Method for measuring sag of flexible conductor in transformer substation

Abstract

The invention relates to a method for measuring the sag of a flexible conductor in a transformer substation. The method is technically characterized by comprising the following steps of measuring theshadow lengths l1 and l2 of two conductor frameworks on the horizontal ground; measuring the length l0 of the ground shadow of the marker post between the two lead framework grounds; measuring to obtain the length l3 of C2C3; and according to a parallel light principle, obtaining tan alpha1 = tan alpha2 = tan alpha3 = tan alpha0 = 10 / h0 = 11 / h1 = 12 / h2 = 13 / h3, and calculating the sag of the flexible conductor in the transformer substation according to the tan alpha1 = tan alpha2 = tan alpha3 = tan alpha0 = 10 / h0 = 11 / h1 = 12 / h2 = 13 / h3. According to the method, the design is reasonable, the sag of the flexible conductor in the transformer substation is indirectly measured by utilizing a parallel light principle, and under the condition that the span and the framework height of the flexible conductor are unknown and electrified, the function of quickly and accurately measuring the sag of the flexible conductor in the transformer substation is realized, the operation state of the flexible conductor can be grasped timely, the safe and reliable operation of a device is guaranteed, and the method has the advantages of being simple and convenient to operate, being small in measurement error, being not affected by the live-line safety distance, and can be widely used for the sag measurement of the flexible conductor with the span smaller than 100m.

Description

technical field [0001] The technical field of substations of the present invention relates to soft wires in substations, in particular to a method for measuring the sag of soft wires in substations. Background technique [0002] The vertical distance between the lowest point on the conductor and the line connecting the suspension point is called the sag of the conductor. After long-term operation of the wire, the sag becomes larger due to reasons such as initial elongation (plastic elongation and creep elongation). If the sag does not meet the design requirements, it is easy to cause accidents such as short circuit or tower collapse. [0003] During the operation of the substation, sag measurement is an important means to check the operation status of the soft conductor in the substation. The current methods of measuring the sag of soft conductors in substations are mainly divided into two methods: blackout measurement, or live measurement using laser rangefinders, theodol...

AI Technical Summary

Problems solved by technology

[0004] The power outage measurement method is easy to operate and has high accuracy, but after the substation is put into operation, it is difficult to carry out effectively due to the influence of the power outage plan

When using a total station and other instruments for live measurement, the operation is complicated. At the same time, due to the small span of flexible conductors in the substation and the low height of the structure, it is difficult to quickly and accurately determine the position of the lowest point of the flexible conductor due to the influence of the live safety distance, and the measurement results large error

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