SU1539356A1 - System for automatic control of as-turbine plant - Google Patents

Abstract

The invention relates to automatic control of predominantly two-shaft and single-shaft gas-turbine installations (GTU) and allows to increase the reliability and efficiency of starting and loading GTU, as well as to ensure the operation of GTU in automatic mode with the maximum power with the best economic indicators with significant changes in external conditions. The low-pressure turbine (LPT) and high-pressure turbine (TVD) are controlled by servomotors 14 and 17 of supplying fuel to the LPD and TVD combustion chambers according to signals received through the first and second electromechanical converters 13 and 16 from the outputs of the electrical blocks 12 and 15 of the TND control and theater, respectively. The control action on the electric block 12 for regulating the TND is formed by the analog control block 23 and the relay-switching regulator 9 of starting and loading through the control block 10 and the control mechanism 11 comprising the electric motor 30 and the sensor 31 of the control action. The current task for the specified controllers forms a software setpoint 7 with a minimum signal extraction unit 24 based on signals from the start-up relay loading machine 8 and a control key 18, and the feedback signal is generated by the selection signal maximum signal 22 from sensors 1, 3 and 5 gas temperatures for TVD, rotational speed THAT HIGH ECONOMY. 1 IL.YU.A.RADIN.A.SALIHINA621.165ODIT FLOW RATE GROWTH, AFTER THAT RT is in the N zone of diffuser flow. In the N zone with the appearance of a positive pressure gradient @ P / @ X * 98 0, the boundary layer separates from the B 1 surface with the formation of a circulation vortex K. Vortex K occupies the space from B 1 to D 5, pushing the current line PT from the radial gap. This creates additional aerodynamic resistance to leakage of the RT, which increases the efficiency of the stage while maintaining the reliability of its operation. 4 images of the Kirillovn.a.tsalikh

Description

The invention relates to the automatic regulation of predominantly energy gas turbine plants (GTU).

The purpose of the invention is to increase the reliability of the system, and, consequently, to increase the reliability and efficiency of the automatic start and loading of the GTU, as well as to ensure the operation of the GTU in automatic mode with the maximum output power with the best economic indicators with wide variations in external conditions.

Figure 1 shows the structural diagram of the automatic control system of a gas turbine installation; Fig. 2 is a diagram of the operation of the software setter with a minimum signal selection unit; FIG. 3 is a graph of the formation of the current task signal; figure 4 is a graph of the dependence of the signals of the current parameter from the mode of operation of the gas turbine unit (type GT-100); Fig. 5 is a block diagram of the joint operation of the analog-regulating unit, the pulse-linear controller and the electric unit for regulating the low-pressure turbine (LPT); Fig. 6 is a diagram of the joint operation of a temperature limiter for gases behind a high-pressure turbine (TVD) and an electric TVD control unit. The automatic control system of the gas turbine plant (figure 1) contains in series connected sensor 1 of gas temperature for

high pressure turbine (HPT) and first converter 2 ,. sensors connected to the rotational speed of the rotor of the high-pressure turbine and the second transducer 4 connected in series, the sensor 5 of the gas temperature behind the low-pressure turbine (LPT) and the third converter 6, the programming unit 7, automatic relay

8 starting and loading with normally closed and normally open contacts, connected in series relay-switching regulator 9 starting and loading, control unit 10, control mechanism 11, low pressure turbine electric control unit 12, first electromechanical converter 13 and fuel servomotor 14 low-pressure turbine combustion chamber, in series connected electrical unit 15 for adjusting a high-pressure turbine, second electromechanical converter

16 and a fuel supply servomotor 17 to the combustion chamber of a high-pressure turbine, a control key 18 and a sensor

19 rotation speed of the low pressure turbine rotor connected to the second input of the low pressure turbine electrical control unit 12, the output of the first electromechanical converter 13 is connected to the second input of the high pressure turbine servo 17, the output of the high speed turbine rotor speed sensor 3 is connected to The first input of the electrical unit 15 for adjusting the high-pressure turbine; the first output of the control key 18 is connected to the second input of the control unit 10.

