A method, device and electronic equipment for locating line loss in a transformer area

Abstract

The present invention discloses a method, device and electronic device for locating line loss in a transformer area, wherein the method comprises: for a transformer area detected to have line loss, checking its household-to-transformer relationship, after completing the verification and correction of the household-to-transformer relationship, comparing the power consumption data of each user in the corrected household-to-transformer relationship when there is still line loss that does not meet the requirements, and performing a secondary comparison on the users with abnormal power consumption data in combination with the synchronized data in other concentrators associated with the target concentrator where the users are located, eliminating the misjudgment of abnormal users caused by communication and other questions and answers, and further determining the possibility that the user is an abnormal user when the consistency of the comparison result meets the requirements, and sending the location information of the target concentrator where the abnormal user is located to the verification terminal for investigation. Compared with the traditional blind and large-scale investigation method, the scheme recorded in the present application accurately narrows the investigation scope and improves the efficiency of investigating abnormal users.

Description

Technical Field

[0001] The present invention relates to the field of power monitoring technology, and in particular to a method, device, electronic equipment and computer-readable storage medium for locating line losses in a transformer area. Background Art

[0002] The synchronous line loss in the substation area refers to the active power loss caused by a transformer or a group of transformers in the process of distributing electric energy due to technical defects or insufficient management within a given period of time. The synchronous line loss in the substation area is an important indicator for evaluating the operation of electric power. Strengthening the management of synchronous line loss in the substation area is conducive to continuously improving the economic operation level of the power grid and further promoting energy conservation and emission reduction.

[0003] The main factors of line loss in the substation area caused by insufficient management include the theft of electricity by users. At present, the investigation of whether there is theft of electricity is mainly carried out by manual investigation of each line and each meter. The number of users to be investigated is large and the efficiency is low. Therefore, it is urgent to propose a more intelligent and accurate method for locating substation line loss to improve the efficiency of investigation. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a method, device and electronic device for locating line loss in a transformer area to solve the problem of low efficiency of the existing method of checking electric meters.

[0005] According to the first aspect, an embodiment of the present invention provides a method for locating line loss in a substation, which is applied to a substation management system, wherein the substation management system is communicatively connected to concentrators of multiple substations, and the concentrator of each substation is communicatively connected to at least one other concentrator in the same substation, and each concentrator uploads the connected meter data and synchronizes the meter data with timestamps to other concentrators communicatively connected to it; the method includes: when line loss occurs in any substation, sending user identity authentication information encrypted with the substation private key to the user meter side in the substation household-to-substation relationship corresponding to the substation through the concentrator, wherein the user meter side of each substation pre-stores the public key of the corresponding substation; determining whether the electricity user displayed in the substation household-to-substation relationship is a real user belonging to the substation based on the response information received from the user side electricity users; users who do not belong to the substation are deleted from the line loss calculation process of the substation and the household-to-transformer relationship of the substation is corrected according to the response result; when the corrected substation line loss is still higher than the preset line loss threshold, the electricity consumption data of each user participating in the line loss calculation in the substation is compared with the historical electricity consumption data of the user in the same period; when the comparison result is abnormal, an electricity data acquisition instruction is sent to other concentrators associated with the target concentrator where the abnormal user is located, so that the other associated concentrators send the electricity consumption data of the same user received during the same period when receiving the electricity data acquisition instruction; the electricity consumption data obtained from the target concentrator is compared with the electricity consumption data of other associated concentrators for consistency, and when the consistency comparison result meets the requirements, the location information of the target concentrator is sent to the verification terminal.

[0006] Optionally, the substation management system is communicatively connected with the user water meters and gas meters in each substation; before sending the electricity consumption data acquisition instruction to other concentrators associated with the target concentrator where the abnormal user is located, the method also includes: acquiring the water consumption data and gas consumption data of the abnormal user in the current time period; determining whether the user with an abnormal comparison result has abnormal electricity consumption based on the historical normal water consumption data, normal gas consumption data and corresponding historical normal electricity consumption data of the abnormal user in the same period, and the electricity consumption data, water consumption data and gas consumption data of the abnormal user in the current time period; when it is determined that there is abnormal electricity consumption, stopping the sending operation of responding to the data acquisition instruction and sending the location information of the target concentrator where the abnormal user is located to the verification terminal.

[0007] Optionally, the method further includes: for any substation, obtaining the user voltage data connected to all concentrators in the substation; performing similarity calculation on all concentrators in the substation according to the user voltage data connected to the concentrator using a preset similarity calculation algorithm; for each concentrator, selecting multiple concentrators whose similarity with the concentrator meets a preset similarity threshold, and selecting other concentrators for communication connection with the concentrator from the multiple concentrators according to the shortest communication distance.

[0008] Optionally, the method also includes: sending a monitoring instruction to the concentrator, so that the concentrator that receives the monitoring instruction compares the power consumption data with the power consumption data of other associated concentrators when it is synchronized, and sends a warning signal to the substation management system when the comparison result does not meet the requirements.

