JP2003337616A - Plant control method and plant control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly cope with the review of control information of a plant at a request of a plant user. <P>SOLUTION: A control computer 7 and a control unit 8 access to a simulation test server 4, according to instructions received from a simulation terminal 2, and upload the control information set up in own unit. The simulation server 4 uses the request information reflecting the correction contents to this control information and the plant model information registered in a plant model DB 3, and simulates plant operation, when the control computer 7 and the control unit 8 are actuated according to this request information. Then, when it is simulated that the plant operates normally, the server accesses the control computer 7, and the control unit 8 and uploads the requesting information. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for setting plant control information (information about control logic and parameters).

[0002]

2. Description of the Related Art Automated operation technology has been introduced as part of the rationalization of plant operation work at power plants and the like. In a plant in which automated operation technology has been introduced, the control computer and various control devices each have their own control logic and parameters (control set values,
It operates according to control information such as alarm value). As a result, the plant is automatically operated.

[0003]

If the user of the plant can freely change the above-mentioned control information, the plant operation work may be hindered. Therefore, the review of the control information is performed by a business operator who maintains and manages the plant based on the request of the user of the plant at the time of the regular test operation, which is usually performed in a cycle of 2 to 4 years. Then, the business operator goes to the actual equipment of the plant, resets the control information reflecting the review result in the control computer and various control devices, and then confirms whether there is a problem through the trial operation of the plant. Therefore, conventionally, it has not been possible to immediately respond to the request of the plant user.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to make it possible to promptly respond to a user's request for a review of plant control information.

[0005]

In order to solve the above problems, the present invention provides a plant control computer and a control device, a simulation test server network-connected to the control computer and the control device, and The plant operation is controlled using a plant model database in which model information, which is information necessary for simulating the operation of the plant, is stored.

First, the control computer and the control device access the simulation test server and upload the control information set in the control computer and the control device to the simulation test server. Next, the simulation test server uses the model information stored in the plant model database and the request information in which the uploaded control information is changed to determine the control computer and the control device. The operation of the plant when operated according to the request information is simulated.
Then, when it is possible to simulate that the plant operates normally, the simulation test server uploads and sets the request information to the control computer and the control device.

According to the present invention, it is necessary for a business operator who maintains and manages a plant to visit the actual plant, reset the control information in the control computer and the control device, and perform a trial run of the plant for confirmation. Disappear. Therefore, it is possible to promptly respond to the user's request to review the control information of the plant.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

FIG. 1 is a diagram showing a schematic configuration of a plant control system to which an embodiment of the present invention is applied.

On the plant user side, the control computer 7 and the control device 8 constitute a part of the plant, and these devices control and operate the plant. Then, the control computer 7 and the control device 8 are LA
N is connected to the network 52, and further,
The network 52 is a WAN via the gateway 6.
Etc. are connected to the network 53.

On the other hand, on the maintenance / management company side, a simulation test server 4 for simulating plant operation, and information necessary for simulating plant operation of a plant user (hereinafter referred to as model information) are stored. The plant model DB (database) 3 and the simulation terminal 2 for presenting the simulation result to the maintenance / management company and receiving various instructions from the maintenance / management company are L
The network 51 is connected to a network 51 such as an AN, and the network 51 is further connected to the network 53 via the gateway 1.

In the above-mentioned configuration, the control computer 7 and the control device 8 access the simulation test server 4 according to the upload instruction received from the simulation terminal 2 via the network 53. Then, control information such as control logic and parameters (control set values, alarm values, etc.) set in the device itself is uploaded to the simulation test server 4.

The simulation test server 4 uses the control information uploaded from the control computer 7 and the control device 8 and the model information of the plant user registered in the plant model DB 3 according to the simulation instruction from the simulation terminal 2. Then, the operation of the plant when the control computer 7 and the control device 8 are operated according to this control information is simulated, and the plant state of the plant is reproduced. Then, the change content received from the maintenance / management company via the simulation terminal 2 is reflected in the control information, and the control computer 7 and the control device are controlled according to the control information (hereinafter referred to as request information) in which the change content is reflected. The operation of the plant when 8 is operated is simulated. Then, when it is possible to simulate that the plant operates normally, the control computer 7 and the control device 8 are accessed via the network 53, and the request information is uploaded to the control computer 7 and the control device 8.