In addition, the system contains a serially connected master

20 gases behind the high-pressure turbine and a gas temperature limiter 21 behind the high-pressure turbine, a maximum signal extraction unit 22 connected in series and an analog control unit 23, a minimum signal extraction unit 24 and an output control unit 25 of the analog control unit 23 connected to the first the input of the pulse-pulse controller 9 start and loading, the second input of which is connected to the output of the analog control unit 23 and the third input of the electrical unit 12 of the control turbi low pressure, the third input to the output of the maximum signal extraction unit 22 and the first input of the analog regulating unit 23, the fourth input to the output of the minimum signal extraction unit 24 and the second input of the analog regulating unit 23, and the output connected

to the first input of the control unit 10 through the first normally open contact 26 of the relay start and loading automaton 8, the output of the first converter 2 is connected to the second input of the gas temperature limiter 21 behind the high-pressure turbine and the first input of the maximum signal extracting unit 22, the second input of which is connected to the output of the second converter 4, and the third input through the second normally open contact 27 of the relay of the automatic starting and loading 8 - to the output of the third

five

0

The converter 6, the output of the program setting device 7 is connected directly to the first input and through the third normally open contact 28 of the relay start and loading automat 8 to the second input of the minimum signal extraction unit 24, the second output of which is connected through the normally closed contact 29 of the relay automaton 8 of starting and loading to the first input of the software setting device 7, the second input of which is connected to the output of the starting and loading relay 8, and the third input to the second output of the control key 18, the output of the limiter 21, the gas temperature behind the high-pressure turbine is connected to the second inlet of the electrical unit 15 for controlling the high-pressure turbine.

The control mechanism 11 comprises a motor 30 and a control action sensor 31, the motor 10 being controlled by the control motor 10, which is a thyristor control unit, and the relay pulse controller 9 start-up and loading, containing the first adder 32 of the input signals and the first functional converter 33 connected in series with it, which together with the control mechanism 11 forms the proportional-integral law regulation.

Electrical control unit 12 TND contains the first unit 34 0 frequency measurement, the second functional transducer 35, which forms a proportional law of rotational speed of the rotor TND with a given irregular-5, the first summing amplifier 36, and unit 34 converts the signal from the sensor 19 of the rotor speed The low-voltage signal, the current signal of the amplifier 36 is converted in the electromechanical converter 13 into the oil pressure signal of the hydraulic part of the control and thereby controls the servo motor 14 of the top supply willow combustor servomotor 17 and the LPT fuel into the combustion chamber LDP.

The electrical TVD control unit 15 comprises a second frequency measurement block 37, which converts

five

0

five

the signal from the transmitter rotor speed rotor 3, the third functional converter 38, which forms a proportional control law for the rotation of the rotor theater rotor with a given unevenness, the second summing amplifier 39, the current signal of the amplifier 39 being converted into an oil pressure signal of the hydraulic part of the regulator 39 which controls only the servomotor 17.

The gas temperature limiter 21 for the TVD contains the second adder 40 of the input signals and the fourth functional converter 41, which forms a proportional law for regulating the temperature of the gases behind the TVD with a given irregularity, with the adder 40 summing the signal from the gas temperature sensor 1 for the TVD and the signal from the gas temperature setting unit 20 for the turbofan, and the output current signal of the limiter 21 is summed and amplified in the amplifier 39 with the signal of the converter 38. Each of the three channels of signal processing of the maximizer separation unit 22 The signal contains a scaling unit, a change in the constant component summed with the input signal, and a signaling device with a logic output, which is used in the process signalization circuit (not shown).

Each channel of the minimum signal allocation unit 24 contains a scaling organ, a body varying organ summed with the input signal, an input signal damping organ, and a device

0,

0

0

five

signaling with a logic output (not shown), and the logic output of the signaling device is connected via the channel 29 of the relay automaton 8 to the control circuit of the programming unit 7 via the signal processing channel of the second input.

