A power line loss analysis system and method for power transmission and transformation engineering

Abstract

The invention relates to the technical field of power loss, and discloses a power line loss analysis system and method for power transmission and transformation engineering. The specific method comprises: step one: acquiring collected data in real time, calculating and obtaining a real-time power line loss value according to the collected data, processing and analyzing the real-time power line loss value, so as to determine whether the real-time power line loss value is abnormal; step two: acquiring line temperature in real time, deducing a relationship formula between line temperature and real-time power line loss value according to historical data of line temperature and real-time power line loss value, drawing a temperature influence curve diagram based on the relationship formula, and obtaining a corresponding measure plan according to the temperature influence curve diagram; the power line loss situation can be reflected more accurately, and the accuracy and efficiency of power line loss analysis can be improved; it is helpful to reduce power line loss, reduce energy waste and environmental pollution, promote energy conservation and emission reduction and sustainable development, improve the power factor of the power system, and make the power system operate more efficiently and stably.

Description

Technical Field

[0001] The present invention relates to the technical field of power loss, and in particular to a power line loss analysis system and method for power transmission and transformation engineering. Background Art

[0002] Power line loss refers to the electric energy loss caused by various reasons in the power transmission and transformation project power system. This loss usually includes two parts: technical line loss and management line loss. Technical line loss is the electric energy loss caused by the thermal effect when the current passes through the wires, transformers and other equipment. This loss can be reduced by improving the performance of the equipment and optimizing the grid structure. Management line loss is the electric energy loss caused by poor management and inaccurate measurement. This loss can be reduced by strengthening management and improving measurement accuracy. In order to reduce power line loss, a series of measures can be taken, such as strengthening equipment maintenance, optimizing the grid structure, and improving measurement accuracy.

[0003] Chinese patent number CN114580819A discloses a line loss anomaly analysis operation monitoring system and method based on big data, including an indicator statistics module, an anomaly classification module, an anomaly analysis module and an analysis result module; the indicator statistics module is used to obtain the line loss statistical data of the metering system for standard verification, and obtain a line loss anomaly list and a high loss list; the anomaly classification module is used to classify the abnormal causes of the data in the line loss anomaly list according to the line loss rate; the anomaly analysis module is used to specifically analyze and judge the abnormal causes; the analysis result module is used to display and summarize the specific causes of the abnormalities.

[0004] However, as the scale of the power system continues to expand, the loss problem of power lines has become increasingly prominent. Traditional power line loss analysis methods often rely on manual operations, are inefficient, and are difficult to fully and accurately reflect the line loss situation. In order to solve this problem, a power line loss analysis system and method for power transmission and transformation projects is needed to improve the accuracy and efficiency of line loss analysis. Summary of the invention

[0005] The object of the present invention is to provide a power line loss analysis system and method for power transmission and transformation engineering to solve the technical problems in the above background.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A power line loss analysis system and method for power transmission and transformation engineering, the specific method comprises the following steps:

[0008] Step 1: obtaining collected data in real time, calculating the real-time power line loss value according to the collected data, drawing a power line loss fluctuation diagram according to the real-time power line loss value, analyzing the power line loss fluctuation diagram, and determining whether the real-time power line loss value is abnormal, wherein the collected data includes: active current and reactive current;

[0009] Step 2: Collect line temperature in real time, and derive the relationship formula between line temperature and real-time power line loss value based on historical data of line temperature and real-time power line loss value. Draw a temperature impact curve based on the relationship formula, and then derive corresponding measures based on the temperature impact curve.

[0010] As a further solution of the present invention: the specific method for determining whether the real-time power line loss value is abnormal is:

[0011] A1: Collect data on the line in real time and obtain collected data;

[0012] A2: Based on the collected data, the real-time power line loss value is calculated by formula;

[0013] A3: Draw a power line loss fluctuation graph based on the real-time power line loss value, and mark the area exceeding the rated power line loss value as a shaded area;

[0014] A4: Calculate the area of ​​the shaded region in the power line loss fluctuation graph;

[0015] A5: Analyze the area of ​​the shadow region to determine whether the real-time power line loss value is abnormal.