As a result, the control computer 7 and the control device 8 control the plant according to the uploaded control information. That is, the plant operates according to the revised control information. Here, for the communication using the network 53 between the maintenance / management business side and the plant user side, a method that ensures security such as cryptographic communication may be used.

Next, each device constituting the above plant control system will be described. However, the gateway 1,
No. 6 can use an existing device, and therefore its description is omitted.

First, the control computer 7 and the control device 8 will be described.

The control computer 7 is an information processing device that generates an instruction to the control device 8. For example, as shown in FIG. 2, a CPU 901, a memory 902, an external storage device 903 such as an HDD, a reading device 905 for reading information from a portable storage medium 904 such as a CD-ROM or a DVD-ROM, and a keyboard. Device 90 such as a mouse or mouse
6, an output device 907 such as a display, and a communication device 9 for communicating with a partner device via a network.
08, a general computer system including the above can be realized by the CPU 901 executing a predetermined program loaded on the memory 902. Here, for example, an external storage device 903 is used as a means for registering the control information.

The control device 8 is an information processing device for controlling the equipment that constitutes the plant. For example, in the computer system in which the interface with the equipment to be controlled is added to the computer system shown in FIG.
It can be realized by the CPU 901 executing a predetermined program loaded on the memory 902.
Here, as with the case of the control computer 7, for example, an external storage device 903 is used as a means for registering the control information.

Next, the simulation terminal 2 will be described.

The simulation terminal 2 is a network terminal for presenting simulation results to a maintenance / management company, receiving various instructions from the maintenance / management company, and transmitting them to a target device, and is a control computer. 7
Like the control device 8 and the control device 8, for example, in the computer system of FIG. 2, the CPU 901 can be realized by executing a predetermined program loaded on the memory 902.

Next, the plant model DB 3 will be described.

FIG. 3 is a functional block diagram of the plant model DB 3. As shown, the network IF unit 3
1, a model information management unit 32, and a model information storage unit 33
Have and. FIG. 4 shows an example of registered contents in the model information storage unit 33. As illustrated, in the model information storage unit 33, model information 332, which is information necessary for simulating plant operation, is registered for each plant user in association with the plant user identification information 331. The model information management unit 32 uses the network IF
The model information received via the unit 31 is registered / updated in the model information storage unit 33, or the network IF unit 31
According to the instruction received via the model information storage unit 33.
The model information is read from and transmitted to the sender of the instruction.

The plant model DB 3 is also stored in the control computer 7
Like the control device 8 and the control device 8, for example, in the computer system of FIG. 2, the CPU 901 can be realized by executing a predetermined program loaded on the memory 902. In this case, for example, the external storage device 903 is used as the model information storage unit 33.

Next, the simulation test server 4 will be described.

FIG. 5 shows the simulation test server 4
It is a functional block diagram of. As illustrated, the network IF unit 41 and the simulation test execution unit 42
And a model information storage unit 43 and a control information storage unit 44. The model information storage unit 43 stores the model information of the plant that simulates the operation, and the control information storage unit 44 stores the control information set in the control computer 7 and the control device 8 of the plant. The simulation test execution unit 42 follows the instruction received from the simulation terminal 2 via the network IF unit 41, and the control computer 7 and the control device 8 of the plant specified by the model information stored in the model information storage unit 43. Is operated according to the control information stored in the control information storage unit 44, the operation of the plant is simulated. Here, as the simulation method itself, an existing technique can be used.

In the simulation test server 4 as well as the control computer 7 and the control device 8, for example, in the computer system of FIG. 2, the CPU 901 has a memory 902.
It can be realized by executing a predetermined program loaded above. In this case, for example, an external storage device 903 is used as the model information storage unit 43 and the control information storage unit 44.

Next, the operation of the plant control system having the above configuration will be described.

FIG. 6 is a diagram for explaining the operation of the plant control system to which the embodiment of the present invention is applied.

First, when the plant whose control information is to be reviewed is in the operation stop state, the simulation terminal 2 creates an upload instruction to the simulation test server 4 in accordance with the instruction from the operator (maintenance / management company). Is transmitted to the network 51. This upload instruction is sent to the control computer 7 and the control device 8 of the review target plant via the gateway 1, the network 53, the gateway 6 and the network 52 (ST6001).