[0009] Optionally, the method further includes: obtaining a topological structure diagram of the substation area where line loss occurs; and updating the topological structure diagram according to the corrected substation-household-transformer relationship.

[0010] Optionally, when line loss occurs in any substation, before sending user identity authentication information encrypted by the substation private key to the user meter side in the substation-user-transformer relationship corresponding to the substation through the concentrator, the method also includes: obtaining power supply line parameters, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods of transformers in multiple substations; training the target neural network model according to the power supply line parameters, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods of transformers in multiple substations to obtain a substation line loss prediction model, and the substation line loss prediction model is used to calculate the theoretical line loss value of any substation.

[0011] Optionally, the method also includes: responding to the call operation of the substation line loss prediction model at a preset interval; calculating the theoretical line loss value of the target time for each substation in the area by calling the substation line loss prediction model; calculating the synchronous line loss according to the substation power supply data and power sales data of each substation during the same period; when the synchronous line loss calculation result of any substation is greater than the corresponding theoretical line loss value, it is determined that line loss has occurred in the substation and responding to the positioning operation of the substation line loss.

[0012] According to the second aspect, an embodiment of the present invention provides a substation line loss locating device, which is applied to a substation management system, wherein the substation management system is communicatively connected to concentrators of multiple substations, and the concentrator of each substation is communicatively connected to at least one other concentrator in the same substation, and each concentrator uploads the connected meter data and synchronizes the meter data with timestamps to other concentrators communicatively connected to it; the device includes: a first sending module, which is used to send user identity authentication information encrypted with the substation private key to the user meter side in the substation household-to-substation relationship corresponding to the substation through the concentrator when line loss occurs in any substation, wherein the user meter side of each substation pre-stores the public key of the corresponding substation; a first determination module, which is used to determine whether the electricity user displayed in the substation household-to-substation relationship is a real electricity user belonging to the substation according to the response information received from the user side; and a correction module A block is used to delete users who do not belong to the substation from the line loss calculation process of the substation and correct the household-to-transformer relationship of the substation according to the response result; a first comparison module is used to compare the electricity consumption data of each user participating in the line loss calculation in the substation with the historical electricity consumption data of the user in the same period when the corrected substation line loss is still higher than the preset line loss threshold; a second sending module is used to send an electricity data acquisition instruction to other concentrators associated with the target concentrator where the abnormal user is located when an abnormality occurs in the comparison result, so that the other associated concentrators send the electricity consumption data of the same user received during the same time when they receive the electricity data acquisition instruction; a second comparison module is used to compare the electricity consumption data obtained from the target concentrator with the electricity consumption data of other associated concentrators for consistency, and when the consistency comparison result meets the requirements, send the location information of the target concentrator to the verification terminal.

[0013] According to the third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the substation line loss locating method described in the first aspect or any optional implementation manner of the first aspect by executing the computer instructions.

[0014] According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the substation line loss locating method described in the first aspect or any optional implementation manner of the first aspect.

[0015] The method for locating line loss in a substation area provided by an embodiment of the present invention is applied to a substation area management system. The substation area management system is connected to the concentrators of multiple substation areas in communication. The concentrator of each substation area is connected to at least one other concentrator in the same substation area in communication. Each concentrator uploads the meter data connected to the substation area and synchronizes the meter data with timestamps to other concentrators connected to the concentrators in communication. When line loss occurs in any substation area, the concentrator sends user identity authentication information encrypted with the substation area private key to the user meter side in the substation area household-to-substation relationship corresponding to the substation area, wherein the user meter side of each substation area stores the public key of the corresponding substation area in advance. According to the response information received from the user side, it is determined whether the electricity user displayed in the substation area household-to-substation relationship is a real electricity user belonging to the substation area. For those who are not affiliated to the substation area, the user identity authentication information encrypted with the substation area private key is sent to the user meter side in the substation area household-to-substation relationship. Users belonging to the substation are deleted from the line loss calculation process of the substation and the household-transformer relationship in the substation is corrected according to the response result; when the corrected substation line loss is still higher than the preset line loss threshold, the electricity consumption data of each user participating in the line loss calculation in the substation is compared with the user's historical electricity consumption data for the same period; when the comparison result is abnormal, a power data acquisition instruction is sent to other concentrators associated with the target concentrator where the abnormal user is located, so that when the other associated concentrators receive the power data acquisition instruction, they send the received electricity consumption data of the same user within the same time; the power consumption data obtained from the target concentrator is compared with the power consumption data of other associated concentrators for consistency, and when the consistency comparison result meets the requirements, the location information of the target concentrator is sent to the verification terminal. By using the method described in the embodiment of the present application, for a substation detected to have line loss, first check its household-to-substation relationship. After completing the verification and correction of the household-to-substation relationship, if there is still line loss that does not meet the requirements, compare the electricity consumption data of each user in the corrected household-to-substation relationship, and perform a secondary comparison on the users with abnormal electricity consumption data in combination with the synchronized data in other concentrators associated with their target concentrator to eliminate misjudgment of abnormal users caused by questions and answers such as the target concentrator's own communication. When the consistency of the comparison result meets the requirements, further determine the possibility that the user is an abnormal user, and send the location information of the target concentrator where the abnormal user is located to the verification terminal for investigation. Compared with the traditional blind and large-scale investigation method, the scheme described in the embodiment of the present application accurately narrows the investigation scope, improves the investigation efficiency of abnormal users, and achieves timely intervention in abnormal electricity usage behaviors such as electricity theft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a flow chart of a method for locating line loss in a station area according to an embodiment of the present invention;

