Classifications

• • 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
  • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
  • F01D15/10—Adaptations for driving, or combinations with, electric generators
• • 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
  • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
  • F01K15/00—Adaptations of plants for special use
• • 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
  • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
  • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
  • F01K7/165—Controlling means specially adapted therefor
• • 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
  • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
  • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
  • F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating

Definitions

• the invention relates to a control system for a thermal flame station for generating electricity from fuel.
• the invention relates more precisely to a control device of such a power plant for monitoring power while ensuring that certain criteria of the state of the superheated steam are met, and a thermal power plant comprising such system, and a method of controlling a thermal power plant by the implementation of such a control system.
• the invention can be applied for example to a coal-fired power plant.
• a thermal power station a schematic illustration of which is shown in Figure 1, is used to generate electricity from a fuel source of heat.
• the production of heat is governed by the supply of fuel GC of the heat source, here a boiler 103.
• This heat is transmitted to a working fluid circulating in a circuit to make it pass from the liquid state to the gaseous state, so that this working fluid is in vapor phase on a part of the circuit.
• Regulating valves whose state is defined by their opening SR make it possible to regulate the supply of a turbine 114.
• the state of the vapor is defined by a certain pressure P and a certain temperature T. The vapor allows the rotation of the turbine 1 14 which is mechanically connected to an alternator 1 16, the latter thus producing an electric power W.
• a PI regulator is a closed-loop control that allows the regulation of the error between a setpoint and a measurement of a value.
• the PI regulator exerts on the error a doubled proportional action - it multiplies the error by a fixed factor, the gain, - and integral - it integrates the error over a certain time interval and divides the integrated value by another factor fixed.
• each system variable controller has an input and an output.
• An objective of the invention is therefore to propose a thermal plant control system that makes it possible to overcome these disadvantages.
• An object of the invention is therefore more precisely to provide a control system of thermal power plant providing regulation for good power dynamics, having interesting characteristics of robustness, stability and speed.
• Another object of the invention is that this control system can be easily implemented in existing thermal power stations. DESCRIPTION OF THE INVENTION
• the invention proposes to fulfill these objectives.
• a control system for the multivariable regulation of a thermal flame station for the generation of electricity from fuel comprising:
• control loops is based on an internal model type control taking into account a pure delay ⁇ of one of the parameters of the internal model of the control unit, and for each of the control loops, a variable of a loop being taken into account as a disturbance in the other loop.
• the vapor pressure control loop includes a disturbance rejection chain for taking into account a variable of the electric power control loop as a disturbance;
• Variable electric power control loop taken into account as a disturbance in said vapor pressure control loop is open the regulating valve upstream of the turbine;
• the vapor pressure control loop includes a modeling chain of a transfer function between the fuel supply and the contribution to the vapor pressure of the fuel supply, said modeling chain not taking into account the variable of the electric power control loop taken into account in said steam pressure control loop as a disturbance;
• the pure delay ⁇ is taken into account in the vapor pressure control loop in the modeling chain of the transfer function between the fuel supply and the contribution to the vapor pressure of the fuel supply;
• the modeling chain of a transfer function between the fuel supply and the contribution to the vapor pressure of the fuel supply is of the form G-
• the vapor pressure control loop comprises a chain of determination of a control variable without disturbance to determine a control variable without disturbance from a steam pressure setpoint.
• control variable of the vapor pressure control loop is the fuel supply obtained by the output of the determination chain of the undisturbed control variable to which the output of the disturbance rejection chain is subtracted;
• the system comprises a determination of the chain without disturbance control variable, a disturbance rejection channel and a channel modeling of a transfer function between the fuel supply and the contribution to the vapor pressure of the feed fuel form
• the chain of determination of the undisturbed control variable is constituted by a transfer function taking as input a vapor pressure setpoint, which is a function of the type G-
• the vapor pressure control loop comprises a feedback loop without delay, to take into account, in determining the fuel supply, the part of said modeling chain of a transfer function between the fuel supply and the contribution to the vapor pressure of the fuel supply which is independent of the pure delay ⁇ ;
• variable of the pressure control loop taken into account in said electric power control loop as a disturbance is the vapor pressure
• the electric power control loop comprises an integral proportional regulator and a setpoint tracking disturbance and anticipation rejection chain to take into account a variable of the vapor pressure control loop as a disturbance;
• the opening of the regulating valves upstream of the turbine is obtained by the output of the integral proportional regulator to which is subtracted the output of the disturbance rejection and anticipation tracking system of the control loop of the electrical power ;
• Parameters of the control loop based on an internal model type control are estimated online by an adaptive control method, said adaptive control taking input variables of the control system.
