JP2003247401A - Apparatus for monitoring and controlling turbine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems with an arithmetic processing module of a recent master controller which is so enhanced in processing capacity as to enable execution of a function to be executed by a system controller: that (1) no means is available for judging state of the master controllers 21a-21c, and (2) no means is available for editing individual control processing information on the basis of the means for judging the state of the master controllers 21a-21c, for the purpose of obtaining system information required for a turbine monitoring device 3 when the function to be executed by the system controller is realized by the master controller. <P>SOLUTION: Functions of the system controller are assigned to the controller and a turbine monitoring device so as to make the system controller unnecessary. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine monitor control device for monitoring and controlling turbine equipment.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. First, an outline of a conventional turbine monitoring control system will be described with reference to FIG. As shown in FIG. 7, the turbine monitoring control system includes a turbine control device 2 that controls the turbine device 1 and a turbine monitoring device 3 that monitors the turbine device 1.

Turbine equipment 1 to be monitored and controlled
Is composed of a main body such as a turbine and a generator, and a process system including steam control valves and auxiliary equipment for operating these main bodies. In addition, the turbine control device 2
Is composed of a master controller A system 21a, a master controller B system 21b, a master controller C system 21c, and a system controller 22.

The master controllers 21a to 21c are provided with arithmetic processing modules 24a to 24c and input / output modules 25a to 25c, respectively, and are configured in a multiplexed manner to control the rotational speed of the turbine equipment 1, steam valve position control, and load control. The first control (hereinafter referred to as turbine primary control) that performs high-speed sequence control calculation processing such as the above and input / output processing is performed asynchronously.

Further, the system controller 22 is provided with an arithmetic processing module 26 and an input / output module 27 similarly to the master controller, and does not perform high speed control arithmetic processing and input / output processing such as the sequence control as described above, that is, the so-called second. Control (hereinafter referred to as turbine secondary control)
And an interface function with the turbine monitoring device 3 described later and the master controller 21.
a to 21c of the state monitoring function.

On the other hand, the turbine monitoring device 3 comprises a human machine controller 31, a CRT 32, a mouse 33 and a keyboard 34 for displaying the states of the turbine equipment 1 and the turbine control device 2 and for inputting turbine control operations.

Next, the internal configuration of the master controllers 21a to 21c will be described with reference to FIG. The master controllers 21a to 21c include the process input / output unit 2
12, a turbine primary control calculation unit 211, and an inter-system controller transmission input / output unit 213, and executes the turbine primary control described above.

Further, an internal configuration diagram of the system controller 22 will be described with reference to FIG. The system controller 22 uses a process signal input from the turbine device 1 to obtain a turbine secondary control calculation unit 221 that performs a turbine secondary control calculation, and a signal obtained from a circuit in a master controller control calculation information editing unit 224 described later. Optimal among the master controller state judging means 226 for judging the states of all the master controllers 21a to 21c, and the control calculation information fetched from each master controller 21a to 21c based on the state judgment result of the master controller state judging means 226. Master controller control calculation information editing means 224 for selecting and editing various control calculation information as system information.

The system information edited by the editing means 224 and the individual control calculation information of each master controller are output to the turbine monitoring device 3 via the control network transmission input / output unit 223 and the control network 4. . Reference numeral 222 is a process input / output unit, and 225 is a master controller transmission / input unit.

Further, the internal structure of the turbine monitoring device 3 will be described with reference to FIG. The turbine monitoring device 3 includes a monitoring screen display unit 311 and a display device 32 for displaying system information input from the system controller 22 and individual control calculation information of the turbine control device 2, that is, control calculation information of each master controller 21a to 21c.
An input device such as a mouse 33 and a keyboard 34 for inputting turbine control operation information by an operator, a control operation input unit 312 for outputting the operation information input by this input device to the system controller 22, and control Network transmission input section 313.

