Transformer area line loss evaluation method, device and electronic equipment

Abstract

The application discloses a kind of transformer area line loss evaluation method, device and electronic equipment, the method comprises: selecting target evaluation strategy;When executing device end evaluation strategy, the metering data of metering device in statistical period is obtained, the user theoretical electric quantity in statistical period is calculated based on first calculation strategy and metering data, according to user theoretical electric quantity and metering data, transformer area theoretical loss electric quantity is calculated;When executing main station end evaluation strategy, acquisition data read by main station from metering device is obtained, according to the data type of acquisition data, second calculation strategy is matched, the user theoretical electric quantity in statistical period is calculated based on second calculation strategy and acquisition data, according to user theoretical electric quantity and acquisition data, transformer area theoretical loss electric quantity is calculated;First calculation strategy and second calculation strategy are established based on the theoretical scene that transformer area power supply voltage is losslessly conducted to user end.This application can realize the real-time evaluation of transformer area statistical line loss, improve line loss evaluation result reliability and practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer area management, and in particular to a transformer area line loss evaluation method and device and electronic equipment. BACKGROUND

[0002] A transformer area refers to the power supply range or area of a transformer. In the power supply and distribution field, a transformer area management mode is usually implemented. Among them, transformer area power supply, transformer area electricity sales and transformer area low-voltage line loss rate are important evaluation indexes of transformer area management.

[0003] At present, the evaluation index of transformer area line loss is usually formulated according to historical statistical line loss, which has the following problems: the existing evaluation index cannot evaluate the transformer area line loss in real time, the evaluation result has poor practicability and accuracy, cannot reflect the real technical line loss level of the transformer area, cannot determine whether the transformer area statistical line loss is abnormal and the abnormal degree, cannot provide a basis for transformer area loss reduction work, and is not conducive to transformer area management. SUMMARY

[0004] The present application provides a transformer area line loss evaluation method, device and electronic equipment to solve the problem of poor practicability and accuracy of the evaluation result caused by the historical statistical line loss of the existing transformer area line loss evaluation method, and can improve the reliability of line loss evaluation.

[0005] According to an aspect of the present application, a transformer area line loss evaluation method is provided, the transformer area is configured with a metering device, the metering device is used to collect metering data of a transformer area to be measured, and the metering data is sent to a master station, the method comprising: selecting a target evaluation strategy, the target evaluation strategy comprising a device end evaluation strategy and a master station end evaluation strategy; while executing the device end evaluation strategy, obtaining the metering data of the metering device in a statistical period, calculating the user theoretical power in the statistical period based on a first calculation strategy and the metering data, and calculating the transformer area theoretical loss power according to the user theoretical power and the metering data; while executing the master station end evaluation strategy, obtaining the collection data read by the master station from the metering device, matching a second calculation strategy according to the data type of the collection data, calculating the user theoretical power in the statistical period based on the second calculation strategy and the collection data, and calculating the transformer area theoretical loss power according to the user theoretical power and the collection data; wherein the first calculation strategy and the second calculation strategy are established based on the theoretical scenario of lossless conduction of transformer area power supply voltage to the user end.

[0006] According to another aspect of the present application, there is provided a device for evaluating feeder line loss, the feeder being configured with a metering device for collecting metering data of a feeder to be evaluated and sending the metering data to a master station, characterized in that the device is configured to execute the feeder line loss evaluation method, and comprises: a strategy selection module configured to select a target evaluation strategy, the target evaluation strategy comprising a device-end evaluation strategy and a master station-end evaluation strategy; a metering device evaluation module configured to execute the device-end evaluation strategy at the metering device end, and specifically configured to: acquire the metering data of the metering device in a statistical period, calculate user theoretical power in the statistical period based on a first calculation strategy and the metering data, and calculate feeder theoretical loss power according to the user theoretical power and the metering data; and a master station evaluation module configured to execute the master station-end evaluation strategy at the master station end, and specifically configured to: acquire collection data read by the master station from the metering device, match a second calculation strategy according to a data type of the collection data, calculate user theoretical power in the statistical period based on the second calculation strategy and the collection data, and calculate feeder theoretical loss power according to the user theoretical power and the collection data; wherein the first calculation strategy and the second calculation strategy are established based on a theoretical scenario of lossless conduction of feeder power supply voltage to a user end.

[0007] According to another aspect of the present application, there is provided an electronic device, comprising: at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the feeder line loss evaluation method.

[0008] The technical scheme of the embodiment of the application provides a reference benchmark for the line loss evaluation of a transformer area through the device end evaluation strategy or the main station end evaluation strategy. When the device end evaluation strategy is executed, the metering data of a metering device in a statistical period is acquired, the user theoretical power of the transformer area in the statistical period is calculated based on the first calculation strategy and the metering data, and the transformer area theoretical loss power is calculated according to the user theoretical power and the metering data. When the main station end evaluation strategy is executed, the acquisition data read by the main station from the metering device is acquired, the second calculation strategy is matched according to the data type of the acquisition data, the user theoretical power of the transformer area in the statistical period is calculated based on the second calculation strategy and the acquisition data, and the transformer area theoretical loss power is calculated according to the user theoretical power and the acquisition data. The problems that the existing transformer area line loss evaluation method is formulated based on historical statistical line loss, resulting in poor practicability and accuracy of the evaluation result are solved, the line loss statistical result can be evaluated in real time, whether the transformer area statistical line loss is abnormal and the abnormal degree are evaluated, the transformer area line loss management work can be carried out for the transformer area with line loss abnormality, the reliability and practicability of the line loss evaluation result are improved, and the transformer area management level is improved.

[0009] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0011] Figure 1 A flowchart of a transformer area line loss evaluation method provided for the first embodiment of the application;

[0012] Figure 2 A flowchart of a transformer area line loss evaluation method based on a device end evaluation strategy provided for the first embodiment of the application;

[0013] Figure 3 A flowchart of a transformer area line loss evaluation method based on a main station end evaluation strategy provided for the first embodiment of the application;

[0014] Figure 4 A flowchart of another transformer area line loss evaluation method based on a main station end evaluation strategy provided for the first embodiment of the application;

[0015] Figure 5A flow chart of the transformer area line loss evaluation method based on the main station end evaluation strategy provided in the embodiment one of the present application is shown in the figure.

[0016] Figure 6 A structural schematic diagram of the transformer area line loss evaluation device provided in the embodiment two of the present application is shown in the figure.

[0017] Figure 7 A structural schematic diagram of the electronic device for implementing the transformer area line loss evaluation method is shown in the figure. DETAILED DESCRIPTION

[0018] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0020] Embodiment one

[0021] Figure 1 A flow chart of the transformer area line loss evaluation method provided in the embodiment one of the present application is shown in the figure. The present embodiment can be applied to the application theoretical scenario of collecting transformer area data by using traditional metering equipment or smart metering equipment. The method can be executed by a transformer area line loss evaluation device, which can be realized in the form of hardware and / or software, and can be configured in metering equipment, a main station or an independent electronic device. In the present embodiment, the transformer area is configured with metering equipment, which is used to collect metering data of the transformer area to be measured and send the metering data to the main station. In the present embodiment, the metering equipment includes transformer area metering equipment (such as a transformer area total meter) and user end metering equipment (such as a user electric energy meter). As shown in the figure, the transformer area line loss evaluation method of the present application includes the following steps: Figure 1 ​

[0022] S1: selecting a target evaluation strategy, the target evaluation strategy including a device-side evaluation strategy and a master station-side evaluation strategy.

