A method for predicting and analyzing power grid line loss trends

Abstract

The present invention provides a method for predicting and analyzing power grid line loss trends, comprising the following steps: step S1, collecting an incoming line voltage value, an outgoing line voltage value, and a number of coil turns of a transformer; step S2, obtaining a line loss rate of the transformer based on the incoming line voltage value, the outgoing line voltage value, and the number of coil turns; step S3, rotating the transformer 90 degrees, and repeating steps S1-S2 to obtain line loss rates in four directions of the transformer; step S4, comparing the line loss rates in the four directions of the transformer to obtain a minimum line loss rate, and rotating the transformer to the direction corresponding to the minimum line loss rate; by calculating the line loss rates in the four directions of the transformer, changes in line loss in the four directions of the transformer over a future period of time can be obtained, and then by rotating the transformer to the direction with the minimum line loss rate, the line loss of the transformer over a future period of time can be minimized, thereby reducing power transmission and distribution costs. Trend prediction and analysis of line losses in different directions can be achieved through repeated collection and adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid line loss analysis, and in particular to a power grid line loss trend prediction and analysis method. Background Art

[0002] Grid power loss (referred to as line loss) is the energy loss incurred during the transmission, transformation, and distribution stages of electricity from power plants to consumers. It is a critical comprehensive technical and economic indicator for power companies, reflecting the planning, design, production technology, and operational management of power grids. Reducing line loss is a key energy conservation task for the power sector. Controlling and reducing line loss, using scientific management methods to minimize unreasonable energy loss and achieving a scientifically reasonable line loss rate, is a core component of modern management for power grid companies and a prerequisite for their survival and development.

[0003] During the use of the transformer, the heat generated by its internal iron core will consume a portion of the electrical energy. After the transformer is installed, its orientation cannot be changed. During use, the aging degree of the heat dissipation fins on different sides of the transformer varies due to environmental changes. When the heat dissipation capacity of the heat dissipation fins on one side is significantly weaker than that of the heat dissipation fins on other sides, the heat generated by the iron core will increase much more than under normal conditions, resulting in increased line loss of the transformer and higher transmission and distribution costs. Summary of the Invention

[0004] In view of this, the present invention proposes a method for predicting and analyzing power grid line loss trends, which can calculate the line loss rate of the transformer in four directions, and use this to predict the line loss changes of the transformer in different directions in the future, so as to adjust the orientation of the transformer to reduce the line loss.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A method for predicting and analyzing power grid line loss trends includes the following steps:

[0007] Step S1, collecting the voltage value of the incoming line side, the voltage value of the outgoing line side and the number of coil turns of the transformer;

[0008] Step S2: Obtaining the line loss rate of the transformer according to the incoming voltage value, the outgoing voltage value, and the number of coil turns;

[0009] Step S3: Rotate the transformer 90 degrees and repeat steps S1-S2 to obtain the line loss rate of the transformer in four directions;

[0010] Step S4: Compare the line loss rates of the four directions of the transformer, obtain the minimum line loss rate, and rotate the transformer to the direction corresponding to the minimum line loss rate.

[0011] Preferably, in step S1, when collecting the incoming voltage value and the outgoing voltage value of the transformer, voltage collectors are provided on the incoming and outgoing sides of the transformer, and the voltage collectors collect the incoming voltage value and the outgoing voltage value.

[0012] Preferably, the specific steps of collecting the number of turns of the transformer coil in step S1 are:

[0013] Step S11: setting up a circular track outside the transformer and placing a controllable movable vehicle on the circular track;

[0014] Step S12: Install a camera on the controllable mobile trolley and drive the controllable mobile trolley to move on the circular track;

[0015] Step S13: The camera collects nameplate image data on the periphery of the transformer, and obtains the number of coil turns through the nameplate image data.

[0016] Preferably, the specific steps of step S13 of obtaining the number of coil turns through the nameplate image data are: inputting the nameplate image data into image processing software, extracting the text information contained in the nameplate image data by the image processing software, performing semantic recognition on the text information, and obtaining the number of coil turns.

[0017] Preferably, the specific steps of step S2 are:

[0018] Step S21: Calculate the theoretical output voltage value based on the input voltage value and the number of coil turns;

[0019] Step S22, calculating the difference between the theoretical outgoing line voltage value and the outgoing line voltage value;

[0020] Step S23: Compare the difference with the theoretical outgoing line voltage value to obtain the line loss rate of the transformer.

[0021] Preferably, in step S3, after the transformer is rotated 90 degrees, the steps S1 to S2 are executed after waiting for a period of time.

[0022] Preferably, a detection cycle is preset, and steps S1 to S4 are re-executed after the detection cycle ends.

