A method for analyzing deicing effectiveness of an overhead power transmission line

Abstract

The application relates to the technical field of power systems and maintenance thereof, and discloses an overhead power transmission line deicing effect analysis method, which comprises the following steps: determining a deicing mode of a power transmission line, wherein the deicing mode comprises manual deicing, unmanned aerial vehicle deicing and air cannon bomb deicing; according to the deicing mode, a calculation formula of deicing operation input cost, deicing operation personnel input quantity and equipment input quantity is determined; based on preset conditions, deicing operation personnel standard input quantity A and deicing equipment standard input quantity B of the three deicing modes are obtained through investigation and analysis measurement; deicing operation input quantity F and deicing equipment input quantity Q calculated through the formula are used to calculate deicing operation input cost M; the overhead power transmission line deicing effect analysis method can accurately calculate the required resources and cost under different conditions through the utilization of standard input quantity and an adjustment coefficient, so that the deicing operation process is optimized, the operation efficiency is improved, and the operation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems and maintenance thereof, and in particular to a method for analyzing the effectiveness of deicing of overhead transmission lines. Background Art

[0002] In recent years, extreme rain, snow and freezing weather have increased, and icing on overhead transmission lines has become more and more serious, leading to an increase in icing failures. Carrying out de-icing operations on overhead transmission lines is an effective measure to prevent icing failures. At present, the main de-icing methods adopted in power grids include manual de-icing, drone de-icing and air shell de-icing. The cost investment and de-icing efficiency of various de-icing methods are affected by many factors. It is difficult for operation and maintenance management departments to accurately estimate the manpower and material resources required for de-icing work, and thus it is impossible to formulate a scientific, economical and reasonable de-icing operation plan; there is currently a lack of a method to effectively analyze and estimate the effectiveness of de-icing of overhead transmission lines. Therefore, establishing an analysis method for the de-icing effectiveness of overhead transmission lines will help operation and maintenance management personnel to relatively accurately estimate de-icing investment and select appropriate de-icing methods, thereby providing a scientific and reliable decision-making basis for operation and maintenance management personnel to carry out de-icing work, which is of great significance to the anti-icing and disaster reduction work of the power grid. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a method for analyzing the effectiveness of deicing of overhead transmission lines, which solves the problems of being difficult to accurately estimate the manpower and material resources required for deicing work and being unable to formulate a scientific, economical and reasonable deicing operation plan.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for analyzing the effectiveness of deicing of overhead transmission lines, characterized by comprising the following steps:

[0005] (1) Determine the deicing method for overhead transmission lines, including manual deicing, drone deicing, and air cannon deicing;

[0006] (2) Based on the deicing method, the calculation formulas for the deicing operation cost, the number of deicing operation personnel, and the amount of deicing equipment are determined, wherein the calculation formulas for the deicing operation cost, the number of deicing operation personnel, and the amount of deicing equipment are respectively:

[0007]

[0008] F=I×L×A 【2】

[0009] Q=I×L×B 【3】

[0010] Wherein, M: de-icing operation investment cost, ten thousand yuan;

[0011] M f : De-icing workers' expenses, RMB 10,000 / man-day;

[0012] M q : De-icing equipment cost, RMB 10,000 per set;

[0013] M x : Additional cost of de-icing, 10,000 yuan;

[0014] F: De-icing operation personnel input, man-days;

[0015] Q: De-icing equipment investment, set*day;

[0016] A: Baseline input of de-icing workers, man-days / km;

[0017] B: Baseline investment in de-icing equipment, set*day / km;

[0018] N: service life of de-icing equipment, days;

[0019] L: deicing line length, km;

[0020] I: adjustment coefficient;

[0021] (3) Based on the preset conditions, the baseline input amount A of de-icing workers and the baseline input amount B of de-icing equipment for the three de-icing methods were calculated through investigation and analysis. The preset conditions include single circuit 35kV

[0022] Lines and conductors are single-split, on flat ground, with an ice thickness of 5mm and rime as the ice type;