[0023] The device-side evaluation strategy refers to a strategy capable of realizing line loss evaluation at the metering device side; the master station-side evaluation strategy refers to a strategy of receiving acquisition data from the metering device side at the master station side and realizing line loss evaluation by the master station side. In this embodiment, the accuracy of the device-side evaluation strategy is superior to that of the master station-side evaluation strategy due to the influence of factors such as the granularity of data acquisition by the master station.

[0024] In this embodiment, the target evaluation strategy can be selected according to the performance and configuration of the metering device. For example, the target evaluation strategy is selected according to whether the metering device supports the evaluation function. When the metering device supports the evaluation function extension, the device-side evaluation strategy is preferentially selected; when the metering device only supports the data acquisition and transmission function, the master station-side evaluation strategy is selected.

[0025] S2: obtaining metering data of the metering device in a statistical period when the device-side evaluation strategy is executed, calculating user theoretical electric quantity in the statistical period based on a first calculation strategy and the metering data, and calculating substation theoretical loss electric quantity according to the user theoretical electric quantity and the metering data.

[0026] The metering data includes but is not limited to at least one of the following: total meter measured data (such as substation power supply electric quantity, substation power supply circuit and substation three-phase voltage) and user phase information and user measured data (such as user power consumption, user power generation and user voltage) of all users under the to-be-tested substation. Alternatively, the metering data includes total meter measured electric quantity, substation power supply voltage, user phase information, user measured electric quantity and user voltage. The user phase information indicates the phase to which the user belongs. The total meter measured electric quantity can be calculated according to the meter code data of the substation total meter; the substation power supply voltage can be calculated according to the voltage data of the substation total meter; the user phase information can be obtained through voltage zero-crossing detection; the user measured electric quantity can be calculated according to the meter code data of the user electric energy meter; and the user voltage can be calculated according to the voltage data of the user electric energy meter.

[0027] In this embodiment, the first calculation strategy is based on the theoretical scenario that the substation power supply voltage is conducted to the user side without loss, and the corresponding relationship between the user measured electric quantity and the user theoretical electric quantity is established. That is, in this application, the user theoretical electric quantity represents the active electric quantity calculated when the substation power supply voltage is conducted to the user side without loss in the statistical period without considering the substation technical line loss. The substation theoretical loss electric quantity represents the difference between the user theoretical electric quantity and the user measured electric quantity in the statistical period.

[0028] Specifically, the first calculation strategy is executed by the metering device side. The calculation formula of the first calculation strategy is W 有功电量=∑(U×I×cosΦ×Δt), where U represents a voltage effective value, I represents a current effective value, cosΦ represents a power factor, and Δt represents a unit time. In an actual power supply process, there is a technical line loss in a transformer area, and there is a voltage drop between the transformer area and a user. A user measured electric quantity ΔW 用户实测电量 =U 用户 ×I 用户 ×cosΦ×Δt. It is assumed that there is no technical line loss in the transformer area, and the transformer area power supply voltage is transmitted to the user side without loss. At this time, a user theoretical electric quantity ΔW 用户理论电量 =U 台区 ×I 用户 ×cosΦ×Δt. The corresponding relationship between the user measured electric quantity ΔW 用户实测电量 and the user theoretical electric quantity ΔW 用理论电量 satisfies: ΔW 用户理论电量 / ΔW 用户实测电量 =U 台区 / U 用户 . Thus, the user measured electric quantity is introduced into the first calculation strategy, and the user theoretical electric quantity is calculated. Further, based on the deviation between the user theoretical electric quantity and the user measured electric quantity in a statistical period, a transformer area theoretical loss electric quantity is calculated. The transformer area theoretical loss electric quantity can be used as a transformer area line loss evaluation benchmark.

[0029] S3: When the main station end evaluation strategy is executed, acquisition data read by a main station metering device is obtained, a second calculation strategy is matched according to a data type of the acquisition data, a user theoretical electric quantity in a statistical period is calculated based on the second calculation strategy and the acquisition data, and a transformer area theoretical loss electric quantity is calculated according to the user theoretical electric quantity and the acquisition data.

[0030] The acquisition data includes but is not limited to at least one of the following: total meter measured data (such as transformer area power input, transformer area power output, and transformer area three-phase voltage) and user phase information and user measured data (such as user power consumption, user power generation, and user voltage) of all users under the transformer area to be measured.

[0031] In the embodiment, the second calculation strategy is based on the corresponding relationship between the user measured electric quantity and the user theoretical electric quantity, or the corresponding relationship between user measured power data (such as active power or apparent power) and user theoretical power data (such as active power or apparent power) under the theoretical scenario that the transformer area power supply voltage is transmitted to the user end without loss. That is, in the present application, the user theoretical electric quantity represents a theoretical active electric quantity in a statistical period, without considering the transformer area technical line loss, and the transformer area power supply voltage is transmitted to the user end without loss. The transformer area theoretical loss electric quantity represents a difference between the user theoretical electric quantity and the user measured electric quantity in the statistical period.

[0032] Specifically, the second calculation strategy is executed at the master station end. The data types collected by low-voltage users in different transformer area configurations are different. Usually, voltage, current and daily frozen table code are collected as necessary data items, while whether to collect minute-level table code in the load curve, power factor and phase identification and other data in different transformer areas is different. The second calculation strategy is matched according to the data type of the collected data read by the self-measuring device at the master station end. If the second calculation strategy is based on the theoretical scenario that the transformer area power supply voltage is losslessly conducted to the user end, the corresponding relationship between the user measured power and the user theoretical power is established, the user measured power is introduced into the corresponding second calculation strategy, and the user theoretical power is calculated. Further, the transformer area theoretical loss power is calculated based on the deviation between the user theoretical power and the user measured power in the statistical period. The transformer area theoretical loss power can be used as a transformer area line loss evaluation benchmark.

[0033] If the second calculation strategy is based on the theoretical scenario that the transformer area power supply voltage is losslessly conducted to the user end, the corresponding relationship between the user measured power (such as active power or apparent power) and the user theoretical power (such as active power or apparent power) is established, the user measured active power is introduced into the corresponding second calculation strategy, and the user theoretical power is calculated. Further, the transformer area theoretical loss power is calculated based on the deviation between the user theoretical power and the user measured power in the statistical period. The transformer area theoretical loss power can be used as a transformer area line loss evaluation benchmark.

[0034] Therefore, by setting the device end evaluation strategy or the master station end evaluation strategy, a reference benchmark is provided for transformer area statistical line loss evaluation, the problem of poor practicality and accuracy of the evaluation result caused by the historical statistical line loss of the existing transformer area line loss evaluation method is solved, the line loss statistical result can be evaluated in real time, whether the transformer area statistical line loss is abnormal and the abnormality degree are evaluated, the transformer area line loss management work can be carried out for the transformer area line loss abnormal transformer area, the reliability and practicality of the line loss evaluation result are improved, and the transformer area management level is improved.

[0035] Figure 2 A flowchart of a transformer area line loss evaluation method based on a device end evaluation strategy provided by the embodiment one of the present application is shown in Figure 2 As shown in the above step S2, the user theoretical power in the statistical period is calculated based on the first calculation strategy and the metering data, which includes:

[0036] S201: The transformer area power supply voltage, the user voltage and the user measured power are respectively segmented and counted to form a transformer area three-phase voltage sequence, a user voltage sequence of each user and a user measured power sequence of each user.

[0037] Wherein, the segmented counting means that the statistical period is divided into n Δt periods The data is counted according to the time sequence with Δt as the unit time. Wherein, n is a positive integer greater than or equal to 2.

