EP0070047A1 - Dispositif de détermination de la puissance d'un groupe turbo pendant des dérangements du réseau - Google Patents

Dispositif de détermination de la puissance d'un groupe turbo pendant des dérangements du réseau Download PDF

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Publication number
EP0070047A1
EP0070047A1 EP82200541A EP82200541A EP0070047A1 EP 0070047 A1 EP0070047 A1 EP 0070047A1 EP 82200541 A EP82200541 A EP 82200541A EP 82200541 A EP82200541 A EP 82200541A EP 0070047 A1 EP0070047 A1 EP 0070047A1
Authority
EP
European Patent Office
Prior art keywords
turbine
power
turbo group
constant
turbine part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82200541A
Other languages
German (de)
English (en)
Other versions
EP0070047B1 (fr
Inventor
Karel Dr. Dipl.-Ing. Skala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to AT82200541T priority Critical patent/ATE15526T1/de
Publication of EP0070047A1 publication Critical patent/EP0070047A1/fr
Application granted granted Critical
Publication of EP0070047B1 publication Critical patent/EP0070047B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/24—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical electrical

Definitions

  • the present invention relates to a device for determining the power of a turbo group during network faults.
  • the present invention which is defined in the characterizing part of patent claim 1, describes a device which can take over the power control of the turbo group immediately in the event of such a fault.
  • the performance measurement for the device in question is based on the determination of the values of the state variables of the work equipment, in the two versions to be described, that is, the steam.
  • the simplest method which is used in the device according to FIG. 4 is to determine the instantaneous mechanical power P (t) of the turbo group solely on the basis of the vapor pressures.
  • the tap pressures p 1, i , p 2, i , p 1, i + 1 , p 2, i + l etc. see here Fig. 1, j e - because before and after a turbine part, allow with the help of the steam cone law Q i ( p i ) the calculation of the steam flows Q. (t) and thus in a first approximation of the power P i (Q i ).
  • the turbine part is to be understood as a section of the turbine between two extraction points for measuring the vapor pressures P 1, i , p 2 i etc.
  • both valve groups i.e. the intake and the interception valves
  • the intake and the interception valves are brought into a throttle position
  • ⁇ h i (t) is the instantaneous enthalpy difference in the case of polytropic expansion and P i, Verl is the power loss of the turbine part in question.
  • a state marked with the index IC is to be understood as a reference state from which the values of all relevant state variables are known exactly, e.g. the steady state at 100% load.
  • the power loss P i Verl summarizes the leakage, ventilation and friction losses. It can be approximated by a constant without appreciably affecting the accuracy.
  • Equation (3) is given the form as a function of P i :
  • the first link of (6) is in a known manner by decomposing the radical into and forming the sum or difference of p 1, i and p 2, i in sum-forming elements, ie in an adder 1 and in a subtractor 2, multiplying them in a multiplier and extracting the root in an eraser 4.
  • multiplii Zierer 6 Furthermore follows in a multiplii Zierer 6 the multiplication of this value by the constant C i supplied by a read-only memory 5, a multiplication by the difference (P 1, i -p 2, i ) supplied by the subtractor 2 in a multiplier 7, multiplication by p 1, -e i 1, i and p 2, i e 2, i in multipliers 8 and 9, respectively, which factors are supplied to these multipliers via inverters 10 and 11 fed with P 1, i and P 2, i and potentiators 12 and 13 respectively .
  • Fig. 3 shows a block diagram of the control loop of a steam turbine group 17 with the device 18 according to the invention. It is assumed that the vapor pressures are extracted from two turbine parts, the pressure tapping line 19 for the pressure p 1.1 and the pressure tapping line 20 for the Pressure p 2 1 and at the same time for the pressure p 1.2 , which is equal to p 2.1 , see here Fig. 1, and the pressure tapping line 21 is provided for the pressure p 2.2 .
  • the generator 22 feeds a power controller 25 with the instantaneous value of the electrical load via a signal line 23 and a switching relay 24 in the normal, correct operating state.
  • the control signals from the power controller 25 reach the actuators of the control valve group 26, which adapt the steam supply to the turbo group 17 to the respective requirement. This is the operation in the case of an undisturbed network, in which the contact element 27 of the switching relay 24 is in the position (27) shown in broken lines.
  • the control loop corresponds to that shown in FIG. 3.
  • the tapping for the measurement of the pressures is expediently carried out on the tapping lines which are present at the beginning and end of the turbine parts for operational reasons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
  • Dc Machiner (AREA)
  • Control Of Electric Motors In General (AREA)
EP82200541A 1981-07-13 1982-05-06 Dispositif de détermination de la puissance d'un groupe turbo pendant des dérangements du réseau Expired EP0070047B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82200541T ATE15526T1 (de) 1981-07-13 1982-05-06 Einrichtung zur leistungsbestimmung einer turbogruppe waehrend netzstoerungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH456581 1981-07-13
CH4565/81 1981-07-13

