Line loss reduction method and device based on three-phase load adjustment, equipment and medium

Abstract

The invention discloses a line loss reduction method and device based on three-phase load adjustment, equipment and a medium, and the method comprises the steps: collecting a three-phase load current corresponding to a power transmission line in response to a loss reduction request, and constructing a load square-time curve; creating a line loss change objective function according to a load square-time curve; calculating the minimum value of the line loss change objective function under the load constraint, and determining an adjustment load; and adjusting the three-phase load current according to the adjustment load to reduce the line loss of the power transmission line. Therefore, line loss calculation can be accurately carried out for continuous and changing three-phase load current, and the accuracy of line loss management and control is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of line loss reduction, and in particular to a line loss reduction method, device, equipment and medium based on three-phase load adjustment. Background Art

[0003] For power supply companies, line loss is a key indicator that affects the company's economic benefits and energy efficiency. Line loss refers to the energy consumption and loss in the process of transmitting electricity from the power generation end to the user end, as well as in the marketing link.

[0004] To this end, the existing technology usually proposes a loss reduction solution by replacing aluminum wires with copper wires and doing a good job of the docking process to reduce line resistance or reduce the power supply radius. However, in actual power grids, line currents change in real time with user power consumption, making it difficult to accurately calculate the actual line loss reduction. Summary of the invention

[0005] The present invention provides a line loss reduction method, device, equipment and medium based on three-phase load adjustment, which solves the technical problem that in an actual power grid, the line current changes in real time with the user's power consumption, making it difficult to accurately calculate the actual line loss reduction.

[0006] A first aspect of the present invention provides a line loss reduction method based on three-phase load adjustment, comprising:

[0007] In response to loss reduction requests, the three-phase load current corresponding to the transmission line is collected and a load square-time curve is constructed;

[0008] According to the load square-time curve, a line loss change objective function is created;

[0009] Calculating the minimum value of the line loss change objective function under load constraints, and determining the adjusted load;

[0010] The three-phase load current is adjusted according to the adjusted load to reduce the line loss of the transmission line.

[0011] Optionally, responding to the loss reduction request, collecting the three-phase load current corresponding to the transmission area, and constructing a load square-time curve includes:

[0012] In response to loss reduction requests, collect three-phase load currents corresponding to the transmission lines;

[0013] Constructing a load current-time curve according to the three-phase load current and the corresponding acquisition time;

[0014] The load current-time curve is transformed to generate a load square-time curve.

[0015] Optionally, creating a line loss change objective function according to the load square-time curve includes:

[0016] According to the integration of the load square-time curve over time, a function for calculating line loss before adjustment is created;

[0017] Performing load superposition on the three-phase load currents in the line loss calculation function before adjustment to generate the line loss calculation function after adjustment;

[0018] The difference between the adjusted line loss calculation function and the adjusted line loss calculation function is calculated to obtain a line loss change target function.

[0019] Optionally, the load adjustment includes a first phase adjustment load and a second phase adjustment load; and adjusting the three-phase load current according to the load adjustment includes:

[0020] Calculate the difference between a preset zero value and the first phase adjustment load and the second phase adjustment load to obtain a third phase adjustment load;

[0021] According to the first phase adjustment load, the second phase adjustment load and the third phase adjustment load, a load adjustment component is called to adjust the three-phase load current.

[0022] Optionally, the line loss change objective function is:

[0023]

[0024] in, is the line loss variation, is the adjustment load corresponding to the first phase, is the adjustment load corresponding to the second phase, is the load current corresponding to the first phase, is the load current corresponding to the second phase, is the load current corresponding to the third phase, t is the acquisition period of the three-phase load current, is the line resistance of the transmission line.

[0025] Optionally, the method further comprises:

[0026] When the new energy power station is connected to the transmission line, the three-phase load current corresponding to the transmission line is collected again, and the step of executing the three-phase load current corresponding to the transmission line is jumped.

[0027] Optionally, the method further comprises:

[0028] Real-time detection of the line resistance of the power transmission line;

[0029] When the change amount of the line resistance in the preset detection period is greater than the preset change threshold, calculating the resistance average value of the line resistance in the preset detection period;

[0030] The line loss change objective function is updated according to the resistance average value, and the step of calculating the minimum value of the line loss change objective function under the load constraint is jumped to determine the step of adjusting the load.

