JP5725974B2 - Power distribution monitoring control system - Google Patents

Description

  The present invention relates to a power distribution / monitoring control system that efficiently designs a PLC (Programmable Logic Controller) application that transmits information on power distribution / distribution equipment to a monitoring PC (monitoring personal computer) and monitors and controls the equipment.

In a conventional design method for a power reception and distribution monitoring control system, a signal allocation table describing an input / output signal to be monitored, a PC application, and a PLC (Programmable Logic Controller) application are manufactured manually.
As a method that does not depend on manual work, Patent Documents 1 and 2 describe what automatically generates a program.

Japanese Patent Laid-Open No. 10-49207 (pages 3 to 4, FIG. 1) JP 2007-102359 A (pages 7 to 13, FIG. 1)

The conventional design method for power distribution and monitoring system has the following problems.
In other words, since the specifications differ from system to system, program production was a manual operation. Therefore, extra design costs, production costs, and test costs have occurred.
On the other hand, in the methods of automatically generating the programs described in Patent Documents 1 and 2, the scale of the automatically generated program itself may become large and may be complicated, so that it may be difficult to maintain.

  The present invention has been made to solve the above-described problem, and an object thereof is to provide a power distribution and monitoring system that can efficiently produce a PLC application even if the specifications are different for each system in which the PLC is arranged. And

In, a monitoring PC that sends a plurality of PLC that monitors and controls the power distribution facility, and a system parameter that defines the input and output signals of the power distribution equipment PLC, each PLC power distribution monitoring and control system according to the present invention, has a common are common programs in standardization and immobilized Rutotomoni plurality of PLC, the common program group based on the system parameters transmitted from the monitoring PC, execution parameters with the storage address of the input and output signals A predetermined part of the common program group of the PLC is driven by an execution parameter generated by the system setting program.

As the invention has been described above, a monitoring PC that sends a plurality of PLC that monitors and controls the power distribution facility, and a system parameter that defines the input and output signals of the power distribution equipment PLC, each PLC, standardization and has a common are common programs in Rutotomoni multiple PLC immobilized, common program group based on the system parameters transmitted from the monitoring PC, generates an execution parameter with the storage address of the input and output signals Since a predetermined part of the PLC common program group is driven by the execution parameters generated by the system setting program, it is possible to reduce the human intervention in the production of the PLC application. Improvement can be expected.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the power distribution / monitoring control system by Embodiment 1 of this invention. It is a figure which shows the synchronization method of the system parameter of the power distribution / monitoring control system by Embodiment 2 of this invention. It is a figure which shows the dependence relationship of the time stamp of the power transmission / reception monitoring control system by Embodiment 2 of this invention. It is a figure which shows the design method of the power distribution monitoring control system by Embodiment 3 of this invention. It is a figure which shows the design method of the power distribution monitoring control system by Embodiment 4 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
However, as long as there is no relative description about the equipment, communication system, dimensions, material, shape, etc. of the component parts described in this embodiment, the scope of the present invention is not limited thereto, but only It is just an example.
Here, the power transmission / reception monitoring and control system transmits information on power receiving / distributing equipment (information on electronic device status, protection information, measurement values, etc.) to the monitoring PC via the transmission network, and monitors and controls the equipment. It is a system that performs.

The present invention establishes an efficient design and production method by applying an automatic parameter conversion tool and fixing a program in a PLC application.
For this reason, all PLC application programs are standardized and fixed in advance, and used as a common program group in each PLC. This common program group has a data area for storing data (input / output signals) from the power distribution facility.
In addition, necessary signal information is extracted from a table (signal allocation table) describing input / output signals to be monitored using an automatic conversion tool, and parameterized. A parameter group obtained by converting a signal allocation table that is different for each system into a format that can be read by the PLC is defined as a system parameter. That is, the system parameter defines input / output signals and is converted into a format that can be read by the PLC.
Further, the common program group and system parameters are transferred from the PC application to the PLC application.
Further, the common program group of the PLC application creates an execution parameter having a data storage destination address of the connected device from the received system parameter, and is automatically driven by this execution parameter.
Hereinafter, these will be described sequentially.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing a power distribution and monitoring system according to Embodiment 1 of the present invention, and shows a program configuration of Embodiment 1. In FIG.
In FIG. 1, an electronic device such as the protective relay 7 transfers information on the power distribution facility 8 to the PLC application 1. The PC application 6 constantly monitors information on the power distribution facility 8 stored in the link device 12 of the PLC application 1 and saves and displays it on the PC. As a result, the PC application 6 can execute an original operation as a monitoring PC.

  The PC application 6 has a link device data table 61. The link device data table 61 is a data table that constantly monitors and reads and writes the link device 12 of the PLC application 1 described later.