• the invention proposes a thermal flame station comprising
• the invention proposes a method for controlling a flame thermal power plant according to the second aspect, in which:
• the vapor pressure is regulated by a control loop of a vapor pressure
• the electric power is regulated by an electric power regulation loop
• control loops being based on an internal model type control taking into account a pure delay ⁇ of one of the parameters of the internal model of the control unit, and for each of the control loops, a variable of a loop being taken into account as a disturbance in the other loop.
• Figure 1 is a synthetic scheme of a burning thermal power known to those skilled in the art
• FIG. 2 represents a superheated vapor pressure regulation diagram P according to a first embodiment of the system according to the invention
• FIG. 3 represents a superheated vapor pressure regulation diagram P according to a second embodiment of the system according to the invention
• FIG. 4 is a scheme for regulating the electric power produced W corresponding to the two embodiments of the system according to the invention.
• FIG. 5 is an adaptive control scheme corresponding to the first embodiment of the system according to the invention.
• 6A and 6B are graphs of temporal evolution of multiple sizes in response to an electrical power output level for comparison purposes between a control system according to the first embodiment of the invention and an H-type system ⁇ .
• the present invention is described in detail below in the particular but not limiting context of a control system of a coal-fired power plant.
• FIG. 1 is a synthetic and simplified diagram of a flame thermal power station 100.
• the arrows with a solid line 107 represent the circulation of the working fluid in both the liquid and the gaseous phase.
• This working fluid is a heat transfer fluid which is most often water.
• the working fluid is water in the present description.
• the simplified operating principle is as follows.
• the fuel supply GC causes the transport of the fuel to the assembly 1 02 including the boiler 1 03 and its auxiliaries.
• the fuel undergoes a treatment, then the combustion proper.
• the combustion of fuel to generate heat represented by the white arrows 105, which is especially transferred to the water which circulates in the tubes of a heat exchanger 104.
• the water then passes to the vapor state.
• the balloon 106 separates the liquid water from the steam, the latter leaving in a set of superheaters 108.
• the superheaters 108 may be subject to additional water injections via the water injection system 1 10, one of which actuators allows QDSHT- overheat water desuperheating water injection control
• the temperature and the pressure of the water increase sharply.
• the water then changes to superheated steam.
• This steam is conveyed to the turbine 1 14, through regulating valves 112 located upstream of the first body of the turbine and whose opening is defined by the parameter SR. Between the control valves 112 and the turbine 114, the superheated steam has a temperature T and a pressure P.
• the steam undergoes a relaxation, relaxation that allows the rotation of the turbine wheels.
• the water then returns to the system 108, through a reheater, before joining the medium pressure body MP, then the LP low pressure body of the turbine.
• MP and BP bodies a similar phenomenon of relaxation allows also the rotation of the wheels of the turbine 1 14.
• the rotation drives the electric alternator 116, thereby producing an electric power W.
• the expanded steam having passed through the turbine is admitted into the condenser 118, where it is cooled. It then goes into a liquid state and can start a new cycle.
• the GC fuel supply has oscillations during high power demands, which results in a high load on the boiler 1 03 and the depollution devices present at the outlet of the boiler 103.
• the invention makes it possible to obtain a fuel supply which does not cause stresses on the boiler and too strong depollution devices in order to prolong their service life. Moreover, the invention makes it possible to circumvent the problems inherent in the presence of a delay resulting from the routing, the treatment and the possible heating of the fuel.
• control system relates to a coal-fired power station whose operation corresponds to FIG. 1 described above.
• the system to be controlled is of multivariable type.
• the entries of this system are:
• W therefore linearly depends on the opening of the control valves SR and the steam pressure P, superheated vapor pressure in this embodiment.
• the coefficients a and b are coefficients defined according to experimental considerations, the characteristics of the thermal power station and according to considerations of safety, efficiency and service life of the installations. For example, a and b can respectively have as possible values 0.77 and 3.4.
• a superheated steam pressure control loop 200 shown in FIG.
• a control loop 400 of electric power W shown in FIG. 4.
• each of the control loops 200, 400 a variable of one loop is taken into account as a perturbation in the other loop.
• each of said loops comprises a control variable whose action can regulate the behavior of the plant.
• FIG. 2 thus represents a regulation loop 200 of superheated steam pressure P corresponding to the first embodiment of the invention described.
• the regulation loop 200 comprises a disturbance rejection chain 202, a chain of determination of the disturbance-free control variable 204 and a modeling chain 206 of a transfer function H G C-PI between the GC fuel supply. and the contribution P1 to the vapor pressure P of the GC fuel supply.
