KR100343564B1 - A simulator for real time or unreal time of power plant - Google Patents

Abstract

PURPOSE: A real-time/non-realtime simulator of generation equipment is provided to reduce a manufacturing cost by performing a control system function by a control model formed with software. CONSTITUTION: A simulation server(10) is used for opening or closing a mechanical model variable database, a control model variable database and exchanging mechanical model variable data for control model variable data. A simulation synchronization server(20) is used for managing frame numbers. A mechanical model generator(30) is used for forming a mechanical simulation model. A mechanical model compiler(31) is used for compiling the mechanical simulation model. A mechanical model variable database(32) is used for storing variables of the mechanical mode. A control model generator(40) is used for forming a control simulation model. A control model compiler(41) is used for compiling the control simulation model. A control model variable database(42) is used for storing variables of the control simulation mode. A simulation synchronization table(61) is formed on a sharing memory by the simulation server(10). A mechanical model variable sharing memory database(62) and a control model variable sharing memory database(63) are used for loading corresponding variable data on a shared memory or storing the corresponding variable data. A chart viewer(50) is used for displaying calculated results of variables to a user.

Description

A simulator for real time or unreal time of power plant

The present invention relates to a simulation system of a power plant, and in particular, by real-time / ratio of the power plant that can reduce the simulation time by allowing the operator to configure the control model directly by software to perform the control system function. It is about a real time simulator.

The simulation of the existing power generation facility is performed by using the commercial distributed control system (DCS) (1) and the power generation machine model (2) as shown in FIG. 1 using a communication table (3) which defines the variable connection relationship between the machine and the control model. Various variables were retrieved from the shared memory 4 into the shared memory database 5. In such a system, it is difficult to develop and use a control module suitable for a site situation because a commercial distributed control system is implemented with hardware set in a constant state. It was possible to simulate in non-real-time and had a disadvantage in that it takes a lot of time to work.

Accordingly, an object of the present invention is to solve the above-mentioned drawbacks, and to reduce the simulation time by improving the simulation time by allowing the operator to directly configure the control model to perform the control system functions. It is to provide real-time / non-real-time simulator of deadline power generation equipment.

1 is a block diagram showing a simulator of a conventional power plant;

Figure 2 is a block diagram showing the configuration of a real-time / non-real-time simulator of the power plant according to the present invention.

3 is a synchronization table structure diagram for real-time / non-real-time simulation of the power plant according to the present invention.

4 is a diagram showing a simulation resource execution sequence for real-time / non-real-time simulation implemented in the present invention.

* Code descriptions for the main parts of the drawings

10: simulation server 20: simulation synchronization server

30: machine model generator 31: machine model compiler

32: machine model variable database 40: control model generator

41: control model compiler 42: control model variable database

50: chart viewer 60: shared memory

61: simulation synchronization table

62: machine model variable shared memory database

63: control model variable shared memory database

The real-time / non-real-time simulator of the power generation facility according to the present invention for achieving the above object, in the simulation system of the power generation facility, opening or closing the machine model variable shared memory database, control model variable shared memory database at the request of the client A simulation server for exchanging machine model variable data and control model variable data; A simulation synchronization server for managing frame numbers while always monitoring server commands in the synchronization table; A machine model generator for creating a machine simulation model of a power generation facility using graphic icons; A machine model compiler that compiles a graphical machine model made by the machine model generator, performs machine model calculation, and generates machine model variables to be used for simulation; A machine model variable database for storing the variables of the machine model generated when the machine model compiler compiles the machine model; A control model generator for generating a control simulation model of a power generation facility using graphic icons; A control model compiler which compiles the graphic control model produced by the control model generator to perform control model calculation and generates control model variables to be used in the simulation; A control model variable database for storing the variables of the control model generated by the control model compiler; A simulation synchronization table created on the shared memory by the simulation server to support real-time and non-real-time simulation; A machine model / control model variable shared memory database for loading corresponding variable data from the machine model / control model variable database into the shared memory or storing data on the memory in the variable database according to a client's request; And a chart viewer showing a graph of the variable calculation results of the machine model and the control model to the user.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram showing the configuration of the real-time / non-real-time simulator of the power plant according to the present invention, Figure 3 is a structure diagram of the synchronization table for real-time / non-real-time simulation of the power plant according to the present invention, Figure 4 Table shows the simulation resource execution procedure for real-time / non-real-time simulation.