[0031] A second aspect of the present invention provides a line loss reduction device based on three-phase load adjustment, comprising:

[0032] The current acquisition module is used to respond to the loss reduction request, collect the three-phase load current corresponding to the transmission line, and construct the load square-time curve;

[0033] An objective function building module, used to create a line loss change objective function according to the load square-time curve;

[0034] A load calculation module, used to calculate the minimum value of the line loss change objective function under load constraints and determine the adjusted load;

[0035] The load adjustment module is used to adjust the three-phase load current according to the adjustment load to reduce the line loss of the transmission line.

[0036] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the line loss reduction method based on three-phase load adjustment as described in any one of the first aspect of the present invention.

[0037] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed, the line loss reduction method based on three-phase load adjustment as described in any one of the first aspect of the present invention is implemented.

[0038] It can be seen from the above technical solutions that the present invention has the following advantages:

[0039] The present invention collects the three-phase load current corresponding to the transmission line in response to the loss reduction request, and constructs the load square-time curve; creates the line loss change objective function according to the load square-time curve; calculates the minimum value of the line loss change objective function under the load constraint, determines the adjusted load; adjusts the three-phase load current according to the adjusted load to reduce the line loss of the transmission line. Therefore, the line loss calculation can be accurately performed for the continuous and changing three-phase load current, effectively improving the accuracy of line loss control. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 A flowchart of a method for reducing line loss based on three-phase load adjustment provided by an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of a load current-time curve provided by an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of a load square-time curve provided by an embodiment of the present invention;

[0044] Figure 4 A structural block diagram of a line loss reduction device based on three-phase load adjustment provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The embodiments of the present invention provide a line loss reduction method, device, equipment and medium based on three-phase load adjustment, which are used to solve the technical problem that in an actual power grid, the line current changes in real time with the user's power consumption, making it difficult to accurately calculate the actual line loss reduction.

[0046] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1 , Figure 1 A flow chart of the steps of a line loss reduction method based on three-phase load adjustment provided in an embodiment of the present invention.

[0048] The present invention provides a line loss reduction method based on three-phase load adjustment, comprising:

[0049] Step 101, in response to a loss reduction request, collecting three-phase load currents corresponding to the transmission line, and constructing a load square-time curve;

[0050] In the embodiment of the present invention, after the device receives the loss reduction request input by the user, the data collection process is started, and the three-phase load current corresponding to the transmission line is accurately collected using a high-precision current sensor. The sensor has excellent sensitivity and stability, and can capture the dynamic changes of the three-phase load current in real time, ensuring the accuracy and integrity of the collected data.

[0051] Based on the collected three-phase load current data, a load square-time curve is constructed using a professional data processing algorithm. During the construction process, the original data is strictly screened, calibrated and analyzed to eliminate possible noise interference and measurement errors. Through this curve, the continuous change trend of the load square over time can be presented intuitively and clearly, providing a solid data foundation for subsequent line loss analysis and loss reduction strategy formulation.

[0052] In order to accurately present the characteristics of load changes over time and assist in subsequent power analysis, it is necessary to use professional data processing algorithms to construct load square-time curves. First, the collected three-phase load current raw data is preprocessed using a filtering algorithm to remove outliers and noise interference in the data to ensure the accuracy and reliability of the data. Commonly used filtering algorithms include mean filtering, median filtering, etc., and the appropriate algorithm can be selected according to the characteristics of the data.

[0053] Next, the filtered data is processed using a data fitting algorithm. Taking the least squares method as an example, by minimizing the sum of square errors between the actual data and the fitting curve, the functional relationship that best represents the load current change trend is found. The obtained load current function is squared to obtain the function expression of the load square.

[0054] Finally, with time as the horizontal axis and load square as the vertical axis, the drawing algorithm is used to intuitively display the change relationship between load square and time in the form of a curve. Through this series of rigorous and professional data processing processes, the load square-time curve constructed can provide strong data support for line loss analysis, load adjustment and other work of the power system.

[0055] In an example of the present invention, step 101 may include the following sub-steps:

[0056] In response to loss reduction requests, collect three-phase load currents corresponding to the transmission lines;

[0057] According to the three-phase load current and the corresponding acquisition time, a load current-time curve is constructed;

[0058] The load current-time curve is transformed to generate a load square-time curve.

