Distribution network low-voltage transformer area line loss line determination method and related equipment
By applying binary search and Kirchhoff's current law in low-voltage distribution areas, combined with current measurement equipment, the line loss of a line can be quickly and accurately determined, solving the problem of low efficiency in existing technologies, especially in cases of complex distribution and many branches.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MEIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORP
- Filing Date
- 2026-01-16
- Publication Date
- 2026-05-05
AI Technical Summary
In low-voltage distribution areas, existing technologies rely on manual inspection to determine line loss lines, which is inefficient and makes it difficult to quickly and accurately locate line loss lines in situations with complex distribution, many branches, and numerous users.
By employing the binary search principle and Kirchhoff's current law, combined with current measurement equipment, the target sampling location is obtained through a low-voltage topology map, the current value is measured and the difference is compared, and the line loss is automatically determined.
It improves the efficiency of line loss investigation and can quickly and accurately locate abnormal users or line loss, especially in situations where the distribution of lines in low-voltage distribution areas is complex.
Smart Images
Figure CN121978455A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power monitoring technology, and in particular to a method and related equipment for determining line loss in low-voltage distribution areas of a power distribution network. Background Technology
[0002] As the final link in the power supply chain, the low-voltage distribution area directly faces a wide range of users, and its operation status directly affects the stability and economy of the power supply system.
[0003] Currently, the target line loss lines in low-voltage distribution areas are usually identified through manual inspection, which results in low efficiency. Summary of the Invention
[0004] This application provides a method and related equipment for determining the line loss of low-voltage distribution area lines in a distribution network, so as to more efficiently and accurately determine the target line loss lines in the low-voltage distribution area lines.
[0005] Firstly, this application provides a method for determining the line loss of low-voltage distribution areas in a distribution network, applied to a cloud server. This method includes:
[0006] Based on the low-voltage topology map of the low-voltage distribution area, the target sampling location corresponding to the target line in the low-voltage distribution area is obtained by using the binary search principle.
[0007] Obtain the target current value at the target sampling location, and obtain the sum of the current values of the user meters corresponding to the downstream line of the target sampling location;
[0008] Based on Kirchhoff's current law, determine whether there is line loss in the downstream line according to the target current value and the sum of current values;
[0009] If yes, then the latter part of the line is taken as the target line; otherwise, the former part of the line before the target sampling position is taken as the target line.
[0010] Based on the newly determined target line, jump to the step of obtaining the target sampling position corresponding to the target line in the low-voltage distribution area by using the binary search principle based on the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length.
[0011] Optionally, based on Kirchhoff's current law, determine whether there is line loss in the downstream line according to the target current value and the sum of current values, including: obtaining the difference between the target current value and the sum of current values; based on Kirchhoff's current law, if the difference meets the preset difference range, determine that there is no line loss in the downstream line; if the difference does not meet the preset difference range, determine that there is line loss in the downstream line.
[0012] Optionally, the initial target line starts with the transformer in the low-voltage distribution area and ends with the user's electricity meter at the very end of the target line; if there is line loss in the later section of the line, the starting point of the target line is updated to the target sampling location; if there is no line loss in the later section of the line, the ending point of the target line is updated to the target sampling location.
[0013] Optionally, the low-voltage topology map includes at least the location information of the transformer, the information of different low-voltage lines, and the location information of the user's electricity meter.
[0014] Secondly, this application provides a current measuring device, including: a measuring head device and a handheld device;
[0015] The measuring head device includes a first control unit, a current transformer measuring head electrically connected to the first control unit, and a first display; the handheld device includes a second control unit and a second display electrically connected to the second control unit; the measuring head device is communicatively connected to the handheld device.
[0016] The measuring head device is used to measure the current value of the low-voltage line through the current transformer measuring head in the low-voltage distribution area without interrupting the power supply to the low-voltage line, and to control the first display to show the current value through the first control unit, and to send the current value to the handheld device.
[0017] The handheld device is used to control the second display to show the current value through the second control unit, and to send the current value to the cloud server through the second control unit, so that the cloud server can determine the target line loss line in the low-voltage distribution area of the distribution network according to the method for determining the line loss line in the low-voltage distribution area of the distribution network as described in the first aspect of this application.