[0038] Exemplarily, taking a statistical period of 20 hours as an example, Δt can be set to be 1 minute, and n represents 1440, that is, the statistical period is divided into 1440 1-minute time periods. The three-phase voltage sequence of the transformer area and the three-phase user voltage sequence can be represented as {(U A , U B , U C ) t1 , (U A , U B , U C ) t2 , …, (U A , U B , U C ) tn}; the user voltage sequence of the single-phase user can be represented as {U t1 , U t2 , …, U tn}; and the user measured power sequence of the single-phase user can be represented as {ΔW t1用户实测电量 , ΔW t2用户实测电量 , …, ΔW tn用户实测电量}. In the embodiment, if the starting time of the ith Δt time period is defined as t i0 , and the ending time is defined as t i1 , the user voltage The user measured power ΔW ti用户实测电量 = (Wt i1表码 - Wt i0表码 )*β, wherein Wt i1表码 represents the metering data at t i1 ; Wt i0表码 represents the metering data at t i0 ; and β represents the conversion ratio between the metering data and the electric energy, and the value of β is related to the use scenario of the electric energy meter (for example, whether a current transformer or a voltage transformer is installed).

[0039] S202: Obtain the user phase information of each user, and obtain the transformer voltage sequence of the corresponding phase from the transformer area three-phase voltage sequence according to the user phase information of any user.

[0040] In the embodiment, the user phase information includes any one of the following: an A-phase user, a B-phase user, a C-phase user, or a three-phase user. Specifically, the user phase information (for example, an A-phase user, a B-phase user, or a C-phase user) of the user can be recognized by zero-crossing detection on the user voltage.

[0041] S203: Calculate the single-period theoretical power of the same time period in the transformer voltage sequence, the user voltage sequence, and the user measured power sequence according to the data of the same time period.

[0042] S204: The theoretical electricity consumption of each time period within the statistical period is summed to obtain the user's theoretical electricity consumption.

[0043] For example, taking a user as phase A as an example, the voltage sequence of the transformer area corresponding to phase A can be represented as follows: The user voltage sequence can be represented as {U t1 U t2 , ..., U tn The user's measured power consumption sequence can be represented as {ΔW}. t1用户实测电量 ΔW t2用户实测电量 , …, ΔW tn用户实测电量};The theoretical electricity consumption ΔW in the i-th Δt time period ti理论 Calculate using the following formula: Among them, U Ati U represents the voltage of phase A in the i-th time interval Δt; ti This represents the user voltage during the i-th time interval Δt. The theoretical user electricity consumption within the statistical period.

[0044] It should be noted that when the phase recognition of the electricity meter fails, the voltage at each moment in the voltage sequence of the distribution area is taken as the average value of the three-phase voltage of the distribution area.

[0045] It should also be noted that if the user is a three-phase user and the individual phase electricity data is available, the theoretical electricity of each phase (A, B, and C) is calculated by summing the theoretical electricity of each phase separately, and then the sum of the theoretical electricity of each phase is taken as the user's theoretical electricity. If the individual phase electricity of a three-phase user is not available, and only the combined electricity of the three phases is available, then the average value of the three-phase voltage and other metering data is taken and the user's theoretical electricity is calculated according to the calculation method.

[0046] See Figure 2 As shown, in step S2 above, the theoretical power loss of the transformer area is calculated based on the user's theoretical power consumption and metering data, including:

[0047] S205: Calculate the actual electricity consumption of each user within the statistical period.

[0048] Specifically, the actual measured electricity consumption of users within the statistical period T can be calculated using the following formula: W 用户实测电量 =(W T1表码 -W T0表码 )*β, where W T1表码 W represents the table code data at the end of the statistical period T; T0表码 β represents the meter reading at the start of the statistical period T; β represents the conversion ratio between the meter reading and electrical energy. The value of β is related to the usage scenario of the electricity meter (e.g., whether a current transformer or voltage transformer is installed).

[0049] S206: Calculate the user's theoretical power loss based on the user's theoretical power consumption and the user's actual power consumption.

[0050] The theoretical power loss of a user is calculated based on the difference between the user's theoretical power loss and the user's actual power loss.

[0051] S207: Sum the theoretical power loss of all users in the test area to obtain the theoretical power loss of the test area.

[0052] Specifically, the theoretical electricity consumption of a single user within the statistical period is defined as W. 用户理论电量 The user's actual measured power consumption is W. 用户实测电量 The theoretical power loss W for a single user 用户理论损失电量 =W 用户理论电量 -W 用户实测电量 The theoretical power loss W for all users 用户理论损失电量 Summation is performed to calculate the theoretical power loss W of the transformer area. 台区理论损失电量 =∑W 用户理论损失电量 .

[0053] See Figure 2 As shown, after calculating the theoretical power loss of the transformer area based on the user's theoretical power consumption and the collected data, the transformer area line loss evaluation method of this application also includes:

[0054] S208: Obtain the statistical line loss of the transformer area within the statistical period.

[0055] In some embodiments, obtaining the statistical line loss of a transformer substation within a statistical period includes: obtaining the power supplied to the substation and the total power consumption of users in the substation under test within the statistical period; and calculating the statistical line loss of the substation based on the power supplied to the substation and the total power consumption of users. Specifically, the statistical line loss of the substation is calculated by subtracting the total measured power consumption of all users from the total measured power consumption of the substation's main meter.

[0056] S209: When the deviation between the statistical line loss of the transformer area and the theoretical line loss of the transformer area exceeds the preset threshold, the statistical line loss of the transformer area is determined to be abnormal.

[0057] The preset threshold is based on the detection accuracy of the main meter in the distribution area and the user's electricity meter, as well as the electricity consumption loss of the electricity meter. The preset threshold can be set as the upper limit threshold for net electricity deviation, or the upper limit threshold for electricity deviation rate.

[0058] Specifically, the above steps S201 to S204 describe a specific implementation of calculating the user theoretical power based on the first calculation strategy. After the end of the statistical period T, the total meter of the transformer area sends the transformer area three-phase voltage sequence and the phase identification result to all user energy meters of the transformer area. The low-voltage user energy meter determines the phase to which the current user belongs (for example, A phase, B phase or C phase) according to the user corresponding user phase information, and takes the transformer area voltage sequence of the corresponding phase from the transformer area three-phase voltage sequence (if the energy meter phase identification fails, the transformer area voltage sequence is formed by taking the average value of the transformer area three-phase voltage). In combination with the user theoretical power W The single-period theoretical power of each Δt period is calculated in turn, and the single-period theoretical power of each Δt period is accumulated to obtain the user theoretical power W 用户理论电量 of each user in the statistical period T.

[0059] The above steps S205 to S207 describe a specific implementation of calculating the transformer area theoretical loss power. The user measured power W 用户实测电量 of all users in the statistical period T is obtained, and the user theoretical power W 用户理论电量 of the same user is subtracted from the user measured power W 用户实测电量 to obtain the user theoretical loss power W 用户理论损失电量 of the user in the statistical period T.

[0060] The above steps S208 to S209 describe a specific implementation of line loss evaluation based on the transformer area theoretical loss power. The total meter of the transformer area collects the user theoretical loss power W 用户理论损失电量 and the user measured power W 用户实测电量 of all users in the transformer area. In some embodiments, the total meter of the transformer area sums all user theoretical loss powers W 用户理论损失电量 to calculate the transformer area theoretical loss power W 台区理论损失电量 . In other embodiments, the total meter of the transformer area sends the total meter measured power of the total meter of the transformer area, the user measured power W 用户实测电量 and the user theoretical loss power W 用户理论损失电量 of all users to the master station, the master station calculates the transformer area statistical line loss power W 台区统计线损电量 by subtracting all user measured powers from the total meter measured power of the total meter of the transformer area; the master station accumulates and sums all user theoretical loss powers W 用户理论损失电量 to calculate the transformer area theoretical loss power W 台区理论损失电量 . When the deviation data between the transformer area statistical line loss power W 台区统计线损电量 and the transformer area theoretical loss power W 台区理论损失电量 exceeds the preset threshold, it is determined that the transformer area statistical line loss is abnormal. If the deviation data between the transformer area statistical line loss power W 台区统计线损电量 and the transformer area theoretical loss power W 台区理论损失电量 does not exceed the preset threshold, it is determined that the transformer area statistical line loss is normal.