[0018] Figure 2 is a structural block diagram of a station area line loss locating device according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] According to an embodiment of the present invention, an embodiment of a method for locating line loss in a substation is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0022] In this embodiment, a method for locating line loss in a substation is provided, which is applied to a substation management system. The substation management system is connected to concentrators in multiple substations in communication, and the concentrator in each substation is connected to at least one other concentrator in the same substation in communication. Each concentrator uploads the meter data connected to the access and synchronizes the meter data with timestamps to other concentrators connected to the concentrators in communication. Figure 1 As shown, the process includes the following steps:

[0023] Step 101, when line loss occurs in any substation, the concentrator sends user identity authentication information encrypted with the substation private key to the user meter side in the substation household-to-substation relationship corresponding to the substation, wherein the user meter side of each substation pre-stores the public key of the corresponding substation;

[0024] Exemplarily, the substation management system can simultaneously detect and monitor line losses in multiple substations, and a substation line loss monitoring cycle can be set. The substation management system implements periodic multi-substation polling monitoring operations according to the monitoring cycle; the specific method of calculating the line loss of the monitored substation can be to complete the line loss value calculation based on the substation-household-transformer relationship of the corresponding substation and the user's electricity consumption data in the household-transformer relationship uploaded by the concentrator within a certain period of time and the power supply data of the substation, and complete the theoretical line loss value calculation for each substation in combination with the inherent line loss value caused by technical problems such as lines calculated in advance during the substation design, and when the line loss value calculation result is greater than the acceptable theoretical line loss value of the substation, it is determined that line loss has occurred in the current substation.

[0025] For any substation where line loss occurs, the concentrator sends user identity authentication information encrypted with the substation's own private key to the user meter side in the household change relationship corresponding to the substation. The meter that receives the user identity authentication information needs to use the public key of the substation to complete the decryption to obtain the specific content of the user identity authentication information. In the embodiment of the present application, the public key stored on each user's meter side changes dynamically according to the substation to which it belongs, that is, if the household change relationship of any user changes, the substation management system will dynamically update the public key of the substation it saves in a timely manner.

[0026] Step 102, determining whether the electricity user displayed in the transformer-to-electricity relationship is a real electricity user belonging to the transformer area according to the response information received from the user side;

[0027] Exemplarily, after the user completes decryption using the public key of the corresponding substation, he can make a targeted response according to the information that needs the user to respond contained in the user identity authentication information, and feed the response information back to the substation management system through the concentrator, so that the substation management system can complete the verification of the substation household-to-substation relationship according to the accuracy of the response information, so as to determine whether the electricity user displayed by the current substation household-to-substation relationship is the real electricity user of the substation, and avoid the miscalculation of the substation line loss and the false alarm of the substation line loss due to the failure to update the substation household-to-substation relationship in time or the error in the record of the household-to-substation relationship. The public and private key pairs of each substation can be generated in advance through a third-party platform and stored in the substation management system. When the household-to-substation relationship in the substation is determined, the public key of the substation is sent to the corresponding user side. Specifically, users who have not received the response information or the response information type is wrong can be judged as real users who do not belong to the current substation. At the same time, in order to avoid misjudgment caused by communication errors between the concentrator that forwards the user side information and the substation management system, the secondary user identity authentication information can be sent again for users who have not received the response information or the response information type is wrong.

[0028] Step 103, deleting users who do not belong to the said area from the line loss calculation process of the said area and correcting the user-to-user relationship of the said area according to the response result;

[0029] For example, users who are determined not to belong to the substation where line loss is currently occurring are deleted from the line loss calculation for the substation. At the same time, there may be users whose response information is accurate but who are not promptly and accurately included in the household-change relationship. In this regard, the household-change relationship is corrected based on the deleted users and the newly added users, and the power consumption data of the users in the corrected household-change relationship are used to recalculate the line loss for the substation.

[0030] Step 104, when the corrected area line loss is still higher than the preset line loss threshold, the power consumption data of each user participating in the line loss calculation in the area is compared with the historical power consumption data of the user in the same period;

[0031] For example, when the corrected line loss in the substation is still higher than the preset line loss threshold, it indicates that the line loss is still higher than the theoretical standard line loss threshold when the household-to-substation relationship is normal, indicating that the current substation may have abnormal electricity usage such as user electricity theft. The embodiment of the present application further compares the electricity usage data of each user participating in the recalculation of the line loss with the historical electricity usage data of the user in the same period. The historical electricity usage data in the same period is the electricity usage data of normal electricity usage in the same period without line loss. At the same time, in order to ensure the accuracy of the comparison result, multiple historical electricity usage data in the same period under normal conditions can be continuously or intermittently obtained to participate in the comparison operation.