[0018] Optionally, the measuring head device also includes a flexible current clamp mounting interface electrically connected to the first control unit, used to connect a flexible current clamp through the flexible current clamp mounting interface when the wire diameter of the low-voltage line is greater than a preset wire diameter threshold, so as to measure the current value of the low-voltage line through the flexible current clamp.
[0019] Optionally, the measuring head device also includes a mounting screw port and a switch button and a measurement mode conversion button, which are electrically connected to the first control unit respectively; the mounting screw port is used to connect the measuring head device and the insulating operating rod, the switch button is used to control the opening or closing of the measuring head device, and the measurement mode conversion button is used to control the current measurement range.
[0020] Thirdly, this application provides a device for determining the line loss of a low-voltage distribution area in a distribution network, applied to a cloud server. The device includes:
[0021] The first acquisition module is used to obtain the target sampling location corresponding to the target line in the low-voltage distribution area based on the low-voltage topology map of the low-voltage distribution area and the principle of binary search.
[0022] The second acquisition module is used to acquire the target current value at the target sampling location, and to acquire the sum of the current values of the user meters corresponding to the downstream line of the target sampling location.
[0023] The determination module is used to determine whether there is line loss in the downstream line based on Kirchhoff's current law, the target current value, and the sum of current values.
[0024] The processing module is used to, if yes, take the subsequent line as the target line, and if no, take the preceding line of the target sampling position as the target line; and, based on the newly determined target line, jump to the step of obtaining the target sampling position corresponding to the target line in the low-voltage distribution area by using the binary search principle according to the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length.
[0025] Optionally, the determination module is specifically used to: obtain the difference between the target current value and the sum of current values; based on Kirchhoff's current law, if the difference meets the preset difference range, then it is determined that there is no line loss in the downstream line; if the difference does not meet the preset difference range, then it is determined that there is line loss in the downstream line.
[0026] Optionally, the initial target line starts with the transformer in the low-voltage distribution area and ends with the user's electricity meter at the very end of the target line; if there is line loss in the later section of the line, the starting point of the target line is updated to the target sampling location; if there is no line loss in the later section of the line, the ending point of the target line is updated to the target sampling location.
[0027] Optionally, the low-voltage topology map includes at least the location information of the transformer, the information of different low-voltage lines, and the location information of the user's electricity meter.
[0028] Fourthly, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;
[0029] The memory stores the instructions that the computer executes;
[0030] The processor executes computer execution instructions stored in memory to implement the method for determining line loss in low-voltage distribution areas as described in the first aspect of this application.
[0031] Fifthly, this application provides a computer-readable storage medium storing computer program instructions, which, when executed, implement the method for determining the line loss of low-voltage distribution areas as described in the first aspect of this application.
[0032] Sixthly, this application provides a computer program product, including a computer program that, when executed, implements the method for determining the line loss of low-voltage distribution areas as described in the first aspect of this application.
[0033] This application provides a method and related equipment for determining line loss lines in low-voltage distribution network areas. Based on the low-voltage topology map of the low-voltage distribution area, a binary search principle is used to obtain the target sampling location corresponding to the target line in the low-voltage distribution area; the target current value at the target sampling location is obtained, as well as the sum of the current values of the user meters corresponding to the downstream line of the target sampling location; based on Kirchhoff's current law, the existence of line loss in the downstream line is determined according to the target current value and the sum of the current values; if so, the downstream line is taken as the target line; otherwise, the upstream line of the target sampling location is taken as the target line; based on the newly determined target line, the process jumps to the step of obtaining the target sampling location corresponding to the target line in the low-voltage distribution area using the binary search principle based on the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length, thus automatically determining the target line loss line. This application can greatly improve the efficiency of line loss line investigation, especially in cases where the low-voltage distribution area has excessively long lines, scattered locations, many line branches, and a large number of users, enabling rapid and accurate location of abnormal users or line loss lines. Attached Figure Description
[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0035] Figure 1 A flowchart illustrating a method for determining line loss in a low-voltage distribution area of a distribution network according to an embodiment of this application;
[0036] Figure 2 A schematic diagram of the target line in the initial state provided in an embodiment of this application;
[0037] Figure 3 This is a schematic diagram of the target sampling location corresponding to the target line provided in one embodiment of this application;
[0038] Figure 4 A schematic diagram of a current measuring device provided in an embodiment of this application;
[0039] Figure 5 A schematic diagram of a current measuring device provided in another embodiment of this application;
[0040] Figure 6 A schematic diagram of the structure of a device for determining line loss in a low-voltage distribution area of a distribution network according to an embodiment of this application;
[0041] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.