[0016] As a further solution of the present invention: the specific method of drawing the temperature influence curve diagram is:

[0017] B1: Real-time collection of line temperature;

[0018] B2: Based on the historical data of line temperature and real-time power line loss value, the relationship formula between line temperature and real-time power line loss value is obtained;

[0019] B3: Draw the temperature influence curve according to the relationship formula;

[0020] B4: Analyze the temperature impact curve to come up with corresponding measures.

[0021] As a further solution of the present invention: the specific method for calculating the real-time power line loss value is:

[0022] The active current is marked as IW, the reactive current is marked as IR, and the active current IW and the reactive current IR are processed by the formula: The real-time power line loss value P is obtained, where a1 and a2 are preset proportional factors, and both are greater than 0.

[0023] As a further solution of the present invention: the method for drawing the power line loss fluctuation diagram is:

[0024] Based on the real-time power line loss value and time, a power line loss fluctuation diagram is constructed in the XY two-dimensional coordinate system. In the diagram, X represents time, Y represents the real-time power line loss value, a and b represent the rated power line loss value interval, and the shaded area indicates that the real-time power line loss value exceeds the rated power line loss value.

[0025] As a further solution of the present invention: the specific analysis method for the area of ​​the shadow region is:

[0026] Compare and analyze the shadow area with the shadow threshold area;

[0027] If the shadow area is less than or equal to the shadow area threshold, the real-time power line loss is determined to be normal;

[0028] If the area of ​​the shadow region is greater than the threshold area of ​​the shadow region, the real-time power line loss value is determined to be abnormal.

[0029] As a further solution of the present invention: the specific method for deriving the relationship formula is:

[0030] The historical data of line temperature T and normal real-time power line loss value P are matched one by one, and then compared and analyzed, the relationship between line temperature T and real-time power line loss value P is obtained as follows: P = b1 × T 2 +b2×T+b3, where b1, b2, and b3 are all preset proportional parameters, and are all greater than 0.

[0031] As a further solution of the present invention: the specific method of drawing the temperature influence curve diagram is as follows:

[0032] Based on the relationship formula, a temperature influence curve is constructed in the TP two-dimensional coordinate system. In the figure, T represents the line temperature, P represents the real-time power line loss value, and the point M (T1, P1) indicates that the real-time power line loss value is the minimum P1 when the line temperature is T1.

[0033] As a further solution of the present invention: the measures include one or more of the following solutions:

[0034] (1) Changing the line temperature so that the line temperature approaches the temperature value T1, thereby reducing the power line loss value, wherein changing the line temperature includes: adjusting the line load, replacing the line conductor, changing the line heat dissipation conditions, etc., or one or more of the above;

[0035] (2) Adjust the compensation value of power line loss in time according to the line temperature.

[0036] As a further solution of the present invention: comprising:

[0037] A data acquisition module, the data acquisition module is used to obtain collected data in real time; real-time collection of line temperature;

[0038] A data processing module, the data processing module is used to calculate the real-time power line loss value according to the collected data; and to derive a relationship formula between the line temperature and the real-time power line loss value according to the historical data of the line temperature and the real-time power line loss value;

[0039] A drawing module, the drawing module is used to draw a power line loss fluctuation diagram according to the real-time power line loss value; and draw a temperature influence curve diagram based on a relationship formula;

[0040] The analysis module is used to analyze the power line loss fluctuation diagram to determine whether the real-time power line loss value is abnormal; and to derive corresponding measures according to the temperature impact curve diagram.

