JPH07145704A - Turbine controller - Google Patents

Abstract

PURPOSE:To eliminate such defectiveness as frequent use of only one valve by setting combination of a plurality of patterns representing correspondence of flow rate distribution pattern generators for opening a first valve through a final valve in sequence to a plurality of valves in a controller for sequentially opening or closing a plurality of governors. CONSTITUTION:A bypass flow rate distribution control member 21 for inputting a bypass valve flow rate demand signal (x) on the basis of a shortage of a governor flow rate with respect to a pressure flow rate demand command is provided with flow rate distribution pattern generators 25 (25A-25C) for outputting valve command signals Z1-Z3 according to the bypass valve flow rate demand signal (x); and a setter 26 for combining correspondence of valve flow rate demand signals y1-y3 and valve command signals z1-z3 of the flow rate distribution pattern generators 25 so as to output either of selection signals of patterns (a)-(c). A signal switch 27 changes over switches of the patterns (a)-(c) according to the selection signal of the patterns (a)-(c). Consequently, it is possible to eliminate such defectiveness as frequent use of only one valve so as to prolong a lifetime of turbine system equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine control device for sequentially opening and closing a plurality of regulator valves or bypass valves in a turbine of a power plant.

[0002]

2. Description of the Related Art An example of a turbine control device in a nuclear power plant is shown in FIG.

The steam generated in the nuclear reactor 1 passes through the main steam stop valve 2 and the flow rate is controlled by the steam control valve 3 to control the turbine 4
Flow into. The steam flowing into the turbine 4 is the turbine 4
Is rotated, and the generator 5 is driven to generate electric power. In addition, the excess steam at the time of startup or at the time of an accident is divided in flow control by a plurality of bypass valves 6A, 6B, 6C,
After flowing into the temperature reduction / pressure reduction device 7 and reduced in temperature and pressure, the condenser 8 condenses and condenses it with the steam that has worked in the turbine.

The actual speed signal of the turbine 4 is the speed detector 9
Is detected by the comparator 11 and is compared with the speed setting signal from the speed / load setting device 10 in the comparator 11. The deviation signal between the speed setting signal and the actual speed signal is converted into a speed flow rate request signal by the speed control unit 12 and sent to the low value selector 13.

On the other hand, the turbine inlet pressure signal is detected by the pressure detector 14 and is detected by the comparator 16 in the pressure setter 1.
It is compared with the pressure setting signal from 5. The deviation signal between the pressure setting signal and the turbine inlet pressure signal is used as the pressure control unit 17
Is converted into a pressure flow rate request signal and sent to the low value selector 13 similarly to the speed flow rate request signal.

The low value selector 13 selects one of the two flow rate request signals, whichever has the lower value, as the regulating valve flow rate request signal.
This is sent to the control valve controller 18.

In the regulator valve control unit 18, a comparator 18a computes a deviation signal between the flow rate request signal and the regulator valve actual opening signal from the regulator valve opening detector 19, and further the amplifier 1
Output to the steam control valve 3 via 8b. As a result, the control valve control unit 18 controls the steam control valve 3 so that the valve opening degree corresponds to the flow rate request signal.

Further, the pressure flow rate request signal and the regulating valve flow rate request signal are compared and calculated in the comparator 20, and the shortage of the regulating valve flow rate is sent to the bypass flow rate distribution control section 21 as a bypass valve flow rate request signal. Bypass flow rate distribution control unit 21
Calculates a flow rate request signal for each valve based on the bypass valve flow rate request signal, and calculates the flow rate request signal for each bypass valve 22A, 22A.
Send to B, 22C. Each bypass valve control unit 22A, 22
In B and 22C, each deviation signal between the flow rate request signal of each valve and the bypass valve actual opening signal from each bypass valve opening detector 23A, 23B, 23C is calculated by each comparator 32, and each deviation signal is further calculated. Each bypass valve 6 via a valve amplifier 33
Output to A, 6B, 6C. As a result, the bypass valve control units 22A, 22B, 22C control the bypass valves 6A, 6B, 6C according to the valve flow rate request command signals.