[0059] In this embodiment, in response to the loss reduction request input by the user, the three-phase load current corresponding to the transmission line is collected. After the power supply load (load can be understood as current) is determined, the total three-phase current at each time node is fixed, so the three-phase load distribution of the mains power needs to be adjusted. With the collection time as the horizontal axis and the three-phase load current as the vertical axis, a load current-time curve is constructed, such as Figure 2 shown.

[0060] In time When , the line loss is: *R+ *R+ *R

[0061] The total load is: + +

[0062] When the total load remains unchanged, adjust , , In the actual operation of electrical equipment, the load is divided into stable load (power and current are relatively stable) and unstable load (power and current are unstable). The stable load can be adjusted to achieve the purpose of reducing losses.

[0063] right Figure 2 The load current-time curve in is converted to generate the load square-time curve, such as Figure 3 shown.

[0064] Step 102, creating a line loss change objective function according to the load square-time curve;

[0065] In one example of the present invention, step 102 may include the following sub-steps:

[0066] According to the time integration of the load square-time curve, create a function for calculating line loss before adjustment;

[0067] Load superposition is performed on the three-phase load currents in the line loss calculation function before adjustment to generate the line loss calculation function after adjustment;

[0068] The difference between the line loss calculation function after adjustment and the line loss calculation function before adjustment is calculated to obtain the line loss change target function.

[0069] In the embodiment of the present invention, , where R is the resistance of the line itself, which can be regarded as a fixed value after the line construction is completed. Figure 2 The integral of the three curves over time, that is, the adjustment front line loss calculation function is:

[0070] ( + )R

[0071] The three-phase load current in the line loss calculation function before adjustment is superimposed to simulate the line loss situation under load superposition, where:

[0072] =

[0073] =

[0074] =

[0075] in, , , is the corresponding adjusted load value of ABC (may be negative), and + + =0.

[0076] Construct the adjusted line loss calculation function as follows:

[0077]

[0078] Calculate the difference between the line loss calculation function after adjustment and the line loss calculation function before adjustment to obtain the line loss change target function, that is:

[0079]

[0080] Among them, the line loss change objective function is:

[0081]

[0082] in, is the line loss variation, is the adjustment load corresponding to the first phase, is the adjustment load corresponding to the second phase, is the load current corresponding to the first phase, is the load current corresponding to the second phase, is the load current corresponding to the third phase, t is the acquisition period of the three-phase load current, is the line resistance of the transmission line.

[0083] Step 103, calculating the minimum value of the line loss change objective function under the load constraint, and determining the adjusted load;

[0084] Load constraints refer to the constraints that limit the maximum increase and decrease of load adjustment, which may include but are not limited to the following conditions:

[0085]

[0086] .

[0087] In the embodiment of the present invention, the three-phase load current usually has a periodic property, so the three-phase load current in the load current-time curve of the previous cycle can be selected as the line loss change objective function. , , At the same time, after the line construction is completed, the line resistance of the transmission line is usually in a fixed state when the environment does not change much. At this time, the above load constraints can be combined to substitute the minimum line loss change of the line loss change objective function to determine the adjusted load under the condition of reducing line loss. Among them, since the line loss will decrease after the adjustment load is added, and the smaller the value, the more obvious the loss reduction effect, the minimum line loss change is usually a negative number.

[0088] In this embodiment, firstly, according to the line loss change objective function, and Find the partial derivative and get , . judge and Whether the above load constraints are met, if so, it indicates that the value at this time is a possible extreme point, and the and Substitute it into the line loss change objective function and calculate the second-order partial derivative of the line loss change objective function to determine whether it is the minimum point.

[0089] if and If the load constraint is not met, the minimum value may be at the boundary of the load constraint. and One of them is placed at the boundary value of the load constraint, and the other adjusted load is derived to determine whether the other adjusted load meets the load constraint. If it does, the current and To adjust the load.

[0090] If you are still not satisfied, and At the same time, the boundary values ​​of the load constraints are placed, and the values ​​in the four cases are substituted into the line loss change objective function to determine the minimum point.