[0041] Beneficial effects of the present invention:

[0042] (1) The present invention can more accurately reflect the power line loss situation by collecting data on the line in real time and using algorithms for calculation, thereby improving the accuracy and efficiency of power line loss analysis;

[0043] (2) The present invention combines the historical data of line temperature and power line loss value, analyzes their corresponding relationship, and predicts the real-time power line loss value when the line temperature changes, so as to make corresponding measures and plans, which helps to reduce power line loss, reduce energy waste and environmental pollution, promote energy conservation and emission reduction and sustainable development, improve the power factor of the power system, and make the power system operate more efficiently and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Figure 1 is a flow chart of the method of the present invention;

[0046] Figure 2 It is the power line loss fluctuation diagram in the present invention;

[0047] Figure 3 It is the temperature influence curve diagram of the present invention;

[0048] Figure 4 It is a schematic diagram of the system of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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.

[0050] Embodiment 1:

[0051] See also Figure 1 , Figure 2 As shown, a power line loss analysis method for a power transmission and transformation project according to an embodiment of the present invention includes: obtaining collected data in real time, calculating a real-time power line loss value according to the collected data, processing and analyzing the real-time power line loss value, thereby determining whether the real-time power line loss value is abnormal. The specific method is the following steps:

[0052] Step 1: Collect data on the line in real time to obtain collected data;

[0053] The collected data include: active current and reactive current, and the active current is marked as IW and the reactive current is marked as IR;

[0054] Step 2: Based on the collected data, the real-time power line loss value is calculated by the formula. The specific method is as follows:

[0055] The active current IW and reactive current IR are processed by the formula: Obtain the real-time power line loss value P, where a1 and a2 are preset proportional factors, and both are greater than 0;

[0056] Step 3: Draw a power line loss fluctuation diagram based on the real-time power line loss value, and mark the area exceeding the rated power line loss value as a shaded area. The specific method is as follows:

[0057] Based on the real-time power line loss value and time, a power line loss fluctuation graph is constructed in the XY two-dimensional coordinate system, such as Figure 2 In the figure, X represents time, Y represents real-time power line loss value, a and b represent rated power line loss value intervals, and the shaded area represents that the real-time power line loss value exceeds the rated power line loss value;

[0058] Step 4: Calculate the area of ​​the shaded area in the power line loss fluctuation diagram and mark the area of ​​the shaded area as S;

[0059] Step 5: Analyze the area of ​​the shadow region to determine whether the real-time power line loss value is abnormal. The specific analysis method is as follows:

[0060] Compare and analyze the shadow area S with the shadow area threshold area;

[0061] If the area of ​​the shadow region S is less than or equal to the threshold area of ​​the shadow region, it means that within a certain period of time, the real-time power line loss value does not exceed the rated power line loss range by a large margin, that is, the real-time power line loss value is determined to be normal;

[0062] If the area of ​​the shadow region S>the area of ​​the shadow region threshold, it means that within a certain period of time, the real-time power line loss value exceeds the range of the rated power line loss interval by too much, or the real-time power line loss value exceeds the rated power line loss interval for too long, that is, the real-time power line loss value is determined to be abnormal;

[0063] Embodiment 2:

[0064] Based on Example 1, please refer to Figure 1 , Figure 3 As shown, a power line loss analysis method for a power transmission and transformation project according to an embodiment of the present invention further includes real-time acquisition of line temperature, deducing a relationship formula between line temperature and real-time power line loss value based on historical data of line temperature and real-time power line loss value, and drawing a temperature influence curve diagram based on the relationship formula, thereby obtaining a corresponding measure plan according to the temperature influence curve diagram. The specific method is the following steps:

[0065] Step 1: Collect the line temperature in real time and mark the line temperature as T;

[0066] Step 2: Based on the historical data of line temperature and real-time power line loss value, the relationship formula between line temperature and real-time power line loss value is obtained. The specific method is as follows:

[0067] The historical data of line temperature T and normal real-time power line loss value P are matched one by one, and then compared and analyzed, the relationship between line temperature T and real-time power line loss value P is obtained as follows: P = b1 × T 2 +b2×T+b3, where b1, b2, and b3 are all preset ratio parameters and are all greater than 0;