• disturbance rejection chain is understood in the present description a control loop element taking into account its entry a variable considered as a perturbation in said control loop in order to reject, that is to say of to overcome its effect, by taking into account upstream of the determination of the control variable of said control loop.
• the regulation loop 200 has as input the reference pressure P RE F as a set pressure, the value of which is in particular fixed according to the characteristics of the thermal power plant and according to considerations of safety, efficiency and duration of operation. life of the installations.
• the control loop 200 outputs the superheated steam pressure P and takes into account as disturbance to reject the opening of the control valves SR upstream of the turbine 14.
• FIG. 2 In the block diagram of FIG. 2 is represented a real chain 208 whose transfer functions H G C-PI and H S R-P2 represent the actual operation of the installations of the thermal power station 100 as described in FIG.
• This representation of the actual chain 208 decomposes the superheated vapor pressure P into two components P1 and P2.
• the first component of the pressure P1 is the component dependent on the GC coal feed which does not take into account the opening of the regulating valves SR.
• P1 represents the contribution of the steam supply pressure GC fuel P.
• the second composed nte P2 pressure is component dependent on the opening of the control valves SR.
• P 2 thus represents the contribution of the opening of the regulating valves SR to the vapor pressure P.
• the actual channel 208 here is composed of two transfer functions.
• the transfer function H GC -PI is the function linking the supply of fuel GC to the contribution P1 thereof to the vapor pressure P.
• the transfer function H S R-P2 is the function linking the opening of the regulating valves SR to the contribution P2 thereof to the vapor pressure P.
• the modeling chain 206 models the H GC -PI transfer function between the coal feed GC and the contribution P 1 to the steam pressure P of the coal feed GC. This modeling chain 206 does not take into account the opening of the control valves SR which comes from the control loop 400 of power W.
• the regulation loop 200 of vapor pressure P takes into account a pure delay ⁇ .
• the pure delay ⁇ between the coal feed GC and the pressure P is taken into account in the modeling chain 206 of the transfer function H GC -PI between the coal feed GC and the contribution P1 to the vapor pressure P of the GC fuel supply.
• the modeling of the transfer function H GC -PI is of the form G ⁇ s) ⁇ e " ⁇ s , with G ⁇ s) a stable, first-order, invertible function.
• the functions having for variable are Laplace transforms.
• the output quantity of the modeling chain 206 is subtracted from the vapor pressure P to obtain the input of the disturbance rejection chain 202.
• the chain of determination of the commi nable variable without disturbance 204 is constituted by a transfer function taking as input a reference steam pressure reference P RE F, function of the type G ! 1 (s) ⁇
• the disturbance rejection chain 202 is constituted by a transfer function G ⁇ is) ⁇ F 2 (s), with F 2 (s) a filter of the type -, with ⁇ . > 0
• a reference pressure reference P RE F passes through a transfer function of the type G 1 (s) - F 1 (s), and is subtracted from the output of this transfer function, the output of the disturbance rejection chain 202.
• the resulting fuel supply GC is then taken as input to a transfer function H G C-PI, the output of which is added together with the output of a transfer function H S R-P2 taking as input the opening of the valves SR regulators.
• FIG. 4 represents a control loop 400 of electric power W corresponding to the embodiment described.
• the electric power control loop 400 comprises an integral proportional regulator 402 and a setpoint tracking disturbance and anticipation rejection channel 404.
• the regulation loop 400 takes as input the electrical power setpoint W RE F, the value of which is fixed in particular as a function of the load of the plant and the electricity demand, and also according to the physical characteristics of the plant.
• the control loop 400 outputs the electric power W and takes into account as a disturbance the superheated vapor pressure P, which is a variable of the regulation loop 200 of vapor pressure P.
• the block diagram of FIG. 4 shows a real chain 406 whose functions represent the actual operation of the installations of the thermal power station 100 as described in FIG. 1 in the form of a transfer function H S RW between the opening regulating valves SR and the electric power W.
• Integral proportional regulator 402 thus takes as input the difference ⁇ between the electric power setpoint W RE F and the electric power W produced by the control unit.
• a rejection and disturbance and setpoint tracking prevention chain 404 has as input the reference electric power setpoint W RE F and the vapor pressure P, the latter variable being taken into account as a disruption to be rejected. .
• the opening of the regulating valves SR upstream of the turbine 1 14 is obtained by the output of the integral proportional regulator 402 to which is subtracted the output of the disturbance rejection and anticipation tracking system 404 of the control loop. regulation 400 of the electric power W.
• the electric power regulation W represented by the control loop 400 is thus effected by antici pations on the power setpoint W RE F and the superheated steam pressure P. Indeed, the equation governing the behavior of the electric power shows that there is no dynamic effect.
