ABSTRACT
III
THE RESEARCH OF
TRANSIENT PROCESS
OF LONG TUNNEL PRESSURE DIVERSION
TYPE POWER STATION BASE ON MALAB
ABSTRACT
Hydro-turbine transition process is mainly caused by load changes, with the speed
variations of units and interactions between water hammer pressure changing and surge
waving, the safety of hydropower station and the quality of electricity are usually under
affecting. According to the size of the load changing, transition process is divided into great
fluctuations and small perturbation. Great fluctuation transient process directly affect the
operation and threat to hydropower station, the stability of small perturbation and power
quality are closely related. The function of calculation of transition process is not only
alleviating the contradiction between rising of rotating speed and rising of water hammer
pressure, but also rigorously analyzing and calculating the dynamic characteristics and
stability of transition process and making an assessment of rationality and safety strength of
water conveyance system, to provide the reference for the design, optimization, or units
running of Hydro-power station.
The part of introduction of this dissertation simply introduced the practical value of the
transition process research and the development situation both interiorly and abroad
，
summarized the current situation and listed the legacy. The body part of this dissertation
introduced the theory of calculation of water hammer, discoursed the optimal means and
calculation method of long tunnel pressure diversion type power station in details. Meanwhile,
this dissertation used the MATLAB language for programming under the promise of
considering the interaction between surge wave and water hammer, made the calculation for
the great fluctuations and small perturbation of specific engineering. For great fluctuations,
this dissertation ascertaining the specific parameters of regulation guarantee and
corresponding transition curves, provided the curve charts of water levels in surge tank. For
small perturbation, this dissertation united both state equation analysis method and method of
characteristics for small perturbation
，
optimized the governor setting parameters.
Besides, this dissertation gave some optimal advices to power station and made a data
comparison between before and after optimization in many kinds of control working
conditions. Finally, this dissertation demonstrated the feasibility of optimization measures in