In this way, in the turbine 4, the steam control valve 3 and the bypass valves 6A, 6B and 6C are controlled at a predetermined speed and a predetermined inlet steam pressure with a predetermined flow rate sharing.

During normal plant operation, it is desirable that the bypass valves 6A, 6B, 6C be closed from the viewpoint of energy saving, and a constant closed bypass signal from the bypass setter 24 is added to the comparator 20. Then, the bypass valves 6A, 6B and 6C are closed.

Further, FIG. 7 shows the details of the bypass flow rate distribution control unit 21, which are 25A, 25B and 25C.
Is a flow rate distribution for outputting the valve command signals Z1, Z2, Z3 in accordance with the bypass valve flow rate request signal x from the comparator 20 in the same manner as the patterns shown in (a), (b) and (c) of FIG. It is a pattern generator.

As can be seen from FIGS. 7 and 2, the bypass valves 6A, 6B and 6C are controlled in a fixed sequence by first opening the first valve bypass valve 6A and then fully opening the bypass valve 6B. After that, opening / closing control is performed in which the bypass valve 6C as the final valve starts to open.

On the other hand, also in the case of controlling the opening and closing of a plurality of steam control valves provided in the turbine main steam system, one method is a certain sequence in order to minimize the loss of thermal energy due to the pressure drop when passing through the valves. A method of sequentially opening and closing the steam control valve from the first valve is also adopted.

[0014]

However, if a plurality of valves are always controlled to be opened and closed in the same order as described above, in the case of a steam control valve, only the same valve is frequently used during partial injection, and the steam piping system is often used. There is a problem in that local thermal fatigue occurs, and in the case of the bypass valve, there is a problem in that local thermal fatigue is further increased with respect to the temperature reducing / reducing device 7.

In order to solve such a problem, a "turbine control device" is proposed in Japanese Patent Publication No. 3-68205, but the above-mentioned proposal is a control for automatically and sequentially opening and closing a plurality of valves. This method is suitable for normal plant operation, but is not suitable when it is desired to change the opening / closing sequence arbitrarily as needed.

For example, when the function cannot be satisfied due to a failure of any one of the plurality of bypass systems,
The first in the order of opening and closing the bypass valve of the system that cannot satisfy the function
Use as a control valve is not preferable for plant operation.

In this case, if the valve is to be used as a final control valve in the opening / closing sequence of a plurality of valves, it is necessary to operate it in an arbitrary opening / closing sequence in order to minimize its influence.
Also, during the trial operation period of the plant, it is desirable to be able to change the valve opening / closing sequence by controlling with an arbitrary valve from the viewpoint of test operation and optionally using a bypass system from the bypass valve to the condenser.

Further, when a plurality of valves are always controlled to be opened and closed in the same order, and when a failure occurs in the bypass system of the first control valve, the function of the system cannot be satisfied, and especially in plant operation, In a nuclear power plant, there is a problem that pressure control is not preferable.

Therefore, the present invention provides a turbine control device that appropriately changes the opening and closing order of a plurality of valves as necessary and changes the valve in which an abnormality has occurred to the valve that finally opens and closes. To aim.

[0020]

According to a first aspect of the present invention, a plurality of valves sequentially open from the first valve to the final valve in accordance with the total flow rate request, and the total flow rate request is made by the plurality of valves. In a turbine control device for controlling a steam flow rate by distributing a flow rate, a flow rate distribution pattern generation for generating a flow rate distribution pattern which is provided corresponding to each of the first valve to the final valve and presets characteristics of a flow rate request and a valve command And a plurality of combinations for setting the opening order of the plurality of valves corresponding to the first valve to the final valve, and a selection signal for selecting one of the plurality of combinations. A setting device that outputs and a switching device that switches so as to output the valve command set in the flow distribution pattern of each of the flow distribution pattern generators to the corresponding valve based on the selection signal are provided. is there.