[0061] Figure 3 A flow chart of a transformer area line loss evaluation method based on a main station end evaluation strategy is provided for the first embodiment of the present application. Referring to FIG. 4, when the collected data is voltage data and meter code data, a second calculation strategy is based on a theoretical scenario in which transformer area power supply voltage is losslessly conducted to a user end, and a corresponding relationship between user measured power and user theoretical power is established. In this embodiment, the calculation formula of the second calculation strategy includes the following formula one: Figure 3

[0062] ΔW 用户理论电量 = ΔW 用户实测电量 × U 台区 / U 用户 (Formula One)

[0063] Wherein, ΔW 用户理论电量 represents the single-period theoretical power of a single user in a unit time (such as a Δt period); ΔW 用户实测电量 represents the measured power of a single user in a unit time; U 台区 represents the transformer area voltage in a unit time; and U 用户 represents the user voltage of a single user in a unit time.

[0064] In combination with the above formula one, referring to FIG. 4, when the collected data is voltage data and meter code data, in the above step S3, the user theoretical power in the statistical period is calculated based on the second calculation strategy and the collected data, including the following steps: Figure 3

[0065] S301: Segmenting the meter code data to form a user measured power sequence of each user, and segmenting the voltage data to form a transformer area three-phase voltage sequence and a user voltage sequence of each user.

[0066] In this embodiment, the segmenting method and the user measured power sequence, the transformer area three-phase voltage sequence, and the user voltage sequence are the same as those shown in the embodiment of FIG. 3, and will not be described again. Figure 2

[0067] S302: Obtaining the user phase information of each user, and taking the transformer area voltage sequence of the corresponding phase from the transformer area three-phase voltage sequence according to the user phase information of any user.

[0068] S303: Calculating the single-period theoretical power of the same period according to the transformer area voltage sequence, the user voltage sequence, and the user measured power sequence.

[0069] S304: Accumulating and summing the single-period theoretical power of all periods in the statistical period to obtain the user theoretical power.

[0070] ​​​Specifically, steps S301 to S304 above describe a second calculation strategy for establishing the correspondence between the user's measured electricity consumption and the user's theoretical electricity consumption under the theoretical scenario of lossless transmission of power supply voltage from the distribution area to the user end, in order to calculate the user's theoretical electricity consumption. After the statistical period T ends, the main station collects voltage data and meter reading data from the distribution area's main meter and the user's electricity meter. Based on the collected meter reading data and voltage data, the user's measured electricity consumption and user voltage are calculated for each Δt time period, resulting in the user's measured electricity consumption sequence {ΔW}. t1用户实测电量 ΔW t2用户实测电量 , …, ΔW tn用户实测电量}, and user voltage sequence {U t1 U t2 , ..., U tn Let t be the starting time of the i-th Δt time interval. i0 The termination time is t i1 Then the user voltage User-measured battery capacity ΔW ti用户实测电量 =(Wt) i1表码 -Wt i0表码 )*β, where Wt i1表码 Indicates t i1 Time-based table code data; Wt i0表码 Indicates t i0 The meter readings at that moment; β represents the conversion factor between the meter readings and electrical energy. Furthermore, based on the user's corresponding phase information, the current user's phase (e.g., phase A) is determined, from the three-phase voltage sequence of the transformer area {(U... A U B U C ) t1 , (U A U B U C ) t2 , ..., (U A U B U C ) tn The corresponding phase voltage sequence of the transformer substation is taken from the formula above (if the phase recognition of the energy meter fails, the average value of the three-phase voltage of the substation is taken to form the substation voltage sequence). Combining this with Formula 1 above, the theoretical electricity consumption per time period (Δt) is calculated sequentially, and the theoretical electricity consumption per time period (Δt) is accumulated to obtain the theoretical electricity consumption W of each user within the statistical period T. 用户理论电量 .

[0071] See Figure 3 As shown, in step S3 above, the theoretical power loss of the transformer area is calculated based on the user's theoretical power consumption and metering data, including:

[0072] S305: Calculate the actual electricity consumption of each user within the statistical period.

[0073] Specifically, the actual measured electricity consumption of users within the statistical period T can be calculated using the following formula: W 用户实测电量 =(W T1表码 -W T0表码 )*β, where W T1表码 W represents the table code data at the end of the statistical period T; T0表码 β represents the meter reading at the start of the statistical period T; β represents the conversion ratio between the meter reading and electrical energy. The value of β is related to the usage scenario of the electricity meter (e.g., whether a current transformer or voltage transformer is installed).

[0074] S306: Calculate the user's theoretical power loss based on the user's theoretical power consumption and the user's actual power consumption.

[0075] The theoretical power loss of a user is calculated based on the difference between the user's theoretical power loss and the user's actual power loss.

[0076] S307: The theoretical power loss of all users in the test area is summed to obtain the theoretical power loss of the test area.

[0077] Specifically, steps S305 to S307 above describe a specific implementation method for calculating the theoretical power loss of a distribution area. The theoretical power consumption of a single user within the statistical period is defined as W. 用户理论电量 The user's actual measured power consumption was W. 用户实测电量 Using the same user's theoretical electricity consumption W 用户理论电量 Subtract the user's actual measured power consumption (W) 用户实测电量 Calculate the user's theoretical power loss W. 用户理论损失电量 =W 用户理论电量 -W 用户实测电量 The theoretical power loss W for all users 用户理论损失电量 Summation is performed to calculate the theoretical power loss W of the transformer area. 台区理论损失电量 =∑W 用户理论损失电量 .

[0078] See Figure 3 As shown, after calculating the theoretical power loss of the transformer area based on the user's theoretical power consumption and the collected data, the transformer area line loss evaluation method of this application also includes:

[0079] S308: Obtain the statistical line loss power of the transformer area within the statistical period.

[0080] In some embodiments, obtaining the statistical line loss of a transformer substation within a statistical period includes: obtaining the power supplied to the substation and the total power consumption of users in the substation under test within the statistical period; and calculating the statistical line loss of the substation based on the power supplied to the substation and the total power consumption of users. Specifically, the statistical line loss of the substation is calculated by subtracting the total measured power consumption of all users from the total measured power consumption of the substation's main meter.

[0081] S309: When the deviation data between the statistical line loss power of the transformer area and the theoretical loss power of the transformer area exceeds the preset threshold, it is determined that the statistical line loss of the transformer area is abnormal.

[0082] The preset threshold is set based on the detection accuracy of the total metering data of the transformer area and the electric energy meter of the user and the power consumption of the electric energy meter. The preset threshold can be set as an upper threshold of the net power deviation value, or an upper threshold of the power deviation rate.

