| On the basis of utilizing the existing transmission line, improving theutilization efficiency of wire sufficiently,improving the capacity oftransmission line is the key to solve the problem of the inefficient capacityof the power system in a cost effective and environmental friendly way.This thesis discuss the way to improve the capacity of transmissionline,including the static and dynamic way to improve the capacity. Andthen give a deep analysis of different calculation method,meanwhile thisthesis gives a detailed introduction of the IEEE method to calculate thecurrent, builds the model for capacity calculation,analyses the effect ofdifferent factors to the result of the capacity,and proposes the solvingstrategy of the transient heat balance equation in a improved euler method.This thesis compares different types of wires and its actualparameters.Then refer to the actual situation of guang dong province andthe definition of normal condition and emergency condition,proposes thedefinition of risk,caculates and analyzes the transmission line capacity innormal condition and emergency condition separately,analyzes the effectof reclosure to the temperature of the transmission line in emergency andprovides the gidence to the power grid operation.The thesis Combines the data got from online monitoring anduncertainty theory,builds the transmission line capacity calculation modelbased on Monte Carlo method,analyzes the capacity in steady state andtransient state,gives the range of conductor carrying capacity in a specified interval,and the mean and variance of the conductor carryingcapacity,develops the software to calculate the capacity,analyses thecapacity for normal condition and emergency condition. |