[0091] Step 104, adjusting the three-phase load current according to the load adjustment to reduce the line loss of the transmission line.

[0092] In the embodiment of the present invention, after the adjustment load is calculated, the first phase adjustment load is included. and the second phase adjusts the load In order to reduce the line loss of the transmission line, the third phase adjustment load can be further calculated according to the adjustment load, and the three-phase load current can be adjusted according to the adjustment load of each phase.

[0093] In one example of the present invention, the load adjustment includes a first phase adjustment load and a second phase adjustment load; step 104 may include the following sub-steps:

[0094] Calculate the difference between the preset zero value and the first phase adjustment load and the second phase adjustment load to obtain a third phase adjustment load;

[0095] According to the first phase adjustment load, the second phase adjustment load and the third phase adjustment load, the load adjustment component is called to adjust the three-phase load current.

[0096] In this embodiment, due to + + =0, calculate the preset zero value and the first phase to adjust the load , the second phase adjusts the load The difference between the third phase adjustment load Further, according to the load adjustment of each phase, the load adjustment component is called to adjust the three-phase load current.

[0097] Among them, the load adjustment components may include but are not limited to devices such as transformers, switching capacitor banks, load switches or smart meters. Taking the load switch as an example, the three-phase load current can be connected or disconnected according to the load adjustment of each phase, thereby converting part of the load from one phase to another. According to the imbalance of the three-phase load current and the goal of adjusting the load, determine the amount of load to be transferred and the direction of transfer. Then, operate the load switch to switch the corresponding load from the phase with larger current to the phase with smaller current. For example, if the load current of phase A is too large and the load current of phase B is small, part of the load of phase A can be switched to phase B through the load switch.

[0098] Taking smart meters as an example, since the three-phase load current changes over time, the parameters that need to be adjusted (such as voltage, reactive power, etc.) can be calculated based on the first phase load adjustment, the second phase load adjustment, and the third phase load adjustment, combined with the three-phase load current monitored in real time. Then, the smart meter sends a control signal to the corresponding hardware equipment (such as transformers, capacitor banks, etc.) to adjust the load current.

[0099] In one example of the present invention, the method further comprises the following steps:

[0100] When the new energy power station is connected to the transmission line, the three-phase load current corresponding to the transmission line is collected again, and the step of executing the three-phase load current corresponding to the transmission line is jumped.

[0101] New energy power stations refer to power stations with intermittent and fluctuating characteristics, such as solar energy, wind energy, and wave energy.

[0102] In this embodiment, when the new energy power station is connected to the transmission line, the transmission line is impacted by external input, causing the three-phase load current to fluctuate. In addition, since the new energy power station is usually volatile, the three-phase load current will be in a fluctuating state. In order to effectively reduce the line loss, the execution of step 101 can be jumped to recalculate and adjust the load and other parameters to reduce the line loss.

[0103] In addition, to further improve the effectiveness of line loss reduction, machine learning algorithms such as neural networks, support vector machines and time series analysis methods can be used to establish a new energy power generation prediction model, and the power output of new energy power generation can be predicted according to weather forecast information and historical power generation data, thereby providing a basis for load adjustment. Alternatively, an energy storage system can be added to control the charging and discharging of the energy storage system, smooth the fluctuations of new energy power generation, stabilize power output, and reduce the pressure on load adjustment.

[0104] In one example of the present invention, the method further comprises the following steps:

[0105] Real-time detection of line resistance of transmission lines;

[0106] When the change amount of the line resistance in the preset detection period is greater than the preset change threshold, calculating the resistance average value of the line resistance in the preset detection period;

[0107] The line loss change objective function is updated according to the resistance mean value, and the calculation of the minimum value of the line loss change objective function under the load constraint is jumped to determine the steps for adjusting the load.

[0108] In the embodiment of the present invention, since the line resistance may change with the transmission distance, line material or environmental factors, in order to further improve the effectiveness of line loss reduction, the line resistance of the transmission line can be detected in real time. For example, online monitoring devices such as smart meters and fault location devices are installed at key positions of three-phase transmission lines. These devices can collect data such as current and voltage of the line in real time. The monitoring device transmits the collected data to the monitoring center through the communication network. The data analysis system of the monitoring center uses special algorithms and software to process and analyze the transmitted data, calculate the real-time resistance value of the three-phase transmission line, and monitor and warn the changes in the resistance value in real time.