[0083] Specifically, the steps S308 to S309 describe a specific implementation of line loss evaluation based on the theoretical loss power of the transformer area. The main station collects the total metering data of the transformer area and the user electric energy meter code data, calculates the total power supply of the transformer area according to the total metering data, calculates the total power consumption of the user according to the user meter code data of all users, and calculates the statistical line loss power W 台区统计线损电量 of the transformer area according to the difference between the total power supply of the transformer area and the total power consumption of the user. 用户理论损失电量 The main station also accumulates and sums the user theoretical loss power W 台区理论损失电量 of all users to calculate the theoretical loss power W 台区统计线损电量 of the transformer area. 台区理论损失电量 When the deviation data between the statistical line loss power W 台区统计线损电量 of the transformer area and the theoretical loss power W 台区理论损失电量 of the transformer area exceeds the preset threshold, it is determined that the statistical line loss of the transformer area is abnormal. If the deviation data between the statistical line loss power W 台区统计线损电量 of the transformer area and the theoretical loss power W 台区理论损失电量 of the transformer area does not exceed the preset threshold, it is determined that the statistical line loss of the transformer area is normal.

[0084] Optionally, the collected data also includes power correlation data and daily frozen meter code data. The power correlation data represents data used to obtain active power or apparent power. Typically, the power correlation data includes but is not limited to: minute-level voltage data, current data, power factor data, and active power data.

[0085] Figure 4 Another transformer area line loss evaluation method based on the main station evaluation strategy provided by the first embodiment of the present application is provided. When the collected data is power correlation data and daily frozen meter code data, and does not include minute-level meter code data, the second calculation strategy is based on the theoretical scenario that the transformer area power supply voltage is losslessly conducted to the user end, and the corresponding relationship between the user measured power data (such as active power or apparent power) and the user theoretical power data (such as active power or apparent power) is established. In this embodiment, the calculation formula of the second calculation strategy includes but is not limited to the following formula two or formula three:

[0086]

[0087] wherein W 用户理论电量 represents the theoretical power of a single user in a statistical period; W用户实测电量 represents the measured power of a single user in a statistical period; P 用户理论功率数据 may be the sum of the user theoretical active power of a single user in a statistical period under the condition of no loss of the transformer area 用户理论有功功率 or the user theoretical average active power P 用户理论平均有功功率 ; P 用户实测功率数据 may be the sum of the user measured active power of a single user in a statistical period 用户实测有功功率 or the user measured average active power P 用户实测平均有功功率 ; S 用户理论功率数据 may be the sum of the theoretical reactive power of a single user in a statistical period under the condition of no loss of the transformer area 用户理论视在功率 or the theoretical average reactive power S 用户理论平均视在功率 ; S 用户实测功率数据 is the sum of the measured reactive power of a single user in a statistical period 用户实测视在功率 or the theoretical average reactive power S 用户实测平均视在功率 .

[0088] In combination with the above formula two or formula three, referring to FIG. 4, when the collected data is minute-level voltage data, current data, power factor data and daily frozen meter code data, and does not include minute-level meter code data, the user theoretical power in a statistical period is calculated based on the second calculation strategy and the collected data in the above step S3, including: Figure 4 S401: calculating the user measured power of each user in a statistical period according to the daily frozen meter code data.

[0089] Specifically, the user measured power in a statistical period T can be calculated by the following formula: W 用户实测电量 = (W T1表码 -W T0表码 )*β, wherein W T1表码 represents the meter code data at the end of the statistical period T; W T0表码 represents the meter code data at the beginning of the statistical period T; and β represents the conversion ratio between the meter code data and the electric energy, which is related to the use scenario of the electric energy meter (for example, whether a current transformer or a voltage transformer is installed).

[0090] S402: calculating the user measured power data and the user theoretical power data of the lossless transmission of the transformer area power supply voltage to the user end in a statistical period according to the power correlation data.

[0091] Specifically, the user measured active power and the user theoretical active power can be calculated according to the power correlation data, or the user measured average active power and the user theoretical average active power can be calculated according to the power correlation data, or the user measured reactive power and the user theoretical reactive power can be calculated according to the power correlation data.

[0092]

[0093] ​In some embodiments, the user theoretical active power is calculated based on the substation voltage, the user current and the power factor; the user actual active power is calculated based on the user voltage, the user current and the power factor; the user theoretical apparent power is calculated based on the substation voltage and the user current; and the user actual apparent power is calculated based on the user voltage and the user current.

[0094] Specifically, wherein P 用户理论有功功率 represents the sum of the theoretical active power of the single user in the statistical period under the condition of no loss of the substation; U 台区 represents the substation voltage per unit time; I 用户 represents the user current per unit time of the single user; and represents the power factor per unit time of the single user; and n represents the total number of unit time in the statistical period.

[0095] wherein P 用户理论平均有功功率 represents the average value of the theoretical active power of the single user in each period in the statistical period under the condition of no loss of the substation.

[0096] wherein P 用户实测有功功率 represents the sum of the actual active power of the single user in the statistical period; U 用户 represents the user voltage per unit time of the single user; I 用户 represents the user current per unit time of the single user; and represents the power factor per unit time of the single user; and n represents the total number of unit time in the statistical period.

[0097] wherein P 用户实测平均有功功率 represents the average value of the actual active power of the single user in each period in the statistical period.

[0098] wherein S 用户理论视在功率 represents the sum of the theoretical apparent power of the single user in the statistical period under the condition of no loss of the substation.

[0099] wherein S 用户理论平均视在功率 represents the average value of the theoretical apparent power of the single user in each period in the statistical period under the condition of no loss of the substation.

[0100] wherein S 用户实测视在功率 represents the sum of the theoretical apparent power of the single user in the statistical period.

[0101] wherein S 用户实测平均视在功率This represents the average measured apparent power of a single user across different time periods within the statistical period.

[0102] In other embodiments, the user's measured active power is obtained by reading the active power of each time period in the collected data; the user's theoretical active power is calculated based on the transformer area voltage, the user voltage, and the user's measured active power.

[0103] S403: Calculate the user's theoretical power consumption based on the user's actual measured power consumption, user's actual measured power data, and user's theoretical power data.

[0104] In this embodiment, the user's measured electricity consumption, user's measured power data, and user's theoretical power data are substituted into Formula 2 or Formula 3 above to calculate the user's theoretical electricity consumption under the condition of no loss in the transformer area.

[0105] Specifically, taking power-related data, including voltage, current, and power factor data, as an example, the voltage, current, and power factor data are segmented and statistically analyzed to form the three-phase voltage sequence of the transformer area, and the user voltage sequence, user current sequence, and user power factor sequence for each user. In this embodiment, the segmented statistical method is similar to... Figure 2 The embodiments shown are the same. The three-phase voltage sequence of the transformer area and the three-phase user voltage sequence can be represented as {(U A U B U C ) t1 , (U A U B U C ) t2 , ..., (U A U B U C ) tn}; The user voltage sequence for a single-phase user can be represented as {U t1 U t2 , ..., U tn The three-phase user current sequence can be represented as {(I A I B I C ) t1 , (I A ,I,I C ) t2 , ..., (I A I B I C ) tn}; The user current sequence for a single-phase user can be represented as {I t1 I t2 , ..., I tn The single-phase user power factor sequence can be expressed as: The three-phase user power factor sequence can be expressed as follows:

[0106] Further, the single-period measured active power of the same period is calculated according to the data in the user voltage sequence, the user current sequence and the user power factor sequence, and the single-period measured active powers of all periods in the statistical period are accumulated and summed to obtain the user theoretical active power, or the single-period theoretical active powers of all periods in the statistical period are averaged to obtain the user measured average active power.

