SU1710803A1 - Gas-turbine plant control system - Google Patents

Abstract

The purpose of the invention is to increase the reliability of the gas turbine unit (TTU). The system eliminates the supply of fuel to the combustion chamber when the ignition system is inoperative and stops the start and stops the GTU in the event of a flare extinguishing after the system is turned off, ignition. If at any time the ignition system is turned off (power supply unit 13 of the plasma torch 12) for any reason, the torch of the nozzle 4 is extinguished, the air pressure behind the compressor 1 drops sharply and a unit level signal is sent from the output of the inverter 18 to the first input of the element 21. At the same time, from the output of the element 21 through the delay unit 24, a signal of a single level is received at the electromagnetic actuator 6 and the check valve 5 closes, shutting off the fuel supply to the combustion chamber 2. If at the beginning of the supply of fuel to the combustion chamber 2 through the nozzle 4, i.e., when the output signal of the threshold device 10 forms a unit level signal, there is no arc in the plasma torch 12 for any reason, then at the third input of the element 21 unit level signal. As a result, a unit level signal is generated at the output of the element 21 and at the output of the delay unit 24, which turns on the electromagnetic actuator 6, stops the supply of fuel to the combustion chamber 2 and stops the GTU. Such an implementation of the system makes it possible to increase the reliability of its operation. 1 il. Sub mon / tufa Ј vJ "& about with

Description

 1710803 .. - ...

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The invention relates to an engine-building signal of a zero level, at the exit is Elenia, specifically to the gas control systems And 20 also a signal of zero is generated.

turbine units (GTU) /: level, unit 13 of the plasma torch power supply

The purpose of the invention is to increase the reliability-works. Until the moment of operation of the poron of the operation of the system. The device 10 from the output of the inverter 11

The drawing shows the structural input of the electromagnetic actuator 6 poschema system. step signal of a single level ,, locking., -.

The control system of the gas turbine plant, which has a gas valve 5, is closed; the fuel is not fed to the for-turbine engine with compressor 1, and the ka-4 is not supplied. Upon reaching the time of 2 combustion and the turbine 3, the fueling power of rotation, at which

a system with a nozzle 4 installed in the 1Q is reliable, the operation of the plasma torch 12, from the output, measure 2 of combustion and associated with the shut-off threshold device 17 connected with C; yes-t- valve 5 with an electromagnetic actuator 6, a trick 9 of the operating mode {with a frequency sensor contains a series-connected start-up rotation), a signal is received .. single. The forging device 7 and the memory element 8, each at the second input of the element I 20, with the successively connected sensor 9 of which mode-jg, at the same time, receive a work-gas-turbine installation signal, the first unit level for switching on the system, the threshold device 10 and the first inverted ignition. On the plasma torch 12, the originator 11. The GTU also has a system of electric arc igniting, in the presence of a plasma generator 12, installed at the output of the signal generator 14, there is a single level signal in the combustion chamber 2 connected to the arc unit 13 , supplying the plasma torch with a detector 14 20a at the third input of the element I 21 is a signal of the presence of an arc of the plasma torch, and the system is of a zero and zero level.

In addition, it contains an air pressure sensor 15. When the rotational speed is reached,

at the outlet of the compressor, the second 16 and the third 17 which, in accordance with the launching devices, the second 18 and the third 19, with the characteristics of the GTU can be fed the top-inverters, the first 20 and the second 21 elements 25vo to the combustion chamber 2, from the output of the threshold

And, the first 22 and second 23 elements of the OR device 10, connected to the sensor 9 and the retainer pressure operation unit 24, are outputted by a single signal

The output of the memory element 8 is connected kurovn to the second input of the element I 21 and to

the first input of the first element And 20, the output of the inverter 11, where it is converted

which is connected to the input of the block 13, a signal in the zero level and then enters

neither; plasma torch, and the second input.: - To the output 30 to the input of the electromagnetic actuator 6 of the third threshold device 17, the inlet valve 5. The electromagnetic shock is connected to, the output of the sensor 9 of the river 6 turns off and opens the shut-off

press of the gas turbine unit, the output of the sensor 15 pressure -..... valve 5. Fuel through the nozzle 4 Posto-. Neither the air at the compressor outlet connects to the combustion chamber 2, where it is ignited to the entrance of the second threshold device, with the aid of an arc of the plasma torch 12.

