Author(s): Hermod Brekke
Linked Author(s): Hermod Brekke
Keywords: No Keywords
Abstract: The purpose of this paper is to present methods for mathematical modelling and development of stabilizing systems for control of Hydroelectric power plants with long high pressure tunnel systems or traditional tunnels and long penstocks. The Structure Matrix Method (SMM) which is the basic tool for stability analysis in the frequency domain by means of Laplace transformed equations will be presented. The analysis includes a frictional damping term of the pressure oscillations as function of the frequency and the flow amplitudes and the influence of the turbine characteristics (Ref. [1]). The second part of the paper includes a presentation of a recently developed pressure feedback system for a turbine governor, which in some cases can substitute for a surge chamber. This system has been proven to work successfully in agreement with a theoretical analysis made with the computer program STABANA based upon the SMM method A presentation of frequency response measurement compared with the computed stability analysis for a power plant with a long penstock will be given.
Year: 1995