The analog control unit 23 contains the third adder 42 of the input signals and the fifth functional converter 43, which establishes the proportional-integral-differential control law, and the output current of the unit 23, also the current of the converter 43, is summed and amplified in the summing amplifier 36 with the signal from the converter 35 and the sensor 31 of the control action, as well as the output current of the block 23 is summed in the adder 32 of the regulator 9 with the signal from the setpoint 25 of the output current of the analog regulating block 23 and ignalami by blocks 22 and 24. I

In addition, the system contains devices 44, 45 and 46 of continuous control with alarm devices, and the device 44, which controls the temperature of gases outside the TVD, provides a relay signal to the circuit of the relay automaton 8 about the termination of loading of the GTU.

The programming unit 7 is a precision integration unit. This unit performs reverse integration of the analog current input signal X / (t). At the same time, the operation modes of the unit integrator are controlled. The functional relationship between the input X, (t) and output YM (t) signal is as follows:

at PJ P, d 0 or PЈ P „1 (storage mode)

(t)

Y, + X, (t) dt, Ln 1

with FS 1 0 (forward integration mode)

m 1 p 0 0 (integration with ob j j, (t) dt, with p

 and about the military direction)

50 G

R

where TW is the integration time constant;

t is the integration time (time of the permissive signal)

Y0 is the value of Ya, at t 0;

RL is the logical (relay) signal for enabling integration in the forward direction;

m

55

- a logical (relay) integration resolution signal in the reverse direction. The maximum signal extracting unit 22 to the minimum signal extracting unit 24 are standard comparison blocks that are designed to extract the largest or smallest signal from the linear signal.

R

m

five

- logical (relay) integration resolution signal in the opposite direction. The maximum signal extracting unit 22 to the minimum signal extracting unit 24 are standard comparison units that are intended to extract the largest or smallest signal from the linear signal.

combinations of input current signals, for galvanic isolation of the circuits of all input, compared signals, as well as input circuits from the output. The block has three information processing channels, each of which contains a galvanic separation device and an adder, which has an asymmetrical characteristic and an additional logic output connected to the MCJKC signaling device

of In each channel, the possibility of adjusting the signal from either polarity from the inside of the voltage source. In the chain of signals X ((t) and Xa (t) on feeders with

constant time.

i

10 Functional dependent input and output signals:

 max. (x,), ffcUz), fs (x3) (

ft, with Y f; (x;) J run

n. // function block 22

4l JO, with Y f f; (X {)

 (XI) P fz (xa) fs (xj) G 1, with Y f, - (xj)

Q e (0, with Y jЈ (x,)

where 2,3 is the input number

signal;

f, x, (p), +) x2 (p) Xy (p) + xx (P) ... v V -. .R ;

(p) (p) + HZO (P),

Xn (p) current input signals;

FT () constants;

& Ј - input signal scaling factors;

Tm - constant damping times (s);

P is the Laplace operator;

Q, - logical (relay)

Y (p) + TDR) 1 + -t. p + p-} ҐЈ P) PID - the law of regulation of the block 23 Y (p) YЈ (p), p - the law of regulation for the block 21

 f

where K p - coefficient of proportionality;

Ti is a constant differentiation time;

Tu, is a constant integration time;

P is the Laplace operator;

T is a constant damping time.

Relay-pulse controller 9 is designed to form the PI-law regulation. The functional relationship between the input signal Yf (p) and the position Y (p.) Of the output organ

of In each channel, it is possible to introduce and adjust the bias signal of any polarity from the internal voltage source. The input signals X ((t) and Xa (t) include damping devices with adjustable

constant time.

i

Functional dependencies between input and output signals are:

to perform the functions of block 24

alarm output device.

Blocks 21 and 23 are standard analog control blocks, which are designed to form proportional (P), proportional-differential (PD), proportional-integral (PI), proportional-integral-differential (PID) control laws in automatic regulators with a regulating effect in the form DC electrical signal with the introduction of its limitation. The functional relationship between the input Y (p) and output Y (p) signals in the automatic control mode is:

45 of the actuator (in this case, the position of the control mechanism) is

0

Y (p)

where cr

 + 100%

em

Vc6

one

TIR

)

one

1 + Tr

Mr)

five

TG. -g 0. -equality coefficient

-speed of communication (rate of feedback compensation of the error signal);

t

ttr -

T is the time required to change the position of the regulating device (control mechanism) by 1,00%;

constant integration time; constant damping time; Laplace operator. The system works as follows.