... wa 16, the output of which is connected to the first 35 At a certain air pressure

the input of the second element OR 23 and the inlet of the output of the compressor 1, corresponding to

the second inverter 18, the output of which, the sub-frequency of rotation of the engine, at which

 the keys to the first input of the second element are provided with sufficiently reliable conditions; 21, the second input of which is connected to the output of the combustion of fuel coming in through

the first threshold device 10, a three-stage injector 4, from the output of the threshold device input to the output of the third inverter 19, va 16, a single level signal is output,

and the output is connected to the input of the delay unit 24, the output of which is fed to the second input of the element which is connected to the second input of the second memory 8 and disconnects it, while

of the element OR 23 and the first input of the output of the memory element 8, a sig is formed. element OR 22, the second input. Which is zero level. Simultaneously signal

connected to the output of the first inverter 11, 45from the threshold device, converting into and the output - to the input of the electromagnetic at-inverter 18 into the zero signal, about 6 of the shut-off valve 5, the output is second to the first input of the element 21. In the element OR 23 is connected to the second input result at the output of the element AND 20 forms the memory element 8, the input of the third inverts the zero signal, and the unit 13 of the torus 19 is connected to the output of the plasma torch signaling memory. At the same time, the presence of the plasma arc in the arc is 14. The system operates as follows at the input of the arc 14. Inverter 19 receives a zero signal. When the gas turbine unit starts, a pulse level is applied, where it is converted into a single signal from the trigger 7 (button). Electric starters (not shown) of element I 21 enter the third input. However, at the element output, the rotor of the gas turbine and 21 begin to unwind, and a zero motor signal is generated. At the same time, the pulse level, since the signal arrives at its first input is memorized by the memory element 8 and signals the zero level from the inverter 18. At the first input of the element 20, a signal arrives. The presence of the delay unit 24 warns of a single-level signal. To the second input, the transmission of spurious signals to the stop of the mentor AND 20 from the threshold device 17 of the post-GTU provides; normal continuation of the start-up when the ignition system is switched off.

If at the moment of switching off the ignition system (plasmatron power supply unit 13) for any reason the torch 4 goes out, the air pressure behind compressor 1 drops sharply from the output of the inverter 18 to the first input of the element. And 21 receives a single level signal. At the same time, from the output of the element 21, through the delay unit 24, the signal of the unit level is sent to the electromagnetic actuator 6 and the shut-off valve 5 closes, shutting off the fuel supply to the combustion chamber 2. GTU is stopped.

If at the beginning of the fuel supply to the combustion chamber 2 through the nozzle 4, i.e., when the output signal of the threshold device 10 forms a single level signal, there is no arc in the plasma torch 12 for any reason, then a single level signal is generated. As a result, a unit level signal is generated at the output of the element 21 and at the output of the delay unit 24, which causes the electromagnetic actuator 6 to be turned on, the fuel supply to the combustion chamber 2 is stopped and the gas turbine unit stops. At the same time, the output signal of the delay unit 24 is fed to the second input of the element 8 memory and turns it off, while disconnecting the power supply unit 13 of the plasma torch 12.

Thus, in the GTU, the fuel supply to the combustion chamber is eliminated when the ignition system is inoperative, and the GTU is stopped and stopped in the event of a torch extinguishing after the ignition system is turned off. The latter is achieved without the use of any special flame indicators, which makes it possible to significantly simplify the GTU control system and increase its reliability by eliminating the possibility of false alarms typical of the flame indicators in GTU starting modes.

Claims (1)

The invention The control system of a gas turbine plant with a compressor, a combustion chamber and a turbine, a fuel system with a nozzle installed in the combustion chamber and connected to a shut-off valve with an electromagnetic actuator, containing a serially connected starting device and a memory element sequentially connected to the sensor of the gas turbine unit the first threshold device and the first inverter, characterized in that, in order to increase the reliability of the gas turbine plant having a reproducing system ameneni a plasma torch installed in the combustion chamber associated with the supply unit of the plasma torch with signaling the presence of the arc of the plasma torch, it further comprises an air pressure sensor at the compressor outlet, the second and third threshold devices, second and third inverters, first and second 20 elements AND, the first and second elements OR and a delay unit, the output of the memory element is connected to the first input of the first element AND, the output of which is connected to the input of the plasmatron power supply unit, and the second input to 25 to the output of the third threshold device, the input of which is connected to the output of the sensor of the operating mode of the gas turbine installation; the output of the air pressure sensor at the compressor outlet is connected to the input of the second threshold device, the output of which is 30 keys to the first input of the second OR element and the input of the second inverter whose output is connected .to the first input of the second element I, the second input of which is connected to the output of the first threshold device, the third input to the output of the third inverter, and the output to the input of the delay unit whose output It is connected to the second input of the second OR element and the first input of the first OR element, the second input of which is connected to the output of the first inverter, and the output to the input of the electromagnetic actuator of the gate valve, the output of the second element OR is connected to the second input of the memory element, the input of the third inverter is connected to the output of the detector of the arc of the plasma torch. 35 0