TITLE:
Francis Turbine and Governor Improved Models Considering Step Closing Law of Guide Vanes for Power System Stability Analysis
AUTHORS:
Yuheng Tang
KEYWORDS:
Francis Turbine, Governor, Actuating Mechanism, Step Closing Law, Improved Models, Power System Stability Analysis
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.9,
September
16,
2014
ABSTRACT: The Francis turbine governing system models
in PSD-BPA can’t precisely reflect the actual characteristics. Endeavor was
done in this paper to solve the problem. An improved model of actuating
mechanism was developed, which could reflect the step closing characteristic of
hydro guide vanes. The effect of the inflection point value of actuating mechanism
on load rejection was analyzed based on simulation. The non-linear Francis
turbine model with power versus gate position module was researched in this
paper. Based on field test, comparisons of simulation results with measured data
were presented. The analysis demonstrates that the improved models of Francis
turbine and governor proposed in this paper are more realistic than the models of
BPA, and can be applied in power system simulation analysis better.