The system begins to work when the relay automaton 8 is started and loaded. The automatic execution of the operations required at each stage begins. After completing the steps of ignition of the TVD and LPD combustion chambers, the relay automaton 8 sends the command to the control circuit of the software setpoint 7 and switches it on to the forward integration mode (signal PJ in Fig. 2). The signal Y2 ((Fig. 2) begins to grow with a constant integration time T.,. This signal is converted into block 24, after which it is the reference signal for controller 9 and block 23. The presence of block 24 with its Functional Capabilities allows To automate the process of forming the task signal depending on the operating modes of the GTU (see Fig. 2). Accepting the Yai signal at the first and second inputs, block 24 performs

12and

the function of converting the output signal depending on the mode of operation of the GTU. The graphically indicated dependence is shown in FIG. 3

Functional dependence has the following form.

When contact 28 is disabled,

U, xDr) + X10 (p)

t

WWH

(R)

(R)

x.Jp)

V20

where X, 0 (p), HGO (p),

X50 (P)

- settings.

In the graph of FIG. 3 is a broken line 47-48-49, i.e. value) can not exceed the value of HGO (p). The value of Hw (p) is therefore set equal to the setpoint of the GTU idling for controller 9 and block 23. In view of the fact that the launch to idling occurs according to the TV / 1 speed increase program, XCJ should correspond to the TVD rotor idling speed.

The value of X 0 is chosen equal to the revolutions of the TVD rotor and the opening of the servomotors 14 and 17 of the control valves for supplying fuel to the chambers of the TVD and LPT. I

When enabled, contact 28

el, Chl (p) + X) 0 (p) .- j OKHGY) VP

 thirty

T Chg1

five

In the graph of FIG. 3 is a broken line 47-50-51-52. Point 50 is the end point of the automatic 0 load GTU (from point 48 to point 50) and the transition to a manual maximum load (from point 50 to point 51). The change in the signal Ya, from 0 to point 53 occurs due to

5, the signal Pg- from the relay automaton 8 start-up and loading (see Fig. 2), a change in Y) from point 53 to point 54 occurs due to the influence of the control key 18 by the electric motor 30 of the control mechanism 11, i.e. from the manual influence of the operator of the GTU. The GTU is loaded according to the temperature of the gases behind the CTD; therefore, the value of Y and (p) at point 50 must correspond to the temperature at which the automatic loading stops.

Khao value should correspond to the maximum gas temperature

r for TVD and temperature of gases for TND. The selection of, and "must be determined by points 50 and 51, and point 51 must be as close as possible to point 52, in order to use

5 maximum range of YZ;).

The operation of the integrator of the software setpoint 7 depends on the operation of the block 24. Thus, when Y (Fig. 3) reaches the value at point 55, when

G, contact 28, turns on the second channel of the block 24s and, through its signaling unit, provides a relay signal Rm through the normally closed contact 29 (FIG. 2) to the integrator starting circuit in the reverse direction. But since the integrator has the command Pn from the relay machine 8, the change in Yy is stopped, thereby the integrator is forbidden from changing its signal. With

when contact 28 is turned off, the PM-i-ban ban is removed and the integrator again from command РЈ increases the value of U1 to the value at point 53, after which the command PJ is removed.

If the maximum load of the gas turbine unit is sustained, when the reference for the regulator 9 and block 23 is determined, for example, at point 51 (FIG. 3), when contact 28 is disconnected (load shedding), the value YWV) H (p) is instantaneous

decreases and is determined at point 56, ki is always an increase. tgv-guide has a complex the character of the change during the start becomes equal to the X20 - idleness, so it is connected only after the end of the automatic loading. When normalizing signals, i.e. bringing them to a unified direct current of 0-5 mA, due to the pre

Mu go GTU. The program unit 7 receives the command PM, which leads to a decrease in the value of Yz, to a value at point 55, when the command P disappears. Thus, the task is prepared for the next set of load after switching on the contact 28.