Upon receipt of the upload instruction from the simulation terminal 2, the control computer 7 and the control device 8 of the plant to be reviewed access the simulation test server 4 to obtain the control information set in the own device.
It is uploaded to the simulation test server 4 together with the identification information of its own device (ST6002). Thereby, the control information, together with the identification information, is stored in the gateway 6, the network 53, the gateway 1 and the network 5.
1 to the simulation test server 4 (ST6003). Simulation test server 4
Upon receiving the control information together with the identification information via the network IF unit 41, the simulation test execution unit 42 of FIG. 11 registers these in the control information storage unit 44 (ST60).
04).

After the control information has been uploaded to the simulation test server 4, the simulation terminal 2 creates a simulation instruction including the identification information of the plant to be reviewed according to the instruction from the operator, and executes this simulation test. Transmit to server 4 (ST6005).

In the simulation test server 4, when the simulation test execution unit 42 receives a simulation instruction from the simulation terminal 2 via the network IF unit 41, the plant model DB 3
To output a model information reading instruction including the identification information included in the simulation instruction (S
T6006). When the model information management unit 32 of the plant model DB 3 receives the model information read instruction from the simulation test server 4 via the network IF unit 31, the model information management unit 32 writes the identification information included in the model information read instruction from the model information storage unit 33. The associated model information is read (ST6007) and transmitted to the simulation test server 4 (ST600).
8).

In the simulation test server 4, when the simulation test execution unit 42 receives the model information from the plant model DB 3 via the network IF unit 31, it stores it in the model information storage unit 43. Then, the simulation test execution unit 42
In the case where the control computer 7 and the control device 8 of the plant specified by the model information stored in the model information storage unit 43 are operated according to the control information stored in the control information storage unit 44. The plant operation is simulated (ST6009). Then, the simulation result is transmitted to the simulation terminal 2 via the network IF unit 41 (ST601).
0).

Upon receiving the simulation result from the simulation test server 4, the simulation terminal 2 notifies the operator (maintenance / management company) of this by displaying it on a display device (ST6011). This allows the operator to confirm the current operation status of the plant to be reviewed.

When the simulation terminal 2 receives the correction content of the control information of the simulated plant from the operator, it accesses the simulation test server 4 and sends the correction content (ST6012).
In the simulation test server 4, when the simulation test execution unit 42 receives the correction content of the control information from the simulation terminal 2 via the network IF unit 41, the control information stored in the control information storage unit 44 according to the correction content. Is updated (ST601
3). Then, the simulation test execution unit 42
Is the control computer 7 and the control device 8 of the plant specified by the model information stored in the model information storage unit 43.
Is operated according to the updated control information (request information) stored in the control information storage unit 44,
Simulate the operation of the plant (ST601
4). Then, the simulation result is transmitted to the simulation terminal 2 via the network IF unit 41 (ST6015).

Upon receiving the simulation result from the simulation test server 4, the simulation terminal 2 informs the operator (maintenance / management company) by displaying the simulation result on the display device (ST6016). Thereby, the operator can confirm whether or not the plant is operated as desired when the control computer 7 and the control device 8 are operated according to the request information.

After that, when the plant to be reviewed is in the operation stop state, the simulation terminal 2 instructs to upload the plant to be reviewed to the control computer 7 and the control device 8 according to the instruction of the operator (maintenance / management company). Is created and transmitted to the network 51 (ST6017).

In the simulation test server 4, when the simulation test execution unit 42 receives an upload instruction from the simulation terminal 2 via the network IF unit 41, it reads out the desired information from the control information storage unit 44 and reviews it for the plant to be reviewed. Upload to control computer 7 and control device 8 (ST6
018). As a result, the request information is the gateway 1,
It is sent to the control computer 7 and the control device 8 of the review target plant via the network 53, the gateway 6 and the network 52 (ST6019). The control computer 7 and the control device 8 of the review target plant set the request information received from the simulation test server 4 as control information (ST6020). As a result, the control computer 7 and the control device 8 operate in accordance with the re-examined control information, thereby operating the plant.

The embodiment of the present invention has been described above.

According to the present embodiment, the plant maintenance / management company needs to go to the actual plant and reset the control information in the control computer 7 and the control unit 8 to make a trial run of the plant for confirmation. Disappear. For this reason, it is possible to quickly respond to the review of the control information of the plant according to the request of the plant user.

Here, the effect of the present embodiment will be described more specifically by taking the case where the plant is a thermal power generation facility as an example. In this case, as the model information, the metal temperature drop curve, the main steam pressure, the main steam temperature, etc. can be considered, and as the control information, the turbine start control logic, the turbine acceleration control logic, etc. can be considered.