[0032] Step 105, when an abnormality is found in the comparison result, a power consumption data acquisition instruction is sent to other concentrators associated with the target concentrator where the abnormal user is located, so that other associated concentrators send the power consumption data of the same user received during the same period upon receiving the power consumption data acquisition instruction;

[0033] For example, when the comparison result is abnormal, it indicates that the user may have abnormal electricity use such as electricity theft. In order to avoid communication failure between the concentrator connected to the user and the substation management system, which may lead to user electricity data transmission errors in the current cycle, an electricity data acquisition instruction is sent to other concentrators associated with its target concentrator, so that other associated concentrators send the electricity data of the same user received in the same time when receiving the electricity data acquisition instruction. The electricity data of the same user in the same period is uploaded again by the associated concentrator, which verifies the accuracy of the received electricity data of the user and avoids misjudgment of abnormal electricity users caused by transmission communication failure or data collection abnormality of the concentrator.

[0034] In step 106, the power consumption data obtained from the target concentrator is compared with the power consumption data of other associated concentrators for consistency. When the consistency comparison result meets the requirements, the location information of the target concentrator is sent to the verification terminal.

[0035] Exemplarily, when the consistency comparison result between the electricity consumption data obtained from the target concentrator and the electricity consumption data of other associated concentrators meets the requirements, that is, the error of the data transmitted through different communication terminals is within the theoretical error range or is the same, it indicates that the electricity consumption data received by the abnormal user is accurate, and further indicates the accuracy of its abnormal judgment result. The abnormal electricity user has the possibility of stealing electricity or abnormal electricity consumption. At this time, the location information of the target concentrator is sent to the verification terminal. The verification terminal can be the terminal used by the investigator and generates a corresponding investigation work order, so that the investigator can conduct an investigation on the abnormal electricity consumption of the user based on the location information of the target concentrator.

[0036] The method for locating line loss in a substation provided in an embodiment of the present invention first checks the household-to-substation relationship of a substation detected to have line loss. After the verification and correction of the household-to-substation relationship, if there is still line loss that does not meet the requirements, the electricity consumption data of each user in the corrected household-to-substation relationship is compared, and for users with abnormal electricity consumption data, a secondary comparison is performed with the synchronized data in other concentrators associated with their target concentrator to eliminate misjudgment of abnormal users caused by communication and other questions and answers. When the consistency of the comparison result meets the requirements, the possibility of the user being an abnormal user is further determined, and the location information of the target concentrator where the abnormal user is located is sent to the verification terminal for investigation. Compared with the traditional blind and large-scale investigation method, the scheme recorded in the embodiment of the present application accurately narrows the investigation scope, improves the investigation efficiency of abnormal users, and realizes timely intervention in abnormal electricity use behaviors such as electricity theft.

[0037] As an optional implementation of the embodiment of the present invention, the substation management system is communicatively connected with the user water meter and gas meter in each substation; before sending the electricity consumption data acquisition instruction to other concentrators associated with the target concentrator where the abnormal user is located, the method also includes: acquiring the water consumption data and gas consumption data of the abnormal user in the current time period; determining whether the user with an abnormal comparison result has abnormal electricity consumption based on the historical normal water consumption data, normal gas consumption data and corresponding historical normal electricity consumption data of the abnormal user in the same period, and the electricity consumption data, water consumption data and gas consumption data of the abnormal user in the current time period; when it is determined that there is abnormal electricity consumption, stop responding to the sending operation of the data acquisition instruction and send the location information of the target concentrator where the abnormal user is located to the verification terminal.

[0038] Exemplarily, the substation management system is communicated with the user water meter and gas meter in each substation, and obtains the water usage data and gas usage data of the abnormal user in the current time period from the user water meter and gas meter respectively, and combines the correlation between the normal water usage data, normal gas usage data and the corresponding normal electricity usage data in the same period in history of the abnormal user to determine the difference between the relationship between the user's electricity usage data, water usage data and gas usage data in the current time period and the correlation between these three data in history.

[0039] Specifically, multiple historical normal water use data, normal gas use data and historical normal electricity use data for the same period can be obtained, and statistics can be obtained on the changes in electricity use data corresponding to the water use data and gas use data during peak or trough periods, or the correlation between the user's water, gas and electricity use at a specific time point. After the correlation between the three is determined, the water use data, gas data and electricity use data of the current period can be obtained to determine whether the electricity use data of the current period is abnormal during the peak, trough or specific period. When it is determined that there is abnormal electricity use, the sending operation of responding to the data acquisition instruction is stopped, and the location information of the target concentrator where the abnormal user is located is directly sent to the verification terminal, that is, there is no need to obtain data from the associated concentrator again. By counting the relationship between the user's historical daily water, gas and electricity use, the change law of the third parameter can be determined by using two of the parameters to determine whether the third parameter (electricity use data) is abnormal, and verification is performed in time when an abnormality occurs, thereby improving the timeliness of abnormal electricity use investigation.