• a regulator PI takes as input an electric power reference reference W REF to which the electrical power W is subtracted; this regulator makes it possible to reject modeling errors of the electric power W.
• the reference electric power setpoint W REF to which the vapor pressure P multiplied by b is subtracted, is also divided by the coefficient a in a setpoint rejection disturbance and anticipation rejection chain 404.
• the opening of the control valves SR is an input for a transfer function H S RW of the system to be controlled and which has the output of the electric power W.
• control system that describes the invention is based on models of the process implemented in a thermal power plant flame.
• the different parameters of these models can be derived from on-site measurements.
• the transfer function H S RW of the generated electric power W it is possible to use the least squares method.
• the present invention further has the advantage of allowing the application of the adaptive control, as illustrated by Figure 5 described below, the control loop 200 of vapor pressure P.
• the online estimation of the parameters can be done for example by the method ARX (of the English Auto Regressive model with eXternal inputs for autoregressive model with external inputs).
• the control of the temperature of the superheated steam T is carried out by a regulator of type H ⁇ , because the dynamic modeling of the temperature is unreliable.
• the intrinsic robustness of the H régulateur controller is therefore interesting in this case.
• a second embodiment of the present invention corresponds to a system equivalent to that described in the first embodiment, substituting for the regulation loop 200 of vapor pressure P shown in FIG. vapor P shown in FIG. FIG. 3 thus represents a superheated steam pressure regulation loop 300 corresponding to a second embodiment of the invention described below.
• the regulation loop 300 includes a disturbance rejection chain 302, a control variable determination chain 304, a modeling chain 306 of a transfer function H GC -PI between the GC fuel supply and the contribution P1 at the vapor pressure P of the fuel supply GC and a return loop without delay 316.
• the regulation loop 300 has as input the reference pressure P RE F as a set pressure whose value is set in particular according to the characteristics of the thermal power plant and according to considerations of safety, efficiency and duration of operation. life of the facilities.
• the regulation loop 300 has the output of the superheated vapor pressure P and considers disturbance to reject the opening of the regulating valves SR upstream of the turbine 1 14.
• a real chain 308 of which the functions H G C-PI and H S R-P2 represent the actual operation of the installations of the thermal power station 100 as described in FIG.
• This representation of the actual chain 308 decomposes the superheated vapor pressure P into two components P1 and P2.
• the first component of the pressure P1 is the component dependent on the GC coal feed which does not take into account the opening of the regulating valves SR.
• the second component of the pressure P2 is the component dependent on the opening of the regulating valves SR which does not take into account the GC coal feed.
• the actual chain 308 here is composed of two transfer functions.
• the transfer function H GC -PI is the function relating the power in GC fuel P1 contribution thereof to the vapor pressure P.
• the transfer function H S R-P2 is the function linking the opening of the regulating valves SR to the contribution P2 thereof to the vapor pressure P.
• the modeling chain 306 models a H GC -PI transfer function between the GC coal feed and the P 1 contribution to the steam pressure P of the coal feed GC.
• This modeling chain 306 does not take into account the SR variable that comes from the power control loop 400.
• the regulation loop 300 of vapor pressure P takes into account a pure delay ⁇ .
• the pure delay ⁇ is taken into account in the modeling chain 306, which is the model of the transmission function H G C-PI between the GC fuel supply and the P1 contribution to the pressure. steam P of the GC fuel supply.
• the modeling of the transfer function H G C-PI between GC and P1 has the form G ⁇ s) ⁇ e " ⁇ s with G ⁇ s) a stable function of the first order reversal. However, it is split into two transfer functions G ⁇ s) and e " ⁇ s , G ⁇ s) located upstream of e " ⁇ s on the modeling chain 306, G ⁇ s) being the independent component of the pure delay ⁇ and e " ⁇ s the component corresponding to the pure delay.
• the output quantity of the modeling chain 306 is subtracted from the vapor pressure P to obtain the input of the disturbance rejection chain 302.
• the regulation loop 300 of pressure P comprises a feedback loop without delay 31 6 taking as input the quantity at the output of the transfer function G ⁇ s) of the modeling chain 306 corresponding to the component of the independent modeling of the pure delay ⁇ .
• This output quantity therefore has a value G ⁇ s) ⁇ GC (s).
• This latter value is subtracted by the feedback loop without retry 3 1 6 to the superheated vapor pressure press P RE F at the determination line 304 of the control variable.
• the disturbance rejection chain 302 models a transfer function R 2 (s) applied to the vapor pressure P.
• the transfer function R 2 (s) defines the response to disturbances.