[0023] (4) According to the influence of voltage level, number of loops, number of conductor splits, terrain, ice thickness and ice type on de-icing efficiency, the de-icing efficiency in various situations is corrected by adjusting the coefficient I;

[0024] (5) The de-icing operation personnel input F and de-icing equipment input Q calculated by formulas [2] and [3] are used to calculate the de-icing operation input cost M by formula [1];

[0025] (6) Based on the calculated de-icing personnel input F, de-icing equipment input Q, de-icing operation cost M, personnel and equipment reserves, and de-icing time requirements, etc., select the appropriate de-icing method and the input of de-icing personnel and equipment.

[0026] Optionally, the determination of the adjustment coefficient I needs to consider the voltage level adjustment coefficient I1, the number of loops adjustment coefficient I2, the number of conductor splits adjustment coefficient I3, the terrain type adjustment coefficient I4, the ice thickness adjustment coefficient I5 and the ice type adjustment coefficient I6. The calculation formula of the adjustment coefficient I is:

[0027] I=I1I2I3I4I5I6【4】。

[0028] Optionally, the de-icing personnel fee M f , de-icing equipment cost M q The specific value of the de-icing equipment service life N is determined based on actual market research and equipment usage.

[0029] Optionally, when calculating the de-icing operation cost M, if there are additional special expenses M x , and incorporate it into the calculation to improve the accuracy of fee calculation.

[0030] Optionally, the method is applicable to deicing effectiveness analysis of ground wires of 35kV to 500kV overhead transmission lines in operation when deicing is performed using three deicing methods: manual deicing, drone deicing, and air shell deicing.

[0031] The present invention provides a method for analyzing the effectiveness of deicing of overhead transmission lines, which has the following beneficial effects:

[0032] By confirming the basic conditions of the routes requiring deicing, the present invention can quickly estimate the deicing personnel, deicing equipment, and total deicing costs required under the three deicing methods of manual deicing, drone deicing, and air shell deicing. Operation and maintenance managers can comprehensively consider the calculated investment amount, personnel and equipment reserves, and deicing time requirements to select the appropriate deicing method and the amount of deicing personnel and equipment investment, providing a scientific and reliable decision-making basis for carrying out deicing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A de-icing operation plan flow chart is developed for the present invention. DETAILED DESCRIPTION

[0034] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0035] See also Figure 1 The present invention provides a technical solution: a method for analyzing the effectiveness of deicing of overhead transmission lines, characterized by comprising the following steps:

[0036] (1) Determine the deicing method for overhead transmission lines, including manual deicing, drone deicing, and air cannon deicing;

[0037] (2) Based on the deicing method, the calculation formulas for the deicing operation cost, the number of deicing operation personnel, and the amount of deicing equipment are determined, wherein the calculation formulas for the deicing operation cost, the number of deicing operation personnel, and the amount of deicing equipment are respectively:

[0038]

[0039] F=I×L×A 【2】

[0040] Q=I×L×B 【3】

[0041] Wherein, M: de-icing operation investment cost, ten thousand yuan;

[0042] M f : De-icing workers' expenses, RMB 10,000 / man-day;

[0043] M q : De-icing equipment cost, RMB 10,000 per set;

[0044] M x : Additional cost of de-icing, 10,000 yuan;

[0045] F: De-icing operation personnel input, man-days;

[0046] Q: De-icing equipment investment, set*day;

[0047] A: Baseline input of de-icing workers, man-days / km;

[0048] B: Baseline investment in de-icing equipment, set*day / km;

[0049] N: service life of de-icing equipment, days;

[0050] L: deicing line length, km;

[0051] I: adjustment coefficient;

[0052] (3) Based on the preset conditions, the baseline input amount A of de-icing workers and the baseline input amount B of de-icing equipment for the three de-icing methods were calculated through investigation and analysis. The preset conditions include single circuit 35kV

[0053] The lines and conductors are single-split, flat-bottomed, with an ice thickness of 5mm and rime ice.