[0023] Preferably, the transformer is provided with an initial position. After the detection cycle is completed, the transformer is rotated back to the initial state and then steps S1 to S4 are re-executed.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides a power grid line loss trend prediction and analysis method, which is used for predicting and analyzing line losses in different orientations of a transformer. The line loss rate of the transformer is calculated by collecting the incoming line voltage value, the outgoing line voltage value, and the number of coil turns of the transformer. After calculating the line loss rate of one side, the orientation of the transformer is rotated in sequence. After repeating the collection and calculation, the line loss rates of the transformer in four orientations can be obtained. By comparing the line loss rates in the four orientations, the orientation with the smallest line loss rate can be obtained. This orientation can be considered as the orientation with the smallest line loss rate of the transformer in a future period of time. After rotating the transformer to this orientation, the line loss of the transformer caused by the external environment can be minimized, thereby reducing the cost of power transmission and distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 The present invention is a flowchart of a method for predicting and analyzing power grid line loss trends. DETAILED DESCRIPTION

[0028] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0029] See also Figure 1 The present invention provides a method for predicting and analyzing power grid line loss trends, comprising the following steps:

[0030] Step S1, collecting the voltage value of the incoming line side, the voltage value of the outgoing line side and the number of coil turns of the transformer;

[0031] Step S2: Obtaining the line loss rate of the transformer according to the incoming voltage value, the outgoing voltage value, and the number of coil turns;

[0032] Step S3: Rotate the transformer 90 degrees and repeat steps S1-S2 to obtain the line loss rate of the transformer in four directions;

[0033] Step S4: Compare the line loss rates of the four directions of the transformer, obtain the minimum line loss rate, and rotate the transformer to the direction corresponding to the minimum line loss rate.

[0034] A power grid line loss trend prediction and analysis method of the present invention is used to calculate the line loss rate of a transformer in different orientations. During use, the heat generated by the transformer's iron core will vary due to changes in the external environment. After adjusting the orientation of the transformer, the position of the transformer relative to the surrounding environment changes, thereby changing the transformer's line loss. Based on the line loss rates in different orientations, the line loss trend of the transformer over a period of time in the future can be correspondingly obtained. This is used to analyze the optimal orientation of the transformer. After the transformer is rotated to the orientation with the minimum line loss, the transformer's line loss can be minimized, thereby reducing the cost of power transmission and distribution.

[0035] Specifically, the present invention first collects the incoming line voltage value, the outgoing line voltage value and the number of coil turns of the transformer. The number of coil turns is the ratio of the incoming line voltage value to the outgoing line voltage value of the transformer under ideal conditions. Therefore, after obtaining the number of coil turns and the actually measured incoming line voltage value and outgoing line voltage value, a comparative calculation can be performed to obtain the line loss rate of the transformer in the first direction. Then, the transformer is rotated 90 degrees to change the direction of the transformer, and the incoming line voltage value and the outgoing line voltage value are recollected. The line loss rate in the second direction is calculated based on the incoming line voltage value and the outgoing line voltage value. Similarly, the line loss rate in the four directions of the transformer can be obtained. After comparing the line loss rates in the four directions, the direction with the smallest line loss rate of the transformer can be obtained. At this time, the transformer is rotated to the direction with the smallest line loss rate. The line loss of the transformer when operating in this direction is the smallest, thereby reducing the cost of power transmission and distribution.

[0036] Preferably, in step S1, when collecting the incoming voltage value and the outgoing voltage value of the transformer, voltage collectors are provided on the incoming and outgoing sides of the transformer, and the voltage collectors collect the incoming voltage value and the outgoing voltage value.

[0037] In order to ensure the accuracy of transformer data collection, voltage collectors are set on the incoming and outgoing sides of the transformer respectively. The voltage collectors can collect the voltage values ​​of the incoming and outgoing sides of the transformer in real time.

[0038] Preferably, the specific steps of collecting the number of turns of the transformer coil in step S1 are:

[0039] Step S11: setting up a circular track outside the transformer and placing a controllable movable vehicle on the circular track;

[0040] Step S12: Install a camera on the controllable mobile trolley and drive the controllable mobile trolley to move on the circular track;

[0041] Step S13: The camera collects nameplate image data on the periphery of the transformer, and inputs the nameplate image data into image processing software. The image processing software extracts the text information contained in the nameplate image data, performs semantic recognition on the text information, and obtains the number of coil turns.

[0042] As for the number of coil turns of the transformer, the present invention obtains it by obtaining the nameplate image data of the transformer. A circular track is set up on the periphery of the transformer, and a controllable mobile cart is set on the circular track. When collecting the number of coil turns of the transformer, the controllable mobile cart is driven to move on the circular track. During the movement, the camera on the controllable mobile cart can collect the image data of the nameplate fixed on the periphery of the transformer, and then input the nameplate image data into the image processing software. After the image processing software performs denoising and decolorization on the nameplate image data, the text information contained in the nameplate image data is extracted, and then the text information is recognized through semantic recognition to obtain the number of coil turns contained in the nameplate.

