IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0397206
(1982-07-12)
|
우선권정보 |
CH-198104565 (1981-07-13) |
발명자
/ 주소 |
|
출원인 / 주소 |
- BBC Brown, Boveri & Company, Limited
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대리인 / 주소 |
Burns, Doane, Swecker & Mathis
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인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
▼
Device for determining the power output of a turbo-group during disturbances in the electricity supply network, the working-medium pressures at the beginning and the end of all turbine-sections being utilized, from the time the disturbance breaks out, throughout its duration, and until the signal os
Device for determining the power output of a turbo-group during disturbances in the electricity supply network, the working-medium pressures at the beginning and the end of all turbine-sections being utilized, from the time the disturbance breaks out, throughout its duration, and until the signal oscillations die away, in order to generate a signal representing the instantaneous power output of the turbo-group, this signal being employed to implement the regulating function during the disturbance.
대표청구항
▼
1. Device for determining the power output of a turbo-group during disturbances in the electricity supply network, the turbo-group being subdivided into n turbine-sections, a pressure-measuring point for the working-medium pressure being provided, in each case, at the beginning and the end of each t
1. Device for determining the power output of a turbo-group during disturbances in the electricity supply network, the turbo-group being subdivided into n turbine-sections, a pressure-measuring point for the working-medium pressure being provided, in each case, at the beginning and the end of each turbine-section, in general for monitoring operation, the turbo-group also possessing an automatic control unit (25) and control elements (26), for regulating the power output during normal, undisturbed operation, and featuring a switch-over relay (24), which can be actuated by a signal which is triggered by the disturbance, this relay being designed to activate the device (18) when a disturbance occurs, the turbo-group also featuring pressure-signal lines (19,20,21), which are designed to be pressurized from the above-mentioned pressure-measuring points thereon, while the device (18) features n groups of computing elements, each of which is individually assigned to one of the n turbine-sections, the computer elements (1-16, 28-36) of each group in the device being structured in a manner such that, when a disturbance occurs, they process the pressures (p 1,i, p 2,i, p 1,i+1, p 2,i+1, . . . p 1,n, p 2,n )which are supplied by the pressure-signal lines (19, 20, 21), as input variables, to generate an output signal representing the instantaneous power output P i (t) of a turbine-section (i), in which device an adder (16;36) is provided, which combines the P i (t) output signals to generate a resulting output signal representing the instantaneous total power output P(t) of the turbo-group, this signal being intended to be supplied to the automatic control unit (25) of the turbo-group (17), in order to sustain the regulating function throughout the duration of the event producing the disturbance. 2. Device as claimed in claim 1, wherein the computer elements (1-16) of the n groups are, in every case, designed to evaluate the function ##EQU##P i =C i (p 1 2 ,i -p 2 2 ,i ) 1/2 (p 1,i -p 2,i )p 1,i -e .sbsp.1,i p 2,i -e .sbsp.2,i -b i in which p 1,i and p 2,i respectively denote the pressures at the beginning and the end of the i th turbine-section, e 1,i and e 2,i are exponents, determined by an optimization procedure, for respectively, the beginning and the end of the i th turbine-section, the constant ##EQU## in which Δh i,IC denotes the enthalpy difference in the turbine section i and the constant b i denotes the power loss P i,loss in the turbine-section i, while the index IC denotes the value of the variable in question during a steady-state operating condition, for example full load, serving as a reference condition. 3. Device as claimed in claim 1, wherein the computer elements (28-36) of the n groups are, in every case, designed to evaluate the function ##EQU##P i =C i (p 1 2 ,i -p 2 2 ,i ) 1/2 -b i in which p 1,i and p 2,i respectively denote the pressures at the beginning and the end of the i th turbine-section, the constant ##EQU##C i =(P i,IC +P i,loss )(p 1 2 ,i,IC -p 2 2 ,i,IC ) -1/2 the constant b i denoting the power loss P i,loss in the turbine-section i, while the index IC denotes the value of the variable in question during a steady-state operating condition, for example full load, serving as a reference condition.
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