According to a second aspect of the present invention, a plurality of valves are sequentially opened from the first valve to the final valve in accordance with the total flow rate request, and the total flow rate request is distributed by the plurality of valves to obtain a steam flow rate. In a turbine control device for controlling a plurality of valves, a plurality of flow rate distribution patterns that are respectively provided corresponding to the plurality of valves and in which the characteristics of the flow rate request and the valve command are preset are defined. A flow rate distribution pattern generator that generates a pattern and outputs it to the corresponding valve, and a plurality of combinations that sets the opening order of the plurality of valves corresponding to the first valve to the final valve are preset, and the plurality of combinations are set in advance. And a setting device for outputting the selection signal to the flow rate distribution pattern generator in order to select one of the combinations.

According to a third aspect of the present invention, a plurality of valves are sequentially opened from the first valve to the last valve in accordance with the total flow rate request, and the total flow rate request is distributed by the plurality of valves to obtain a steam flow rate. In a turbine control device for controlling a valve, a flow rate distribution pattern generator that is provided corresponding to each of the first valve to the final valve and that generates a flow rate distribution pattern in which the characteristics of the flow rate request and the valve command are preset, and An abnormality detector that outputs a valve abnormality signal based on a deviation signal between a valve command and an actual opening, and a plurality of combinations that set the opening order of the plurality of valves in correspondence with the first valve to the last valve. A preset signal is output to select one of the plurality of combinations, and the valve is replaced with the select signal when the valve abnormality signal is generated in any of the plurality of valves. The valve that generated the abnormal signal is the final valve As described above, a setter that outputs another selection signal, and a valve command set in the flow rate distribution pattern of each of the flow rate distribution pattern generators based on the selection signal output by the setter are output to the corresponding valves. And a switching device for switching to.

According to a fourth aspect of the present invention, a plurality of valves are sequentially opened from the first valve to the final valve in accordance with the total flow rate request, and the total flow rate request is distributed by the plurality of valves to obtain a steam flow rate. In a turbine control device for controlling a plurality of valves, a plurality of flow rate distribution patterns that are respectively provided corresponding to the plurality of valves and in which the characteristics of the flow rate request and the valve command are preset are defined. A flow rate distribution pattern generator that generates a pattern and outputs it to the corresponding valve, an abnormality detector that outputs a valve abnormality signal based on a deviation signal between the valve command and the actual opening of each valve, and the first valve A plurality of combinations for setting the opening order of the plurality of valves corresponding to the final valve are preset, and the selection signal is sent to the flow rate distribution pattern generator to select one of the plurality of combinations. While outputting, the plurality of valves A setting device that outputs another selection signal to the flow rate distribution pattern generator so that the valve that has generated the valve abnormality signal becomes the final valve in place of the selection signal when the valve abnormality signal occurs Is provided.

[0024]

According to the invention of claim 1, a plurality of corresponding flow rate distribution pattern generators and a plurality of corresponding combinations of patterns of the plurality of valves are preset so as to sequentially open the first valve to the final valve by the setting device. , And outputs a selection signal for selecting one of a plurality of pattern combinations. The switcher switches to output the flow distribution pattern of each flow distribution pattern generator to each corresponding valve based on the selection signal. Therefore, only the same valve is not frequently used, and local thermal fatigue can be dispersed and diminished by the planned pattern setting, and the life of the turbine system equipment can be extended.

According to a second aspect of the present invention, a flow rate distribution pattern generator is provided corresponding to a plurality of valves, a plurality of flow rate distribution patterns are defined, and a flow rate distribution pattern corresponding to the selection signal is generated within the plurality of flow rate distribution patterns. The setter selects and outputs a flow rate distribution pattern to a corresponding valve from a plurality of flow rate distribution patterns defined in the flow rate distribution pattern generator for sequentially opening the first valve to the final valve. Therefore, only the same valve is not frequently used, and local thermal fatigue can be dispersed and diminished by the planned pattern setting, and the life of the turbine system equipment can be extended.

