FIELD: mechanical engineering.
SUBSTANCE: invention relates to the field of protection of turbomachine units, including gas turbine installations (gas turbines and machines driven by them, for example, generators), from dangerous overspeed in case of sudden full or partial load release. In the method for resuming fuel supply in order to prevent deviation of the parameters of the power turbine of the turbomachine unit in case of a sudden full or partial load release, including the supply of signals about the values of the rotational speed of the rotor of the power turbine (npt), the rotational speed of the rotor of the gas generator (ngg) and one of the load parameters, as well as the formation of a signal to control fuel consumption in the combustion chamber, the value of the thermodynamic parameter of the gas generator is also determined, compared with the corresponding threshold value, and when a signal is received simultaneously that the parameter value exceeds its threshold value and a signal about a sudden full or partial load release, commands are given to turn off the fuel supply to the combustion chamber and to turn on the ignition for a specified period of time, and the value of the ngg is also additionally compared with the corresponding threshold value of the nggthreshold and the value of the npt with the corresponding threshold value of the nptthreshold, the first derivative of the rotation frequency of the rotor of the power turbine by the time of pt is determined, its value is compared with the corresponding threshold value of
ptthreshold, and also the value of the increment of the rotor speed Δnpt is determined after the load is released, and further, if npt< nptthreshopd; |
pt| <
ptthreshold, Δnpt<0 and nptr>nptthreshold, a signal is given to turn on the fuel supply to the combustion chamber, additionally to ensure the transition to fuel supply to the combustion chamber according to the standard laws of regulation when resuming fuel supply while preventing a deviation of the parameters of the power turbine of the turbomachine unit in case of sudden full or partial load release, for the determination of the ignition of the combustion chamber and the beginning of an increase in the fuel supply to the CC, the value of the temperature increment behind the turbine is determined, ΔTt, after the signal is given to turn on the combustion chamber fuel supply, it is compared with the threshold value of ΔTtthreshold, the first derivative of the rotation speed of the gas generator rotor is also calculated by the time of
gg , it is compared with the threshold value of
ggthreshold1 and when the conditions (ΔTt > ΔTtthreshold) or (
gg >
ggthreshold1) are met, a sign of ignition of the combustion chamber is formed and an increase in fuel supply to the CC begins with a predetermined dGt/dt rate, while the first derivative of the rotation frequency of the rotor of the gas generator in time
gg , it is compared with the threshold value of
ggthreshold2 and when the conditions (
gg >
ggthreshold2 ) are met, the transition to controlling fuel supply to the combustion chamber is performed according to the standard regulatory laws.
EFFECT: invention makes it possible to increase the safety of the operation of the turbomachine unit and to ensure the reliability of the ignition of the combustion chamber and the shockless transition from ignition to fuel consumption control according to the standard laws of regulation, which makes it possible to increase the reliability of the turbomachine unit as a whole.
1 cl, 1 dwg
Title | Year | Author | Number |
---|---|---|---|
METHOD OF PREVENTING DEVIATION OF PARAMETERS OF POWER TURBINE OF TURBOMACHINE SET AT ABRUPT COMPLETE OR PARTIAL SHEDDING OF LOAD | 2002 |
|
RU2225945C2 |
METHOD TO PROTECT GAS-TURBINE PLANT FROM OVERSPEEDING OF POWER TURBINE | 2006 |
|
RU2316665C1 |
POWER PLANT AUTOMATIC CONTROL SYSTEM | 2007 |
|
RU2360137C1 |
METHOD OF AND DEVICE FOR PREVENTING DEVIATION OF GAS TURBINE PARAMETERS (VERSIONS) | 1995 |
|
RU2168044C2 |
METHOD TO PROTECT GAS TURBINE ENGINE IN STARTING SURGE | 2009 |
|
RU2403454C1 |
METHOD FOR PROTECTING A GAS TURBINE ENGINE FROM PUMPING | 2020 |
|
RU2747542C1 |
METHOD FOR PULSE UNLOADING OF POWER GAS TURBINE PLANT DURING SUDDEN LOAD SHEDDING | 2023 |
|
RU2810330C1 |
TECHNICAL DIAGNOSIS METHOD FOR GAS TURBINE PLANT | 2013 |
|
RU2536759C1 |
METHOD OF DIAGNOSING UNSTABLE OPERATION OF GAS-TURBINE ENGINE COMPRESSOR AT STARTING | 2006 |
|
RU2316678C1 |
METHOD AND DEVICE TO START GAS TURBINE PLANT | 2008 |
|
RU2374472C1 |
Authors
Dates
2023-02-10—Published
2022-05-31—Filed