CN-122019958-A - Power transmission line wire deicing jump height calculation method and device based on hardware slipping condition, storage medium and electronic equipment

Abstract

The application provides a method, a device, a storage medium and electronic equipment for calculating the deicing jump height of a power transmission line wire based on a hardware slipping condition, and relates to the technical field of power engineering; judging whether the wire slides according to unbalanced tension acting on two sides of the suspension insulator string at the moment of ice removal, calculating new sag after the sliding is judged to occur, calculating a hardware sliding correction coefficient based on the new sag and the wire state parameters, and calculating the finally corrected jump height based on the hardware sliding correction coefficient. The method improves the accuracy of the ice-removing jump amplitude prediction of the power transmission line, and provides more reliable basis for line design, anti-icing measures and operation maintenance.

Inventors

• LIANG MING
• SHENG DAOWEI
• LUO MING
• WANG JUNCHENG
• CAO LIWEI
• TANG DAIJUN
• MO LIXI
• XIONG KANG
• XIONG GAOLIN
• LI LIANG
• XU WENJIE
• XIE JING
• LIU JIONG
• ZENG WENHUI
• MA HAIYUN
• HAN DAGANG
• HU QUAN

Assignees

• 中国电力工程顾问集团西南电力设计院有限公司

Dates

Publication Date

20260512

Application Date

20260415

Claims (10)

1. 1. The method for calculating the deicing jump height of the electric wire of the power transmission line based on the hardware slipping condition is characterized by comprising the following steps of: According to the design parameters of the power transmission line, calculating the state parameters of the wires of the ice removing gear and the adjacent non-ice removing gear under the most serious uneven ice coating working condition; judging whether the wire slides or not according to unbalanced tension acting on two sides of the suspension insulator string at the moment of ice removal; when the sliding is judged to occur, calculating a new sag after the sliding occurs; Calculating a hardware slip correction coefficient based on the new sag and the wire state parameters; And calculating the final corrected jump height based on the hardware slip correction coefficient.
2. 2. The method of claim 1, wherein calculating the wire status parameters of the de-icing stage and the adjacent non-de-icing stage under the most severe non-uniform icing condition according to the transmission line design parameters comprises: acquiring design parameters of a power transmission line, including a span, a wire model, design meteorological conditions, an insulator string model and length and a design grip of a suspension clamp; based on the design parameters, calculating the wire state parameters of the ice removing gear and the adjacent non-ice removing gear under the worst uneven ice coating working condition, including: calculating sag f_ice and horizontal tension T_ice after ice-removing and ice-covering; calculating sag f_adj_ice and horizontal tension T_adj_ice after ice coating of adjacent gears; calculating bare conductor sag f_bare and horizontal tension T_bare after ice removal of an ice removing gear; The original sag difference, Δf=f_ice-f_bare, is calculated.
3. 3. The method of claim 2, wherein determining whether the conductor is slipping based on the unbalanced tension forces acting on both sides of the string of hanging insulators at the moment of de-icing, comprises: calculating unbalanced tension delta T applied to two sides of the suspension insulator string at the moment of deicing based on the wire state parameters; Comparing the unbalanced tension deltat with a designed grip Fg of the suspension clamp; if delta T is less than or equal to Fg, judging that the wire cannot slip; if DeltaT > Fg, it is determined that the wire will slip.
4. 4. A method according to claim 3, wherein said calculating new sag after slipping comprises: Solving the slippage through iterative calculation; obtaining the length of the ice removing gear wire after sliding based on the sliding amount; Calculating sag of ice coating state of ice removing gear based on length of wire And sag in bare wire state 。
5. 5. The method of claim 4, wherein solving for the slip amount by iterative computation comprises: Assuming a slip amount delta L_slip, calculating the wire length of the new ice-removing gear and the wire length of the new adjacent gear based on the slip amount delta L_slip; Based on the wire length of the new deicing gear and the wire length of the new adjacent gear, recalculating the bare wire tension T '_bare of the deicing gear and the icing wire tension T' _adj_ice of the adjacent gear by using a wire state equation; the value of Δl_slip is adjusted, and the calculation is repeated until the convergence condition |t '_adj_ice-T' _bare|=fg is satisfied.
6. 6. The method of claim 5, wherein calculating a hardware slip correction factor based on the new sag and wire state parameters comprises: Calculating corrected sag difference based on new sag after sliding : ; Calculating corrected sag difference The ratio of the initial sag difference delta f and the hardware fitting slip correction coefficient : 。
7. 7. The method of claim 6, wherein the calculating the final corrected jump height based on the hardware slip correction factor comprises: Acquiring hardware sliding correction coefficient The final corrected jump height H' is calculated using the raw sag difference Δf: H'=k 1 ×K×Δf=( /Δf)×K×Δf=K× ; Where K is a coefficient.
8. 8. The utility model provides a transmission line electric wire deicing jump height calculation device based on gold utensil slides under condition which characterized in that includes: The first calculation unit is used for calculating wire state parameters of the ice removing gear and the adjacent non-ice removing gear under the most serious uneven ice coating working condition according to the design parameters of the power transmission line; The judging unit is used for judging whether the wire slides or not according to unbalanced tension acted on two sides of the suspension insulator string at the moment of ice removal; the second calculating unit is used for calculating new sag after the sliding when the sliding is judged to occur; the third calculation unit is used for calculating a hardware fitting slip correction coefficient based on the new sag and the wire state parameters; And a fourth calculation unit for calculating the final corrected jump height based on the hardware slip correction coefficient.
9. 9. A computer readable storage medium, characterized in that the storage medium has stored therein computer instructions, which when run on a computer, cause the computer to perform the method of any of claims 1-7.
10. 10. An electronic device is characterized by comprising a memory and a processor; The memory is used for storing computer instructions; the processor configured to invoke computer instructions stored in the memory, to cause the electronic device to perform the method of any of claims 1-7.