The presence of a damping link in the second channel of block 24 with a constant damping time T ™ allows you to change the task for controller 9 and block 23 from the key 18 of the motor control 30 not stepwise (with a constant time Ti and integrator with a maximum approximation to that pattern, with which the gas temperature changes when the control mechanism 11 is affected. Nearly the time of gas temperature change under the step action on the control mechanism 11 is 15-20 s, from which the value

Unveiling t 15:20 p. This contributes to a virtually unstressed transition from one mode of operation to another without interference from the regulator 9 and block 23.

The current parameter for controller 9 and block 23 is determined by block 22.

FIG. 4 shows a graph of the adjustable parameters when the maize is started.

Ј. (X,) X, + X „

fzUi). + X20 or W.Mac

fs (x3) + x30

According to this dependency: before the idle run, GTU - UMIX is Fri% d, at 5-10 MW YWMKC switches on .A and in Maximum mode

Ґmax depends on

L% (T & A

AND

loads

Tzitnd. This allows un-shock connection of various signals to the controller 9 and block 23b of the setting of the software setpoint 7.

ke and loading of gas turbines, where it is indicated: Tzi of the bodies of the temperature of gases for TVD; tza tna gas temperature for TND; PT6A - revolutions of the rotor TVD, depending on the mode of operation of the gas turbine unit. From the graph, it is clear that T3o, t & and Fri & d change monotonically to idle (x.x.) GTU, and when loading GTU from 0 to 100 MW, the RPM is stabilized and does not exceed 4100 rpm at 100 MW. TYAITYA has almost always growth. tgv-guide has a difficult

five

five

the nature of the change at start-up, so it is connected only after the end of the automatic loading. When normalizing signals, i.e. bringing them to a unified direct current of 0-5 mA, due to the advantage of 6 we get

0 educated 2, 4

one

X,

X, P

T5e, t & D - p20

one

tbd

3d T ON

1200 1 120

(mA); (mA); (mA).

In order to provide a comparison of signals at the maximum load of the GTU (100 MW) for Tia TLA and Trotil it is necessary that a change in load by a certain amount causes a change in signals X, and X, by the same value. The increment of GTU load on these modes corresponds to the same increment of the L-temperature beyond the turbines, therefore the gain factors ci, and about these signals in block 22 should be the same, i.e. equal to 1. But since the absolute value is lower than T} a t & A at 0 C, it is necessary to enter the constant component on channel X3. The functional dependency implemented by block 22 takes the form:

or W.Mac

Gg (g

 X,

 hg

f, (x) Xg

50

150 120

s

Relay-pulse controller 9, summing on the adder 32 signals from block 24, i.e. the task signal, and block 22, i.e. the current parameter, and depending on their mismatch using the functional converter 33, together with the thyristor control unit 10 and the control mechanism 11, forms a proportional-integral law of regulation of the current parameter.

The analog control unit 23 also summarizes on the adder 42 the signals from block 22 and block 24, and depending on their mismatch using the functional converter 43, converts the output unified current signal according to the proportional-integral-differential control law.

The presence of an interracial component in the transfer function of unit 23 causes the output current signal Y (p) to vary with a constant integration time Ti each time if there is a mismatch YЈ (p). With Ye (p) 0, i.e. when the current reference is equal to the current parameter, the output current of block 23 does not change.

For the most effective control it is necessary that with YЈ (p) 0 the output current Y (p) is at the level of the average value of its physical implementation, i.e. Y (p) varies from 0 to 5 mA, then this value should be at 2.5 mA. Therefore, a connection is introduced between the output current of the unit 23 and the adder 32 of the regulator 9. The sensor 25 connected to the input of the adder 32 determines the set value of the output current.

In view of this, the relay-trigger regulator 9 of starting and loading performs two functions simultaneously, i.e. It supports the specified value of the current parameter and the specified value of the output current of the unit 23. The operation proceeds as follows (see Fig. 5). Impact on the mechanism 11, control is not carried out if the condition for regulator 9 is fulfilled:

Wc (P + YMUH (P) + (P + V (P} where (p) is the current reference signal from block 22;

Vu and - from block 24; Y (p) is the output of the TV controller 23; (p) setpoint output current 2 If only the condition that

Ґmax (P) +) ° m-e K0r “a current parameter is equal to the current task, a Y (p) Y (p) / 0, i.e. If the output current of the block 23 is not equal to the specified value, then the control mechanism 11 is influenced by the regulator 9 for the purpose of setting the current task signal

RPI AND

the current output unit of block 23 is increased, i.e. the value of y (p). In this action, the control mechanism 11 appears to have a mismatch between the signals YMu | ((C (p) and YMMH (p)) since the reference does not change, and the fuel supply changes, which leads to a change in temperature, and therefore the current parameter. The output current of unit 23 starts to change in order to recover the error.

