Distribution transformer load three-phase imbalance management and control method, system and equipment and medium

Abstract

The invention provides a distribution transformer load three-phase imbalance management and control method, system and device and a medium, and belongs to the technical field of low-voltage equipment monitoring, and the method comprises the steps: obtaining the three-phase current data of a distribution transformer in real time; calculating a single-phase load rate and a three-phase unbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer; generating a three-phase imbalance early warning short message and a heavy load supervision short message according to a calculation result; the heavy load condition is displayed through the data map, and the operation and maintenance management and control level of the power distribution equipment is improved.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage equipment monitoring technology, and particularly relates to a method, system, equipment and medium for controlling three-phase imbalance of distribution transformer load. Background Technology

[0002] With the rapid development of power systems, the number of distribution transformer substations has increased dramatically, especially in urban areas where the number of low-voltage substations is vast and their distribution is widespread. This places higher demands on the operation, maintenance, and management of power distribution equipment. The field of low-voltage equipment monitoring technology needs efficient and real-time methods to ensure the healthy operation of equipment and prevent failures caused by load imbalances.

[0003] In existing technologies, load conditions are assessed through manual analysis or basic calculations. For example, maintenance personnel periodically acquire data and attempt to balance the three-phase current and alleviate overload problems by simply calculating the load rate and manually adjusting the load phases. However, due to data acquisition delays, the distribution transformer load rate cannot be monitored in real time, seriously threatening the healthy operation of the equipment.

[0004] To provide timely early warning of three-phase imbalance in distribution transformer load and effectively prevent distribution transformer overload problems, this invention provides a method for controlling three-phase imbalance in distribution transformer load. Summary of the Invention

[0005] This invention provides a method, system, device, and medium for controlling three-phase imbalance of distribution transformer load, in order to solve at least one of the above-mentioned problems.

[0006] In a first aspect, embodiments of this application provide a method for controlling three-phase imbalance of a distribution transformer load, the method comprising: Real-time acquisition of three-phase current data from distribution transformers; Calculate the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer. Based on the calculation results, generate three-phase imbalance early warning SMS and overload supervision SMS; The heavy load situation is displayed through a data map.

[0007] Furthermore, the single-phase load factor of the distribution transformer is calculated based on the three-phase current data, specifically including: Obtain the rated capacity of the transformer substation, and calculate the rated current based on the rated capacity. The expression is as follows:

[0008] The expression for calculating the actual current is:

[0009] in, This indicates the rated current value, in amperes (A). This represents the maximum value of the phase current, expressed in amperes (A). This indicates the rated capacity of the transformer substation, in kVA. Indicates CT ratio; The expression for calculating the single-phase load factor of a distribution transformer based on rated current and actual current is as follows:

[0010] This represents the single-phase load factor of the distribution transformer, in percentages (%).

[0011] Furthermore, the three-phase imbalance rate is calculated based on the three-phase current data of the distribution transformer, specifically including: The expressions for calculating the maximum, minimum, and maximum absolute values ​​of the three-phase electricity (A, B, and C) are as follows:

[0012]

[0013]

[0014] The load direction is determined by the sum of the maximum and minimum values, and its expression is as follows:

[0015] if This indicates that the algebraic sum of the three-phase currents is non-negative and the load is positive. if , indicating that the algebraic sum is negative and the load is reversed; The three-phase unbalance rate is calculated based on the maximum value, minimum value, maximum absolute value, and load direction. The expression is as follows:

[0016] Where Δ represents the three-phase imbalance rate.

[0017] Furthermore, before calculating the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data, data preprocessing is also included, specifically: The values ​​of phases A, B, and C are obtained from the collected three-phase current data of the distribution transformer, and anomalies are checked. If any of the three phase values ​​(A, B, and C) are missing, the result is set to 0.0 for all three phases, and the data is discarded.

