JP2019049234A - Extraction control method of steam turbine generator, and controller thereof - Google Patents

Abstract

To propose an extraction control method of a steam turbine generator capable of properly coping with even fluctuation of an extracted steam amount due to scale adhesion to the turbine or reduction of degree of vacuum in a condenser.SOLUTION: A steam turbine generator comprises a steam flow rate meter at an extraction outlet of a steam turbine, and an automatic-control-system atmosphere release valve at an extraction line. The steam turbine generator can input generator output and an extracted steam amount as parameters to change each approximate peak and inclination, without directly programming an approximate expression obtained from the relationship between the generator output and the extracted steam amount.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an extraction control method for a steam turbine generator that extracts steam from an intermediate stage of a turbine and sends it to a factory. More specifically, the extraction steam amount necessary for maintaining the generator output derived from the characteristics of the turbine. In the system that automatically controls the atmospheric discharge valve, not only can it respond appropriately to fluctuations in the generator load and extraction steam, but it is also appropriate for fluctuations in the extraction steam due to scale adhesion to the turbine and a decrease in the vacuum level of the condenser. It is related with the extraction control method and control apparatus of a steam turbine generator in order to cope with this.

  As a steam turbine generator that extracts steam from the intermediate stage of the turbine and sends it to the factory, a pressure control valve is provided inside the turbine casing, and pressure control is performed upstream from the pressure control valve to keep the extraction pressure constant. There is known an internal extraction pressure control type turbine generator capable of supplying a stable pressure from a low load of a turbine to a rating by maintaining the pressure. This internal extraction pressure control type turbine generator is an extraction turbine that converts thermal energy of steam introduced from a boiler (not shown) for generating superheated steam into drive energy as shown in FIG. Type steam turbine 21, steam control valve 22 for adjusting the flow rate of steam introduced from the steam inlet 22-1, extraction valve 23, extraction pressure gauge 24, tachometer 25, governor 26, condenser 27 The air release valve 28 is configured. The steam turbine 21 has a high-pressure stage 21-1 and a low-pressure stage 21-2, and the steam that has flowed into the high-pressure stage 21-1 of the steam turbine 21 is extracted before the extraction valve 23, and is reduced by the extraction valve 23. The inflow of steam entering the stage 21-2 is controlled, and the steam is supplied from the extraction line 29 to the factory.

  In order to control the extraction turbine type steam turbine 21 in this internal extraction pressure control type turbine generator, the rotational speed measured by the tachometer 25 and the extraction pressure measured by the extraction pressure gauge 24 are required. If the load on the turbine 21 and the required amount of extraction change, the limits of the steam control valve 22 and the extraction reduction valve 23 need to be controlled. For this reason, the internal bleed pressure control type turbine generator has a mechanism for automatically controlling both the steam control valve 22 and the bleed air reduction valve 23 in order to maintain the rotation speed of the steam turbine 21, the generator output and the bleed air. It has.

  As the atmospheric release valve 28, a manual valve or an automatic control type control valve is used. When a manual valve is used for the air release valve 28, the valve opening is adjusted in advance with a margin based on the generator load and the inlet steam flow. On the other hand, as a method of using a control valve of the automatic control method, a control valve for releasing air is installed in the extraction line, and when the extraction pressure exceeds the set pressure, the opening of the control valve is adjusted by the extraction pressure Methods for automatic control are disclosed in Patent Document 1 and Patent Document 2. In the method disclosed in Patent Document 1, in the steam turbine control device constituted by the speed or load control device and the bleed control device, when the bleed pressure regulating valve is fully opened or at the minimum opening, or the control valve is In the case of full opening, the speed or load is excluded from the control and the extraction control is performed with priority. The method disclosed in Patent Document 2 includes a turbine bypass circuit that discharges surplus steam to the condenser side in the extraction steam path, and a load that controls boiler steam that is introduced into the steam turbine in response to the generator load. In a boiler turbine generator provided with a control device, a bypass device that always discharges surplus steam from an extraction steam path to a condenser by a turbine bypass circuit that discharges the steam to a condenser side, and controls a bypass amount of the bypass circuit This is a method in which the control of the bypass steam amount corresponding to the load fluctuation is given priority over the load control device by taking the input signal from the extraction steam path.