[0054] (4) According to the influence of voltage level, number of loops, number of conductor splits, terrain, ice thickness and ice type on de-icing efficiency, the de-icing efficiency in various situations is corrected by adjusting the coefficient I;

[0055] (5) The de-icing operation personnel input F and de-icing equipment input Q calculated by formulas [2] and [3] are used to calculate the de-icing operation input cost M by formula [1];

[0056] (6) Based on the calculated de-icing personnel input F, de-icing equipment input Q, de-icing operation cost M, personnel and equipment reserves, and de-icing time requirements, etc., select the appropriate de-icing method and the input of de-icing personnel and equipment.

[0057] Based on the conditions of a single-circuit 35 kV line, single-split conductors, flat ground, 5 mm ice thickness, and rime ice, the benchmark investment amounts for the three de-icing methods were calculated through research and analysis, as shown in Table 1.

[0058] Table 1: Baseline inputs

[0059]

[0060] The determination of the adjustment coefficient I needs to consider the voltage level adjustment coefficient I1, the loop number adjustment coefficient I2, the conductor split number adjustment coefficient I3, the terrain type adjustment coefficient I4, the ice thickness adjustment coefficient I5 and the ice type adjustment coefficient I6. The calculation formula of the adjustment coefficient I is:

[0061] I=I1I2I3I4I5I6【4】。

[0062] Voltage level, number of circuits, number of conductor splits, terrain, ice thickness, and ice type have a significant impact on de-icing efficiency. Adjustment coefficients are used to correct the de-icing efficiency in various situations. The adjustment coefficients of the various influencing factors for the three de-icing methods are calculated through research and analysis, as shown in Tables 2 to 7.

[0063] Table 2: Voltage level adjustment coefficient I1

[0064]

[0065] Table 3: Loop number adjustment coefficient I2

[0066]

[0067] Table 4: Wire Split Number Adjustment Factor I3

[0068]

[0069] Table 5: Terrain type adjustment coefficient I4

[0070]

[0071] Table 6: Ice thickness adjustment factor I5

[0072]

[0073] Table 7: Icing type adjustment factor I6

[0074]

[0075]

[0076] The de-icing personnel cost Mf , de-icing equipment cost M q The specific value of the de-icing equipment service life N is determined based on actual market research and equipment usage.

[0077] In actual application, the de-icing personnel cost M f , de-icing equipment cost M q The determination of the service life N of de-icing equipment requires comprehensive consideration of factors such as market conditions, equipment performance, maintenance costs, and operator skill levels. For example, for de-icing operator costs M f , it is necessary to make a comprehensive assessment based on factors such as the average wage level in the region, the difficulty of the operation, and the operating environment. q It is necessary to consider the equipment's purchase cost, operation and maintenance costs, depreciation rate, etc. The service life N of the de-icing equipment is related to the equipment's material, design life, and actual frequency and intensity of use.

[0078] When calculating the de-icing operation cost M, if there are additional special expenses M x , and incorporate it into the calculation to improve the accuracy of fee calculation.

[0079] The method is applicable to the deicing effectiveness analysis of the ground wires of 35kV to 500kV overhead transmission lines in operation when three deicing methods are used: manual deicing, drone deicing, and air shell deicing.

[0080] In this embodiment, the de-icing operation cost M, the de-icing operation personnel cost M f , de-icing equipment cost M q , the service life of the de-icing equipment N and possible special expenses M x By taking factors such as the impact of the impact of the impact on the power transmission line into consideration, the de-icing effectiveness of different de-icing methods can be quantitatively analyzed. Through comparative analysis, it is possible to assess which de-icing method performs better in terms of economy, efficiency, and safety under specific conditions, providing scientific decision-making support for de-icing operations on power transmission lines.