[0018] Furthermore, based on the calculation results, a three-phase imbalance warning SMS message is generated, specifically including: When the calculation results show the single-phase load rate of the distribution transformer 60% and three-phase imbalance rate When the three-phase imbalance reaches 25%, an early warning SMS message will be automatically generated. The three-phase imbalance early warning SMS includes the single-phase load rate of the distribution transformer, the three-phase imbalance rate, the load direction, and a suggested phase shifting and load transfer. The three-phase imbalance early warning text messages were sent to the mobile phones of the power supply station director and the substation manager, respectively.

[0019] Furthermore, based on the calculation results, a reloaded supervisory SMS message is generated, specifically including: When the calculation results show the single-phase load rate of the distribution transformer At 80%, automatically generate a heavy-load supervision SMS message; The heavy load supervision SMS includes the single-phase load rate of the distribution transformer, the three-phase imbalance rate, the cumulative duration of heavy load on the day, the load direction, the suggested phase adjustment to transfer the load, and the lightly unloaded distribution transformer within 500 meters. The heavy-load supervision SMS messages were sent to the mobile phones of the person in charge of the operation and maintenance department, the person in charge of the equipment management unit, the director of the power supply station, and the area manager.

[0020] Furthermore, the overload situation is displayed through a data map, specifically including: Plot the latitude and longitude coordinates of the urban area on a map; For each area, the heavy load duration of the distribution transformer is determined separately; Based on the duration of heavy load, the transformers are displayed in a color scheme of red, orange, yellow, green, cyan, and blue, with blue representing transformers with light loads and red representing transformers with heavy loads.

[0021] Secondly, embodiments of this application also provide a system applied to the three-phase imbalance control method for distribution transformer loads as described in the above aspects, the system comprising: The data acquisition module is used to acquire the three-phase current data of the distribution transformer in real time. The calculation module calculates the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer. The early warning module generates three-phase imbalance early warning SMS and overload supervision SMS based on the calculation results; The visualization module displays the overload situation through a data map.

[0022] Thirdly, an electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the three-phase imbalance control method for distribution transformer load as described in the preceding aspects.

[0023] Fourthly, a storage medium storing a computer program that, when executed by a processor, implements the steps of the three-phase imbalance control method for distribution transformer loads as described in the preceding aspects.

[0024] As can be seen from the above technical solutions, the present invention has the following advantages: The three-phase imbalance control method for distribution transformer load provided in this application solves the problem of data acquisition delay in the prior art by acquiring the three-phase current data of the distribution transformer in real time, realizes continuous monitoring of the distribution transformer load, can capture abnormal situations in a timely manner, and improves monitoring efficiency.

[0025] This application solves the problem of non-real-time calculation by calculating the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer, and realizes accurate load assessment, providing a data foundation for early warning and supervision.

[0026] This application solves the problem of the early warning mechanism relying on manual intervention by generating three-phase imbalance early warning SMS and overload supervision SMS based on the calculation results, realizing automated proactive operation and inspection, and ensuring that problems are quickly notified to relevant personnel.

[0027] This application solves the problem of lack of visualization by displaying heavy load conditions through data maps, realizing intuitive heavy load monitoring and supporting distribution network investment and lean operation and maintenance decisions. Attached Figure Description

[0028] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of a method for controlling three-phase imbalance of distribution transformer load according to the present invention. Detailed Implementation

[0030] To make the purpose, features, and advantages of this application more apparent and understandable, specific embodiments and accompanying drawings will be used to clearly and completely describe the technical solution protected by this application. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this patent.

[0031] This application provides a method, system, device, and medium for controlling three-phase imbalance of distribution transformer load, which solves the current urgent technical problem of realizing timely early warning of three-phase imbalance of distribution transformer load and effectively preventing distribution transformer overload.