However, the above-described conventional steam turbine generator extraction control technology has the following problems.
In a steam turbine generator that extracts steam from the middle stage of the turbine and sends it to the factory, a manual valve is used as the air release valve that is provided to cope with fluctuations in the factory load of the generator load and extracted steam. In order to adjust the opening with sufficient margin in advance using the generator load and the inlet steam flow as a guide, excessive steam release to the atmosphere occurs, and because of the manual valve, the generator load There was a risk that it would not be possible to cope with unexpected and sudden fluctuations in the amount of extracted steam used in the factory.
On the other hand, in the method in which the atmospheric discharge valve is replaced with an automatic control type control valve disclosed in Patent Documents 1 and 2, and the control valve is controlled by the extraction pressure, the extraction pressure fluctuates by opening and closing the atmospheric release valve. Therefore, there is a problem that the control of the steam control valve and the extraction valve that are controlled by the extraction pressure is affected, and these controls cannot be performed stably.

In order to solve this problem of the prior art, excessively extracted steam released to the atmosphere has been conventionally controlled automatically by independently controlling the atmosphere release valve based on an appropriate amount of extracted steam corresponding to the generator load. There is a steam turbine generator extraction control method that can reduce and maintain a stable generator output against unexpected and sudden fluctuations in generator load and extraction steam factory usage.
The extraction control method for the steam turbine generator is configured to extract steam from the intermediate stage of the steam turbine and send it to the factory, and a steam flow meter at the extraction outlet of the steam turbine and an automatic control system to the extraction line In a steam turbine generator equipped with an atmospheric discharge valve, the extraction steam amount set value corresponding to the generator load is calculated based on the characteristics of the inlet steam flow rate and extraction steam amount with respect to the generator output of the steam turbine generator. The excess steam is independently controlled by the atmospheric discharge valve based on the set value, and in the extraction control method of the steam turbine generator, the generator output and extraction shown in FIG. From the relationship of the steam amount setting value, it is necessary to increase the amount of extracted steam in accordance with the region where extraction is not required (A region), the region where existing extraction control is not stable (B region), and the turbine output. Set the area (C area), set the extraction steam amount to 0 T / Hr in the area where extraction is not required (A area), and keep the exhaust amount constant in the area (B area) where the existing extraction control is not stable. In the region (C region) where it is necessary to increase the amount of extracted steam according to the turbine output, this is a method of setting the amount of extracted steam to be proportional to the generator load.

  FIG. 7 illustrates the relationship between the generator output, the inlet steam flow rate, and the extraction steam amount in the above-described internal extraction pressure control type turbine generator. In the “A region”, if the inlet steam flow rate is increased, the extraction steam amount is 0T. This is an area where the generator output can be output even at / Hr. However, if the inlet steam flow rate is increased beyond the capacity of the condenser, extraction is required. When the generator output exceeds the A region, it exceeds the capacity of the condenser, so that the necessary generator output cannot be output unless the air is extracted. For this reason, when moving from the A region to the B region, it is necessary to perform the extraction rapidly, and the extraction steam amount line becomes discontinuous.

In other words, when the factory is completely shut down and heating or heat insulation with steam is not required, operation is performed in the A region where extraction is not required, and the extraction steam is used as steam for heating or heat insulation during factory operation. Therefore, it operates in B area or more. If the power load of the factory is high, operate in the C region. When the amount of steam used in the factory is less than the amount of extracted steam, the surplus is released to the atmosphere. When the generator output is operated beyond the A region, an inlet steam flow rate of a certain amount or more is required to maintain the generator output.
Here, “B region” is a region where the inlet steam flow rate increases in accordance with the generator output, but the extraction steam amount is a region where a constant amount is supplied, and the existing extraction control is not stable. Further, “C region” is a region where the inlet steam flow rate increases and the amount of extracted steam increases in accordance with the generator output, and also in the region where the amount of extracted steam needs to be increased in accordance with the generator output. is there. The difference between the dotted line and the solid line in the figure indicates the amount of extracted steam.

  In consideration of increasing the generator output, in the A region, even if the inlet steam flow rate is increased, power can be generated with the extraction steam amount of 0 T / Hr. In order to increase the output beyond the B and C regions, the capacity of the condenser is exceeded, so it is necessary to increase the amount of extracted steam. The left end of the A region indicates the minimum capacity of the generator, and the right end of the C region indicates the maximum capacity of the generator.