So, for example, the value of the output current of the block 23 was 3 mA permissible. Its specified value should be 2.5 mA. The mismatch is zero. The regulator 9 acts on the control mechanism 11 in the direction of addition, which leads to an increase in fuel consumption and an increase in the gas temperature, therefore the output current of the unit 23 begins to decrease in order to lower the temperature. If it reaches a value of 2.5, then the process of setting the current setpoint is stopped, if not, then everything repeats. Due to the fact that when setting the set value of the output current of the unit 23, the error between the current parameter and the current task is necessary, it is necessary to select the dead zone of the regulator 9 so that it does not react to this error.

The value of the output current of the electric TNT control unit 12 is expressed by the dependence (P) K; Yvnp (p) + (p) - KjYACiT (p), where X6bl) t (p) is the output current of the block 12;

To city

K - coefficients of proportionality for each channel of block 12;

Yvnp (p) is the control signal from control mechanism 1;

Y (p) is the output current of the analog control unit 23;

YACST (p) rotor speed sensor signal 19

tnd.

According to this dependence on the absence of a mismatch between the current parameter and the current reference, any change in the output current of the block 23 from its target value should

to be compensated by a signal from the control mechanism 11.

The choice of the coefficient Kg for the signal Y (p) is determined by the conditions of effective and safe regulation under the action of real disturbing influences. For example, for GTU GT-100, this corresponds to 5% of the total opening of servomotors for control valves for supplying fuel to the combustion chambers. For example, one hundred percent opening of servomotors corresponds to the value of the output current of block 12, i.e. HBY) ((p) equal to 700 mA, whence the value of Kg is calculated from the condition:

(p) 700 mA (5%).

Since at the start of the start of the GTU the task, i.e. the signal YMMH (p) corresponds to the revolutions of the TVD of the beginning of opening the servomotors 14 and 17 of the control valves, and the current parameter is absent, then the value Y (p) of the block 23 corresponds to its maximum value - i.e. 5% open servomotors. In order to ensure the complete closing of the control valves, it is necessary to shift the characteristic X0b1) ((p) of the block 12 from the control signal Yvf1p (p) towards the closure of the servomotors by 5%. (The amplifier 36 of the block 12 allows this) .

As the GTU turns, the current parameter YWttK (. (P) catches up with the current assignment Ywl (((p) and, if it is ahead, the signal Y (p) begins to decrease and can reach a zero value with a large mismatch; most of all, an automatic deceleration of the rotor of the turbofan engine at start-up is ensured, in which case the signal to reduce from the regulator 9 to the control mechanism 11 at the start is no longer necessary.

After the termination of loading of the GTU, when the growth of the task from block 24 stops, stabilization of the current parameter of block 22 begins at the expense of controller 9 and block 23. In this case, the automatic switchboard 8 switches on the control mechanism 11 and the controller 9 to add side and subtract. At the same time, the output current of the block 23 of its specified value is established.

When a disturbance occurs, it first comes into operation, i.e. begins to change the output current, the analog control unit 23. Regulus

Q

20 25 30

with 0

d

five

The torus 9 also comes into operation, but in terms of speed is much inferior, since, being a relay-pulse regulator, it must accumulate a sufficient mismatch to affect the control mechanism 11. Block 23 has practically no dead band, so it acts almost immediately and directly through block 12 on servomotors 14 and 17.

In case of small disturbances, the relay-impulse controller 9 may not affect the control mechanism 11 at all, and the analog control unit 23 works in any case. Thereby, a more accurate maintenance of the gas temperature setpoint is achieved, which cannot be achieved with a single relay of the pulse-voltage regulator. In case of large disturbances due to the limited effect of the block 23 on the servomotors 14 and 17, the relay-relay controller 9 performs the main control function.