[0032] The technical solutions proposed in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] Figure 1 A flowchart illustrating a method for controlling three-phase imbalance of a distribution transformer load, provided in an embodiment of this application. Figure 1 As shown in the embodiment of this application, a method for controlling three-phase imbalance of distribution transformer load is provided, the method comprising: Real-time acquisition of three-phase current data from distribution transformers; acquisition of three-phase current data from a new generation data acquisition system via intelligent fusion terminal and RPA technology. This application uses a new generation data acquisition system to collect daily three-phase current data of public transformer equipment in the distribution area. The acquisition cycle is 24 hours, and data acquisition is automatic through intelligent fusion terminal and RPA technology. The data format includes A, B, and C three-phase current values, in amperes (A).

[0034] The instantaneous current values ​​(unit: A) of phases A, B, and C are obtained from the intelligent fusion terminal, with a sampling period of T. For each time point e, the value is: A=list_data[0][e],B=list_data[1][e],C=list_data[2][e].

[0035] Calculate the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer. Based on the calculation results, generate three-phase imbalance early warning SMS and overload supervision SMS; The heavy load situation is displayed through a data map.

[0036] The calculation of the single-phase load factor of the distribution transformer based on the three-phase current data of the distribution transformer specifically includes: Obtain the rated capacity of the transformer substation, and calculate the rated current based on the rated capacity. The expression is as follows:

[0037] The expression for calculating the actual current is:

[0038] in, This indicates the rated current value, in amperes (A). This represents the maximum value of the phase current, expressed in amperes (A). This indicates the rated capacity of the transformer substation, in kVA. Indicates CT ratio; The expression for calculating the single-phase load factor of a distribution transformer based on rated current and actual current is as follows:

[0039] This represents the single-phase load factor of the distribution transformer, in percentages (%).

[0040] The three-phase unbalance rate is calculated based on the three-phase current data of the distribution transformer, specifically including: The expressions for calculating the maximum, minimum, and maximum absolute values ​​of the three-phase electricity (A, B, and C) are as follows:

[0041]

[0042]

[0043] The load direction is determined by the sum of the maximum and minimum values, and its expression is as follows:

[0044] if This indicates that the algebraic sum of the three-phase currents is non-negative and the load is positive. if , indicating that the algebraic sum is negative and the load is reversed; Under normal operating conditions, the three-phase current is mainly consumed by the load, and its algebraic sum is usually non-negative. When the distributed generation exceeds the local load, the current reverses, causing the algebraic sum to become negative. This method is simple and efficient, with an error rate of less than 5%, and is suitable for real-time monitoring.

[0045] Simultaneously determine the S value when calculating the three-phase imbalance rate: if If so, then mark "reverse load" in the warning information.

[0046] Example: Suppose at a certain moment A=-50A (reverse), B=60A, C=55A, then max=60A, min=-50A, max+min=10≥0, so S=100, which is a positive load; but if A=-60A, B=50A, C=55A, then max+min=-10<0, S=-100, which is marked as a reverse load.

[0047] This judgment result is directly used to generate a three-phase imbalance warning SMS.

[0048] The three-phase unbalance rate is calculated based on the maximum value, minimum value, maximum absolute value, and load direction. The expression is as follows:

[0049] Where Δ represents the three-phase imbalance rate.

[0050] Before calculating the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data, data preprocessing is also included, specifically: The values ​​of phases A, B, and C are obtained from the collected three-phase current data of the distribution transformer, and anomalies are checked. If any of the three phase values ​​(A, B, and C) are missing, the result is set to 0.0 for all three phases, and the data is discarded.

[0051] Based on the calculation results, a three-phase imbalance warning SMS message is generated, specifically including: When the calculation results show the single-phase load rate of the distribution transformer When the three-phase imbalance rate is ≥25% and 60%, a three-phase imbalance warning SMS will be automatically generated. The three-phase imbalance early warning SMS includes the transformer's single-phase load rate, three-phase imbalance rate, load direction, and a suggested phase-shifting load transfer. The phase-shifting load transfer suggestion aims to balance the three-phase current and avoid overload by adjusting the load distribution (e.g., transferring users from high-load phases to low-load phases). The suggestion is generated based on current data analysis, topology relationships, and historical rules. The specific steps are as follows: Step 1: Data Analysis and Comparison Step 101: Identify the unbalanced phase: First, calculate the single-phase load rate and three-phase unbalance rate of the transformer. If the single-phase load rate of the transformer is ≥60% and the three-phase unbalance rate is ≥25%, mark it as a "high load phase".