[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0044] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.
[0045] As the final link in the power supply chain, low-voltage distribution areas directly serve a large number of users, and their operational status directly affects the stability and economy of the power supply system. With the increasing prevalence of excessively long distribution lines, dispersed locations, numerous line branches, and a large number of users in low-voltage distribution areas, identifying specific lines with significant line losses is quite challenging.
[0046] Currently, the identification of target loss lines in low-voltage distribution areas is typically done manually, resulting in low efficiency. Specifically, on the one hand, checking for line losses requires specialized knowledge and experience; given the large number of branch lines, the limited number of staff makes it difficult to complete a comprehensive and detailed inspection in a short time. Furthermore, the varying levels of professional expertise among staff and their insufficient ability to analyze and handle complex problems also affect the efficiency of identifying loss-prone branches.
[0047] Furthermore, given the large number of line branches, achieving comprehensive line loss monitoring would require deploying a massive amount of monitoring equipment, resulting in high costs and numerous technical challenges. Currently available substation branch monitoring devices are complex to install, requiring pole climbing, and data needs to be uploaded to a cloud server after installation, which is time-consuming (e.g., at least one day).
[0048] In summary, given the excessively long distribution of low-voltage distribution lines, their scattered locations, numerous branch lines, and large number of users, identifying the specific branches with the greatest line loss presents significant challenges.
[0049] To address the aforementioned issues, this application provides a method for determining line loss lines in low-voltage distribution areas. Based on the low-voltage topology map of the low-voltage distribution area, a binary search principle is used to obtain the target sampling location corresponding to the target line within the low-voltage distribution area. Based on Kirchhoff's current law, the target current value at the target sampling location is compared with the sum of the current values of the user's meters corresponding to the subsequent line at the target sampling location, thereby quickly and accurately identifying the target line loss line. This significantly improves the efficiency of line loss line investigation, especially when the low-voltage distribution area has long, dispersed distribution points, numerous branch lines, and a large number of users, enabling rapid and accurate location of abnormal users or line loss lines. The target current value is obtained through current measuring equipment, which can conveniently and accurately obtain the current value of the low-voltage lines in the low-voltage distribution area.
[0050] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0051] Figure 1 A flowchart illustrating a method for determining line loss in low-voltage distribution areas, provided in one embodiment of this application, is applied to a cloud server. For example... Figure 1 As shown in the embodiment of this application, the method for determining the line loss of the low-voltage distribution area in the distribution network includes:
[0052] S101. Based on the low-voltage topology map of the low-voltage distribution area, the target sampling location corresponding to the target line in the low-voltage distribution area is obtained by using the binary search principle.
[0053] In this embodiment, the low-voltage topology map of the distribution network's low-voltage substations is an indispensable tool in power system management, ensuring reliable power supply and efficient power system operation. Optionally, the low-voltage topology map includes at least transformer location information, information on different low-voltage lines, and user meter location information.
[0054] It is understood that a low-voltage topology map includes the layout and connection methods of power lines, switching equipment, protection devices, and other related electrical equipment from transformers to various user terminals. Specifically, a low-voltage topology map includes at least the location information of transformers, information on different low-voltage lines, and the location information of user meters. The low-voltage topology map is a coordinate-based drawing combined with a map, specifically obtained by on-site location of low-voltage distribution areas and their proportional graphical representation.
[0055] In this step, it can be understood that the binary search principle divides the array into two parts, compares the middle element with the target value to determine whether the target value is in the left or right half, and then searches the corresponding half until the target value is found or determined. The binary search principle in this application embodiment is mainly used to determine the target sampling location based on a low-voltage topology map. For example, the target sampling location corresponding to the target line in the low-voltage distribution area can be obtained using the binary search principle based on the low-voltage topology map of the low-voltage distribution area. Specifically, based on the low-voltage topology map of the low-voltage distribution area, the transformer can be set as the starting point of the target line in the low-voltage distribution area, and the last user meter at the end of the target line can be set as the ending point. The midpoint between the coordinates of the starting point and the ending point is determined as the target sampling location.