[0011]

In the conventional device described above, the master controllers 21a to 21c are not directly connected to the turbine monitoring device 3. The reason is that the function of the system controller cannot be realized with the processing capacity of the arithmetic processing module in the conventional master controller.

However, due to recent improvements in semiconductor manufacturing technology and software technology, the processing capacity of the arithmetic processing module of the master controller has been improved, and it has been proposed to realize the processing function of the system controller by the master controller. . However, in order to realize the function of the system controller by the master controller, the following problems must be solved.

.. There is no means for judging the states of the master controllers 21a to 21c. ． In order to obtain the system information necessary for the turbine monitoring device 3, there is no means for editing the individual control calculation information based on the state determining means of the master controllers 21a to 21c. ． Since the input / output processing of the system controller having a large number of points needs to be processed by the input / output module of the master controller, the number of input / output points is increased by the amount of multiplexing, and the cost of the input / output module is increased.

The present invention has been made in view of the above-mentioned problems, and provides a turbine supervisory control device that does not require a system controller by providing a master controller with a part of the functions of a conventional system controller. The purpose is to

[0015]

In order to achieve the above object, the invention of a turbine monitoring control apparatus according to claim 1 inputs a status signal from a turbine device to execute a control calculation of the turbine device, A turbine control device in which a plurality of controllers that execute processes for outputting a control signal to a turbine device are asynchronously executed, and a turbine control device, which is connected to the turbine control device through a control network, determines the state of each controller. Controller state judging means, control calculating information editing means for selecting and outputting optimum control calculating information as system information from the control calculating information obtained from each controller based on the result of state judgment of the controller state judging means, and the system Information or individual control calculation information obtained from each controller is displayed on the turbine equipment monitoring screen A turbine monitoring device having a screen display means for displaying, consists.

According to the present invention, among the functions realized by the conventional system controller, the controller newly provided with the turbine secondary control function, the conventional master controller state judging function and the editing function of each control calculation information are provided. Since it is configured to be realized with a new turbine monitoring device, a system controller is not required, so a lower cost system can be realized, and the controllers are multiplexed to execute the control function and directly connected to the control network. Therefore, it is possible to prevent the loss of the turbine secondary control function and the turbine monitoring function due to the failure of the controller, and improve the reliability of the entire system.

According to a second aspect of the present invention, there is provided a turbine monitoring control device, wherein a state signal is input from a turbine device, a control operation of the turbine device is executed, and a process of outputting a control signal to the turbine device is asynchronous with each other. A plurality of controllers to be executed in a multiplex configuration, each controller being provided for each controller, controller status judging means for judging the status of its own controller, control for communicating controller individual control calculation information between each controller Control calculation information selected based on a predetermined priority order from among the control calculation information of all the controllers obtained from the control calculation information communication means based on the state determination result of the calculation information communication means and the controller state determination means. Turbine control equipped with control calculation information editing means for selecting and outputting A device, connected to the turbine controller via a control network, and a turbine monitoring device having a screen display means for displaying the selected system information and individual control calculation information Turbine monitoring screen consists.

According to the present invention, since the system information and each control calculation information are edited on the turbine control device side, the priority order of the controllers for outputting the information to the turbine monitoring device should be predetermined. As a result, it is possible to prevent the transmission load amount of the control network from increasing due to the multiplexed controllers outputting the same information redundantly.

Further, in the invention of the turbine monitoring control according to claim 3, in claim 1 or 2, the first control which requires high-speed control calculation processing and input / output processing in each controller is executed. An input / output module used for executing a second control that does not require high-speed control calculation processing and input / output processing independently of the input / output module used for the control network. Is characterized by.

According to the present invention, the controller is in charge of the turbine secondary control function executed by the system controller, and the input / output modules for processing the input / output signals used in the turbine secondary control are individually provided. Since it is shared by the controllers, it is possible to prevent the number of input / output points of the input / output module used in the turbine primary control from increasing more than necessary.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the portions corresponding to those in the configuration diagram of the conventional technique are designated by the same reference numerals or related reference numerals to clarify the correspondence, and duplicate description will be avoided as much as possible.