(1) Example of Parameter Retuning for Calculating Turbine Life Consumption It is preferable to accurately calculate the turbine life consumption in order to determine the maintenance and replacement time of the turbine. Here, the turbine life can be represented by fatigue due to thermal stress of the high-pressure turbine rotor and the medium-pressure turbine rotor. Since the turbine rotor produces the largest thermal stress on the surface, the thermal stress of the turbine rotor can be derived by obtaining the surface thermal stress. That is, the thermal stress of the turbine rotor can be obtained from the surface temperature of the rotor and the average temperature inside the rotor, using the longitudinal elastic coefficient of the rotor material and the linear expansion coefficient of the rotor material as parameters.

Now, it is assumed that the control computer 7 is set with the longitudinal elastic modulus of the rotor material of each of the high-pressure turbine rotor and the intermediate-pressure turbine rotor and the linear expansion coefficient of the rotor material as parameters. Then, the control computer 7
Obtaining the surface temperature of the rotor and the average temperature in the rotor of each of the high-pressure turbine rotor and the intermediate-pressure turbine rotor detected by a sensor or the like not shown, and calculating the thermal stress of each of the high-pressure turbine rotor and the intermediate-pressure turbine rotor, Further, it is assumed that the turbine life consumption is calculated from the thermal stress of each of the high pressure turbine rotor and the medium pressure turbine rotor. The longitudinal elastic coefficient of the rotor material and the linear expansion coefficient of the rotor material may be subtly changed due to deterioration over time. Therefore, in order for the control computer 7 to accurately calculate the turbine life consumption amount, in order to accurately calculate the turbine life consumption amount, the longitudinal elastic coefficients of the rotor materials of the high-pressure turbine rotor and the intermediate-pressure turbine rotor set in the control computer 7 and the rotor It is necessary to retune the linear expansion coefficient of the material according to deterioration over time.

In such a case, in the present embodiment, control information including parameters including the longitudinal elastic modulus of the rotor material of each of the high-pressure turbine rotor and the intermediate-pressure turbine rotor and the linear expansion coefficient of the rotor material is stored in the control computer 7 and the control information. The controller 8 uploads the simulation test server 4 and retunes the longitudinal elastic coefficient of the rotor material and the linear expansion coefficient of the rotor material included in the control information according to the deterioration over time, and the control information and model after the retuning. The information is used to simulate the operation of the plant, and it is confirmed whether there is any problem. Then, after confirming that there is no problem, the control information after retuning is uploaded from the simulation test server 4 to the control computer 7 and the control device 8. As a result, the control computer 7
Enables accurate calculation of turbine life consumption.

(2) Examples of improving turbine warming logic DSS (Daily Strat and Stop) and WSS (Weekly Str)
There are power plants operated by load adjustment thermal power such as at and Stop). Such power plants are shut down more frequently than conventional power plants. By the way, a thermal power generation facility requires a large amount of fuel, electric power, water supply, chemicals, and the like at the time of startup until steam that satisfies turbine ventilation conditions is created. At power plants operated by DSS and WSS,
It is more desirable than ever to reduce these start-up losses compared to conventional power plants.

Consider a case where the turbine ventilation condition is reviewed to shorten the startup time. Now, the controller 8 is equipped with a boiler ignition, a BE (Boiler Extraction) valve open, and a TB (Turbine B).
ypass) The operating conditions (main steam temperature, main steam pressure, time, etc.) are set as parameters for each of valve opening, valve configuration start / end, and turbine reset. Then, the control device 8 controls the boiler, the BE valve, the TB valve, the turbine, and the like according to the main steam temperature and the main steam pressure detected by a sensor (not shown) and the parameters set in the self device, and controls the turbine. Suppose it is running.

In this embodiment, control information including these parameters is uploaded from the control computer 7 and the control device 8 to the simulation test server 4,
In the simulation test server 4, reference numeral 70 in FIG. 7 is used by using the control information and the model information of the plant.
It is assumed that the turbine startup is simulated as indicated by 01, and as a result, the main steam temperature is 7003 in FIG. 7. From this result, the following can be understood. That is, the main steam temperature slightly decreases due to the opening of the TB valve, but continues to rise during the subsequent valve configuration for starting the turbine (starting all-around injection), so that the temperature becomes sufficiently high when the turbine is ventilated. It is a positive mismatch.

