Method for determining sleeting jump height of continuous span transmission line
A technology for deicing jumping and power transmission lines, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of not considering the impact of deicing jumping height, etc., and achieve the effect of reducing large-scale power outages
Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +1
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[0004] The calculation formula of the de-icing jump height of the overhead line only considers the influence of the sag difference on the de-icing jump height, and does not consider the influence of the de-icing and non-de-icing gear spans on the de-icing jump height
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Embodiment 1
[0045] like Figure 1-3 As shown, the method for determining the de-icing jump height of the continuous transmission line of this example is applicable to 800 kV overhead high-voltage transmission lines; the method considers the sag difference, the de-icing span and the non-deicing The influence of the three factors of the span on the height of the ice-off jump; the method includes the following steps:
[0046] (1) Measure the parameters of the continuous transmission line on site;
[0047] (2) Determine the deicing jump height H' by modeling;
[0048] (3) linear fitting to the deicing jump height H';
[0049] (4) Determine the deicing jump height H.
[0050] The parameters in the step (1) include the distance L of the deicing gear 1 , non-icing gear span L 2 , Sag F when the wire is not covered with ice 1 and conductor icing back sag F 2 .
[0051] The step (2) is modeled according to the parameters in the step (1) by finite element software.
[0052] The parameters ...
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The invention relates to a method for determining the sleeting jump height of a continuous span transmission line. The method is suitable for an 800-kilovolt overhead high-voltage transmission line. Effects on the sleeting jump height caused by a sag difference value, a sleeting span length and a non-sleeting span length are considered in the method. The method comprises the following steps of measuring parameters of the continuous span transmission line on site; determining a sleeting jump height H' through modeling; performing linear fitting on the sleeting jump height H'; determining a sleeting jump height H. According to the method, the sleeting jump height of the continuous span transmission line is computed by means of continuous span length correction factors and the sag difference value between sag obtained in ice loading and sag obtained after ice unloading, and the sleeting span length and the non-sleeting span length are considered in the continuous span length correction factors. The computing method is mainly used for computing the sleeting jump height of the 800-kilovolt continuous span transmission line and has reference significance in computing the sleeting jump height under the working conditions.
Description
Technical field: [0001] The invention relates to a method for determining the deicing jump height of a transmission line, and more particularly to a method for determining the deicing jump height of a continuous transmission line. Background technique [0002] As one of the common types of icing disaster accidents, deicing jump will cause major damage to transmission lines. When the temperature rises, or the action of natural wind, or artificial vibration knocks, the ice-coated conductor will produce uneven deicing or deicing in different periods, causing the deicing of the conductor to jump. De-icing not only affects the re-icing process of the wires, but also causes electrical or mechanical accidents that are very harmful to the wires due to sudden changes in the instantaneous tension and violent jumps of the wires. Therefore, it is of great practical significance to calculate and analyze the deicing jump of conductors for the reliability and economy of the safe operation...
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IPC IPC(8): G06F19/00G06F17/50
Inventor 苏志钢王旭明吴静杨靖波
Owner STATE GRID CORP OF CHINA