[0107] In the embodiment, it can be known from the above formula two and formula three that the single-period theoretical active power P i实测有功功率 The following formula is used for calculation: Wherein, U ti represents the user voltage of the ith Δt period, I ti represents the user current of the ith Δt period, represents the user power factor of the ith Δt period. The user measured active power in the statistical period The user measured average active power in the statistical period Further, the user phase information of each user is obtained, and the corresponding phase of the transformer voltage sequence is taken from the transformer three-phase voltage sequence according to the user phase information of any user. The single-period theoretical active power of the user under the condition of no loss of the transformer is calculated according to the data in the transformer voltage sequence, the user current sequence and the user power factor sequence of the same period, and the single-period theoretical active powers of all periods in the statistical period are accumulated and summed to obtain the user theoretical active power, or the single-period theoretical active powers of all periods in the statistical period are averaged to obtain the user theoretical average active power. Exemplarily, taking the A-phase user as an example, the corresponding phase (A-phase) of the transformer voltage sequence taken from the transformer three-phase voltage sequence can be represented as It can be known from the above formula two and formula three that under the condition of no loss of the transformer, the single-period theoretical active power P i理论有功功率 The following formula is used for calculation: Wherein, represents the A-phase transformer voltage of the ith Δt period, I ti represents the user current of the ith Δt period, represents the user power factor of the ith Δt period. The user theoretical active power in the statistical period The user theoretical average active power in the statistical period

[0108] Furthermore, the theoretical energy consumption of a user is calculated based on the user's actual measured energy consumption, actual measured active power, and theoretical active power; alternatively, it is calculated based on the user's actual measured energy consumption, average actual measured active power, and average theoretical active power. The theoretical energy consumption within the statistical period is considered as... or,

[0109] See Figure 4 As shown, in step S3 above, the theoretical power loss of the transformer area is calculated based on the user's theoretical power consumption and metering data, including:

[0110] S404: Calculate the user's theoretical power loss based on the user's theoretical power consumption and the user's actual power consumption.

[0111] The theoretical power loss of a user is calculated based on the difference between the user's theoretical power loss and the user's actual power loss.

[0112] S405: Sum the theoretical power loss of all users in the test area to obtain the theoretical power loss of the area.

[0113] Specifically, steps S404 to S405 above describe a specific implementation method for calculating the theoretical power loss of a distribution area. The theoretical power consumption of a single user within the statistical period is defined as W. 用户理论电量 The user's actual measured power consumption was W. 用户实测电量 The theoretical power loss W for a single user 用户理论损失电量 =W 用户理论电量 -W 用户实测电量 The theoretical power loss W for all users 用户理论损失电量 Summation is performed to calculate the theoretical power loss W of the transformer area. 台区理论损失电量 =∑W 用户理论损失电量 .

[0114] See Figure 4 As shown, after calculating the theoretical power loss of the transformer area based on the user's theoretical power consumption and the collected data, the transformer area line loss evaluation method of this application also includes:

[0115] S406: Obtain the statistical line loss power of the transformer area within the statistical period.

[0116] In some embodiments, obtaining the statistical line loss of a transformer substation within a statistical period includes: obtaining the power supplied to the substation and the total power consumption of users in the substation under test within the statistical period; and calculating the statistical line loss of the substation based on the power supplied to the substation and the total power consumption of users. Specifically, the statistical line loss of the substation is calculated by subtracting the total measured power consumption of all users from the total measured power consumption of the substation's main meter.

[0117] S407: When the deviation between the statistical line loss of the transformer area and the theoretical line loss of the transformer area exceeds the preset threshold, the statistical line loss of the transformer area is determined to be abnormal.

[0118] The preset threshold is based on the detection accuracy of the main meter in the distribution area and the user's electricity meter, as well as the electricity consumption loss of the electricity meter. The preset threshold can be set as the upper limit threshold for net electricity deviation, or the upper limit threshold for electricity deviation rate.

[0119] Figure 5 This is a flowchart of another method for evaluating transformer substation line loss based on a master station evaluation strategy, provided in Embodiment 1 of the present invention. When the collected data is voltage data and daily frozen meter readings, the second calculation strategy establishes the correspondence between the user's measured electricity consumption, the user's theoretical electricity consumption, and the average voltage based on the theoretical scenario of lossless transmission of transformer substation power supply voltage to the user end. In this embodiment, the calculation formula of the second calculation strategy includes the following formula four:

[0120]

[0121] Among them, U 台区平均电压 U represents the average voltage of the transformer substation (three-phase voltage average or single-phase voltage value) within the statistical period. 台区 U represents the voltage of the transformer substation per unit time, where n represents the total number of time periods within the statistical period; 用户平均电压 U represents the average voltage of a single user within a statistical period. 用户 W represents the voltage of a single user per unit time. 用户理论电量 W represents the theoretical electricity consumption of a single user within the statistical period T. 用户实测电量 This represents the measured electricity consumption of a single user within the statistical period T.

[0122] Combined with Formula 4 above, see [link / reference]. Figure 5 As shown, when the collected data consists of voltage data and daily frozen meter readings, step S3 above, which calculates the user's theoretical electricity consumption within the statistical period based on the second calculation strategy and the collected data, includes the following steps:

[0123] S501: Calculate the average voltage of each phase in the distribution area and the average voltage of each user based on the voltage data.

[0124] Specifically, the voltage data is segmented and statistically analyzed to form the three-phase voltage sequence of the transformer area and the three-phase user voltage sequence {(U A U B U C ) t1 , (U A U B U C ) t2 , ..., (U A U B UC ) tn},single-phase user's user voltage sequence {U t1 , U t2 , …, U tn}. In combination with Formula Four above, the user average voltage wherein U ti represents the user voltage of the i-th Δt period.

[0125] S502: Calculate the user measured power of each user in the statistical period according to the daily frozen meter code data.

[0126] Specifically, the user measured power of the statistical period T can be calculated by the following formula: W 用户实测电量 = (W T1表码 - W T0表码 ) * β, wherein W T1表码 represents the daily frozen meter code data at the end of the statistical period T; W T0表码 represents the daily frozen meter code data at the beginning of the statistical period T; and β represents the conversion ratio between the meter code data and the electric energy, and the value of β is related to the use scenario of the electric energy meter (for example, whether a current transformer or a voltage transformer is installed).

[0127] S503: Obtain the user phase information of each user, and take the corresponding phase of the substation average voltage from the substation three-phase average voltage according to the user phase information of any user.

[0128] Exemplarily, taking the user as an A-phase user as an example, the substation voltage sequence of the corresponding phase (A-phase) taken from the substation three-phase voltage sequence can be represented as In combination with Formula Four above, the substation average voltage wherein, represents the A-phase substation voltage of the i-th Δt period.

[0129] S504: Calculate the user theoretical power according to the user measured power, the substation average voltage and the user average voltage.

[0130] Specifically, the steps S501 to S504 describe a specific implementation of establishing a second calculation strategy between the user measured power, the user theoretical power and the average voltage based on the theoretical scenario of the lossless conduction of the substation power supply voltage to the user end, to calculate the user theoretical power. The master station collects the substation total table and user electric energy meter voltage data and daily frozen table code data. According to the above formula four, the average values of the phase voltages of the phases A, B and C of the substation A in the statistical period T and the average values of the three-phase voltages are calculated, and the overall average values of the phase voltages of all users in the statistical period T are calculated. At the same time, based on the daily frozen table code data, the user measured power of each user in the statistical period is calculated. The low-voltage user electric energy meter determines the phase type (for example, A phase, B phase or C phase) to which the current user belongs according to the user corresponding user phase information, takes the substation voltage of the corresponding phase type from the substation three-phase voltage sequence, and calculates the substation average voltage. The user measured power, the substation average voltage and the user average voltage are substituted into the above formula four to calculate the user theoretical power W 用户理论电量 用户实测电量 台区平均电压 用户平均电压

[0131] Referring to FIG. 3, in the step S3, the substation theoretical loss power is calculated according to the user theoretical power and the metering data, including:

[0132] S505: Calculate the user measured power of each user in the statistical period.