[0043] Preferably, the specific steps of step S2 are:

[0044] Step S21: Calculate the theoretical output voltage value based on the input voltage value and the number of coil turns;

[0045] Step S22, calculating the difference between the theoretical outgoing line voltage value and the outgoing line voltage value;

[0046] Step S23: Compare the difference with the theoretical outgoing line voltage value to obtain the line loss rate of the transformer.

[0047] Since the number of coil turns is obtained based on the ratio of the transformer input side voltage to the output side voltage under ideal conditions, after obtaining the number of coil turns and the input side voltage value, the output side voltage value under ideal conditions can be calculated. Due to the existence of transformer line loss, the output side voltage value must be different from the ideal output side voltage value. Therefore, the difference between the two is calculated, and the difference is divided by the theoretical output side voltage value to obtain the transformer line loss rate. The smaller the line loss rate, the smaller the transformer line loss.

[0048] Preferably, in step S3, after the transformer is rotated 90 degrees, the steps S1 to S2 are executed after waiting for a period of time.

[0049] Since the line loss rate of the transformer needs to be calculated in four directions, the transformer needs to be rotated after the first calculation of the line loss rate. In order to ensure the accuracy of data collection, after the rotation is completed, the transformer is allowed to run for a certain period of time before the incoming and outgoing voltage values ​​are collected again.

[0050] Preferably, a detection cycle is preset, and steps S1 to S4 are re-executed after the detection cycle ends.

[0051] The present invention adjusts the orientation of the transformer periodically. For example, when the detection cycle is one month, the line loss rates in the four directions are automatically collected again after the end of the month. After the collection is completed, the line loss prediction analysis is performed and the orientation of the transformer is adjusted.

[0052] Preferably, the transformer is provided with an initial position. After the detection cycle is completed, the transformer is rotated back to the initial state and then steps S1 to S4 are re-executed.

[0053] In order to prevent the input and output cables of the transformer from being overstretched when adjusting the direction of the transformer, the present invention sets an initial position of the transformer. Before adjusting the direction of the transformer each time, the transformer is first rotated to the initial position to restore the input and output cables to their initial state. When adjusting the direction again, the cables can be prevented from being damaged by excessive stretching, thereby ensuring the normal use of the transformer.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for predicting and analyzing power grid line loss trends, characterized in that: The following steps are involved: Step S1, collecting the voltage value of the incoming line side, the voltage value of the outgoing line side and the number of coil turns of the transformer; Step S2: Obtaining the line loss rate of the transformer according to the incoming voltage value, the outgoing voltage value, and the number of coil turns; Step S3: Rotate the transformer 90 degrees and repeat steps S1-S2 to obtain the line loss rate of the transformer in four directions; after rotating the transformer 90 degrees, wait for a while and then execute steps S1-S2 again; Step S4: Compare the line loss rates of the four directions of the transformer, obtain the minimum line loss rate, and rotate the transformer to the direction corresponding to the minimum line loss rate; A detection cycle is preset, and the transformer is set to an initial position. After the detection cycle ends, the transformer is rotated back to the initial state and then steps S1 to S4 are re-executed; The specific steps of step S2 are: Step S21: Calculate the theoretical output voltage value based on the input voltage value and the number of coil turns; Step S22, calculating the difference between the theoretical outgoing line voltage value and the outgoing line voltage value; Step S23: Compare the difference with the theoretical outgoing line voltage value to obtain the line loss rate of the transformer.

2. A method for predicting and analyzing power grid line loss trends according to claim 1, characterized in that: In step S1, when collecting the incoming voltage value and the outgoing voltage value of the transformer, voltage collectors are set on the incoming and outgoing sides of the transformer, and the voltage collectors collect the incoming voltage value and the outgoing voltage value.

3. A method for predicting and analyzing power grid line loss trends according to claim 1, characterized in that: The specific steps of step S1 to collect the number of turns of the transformer coil are: Step S11: setting up a circular track outside the transformer and placing a controllable movable vehicle on the circular track; Step S12: Install a camera on the controllable mobile trolley and drive the controllable mobile trolley to move on the circular track; Step S13: The camera collects nameplate image data on the periphery of the transformer, and obtains the number of coil turns through the nameplate image data.

4. A method for predicting and analyzing power grid line loss trends according to claim 3, characterized in that: The specific steps of step S13 of obtaining the number of coil turns through the nameplate image data are: inputting the nameplate image data into image processing software, extracting the text information contained in the nameplate image data by the image processing software, performing semantic recognition on the text information, and obtaining the number of coil turns.

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