Study On Design And Simulation Of Altiplano Long Distance Transmission Electricity Line Voltage Compensation

For Qinghai-Tibet Railway is in Qinghai-Tibet tableland and lack of electric power, the railway's 35kV should use long distance electric power transmission. This arise some problems. For the long distance, The Tibet part of the 35kV electric power transmission have the large voltage fluctuation, harmonic, over voltage and voltage flickering problems. The large voltage fluctuation and over voltage is more serious. Consider of the requirement of the transmission's reliance and stability in Qinghai-Tibet Railway, this thesis put forth the probability proposition of the configuration of the dynamic reactive power compensation.At first, this thesis analysis the usage of various dynamic reactive power compensation equipment in present situation. Combine the feature of the Qinghai-Tibet Railway's electric power transmission, this thesis put forth a mixed type of dynamic reactive power compensation that uses Inverters of Power Electronics and inductance in parallel to adjust voltage. According to the topological structure of the compensation equipment, this thesis set up mathematical model of the equipment. Based on the mathematical model, this thesis do the dynamic performance analysis and also give out the system's parameter preliminary, then use then MATLAB/Simulink tools to simulate the Qinghai-Tibet Railway's long distance electric power transmission system. At last, by the analysis of the simulation's result, this thesis certified the compensation equipment's probability used in Qinghai-Tibet Railway's long distance electric power transmission system.