[0056] S102. Obtain the target current value at the target sampling location, and obtain the sum of the current values of the user meters corresponding to the downstream line of the target sampling location.
[0057] For example, the target current value at the target sampling location can be measured using a current measuring device; specific current measuring devices can be found in subsequent embodiments. The downstream line of the target sampling location can be understood as the line from the target sampling location to the last user meter at the end of the target line; correspondingly, the upstream line of the target sampling location can be understood as the line from the transformer to the target sampling location. Based on the low-voltage topology diagram, the sum of the current values of the user meters corresponding to the downstream line of the target sampling location can be obtained using current related technologies.
[0058] S103. Based on Kirchhoff's current law, determine whether there is line loss in the downstream line according to the target current value and the sum of current values.
[0059] In this step, after obtaining the target current value and the sum of current values, Kirchhoff's Current Law can be used to determine whether there is line loss in the downstream line.
[0060] Further, optionally, based on Kirchhoff's current law, determining whether there is line loss in the downstream line according to the target current value and the sum of current values may include: obtaining the difference between the target current value and the sum of current values; based on Kirchhoff's current law, if the difference meets the preset difference range, then it is determined that there is no line loss in the downstream line; if the difference does not meet the preset difference range, then it is determined that there is line loss in the downstream line.
[0061] For example, if the preset difference range is ±0.5 amperes (A), the target current value and the sum of current values can be compared to obtain the difference between them. Based on Kirchhoff's current law, if the difference meets the preset difference range, it is determined that there is no line loss in the subsequent line, i.e., the subsequent line is normal. If the difference does not meet the preset difference range, it is determined that there is line loss in the subsequent line, i.e., the subsequent line is abnormal.
[0062] S104. If yes, then the latter part of the line is taken as the target line; otherwise, the former part of the line at the target sampling position is taken as the target line.
[0063] In this step, if it is determined that there is line loss in the subsequent section of the line, the subsequent section of the line can be used as the target line to further determine the target line loss line within the subsequent section of the line. If it is determined that there is no line loss in the subsequent section of the line, the section of the line preceding the target sampling location can be used as the target line to further determine the target line loss line within the preceding section of the line.
[0064] S105. Based on the newly determined target line, jump to the step of obtaining the target sampling position corresponding to the target line in the low-voltage distribution area by using the binary search principle based on the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length.
[0065] For example, if it is determined that there is line loss in the downstream line, the downstream line can be used as the target line, and the target sampling position corresponding to the downstream line can be determined. That is, steps S101 to S105 are repeated to obtain the target line loss line. If it is determined that there is no line loss in the downstream line, the upstream line at the target sampling position can be used as the target line, and the target sampling position corresponding to the upstream line can be determined. That is, steps S101 to S105 are repeated to obtain the target line loss line. In this way, the range of line loss lines is gradually narrowed until a target line loss line with line loss and a length that meets the preset length is obtained. The preset length can be set as needed, and this application embodiment does not limit it. When both the upstream and downstream lines have line loss, the target line loss line in the downstream line can be determined first by executing steps S101 to S105. After line loss processing is performed on the target line loss line in the downstream line, the target line loss line in the upstream line can be determined by executing steps S101 to S105 again, and then line loss processing is performed on the target line loss line in the upstream line.
[0066] Optionally, the initial target line starts with the transformer in the low-voltage distribution area and ends with the user's electricity meter at the very end of the target line; if there is line loss in the later section of the line, the starting point of the target line is updated to the target sampling location; if there is no line loss in the later section of the line, the ending point of the target line is updated to the target sampling location.