[0081] The specific implementation steps of the present invention are as follows:

[0082] (1) Determine the baseline de-icing personnel input (A) and the baseline de-icing equipment input (B) based on the de-icing method to be used, referring to Table 1;

[0083] (2) Confirm the voltage level, number of circuits, number of splits, terrain type, ice thickness and ice type of the line that needs deicing, and confirm the adjustment coefficients respectively according to Tables 2 to 7;

[0084] (3) Calculate the adjustment coefficient I by referring to formula [4] based on the values ​​of the adjustment coefficients confirmed in step (2);

[0085] (4) Based on the values ​​of A, B, and I calculated and determined in steps (1) and (3), and in combination with the length L of the deicing line required, the deicing personnel input F is calculated using formula [2], and the deicing equipment input Q is calculated using formula (3);

[0086] (5) Using the F and Q values ​​calculated in step (4), calculate the de-icing operation cost M using formula [1].

[0087] By calculating the de-icing operation personnel input F, de-icing equipment input Q and de-icing operation investment cost M, combined with the de-icing personnel and equipment reserves, the total de-icing investment cost is considered to be optimal while meeting the de-icing time requirements, so as to reasonably formulate the de-icing operation plan.

[0088] This embodiment uses a line voltage level of 220kV, double circuit, two split conductors, hilly terrain, line ice thickness of 10mm, mixed ice type, and a deicing line length of 5km as an example to specifically illustrate the implementation method.

[0089] According to the deicing conditions of the line, refer to Tables 2 to 7 to determine the value of the adjustment coefficient I. The coefficients are as follows:

[0090] Table 8: Values ​​of adjustment coefficient I

[0091]

[0092] According to Table 1 and Table 8 and the line length of 5 km, the de-icing personnel input F and de-icing equipment input Q under different de-icing methods are calculated. The calculation results are as follows:

[0093] Table 9: Calculation results of de-icing personnel input F and de-icing equipment input Q

[0094]

[0095] Assume the following pricing principles for this example: labor costs are 1,120 RMB per man-day; manual de-icing equipment is 15,000 RMB per set, with a lifespan of 5 years, 1,825 days; drone de-icing equipment is 200,000 RMB per set, with a lifespan of 2 years, 730 days; and air ammunition de-icing equipment is 30,000 RMB per set, with a lifespan of 3 years, 1,095 days. Other expenses include safety measures costs of 10,000 RMB.

[0096] Based on the assumed charging principle, the cost input M for manual de-icing, drone de-icing, and empty shell de-icing is calculated. The calculation results are as follows:

[0097] Table 10: Cost of three de-icing methods M

[0098] Artificial de-icing Drone de-icing Empty shell de-icing De-icing costs (10,000 yuan) 5.84 2.16 5.52

[0099] Based on the comparison of personnel input in Table 9 and de-icing costs in Table 10, de-icing operations can be planned according to different situations. The following three cases are given as examples:

[0100] ①1① If there are sufficient de-icing personnel and various de-icing equipment, drone de-icing should be given priority as the lowest-cost de-icing method.

[0101] ② If there are only 50 de-icing personnel, the minimum de-icing time required for each de-icing method can be calculated, and the corresponding number of de-icing equipment needs to be configured. The specific data is as follows:

[0102] Table 11: Minimum de-icing time and minimum number of de-icing equipment required for the three de-icing methods

[0103] Minimum de-icing time (per day) Minimum number of de-icing equipment (sets) Artificial de-icing 8.61 2.49 Drone de-icing 1.15 16.41 Empty shell de-icing 7.61 12.50

[0104] ③ If de-icing is required to be completed within 4 hours (0.5 days) to ensure power supply, the minimum number of personnel and de-icing equipment required for each de-icing method can be calculated based on the total de-icing operation investment F and Q. The specific data is as follows:

[0105] Table 12: Personnel and equipment input

[0106]

[0107] Select the appropriate de-icing method based on the personnel and equipment reserves. For example, if there is sufficient personnel reserve, but insufficient drone de-icing and air shell de-icing equipment, and sufficient manual de-icing equipment, manual de-icing can be selected after comprehensive consideration. The number of de-icing personnel should be no less than 861 and the number of de-icing equipment should be no less than 43 sets.