[0052] Step 102: Lightly Loaded Transformer Search: Access the Geographic Information System (GIS), using the current transformer as the center, search for other transformers within 500 meters, and filter out "lightly loaded transformers" (defined as transformers with a load rate ≤ 30% for 48 hours). The lightly loaded list is updated based on real-time data to ensure feasibility.

[0053] Step 103: Load Transfer Logic: Recommended rules include: Prioritize transferring single-phase users in high-load phases to low-load phases on the same transformer (e.g., when phase A is overloaded, transfer users in phase A to phase B or C).

[0054] If the load cannot be balanced by the same transformer, the load will be transferred to a nearby lightly loaded transformer (based on distance and capacity matching).

[0055] Consider user type: prioritize adjusting interruptible loads (such as residential electricity) to avoid affecting critical loads.

[0056] Step 2: Suggested generation algorithm: Step 201: Rule Engine: The system's built-in rule base, for example: If phase A has a high load and phase B has a load rate of less than 50%, it is recommended to "move some users from phase A to phase B".

[0057] If all three phases are under high load, but the nearby transformer is under light load, it is recommended to "transfer the load to a lightly loaded transformer X within 500 meters" (X is automatically labeled by GIS).

[0058] Step 202: Historical data reference: Analyze the phase adjustment records of the past 30 days and prioritize the scheme with a high success rate (such as a phase adjustment operation that has reduced the imbalance rate by more than 20%).

[0059] Step 203: Automated generation: Fill key parameters with text templates, for example, output the following in the warning text message: "Maximum load rate 85%, three-phase imbalance rate 30%, it is recommended to adjust the load of phase A to phase C (current phase C load rate 40%); or transfer to light-load distribution transformer Y (distance 300 meters)."

[0060] The three-phase imbalance early warning SMS messages were sent to the mobile phones of the power supply station manager and the substation manager. The equipment management unit was instructed to handle the situation promptly to avoid overload problems.

[0061] Based on the calculation results, a reloaded supervisory SMS message is generated, specifically including: When the calculation results show the single-phase load rate of the distribution transformer At 80%, automatically generate a heavy-load supervision SMS message; The heavy load supervision SMS includes the single-phase load rate of the distribution transformer, the three-phase imbalance rate, the cumulative duration of heavy load on the day, the load direction, the suggested phase adjustment to transfer the load, and the lightly unloaded distribution transformer within 500 meters. The aforementioned overload supervision SMS messages were sent to the mobile phones of the responsible personnel in the Operation and Maintenance Department, the responsible personnel in the Equipment Management Unit, the power supply station director, and the area manager. The Equipment Management Unit was instructed to handle the situation as soon as possible.

[0062] In the three-phase imbalance early warning system for distribution transformers, the cumulative heavy load duration and the number of lightly unloaded distribution transformers within 500 meters are key fields in the heavy load supervision SMS messages, used to accurately assess the overload risk of distribution transformers and provide mitigation suggestions. Through real-time data monitoring, Geographic Information System (GIS) integration, and rule engines, automated calculations and decision support are achieved, ensuring operational and maintenance efficiency.

[0063] It should be noted that the cumulative overload duration for the day refers to the total time within a 24-hour period during which the single-phase load rate of the distribution transformer continuously exceeds the overload threshold (≥80%). This indicator is used to quantify the severity of distribution transformer overload and help operation and maintenance personnel prioritize the handling of high-risk equipment. The statistics are calculated based on real-time load rates, and the specific steps are as follows: According to load factor classification, heavy load is defined as a load factor ≥ 80%. The formula for calculating the single-phase load factor of a distribution transformer is:

[0064] "Day" refers to the system cycle from 00:00 to 23:59 each day, and statistics are based on natural days.