As shown in FIG. 2, the present invention includes a simulation server 10, a simulation synchronization server 20, a machine model generator 30, a control model generator 40, and a chart viewer 50. At this time, the simulation synchronization server 20, the machine model generator 30, the control model generator 40, and the chart viewer 50 is operated as a client for the simulation server (10). In particular, the simulation server 10 generates the simulation synchronization table 61, the machine model variable shared memory database 62, and the control model variable shared memory database 63 on the shared memory 60 at startup. The machine model variable shared memory database 62, the control model variable shared memory database 63 do not have any data, and the frame number is set to zero. The simulation server 10 also opens or closes the machine model variable shared memory database 62 and the control model variable shared memory database 62 according to the client's request, and exchanges the machine model variable data and the control model variable data. do. The data exchange between the machine model and the control model is carried out as follows and is done in frames 11 and 14.

while (TRUE)

{

if (server command in synchronous table == stop)

break:

if (frame number changed)

{

Previous frame number = current frame number

switch (current frame number)

{

case 11:

Copy the machine model database to control model variables:

break:

case 14:

Copy control model data variables to machine model variables:

default: break:

}

Record the current frame number at the corresponding position in the resource frame table:

}

else

{

Sleep 1/10 of the time allocated for the unit frame:

}

}

The above algorithm is executed after allocating one resource frame table.

The simulation synchronization server 20 is a background processor that is created / deleted by the simulation server 10. The simulation synchronization server 20 manages the frame number, especially while always monitoring the server command of the synchronization table 61. This frame number is repeatedly changed from 0 to 15. When the frame number is changed from 0 to 15 in the real time mode, the actual time becomes 1 second, and the management of the frame number in the simulation synchronization server 20 is implemented by the following algorithm.

while (TRUE)

{

if (server command in synchronous table == stop)

continue:

Increase the frame number by one:

if (frame number == 16) frame number = 0:

Save start time:

while (any one of the entries in the frame number table is not equal to the previous frame number)

{

if (server command in synchronous table == stop)

break:

If there is a terminated process, it fills the table entry with zeros:

Sleep 1/10 of the time allocated for the unit frame:

}

Save end time:

Execution time = end time-start time

if (execution time does not end at boundary of time allocated to unit frame)

Sleep for the rest of the time:

}

The machine model generator 30 creates a machine simulation model of the power generation facility by using the graphic icon. Therefore, the machine model generator 30 has a simulation mode, and shows the machine model graphically in the simulation mode, performs the calculation of the machine model through the machine model compiler 31, which will be described later, and charts the calculation result of a specific module. Display through the viewer 50. The machine model generator 30 performs a machine model calculation as follows.

while (TRUE)

{

if (server command == stop) continue:

if (frame number changed)

{

switch (frame number)

{

case 12:

case 13:

(E) perform the mechanical model calculation:

break:

}

Record the current frame number in its index position in the frame number table:

}

else

{

Sleep 1/10 of the time allocated for the unit frame:

}

}

The control model generator 40 creates a control simulation model of the power generation facility using a graphic icon. And, it defines the variable connection information between the machine model and the control model for sending and receiving simulation data between the machine model and the control model. As such, the control model generator 40 has a simulation mode, and while driving the control model compiler 41 to be described later while showing the graphic control model in the simulation mode, the control model is calculated and at the same time the calculation result of the specific module is displayed in the chart viewer. Display through 50. The control model generator 40 performs control model calculation as follows.

while (TRUE)

{

if (server command == stop) continue:

if (frame number changed)

{

switch (frame number)

{

case 1:

case 2:

case 3:

case 4:

case 5:

case 6:

case 7:

case 8:

case 9:

case 10:

(H) performs machine model calculations:

break:

}

Record the current frame number in its index position in the frame number table:

}

else

{

Sleep 1/10 of the time allocated for the unit frame:

}

}

The machine model compiler 31 compiles the graphic machine model made by the machine model generator 30 and performs machine model calculation. At this time, the machine model variables to be used for the simulation are generated and stored in the machine model variable database 32 which is a recording medium to be described later. In this case, the variables on the shared memory 60 are determined. When the compilation is finished, the simulation server 10 requests the simulation server 10 to load the machine model variable data stored in the machine model variable database 32 onto the machine model variable shared memory database 62.

The control model compiler 41 compiles the graphic control model made by the control model generator 40 to perform control model calculation, generates control model variables to be used in the simulation, and stores them in the control model variable database 42 to be described later. do. At this time, each variable is determined an address on the corresponding shared memory 60. When the compilation is completed, the simulation server 10 is requested to read the control model variable data stored in the control model variable database 42 onto the control model variable shared memory database 63. Then, the connection information with the control model variable defined by the control model generator 40 is stored in a file for use by the simulation server 10.

The machine model variable database 32 stores the variables of the machine model generated when the machine model compiler 31 compiles the machine model in a file. The control model variable database 42 also stores the variables of the control model generated by the control model compiler 41.

The simulation synchronization table 61 is generated / deleted by the simulation server 10 and managed by the simulation synchronization server 20. In order to support real-time and non-real-time simulation, the simulation server 10 creates a synchronization table 61 as shown in FIG. 3 on the shared memory 60. This synchronization table 61 is composed of a resource processor table and a resource frame table. In the resource process table, the client processor number currently connected to the simulation server 10 is recorded. When the client requests resource frame allocation from the simulation server 10, the server registers the process number of the client in the first space having a value of zero in the resource process table and returns the index value. At this time, if the table is full, -1 is returned. On the other hand, in the resource frame table, the client registered in the resource process table reads and writes its frame number at the index value position of the resource frame table.