[0133] Specifically, the user measured power in the statistical period T can be calculated by the following formula: W 用户实测电量 T1表码 T0表码 T1表码 , wherein W T0表码 represents the table code data at the end of the statistical period T; W 用户理论电量 represents the table code data at the beginning of the statistical period T; and β represents the conversion ratio between the table code data and the electric energy, which is related to the use scenario of the electric energy meter (for example, whether a current transformer or a voltage transformer is installed).

[0134] S506: Calculate the user theoretical loss power of the same user according to the user theoretical power and the user measured power of the same user.

[0135] , wherein the user theoretical loss power is calculated according to the difference between the user theoretical power and the user measured power of the same user.

[0136] S507: Accumulate and sum the user theoretical loss power of all users in the to-be-tested substation to obtain the substation theoretical loss power.

[0137] ​​​​​​​Specifically, steps S505 to S507 above describe a specific implementation method for calculating the theoretical power loss of a distribution area. The theoretical power consumption of a single user within the statistical period is defined as W. 用户理论电量 The user's actual measured power consumption is W. 用户实测电量 The theoretical power loss W for a single user 用户理论损失电量 =W 用户理论电量 -W 用户实测电量 The theoretical power loss W for all users 用户理论损失电量 Summation is performed to calculate the theoretical power loss W of the transformer area. 台区理论损失电量 =∑W 用户理论损失电量 .

[0138] See Figure 5 As shown, after calculating the theoretical power loss of the transformer area based on the user's theoretical power consumption and the collected data, the transformer area line loss evaluation method of this application also includes:

[0139] S508: Obtain the statistical line loss power of the transformer area within the statistical period.

[0140] In some embodiments, obtaining the statistical line loss of a transformer substation within a statistical period includes: obtaining the power supplied to the substation and the total power consumption of users in the substation under test within the statistical period; and calculating the statistical line loss of the substation based on the power supplied to the substation and the total power consumption of users. Specifically, the statistical line loss of the substation is calculated by subtracting the total measured power consumption of all users from the total measured power consumption of the substation's main meter.

[0141] S509: When the deviation between the statistical line loss of the transformer area and the theoretical line loss of the transformer area exceeds the preset threshold, the statistical line loss of the transformer area is determined to be abnormal.

[0142] The preset threshold is based on the detection accuracy of the main meter in the distribution area and the user's electricity meter, as well as the electricity consumption loss of the electricity meter. The preset threshold can be set as the upper limit threshold for net electricity deviation, or the upper limit threshold for electricity deviation rate.

[0143] Therefore, the technical solution of the present invention, based on different calculation strategies, enables the master station to be compatible with the calculation of theoretical power loss of transformer areas under different scenarios, and combines the theoretical power loss of transformer areas to realize the evaluation of transformer area line loss, thereby improving the practicality of the evaluation strategy.

[0144] Example 2

[0145] Based on the same inventive concept, Embodiment 2 of the present invention provides a transformer substation line loss evaluation device, which can execute the transformer substation line loss evaluation method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method. In this embodiment, a metering device is configured in the transformer substation, which is used to collect metering data of the transformer substation to be tested and send the metering data to the main station.

[0146] Figure 6This is a schematic diagram of a transformer substation line loss evaluation device provided in Embodiment 2 of the present invention. Figure 6 As shown, the transformer area line loss assessment device includes: a strategy selection module 101, a metering equipment assessment module 102, and a master station assessment module 103. The strategy selection module 101 is used to select a target assessment strategy, which includes an equipment-side assessment strategy and a master station-side assessment strategy. The metering equipment assessment module 102, located at the metering equipment end, is used to execute the equipment-side assessment strategy, specifically: acquiring metering data from the metering equipment within a statistical period; calculating the theoretical electricity consumption of users within the statistical period based on a first calculation strategy and the metering data; and calculating the theoretical power loss of the transformer area based on the theoretical electricity consumption of users and the metering data. The master station assessment module 103, located at the master station end, is used to execute the master station-side assessment strategy, specifically: acquiring collected data read from the metering equipment at the master station; matching a second calculation strategy based on the data type of the collected data; calculating the theoretical electricity consumption of users within the statistical period based on the second calculation strategy and the collected data; and calculating the theoretical power loss of the transformer area based on the theoretical electricity consumption of users and the collected data. The first and second calculation strategies are established based on the theoretical scenario of lossless transmission of transformer area power supply voltage to the user end.

[0147] Optionally, the metering data includes: total meter readings, transformer area power supply voltage, user phase information, user readings, and user voltage.

[0148] Optionally, the metering equipment evaluation module 102 is configured to: perform segmented statistics on the power supply voltage of the distribution area, the user voltage, and the user's measured electricity, forming a three-phase voltage sequence of the distribution area, a user voltage sequence for each user, and a user measured electricity sequence for each user; extract the corresponding phase of the distribution area voltage sequence from the three-phase voltage sequence of the distribution area based on the user phase information of any user; calculate the theoretical electricity for a single time period based on the data of the same time period in the distribution area voltage sequence, user voltage sequence, and user measured electricity sequence; and sum up the theoretical electricity for a single time period for all time periods within the statistical period to obtain the user's theoretical electricity.

[0149] Optionally, the main station evaluation module 103 is configured to: when collecting voltage data and meter reading data, segment and statistically analyze the meter reading data of each user to form the user's measured power consumption sequence, and segment and statistically analyze the voltage data of each user to form the three-phase voltage sequence of the transformer area and the user's voltage sequence of each user; obtain the user's phase information of each user, and extract the corresponding phase of the transformer area voltage sequence from the three-phase voltage sequence of the transformer area based on the user's phase information of any user; calculate the theoretical power consumption of a single time period based on the data of the same time period in the transformer area voltage sequence, user voltage sequence, and user measured power consumption sequence; and sum the theoretical power consumption of a single time period for all time periods within the statistical period to obtain the user's theoretical power consumption.

[0150] Optionally, the master station evaluation module 103 is configured to: when the collected data is power correlation data and daily frozen table code data, calculate the user measured power of each user in the statistical period according to the daily frozen table code data; calculate the user measured power data and the user theoretical power data of the lossless conduction of the supply voltage of the transformer area to the user end in the statistical period according to the power correlation data; calculate the user theoretical power of the same user according to the user measured power, the user measured power data and the user theoretical power data.

[0151] Optionally, the master station evaluation module 103 is configured to: when the collected data is voltage data and daily frozen table code data, calculate the average voltage of each phase of the transformer area and the average voltage of the user according to the voltage data; calculate the user measured power of each user in the statistical period according to the daily frozen table code data; obtain the user phase information of each user, and obtain the average voltage of the transformer area of the corresponding phase from the average voltage of each phase of the transformer area according to the user phase information of any user; calculate the user theoretical power according to the user measured power, the average voltage of the transformer area and the average voltage of the user.

[0152] Optionally, the metering equipment evaluation module 102 and the master station evaluation module 103 are further configured to: calculate the user measured power of each user in the statistical period; calculate the user theoretical loss power of the same user according to the user theoretical power and the user measured power; and accumulate and sum the user theoretical loss power of all users in the transformer area to be tested to obtain the transformer area theoretical loss power.