[0109] When it is detected that the change in line resistance within the preset detection period is greater than the preset change threshold, since the line resistance may be a single-phase increase or a multi-phase increase, the line resistance in the line loss change objective function can be replaced and updated by calculating the average resistance of each phase line resistance within the preset detection period, and step 103 is executed again to calculate the new adjustment load to adjust the three-phase load current.

[0110] In addition, after detecting the change in line resistance, reactive power can be injected or absorbed into the system through a reactive compensation device to adjust the voltage and power factor, thereby affecting the load distribution of each phase. For example, when the resistance of phase A increases and the power factor is low, an appropriate amount of capacitors can be invested in phase A for reactive compensation to improve the power factor of phase A, increase the current of phase A, and thus increase the load of phase A. For some single-phase loads on the transmission line that can be controlled in phases, such as single-phase motors, single-phase heating equipment, etc., their connection or disconnection can be directly adjusted according to the resistance change of each phase. If the resistance of a phase increases, the number of single-phase loads on that phase can be appropriately reduced, and these loads can be transferred to the phase with smaller resistance. For example, if the resistance of phase B increases, some single-phase lighting loads on phase B can be switched to phase A or phase C.

[0111] In the embodiment of the present invention, by responding to the loss reduction request, the three-phase load current corresponding to the transmission line is collected, and the load square-time curve is constructed; according to the load square-time curve, the line loss change objective function is created; the minimum value of the line loss change objective function under the load constraint is calculated to determine the adjusted load; the three-phase load current is adjusted according to the adjusted load to reduce the line loss of the transmission line. Therefore, the line loss calculation can be accurately performed for the continuous and changing three-phase load current, effectively improving the accuracy of line loss control.

[0112] See also Figure 4 , Figure 4 A structural block diagram of a line loss reduction device based on three-phase load adjustment in an embodiment of the present invention is shown.

[0113] An embodiment of the present invention provides a line loss reduction device based on three-phase load adjustment, comprising:

[0114] The current acquisition module 401 is used to respond to the loss reduction request, collect the three-phase load current corresponding to the transmission line, and construct a load square-time curve;

[0115] An objective function building module 402 is used to create a line loss change objective function according to a load square-time curve;

[0116] The load calculation module 403 is used to calculate the minimum value of the line loss change objective function under the load constraint and determine the adjusted load;

[0117] The load adjustment module 404 is used to adjust the three-phase load current according to the load adjustment to reduce the line loss of the transmission line.

[0118] Optionally, the current acquisition module 401 is specifically used for:

[0119] In response to loss reduction requests, collect three-phase load currents corresponding to the transmission lines;

[0120] According to the three-phase load current and the corresponding acquisition time, a load current-time curve is constructed;

[0121] The load current-time curve is transformed to generate a load square-time curve.

[0122] Optionally, the objective function construction module 402 is specifically used for:

[0123] According to the time integration of the load square-time curve, create a function for calculating line loss before adjustment;

[0124] Load superposition is performed on the three-phase load currents in the line loss calculation function before adjustment to generate the line loss calculation function after adjustment;

[0125] The difference between the line loss calculation function after adjustment and the line loss calculation function before adjustment is calculated to obtain the line loss change target function.

[0126] Optionally, the load adjustment includes a first phase load adjustment and a second phase load adjustment; the load adjustment module 404 is specifically used for:

[0127] Calculate the difference between the preset zero value and the first phase adjustment load and the second phase adjustment load to obtain a third phase adjustment load;

[0128] According to the first phase adjustment load, the second phase adjustment load and the third phase adjustment load, the load adjustment component is called to adjust the three-phase load current.

[0129] Optionally, the line loss change objective function is:

[0130]

[0131] in, is the line loss variation, is the adjustment load corresponding to the first phase, is the adjustment load corresponding to the second phase, is the load current corresponding to the first phase, is the load current corresponding to the second phase, is the load current corresponding to the third phase, t is the acquisition period of the three-phase load current, is the line resistance of the transmission line.

[0132] Optionally, the device further includes a first cycle adjustment module, configured to:

[0133] When the new energy power station is connected to the transmission line, the three-phase load current corresponding to the transmission line is collected again, and the step of executing the three-phase load current corresponding to the transmission line is jumped.