[0040] As an optional implementation of the embodiment of the present invention, the method also includes: for any substation, obtaining user voltage data connected to all concentrators in the substation; based on the user voltage data connected to the concentrator, using a preset similarity calculation algorithm to perform similarity calculation on all concentrators in the substation; for each concentrator, selecting multiple concentrators whose similarity with the concentrator meets a preset similarity threshold, and selecting other concentrators from the multiple concentrators to communicate with the concentrator according to the shortest communication distance.

[0041] Exemplarily, the embodiment of the present application may use Euclidean distance, Manhattan distance algorithm or cosine similarity function to determine the similarity of any two concentrators. Specifically, taking Euclidean distance as an example, the voltage data of multiple meters connected to the two concentrators may be respectively calculated by Euclidean distance, and the Euclidean distances of the multiple voltages calculated may be respectively accumulated, and the similarity is determined according to the accumulated results. For example, concentrator A is connected to 3 meters, and concentrator B is connected to 3 meters. Similarity calculations are performed between meters belonging to different concentrators to generate nine similarity calculation results, and the nine similarity calculation results are accumulated as the similarity between concentrator A and concentrator B. Similarly, concentrator A or concentrator B and other concentrators also use the same calculation method, and finally select the first N similarities that meet the similarity threshold requirements as alternatives, such as selecting the first 3 as alternatives for concentrator A, and then select the concentrator with the shortest communication distance with concentrator A from the three alternative concentrators to be associated as other concentrators associated with concentrator A for synchronizing the power consumption data of concentrator A. By selecting other concentrators to be associated through similarity calculation, the performance parameters of the selected concentrators can be made more similar, avoiding the synchronized data from exceeding the identifiable or transmittable range of the associated concentrators. At the same time, selecting the concentrator with the closest communication distance as the associated concentrator saves the communication cost between concentrators and ensures the security, stability and accuracy of data synchronization.

[0042] As an optional implementation of the embodiment of the present invention, the method also includes: sending a monitoring instruction to the concentrator, so that the concentrator that receives the monitoring instruction compares the power consumption data with the power consumption data of other associated concentrators when it is synchronized, and when the comparison result does not meet the requirements, sends a warning signal to the substation management system.

[0043] Exemplarily, when the substation management system processes too much data, the substation management system can send monitoring instructions to any one or more concentrators connected to it for communication, so that the concentrator that receives the monitoring instructions can compare the received power consumption data with the power consumption data of other associated concentrators when it is synchronized. When the comparison result does not meet the requirements, an early warning signal is sent to the substation management system in a timely manner, so that the substation management system can enable the line loss calculation operation of the substation when receiving the early warning signal. That is, by passively triggering the substation management system to calculate the line loss of a specific substation where an early warning signal has appeared, the processing resources of the substation management system can be saved.

[0044] Specifically, the substation management system can pre-send a comparison program to the processing units of one or more concentrators and store it in the storage units of the corresponding concentrators. When receiving a monitoring instruction, the comparison program is triggered to run, and the comparison operation is performed when the power consumption data of other concentrators is synchronized. The embodiment of the present application does not limit the specific comparison logic of the comparison program. For example, it can be to compare the data of the same concentrator in multiple time periods synchronized before and after to determine whether the power consumption data of the concentrator is inconsistent or mutated in different time periods; or when the power consumption habits of users of the associated concentrators are similar, the synchronized user's power consumption data can be compared with the meter data connected to itself to determine whether the synchronized power consumption data is abnormal.

[0045] As an optional implementation of the embodiment of the present invention, the method further includes: obtaining a topological structure diagram of the substation area where line loss occurs; and updating the topological structure diagram according to the corrected substation area household transformer relationship. By updating the topological structure diagram of the substation area where line loss occurs in real time, it is convenient for technical personnel to intuitively and accurately understand the current substation area household transformer relationship, so as to make timely intervention and adjustment.

[0046] As an optional implementation mode of the embodiment of the present invention, when line loss occurs in any substation, before sending the user identity authentication information encrypted by the substation private key to the user meter side in the substation-user-transformer relationship corresponding to the substation through the concentrator, the method also includes: obtaining power supply line parameters, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods of transformers in multiple substations; training the target neural network model according to the power supply line parameters, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods of transformers in multiple substations to obtain a substation line loss prediction model, and the substation line loss prediction model is used to calculate the theoretical line loss value of any substation.

[0047] For example, due to the inevitable basic losses incurred in the process of technology or line transmission in the substation, when determining whether there is line loss caused by human theft of electricity in the substation, it is necessary to first remove the basic loss. The theoretical line loss value is the line loss requirement that the substation should normally meet after removing the basic loss. The line loss rate of general economic operation needs to be reduced to less than 4%, and the daily line loss compliance rate is increased to more than 99.5%. The current line loss values ​​of different substations will also change due to the number of substation lines or users. In order to facilitate the subsequent calculation of the theoretical line loss value of the newly added substation or the substation where the household change relationship occurs, so as to improve the efficiency of determining whether the substation has theft of electricity and other situations, the embodiment of the present application combines the machine learning model to complete the construction of the substation line loss prediction model.