[0153] Optionally, the metering equipment evaluation module 102 and the master station evaluation module 103 are further configured to: after calculating the transformer area theoretical loss power according to the user theoretical power and the collected data, obtain the transformer area statistical line loss power in the statistical period; when the deviation data between the transformer area statistical line loss power and the transformer area theoretical loss power exceeds a preset threshold, determine that the transformer area statistical line loss is abnormal; wherein the preset threshold is set based on the accuracy of the transformer area electric energy meter and the electric energy meter power consumption.

[0154] Optionally, the metering equipment evaluation module 102 and the master station evaluation module 103 are further configured to: obtain the transformer area supply power and the total user power of the transformer area to be tested in the statistical period; and calculate the transformer area statistical line loss power according to the transformer area supply power and the total user power.

[0155] Embodiment three

[0156] According to another aspect of the present application, an electronic device is provided, which comprises at least one processor and a memory connected with the at least one processor in communication; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the transformer area line loss evaluation method.

[0157] Figure 7A schematic diagram of an electronic device that can be used to implement the transformer area line loss evaluation method of embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0158] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0159] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0160] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the transformer substation line loss evaluation method.

[0161] In some embodiments, the above-described transformer line loss evaluation method can be implemented as a computer program tangibly embodied in a computer readable storage medium, e.g., storage unit 18. In some embodiments, parts or all of the computer program can be loaded and / or installed onto electronic device 10 via, e.g., ROM 12 and / or communication unit 19. When the computer program is loaded onto RAM 13 and executed by processor 11, one or more steps of the above-described transformer line loss evaluation method can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the above-described transformer line loss evaluation method by other means, e.g., with the aid of firmware.

[0162] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, specially designed application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0163] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed by the processor of the machine, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0164] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0165] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0166] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0167] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0168] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0169] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for evaluating line loss of a transformer area, wherein a metering device is configured in the transformer area, the metering device is used to collect metering data of the transformer area to be measured, and the metering data is sent to a master station, characterized in that, The method comprises: selecting a target evaluation strategy, the target evaluation strategy comprising a device-side evaluation strategy and a master station-side evaluation strategy; acquiring the metering data of the metering device in a statistical period while executing the device-side evaluation strategy, calculating user theoretical power in the statistical period based on a first calculation strategy and the metering data, and calculating substation theoretical loss power according to the user theoretical power and the metering data; acquiring acquisition data read by the master station from the metering device while executing the master station-side evaluation strategy, matching a second calculation strategy according to the data type of the acquisition data, calculating user theoretical power in the statistical period based on the second calculation strategy and the acquisition data, and calculating substation theoretical loss power according to the user theoretical power and the acquisition data; wherein the first calculation strategy and the second calculation strategy are established based on a theoretical scenario of lossless conduction of substation power supply voltage to the user side; the metering data comprises total metered power, substation power supply voltage, user phase information, user metered power, and user voltage; the calculation of user theoretical power in the statistical period based on the first calculation strategy and the metering data comprises: segmented statistics are respectively performed on the substation power supply voltage, the user voltage, and the user metered power to form a substation three-phase voltage sequence, a user voltage sequence of each user, and a user metered power sequence of each user; the user voltage sequence of each user is obtained from the substation three-phase voltage sequence according to the user phase information of any user; single-period theoretical power in a same period is calculated according to data in the same period in the substation voltage sequence, the user voltage sequence, and the user metered power sequence; the single-period theoretical power of all periods in the statistical period is accumulated and summed to obtain the user theoretical power; the calculation of substation theoretical loss power according to the user theoretical power and the metering data comprises: user metered power of each user in the statistical period is calculated; user theoretical loss power of the same user is calculated according to the user theoretical power and the user metered power of the same user; the user theoretical loss power of all users in the to-be-tested substation is accumulated and summed to obtain the substation theoretical loss power.

2. The method of claim 1, wherein, when the acquisition data is voltage data and meter code data, the calculation of user theoretical power in the statistical period based on the second calculation strategy and the acquisition data comprises: segmented statistics are performed on the meter code data of each user to form a user metered power sequence of each user, and segmented statistics are performed on the voltage data of each user to form a substation three-phase voltage sequence and a user voltage sequence of each user; user phase information of each user is acquired, and the user voltage sequence of each user is obtained from the substation three-phase voltage sequence according to the user phase information of any user; single-period theoretical power in a same period is calculated according to data in the same period in the substation voltage sequence, the user voltage sequence, and the user metered power sequence; the single-period theoretical power of all periods in the statistical period is accumulated and summed to obtain the user theoretical power.

3. The method of claim 1, wherein, When the collected data are power correlation data and daily frozen table code data, the calculating the user theoretical power consumption in the statistical period based on the second calculation strategy and the collected data comprises: calculating user measured power consumption of each user in the statistical period according to the daily frozen table code data; calculating user measured power data in the statistical period and user theoretical power data of lossless conduction of supply voltage to user end according to the power correlation data; calculating the user theoretical power consumption according to the user measured power consumption, the user measured power data and the user theoretical power data of the same user.

4. The method of claim 1, wherein, When the collected data are voltage data and daily frozen table code data, the calculating the user theoretical power consumption in the statistical period based on the second calculation strategy and the collected data comprises: calculating each phase average voltage of the transformer area and user average voltage according to the voltage data; calculating user measured power consumption of each user in the statistical period according to the daily frozen table code data; obtaining user phase information of each user, and obtaining transformer area average voltage of corresponding phase from each phase average voltage of the transformer area according to the user phase information of any user; calculating the user theoretical power consumption according to the user measured power consumption, the transformer area average voltage and the user average voltage.

5. The method of claim 1 to 4, wherein, After the calculating the transformer area theoretical loss power consumption according to the user theoretical power consumption and the collected data, further comprising: obtaining transformer area statistical line loss power consumption in the statistical period; when deviation data between the transformer area statistical line loss power consumption and the transformer area theoretical loss power consumption exceeds a preset threshold, determining that transformer area statistical line loss is abnormal; wherein the preset threshold is set based on transformer area electric energy meter accuracy and electric energy meter power consumption.

6. The method of claim 5, wherein, The obtaining the transformer area statistical line loss power consumption in the statistical period comprises: obtaining transformer area supply power consumption in the statistical period and total user power consumption of the transformer area to be tested; calculating the transformer area statistical line loss power consumption according to the transformer area supply power consumption and the total user power consumption.

7. A device for evaluating line loss of a transformer area, wherein the transformer area is provided with a metering device, the metering device is configured to collect metering data of the transformer area to be measured and send the metering data to a master station, characterized in that, The device for executing the transformer area line loss evaluation method in any one of claims 1 to 6 comprises: a strategy selection module configured to select a target evaluation strategy, the target evaluation strategy comprising a device end evaluation strategy and a master station end evaluation strategy; a metering device evaluation module configured to execute the device end evaluation strategy at a metering device end, and specifically configured to: obtain metering data of the metering device in a statistical period, calculate user theoretical power consumption in the statistical period based on a first calculation strategy and the metering data, and calculate transformer area theoretical loss power consumption according to the user theoretical power consumption and the metering data; a master station evaluation module configured to execute the master station end evaluation strategy at a master station end, and specifically configured to: obtain collected data read by the master station from the metering device, match a second calculation strategy according to a data type of the collected data, calculate user theoretical power consumption in the statistical period based on the second calculation strategy and the collected data, and calculate transformer area theoretical loss power consumption according to the user theoretical power consumption and the collected data. The first and second calculation strategies are based on the theoretical scenario of lossless transmission of power supply voltage from the distribution area to the user end.

8. An electronic device, comprising: The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the transformer area line loss evaluation method according to any one of claims 1 to 6.

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