• R2 (s) is the formula - M (s) - e- L s .
• the poles of M (s) are placed so as to obtain the desired dynamic.
• the control variable determining chain 304 takes as input the superheated vapor pressure setpoint P RE F. At the superheated steam pressure setpoint P RE F are subtracted the result of the chain of disturbance rejection 302 and the result of the feedback loop without delay 316.
• the GC fuel supply is obtained from the application of a transfer function R s) to the magnitude resulting from these comparisons.
• This transfer function R ⁇ s) of the control variable determination chain 306 defines the dynamics of the setpoint tracking and can be for example a PID type regulator (proportional integral derivative).
• This supply combusti ble GC passes through a transfer function H G C-PI of the system in order to give the input P 1 of the supply of GC fuel vapor pressure P.
• Opening the regulating valve SR passes through a transfer function H S R-P2 of the system to be controlled to give P 2 the contribution of opening the regulating valve SR to the vapor pressure P.
• GC fuel supply passes through a transfer function G ⁇ s), whose output is on the one hand returned by the delay loop 316 and without that mentioned above, and on the other hand is an inlet for a fontion transfer rate e "T s whose output is subtracted from the superheated vapor pressure P.
• the result of this subtraction passes through a transfer function R 2 (s) of the disturbance rejection chain 302 whose output is subtracted from the reference pressure value P ref, and that indicated above.
• FIG. 5 illustrates the possibility of implementing an adaptive regulation known to those skilled in the art in the context of the first embodiment. It presents non-reliably a possible application of an adaptive regulation to the control loop 200 of vapor pressure P.
• FIG. 5 thus presents an adaptive regulation taking as input variables of the system, possibly present in the control loop 200 of vapor pressure P, such as the GC fuel supply, the opening of the regulating valves SR, and the vapor pressure P.
• vapor pressure P such as the GC fuel supply, the opening of the regulating valves SR, and the vapor pressure P.
• the adaptive control can make an online estimation of parameters of the control loop 200 of vapor pressure P, for example those present in the transmission functions of the rejection and disturbance chain.
• the measurement of the input variables, carried out regularly, makes it possible to update the values taken by the parameters estimated online by the adaptive regulation.
• FIGS. 6A and 6B show a comparison between the responses of a coal-fired power plant controlled by means of the control system according to the first embodiment of the invention and of a control system according to type H régul regulators.
• FIG. 6A shows the comparison of the regulations according to the invention in solid lines and with the type H ⁇ regulations in broken lines in terms of the electric power produced W and the vapor pressure P, in response to power setpoint steps.
• W The system according to the invention allows a better power monitoring W, especially faster, while limiting oscillations.
• the vapor pressure P is better regulated insofar as it oscillates less with respect to a setpoint of 1 55 bar.
• FIG. 6B shows the comparison of the regulations according to the invention in continuous lines and with the type H ⁇ regulations in broken lines in terms of fuel supply GC and opening of the regulating valves SR in response to the same steps of FIG. electric power than in Figure 6A.
• the system according to the invention allows a significant reduction of the oscillations of the fuel supply GC. This quality of control reduces the stresses of the assembly 102 comprising the boiler 103 and its auxiliaries and allows an optimal exploitation of the pollution control organs.
• the regulation of the thermal power plant 100 by the system according to the invention is thus more dynamic while ensuring a lower load on the boiler 103.
• the invention proposes a thermal flame station comprising
• an assembly 102 comprising a boiler 103 and its auxiliaries subjected to a fuel supply GC to serve as a source of heat for a working fluid circuit so that it is in the vapor phase on a part of said circuit ,
• a turbine 114 fed by said steam at a pressure P of steam and at a temperature T, said turbine 114 being mechanically connected to an electric alternator 116 producing an electrical power W, the steam supply of said turbine 14 being determined by the opening SR of regulating valves situated upstream of said turbine 114,
• the invention proposes a method for controlling a flame thermal power plant according to the second aspect, in which
• the vapor pressure P is regulated by a control loop of a vapor pressure P, and
• the electric power is regulated by an electric power control loop W,
• control loops being based on an internal model control of the control unit, one of the control loops taking into account a pure delay ⁇ of one of the parameters of the internal model of the control unit, and for each of the control loops, a variable in one loop is considered as a disturbance in the other loop.
• the third aspect of the invention relates to any implementation of a control system according to the first aspect in a central unit. thermal flame, and any method of controlling a thermal flame plant implemented by the control method according to the first aspect.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Feedback Control In General (AREA)
• Control Of Steam Boilers And Waste-Gas Boilers (AREA)
• Control Of Turbines (AREA)

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