[0134] Optionally, the device further includes a second cycle adjustment module, configured to:

[0135] Real-time detection of line resistance of transmission lines;

[0136] When the change amount of the line resistance in the preset detection period is greater than the preset change threshold, calculating the resistance average value of the line resistance in the preset detection period;

[0137] The line loss change objective function is updated according to the resistance mean value, and the calculation of the minimum value of the line loss change objective function under the load constraint is jumped to determine the steps for adjusting the load.

[0138] An embodiment of the present invention provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the line loss reduction method based on three-phase load adjustment as described in any embodiment of the present invention.

[0139] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed, the line loss reduction method based on three-phase load adjustment as described in any embodiment of the present invention is implemented.

[0140] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0141] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0142] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0143] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0144] If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for an electronic device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0145] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A line loss reduction method based on three-phase load adjustment, characterized in that: include: In response to loss reduction requests, the three-phase load current corresponding to the transmission line is collected and a load square-time curve is constructed; According to the load square-time curve, a line loss change objective function is created; Calculating the minimum value of the line loss change objective function under load constraints, and determining the adjusted load; The three-phase load current is adjusted according to the adjusted load to reduce the line loss of the transmission line.

2. The method according to claim 1, characterized in that The responding to the loss reduction request, collecting the three-phase load current corresponding to the transmission area, and constructing the load square-time curve, includes: In response to loss reduction requests, collect three-phase load currents corresponding to the transmission lines; Constructing a load current-time curve according to the three-phase load current and the corresponding acquisition time; The load current-time curve is transformed to generate a load square-time curve.

3. The method according to claim 1, characterized in that The creating a line loss change objective function according to the load square-time curve includes: According to the integration of the load square-time curve over time, a function for calculating line loss before adjustment is created; Performing load superposition on the three-phase load currents in the line loss calculation function before adjustment to generate the line loss calculation function after adjustment; The difference between the adjusted line loss calculation function and the adjusted line loss calculation function is calculated to obtain a line loss change target function.

4. The method according to claim 1, characterized in that: The load adjustment includes a first phase adjustment load and a second phase adjustment load; and adjusting the three-phase load current according to the load adjustment includes: Calculate the difference between a preset zero value and the first phase adjustment load and the second phase adjustment load to obtain a third phase adjustment load; According to the first phase adjustment load, the second phase adjustment load and the third phase adjustment load, a load adjustment component is called to adjust the three-phase load current.

5. The method according to any one of claims 1 to 4, characterized in that: The line loss change objective function is: in, is the line loss variation, is the adjustment load corresponding to the first phase, is the adjustment load corresponding to the second phase, is the load current corresponding to the first phase, is the load current corresponding to the second phase, is the load current corresponding to the third phase, t is the acquisition period of the three-phase load current, is the line resistance of the transmission line.

6. The method according to claim 1, characterized in that The method further comprises: When the new energy power station is connected to the transmission line, the three-phase load current corresponding to the transmission line is collected again, and the step of executing the three-phase load current corresponding to the transmission line is jumped.

7. The method according to claim 1, characterized in that The method further comprises: Real-time detection of the line resistance of the power transmission line; When the change amount of the line resistance in the preset detection period is greater than the preset change threshold, calculating the resistance average value of the line resistance in the preset detection period; The line loss change objective function is updated according to the resistance average value, and the step of calculating the minimum value of the line loss change objective function under the load constraint is jumped to determine the step of adjusting the load.

8. A line loss reduction device based on three-phase load adjustment, characterized in that: include: The current acquisition module is used to respond to the loss reduction request, collect the three-phase load current corresponding to the transmission line, and construct the load square-time curve; An objective function building module, used to create a line loss change objective function according to the load square-time curve; A load calculation module, used to calculate the minimum value of the line loss change objective function under load constraints and determine the adjusted load; The load adjustment module is used to adjust the three-phase load current according to the adjustment load to reduce the line loss of the transmission line.

9. An electronic device, characterized in that: It comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the line loss reduction method based on three-phase load adjustment as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the line loss reduction method based on three-phase load adjustment as described in any one of claims 1 to 7 is implemented.

Images