(First Embodiment) The first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a system configuration diagram of the turbine monitoring control device, and FIG. 2 is an internal configuration diagram of the turbine monitoring control device.

First, referring to FIG. 1, a turbine controller 2A is provided.
Is configured so that a plurality of control targets in the turbine device 1 are controlled by the tripled controllers 21a to 21c. Here, each of the controllers 21a to 21c is composed of a pair of a control calculation module and an input / output module, and inputs the state signal extracted from the control target of the turbine device 1 to input the turbine primary control calculation and the turbine secondary control. A process of executing a calculation and outputting a control signal is performed. The turbine primary control calculation, the turbine secondary control calculation, and the process of outputting the control signal are configured to be executed asynchronously with each other. Each of the controllers 21a to 21c is connected to the turbine monitoring device 3A via the control network 4.

The turbine monitoring device 3A includes a human machine controller 31A that executes an interface function with an operator, a display device 32 such as a CRT or a liquid crystal plate that displays a monitoring screen and an operation screen of turbine equipment, and a mouse 3.
3, an input device such as a keyboard 34, and various information such as a status signal, a control signal, and a calculation result output from the turbine control device 2A is input via the control network 4 to display a turbine device monitoring screen. And has a function of outputting a turbine control operation input by an operator to the turbine control device 2A.

Next, referring to FIG. 2, the turbine controller 2
A and the turbine monitoring device 3A will be described. First, the turbine control device 2A will be described. 2 A of turbine control apparatuses of this invention are comprised by three controllers 21a-21c. In addition, these controllers 21a-21
In addition to the function of the conventional master controller, c additionally has a part of the function of the conventional system controller. Since the internal configurations of these three controllers are the same, 21a will be representatively described.

The controller 21a is controlled by the turbine primary control calculation unit 211 and the turbine secondary control calculation unit 221 based on the state signal input from the control target of the turbine equipment 1 to the process input / output unit 212. The primary control and the turbine secondary control are arithmetically processed, and the arithmetic result is output from the process input / output unit 212 to the control target of the turbine device 1 as a control signal.

The process input / output unit 212 may be provided with an output selection circuit that separately executes only the selection process when the tripled control output signal needs to be selected. In this case, the output selection circuit selects a majority value (2 out of 3) by three inputs for digital information and selects and outputs an intermediate value for analog information.

On the other hand, each of the controllers 21a to 21c
Among the control calculation information such as the status signal, the control signal, and the calculation result owned by the turbine control device, the signal required by the turbine monitoring device 3A for monitoring the turbine equipment is the turbine control device 2A.
Output from the control network transmission input / output unit 223 in the control network 4 and the turbine monitoring device 3 via the control network 4.
It is designed to be input to A.

The turbine monitoring device 3A controls the operation of the operator with the mouse 33 and the keyboard 34.
2 and control network transmission input / output unit 313
It is output as operation information to the turbine control device 2A.

Further, the control calculation information editing section 224 in the turbine monitoring device 3A has the controller status judging section 22.
Each controller 21a-2 based on the judgment result by
System information to be displayed on the turbine device monitoring screen is selected from the respective control calculation information input from 1c. As a result, the selected system information and each control calculation information are displayed on the turbine equipment monitoring screen of the display device 32 via the monitoring screen display unit 311.

The controller status determination unit 226 has a function of monitoring whether the information is normal or abnormal, based on the control calculation information output from each of the controllers 21a to 21c. When the controller state determination unit 226 determines that there is an abnormality, the control calculation information editing unit 224 processes the control calculation information and outputs it. When the control calculation information is digital information, it is output by majority decision (2 out of 3) by 3 inputs, and when it is analog information, an intermediate value is selected and output.