[0048] Specifically, power supply line parameters of transformers in multiple substations (such as the number of power supply lines, length, power supply line resistance, etc.), single-phase electricity user parameters (such as the number of single-phase users, the distance from the transformer, etc.), three-phase electricity user parameters (such as the number of three-phase users, the distance from the transformer, etc.) and corresponding theoretical line loss values ​​in different time periods are obtained. The theoretical line loss value may be a line loss value calculated or set at the initial stage of substation design. The embodiment of the present application does not limit the method for obtaining the theoretical line loss value and the type of each parameter used for training. Technical personnel in this field can select the parameter type that has a greater impact on the line loss for model training as needed; the target neural network model is trained according to the power supply line parameters of transformers in multiple substations, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods to obtain a substation line loss prediction model.

[0049] As an optional implementation of the embodiment of the present invention, the method also includes: responding to the call operation of the substation line loss prediction model according to a preset interval duration; calculating the theoretical line loss value of each substation in the area for the target duration by calling the substation line loss prediction model; calculating the synchronous line loss according to the substation power supply data and power sales data of each substation during the same period; when the synchronous line loss calculation result of any substation is greater than the corresponding theoretical line loss value, it is determined that line loss has occurred in the substation and responding to the positioning operation of the substation line loss.

[0050] Exemplarily, the substation management system can monitor line losses by polling all substations under its management at fixed intervals by calling the substation line loss prediction model, and compare the theoretical line loss value calculated by the substation line loss prediction model with the calculated line loss value for the same period of the current time period. When the calculated line loss result for the same period of any substation is greater than the corresponding theoretical line loss value requirement, it is determined that line loss has occurred in the substation and the substation that does not meet the theoretical line loss value requirement is responded to by performing line loss positioning operations according to the scheme recorded in the above embodiment, so as to promptly identify abnormal electricity users.

[0051] In this embodiment, a substation line loss locating device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. The term "module" used below can implement a combination of software and / or hardware of a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0052] This embodiment provides a substation line loss locating device, which is applied to a substation management system. The substation management system is connected to the concentrators of multiple substations in communication. The concentrator of each substation is connected to at least one other concentrator in the same substation in communication. Each concentrator uploads the meter data connected to it and synchronizes the meter data with timestamps to other concentrators connected to it in communication. Figure 2 As shown, the device comprises:

[0053] The first sending module 201 is used to send user identity authentication information encrypted with the private key of the substation to the user meter side in the substation-to-substation relationship corresponding to the substation through the concentrator when line loss occurs in any substation, wherein the user meter side of each substation stores the public key of the corresponding substation in advance;

[0054] The first determination module 202 is used to determine whether the electricity user displayed in the transformer-to-electricity relationship is a real electricity user belonging to the transformer-to-electricity area according to the response information received from the user side;

[0055] Correction module 203, used for deleting users not belonging to the substation area from the line loss calculation process of the substation area and correcting the substation area user-to-user relationship according to the response result;

[0056] The first comparison module 204 is used to compare the power consumption data of each user participating in the line loss calculation in the substation with the historical power consumption data of the user in the same period when the corrected substation line loss is still higher than the preset line loss threshold;

[0057] The second sending module 205 is used to send a power consumption data acquisition instruction to other concentrators associated with the target concentrator where the abnormal user is located when the comparison result is abnormal, so that the other associated concentrators send the power consumption data of the same user received during the same period when receiving the power consumption data acquisition instruction;

[0058] The second comparison module 206 is used to compare the power consumption data obtained from the target concentrator with the power consumption data of other associated concentrators, and when the consistency comparison result meets the requirements, the location information of the target concentrator is sent to the verification terminal. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0059] The substation line loss locating device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0060] The substation line loss locating device provided in the present embodiment first checks the household-to-substation relationship of the substation detected to have line loss. After completing the verification and correction of the household-to-substation relationship, if there is still line loss that does not meet the requirements, the electricity consumption data of each user in the corrected household-to-substation relationship is compared, and for users with abnormal electricity consumption data, a secondary comparison is made with the data synchronized in other concentrators associated with their target concentrator to eliminate misjudgment of abnormal users caused by communication and other questions and answers. When the consistency of the comparison result meets the requirements, the possibility of the user being an abnormal user is further determined, and the location information of the target concentrator where the abnormal user is located is sent to the verification terminal for investigation. Compared with the traditional blind and large-scale investigation method, the scheme recorded in the embodiment of the present application accurately narrows the investigation scope, improves the investigation efficiency of abnormal users, and realizes timely intervention in abnormal electricity usage behaviors such as electricity theft.