[0068] Step 3: Draw the temperature influence curve according to the relationship formula. The specific method is:

[0069] Based on the relationship formula, a temperature influence curve diagram is constructed in the TP two-dimensional coordinate system, such as Figure 3 In the figure, T represents the line temperature, P represents the real-time power line loss value, and the point M(T1, P1) indicates that when the line temperature is T1, the real-time power line loss value is the minimum P1;

[0070] Step 4: Analyze the temperature impact curve to obtain the corresponding measures;

[0071] The corresponding measures include one or more of the following:

[0072] (1) Change the line temperature so that the line temperature is close to the T1 temperature value, thereby reducing the power line loss value. Reducing power line loss can reduce energy waste and environmental pollution, promote energy conservation, emission reduction and sustainable development;

[0073] Wherein, changing the line temperature includes: adjusting the line load, replacing the line conductor, changing the line heat dissipation condition, etc., or one or more of the above;

[0074] (2) According to the line temperature, timely adjust and compensate for the power line loss value, thereby improving the power factor of the power system and making the power system operate more efficiently and stably;

[0075] Embodiment three:

[0076] Based on the first and second embodiments, please refer to Figure 1 - Figure 4 As shown, a power line loss analysis system for power transmission and transformation engineering according to an embodiment of the present invention comprises:

[0077] A data acquisition module, which is used to collect data on the line and obtain collected data; real-time collection of line temperature;

[0078] A data processing module, the data processing module is used to calculate the real-time power line loss value through a formula based on the collected data; and to obtain a relationship formula between the line temperature and the real-time power line loss value based on historical data of the line temperature and the real-time power line loss value;

[0079] A drawing module, the drawing module is used to draw a power line loss fluctuation diagram according to the real-time power line loss value, and mark the area exceeding the rated power line loss value as a shaded area; and draw a temperature influence curve diagram according to the relationship formula;

[0080] An analysis module, which is used to analyze the area of ​​the shadow region to determine whether the real-time power line loss value is abnormal; analyze the temperature impact curve diagram to obtain a corresponding measure plan;

[0081] The working principle of the present invention is as follows: data on the line is collected in real time to obtain the collected data; a real-time power line loss value is calculated by a formula based on the collected data; a power line loss fluctuation diagram is drawn based on the real-time power line loss value; an area exceeding the rated power line loss value is marked as a shadow area; the area of ​​the shadow area in the power line loss fluctuation diagram is calculated; the area of ​​the shadow area is compared and analyzed with the threshold area of ​​the shadow area to determine whether the real-time power line loss value is abnormal; if the area of ​​the shadow area is less than or equal to the threshold area of ​​the shadow area, the real-time power line loss value is determined to be normal; if the area of ​​the shadow area is greater than the threshold area of ​​the shadow area, the real-time power line loss value is determined to be abnormal; the line temperature is collected in real time; a relationship formula between the line temperature and the real-time power line loss value is obtained based on historical data of the line temperature and the real-time power line loss value; a temperature influence curve diagram is drawn based on the relationship formula; the temperature influence curve diagram is analyzed to obtain a corresponding measure plan.

[0082] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for analyzing power line losses for power transmission and transformation projects, characterized in that: The specific method includes the following steps: Step 1: obtaining collected data in real time, calculating the real-time power line loss value according to the collected data, drawing a power line loss fluctuation diagram according to the real-time power line loss value, analyzing the power line loss fluctuation diagram, and determining whether the real-time power line loss value is abnormal, wherein the collected data includes: active current and reactive current; Step 2: Collect line temperature in real time, and derive the relationship formula between line temperature and real-time power line loss value based on historical data of line temperature and real-time power line loss value. Draw a temperature impact curve based on the relationship formula, and then derive corresponding measures based on the temperature impact curve.

