Method for calculating thermal transient current-carrying capacity of overhead line based on recursion method and dichotomy

• Main Authors: HUANG HAI, QIN JIBIN, LIN JING
• Format: Patent
• Language: Chinese; English
• Published: 19.02.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a method for calculating the thermal transient current-carrying capacity of a wire in an overhead line, in particular to a method for calculating the thermal transient current-carrying capacity of the overhead line based on a recursion method and a dichotomy. The method comprises the following steps: calculating a primary line temperature increment according to a step length of 1s when the overload time on the overhead line is generally within 10-30 minutes, so as to enable the computing precision to meet the actual requirements; designing a corresponding function according to a recursion method so as to obtain a thermal transient line temperature in a time period when the overload current is applied; inversely calculating the thermal transient current-carrying capacity by the calculation function of the thermal transient line temperature, wherein the function needs to be arranged into a form that f (I) is equal to 0 before the bisection method is applied to root calculation, so an ac