[0065] The intelligent fusion terminal collects three-phase current data every 5 minutes and calculates the load rate of each phase. For example, for time point t, the current values ​​of phases A, B, and C are collected, the load rate is calculated, and the maximum value is taken as the load rate at that moment.

[0066] For each sampling point, if the load rate is ≥80%, then that moment is marked as "overload state".

[0067] Summarize all sampling points marked as "overloaded" for the day and calculate the cumulative time. For example, if the sampling interval is 5 minutes, then each overloaded sampling point contributes 5 minutes of time. The cumulative formula is: Cumulative overload duration = Number of overload sampling points × Sampling interval If data is interrupted or invalid, the system skips that period to ensure statistical accuracy. Cumulative results are reset to zero daily and restart.

[0068] Assume that a certain distribution transformer has a load rate ≥ 80% during the following periods on the day: 10:00-10:30 (30 minutes) 14:00-15:00 (60 minutes) From 18:00 to 18:15 (15 minutes), the cumulative overload time is 30 + 60 + 15 = 105 minutes. The system marks "Today's cumulative time: 105 minutes" in the overload supervision SMS to help personnel assess the urgency (the longer the duration, the higher the risk).

[0069] The cumulative overload duration is directly used to trigger the supervision rules: if the duration exceeds the threshold (e.g., 60 minutes), the system will upgrade the warning level. This statistic supports the automated generation of "overload supervision" to ensure timely intervention.

[0070] It should be further clarified that "lightly loaded or unloaded distribution transformers within 500 meters" refers to other distribution transformers within 500 meters of the currently heavily loaded distribution transformer that are in a lightly loaded or unloaded state. This field provides load transfer options in the supervisory SMS and is a key component of the phase adjustment suggestion. The generation process is based on geospatial analysis and load status detection.

[0071] Light load refers to a transformer load rate that is consistently low (load rate ≤ 30% for 48 hours).

[0072] No-load is the extreme case of light load, with a load rate close to 0% (usually considered as a load rate ≤ 5%).

[0073] The terms "lightly loaded" and "unloaded" are combined and referred to as "lightly unloaded," indicating that these distribution transformers have remaining capacity to accommodate transferred loads.

[0074] Using the latitude and longitude coordinates of the current distribution transformer as the center and a geographical area with a radius of 500 meters, the Euclidean distance is calculated based on GIS. This distance is set based on the typical distribution transformer coverage radius to ensure the feasibility of load transfer.

[0075] This embodiment automatically generates a list of lightly unloaded distribution transformers within 500 meters through the following steps: All transformers are registered in the GIS with their latitude and longitude coordinates (e.g., via GPS or address resolution). The coordinates of the currently overloaded transformer are used as the center point.

[0076] The formula for calculating the distance between other transformers and the center point is:

[0077] in, Indicates the distance between other transformers and the center point; With the center coordinates, The coordinates of the transformer to be checked are shown. The system filters the set of transformers with a distance ≤ 500 meters.

[0078] For each distribution transformer within 500 meters, check its load rate history. The light load determination rule is: "If there is no data of load rate greater than 30 in this distribution area within 48 hours, it is a light load distribution transformer."

[0079] The system queries the load rate data for the past 48 hours. If the load rate of all sampling points is ≤30%, it is marked as "lightly unloaded distribution transformer".

[0080] Lightly unloaded distribution transformers are sorted by distance (from nearest to farthest) and key information (transformer number, current load rate, distance) is extracted.

[0081] In the follow-up text messages, the list is output in a concise format, such as "Lightly unloaded distribution transformers within 500 meters: Distribution transformer A (load rate 20%, distance 300 meters); Distribution transformer B (load rate 15%, distance 450 meters)".