As described above, according to the first embodiment,
Among the functions realized by the conventional system controller 2, the newly provided controller 2A realizes the turbine secondary control function, and the conventional master controller 2
By implementing the state determination function and the control calculation information editing function in the newly provided turbine monitoring device 3A, it is possible to provide a low-cost turbine monitoring control device that does not require the conventional system controller 2. .

Further, since the system controller 2 is deleted and the controller 2A is directly multiplexed via the control network 4, the reliability of the entire system can be improved as compared with the conventional system.

(Second Embodiment) Next, FIG. 3 and FIG.
A second embodiment of the present invention will be described based on FIG. FIG. 3 is a system configuration diagram of the turbine monitoring control device, and FIG. 4 is an internal configuration diagram of the turbine monitoring control device.

First, referring to FIG. 3, the turbine control device 2B according to the present embodiment inputs a status signal from the turbine equipment 1, and performs a turbine primary control calculation, a turbine secondary control calculation, and a control signal to the turbine equipment 1. Is configured to be executed asynchronously with the process of outputting.

Moreover, each of the controllers 21a'-21
Similarly to the above-described embodiment, c ′ is composed of a pair of the control calculation module and the input / output module, and the control calculation modules 24a, 24b, 24c and the input / output modules 25a, 25b, 25c are all triple layers. Has been converted.

Further, these controllers 21a'-21
Each of c'is directly connected to the control network 4 and also has inter-controller control calculation information communication means (hereinafter referred to as inter-controller data transmission path) 28a to 28.
It is connected by c so that information can be exchanged between them. The turbine monitoring device 3 itself is the same as the turbine monitoring device 3 in the related art, and thus the description thereof is omitted.

Next, with reference to FIG. 4, the internal structure of the turbine monitoring control section will be described. Each of the controllers 21a ′ to 21c ′ constituting the turbine control device 2B is based on a state signal input from the turbine device 1 to the process input / output unit 212, and is a turbine primary control calculation unit 211 and a turbine secondary control calculation unit. 221 executes each control calculation, and the calculation result is used as a control signal for the process input / output unit 2
It outputs from 12 to the controlled object of turbine equipment 1. In addition,
When it is necessary to select and process the tripled control signal, it is selected and output in the same manner as in the first embodiment.

Now, each controller 21a'-21c '
Among the control calculation information such as the status signal, the control signal, and the calculation signal possessed by the controller, the information required by the turbine monitoring device 3 for monitoring the turbine equipment is the controller 21a ′.
~ 21c 'are all normal, each controller 21
The controller status determination unit 226 of a ′ to 21c ′ selects the priority according to a predetermined priority order. The selected control calculation information is sent to the control network input / output unit 223.
Output from the turbine monitoring device 3 via the control network 4.

Each of the controllers 21a 'to 21c'
In order to determine whether or not is normal, the controller state determination unit 226 performs control calculation information based on the control calculation information obtained from the control calculation information editing unit 224 provided for each controller, as in the related art. For example, the controller 21a determines that the controller status determination unit 226 has a priority order of
In the order of → 21b → 21c, if all the controllers 21a ′ to 21c ′ are normal, the control calculation information is output from the controller 21a ′ having the highest priority, and if the controller 21a ′ is abnormal. Information is output from the controller 21b 'having the next highest priority.

Further, the turbine control device 2B is provided with an inter-controller data transmission line 28 between the controllers 21a 'to 21c', and the system receives the control calculation information from other control units via this data transmission line 28. Edit the information.

It should be noted that, in the controller state judging section 226,
For the control calculation information determined to be abnormal, the control calculation information editing unit 224 processes the control calculation information and then edits the system information by selecting 2 out of 3 for digital information and an intermediate value for analog information. .

The turbine monitoring device 3 receives the system information and each control calculation information from the control unit of any of the tripled controllers 21a to 21c, and the monitoring screen display unit 311 monitors the turbine equipment of the display device 32. Display information on the screen.