  For this reason, an atmospheric discharge valve is provided for releasing excess steam to the atmosphere when the amount of extracted steam necessary for maintaining the generator output exceeds the amount used in the factory. In the B region and the C region, the atmospheric discharge valve is opened and closed when the output of the generator is fluctuated due to fluctuations in the power consumption of the factory and when the factory supply / bleeding steam quantity is fluctuated due to fluctuations in the factory usage. Thus, the amount of extracted steam necessary to maintain the generator output is maintained.

  According to this steam turbine generator extraction control method, it is possible to independently and automatically control the automatic control type atmospheric discharge valve installed in the extraction line based on the appropriate amount of extraction steam corresponding to the generator load. As a result, excess bleed steam released to the atmosphere can be reduced, and stable generator output can be maintained against unexpected sudden fluctuations in the generator load and the amount of bleed steam used in the factory. The steam flow meter installed in the line and the automatic control type atmospheric release valve can be installed easily without any changes to the existing turbine generator control device, so that the equipment cost is not high. Play.

However, this steam turbine generator extraction control method has the following problems.
In other words, in a turbine generator that extracts steam from the middle stage of the steam turbine and sends it to the factory, the amount of extracted steam relative to the generator output is determined by the characteristics of the turbine, so the approximation obtained from the relationship between the generator output and the amount of extracted steam The atmospheric discharge valve can be automatically controlled using the equation, but the steam supplied to the turbine contains impurities and gases such as silica and chloride ions. If the capacity of the condenser is reduced due to a decrease in the degree of vacuum, and the escape to the exhaust side becomes worse, an increase in the amount of extracted steam is required to maintain the generator output of the turbine. In such a situation, when the atmospheric discharge valve is automatically controlled by the above approximate expression and the operation is continued, the set value of the extraction steam amount obtained from the calculation result is less than the actual extraction steam amount, and the amount of atmospheric release is insufficient. However, there is a possibility that the extraction steam pressure will rise and the amount of extraction steam will be insufficient to maintain the generator output. In order to prevent this, it is necessary to review the programmed arithmetic expression, stop the automatic control of the atmospheric release valve, and rewrite it. Further, in a factory having a plurality of turbines, it is necessary to derive an approximate expression in accordance with the characteristics of each turbine and to program different arithmetic expressions for each turbine.

JP 07-166808 A Japanese Patent Laid-Open No. 11-343814

  The present invention has been made to solve the above-described problems of the prior art, and does not directly program the approximate expression obtained from the relationship between the generator output and the amount of extracted steam, but uses the generator output and the amount of extracted steam as parameters. By making it possible to change the starting point and inclination of the approximate polygonal line, the steam turbine generator that can appropriately cope with fluctuations in the amount of extracted steam due to scale adhesion to the turbine or a decrease in the vacuum level of the condenser, etc. An extraction control method and a control device therefor are proposed.

A steam turbine generator bleed control method according to the present invention is configured to extract steam from an intermediate stage of a steam turbine and send it to a factory, and to a steam flow meter and a bleed line at a bleed outlet of the steam turbine. This is an extraction control method for a steam turbine generator that includes an automatic control type atmospheric discharge valve and has a calculation / control device for controlling the atmospheric discharge valve by obtaining a set value of the extraction steam amount according to the generator output. Then, when the atmospheric discharge valve is automatically controlled with the amount of extracted steam derived from the characteristics of the steam turbine, the relationship between the generator output and the amount of extracted steam is set as a parameter for each vertex and inclination of a broken line, Based on the characteristics of the parameter, the set value of the extraction steam amount corresponding to the generator output is calculated and obtained, and the surplus steam is made independent by the atmospheric release valve based on this set value and the set factory steam consumption. It is characterized in that the control.
This extraction control method of the present invention is a preferred embodiment in which a plurality of points are set with a combination of a generator output and extraction steam amount serving as the vertices of the broken line that can be changed according to the characteristics of the steam turbine as parameters. .
Further, the extraction control device for a steam turbine generator according to the present invention includes an extraction line for extracting steam from an extraction outlet provided at an intermediate stage of the steam turbine and sending it to a factory, and a steam flow rate installed in the extraction line. A device that includes a meter, and an air release valve with a controller of an automatic control system that is provided by branching from the extraction line on the factory side from the steam flow meter of the extraction line and that discharges the extracted steam to the atmosphere; The generator output sent from the turbine generator, the input unit for inputting the steam usage of the factory sent from the factory, and the “generator output that becomes the apex of the polygonal line that can be changed in accordance with the characteristics of the steam turbine obtained in advance. And the database area that stores the “vertex coordinates based on the combination of extraction steam volume” and “inclination between adjacent vertices” as parameters, and the parameters are determined according to the generator output. Generate a command signal for controlling the atmospheric discharge valve based on the set value of the extraction steam amount and the amount of steam used in the factory, output the command signal, and the command signal output from the calculation unit An operation / control device including an output unit for outputting to the controller of the atmospheric discharge valve, a generator output, a factory steam consumption, a set value, and an operation data area for storing command signals in synchronization A bleed control device for a steam turbine generator.