[0082] Assuming the current coordinates of the heavily loaded transformer are (116.4, 39.9), there are three transformers within 500 meters: Transformer X: Coordinates (116.401, 39.902), distance 300 meters, load rate ≤25% for the past 48 hours.

[0083] Transformer Y: coordinates (116.398, 39.901), distance 400 meters, load rate has an instantaneous peak of 35% (not in line with light load).

[0084] Transformer Z: Coordinates (116.405, 39.898), distance 480 meters, load rate ≤10%. The system generates a list: only transformers X and Z meet the criteria. In the supervisory SMS message, it is marked as "Lightly unloaded transformers within 500 meters: Transformer X, Transformer Z," and the suggested phase shifting load is included.

[0085] The generation process relies on a GIS platform and a real-time database to ensure data freshness (update frequency ≤ 1 hour).

[0086] This field is linked to "Recommended load transfer": If the load cannot be balanced by the same distribution transformer, the system will prioritize transferring the load to these lightly unloaded distribution transformers to reduce the risk of overload.

[0087] The cumulative overload duration for the day is achieved through real-time sampling and status accumulation, quantifying the duration of distribution transformer overload. Lightly unloaded distribution transformers within 500 meters are generated based on GIS distance and load history, providing feasible load transfer targets. These two fields are crucial in the early warning system, supporting closed-loop management from monitoring to remediation and improving the reliability of the distribution network operation.

[0088] The data map displays the overload situation, specifically including: Plot the latitude and longitude coordinates of the urban area on a map; For each area, the heavy load duration of the distribution transformer is determined separately; Based on the duration of heavy load, the displays are arranged in red, orange, yellow, green, cyan, and blue, with blue representing transformers with light loads and red representing transformers with heavy loads. This visually reflects the transformer load rate in a given area, supporting distribution network investment and lean operation and maintenance.

[0089] This invention also provides a three-phase imbalance control system for distribution transformer loads, the system comprising: The data acquisition module is used to acquire the three-phase current data of the distribution transformer in real time. The calculation module calculates the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer. The early warning module generates three-phase imbalance early warning SMS and overload supervision SMS based on the calculation results; The visualization module displays the overload situation through a data map.

[0090] The three-phase imbalance control method for distribution transformer loads provided in this application can be applied to electronic devices. Those skilled in the art will understand that the electronic device structure involved in the embodiments of this invention does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than illustrated, or combine certain components, or have different component arrangements. In the embodiments of this invention, the electronic device includes, but is not limited to, laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of this application described and / or claimed herein.

[0091] Electronic devices may include processors, external memory interfaces, internal memory, universal serial bus (USB) interfaces, charging management modules, power management modules, batteries, wireless communication modules, audio modules, speakers, microphones, sensor modules, buttons, cameras, displays, and SIM card interfaces, etc.

[0092] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device. In other embodiments of this application, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0093] A processor may include one or more processing units, such as: a central processing unit (CPU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU). Different processing units may be independent devices or integrated into one or more processors.

[0094] The processor can serve as the nerve center and command center of an electronic device. The controller can generate operation control signals based on the instruction opcode and timing signals to control the fetching and execution of instructions.

[0095] The processor may also include memory for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. This memory can store instructions or data that the processor has just used or that are used repeatedly. If the processor needs to use the instruction or data again, it can retrieve it directly from this memory. This avoids repeated accesses, reduces processor latency, and thus improves system efficiency.

[0096] An external storage interface (ESI) can be used to connect external memory cards, such as microSD cards, to expand the storage capacity of electronic devices. The external memory card communicates with the processor through the ESI to perform data storage functions, such as saving music and video files on the external memory card.

[0097] Internal memory can be used to store computer executable program code, which includes instructions. The processor executes various functional applications and data processing of electronic devices by running the instructions stored in internal memory. Internal memory can include a program storage area and a data storage area. Internal memory can include high-speed random access memory, and can also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc.