Publications (2)

Publication Number Publication Date
EP0070047A1 true EP0070047A1 (fr) 1983-01-19
EP0070047B1 EP0070047B1 (fr) 1985-09-11

Family

ID=4278453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82200541A Expired EP0070047B1 (fr) 1981-07-13 1982-05-06 Dispositif de détermination de la puissance d'un groupe turbo pendant des dérangements du réseau

Country Status (4)

Country Link
US (1) US4451740A (fr)
EP (1) EP0070047B1 (fr)
AT (1) ATE15526T1 (fr)
DE (1) DE3266140D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113691A (en) * 1989-02-26 1992-05-19 Westinghouse Electric Corp. Turbine-medium flow monitor
IT1248448B (it) * 1990-02-26 1995-01-19 Westinghouse Electric Corp Metodo e dispositivo per controllare la portata di un fluido in una turbina

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH371463A (de) * 1958-09-03 1963-08-31 Sulzer Ag Verfahren zur Regelung eines aus einem Dampferzeuger und einer Dampfturbine bestehenden Aggregates
GB1267590A (en) * 1968-07-08 1972-03-22 Tokyo Shibaura Electric Co Automatic extraction and exhaust pressure type turbine control system
DE2812820A1 (de) * 1978-01-31 1979-08-02 Bbc Brown Boveri & Cie Verfahren und einrichtung zur regelung einer dampfturbine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657552A (en) * 1970-06-01 1972-04-18 Robert H Park Method for employment of fast turbine valving
US3999390A (en) * 1974-04-25 1976-12-28 Westinghouse Electric Corporation HTGR power plant turbine-generator load control system
US4039846A (en) * 1975-08-18 1977-08-02 Allied Chemical Corporation Control of a steam-heating power plant
CH617494A5 (fr) * 1975-08-22 1980-05-30 Bbc Brown Boveri & Cie
US4120159A (en) * 1975-10-22 1978-10-17 Hitachi, Ltd. Steam turbine control system and method of controlling the ratio of steam flow between under full-arc admission mode and under partial-arc admission mode
US4271473A (en) * 1979-09-27 1981-06-02 Leeds & Northrup Company Control of parallel operated turbines in cogeneration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH371463A (de) * 1958-09-03 1963-08-31 Sulzer Ag Verfahren zur Regelung eines aus einem Dampferzeuger und einer Dampfturbine bestehenden Aggregates
GB1267590A (en) * 1968-07-08 1972-03-22 Tokyo Shibaura Electric Co Automatic extraction and exhaust pressure type turbine control system
DE2812820A1 (de) * 1978-01-31 1979-08-02 Bbc Brown Boveri & Cie Verfahren und einrichtung zur regelung einer dampfturbine

Also Published As

Publication number Publication date
EP0070047B1 (fr) 1985-09-11
DE3266140D1 (en) 1985-10-17
US4451740A (en) 1984-05-29
ATE15526T1 (de) 1985-09-15

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