In addition, the calculation order of the mechanical model and the control model and the display of the calculation results must be synchronized because their outputs must be alternately made. Therefore, the resources to be executed for this order is defined as shown in FIG.

The machine model variable shared memory database 62 and the control model variable shared memory database 63 are created or destroyed on the shared memory 60 by the simulation server 10, respectively. 32) and load the variable data from the control model variable database 42 into the shared memory 60 or store the data on the memory 60 in the variable databases 32,42.

The chart viewer 50 is a display means for displaying a machine / control variable designated by the user in the frame 15 of the synchronization server 20 in a graph. After the frame is allocated from the resource frame table, the contents of the synchronization table are always monitored. For example, if the frame number changes to 15, the chart viewer 50 displays the variable value selected by the recipient in the machine / control variable table on the shared memory 60. Once the frame number has been changed, the current frame number is recorded at its table position in the frame table shown in FIG. On the other hand, if the frame number is not changed, execution of the program is stopped by 1/10 of the time allotted per unit frame. These processes are repeated repeatedly until the simulation server 10 issues a stop command.

Hereinafter, the operation of the present invention will be described in detail.

The machine model generator 30 creates a machine simulation model of the power generation facility by using the graphic icon and sends it to the machine model compiler 31. Then, the machine model compiler 31 compiles the graphical machine model made by the machine model generator 30 to perform machine model calculation, and generates machine model variables to be used in the simulation to a file in the machine model variable database 32. Save it.

On the other hand, the control model generator 40 creates a control simulation model of the power generation equipment using a graphic icon and sends it to the control model compiler 41. Then, the control model compiler 41 compiles the graphic control model created by the control model generator 40 to perform control model calculation, and generates control model variables to be used for the simulation. Variables of the control model generated by the control model compiler 41 are sent to the control model variable database 42 and stored.

According to the client's request, the variable data is loaded from the machine model / control model variable databases 32 and 42 into the machine model / control model variable shared memory databases 62 and 63 of the shared memory 60, respectively. 50) shows the result of the variable calculation of the machine model and control model graphically to the user. At this time, the synchronization is matched according to the resource order defined in the synchronization table, and the calculation order and output of the calculation result of the machine model and the control model are alternately displayed through the chart viewer 50.

As described above, the real-time / non-real-time simulator of the power generation equipment of the present invention allows the operator to configure the control model directly by software to perform the control system function, thereby making it possible to reduce the manufacturing cost required when constructing the commercial control system in hardware. It is effective to reduce production costs by eliminating the upward factors. In particular, the present invention has the advantage that the simulation can be performed in real time as well as non-real time to improve the efficiency of the simulation by reducing the simulation time. In addition, since real-time simulation is possible, there is an advantage that can be used for training to train the power plant operators.

Claims (5)

In the simulation system of the power generation equipment, A simulation server which opens or closes the machine model variable shared memory database and the control model variable shared memory database according to a client's request, and exchanges the machine model variable data and the control model variable data; A simulation synchronization server for managing frame numbers while always monitoring server commands in the synchronization table; A machine model generator for creating a machine simulation model of a power generation facility using graphic icons; A machine model compiler that compiles a graphical machine model made by the machine model generator, performs machine model calculation, and generates machine model variables to be used for simulation; A machine model variable database for storing the variables of the machine model generated when the machine model compiler compiles the machine model; A control model generator for generating a control simulation model of a power generation facility using graphic icons; A control model compiler which compiles the graphic control model produced by the control model generator to perform control model calculation and generates control model variables to be used in the simulation; A control model variable database for storing the variables of the control model generated by the control model compiler; A simulation synchronization table created on the shared memory by the simulation server to support real-time and non-real-time simulation; A machine model / control model variable shared memory database for loading corresponding variable data from the machine model / control model variable database into the shared memory or storing data on the memory in the variable database according to a client's request; And Real-time / non-real-time simulator of power generation equipment, including a chart viewer that shows the user graphically the results of calculating the variables of the machine and control models. 2. The resource synchronization table of claim 1, wherein the simulation synchronization table comprises: a resource process table in which a client process number currently connected to a simulation server is recorded, and a client registered in the resource process table reads and writes its frame number at an index value position; Real-time / non-real-time simulator of the power plant, characterized in that consisting of. The method according to claim 1 or 2, wherein the simulation synchronization table defines a sequence of resources to be executed in order to synchronize the progress of the calculation order and the output of the calculation result of the machine model and the control model with each other. Real-time / non-real-time simulator of power generation equipment. 2. The real-time / non-real-time simulator of a power plant as claimed in claim 1, wherein the simulation synchronization table and the machine model / control model variable shared memory database are created or destroyed on the shared memory by the simulation server. 2. The real-time / non-real-time simulator of a power plant according to claim 1, wherein the control model generator defines variable connection information between a machine model and a control model for exchanging simulation data between the machine model and the control model. .

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