SU1416718A1 - Control system for heat and power turbine - Google Patents

Abstract

The invention relates to a power system and makes it possible to improve the accuracy of turbine control by optimizing the switch to the operating mode according to the thermal schedule. The element 10 for generating the steam flow rate function in the low pressure part (PND), including the multiplication unit (B) 11, the position sensor for the servomotor of the LPD regulating valves, the vapor pressure sensor 13 in the selection, and the vapor pressure sensor 14 are connected in series connected by summing B 9, relay B 8, regulating B 7, and drive mechanism 6. When the steam flow rate changes in the low passive value relative to a critical value, polarity B 8 changes. As a result, switch 5 moves to the position corresponding to the operating mode turbines either by electrical or thermal graphics. This embodiment allows you to get fuel savings in the period of work on any schedule with a peak source of heating network water and with any steam consumption in the PND. I il. S (L with

Description

ABOUT)

oo

mizatsiya switching to the mode of operation on thermal schedule.

The drawing shows a diagram of the regulator system.

The invention relates to heat and power at the output of the relay unit 8 has also and can be used when the control polarity, which leads to the transfusion of operating modes of the heating unit of the switch 5 to

turbines. corresponding to the mode of operation of the turbine

The purpose of the invention is to increase the point-in-time electrical graph (in the drawing, the turbine control is adjusted by means of an optical down position). At steam consumption in

PND, less Ocr, the signal at the output of the relay unit 8 has polarity, causing the switch to move to a position corresponding to the operating mode of the tour. The circuit contains regulator 1 speed 0 bin according to the thermal graph (in the drawing - and regulator 2 pressure pair in the selection, to the top position). At the same time, the servo-servomotor 3 control valves

high pressure (PNP) of the turbine and servo-to-down position with minimum promoter 4 control valves with a partial steam flow in PND. Servo pressure control (PND), switch 5 5 by motor 3 valves of CVPs are carried out to ensure the operation of the turbine as preregulator 1 speed and regulator 2 pressure electric, and on tegtle gravel with unevenness, defined pofiku with minimum steam consumption in part switch 5 in low pressure mode, drive mechanism 6, thermal graphics bots, equipped with a control unit with start-up; When the heat load decreases, the chopper 7, relay unit 8 and total-20 turbine transfer mode unit 9, the element 10 forms a thermal graphic for the operation mode of the steam flow rate function in the PND, which includes the multiplication unit 11, the position sensor for the servomotor of the PND adjusting valves, the pressure sensor 13 for steam 25 and the pressure sensor 14 steam in the condenser.

Claims (1)

The system works as follows. The impulse on the vapor pressure in the controlled extraction from the output of the sensor 13 and the impulse on the position of the servomotor 4 30 valves of the PND from the output of the sensor 12 go to the inputs of the block 11 multiplying the element 10, the output of which occurs. The heating control system is a signal corresponding to the value of the flow turbine, containing the skimming regulators in the PND. This signal from the output of the steam supply and pressure, connected to the multiplication circuit 11 of the element 10, receives 35 motors of control valves of the parts to the input of the summing unit 9. The signal from the high and low pressure turbines of the sensor of the vapor pressure 14 in the condenser, to the input of the summing unit 9 with opposite polarity, corresponds to the value of OCC of the critical steam flow rate in the PND. The signal at the output of the summing unit 9, corresponding to the difference between the consumption of the Omml steam in the PND and the critical consumption of steam in the PND, is fed to the input relay block 8; from the last output, 45 pressure and multiplication unit, the datum when OCP becomes equal to Ocr, the positioning of this servomotor and the sensor sends a signal to the input of the actuator 7, from the vapor pressure in the selection is connected to the stroke the input the inputs of the multiplication unit, the output of which mechanism 6, which moves the switch and the vapor pressure sensor in the capacitor switch 5. As long as the flow rate is connected to the inputs of the regulating unit in the PND more critical, the signal 50 ka. according to electrical graphics with steam extraction, it is performed manually by acting on switch 5. The proposed system allows you to save fuel during the period of work on both electric and thermal graphics with a peak source of heating network water and with steam consumption in the low-pressure rating of Ochnd Okr. 40 a cut switch equipped with a driving mechanism with a regulating unit and a steam pressure sensor in the selection, characterized in that, in order to increase the turbine control accuracy by optimizing the switch to the thermal schedule, the steam pressure sensors in the condenser and the servo motor position are inserted into the system valve parts low  military transfer of the turbine from the thermal schedule operation mode to the operation mode Invention Formula according to electrical graphics with steam extraction, it is performed manually by acting on switch 5. The proposed system allows you to save fuel during the period of work on both electric and thermal graphics with a peak source of heating network water and with steam consumption in the low-pressure rating of Ochnd Okr. The heat turbine control system, which contains speed and steam pressure regulators, is connected to the servomotors of the control valves of the high and low pressure parts of the turbine pressure and the multiplication unit, and the position sensor of this servo motor and the steam pressure sensor in the selection are connected to the inputs of the multiplication unit, the output of which and the steam pressure sensor in the condenser are connected to the inputs of the regulating unit. a cut switch equipped with a driving mechanism with a regulating unit and a steam pressure sensor in the selection, characterized in that, in order to increase the turbine control accuracy by optimizing the switch to the thermal schedule, the steam pressure sensors in the condenser and the servo motor position are inserted into the system valve parts low