Análise de faltas em um sistema HVDC.

Abstract

The growing demand for electricity and the distance of large generating units of consumer centers have offered challenges for power transmission area. Therefore, the HVDC transmission has great importance in the last decades by becoming attractive when its comes to the power transmission over long distances. This type of transmission provides important challenges for research and performance studies and a very important tool in support of studies for this technology is the reference model created by CIGRÉ, which enabled the implementation of this system for the analysis of operating conditions in the field time in real time from softwares such as ATP, PSCAD, MATLAB/SIMULINK, among other. A study of the major components of a monopolar HVDC system and its static characteristics, so that it was possible to observe their behavior and control activities on the application of fault in AC buses of converters bridges. Among the types of control discussed in the literature, can be highlighted throughout the work, the CCC (Constant Current Control), CIA (Constant Ignition Angle), CEA (Constant Extinction Angle) and VDCOL (Voltage Dependent Current Order Limit). The ATPDraw software was used to model the Benchmark CIGRE HVDC system and perform fault simulation for further analysis of the performance of the controls of the rectifier and inverter bridges as well as the response time of these systems.