Transitórios hidráulicos em usinas hidroelétricas para estudos em sistemas de potência.

Abstract

This work presents a two mathematical methods to calculate hydraulic transients in Hydroeletric Power Stations. The methodology is based on Characteristics Equations and Transfer Functions. Two of these equations can be applied to study of stability in Power Stations. One application of the methodology presented here made at the Paulo Afonso IV Hydroeletric Power Stations, whose data were given by the Companhia Hidroeletrica do Sao Francisco- CHESF. The mathematical methods were used to calculate and plote pressure oscillations, the flow and mechanic power, for load rejections of the CHESF West subsystem Two comparative analysis were conducted using the mathematical methods: one, with results obtained from the commisionment test of one of the Paulo Afonso IV Hydroeletric Power Stations turbines and the other, with results obtained though the use of the digital stability program