Pumps – Condition responsive control of pump drive motor – By controlling drive motor motive fluid
Patent
1997-04-21
1999-03-09
Thorpe, Timothy S.
Pumps
Condition responsive control of pump drive motor
By controlling drive motor motive fluid
F04B 4920
Patent
active
058791337
ABSTRACT:
A method is provided for controlling fuel flow to the combustor of a gas generator turbine during sudden changes in load or during a surge cycle of the process turbocompressor. Surge control is initiated by analog input signals emanating from various devices located throughout the compressor-process system. The fuel control system includes input signals from the gas turbine driver. These signals are acted upon by the fuel control system which transmits a signal to a fuel valve actuator that controls the valve that meters fuel to the combustor. In addition to this sequence of control communication, however, is a rate-of-change in the amount of the fuel provided. The rate of the increase of the amount of fuel is determined by current operating functions of the fuel control system. However, because of the characteristics of general load rejection and recovery, and the abrupt nature of surge, the rate of change in the flow rate of fuel is extremely high. This rapid increase of fuel to the combustor may lead to dangerous excursions in temperature, resulting in high temperatures in gas turbine elements. Consequently, a new function is added to the fuel control system's operation whereby improved regulation of the rate of increase of fuel is achieved. This new function receives a signal that either surge or a change in load has been detected. Next, a signal is transmitted to the fuel valve actuator, regulating fuel to the combustor, thus power to the power turbine, thereby preventing overspeeding. After that, the rate of change of the fuel valve is limited for a period of time. Once recovery has been accomplished, the change rate of the fuel valve is gradually returned to a normal operating setting.
REFERENCES:
patent: 3874167 (1975-04-01), Katsume et al.
patent: 4045955 (1977-09-01), Brannstrom et al.
patent: 4046490 (1977-09-01), Rutshtein et al.
patent: 4117668 (1978-10-01), Elsaesser et al.
patent: 4142838 (1979-03-01), Staroselsky
patent: 4280059 (1981-07-01), Zickwolf, Jr.
patent: 4529887 (1985-07-01), Johnson
patent: 5180923 (1993-01-01), Tyler
patent: 5252860 (1993-10-01), McCarty et al.
patent: 5272637 (1993-12-01), Urushidani et al.
patent: 5329757 (1994-07-01), Faulkner et al.
Fink, D.G. and A.A. McKenzie, eds. 1975. "Electronics Engineers' Handbook". McGraw-Hill Book Company, New York. Three pages.
Instrument Society of America (ISA). 1979. Process Instrumentation Terminology. ISA, North Carolina. Pp. 11-13.
Mollenkamp, R.A. 1984. Introduction to Automatic Process Control. ISA, North Carolina. pp. 125-136.
Parker, S.P., eds. 1984. "Dictionary of Mechanical and Design Engineering". McGraw-Hill Book Company, New York. p. 132.
Batson Brett W.
Mirsky Saul
Narayanan Krishnan
Staroselsky Naum
Compressor Controls Corporation
Ratcliffe Paul L.
Thorpe Timothy S.
LandOfFree
Prevention of parameter excursions during process compressor sur does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Prevention of parameter excursions during process compressor sur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Prevention of parameter excursions during process compressor sur will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1314145