As described above, according to the second embodiment,
Since the system information and each control calculation information are edited on the turbine control device 2B side, the multiplexed controller can be operated by predetermining the priority order of the controllers that output information to the turbine monitoring device 3. It is possible to prevent the transmission load amount of the control network 4 from increasing due to the same information being output redundantly.

(Third Embodiment) Hereinafter, FIGS. 5 and 6 will be described.
The third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a system configuration diagram of the turbine monitoring control device,
FIG. 6 shows an internal configuration diagram of the turbine monitoring controller.

First, referring to FIG. 5, the turbine controller 2C is shown.
Has a triple configuration of controllers 21a ″ to 21c ″ for individually controlling a plurality of controlled objects in the turbine equipment 1, and a turbine secondary control calculation input / output module 27 is provided.

Here, each of the controllers 21a ″ to 21a
c ″ is composed of a pair of control calculation modules 24a to 24c and input / output modules 25a to 25c, respectively, and receives the state signal extracted from the control target of the turbine device 1 to input the turbine primary control calculation and the turbine secondary control calculation. Are executed, and the processes for outputting the control signal are executed asynchronously with each other.

Further, each of these controllers 21a ''-2
1c ″ is shown in FIG. 2 via the control network 4.
Is connected to the same turbine monitoring device 3A. The turbine secondary control calculation input / output module 27 inputs the state signal extracted from the control target of the turbine device 1 and outputs the state signal to the control network 4.

Next, the internal configuration of the turbine monitoring control apparatus according to the third embodiment will be described with reference to FIG. The feature of the third embodiment is that the input / output modules 25a to 25c of the individual controllers 21a "to 21c" are arranged.
Has stopped the processing for secondary turbine control, and instead provided the input / output module 27 for secondary turbine control independently in the turbine control device 2C common to each controller. Since it is the same as the turbine monitoring control device according to the first embodiment, the description of the configuration is omitted.

In the turbine controller 2C, the state signal of the turbine equipment 1 used in the turbine secondary control arithmetic unit 221 which does not require high-speed control arithmetic processing and input / output processing is tripled for turbine primary control. It is not input to the process input / output unit 212, but is input to the turbine secondary control process input / output unit 222. The input status signal is sent from the process input / output unit 222 to each turbine secondary control calculation unit 221 via the control network 4 and the control network transmission input / output unit 223, and the control calculation is executed.

The control signal calculated by each turbine secondary control calculation unit 221 returns to the process input / output unit 222 again via the control network transmission input / output unit 223 and the control network 4 to select the control signal. (For digital information, majority decision by 3 inputs (2 out of 3)
Then, for the analog information, an intermediate value is selected) and is output to the outside.

As described above, according to the third embodiment,
The number of input / output points of the controller's input / output module increases more than necessary by processing the turbine secondary control processing that does not require high-speed control calculation processing and input / output processing by the input / output module provided independently Can be prevented. This embodiment is advantageous as the number of controllers to be multiplexed increases.

[0053]

As described above, in the first invention, among the functions realized by the conventional system controller, a controller newly provided with a turbine secondary control function, a conventional master controller state judgment function and Since the editing function of each control calculation information is configured to be realized by the new turbine monitoring device, a system controller is not required, and thus a lower cost system can be realized. Also, since the controller is multiplexed to execute the control function and is directly connected to the control network, it is possible to prevent the loss of the turbine secondary control function and the turbine monitoring function due to the failure of the controller. The reliability of can be improved.

Further, in the second aspect of the invention, since the system information and each control calculation information are edited on the turbine control device side, the priority order of the controllers for outputting information to the turbine monitoring device is predetermined. With this setting, it is possible to prevent the transmission load amount of the control network from increasing due to the multiplexed controllers outputting the same information redundantly.