The operation of the limiter 21 of the temperature of the gases behind the HPT is carried out as follows. The joint operation (FIG. 6) of limiter 21 with block 15 is determined by the dependence

Xvyh (P) K, (Ptvd-P, vl) + Cg-Krh

VP)

where X6Y) g (p) - output current unit 12;

K ,, Kr - the coefficients of proportionality of the block 15 through the appropriate channels;

P76D - revolutions of the theater rotor;

Pg.a „- setting-task on

revolutions of the theater rotor;

YE (p)

 T - -} aA

- T a „ANNS, the error signal at the input of the limiter

21;

Kp is the proportionality coefficient of unit 15. From the dependence it is seen that the change in output current of unit 15 is carried out automatically both with a change in rotor turns of the LDP and a change in temperature of gases behind the TVD. Thus, the distribution of fuel by the combustion chambers of the gas turbine plant is carried out not as before, by changing the setpoint-task for Pgao turns, but automatically when T changes.

The application of this system to a single-shaft unit of a gas-turbine installation allows a significant increase in the efficiency of the automatic control system. This system is also practically implemented on any single-shaft steam turbines that have similar automatic control devices.

Claims (1)

This system provides a more reliable and efficient start-up of gas turbines with the achievement of maximum power, with the best economic indicators with significant changes in external conditions. Invention Formula The automatic control system of a gas turbine plant, comprising a series-connected gas temperature sensor behind the high-pressure turbine and a first converter, a series-connected high-speed turbine rotor speed sensor and a second converter, a series-connected gas temperature sensor behind the low-pressure turbine and a third converter, software engine , relay automatic start and load with normally closed and normally open contacts, Relatively connected relay-. pulse start and load controller, control unit, control mechanism, low pressure turbine electrical control unit first electromechanical converter and servomotor for supplying fuel to the low pressure turbine combustion chamber, successively connected high pressure turbine electric control unit, second electromechanical converter and servo motor supplying fuel to the combustion chamber of a high pressure turbine, a control switch and a rotor speed sensor of a low pressure turbine Connected to the second input of the turbine electrical control unit low pressure output of the first electromechanical transducer connected to the second input of the servo motor high pressure fuel in the combustion chamber of the turbine, a high pressure rotor speed sensor output turbine is connected to the first input electric regulation unit five 0 / five 0 five 0 five 0 five A high pressure turbine, the first output of the control key is connected to the second input of the control unit, characterized in that, in order to increase reliability, it further comprises serially connected gas temperature setter behind the high pressure turbine and gas temperature limiter behind the high pressure turbine, sequentially connected the maximum signal extraction unit and the analog control unit, the minimum signal extraction unit and the setting unit of the output current of the analog control unit, Connected to the first input of the relay-pulse start-up and loading controller, the second input of which is connected to the output of the analog control unit and the third input of the electrical low pressure turbine control unit, the third input to the output of the maximum signal isolation unit and the first input of the analog control unit, the fourth input - to the output of the minimum signal isolation unit connected to the second input of the analog control unit, and the output is connected to the first input of the control unit through the first normal about. open contact of the relay start-up and loading, the output of the first converter is connected to the second input of the gas temperature limiter behind the high-pressure turbine and the first input of the maximum signal extraction unit, the second input of which is connected to the output of the second converter, and the third input through the second normally open contact of the automatic starting relay and loading - to the output of the third converter, the output of the software master is connected directly to the first input and through the third is normally open The contact of the relay starting and loading device is connected to the second input of the minimum signal selection unit, the second output of which is connected via a normally closed contact of the relay starting and loading device to the first input of the software sensor, the second input of the starting and loading relay, and the third input - to the second output of the control key; the output of the gas temperature limiter for turbo21153935622 This high pressure is connected to the control of a high pressure second turbine of the electrical unit laziness. R Xjffl S A AR. the scheme is confusing integrator in the opposite direction / v T regulator laziness. eight 52 B (" No. TTL Phage. 3 5t A