  According to the steam turbine generator extraction control method and control apparatus of the present invention, the approximate expression obtained from the relationship between the generator output and the extraction steam amount is not directly programmed, and the generator output and the extraction steam amount are input as parameters. However, by making it possible to change the approximate apex and inclination, in the case of an increase in the amount of extracted steam due to a decrease in condenser capacity due to scale adhesion to the turbine or a reduction in the vacuum degree of the condenser, etc. Also, review the programmed calculation formula, change the control characteristics of the air release valve without stopping and rewriting the automatic control of the air release valve, increase the extraction steam pressure due to the lack of air release, or the insufficient amount of extraction steam And stable generator output can be maintained.

  Even in factories that have multiple steam turbines, an approximate expression can be derived according to the characteristics of each turbine, and the same calculation expression can be used to change parameters without programming different calculation expressions for each turbine. Can respond.

It is the schematic which shows the system structural example for enforcing the extraction control method of the steam turbine generator of this invention. 2 is a flowchart showing a bleed control method for the steam turbine generator of the present invention in the system configuration example shown in FIG. 1. It is explanatory drawing which shows the example of a setting of the amount of extraction steam with respect to the generator output of this invention in the system configuration example similarly shown in FIG. It is the schematic which shows the structural example of the extraction control apparatus of the steam turbine generator of this invention. It is the schematic which shows the system structural example of the conventional internal extraction pressure control type turbine generator. It is explanatory drawing which shows the example of a setting of the conventional generator output and the amount of extraction steam. It is a figure which shows the relationship between the conventional generator output, an inlet steam flow rate, and the amount of extracted steam.

  The system configuration for carrying out the steam turbine generator extraction control method of the present invention shown in FIG. 1 is an extraction that converts the thermal energy of steam introduced from a boiler (not shown) for generating superheated steam into drive energy. Turbine-type steam turbine 1, steam control valve 2 for adjusting the flow rate of steam introduced from the steam inlet 2-1, extraction valve 3, extraction pressure gauge 4, tachometer 5, governor 6, condenser 7, an extraction line 8, a steam flow meter 9 installed at an extraction outlet of the steam turbine 1, an arithmetic / control device 10, and an atmospheric discharge valve (control valve) 12 with a controller of an automatic control system. Also in the system configuration of the present invention, the steam turbine 1 has a high-pressure stage 1-1 and a low-pressure stage 1-2, and the steam that has flowed into the high-pressure stage 1-1 flows before the extraction valve 3, that is, in the middle of the turbine 1. The steam is extracted at the stage, the inflow of steam entering the low pressure stage 1-2 is controlled by the extraction valve 3, and the steam is supplied to the factory from the extraction line 8 provided in the intermediate stage of the turbine 1. However, in this system configuration example, the configuration other than the steam flow meter 9, the calculation / control device 10, and the automatic control type atmospheric release valve 12 with a controller is the same as that of the prior art shown in FIG. In addition, the steam flow meter 9 and the atmospheric release valve 12 with a controller in the system configuration of the present invention are those capable of flowing sufficient steam. Further, the measurement of the steam flow rate at the turbine bleed outlet can use the difference between the steam flow rate at the turbine inlet and the water flow rate at the outlet of the condenser 7 that has processed the turbine exhaust.

  The system configuration example of this steam turbine generator includes an air release valve by setting the extraction steam amount in response to an instruction from the steam flow meter 9 for measuring the extraction steam amount installed at the extraction outlet of the steam turbine 1. 12 is a system for adjusting the opening degree. When the extracted steam is sent to the factory, the sum of the set factory use amount of the extracted steam and the amount released to the atmosphere is the amount of extracted steam. Therefore, the opening degree of the atmospheric release valve 12 is closed when the set factory use amount of the extraction steam exceeds the extraction steam amount. In addition, when the set factory use amount is less than the extraction steam amount, the opening of the atmosphere release valve 12 is opened and the surplus steam is released into the atmosphere so that the amount of extraction steam is automatically controlled. .