According to the third aspect of the present invention, a combination of a plurality of flow distribution pattern generators and a plurality of corresponding patterns of the plurality of valves is preset in order to sequentially open the first valve to the last valve by the setter. While outputting a selection signal to select one of a plurality of combinations of patterns, when a valve abnormality signal is generated in any of the plurality of valves, a valve abnormality signal is generated instead of the selection signal. Another select signal is output so that the valve is the final valve. The switcher switches to output the flow distribution pattern of each flow distribution pattern generator to each corresponding valve based on the selection signal. Therefore,
When a failure occurs in any one of the plurality of valves, it is possible to minimize the influence on the single system failure by automatically shifting to the final valve.

According to the fourth aspect of the present invention, the flow rate distribution pattern is selected from the plurality of flow rate distribution patterns defined by the flow rate distribution pattern generator for sequentially opening the first valve to the final valve by the setting device to the corresponding valves. While outputting the selection signal to the flow rate distribution pattern generator to output it, the valve that generates the valve abnormality signal in place of the selection signal when the valve abnormality signal occurs in any of the plurality of valves is the final valve. Another selection signal is output to the flow rate distribution pattern generator so that it becomes a valve. Therefore, if a failure occurs in any of the multiple valves, by automatically moving to the final valve,
The impact on single system failure can be minimized.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a bypass flow rate distribution control unit provided in a turbine control device showing a first embodiment of the present invention. 1 shows a conventional example, the same reference numerals as in FIG. 7 indicate the same or corresponding portions, and the main difference between them is that a bypass flow distribution control unit 21 is additionally provided with a setting device 26 and a signal switching device 27. That is.

Here, the setter 26 is a valve flow rate request signal y for each of the flow rate distribution pattern generators 25A, 25B, 25C.
1, y2, y3 and the corresponding valve command signals z1, z2, z3 are combined as patterns a, b, c, and patterns a, b,
It outputs one of the selection signals of c. Signal switch 27
Is a, b, c according to the selection signal of patterns a, b, c.
The switching device is switched.

Next, the operation of the bypass flow rate distribution control unit 21 having the above configuration will be described.

First, the bypass valve flow rate request signal x output from the comparator 20 shown in FIG. 6 is input to the flow rate distribution pattern generators 25A, 25B and 25C. In the flow rate distribution pattern generators 25A, 25B, and 25C, as shown in FIG. 2, first, the valve flow rate request signals y1, y2, which are preset for each valve according to the bypass valve flow rate request signal x, are set.
y3 is output.

On the other hand, in the setter 26, each valve command signal z
1, z2, z3 for each valve flow rate request signal y1, y2
Patterns a, b, and c are set as to which of y3 is to be applied, and are given to the signal switch 27. The signal switch 27 outputs the valve flow rate request signals y1, y2, y3 as the valve command signals z1, z2, z3 according to any of the patterns a, b, c set by the setter 26.

For example, when the pattern a is selected by the setter 26, the valve command signal z1 to the bypass valve 6A is selected.
Is the valve flow rate request signal y1 from the flow rate distribution pattern generator 25A, the valve command signal z2 to the bypass valve 6B is the valve flow rate request signal y2 from the flow rate distribution pattern generator 25B, and the valve command signal z3 to the bypass valve 6C is the flow rate. It becomes the valve flow rate request signal y3 by the distribution pattern generator 25C.

Next, in the case of selecting the pattern b, similarly, the flow rate distribution pattern generator 25B (valve flow rate request signal y
2) becomes the valve command signal z1 (bypass valve 6A), the flow rate distribution pattern generator 25C (valve flow rate request signal y3) becomes the valve command signal z2 (bypass valve 6B), and the flow rate distribution pattern generator 25A (valve flow rate request signal). y1) becomes the valve command signal z3 (bypass valve 6C).

Next, in the case of selecting the pattern c, similarly, the flow rate distribution pattern generator 25C (valve flow rate request signal y
3) becomes the valve command signal z1 (bypass valve 6A), the flow rate distribution pattern generator 25A (valve flow rate request signal y1) becomes the valve command signal z2 (bypass valve 6B), and the flow rate distribution pattern generator 25B (valve flow rate request signal). y2) becomes the valve command signal z3 (bypass valve 6C).

