Calculating method of ice concentration of transmission line

Abstract

The invention provides a computing method of ice concentration of a transmission line. The method comprises the following steps: the wire temperature and the elastic dependent variable in the fixed span of the transmission line are measured through a fiber grating measuring system; the total dependent variable in the fixed span of the transmission line is obtained according to the wire temperature and the elastic dependent variable; the wire specific load in the fixed span of the transmission line is obtained according to the total dependent variable and the wire specific load is compared with the wire self specific load in the fixed span of the transmission line; if the wire specific load is higher than the wire self specific load, the additional load in the fixed span of the transmission line is calculated; and the ice concentration in the fixed span of the transmission line is obtained according to the additional load. The invention overcomes the problem of higher measuring result error caused by lower measuring accuracy and poorer anti-electromagnetic interference capability due to the adoption of an electric parameter measuring method for measuring stress, temperature and inclination angle in the prior art.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method for calculating the amount of ice covering a power transmission line. Background technique [0002] Under the current background of rapid economic development in my country, the whole society has higher and higher requirements for power reliability, and the economic losses caused by power accidents are becoming more and more serious. Transmission lines are widely distributed, and the environment is harsh. They often encounter events such as large-scale pollution flashovers, icing, and lightning strikes. They are usually weak links in the power grid. [0003] The monitoring methods of conductors on high-voltage overhead transmission lines mainly include stress monitoring, temperature detection and sag monitoring. Stress monitoring and sag monitoring are also important technical foundations for preventing icing-covered disconnection accidents. On the one hand, the data and ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a calculation method for the amount of icing on transmission lines, which can solve the problem of using the electrical parameter measurement method for the measurement of stress, temperature and inclination angle in the prior art, which has low measurement accuracy and poor anti-electromagnetic interference ability , resulting in large errors in measurement results

Images