[0098] Wireless communication functionality in electronic devices can be achieved through antennas, wireless communication modules, modem processors, and baseband processors.

[0099] Wireless communication modules can provide solutions for wireless communication applications in electronic devices, including wireless local area networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies.

[0100] Electronic devices can implement audio functions through audio modules, speakers, receivers, microphones, headphone jacks, and application processors.

[0101] Electronic devices can achieve shooting functions through ISPs, cameras, video codecs, GPUs, displays, and application processors.

[0102] Electronic devices can achieve display functions through GPUs, displays, and application processors.

[0103] A GPU is a microprocessor for image processing, connected to the display screen and application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering. A processor may include one or more GPUs, which execute program instructions to generate or modify display information.

[0104] A display screen is used to display images, videos, etc. A display screen includes a display panel.

[0105] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0106] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0107] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, apparatuses, or units, or they may be electrical, mechanical, or other forms of connection.

[0108] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0109] The aforementioned electronic equipment enables the real-time acquisition of three-phase current data of the distribution transformer in the three-phase unbalance control method of the distribution transformer load of this application; calculates the single-phase load rate and three-phase unbalance rate of the distribution transformer based on the three-phase current data; generates three-phase unbalance early warning SMS and overload supervision SMS according to the calculation results; and displays the overload situation through a data map, thereby improving the operation and maintenance control level of the power distribution equipment.

[0110] The storage medium provided in this application stores a program product capable of implementing a three-phase imbalance control method for distribution transformer loads.

[0111] The method for controlling three-phase imbalance of distribution transformer load includes: real-time acquisition of three-phase current data of distribution transformer; calculation of single-phase load rate and three-phase imbalance rate of distribution transformer based on the three-phase current data of distribution transformer; generation of three-phase imbalance early warning SMS and overload supervision SMS based on the calculation results; and display of overload situation through data map.

[0112] The three-phase imbalance control method for distribution transformer load provided in this application solves the problem of data acquisition delay in the prior art by acquiring the three-phase current data of the distribution transformer in real time, realizes continuous monitoring of the distribution transformer load, can capture abnormal situations in a timely manner, and improves monitoring efficiency.

[0113] This application solves the problem of non-real-time calculation by calculating the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer, and realizes accurate load assessment, providing a data foundation for early warning and supervision.

[0114] This application solves the problem of the early warning mechanism relying on manual intervention by generating three-phase imbalance early warning SMS and overload supervision SMS based on the calculation results, realizing automated proactive operation and inspection, and ensuring that problems are quickly notified to relevant personnel.

[0115] This application solves the problem of lack of visualization by displaying heavy load conditions through data maps, realizing intuitive heavy load monitoring and supporting distribution network investment and lean operation and maintenance decisions.

[0116] In some possible implementations, the three-phase imbalance control method for distribution transformer load of this disclosure can be implemented as a program product, which includes program code that, when the program product is run on a terminal device, causes the terminal device to perform the steps described in the "Exemplary Methods" section above according to various exemplary embodiments of this disclosure.

[0117] The storage medium disclosed herein may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0118] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0119] Any changes, modifications, substitutions, and variations made to the embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A method for controlling three-phase imbalance of distribution transformer load, characterized in that, The method includes: Real-time acquisition of three-phase current data from distribution transformers; Calculate the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer. Based on the calculation results, generate three-phase imbalance early warning SMS and overload supervision SMS; The heavy load situation is displayed through a data map.