As described above, the valve command signals z to the bypass valves 6A, 6B and 6C are arbitrarily selected by the setting device 26.
1, z2, z3 can have an arbitrary flow distribution pattern, whereby the bypass valves 6A, 6B, 6C can be controlled in an arbitrary opening / closing order, and further, by the planned pattern setting, the temperature reducing / pressure reducing device. The local thermal fatigue of each bypass valve pipeline system including 7 and the condenser 8 can be dispersed and reduced.

In the above embodiment, the bypass valve is 3
Although the case of the valve has been described as an example, it goes without saying that the present invention is not limited to this and can be applied to the case of arbitrary plural bypass valves.

FIG. 3 is a block diagram of a bypass flow rate distribution control unit provided in a turbine control device showing a second embodiment of the present invention. 3 is different from the conventional example shown in FIG. 7 in that the setting device 26 and the flow rate distribution pattern generators 28A, 28B, 28 are used.
That is, C is provided.

Here, the setter 26 outputs one of the pattern signals selected from the preset patterns a, b, and c to the flow rate distribution pattern generators 28A, 28B, and 2.
It outputs to 8C. Flow rate distribution pattern generator 2
8A, 28B, 28C are the corresponding bypass valves 6A, 6
The distribution pattern corresponding to the pattern signal from the setter 26 is output from the distribution patterns of the valve command signal Z to the plurality of bypass valve flow rate request signals set in advance to B and 6C.

Next, the operation of the bypass flow rate distribution control unit 28 having the above configuration will be described.

First, the bypass valve flow rate request signal x output from the comparator 20 shown in FIG. 6 is input to the flow rate distribution pattern generators 28A, 28B and 28C. The flow rate distribution pattern generators 28A, 28B, and 28C have flow rate control characteristics shown in FIGS. 4 (A), (B), and (C) depending on the conditions from the setter 26.
As shown in FIG. 5, the dead zone value until the valve command signal z is output with respect to the bypass valve flow rate request signal x is variable.

For example, the relationship between the output flow rate characteristics from the flow rate distribution pattern generators 28A, 28B and 28C and the valve command signals z1, z2 and z3 with respect to the selection pattern of the setter 26 is as follows.

That is, the pattern a is set by the setter 26.
4 is selected, the flow rate distribution pattern generator 28A is set as shown in FIG.
The pattern shown in FIG. 4A is shown in FIG. 4A, the flow distribution pattern generator 28B is shown in FIG. 4B, and the flow distribution pattern generator 28C is shown in FIG. 4C. Becomes Further, when the pattern b is selected by the setter 26, the flow rate distribution pattern generator 28A is set as shown in FIG.
The pattern of (b) of FIG. 4A, the flow distribution pattern generator 28B is the pattern of FIG. 4B, and the flow distribution pattern generator 28C is the pattern of FIG. 4C. Becomes Further, when the pattern c is selected by the setter 26, the flow rate distribution pattern generator 28A is set as shown in FIG.
The pattern of (c) of FIG. 4A, the flow distribution pattern generator 28B is the pattern of FIG. 4C, and the flow distribution pattern generator 28C is the pattern of FIG. 4C. Becomes With this configuration, the same operation and effect as those of the first embodiment can be obtained.

In the second embodiment, the bypass valve is 3
Although the case of the valve has been described as an example, it goes without saying that the present invention is not limited to this and can be applied to the case of arbitrary plural bypass valves.

Further, the present invention can be applied not only to the bypass system but also to the turbine control valve system, and it is possible to disperse or reduce the local thermal fatigue due to the injection of the control valve portion during the partial load operation. is there.

FIG. 5 is a system diagram around the bypass valve control unit provided in the turbine control device showing the third embodiment of the present invention. The main difference between FIG. 5 and FIG. 6 as a conventional example is that anomaly detectors 29A, 29B and 29C are newly provided, and
The configuration of the bypass flow rate distribution control unit 21 is different from that of the bypass flow rate distribution pattern generator 30.

