Method of calculating steady-state heat capacity of power circuit

Abstract

A method of calculating steady-state heat capacity of a power circuit relates to the technical field of monitoring of the power circuit, solving the technical problem that the calculated result in the conventional method has a large deviation. The method comprises the following specific steps: 1), measuring a ambient temperature and a conductor temperature of a sample conductor in two measuring environments, and calculating an ambient temperature influencing coefficient of the sample conductor according to a measured value; 2) taking the ambient temperature influencing coefficient of the sample conductor as a circuit ambient temperature influencing coefficient of the power circuit, and establishing a steady-state heat capacity formula of the power circuit; and 3) when a current circuit ampacity of the power circuit is required to be calculated, firstly, measuring a current circuit temperature and a current ambient temperature of the power circuit, and obtaining a current alternating current resistance of the power circuit, and then, according to the current circuit temperature, the current ambient temperature, the current alternating current resistance and the steady-state heat capacity formula of the power circuit, calculating the current circuit ampacity of the power circuit. According to the method, the calculated result of the circuit ampacity has a relatively small deviation.

Description

technical field [0001] The invention relates to a power line monitoring technology, in particular to a technology for calculating a steady-state heat capacity of a power line. Background technique [0002] Power lines are important equipment for power transmission and play a vital role in power supply to users. The most important requirement for power transmission lines is safe operation. Calculating the steady-state heat capacity of the running transmission line can predict the temperature rise and fall of the line, which is helpful for the dispatcher to predict the carrying capacity of the line, and carry out early warning processing when abnormal conditions occur, so as to ensure the safe and reliable operation of the power line . [0003] When the existing methods calculate the steady-state heat capacity of power lines, they only consider the radiation heat dissipation, convection heat dissipation, sunlight heat absorption and heat generated by line loads of power lines...

AI Technical Summary

Problems solved by technology

[0003] When the existing methods calculate the steady-state heat capacity of power lines, they only consider the radiation heat dissipation, convection heat dissipation, sunlight heat absorption and heat generated by line loads of power lines, and do not consider the factors affecting the heat dissipation of power line conductors by ambient temperature. Therefore, the calculation The large deviation of the steady-state heat capacity of the power line will lead to a large error in the predicted temperature of the wire of the power line, thus affecting the safe operation of the power line

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