[0061] As an optional embodiment of the present invention, the device also includes: a first acquisition module, used to obtain the water usage data and gas usage data of the abnormal user in the current time period; a second determination module, used to determine whether the user with an abnormal result has abnormal electricity usage based on the correlation between the historical normal water usage data, normal gas usage data and the corresponding historical normal electricity usage data of the user with the abnormal period, and the electricity usage data, water usage data and gas usage data of the abnormal user in the current time period; a third sending module, used to stop responding to the sending operation of the data acquisition instruction and send the location information of the target concentrator where the abnormal user is located to the verification terminal when it is determined that there is abnormal electricity usage.

[0062] As an optional embodiment of the present invention, the device also includes: a second acquisition module, which is used to obtain the user voltage data connected to all concentrators in any substation; a first calculation module, which is used to perform similarity calculation on all concentrators in the substation according to the user voltage data connected to the concentrator using a preset similarity calculation algorithm; a selection module, which is used to select, for each concentrator, multiple concentrators whose similarity with the concentrator meets a preset similarity threshold, and select other concentrators for communication connection with the concentrator from the multiple concentrators according to the shortest communication distance.

[0063] As an optional embodiment of the present invention, the device also includes: a fourth sending module, used to send monitoring instructions to the concentrator, so that the concentrator that receives the monitoring instructions compares the power consumption data with the power consumption data of other associated concentrators when it is synchronized, and sends a warning signal to the substation management system when the comparison result does not meet the requirements.

[0064] As an optional implementation of the present invention, the device further includes: a third acquisition module, used to acquire a topological structure diagram of the substation where line loss occurs; an update module, used to update the topological structure diagram according to the corrected substation-user-transformer relationship.

[0065] As an optional embodiment of the present invention, the device also includes: a fourth acquisition module, used to obtain power supply line parameters of transformers in multiple substations, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods; a training module, used to train the target neural network model according to the power supply line parameters of transformers in multiple substations, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods, and obtain a substation line loss prediction model, which is used to calculate the theoretical line loss value of any substation.

[0066] As an optional embodiment of the present invention, the device also includes: a calling module, which is used to respond to the calling operation of the substation line loss prediction model according to a preset interval time; a second calculation module, which is used to calculate the theoretical line loss value of each substation in the area for a target time by calling the substation line loss prediction model; a third calculation module, which is used to calculate the synchronous line loss according to the substation power supply data and power sales data of each substation in the same period; a positioning module, which is used to determine that line loss has occurred in the substation and respond to the positioning operation of the substation line loss when the synchronous line loss calculation result of any substation is greater than the corresponding theoretical line loss value.

[0067] The further functional description of each of the above modules is the same as that of the above corresponding embodiments and will not be repeated here.

[0068] The embodiment of the present invention also provides an electronic device having the above Figure 2 The line loss locating device in the substation is shown.

[0069] See also Figure 3 , Figure 3 is a schematic diagram of a structure of a device provided by an optional embodiment of the present invention, such as Figure 3As shown, the device may include: at least one processor 601, such as a central processing unit (CPU), at least one communication interface 603, a memory 604, and at least one communication bus 602. The communication bus 602 is used to realize the connection and communication between these components. The communication interface 603 may include a display screen (Display) and a keyboard (Keyboard), and the optional communication interface 603 may also include a standard wired interface and a wireless interface. The memory 604 may be a high-speed volatile random access memory (Random Access Memory, RAM) or a non-volatile memory (non-volatile memory), such as at least one disk storage. The memory 604 may optionally be at least one storage device located away from the aforementioned processor 601. The processor 601 may be combined with Figure 2 In the described device, the memory 604 stores an application program, and the processor 601 calls the program code stored in the memory 604 to execute any of the above method steps.

[0070] The communication bus 602 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The communication bus 602 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0071] Among them, the memory 604 may include a volatile memory (English: volatile memory), such as a random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory 604 may also include a combination of the above types of memory.

[0072] The processor 601 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and a NP.

[0073] The processor 601 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0074] Optionally, the memory 604 is also used to store program instructions. The processor 601 can call the program instructions to implement the present application Figure 1 The line loss locating method in the substation area is shown in the embodiment.

[0075] The embodiment of the present invention further provides a non-transitory computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the processing method of the station area line loss location method in any of the above method embodiments. The storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memory.

[0076] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for locating line loss in a substation area, characterized in that: Applied to a substation management system, the substation management system is connected to the concentrators of multiple substations in communication, each concentrator in the substation is connected to at least one other concentrator in the same substation, each concentrator uploads the connected meter data and synchronizes the meter data with timestamps to other concentrators in communication with it; the method includes: When line loss occurs in any substation, the concentrator sends user identity authentication information encrypted with the substation private key to the user meter side in the substation household-to-substation relationship corresponding to the substation, wherein the user meter side of each substation pre-stores the public key of the corresponding substation; Determine whether the electricity user displayed in the transformer-to-electricity relationship is a real electricity user belonging to the transformer-to-electricity area according to the response information received from the user side; Deleting users who do not belong to the said area from the line loss calculation process of the said area and correcting the user-to-user relationship of the said area according to the response result; When the corrected area line loss is still higher than the preset line loss threshold, the power consumption data of each user participating in the line loss calculation in the area is compared with the historical power consumption data of the user in the same period; When an abnormality is found in the comparison result, a power consumption data acquisition instruction is sent to other concentrators associated with the target concentrator where the abnormal user is located, so that other associated concentrators send the power consumption data of the same user received during the same period upon receiving the power consumption data acquisition instruction; The power consumption data obtained from the target concentrator is compared with the power consumption data of other associated concentrators for consistency. When the consistency comparison result meets the requirements, the location information of the target concentrator is sent to the verification terminal.