[0067] For example, Figure 2 This is a schematic diagram of the target line in its initial state according to an embodiment of this application. Figure 2 As shown, the 10 kV transformer in the low-voltage distribution area is set as the starting point of the target line in the low-voltage distribution area, and the last user meter at the end of the target line is set as the ending point. Based on the coordinates of the starting point and the ending point, the midpoint between the two coordinates is determined as the target sampling location. Assume there are abnormal locations with line loss, such as... Figure 2 As shown, the target sampling location corresponding to the target line in the low-voltage distribution area can be obtained by using the binary search principle based on the low-voltage topology map of the low-voltage distribution area. Figure 3 This is a schematic diagram of the target sampling location corresponding to the target line provided in one embodiment of this application. For example... Figure 3 As shown, based on Figure 2 Based on the low-voltage topology map of the low-voltage distribution area, the target sampling location was obtained using the binary search principle, as shown below. Figure 3 As shown, the target current value at the target sampling location can then be compared with the sum of the current values of the user's meter corresponding to the downstream line at the target sampling location. If the difference between the two does not meet the preset difference range, it is determined that there is line loss in the downstream line, that is, there is an anomaly in the downstream line (e.g., Figure 3(As shown in the abnormal location), update the starting point of the target line to the target sampling position. For the section of the line after the target sampling position, repeat steps S101 to S105 to obtain the target line loss line. If the difference between the two meets the preset difference range, it is determined that there is no line loss in the subsequent section of the line, that is, the subsequent section of the line is not abnormal. Update the ending point of the target line to the target sampling position. For the section of the line before the target sampling position, repeat steps S101 to S105 to obtain the target line loss line. Through the above iterative processing, abnormal users or line loss lines can be quickly located.
[0068] The method for determining line loss lines in low-voltage distribution areas provided in this application embodiment involves: obtaining the target sampling location corresponding to the target line in the low-voltage distribution area using a binary search principle based on the low-voltage topology map of the low-voltage distribution area; obtaining the target current value at the target sampling location and the sum of the current values of the user meters corresponding to the downstream line of the target sampling location; determining whether there is line loss in the downstream line based on Kirchhoff's current law and the target current value and the sum of the current values; if so, taking the downstream line as the target line; if not, taking the upstream line of the target sampling location as the target line; and, based on the newly determined target line, jumping back to the step of obtaining the target sampling location corresponding to the target line in the low-voltage distribution area using a binary search principle based on the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length, thus achieving automatic determination of the target line loss line. This application embodiment can greatly improve the efficiency of line loss line investigation, especially when the low-voltage distribution area has long lines, scattered locations, many line branches, and a large number of users, enabling rapid and accurate location of abnormal users or line loss lines.
[0069] Figure 4 This is a schematic diagram of a current measuring device provided in one embodiment of this application. Figure 4 As shown, the current measuring device 400 of this application embodiment includes: a measuring head device 410 and a handheld device 420. The measuring head device 410 includes a first control unit 411, a current transformer measuring head 412 and a first display 413 electrically connected to the first control unit 411; the handheld device 420 includes a second control unit 421 and a second display 422 electrically connected to the second control unit 421; the measuring head device 410 and the handheld device 420 are communicatively connected.
[0070] The measuring head device 410 is used to measure the current value of the low-voltage line through the current transformer measuring head 412 when the low-voltage line in the low-voltage distribution area is not powered off, and to control the first display 413 to display the current value through the first control unit 411, and to send the current value to the handheld device 420.
[0071] The handheld device 420 is used to control the second display 422 to display the current value through the second control unit 421, and to send the current value to the cloud server through the second control unit 421, so that the cloud server can determine the target line loss line in the low-voltage distribution area according to the method for determining the line loss line in the low-voltage distribution area of the distribution network in any of the above embodiments.
[0072] In this embodiment, for example, the current transformer measuring head 412 is a U-shaped open-type current transformer measuring head 412, made using the principle of a current transformer, and can measure line current. Specifically, by bringing the current transformer measuring head 412 close to the conductor of the line and gently pushing the conductor, the conductor can be passed into the current transformer measuring head 412; by gently pulling the conductor, the conductor can be removed from the current transformer measuring head 412. The first display 413 is used to display the current value measured by the current transformer measuring head 412. The measuring head device 410 and the handheld device 420 are connected via, for example, a fourth-generation mobile communication technology (4G) network. When the low-voltage line in the low-voltage distribution area is not powered off, the measuring head device 410 measures the current value of the low-voltage line through the current transformer measuring head 412, and controls the first display 413 to display the current value through the first control unit 411, and also sends the current value to the handheld device 420 through the 4G network. Accordingly, the handheld device 420 receives the current value sent by the measuring head device 410, controls the second display 422 to display the current value through the second control unit 421, and sends the current value to the cloud server through the second control unit 421. This allows the cloud server to determine the target line loss line in the low-voltage distribution area based on the current value, using the method for determining line loss lines in the low-voltage distribution area as described in any of the above embodiments. For details on how the cloud server determines the target line loss line in the low-voltage distribution area based on the current value, please refer to the above embodiments.
