US 3892975 A
A gas turbine power plant is provided with an industrial gas turbine which drives a generator coupled to a power system through a breaker. The turbine-generator plant is operated by a hybrid control system having digital function capability during sequenced startup, synchronizing, load buildup and steady state load, and shutdown operations. The control system also contains monitoring and protective subsystems which function through all stages of operation, with redundancy and permissive features which maximize turbine availability.
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Description (OCR text may contain errors)
United States Patent Yannone et a]. July 1, 1975  GAS TURBINE POWER PLANT CONTROL 3,382,67l 5/i968 Ehni r. 290/38 APPARATUS HAVING IMPROVED 3,446,224 5/l969 Zwicky 290/40 3,533,236 l/l970 Cottington 290/40 MONITORING AND ALARM ELEMENTS inventors: Robert A. Yannone, Aldan; James J.
Shields, Philadelphia, both of Pa.
Primary ExaminerG. R. Simmons Attorney, Agent, or Firm-S. A. Seinberg  Assignee: Westinghouse Electric Corp.,
Pittsburgh, Pa. 57] ABSTRACT 22 F'l d: 20, l 73 I 1 June 9 A gas turbine power plant is provided with an indus-  Appl. No.: 371,630 trial gas turbine which drives a generator coupled to a power system through a breaker. The turbine-  U S 0 290/40. 60,39 235/151 21 generator plant is operated by a hybrid control system  F026 M having digital function capability during sequenced  Field 60/39 startup, synchronizing, load buildup and steady state 35 5 load, and shutdown operations. The control system also contains monitoring and protective subsystems  References cued which function through all stages of operation, with redundancy and permissive features which maximize UNlTED STATES PATENTS mrbine availability 3,243,596 3/1966 Loft 290/40 3,340,883 9/1967 Peternel 290/40 10 Claims, 39 Drawing Figures n H 25o PABK,- PZC/ HPZC) 2 R P I BASE za 5 I 203 EXHAUST Exn TEMP, THERMOCOUPLES zr CONTROL T p (lkOlAIOdd 267 A 52X p AND K/ T269 I'PARY AMBIENT owmm TEMP e/P TEMP, SENSORS CONTROL T23| iC/p 253 (STARTING al-w '258 TRANSIENT] K .J 8/? s ADE PAT I rttnmocouztes Accu. Low
Z /p 20 SIGNAL- SPEED LOAD SELECT zc LOAD (L55) lB/V TOTAL RATE zos SPEED s ree LOAD CHANGER 5 CONTROLLER ass j EL- isen i V c HZ;P FR ss-m I a i i L r 1 FAQ mam ,VLHMAL r z I-v'TrII I I I 1})8 T 7g. [48 I R TIMER MANUAL COUNTER AT ONE RE TI RESET M SHUTDOWN COUNTER OR COUNTER AT ZERO CONDITIONS MASTER A I CONTROL (4Y1) LOCKOUT SIGNAL MIN LSX TWO-SHOT BASE OR RESTART a TI PEAK A (RZX) LIJ 3 LL] 0. U)
2 TIME w NOT N I. T'IgJ4D ,3 T" ,I4C
S I TEI I I975 1,892,975
SHEET 9 zc 234 /225G 233 GAS I GAS ToTALIzER ETGSA L l T 2II H l I: IoIw 22I .2 I NR 1 T SUPPLY 2Io Y 225 f LSS- PR l' 1 I I I OIL I 235 HLR 206 PZC ToTALIzER I I R0 236 -E'S FUEL oIL PUMP M CONT- T0 FUEL oIL DISCHARGE PRESSURE T p G CO PRESSURE REGIvALvE F lg. 8A
F lg. 88
FUEL OIL OIL To COMBUSTION I T T.v. SYSTEM 7 9 \F z PRESSURE REG. 4 CONT. VALVE l l l --LSS LTRANSFER I SWITCH I I24 L GAS FUEL GAS \TO COMBUSTION v T.v. SYSTEM GAS STARTING VALVE GAS STARTING f 8| SIGNAL