Here, the abnormality detectors 29A, 29B, 29
C is each actual opening signal of the bypass valve opening detectors 23A, 23B, 23C and each bypass valve command signal z1, z2, z3.
An abnormal signal is output for each valve when the deviation signal between and is greater than a predetermined value.

When an abnormal signal is input and the first control valve (the valve that opens and closes first) becomes abnormal, the flow rate distribution pattern generator 30 sets the first control valve to the final valve (the valve that opens and closes last). The switching is performed as follows.

Next, the operation of the above configuration will be described.

Bypass valve control units 22A, 22B, 22C
Each deviation signal from each comparator 32 of
Input to A, 29B and 29C. Thereby, in each abnormality detector 29A, 29B, 29C, each bypass valve detected by each bypass valve opening detector 23A, 23B, 23C for each valve command signal z1, z2, z3 due to valve stick or valve system failure. It is detected whether or not the actual opening signal cannot follow. Then, each abnormality detector 29A, 29
The abnormal signal detected by B and 29C is input to the setter 31 of the flow rate distribution pattern generator 30. In the flow rate distribution pattern generator 30, when the abnormal signal is the first control valve of the pattern set at that time, the flow pattern is automatically switched to the next pattern.

Further, as a setter 31 of the third embodiment in place of the setters 26 of FIGS. 1 and 3 of the first and second embodiments, some malfunction occurs in the bypass valve 6A system during operation in pattern a. Automatically occurs, the pattern b is automatically switched to the pattern b.
When some failure occurs in the B system, it is automatically switched to the pattern c, and when some failure occurs in the bypass valve 6C system during the operation in the pattern c, the switch is automatically performed to the pattern a.

As described above, in the case where a valve stick of the first control valve or a failure of the bypass system occurs in a plurality of bypass systems, the pattern for determining the opening / closing order of the bypass valves is automatically switched, and the valve of the failed system is finally set. By switching to the control valve, plant operation can be continued without affecting pressure control even if a single system failure occurs.

In the above embodiment, the bypass valve is 3
Although the case of the valve has been described as an example, it goes without saying that the present embodiment is not limited to this and can be applied to the case of arbitrary plural bypass valves. In addition, in the third embodiment, when the first control valve is abnormal, the first control valve is switched to the final valve, but the control valve is not limited to the first control valve Can be switched to the final valve as appropriate.

[0055]

As described above, according to the present invention, the flow rate distribution pattern of each flow rate distribution pattern generator is switched to be output to each corresponding valve based on the selection signal. Therefore, only the same valve is not frequently used, and local thermal fatigue can be dispersed and diminished by the planned pattern setting, and the life of the turbine system equipment can be extended.

Another aspect of the present invention is to output a selection signal for selecting one of a plurality of combinations of patterns while replacing the selection signal when a valve abnormality signal is generated in any of the valves. Another selection signal is output so that the abnormal valve becomes the final valve. As a result, the flow rate distribution pattern of each flow rate distribution pattern generator is switched to be output to each corresponding valve based on the selection signal. Therefore, when a failure occurs in any of the valves, the effect on the single system failure can be minimized by automatically shifting to the last valve.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a bypass flow rate distribution control unit included in a turbine control device showing a first embodiment of the present invention.

FIG. 2 is a characteristic diagram of a flow rate distribution pattern generator provided in the bypass flow rate distribution control unit of FIG.

FIG. 3 is a configuration diagram of a bypass flow rate distribution control unit included in a turbine control device showing a second embodiment of the present invention.

FIG. 4 is a characteristic diagram of a flow rate distribution pattern generator included in the bypass flow rate distribution control unit of FIG.

FIG. 5 is a configuration diagram around a bypass flow rate distribution control unit provided in a turbine control device showing a third embodiment of the present invention.

FIG. 6 is a system diagram of a turbine control device.

FIG. 7 is a configuration diagram of a bypass flow rate distribution control unit included in a conventional turbine control device.