[0108] By confirming the basic conditions of the routes requiring deicing, the present invention can quickly estimate the deicing personnel, deicing equipment, and total deicing investment costs required under the three deicing methods of manual deicing, drone deicing, and empty shell deicing. Operation and maintenance management personnel can comprehensively consider the calculated investment amount, personnel and equipment reserves, and deicing time requirements to select an appropriate deicing method and the investment in deicing personnel and equipment, thereby providing a scientific and reliable decision-making basis for carrying out deicing work.

[0109] Finally, it should be noted that, in this document, relational terms such as first and second are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the process, method, article, or device comprising the element. The above detailed description of the specific embodiments provided by the present invention is provided. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is intended only to facilitate understanding of the methods and core concepts of the present invention. At the same time, those skilled in the art will appreciate that, based on the principles of the present invention, variations in the specific implementation methods and scope of application are possible. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A method for analyzing the effectiveness of deicing of overhead transmission lines, characterized in that: The following steps are involved: (1) Determine the deicing method for overhead transmission lines, including manual deicing, drone deicing, and aerial shell deicing; (2) Based on the de-icing method, determine the calculation formulas for the de-icing operation cost, the number of de-icing operation personnel, and the number of de-icing equipment inputs, wherein the calculation formulas for the de-icing operation cost, the number of de-icing operation personnel, and the number of de-icing equipment inputs are: 【1】 【2】 【3】 Wherein, M: de-icing operation investment cost, ten thousand yuan; M f : De-icing workers' expenses, RMB 10,000 / man-day; M q : De-icing equipment cost, RMB 10,000 per set; M x : Additional costs for de-icing, 10,000 yuan; F: De-icing operation personnel input, man-days; Q: De-icing equipment investment, set*day; A: Baseline input of de-icing workers, man-days / km; B: Baseline investment in de-icing equipment, set*day / km; N: service life of de-icing equipment, days; L: length of deicing line, km; I: adjustment coefficient; (3) Based on the preset conditions, the baseline input amount A of de-icing workers and the baseline input amount B of de-icing equipment for the three de-icing methods were calculated through investigation and analysis. The preset conditions included a single-circuit 35kV line, a single split conductor, flat ground, an ice thickness of 5mm, and an ice type of rime; (4) According to the influence of voltage level, number of loops, number of conductor splits, terrain, ice thickness and ice type on de-icing efficiency, the de-icing efficiency in various situations is corrected by adjusting the coefficient I; (5) The de-icing personnel input F and de-icing equipment input Q are calculated using formulas [2] and [3], and the de-icing operation cost M is calculated using formula [1]; (6) Based on the calculated de-icing personnel input F, de-icing equipment input Q, de-icing operation cost M, personnel and equipment reserves, and de-icing time requirements, select the appropriate de-icing method and the input of de-icing personnel and equipment.

2. The method for analyzing the deicing effectiveness of overhead transmission lines according to claim 1, characterized in that: The determination of the adjustment coefficient I needs to consider the voltage level adjustment coefficient I1, the loop number adjustment coefficient I2, the conductor split number adjustment coefficient I3, the terrain type adjustment coefficient I4, the ice thickness adjustment coefficient I5 and the ice type adjustment coefficient I6. The calculation formula of the adjustment coefficient I is: 【4】。 3. The method for analyzing the deicing effectiveness of overhead transmission lines according to claim 1, wherein: The de-icing personnel cost M f , de-icing equipment cost M q The specific value of the de-icing equipment service life N is determined based on actual market research and equipment usage.

4. The method for analyzing the deicing effectiveness of overhead transmission lines according to claim 1, wherein: When calculating the de-icing operation cost M, if there are additional special expenses M x , and incorporate it into the calculation to improve the accuracy of fee calculation.

5. The method for analyzing the effectiveness of deicing of overhead transmission lines according to claim 1, wherein: The method is applicable to the deicing effectiveness analysis of the deicing of the ground wire of the 35kV to 500kV overhead transmission lines in operation using three deicing methods: manual deicing, drone deicing, and air shell deicing.

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