[0073] The current measuring device provided in this application includes a measuring head device and a handheld device. The measuring head device includes a first control unit, a current transformer measuring head electrically connected to the first control unit, and a first display. The handheld device includes a second control unit and a second display electrically connected to the second control unit. The measuring head device and the handheld device are communicatively connected. When the low-voltage lines in the low-voltage distribution area are not de-energized, the measuring head device measures the current value of the low-voltage lines using the current transformer measuring head, and controls the first display to show the current value and sends the current value to the handheld device via the first control unit. The handheld device controls the second display to show the current value via the second control unit, and sends the current value to a cloud server via the second control unit. This allows the cloud server to determine the target line loss line in the low-voltage distribution area according to the method for determining line loss lines in any of the above embodiments. Through the cooperation of the measuring head device and the handheld device, the current value of the low-voltage lines in the low-voltage distribution area can be accurately obtained, thereby helping the cloud server to accurately determine the target line loss line in the low-voltage distribution area based on the current value.
[0074] Based on the above embodiments, Figure 5 This is a schematic diagram of a current measuring device provided in another embodiment of this application. Figure 5 As shown, the current measuring device of this application embodiment includes a measuring head device 410 and a handheld device 420. The measuring head device 410 includes a first control unit (… Figure 5 (not shown in the image) and a current transformer measuring head 412 and a first display 413, which are electrically connected to the first control unit respectively; the handheld device 420 includes a second control unit ( Figure 5 (not shown in the image) and with the second control unit ( Figure 5 A second display 422 (not shown) is electrically connected to a handheld device 420; the measuring head device 410 is communicatively connected to the handheld device 420. The measuring head device 410 may also include a first control unit (…). Figure 5 The flexible current clamp mounting interface 414 (not shown) is used to connect a flexible current clamp when the wire diameter of the low-voltage line is larger than a preset wire diameter threshold, so as to measure the current value of the low-voltage line through the flexible current clamp mounting interface 414. It can be understood that if the wire diameter to be measured is too large to fit inside the current transformer measuring head 412, a flexible current clamp can be connected to the measuring head device 410 through the flexible current clamp mounting interface, thereby allowing the current value of the low-voltage line to be measured through the flexible current clamp.
[0075] like Figure 5As shown, the measuring head device 410 may further include a mounting screw port 415 and a switch button 416 and a measurement mode conversion button 417, both electrically connected to the first control unit. The mounting screw port 415 is used to connect the measuring head device 410 and the insulating operating rod. The switch button 416 is used to control the opening or closing of the measuring head device 410, and the measurement mode conversion button 417 is used to control the current measurement range. The insulating operating rod is made of insulating material, has an extendable length, and serves to facilitate measurement and provide insulation protection.
[0076] The handheld device 420 in the current measuring device may further include an antenna 423 and multiple function buttons 424; the antenna 423 is used to enhance communication signals, and the multiple function buttons 424 include at least a button for controlling the handheld device to turn on or off, a setting button for the display interface of the second display, and a button for controlling the start or end of meter reading. This application embodiment does not limit the number of function buttons.
[0077] The current measuring device provided in this application embodiment includes a measuring head device that further comprises a flexible current clamp mounting interface electrically connected to a first control unit. This facilitates the connection of a flexible current clamp through the flexible current clamp mounting interface when the wire diameter of the low-voltage line is greater than a preset wire diameter threshold, so as to measure the current value of the low-voltage line through the flexible current clamp. The measuring head device also includes a mounting screw port and a switch button and a measurement mode conversion button, both electrically connected to the first control unit. The mounting screw port is used to connect the measuring head device and the insulating operating rod, the switch button is used to control the opening or closing of the measuring head device, and the measurement mode conversion button is used to control the current measurement range. The current measuring device provided in this application embodiment can conveniently and accurately obtain the current value of low-voltage lines in the low-voltage distribution network.