Therefore, immediately after the BE valve is opened, turbine reset is performed to change the valve configuration timing, and
The time required for valve configuration is shortened by switching to manual configuration, and the timings for TB valve opening and BE valve closing are reviewed. Then, by using the control information in which the contents of the review are reflected and the model information of the plant, reference numeral 70 in FIG.
Simulate turbine startup as shown at 02. As a result, it is assumed that the main steam temperature is 7004 in FIG. 7. From this result, the turbine startup is changed from the positive mismatch to the negative mismatch, which can be expected to significantly reduce the turbine startup time.

When the improvement of the turbine startup time can be confirmed as described above, the revised control information is uploaded from the simulation test server 4 to the control computer 7 and the control device 8. Thereby, the control device 8
Makes it possible to start the turbine with a negative mismatch and shorten the turbine start-up time.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the invention.

For example, in the above embodiment, the case where the simulation terminal 2, the plant model DB 3, and the simulation test server 4 are constructed on different computer systems and these are interconnected by the network 51 has been described as an example. However, these devices may be built on one computer system. Further, the configurations of the control computer 7 and the controller 8 are determined depending on the target plant,
The number and the network configuration are not limited to those shown in FIG.

[0052]

As described above, according to the present invention,
It becomes possible to promptly respond to the request of the plant user for reviewing the control information of the plant.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a plant control system to which an embodiment of the present invention is applied.

FIG. 2 is a diagram showing a hardware configuration example of each device constituting the plant control system shown in FIG.

FIG. 3 is a functional block diagram of a plant DB 3 shown in FIG.

FIG. 4 is a diagram showing an example of registered contents of a model information storage unit 33 shown in FIG.

5 is a functional block diagram of a simulation test server 4 shown in FIG.

FIG. 6 is a diagram for explaining the operation of the plant control system shown in FIG. 1.

FIG. 7 is a diagram showing a simulation result of turbine startup by reviewing turbine ventilation conditions.

[Explanation of symbols]

1 ... Gateway, 2 ... Simulation terminal, 3 ... Plant model DB, 4 ... Simulation test server, 6 ... Gateway, 7 ... Control computer, 8 ... Control device, 31 ... Network IF section, 32 ... Model information management section, 33 Model information storage unit 41 Network IF
42 ... Simulation test execution unit, 43 ... Model information storage unit, 44 ... Control information storage unit, 51 ... Network, 52 ... Network, 53 ... Network

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takumi Otsu             Hitachi 2-3-1, Saiwaicho, Hitachi-shi, Ibaraki             Engineering Co., Ltd. F-term (reference) 5H223 AA02 BB09 CC09 DD07 EE01                       EE11 FF05

Claims (4)

[Claims] 1. A plant control computer and a control device, a simulation test server network-connected to the control computer and the control device, and model information which is information necessary for simulating the operation of the plant. A stored plant model database and a plant control method for controlling the operation of a plant, wherein the control computer and the control device access the simulation test server, and the control computer and the control Uploading the control information set in the device to the simulation test server; the simulation test server changes the model information stored in the plant model database and the uploaded control information. Using the request information, a step of simulating the operation of the plant when operating the control computer and the control device according to the request information, and when the plant can be simulated to operate normally The simulation test server uploads and sets the request information to the control computer and the control device, and the plant control method. 2. The plant control method according to claim 1, further comprising a simulation terminal connected to the simulation test server, wherein the request information is uploaded according to an instruction received from an operator by the simulation terminal. A plant control method, wherein the plant control method is generated by modifying the generated control information. 3. A plant control system for controlling the operation of a plant, comprising: a control computer and a control device for the plant; a simulation test server network-connected to the control computer and the control device; A plant model database in which model information that is information necessary for simulating operation is stored, and each of the unit computer and the control device accesses the simulation test server and is set in its own device. Uploading control information to the simulation test server, and setting the control information uploaded from the simulation test server, wherein the simulation test server stores the model information stored in the plant model database. Using the information and the request information that has been changed to the uploaded control information, while simulating the operation of the plant when operating the control computer and the control device according to the request information, A plant control system, wherein the request information is uploaded as control information to the control computer and the control device. 4. The plant control system according to claim 2, further comprising a simulation terminal connected to the simulation test server, wherein the simulation terminal is connected to the simulation test server according to an instruction received from an operator. A plant control system, wherein the request information is generated by modifying the uploaded control information.