Description

Power transmission line wire deicing jump height calculation method and device based on hardware slipping condition, storage medium and electronic equipment Technical Field The application relates to the technical field of power engineering, in particular to a method and a device for calculating wire deicing jump height of a power transmission line based on hardware slippage, a storage medium and electronic equipment. Background After the wire is covered with ice in winter, when the air temperature rises or is disturbed by external force, the covered ice on the wire can fall off unevenly or instantaneously, so that the wire suddenly releases due to the stored strain energy to generate a severe upward jump, namely an ice-removing jump. The jump can cause the inter-phase and insufficient air gaps of the wires to the ground and the lightning conductor, thereby causing severe accidents such as inter-phase short circuit, flashover grounding and the like and seriously threatening the safe and stable operation of the power grid. In order to assess the risk of ice-shedding hops and guide line design, the engineering community needs to accurately predict the maximum height (amplitude) of the wire ice-shedding hops. Currently, in engineering design practice, simplified empirical formula (1) is widely adopted: H=K×Δf the wire ice removing device comprises a wire, a wire and a wire, wherein H is the maximum ice removing jump height of the wire, m, K is a coefficient, generally 1.75-1.9 is taken, and Deltaf is the sag difference of the wire before and after ice removing in a static state in the same span, and m. The simplified formula is simple and convenient to calculate, has definite physical meaning, and can better estimate the jump amplitude under certain conditions, so that the method is widely applied. However, this simplified formula has an important premise that the wire is stationary at the suspension clamp during de-icing, and the wire length in the span remains unchanged. However, in actual engineering, due to the relief of the terrain, the mountain potential is blocked, ice coating is uneven among gears or even in one gear, and unbalanced tension can be generated between adjacent gears. When this unbalanced tension exceeds the grip of the suspension clamp on the wire, the wire will slip within the suspension clamp. The wire slides from the side with smaller tension (the ice coating smaller gear) to the side with larger tension (the ice coating larger gear), so that the length of the actual wire of the ice coating larger gear is increased, the sag is increased, the tension is reduced, and the slip stops until the tension difference between the two gears is smaller than the allowable grip force value of the suspension clamp. This slipping phenomenon changes the initial energy state of the ice-breaking jump. The original Δf is calculated based on the assumption that the length of the wire is unchanged, and sag change caused by slippage is not reflected, so that the jump height H calculated directly by using the formula (1) can deviate from the actual situation by a certain degree. The lack of a correction method capable of conveniently accounting for the sliding effect of the hardware fitting in the prior art leads to insufficient accuracy of deicing jump analysis and leaves hidden trouble for line safety. Disclosure of Invention The embodiment of the application provides a method and a device for calculating the deicing jump height of a power transmission line wire based on hardware slipping, a storage medium and electronic equipment, and aims to overcome the defect that in the prior art, a simplified formula does not consider suspension clamp slipping to cause inaccurate calculation. Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application. According to a first aspect of an embodiment of the present application, there is provided a method for calculating an ice-removing jump height of an electric wire of an electric transmission line under a condition of hardware slippage, including: According to the design parameters of the power transmission line, calculating the state parameters of the wires of the ice removing gear and the adjacent non-ice removing gear under the most serious uneven ice coating working condition; judging whether the wire slides or not according to unbalanced tension acting on two sides of the suspension insulator string at the moment of ice removal; when the sliding is judged to occur, calculating a new sag after the sliding occurs; Calculating a hardware slip correction coefficient based on the new sag and the wire state parameters; And calculating the final corrected jump height based on the hardware slip correction coefficient. In some embodiments of the present application, based on the foregoing solutions, the calculating, according to the transmission line design parameters, the wi