Simulation research on key influencing factors of power oscillation of steam turbine units
Identifying the factors that trigger power oscillations is a prerequisite for suppressing power oscillations.Combined with the actual needs,an improved model of thermal power units is established for multi-condition simulations,which can effectively simulate and diagnose the fault scene.Based on the mechanism of negative damping,the paper theoretically analyzes the power oscillation of steam turbine triggered by several typical failure modes and main component parameters of the speed-governing system.The established model is used to conduct a large range of perturbation simulation tests on each parameter.The phenomenon of different failure modes triggering power oscillation of the units is simulated and analyzed.The results show that the model has a better simulation effect in reflecting the dynamic characteristics of the thermal system and the regulating system and the influence on the power response of the units.The power oscillation frequency and other parameters are also different in different failure modes,which is valuable for finding the main factors that cause power oscillation.
power oscillationthermal power unitsspeed-governing systemmechanism of negative dampingfailure mode
NETL
NSTL
万方数据
维普