In this steam turbine generator system configuration example, a steam generator is used to extract steam from the intermediate stage of the steam turbine 1 and send it to the factory. The atmospheric discharge valve 12 is automatically set based on the amount of extracted steam derived from the characteristics of the steam turbine 1. In the case of control, when the amount of extracted steam increases due to scale adhesion to the steam turbine 1 or a decrease in the vacuum degree of the condenser 7, it is necessary to change the control characteristics of the atmospheric discharge valve 12. The present invention takes the measures described below in order to cope with these variations.
That is, the approximate expression obtained from the relationship between the generator output and the amount of extracted steam is not directly programmed, but the generator output and the amount of extracted steam are input as parameters, and each vertex and inclination of the approximate broken line are changed. Specifically, as shown in FIG. 3, for example, 10 points from P1 to P10 are set with the combination of the generator output and the amount of extracted steam at each vertex of the polygonal line in accordance with the characteristics of the steam turbine 1 as parameters. The actual generator output and the generator output set from P1 to P10 are sequentially compared until the corresponding section is found, and when the corresponding section is found, the value that is the intersection of the line segment connecting the two points is extracted. And the result is output as a set value for the extraction steam amount control for controlling the atmospheric discharge valve 12. For example, when the actual generator output is between P7 and P8, the value A that is the intersection of the line segment starting from P7 and ending at P8 is output as the extraction steam amount to the setting value of the extraction steam amount control, Excess steam can be independently controlled by the atmospheric discharge valve 12 based on the set value and the set factory steam consumption.

  The extraction method for the steam turbine generator will be described with reference to the flowchart shown in FIG. 2. First, parameters are set from the relationship between the generator output and the amount of extracted steam. Next, based on the parameter characteristics, a set value of the extraction steam amount corresponding to the generator output is obtained, and the set extraction steam amount and the set factory steam use amount are compared. As a result, when the set extraction steam amount is larger than the set factory steam use amount, the opening degree of the atmospheric discharge valve 12 is opened, and conversely, when the set extraction steam amount is smaller than the set factory steam use amount, Close the opening. By performing such calculation and comparison continuously, it is possible to correct the control characteristics of the atmospheric release valve such as the starting point and inclination of the broken line without stopping the control of the atmospheric release valve even when the parameter is changed. .

FIG. 4 is a schematic diagram showing an example of a steam turbine generator bleed control device for executing the steam turbine generator bleed control method according to the present invention described above.
In FIG. 4, 100 is an extraction control device (range surrounded by a one-dot chain line), 1 A is an extraction outlet, 10 is a calculation / control device of the extraction control device, 12 a is a controller of the atmospheric release valve 12, 101 is an input unit, 102 output unit, 103 is an arithmetic unit, 104 is a database area, 105 is an operation data area, EQ is an equipment unit of a bleed control device, S is a command signal, P is a generator output, U is a steam consumption of a factory, T is It is a set value of the amount of extracted steam.

  The extraction control device 100 according to the present invention is installed in an extraction line (steam supply piping) 8 for extracting steam from an extraction outlet 1A provided in an intermediate stage of the steam turbine and supplying it to a factory, and the extraction line 8 The steam flow meter 9 and the steam flow meter 9 installed in the bleed line 8 are branched from the bleed line 8 on the factory side, and are released into the atmosphere with an automatic control system controller that discharges the extracted steam to the atmosphere. It has an equipment unit (EQ) composed of a valve 12 and operates the atmospheric release valve 12 with a controller in response to a command signal S from the arithmetic / control device (10), thereby maintaining a stable generator output. To do.

