SU1343037A1 - Control system for turbine heat load - Google Patents

Abstract

The invention improves the reliability of the turbine. For this output 15, More regulator 11 of available heat load is connected to the input of the controlled contact 13 of the relay element 14, and through it the drive 5 is connected to the output 12 More regulator 9 of the consumed heat. When the cause of the unacceptable increase in the heat load of the turbine is eliminated, and as a result of this, the power of the pre-selection compartment to a value less than the minimum, output 15 produces a signal that triggers element 14 and closes contact 13. Signal output 12 goes to input 6 Open . actuator 5 of the regulator 4. At the same time, the value of the parameter set by the heat consumer increases and at the same time the power reserve of the pre-selection compartment decreases. This process continues until the value of the thermal parameter becomes equal to the set value or the power of the pre-selection compartment takes on a value equal to the minimum value. 2 Il. P i (L IS e-ta 12 Oe 4 with about with 001. T Parc kenjiotpfiuno telitelp

Description

The invention relates to a power system and can be used to automate turbines with steam extraction, equipped with an out-of-turbine regulator installed on the steam line between the steam extraction chamber and the heat pump consumer on the bypass line of the preheater.

The purpose of the invention is to increase the reliability of the turbine.

Figure 1 shows a diagram of a turbine heat load control system with a regulator mounted on the steam line between the steam extraction chamber and the heat consumer; figure 2 - the same, with the regulatory authority, installed on the bypass line of the heater on the network water.

The turbine heat load control system (Fig. 1) comprises a steam turbine 1 with a steam pipe 2 connecting the selection chamber 3 with a heat consumer (not shown). On the steam line 2 there is a regulating authority 4 with a drive 5 having inputs 6 and 7 Open and Close respectively. Input 7 Close drive 5 of the regulator 4 is connected to output NJ, where N, and N, are the minimum and maximum power of the compartment, respectively; at outputs 10 less and 15 there are no more signals than regulator 11. If the power of the pre-selection bay is less than N, a signal appears at output 15 of More Controller 11. The system operates in 25 mode of stabilization of the parameter set by the heat consumer. In this mode, as a result of the operation of the relay element 14, pin 13 connects output 12 More regulator 9

with stroke 8 Less regulator 9, consumption of heat consumed with an input of 6 0 heat and with output 10 Less of a regulator 11 of available heat load. Output 12 More regulator 9 heat consumption connected

cover the drive 5 organ 4. With this

The regulator 9 of the consumed heat, receiving signals from the sensor 16 or 22 and the setting device 17, operates in the mode of sta- tion with input 6 Open the actuator 5 through the thermalization parameter of the thermally controlled contact 13 of the relay hook, affecting the actuator 5 cop 14, connected to exit 15

authority 4.

More regulator 11 available heat load.

As the pre-selection compartment increases in power to N, the signal at output 40 15 More regulator 11 of the available thermal load disappears, relay element 14 returns to its initial state, and opens contact 13, which turns off output 12 of BolC to sensor 16 input to consumed heat the parameter set by the heat consumer (for example, the vapor pressure in the sampling collector) and the setpoint 17. To the regulator input - 45 ° Regulator 9 of the available heat exchanger 11 - the available heat load from the input 6 Open the load There are sensors 18 and 19 of vapor pressure before and after the pre-selection compartment, respectively, characterizing the turbine mode parameter — gQ — the maximum power of the pre-selection compartment.

In the control system (Fig. 2), the regulator 4 is installed on the bypass line 20 of the preheater 21 connected to the steam line 2 through mains water. Regulator 9 consumed

heat is equipped with a temperature sensor 22- Less regulator 11 of the available rye of network water, which in this heat load a signal appears,

drive 5 of organ 4. This eliminates the possibility of increasing the power of the pre-selection compartment as a result of an increase in the amount of heat consumed (if this increase is necessary), i.e. the system enters the mode of limiting the heat load of the turbine. With an increase in thermal load of 55 turbine loads above the permissible value (with the power of the pre-selection compartment 7 N) at output 10

case serves as a parameter set by the heat consumer.