2. The method according to claim 1, characterized in that The substation management system is in communication with the user water meter and gas meter in each substation; before sending the power consumption data acquisition instruction to other concentrators associated with the target concentrator where the abnormal user is located, the method also includes: Obtain water and gas usage data of users with abnormalities in the current period; According to the correlation between the historical normal water consumption data and normal gas consumption data of the abnormal user in the same period and the corresponding historical normal electricity consumption data in the same period, as well as the electricity consumption data, water consumption data and gas consumption data of the abnormal user in the current period, determine whether the user with abnormal comparison results has abnormal electricity consumption; When it is determined that there is an abnormal power usage, the sending operation of responding to the data acquisition instruction is stopped and the location information of the target concentrator where the abnormal user is located is sent to the verification terminal.

3. The method according to claim 1, characterized in that The method further comprises: For any substation, obtain the voltage data of users connected to all concentrators in the substation; Based on the voltage data of users connected to the concentrator, a preset similarity calculation algorithm is used to perform similarity calculation on all concentrators in the substation area; For each concentrator, multiple concentrators whose similarity with the concentrator satisfies a preset similarity threshold are selected, and other concentrators for communication connection with the concentrator are selected from the multiple concentrators according to the shortest communication distance.

4. The method according to claim 3, characterized in that The method further comprises: A monitoring instruction is sent to the concentrator, so that the concentrator receiving the monitoring instruction compares the power consumption data with the power consumption data of other associated concentrators when it is synchronized. When the comparison result does not meet the requirements, an early warning signal is sent to the substation management system.

5. The method according to claim 1, characterized in that: The method further comprises: Obtain a topological diagram of the substation area where line loss occurs; The topological structure diagram is updated according to the corrected substation-household-transformer relationship.

6. The method according to claim 1, characterized in that When line loss occurs in any substation, before sending user identity authentication information encrypted by the substation private key to the user meter side in the substation household-to-substation relationship corresponding to the substation through the concentrator, the method further includes: Obtain power supply line parameters, single-phase electricity user parameters, three-phase electricity user parameters and corresponding theoretical line loss values ​​in different time periods of transformers in multiple substations; The target neural network model is trained according to the power supply line parameters of the transformers in multiple substations, the single-phase electricity user parameters, the three-phase electricity user parameters and the corresponding theoretical line loss values ​​in different time periods to obtain a substation line loss prediction model, which is used to calculate the theoretical line loss value of any substation.

7. The method according to claim 6, characterized in that The method further comprises: Responding to the call operation of the line loss prediction model of the substation area according to the preset interval duration; The theoretical line loss value of the target time length is calculated for each substation in the region by calling the substation line loss prediction model; Calculate the line loss in the same period based on the power supply data and power sales data of each substation in the same period; When the calculated line loss result of any substation in the same period is greater than the corresponding theoretical line loss value, it is determined that line loss occurs in the substation and a positioning operation of the line loss in the substation is responded to.

8. A line loss positioning device for a transformer area, characterized in that: Applied to a substation management system, the substation management system is connected to the concentrators of multiple substations in communication, each concentrator in the substation is connected to at least one other concentrator in the same substation, each concentrator uploads the connected meter data and synchronizes the meter data with timestamps to other concentrators in communication with it; the device includes: The first sending module is used for sending user identity authentication information encrypted with the private key of the substation to the user meter side in the substation-to-substation relationship corresponding to the substation through the concentrator when line loss occurs in any substation, wherein the user meter side of each substation stores the public key of the corresponding substation in advance; A first determination module is used to determine whether the electricity user displayed in the transformer-to-electricity relationship is a real electricity user belonging to the transformer area according to the response information received from the user side; A correction module, used for deleting users not belonging to the substation area from the line loss calculation process of the substation area and correcting the user-to-user relationship of the substation area according to the response result; The first comparison module is used to compare the power consumption data of each user participating in the line loss calculation in the substation with the historical power consumption data of the user in the same period when the corrected substation line loss is still higher than the preset line loss threshold; The second sending module is used to send a power consumption data acquisition instruction to other concentrators associated with the target concentrator where the abnormal user is located when an abnormality occurs in the comparison result, so that the other associated concentrators send the power consumption data of the same user received during the same period upon receiving the power consumption data acquisition instruction; The second comparison module is used to compare the power consumption data obtained from the target concentrator with the power consumption data of other associated concentrators for consistency. When the consistency comparison result meets the requirements, the location information of the target concentrator is sent to the verification terminal.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for locating line loss in a substation area as described in any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for locating line loss in a substation area as described in any one of claims 1-7.

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