  The arithmetic / control device 10 according to the present invention includes a generator output sent from a steam turbine generator, an input unit 101 for inputting a steam usage amount of the factory sent from the factory, and a previously obtained characteristic of the steam turbine. A database area 104 storing “vertex coordinates based on the combination of generator output and amount of extracted steam” and “inclination between adjacent vertices” as parameters at each vertex of the changeable broken line, and the parameters are obtained according to the generator output. A command signal S for controlling the opening / closing operation of the atmospheric release valve 12 is generated by comparing the extracted steam amount set value T and the input steam consumption amount U of the factory, and the command The arithmetic unit 103 that outputs the signal S, and the output that outputs the command signal S output from the arithmetic unit 103 to the controller 12a of the atmospheric discharge valve 12 And 102, and the generator output P, a steam usage U factory, the set value T of the extracted steam amount, the command signal S, has composition including the operational data area 105 for storing in synchronism.

  In the extraction control device 100 according to the present invention, in the calculation / control device 10 based on the generator output P measured and inputted in accordance with the extraction control method for the steam turbine generator according to the present invention shown in the flowchart of FIG. From the parameters stored in the database area 104, a set value T of the extracted steam amount is calculated, and the set value T is compared with the factory steam use amount U synchronized with the generator output P, so that the atmospheric discharge A command signal S for opening / closing command of the valve 12 is transmitted to the controller 12a, and the atmospheric release valve 12 is operated by the opening / closing command.

  As described above, the steam turbine generator extraction control method and control apparatus according to the present invention do not directly program the approximate expression obtained from the relationship between the generator output and the amount of extraction steam, but the generator output and extraction steam. Appropriately cope with fluctuations in the amount of extracted steam due to scale adhesion to the turbine and lowering of the vacuum level of the condenser, etc. by inputting the amount as a parameter so that the origin and inclination of the approximate broken line can be changed Can do.

DESCRIPTION OF SYMBOLS 1 Steam turbine 1A Extraction outlet 1-1 High pressure stage 1-2 Low pressure stage 2 Steam control valve 2-1 Steam inlet 3 Extraction valve 4 Extraction pressure gauge 5 Tachometer 6 Speed governor 7 Condenser 8 Extraction line 9 Steam Flow meter 10 Arithmetic / control device 12 Atmospheric release valve 12a Atmospheric release valve controller 100 Extraction control device 101 Input unit 102 Output unit 103 Operation unit 104 Database region 105 Operation data region EQ Equipment unit of extraction control device S Command signal P Power generation Unit output U Factory steam consumption T Set value of extraction steam quantity

Claims (3)

Steam is extracted from the middle stage of the steam turbine and sent to the factory, and a steam flow meter is installed at the extraction outlet of the steam turbine, and an automatic discharge air release valve is installed in the extraction line, and the generator output A steam turbine generator bleed control method having a calculation control device for obtaining a set value of a corresponding bleed steam amount and controlling the atmospheric discharge valve,
When automatically controlling the atmospheric discharge valve with the amount of extracted steam derived from the characteristics of the steam turbine, the relationship between the generator output and the amount of extracted steam is set as a parameter for each vertex and slope of a broken line that can be changed. Calculate the set value of the extraction steam amount according to the generator output based on the characteristics, and control the surplus steam independently by the atmospheric release valve based on this set value and the set factory steam consumption An extraction control method for a steam turbine generator.   2. The extraction control of a steam turbine generator according to claim 1, wherein a combination of a generator output and an extraction steam amount at each vertex of the broken line that can be changed according to the characteristics of the steam turbine is set as a parameter at a plurality of points. Method. An extraction line (steam supply piping) for extracting steam from the extraction outlet provided in the intermediate stage of the steam turbine and supplying it to the factory;
A steam flow meter installed in the extraction line;
An apparatus unit provided with an air release valve with a controller of an automatic control system that is provided by branching from the extraction line on the factory side from the steam flow meter of the extraction line, and that discharges the extracted steam to the atmosphere;
A generator output sent from the generator of the steam turbine, and an input unit for inputting the amount of steam used in the factory sent to the factory;
A database area that stores, as parameters, “vertex coordinates by a combination of generator output and extracted steam amount” and “inclinations between adjacent vertices”, which are the vertices of a broken line that can be changed according to the characteristics of the steam turbine obtained in advance
Generate a command value for controlling the atmospheric discharge valve based on the set value of the extracted steam amount determined from the parameter according to the generator output and the steam usage amount of the factory, and output the command signal An arithmetic unit;
An output unit that outputs a command signal output from the arithmetic unit to the controller of the atmospheric release valve;
A steam turbine generator comprising a calculation / control device including the generator output, the steam usage of the factory, the set value, and an operation data area for storing the command signal in synchronization. Bleed control device.

Images