[Explanation of symbols]

 6A, 6B, 6C Bypass valve 21 Bypass flow rate distribution control section 22A, 22B, 22C Bypass valve control section 25A, 25B, 25C Flow rate distribution pattern generator 27 Signal switch 28A, 28B, 28C Flow rate distribution pattern generator 29A, 29B, 29C Abnormality detector 30 Flow distribution pattern generator 31 Setting device 32 Comparator 33 Amplifier

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F01D 21/14 B G05B 9/03

Claims (4)

[Claims] 1. A plurality of valves are sequentially arranged in a first order in response to a total flow rate demand.
In a turbine control device that controls the steam flow rate by opening the valve from the valve to the final valve and distributing the total flow rate request by the plurality of valves, a flow rate is provided corresponding to each of the first valve to the final valve. A flow rate distribution pattern generator that generates a flow rate distribution pattern in which the characteristics of the request and the valve command are preset, and a plurality of combinations that sets the opening order of the plurality of valves corresponding to the first valve to the final valve. A presetter that outputs a selection signal to select one of the plurality of combinations, and a valve that is set in the flow distribution pattern of each of the flow distribution pattern generators based on the selection signal. A turbine control device comprising: a switch that switches a command to be output to a corresponding valve. 2. A plurality of valves are sequentially arranged in a first order in response to a total flow rate demand.
In a turbine control device that controls the steam flow rate by opening the valves from the valve to the final valve and distributing the total flow rate request with the plurality of valves, the flow rate request and the valve are provided corresponding to the plurality of valves. A plurality of flow rate distribution patterns whose characteristics with the command are set in advance are defined, a flow rate distribution pattern corresponding to the selection signal is generated, and a flow rate distribution pattern generator which outputs the flow rate distribution pattern to the corresponding valve and the first valve to the final A plurality of combinations that set the opening order of the plurality of valves corresponding to the valves are set in advance, and the selection signal is output to the flow rate distribution pattern generator to select one of the plurality of combinations. And a setting device for controlling the turbine. 3. A plurality of valves are sequentially arranged in a first order in response to a total flow rate demand.
In a turbine control device that controls the steam flow rate by opening the valve from the valve to the final valve and distributing the total flow rate request by the plurality of valves, a flow rate is provided corresponding to each of the first valve to the final valve. A flow rate distribution pattern generator that generates a flow rate distribution pattern in which the characteristics of the request and the valve command are preset, and an abnormality detector that outputs a valve abnormality signal based on the deviation signal between the valve command of each valve and the actual opening degree. , Presetting a plurality of combinations for setting the opening order of the plurality of valves corresponding to the first valve to the final valve, and outputting a selection signal to select one of the plurality of combinations On the other hand, when a valve abnormality signal is generated in any of the plurality of valves, a setting device that outputs another selection signal so that the valve that has generated the valve abnormality signal becomes the final valve instead of the selection signal, , The selection output by this setter A turbine control device comprising: a switch that switches a valve command set in the flow rate distribution pattern of each of the flow rate distribution pattern generators to output to a corresponding valve based on a signal. 4. A plurality of valves are sequentially arranged in a first order in response to a total flow rate demand.
In a turbine control device that controls the steam flow rate by opening the valves from the valve to the final valve and distributing the total flow rate request with the plurality of valves, the turbine control device is provided corresponding to each of the plurality of valves, and the flow rate request and A plurality of flow rate distribution patterns with preset characteristics with the valve command are defined, a flow rate distribution pattern corresponding to the selection signal is generated, and a flow rate distribution pattern generator for outputting to the corresponding valve and the valve command for each valve And the actual opening, an abnormality detector that outputs a valve abnormality signal based on a deviation signal and a plurality of combinations that sets the opening order of the plurality of valves corresponding to the first valve to the last valve are preset. While outputting the selection signal to the flow rate distribution pattern generator in order to select one of the plurality of combinations, the selection is performed when the valve abnormality signal is generated in any of the plurality of valves. Instead of the signal A turbine controller comprising: a setting device that outputs another selection signal to the flow rate distribution pattern generator so that the valve that has generated the valve abnormality signal becomes the final valve.