[0078] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.
[0079] Figure 6 This is a schematic diagram of a device for determining line loss in a low-voltage distribution area, provided in one embodiment of this application, and applied to a cloud server. For example... Figure 6 As shown, the distribution network low-voltage transformer area line loss determination device 600 of this application embodiment includes: a first acquisition module 601, a second acquisition module 602, a determination module 603, and a processing module 604. Wherein:
[0080] The first acquisition module 601 is used to obtain the target sampling position corresponding to the target line in the low-voltage distribution area based on the low-voltage topology map of the low-voltage distribution area and the principle of binary search.
[0081] The second acquisition module 602 is used to acquire the target current value at the target sampling location and the sum of the current values of the user meters corresponding to the downstream line of the target sampling location.
[0082] The determination module 603 is used to determine whether there is line loss in the downstream line based on Kirchhoff's current law, the target current value, and the sum of current values.
[0083] The processing module 604 is used to, if yes, take the subsequent line as the target line, and if no, take the preceding line of the target sampling position as the target line; and according to the re-determined target line, jump to the step of obtaining the target sampling position corresponding to the target line in the low-voltage distribution area by using the binary search principle based on the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length.
[0084] In some embodiments, the determining module 603 may be specifically used to: obtain the difference between the target current value and the sum of current values; based on Kirchhoff's current law, if the difference meets the preset difference range, then determine that there is no line loss in the downstream line; if the difference does not meet the preset difference range, then determine that there is line loss in the downstream line.
[0085] Optionally, the initial target line starts with the transformer in the low-voltage distribution area and ends with the user's electricity meter at the very end of the target line; if there is line loss in the later section of the line, the starting point of the target line is updated to the target sampling location; if there is no line loss in the later section of the line, the ending point of the target line is updated to the target sampling location.
[0086] Optionally, the low-voltage topology map includes at least the location information of the transformer, the information of different low-voltage lines, and the location information of the user's electricity meter.
[0087] The apparatus of this application embodiment can be used to execute the scheme of determining the line loss of the low-voltage distribution area in the distribution network in any of the above-described method embodiments. Its implementation principle and technical effect are similar, and will not be repeated here.
[0088] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 7 As shown, the electronic device 700 may include at least one processor 701 and a memory 702.
[0089] The memory 702 is used to store programs. Specifically, the program may include program code, which includes computer-executable instructions.
[0090] The memory 702 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device.
[0091] The processor 701 executes computer execution instructions stored in the memory 702 to implement the method for determining the line loss of low-voltage distribution areas in the distribution network as described in the foregoing method embodiments. The processor 701 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application. Specifically, when implementing the method for determining the line loss of low-voltage distribution areas in the distribution network as described in the foregoing method embodiments, the electronic device may be, for example, a cloud server or other electronic device with processing capabilities.
[0092] Optionally, the electronic device 700 may also include a communication interface 703. In specific implementations, if the communication interface 703, memory 702, and processor 701 are implemented independently, they can be interconnected via a bus to complete communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc., but this does not imply that there is only one bus or one type of bus.
[0093] Optionally, in a specific implementation, if the communication interface 703, memory 702, and processor 701 are integrated on a single chip, then the communication interface 703, memory 702, and processor 701 can communicate through an internal interface.
[0094] This application also provides a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the above-mentioned method for determining line loss in low-voltage distribution areas.
[0095] This application also provides a computer program product, including a computer program that, when executed, implements the above-described method for determining line loss in low-voltage distribution areas.
[0096] The aforementioned computer-readable storage media can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.
[0097] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in a device for determining line loss in low-voltage distribution areas.
[0098] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.
[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A method for determining the line loss of a low-voltage distribution area in a distribution network, characterized in that, Applied to cloud servers, the determination method includes: Based on the low-voltage topology map of the low-voltage distribution area, the target sampling location corresponding to the target line in the low-voltage distribution area is obtained by using the binary search principle. Obtain the target current value at the target sampling location, and obtain the sum of the current values of the user meters corresponding to the downstream line of the target sampling location; Based on Kirchhoff's current law, the presence of line loss in the downstream line is determined according to the target current value and the sum of the current values. If yes, then the latter part of the line is taken as the target line; otherwise, the former part of the line at the target sampling position is taken as the target line. Based on the newly determined target line, jump to the step of obtaining the target sampling position corresponding to the target line in the low-voltage distribution area by using the binary search principle based on the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained. The target line loss line is a line with line loss and a length that meets the preset length.
