ideal line loss rate is calculated according to the three-phase current and the equivalent line resistance under the ideal three-phase balanced operation state of the transformer. The preset ideal line loss formula is expressed as:

[0106]

[0107] Among them, I A I B I C For three-phase current, R L I is the equivalent resistance of the line. av This represents the equal current in the three phases when they are in equilibrium.

[0108] Furthermore, it also includes:

[0109] Data preparation module 205 is used to acquire statistical line loss data and operating data of the transformer area;

[0110] The data verification module 206 is used to verify the data quality of statistical line loss data and transformer operation data, and remove invalid data to obtain preset transformer line loss related data.

[0111] Furthermore, the line loss analysis module 204 is specifically used for:

[0112] The deviation thresholds include a first deviation threshold and a second deviation threshold;

[0113] If the statistical deviation index is greater than the first deviation threshold, the management of line loss measures is deemed unqualified, and the management of line loss plan is adjusted and updated.

[0114] If the technical deviation index is greater than the second deviation threshold, the technical line loss measures are deemed unqualified, and the technical line loss plan is adjusted and updated.

[0115] If the statistical deviation index is less than the first deviation threshold and the technical deviation index is less than the second deviation threshold, and the preset statistical line loss rate is unqualified, then the technical line loss scheme will be updated according to the method of adjusting transformer parameters and layout.

[0116] This application also provides a low-voltage distribution area line loss rate analysis device, which includes a processor and a memory;

[0117] The memory is used to store program code and transfer the program code to the processor;

[0118] The processor is used to execute the low-voltage distribution area line loss rate analysis method in the above method embodiment according to the instructions in the program code.

[0119] This application also provides a computer-readable storage medium for storing program code for executing the low-voltage distribution area line loss rate analysis method in the above method embodiments.

[0120] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0121] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0122] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0123] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for executing all or part of the steps of the methods described in the various embodiments of this application through a computer device (which may be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0124] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for analyzing line loss rate in low-voltage distribution areas, characterized in that, include: The specific process for obtaining the ideal line loss rate of a transformer under ideal three-phase balanced operating conditions is as follows: Based on a preset ideal line loss formula, the ideal line loss rate is calculated using the three-phase current and the equivalent line resistance under ideal three-phase balanced operation of the transformer. The preset ideal line loss formula is expressed as follows: in, , , The three-phase current, The equivalent resistance of the line is given. This represents the equal current in the three phases when they are in equilibrium. The theoretical line loss rate is calculated based on the preset phase-by-phase equal resistance method and the preset transformer area line loss data. Statistical deviation index and technical deviation index are calculated based on the ideal line loss rate, the theoretical line loss rate and the preset statistical line loss rate, respectively. Based on the statistical deviation index, the technical deviation index, and the deviation threshold, an analysis of management line loss measures and technical line loss measures is conducted to obtain the analysis results. The specific process is as follows: The deviation thresholds include a first deviation threshold and a second deviation threshold; If the statistical deviation index is greater than the first deviation threshold, the management line loss measures are deemed unqualified, and the management line loss plan is adjusted and updated. If the technical deviation index is greater than the second deviation threshold, the technical line loss measures are deemed unqualified, and the technical line loss plan is adjusted and updated. If the statistical deviation index is less than the first deviation threshold, and the technical deviation index is less than the second deviation threshold, and the preset statistical line loss rate is unqualified, then the technical line loss scheme is updated according to the method of adjusting transformer parameters and layout.

2. The method for analyzing line loss rate in low-voltage distribution areas according to claim 1, characterized in that, The method of calculating the theoretical line loss rate based on preset transformer area line loss data using the preset phase-by-phase equal resistance method also includes: Obtain statistical line loss data and transformer operation data for the transformer area; The statistical line loss data and the transformer area operation data are subjected to data quality verification, and invalid data is removed to obtain the preset transformer area line loss related data.

3. A low-voltage distribution area line loss rate analysis device, characterized in that, include: The data acquisition module is used to acquire the ideal line loss rate of the transformer under ideal three-phase balanced operating conditions. Specifically, the data acquisition module is used for: Based on a preset ideal line loss formula, the ideal line loss rate is calculated using the three-phase current and the equivalent line resistance under ideal three-phase balanced operation of the transformer. The preset ideal line loss formula is expressed as follows: in, , , The three-phase current, The equivalent resistance of the line is given. This represents the equal current in the three phases when they are in equilibrium. The line loss calculation module is used to calculate the theoretical line loss rate based on the preset phase equal resistance method and the preset transformer area line loss data. The deviation calculation module is used to calculate the statistical deviation index and the technical deviation index based on the ideal line loss rate, the theoretical line loss rate and the preset statistical line loss rate, respectively. The line loss analysis module is used to analyze management line loss measures and technical line loss measures based on the statistical deviation index, the technical deviation index, and the deviation threshold, and to obtain analysis results. Specifically, the line loss analysis module is used for: The deviation thresholds include a first deviation threshold and a second deviation threshold; If the statistical deviation index is greater than the first deviation threshold, the management line loss measures are deemed unqualified, and the management line loss plan is adjusted and updated. If the technical deviation index is greater than the second deviation threshold, the technical line loss measures are deemed unqualified, and the technical line loss plan is adjusted and updated. If the statistical deviation index is less than the first deviation threshold, and the technical deviation index is less than the second deviation threshold, and the preset statistical line loss rate is unqualified, then the technical line loss scheme is updated according to the method of adjusting transformer parameters and layout.

4. The low-voltage distribution area line loss rate analysis device according to claim 3, characterized in that, Also includes: The data preparation module is used to obtain statistical line loss data and operational data of the transformer substations. The data verification module is used to verify the data quality of the statistical line loss data and the transformer area operation data, and to remove invalid data to obtain the preset transformer area line loss related data.

5. A low-voltage distribution area line loss rate analysis device, characterized in that, The device includes a processor and a memory; The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the low-voltage distribution area line loss rate analysis method according to any one of claims 1-2 according to the instructions in the program code.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store program code for executing the low-voltage distribution area line loss rate analysis method according to any one of claims 1-2.

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