2. A method for analyzing power line losses for power transmission and transformation projects according to claim 1, characterized in that: The specific method for determining whether the real-time power line loss value is abnormal is: A1: Collect data on the line in real time and obtain collected data; A2: Based on the collected data, the real-time power line loss value is calculated by formula; A3: Draw a power line loss fluctuation graph based on the real-time power line loss value, and mark the area exceeding the rated power line loss value as a shaded area; A4: Calculate the area of ​​the shaded region in the power line loss fluctuation graph; A5: Analyze the area of ​​the shadow region to determine whether the real-time power line loss value is abnormal.

3. A method for analyzing power line losses for power transmission and transformation engineering according to claim 1, characterized in that: The specific method of drawing the temperature influence curve diagram is: B1: Real-time collection of line temperature; B2: Based on the historical data of line temperature and real-time power line loss value, the relationship formula between line temperature and real-time power line loss value is obtained; B3: Draw the temperature influence curve according to the relationship formula; B4: Analyze the temperature impact curve to come up with corresponding measures.

4. A method for analyzing power line losses for power transmission and transformation projects according to claim 2, characterized in that: The specific method for calculating the real-time power line loss value is: The active current is marked as IW, the reactive current is marked as IR, and the active current IW and the reactive current IR are processed by the formula: , obtain the real-time power line loss value P, where and is the preset scale factor, and Greater than 0.

5. The power line loss analysis method for power transmission and transformation engineering according to claim 2, characterized in that: The method for drawing the power line loss fluctuation diagram is as follows: Based on the real-time power line loss value and time, a power line loss fluctuation diagram is constructed in the XY two-dimensional coordinate system. In the diagram, X represents time, Y represents the real-time power line loss value, a and b represent the rated power line loss value interval, and the shaded area indicates that the real-time power line loss value exceeds the rated power line loss value.

6. A method for analyzing power line losses for power transmission and transformation projects according to claim 2, characterized in that: The specific analysis method for the area of ​​the shadow region is: Compare and analyze the shadow area with the shadow threshold area; If the shadow area is less than or equal to the shadow area threshold, the real-time power line loss is determined to be normal; If the area of ​​the shadow region is greater than the threshold area of ​​the shadow region, the real-time power line loss value is determined to be abnormal.

7. A method for analyzing power line losses for power transmission and transformation projects according to claim 3, characterized in that: The specific method for obtaining the relationship formula is: By matching the historical data of line temperature T and normal real-time power line loss value P one by one and then performing comparative analysis, the relationship formula between line temperature T and real-time power line loss value P is obtained as follows: ,in All are preset ratio parameters, and all are greater than 0.

8. A method for analyzing power line losses for power transmission and transformation projects according to claim 3, characterized in that: The specific method of drawing the temperature influence curve diagram is as follows: Based on the relationship formula, a temperature impact curve is constructed in the TP two-dimensional coordinate system. In the figure, T represents the line temperature, P represents the real-time power line loss value, and M ( ) point indicates that when the line temperature is The minimum real-time power line loss is .

9. A method for analyzing power line losses for power transmission and transformation engineering according to claim 3, characterized in that: The measures include: (1) Change the line temperature so that the line temperature is close to Temperature value, thereby reducing the power line loss value, wherein changing the line temperature includes: adjusting the line load, replacing the line conductor, changing the line heat dissipation condition, etc., one or more; (2) Adjust the compensation value of power line loss in time according to the line temperature.

10. A power line loss analysis system for power transmission and transformation engineering, characterized by: include: A data acquisition module, wherein the data acquisition module is used to obtain collected data in real time; Real-time collection of line temperature; A data processing module, the data processing module is used to calculate the real-time power line loss value according to the collected data; and to derive a relationship formula between the line temperature and the real-time power line loss value according to the historical data of the line temperature and the real-time power line loss value; A drawing module, the drawing module is used to draw a power line loss fluctuation diagram according to the real-time power line loss value; Draw a temperature influence curve based on the relationship formula; An analysis module, the analysis module is used to analyze the power line loss fluctuation diagram to determine whether the real-time power line loss value is abnormal; According to the temperature impact curve, the corresponding measures are drawn up.

Images