2. The determination method according to claim 1, characterized in that, The determination of whether there is line loss in the downstream line based on Kirchhoff's current law, according to the target current value and the sum of the current values, includes: Obtain the difference between the target current value and the sum of the current values; Based on Kirchhoff's current law, if the difference meets the preset difference range, it is determined that there is no line loss in the downstream line; if the difference does not meet the preset difference range, it is determined that there is line loss in the downstream line.
3. The determination method according to claim 1, characterized in that, The initial target line starts from the transformer in the low-voltage distribution area and ends at the user's electricity meter at the very end of the target line. If there is line loss in the latter part of the line, the starting point of the target line is updated to the target sampling position; If there is no line loss in the latter part of the line, the endpoint of the target line is updated to the target sampling position.
4. The determining method according to any one of claims 1 to 3, characterized in that, The low-voltage topology map includes at least the location information of the transformer, the information of different low-voltage lines, and the location information of the user's electricity meter.
5. A current measuring device, characterized in that, include: Measuring head devices and handheld consoles; The measuring head device includes a first control unit, a current transformer measuring head electrically connected to the first control unit, and a first display; the handheld device includes a second control unit and a second display electrically connected to the second control unit; the measuring head device is communicatively connected to the handheld device. The measuring head device is used to measure the current value of the low-voltage line through the current transformer measuring head when the low-voltage line in the distribution network is not powered off, and to control the first display to display the current value through the first control unit, and to send the current value to the handheld device. The handheld device is used to control the second display to display the current value through the second control unit, and to send the current value to the cloud server through the second control unit, so that the cloud server can determine the target line loss line in the low-voltage distribution area according to the method for determining the line loss line in the low-voltage distribution area according to any one of claims 1 to 4.
6. The current measuring device according to claim 5, characterized in that, The measuring head device also includes a flexible current clamp mounting interface electrically connected to the first control unit, used to connect a flexible current clamp through the flexible current clamp mounting interface when the wire diameter of the low-voltage line is greater than a preset wire diameter threshold, so as to measure the current value of the low-voltage line through the flexible current clamp.
7. The current measuring device according to claim 5 or 6, characterized in that, The measuring head device also includes a mounting screw port and a switch button and a measurement mode conversion button that are electrically connected to the first control unit respectively; the mounting screw port is used to connect the measuring head device and the insulating operating rod, the switch button is used to control the opening or closing of the measuring head device, and the measurement mode conversion button is used to control the current measurement range.
8. A device for determining line loss in low-voltage distribution areas of a power distribution network, characterized in that, Applied to a cloud server, the determining device includes: The first acquisition module is used to obtain the target sampling position corresponding to the target line in the low-voltage distribution area based on the low-voltage topology map of the low-voltage distribution area and the principle of binary search. The second acquisition module is used to acquire the target current value at the target sampling location, and to acquire the sum of the current values of the user meters corresponding to the downstream line of the target sampling location; The determination module is used to determine whether there is line loss in the downstream line based on Kirchhoff's current law, according to the target current value and the sum of the current values; The processing module is configured to, if yes, take the downstream line as the target line, and if no, take the upstream line of the target sampling position as the target line; and, based on the newly determined target line, jump to the step of obtaining the target sampling position corresponding to the target line in the low-voltage distribution area by using the binary search principle according to the low-voltage topology map of the low-voltage distribution area, until the target line loss line is obtained, wherein the target line loss line is a line with line loss and a length that meets the preset length.
9. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes the computer execution instructions stored in the memory to implement the method for determining the line loss of the low-voltage distribution area as described in any one of claims 1 to 4.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed, implement the method for determining the line loss of low-voltage distribution area as described in any one of claims 1 to 4.
11. A computer program product, comprising a computer program, characterized in that, When the computer program is executed, it implements the method for determining the line loss of the low-voltage distribution area as described in any one of claims 1 to 4.