Further, in the third invention, the processing for the secondary turbine control carried out by the input / output module of each controller is stopped, and instead an independent input / output module for the secondary turbine control is provided in the turbine controller. By providing this I / O module to perform the processing that was conventionally handled by the I / O module of the system controller, it is possible to increase the number of I / O points of the I / O module of the controller more than necessary when multiplexing. Can be prevented.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a turbine monitoring control apparatus according to a first embodiment of the present invention.

FIG. 2 is an internal configuration diagram of the turbine monitoring control device according to the first embodiment of the present invention.

FIG. 3 is a system configuration diagram of a turbine monitoring control device according to a second embodiment of the present invention.

FIG. 4 is an internal configuration diagram of a turbine monitoring control device according to a second embodiment of the present invention.

FIG. 5 is a system configuration diagram of a turbine monitoring control device according to a third embodiment of the present invention.

FIG. 6 is an internal configuration diagram of a turbine monitoring control device according to a third embodiment of the present invention.

FIG. 7 is a system configuration diagram of a turbine monitoring control device according to a conventional technique.

FIG. 8 is an internal configuration diagram of a master controller according to a conventional technique.

FIG. 9 is an internal configuration diagram of a system controller according to a conventional technique.

FIG. 10 is an internal configuration diagram of a turbine monitoring device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Turbine equipment, 2A, 2B, 2C ... Turbine control device, 3 3A, ... Turbine monitoring device, 4 ... Control network, 21a ... Controller A system, 21b ... Controller B system, 21c ... Controller C system, 24a, 24
b, 24c ... Controller arithmetic processing module, 25
a, 25b, 25c ... Controller input / output module,
27 ... System controller input / output module, 28,
28a, 28b, 28c ... Control calculation information communication means, 31
... Human machine controller, 32 ... Display device (C
RT), 33 ... Mouse, 34 ... Keyboard, 221, ... Turbine secondary control calculation unit, 222 ... Process input / output unit, 2
23 ... Control network transmission input / output unit, 224 ... Control calculation information editing unit, 225 ... Master controller transmission / input unit, 226 ... Controller state determination unit, 211 ... Turbine primary control calculation unit, 212 ... Process input / output unit Two
13 ... System controller transmission / input unit, 311 ...
Monitoring screen display section 312 ... Control operation input section, 313 ... Control network transmission input / output section.

Claims (3)

[Claims] 1. A status signal is input from a turbine device,
A turbine control device that performs a control operation of a turbine device and multiplexes a plurality of controllers that perform a process of outputting a control signal to the turbine device asynchronously with each other,
Controller state determination means connected to the turbine control device via a control network for determining the state of each controller, and control calculation information obtained from each controller based on the state determination result of the controller state determination means Turbine monitoring device having control calculation information editing means for selecting and outputting optimum control calculation information as system information, and screen display means for displaying the system information or individual control calculation information obtained from each controller on a turbine equipment monitoring screen And a turbine monitoring and control device. 2. A status signal is input from a turbine device,
A plurality of controllers that execute a control operation of a turbine device and output a control signal to the turbine device asynchronously with each other are configured in a multiplexed manner, and are provided for each controller, and the state of the own controller is set. Controller status judgment means for judging, control calculation information communication means for communicating controller individual control calculation information between the controllers, and all obtained from the control calculation information communication means based on the status judgment result of the controller status judgment means The control calculation information selected from the control calculation information of the controller on the basis of a predetermined priority order is selected as system information and output, and the turbine control device is equipped with a control calculation information editing unit and a control network. It is connected to the turbine controller and the selected system information and A turbine monitoring device having a screen display means for displaying the individual control operation information to turbine equipment monitoring screen, turbine monitoring controller consisting of. 3. A high-speed control calculation process and an input / output module independent of an input / output module used for executing the first control requiring high-speed control calculation process and input / output process in each controller. The input / output module used for executing the second control which does not require output processing is connected to the control network.
Alternatively, the turbine monitoring control device according to the item 2.