The heat load control system works as follows.

The available thermal load of the turbine is determined by the power of the pre-selection compartment. The signal about the available turbine heat load is formed at the output of the controller 11 of the available heat load depending on the pressure ratio before (signal at the output of sensor 18) and after (signal at the output of sensor 19)

pre-selection compartment. When power value N

Pre-selection compartment accepts

1 - NJ, where N, and N, - are minimal and limiting the power of the compartment, respectively; at outputs 10 Less and 15 More regulator 11, there are no signals. If the power of the pre-selection bay is less than N, a signal appears at output 15 of More Controller 11. The system operates in the mode of stabilization of the parameter specified by the heat consumer. In this mode, as a result of the operation of the relay element 14, pin 13 connects output 12 More regulator 9

heat consumption with input 6 0 open actuator 5 of organ 4. At the same time

The regulator 9 of the consumed heat, receiving signals from the sensor 16 or 22 and the setting device 17, operates in the mode of stabilization of the thermal parameter, affecting the actuator 5

authority 4.

As the pre-selection compartment increases in power to the value N, the output 15 signal More regulator 11 of the available heat load disappears, relay element 14 comes to its initial state, the contact 13 opens, which turns off output 12 Pain Regulator 9 of the available thermal load from the input 6 Open

45 ° Regulator 9 available heat load from inlet 6 Open gQ

 A smaller regulator 11 of available heat load appears

drive 5 of organ 4. This eliminates the possibility of increasing the power of the pre-selection compartment as a result of an increase in the amount of heat consumed (if this increase is necessary), i.e. the system enters the mode of limiting the heat load of the turbine. With an increase in thermal load of 55 turbine loads above the permissible value (with the power of the pre-selection compartment 7 N) at output 10

which enters input 7 Close the actuator 5 of the organ 4, causing organ A to move in the direction of closing until the power of the pre-selection compartment decreases to the value Nj. Due to the necessary cover of the regulator 4, at the command of the regulator 11, the parameter set by the thermal consumer deviates from the given value in the direction of decreasing. Output 8 Less regulator 9 has no signal, and output 12 More of this controller has a signal, but with contact 13 output 12 is disconnected from actuator 5 of organ 4.

With the elimination of the cause that caused the unacceptable increase in the heat load of the turbine, and the resulting reduction in the power of the pre-selection compartment to a value less than N, by. output 15 More regulator 11 of available thermal load voltage controller 25 of available thermal signal that triggers relay two-position element 14 and closes contact 13, resulting in a signal from output 12 More regulator 9 of heat consumed is fed to input 6 Open the actuator 5 of the regulatory authority 4, while (the value of the parameter specified by

F o r-, m in l

thermal consumer, increases and at the same time decreases the power margin of the pre-selection compartment. This process continues until the value of the thermal parameter becomes equal to the set value or the power of the bore compartment takes the value NOTC N,.

Thus, the transition to the stabilization mode of the parameter specified by the heat consumer is unstressed.

the invention

F o r-, m in l

The turbine heat load control system contains an extra-turbine regulator with a drive, a regulator of consumed heat with outputs More and Less, the first of which is connected to the drive of the regulator through a controlled contact, and the second - directly, and

loads with outlets More and Less, the last of which is connected to the drive of the regulator, characterized in that, in order to increase the reliability of the turbine, the output More regulator of the available thermal load is connected to the input of the controlled contact.

Editor A. Kozoriz Order D616 / 31

Compiled by A. Kalashnikov

Tehred L. Serdyukova Corrector M. Pojo

Circulation 481 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

22

20 Y Se / ne a - to tel / southeast of r 5 / 77e / / o

Claims (1)

Claim A turbine thermal load control system containing an off-turbine regulating body with a drive, a heat consumption regulator with outputs More and Less, the first of which is connected to the regulator body drive via a controlled contact, and the second directly, and a disposable heat load regulator with outputs More and Less ^ the last of which is connected to the drive of the regulatory body, characterized in that, in order to increase the reliability of the turbine, the output is More connected to the controller of the available heat load input of a controlled contact. Fi g. 2