2. The method for controlling three-phase imbalance of distribution transformer load as described in claim 1, characterized in that, The calculation of the single-phase load factor of the distribution transformer based on the three-phase current data of the distribution transformer specifically includes: Obtain the rated capacity of the transformer substation, and calculate the rated current based on the rated capacity. The expression is as follows: The expression for calculating the actual current is: in, This indicates the rated current value, in amperes (A). This represents the maximum value of the phase current, expressed in amperes (A). This indicates the rated capacity of the transformer substation, in kVA. Indicates CT ratio; The expression for calculating the single-phase load factor of a distribution transformer based on rated current and actual current is as follows: This represents the single-phase load factor of the distribution transformer, in percentages (%).

3. The method for controlling three-phase imbalance of distribution transformer load as described in claim 2, characterized in that, The three-phase unbalance rate is calculated based on the three-phase current data of the distribution transformer, specifically including: The expressions for calculating the maximum, minimum, and maximum absolute values ​​of the three-phase electricity (A, B, and C) are as follows: The load direction is determined by the sum of the maximum and minimum values, and its expression is as follows: if This indicates that the algebraic sum of the three-phase currents is non-negative and the load is positive. if , indicating that the algebraic sum is negative and the load is reversed; The three-phase unbalance rate is calculated based on the maximum value, minimum value, maximum absolute value, and load direction. The expression is as follows: Where Δ represents the three-phase imbalance rate.

4. The method for controlling three-phase imbalance of distribution transformer load as described in claim 3, characterized in that, Before calculating the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data, data preprocessing is also included, specifically: The values ​​of phases A, B, and C are obtained from the collected three-phase current data of the distribution transformer, and anomalies are checked. If any of the three phase values ​​(A, B, and C) are missing, the result is set to 0.0 for all three phases, and the data is discarded.

5. The method for controlling three-phase imbalance of distribution transformer load as described in claim 4, characterized in that, Based on the calculation results, a three-phase imbalance warning SMS message is generated, specifically including: When the calculation results show the single-phase load rate of the distribution transformer 60% and three-phase imbalance rate When the three-phase imbalance reaches 25%, an early warning SMS message will be automatically generated. The three-phase imbalance early warning SMS includes the single-phase load rate of the distribution transformer, the three-phase imbalance rate, the load direction, and a suggested phase shifting and load transfer. The three-phase imbalance early warning text messages were sent to the mobile phones of the power supply station director and the substation manager, respectively.

6. The method for controlling three-phase imbalance of distribution transformer load as described in claim 5, characterized in that, Based on the calculation results, a reloaded supervisory SMS message is generated, specifically including: When the calculation results show the single-phase load rate of the distribution transformer At 80%, automatically generate a heavy-load supervision SMS message; The heavy load supervision SMS includes the single-phase load rate of the distribution transformer, the three-phase imbalance rate, the cumulative duration of heavy load on the day, the load direction, the suggested phase adjustment to transfer the load, and the lightly unloaded distribution transformer within 500 meters. The heavy load supervision SMS messages were sent to the mobile phones of the person in charge of the operation and maintenance department, the person in charge of the equipment management unit, the director of the power supply station, and the area manager.

7. The method for controlling three-phase imbalance of distribution transformer load as described in claim 6, characterized in that, The data map displays the overload situation, specifically including: Plot the latitude and longitude coordinates of the urban area on a map; For each area, the heavy load duration of the distribution transformer is determined separately; Based on the duration of heavy load, the transformers are displayed in a color scheme of red, orange, yellow, green, cyan, and blue, with blue representing transformers with light loads and red representing transformers with heavy loads.

8. A system applied to the three-phase imbalance control method for distribution transformer load as described in any one of claims 1-7, characterized in that, The system includes: The data acquisition module is used to acquire the three-phase current data of the distribution transformer in real time. The calculation module calculates the single-phase load rate and three-phase imbalance rate of the distribution transformer based on the three-phase current data of the distribution transformer. The early warning module generates three-phase imbalance early warning SMS and overload supervision SMS based on the calculation results; The visualization module displays the overload situation through a data map.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the three-phase imbalance control method for distribution transformer load as described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the three-phase imbalance control method for distribution transformer load as described in any one of claims 1-7.

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