The PLC application 1 has the following.
An execution parameter 13 and a fixed common program group (link transfer program 14 and field network program 16) that are automatically driven by the execution parameter 13 are included.
The link device 12 is a device memory written by the link transfer program 14. The execution parameter 13 is a data storage destination address of the connected device, which is generated from the system parameters of FIG. 2 to be described later, and is calculated based on the code, transmission channel, and station number information of the connected device included in the system parameters. Also, it has information on which part of the common program group is used in the PLC.

The link transfer program 14 is a program having a function of creating link data, writing to the link device 12, and transferring the link device 12, and is one of the common program groups. The link transfer program 14 is provided with the necessary functions to the maximum extent (can handle all connected device codes, transmission channels, and station number information), and only the necessary functions are executed according to the execution parameter 13 (I). / O contact signal, field network signal).
The field network data table 15 is a table for storing data collected by the field network program 16. The field network program 16 is a program having a function of executing field network transmission activation, analog data collection of the protective relay 7, and field network transmission abnormality detection, and is one of the common program groups.

  The protective relay 7 refers to a relay or the like that collects and controls analog data, failure data, and the like of the power distribution facility 8. The power distribution facility 8 refers to a facility group that converts received power into a voltage suitable for the load facility and protects the load facility in the event of an accident.

Next, the operation will be described.
The protection relay 7 in FIG. 1 collects analog data, failure data, and the like of the power receiving / distributing equipment 8 and transfers the collected data to the field network program 16. The field network program 16 collects data from the protective relay 7 and stores it in the field network data table 15.
The link transfer program 14 refers to the execution parameter 13 and creates data for the link device 12. The link transfer program 14 which is one of the common program groups is driven only by a necessary program according to the execution parameter 13.
The link device data table 61 reads the data of the link device 12. As described above, the common program group of the PLC application 1 is always driven by the execution parameter 13.

In the first embodiment, the execution parameter 13 is a data storage destination address of the connected device calculated based on the code, transmission channel, and station number information of the connected device included in the system parameter. The link transfer program 14 has the necessary functions to the maximum extent (can handle all possible connection device codes, transmission channels, and station number information), and the necessary functions according to the execution parameters 13 (actual connection) Only the processing of the device being performed) is executed.
The present invention, by changing the system parameters can be fabricated PLC application 1 of different systems.

According to the first embodiment, since the production of the common program group in the PLC application does not involve human intervention, quality improvement can be expected. In other words, by performing dynamic tests of common programs at the time of development (program quality fixation), after operation, only static tests (confirmation of signal allocation table) can be performed. Reduction and system quality improvement can be realized.
Here, the dynamic test means an automatic conversion tool, system parameter data synchronization processing, and an operation test of a common program group. The static test means a confirmation test of the signal allocation table itself.

Embodiment 2. FIG.
Hereinafter, a system parameter synchronization method of the power reception and distribution monitoring control system according to the second embodiment of the present invention will be described.
FIG. 2 is a diagram showing a system parameter synchronization method of the power reception and distribution monitoring control system according to the second embodiment of the present invention.
In FIG. 2, reference numerals 1, 6, and 13 are the same as those in FIG.
The PC application 6 has the following.
The system parameter data table 62 stores changed system parameters. The setting executable state 63 is a flag that is controlled by the PC application 6 and is enabled when a system parameter is transmitted to the PLC application and a notification that reception has been completed normally is received. The setting execution command 64 is a flag controlled by the PC application 6 and is enabled when the setting execution possible state 63 is enabled, and commands execution of processing for generating an execution parameter from the system parameters.

The PLC application 1 has the following.
The time stamp A23 is a time stamp A that the PC application 6 updates when writing the system parameters. The SUM check code 24 is an error detection code transferred by the PC application 6 when writing system parameters.
The system setting program 27 generates an execution parameter 13 suitable for the PLC application by driving only necessary portions based on the code of the connected device, the transmission channel, and the station number information included in the system parameter 22. The execution parameter 13 is an address indicating the storage location of the data of the connected device calculated by the system setting program 27. The time stamp B28 is updated by copying the time stamp A23 when the PLC application 1 generates an execution parameter.

FIG. 3 is a diagram showing a time stamp dependency relationship of the power distribution monitoring control system according to the second embodiment of the present invention.
FIG. 3 shows the dependency relationship between the time stamp A23 and the time stamp B28.
The time stamp data area is prepared for both the PC application 6 and the PLC application 1. However, in the PC application 6, the time stamp A 23 is only written and the time stamp B 28 is read only.

Next, the operation will be described.
In the second embodiment, when the system parameter 22 is changed by the PC application 6, the PLC application 1 generates an execution parameter suitable for the PLC application based on the system parameter 22. This generation process is executed when a new system parameter is written by the PC application 6 or when the system parameter is changed.
Next, the operation related to the synchronization method between the PC application 6 and the PLC application 1 of the system parameters will be described with reference to FIG.

First, the operation of the PC application 6 will be described.
-At PC startup / communication error recovery The PC application 6 compares the time stamp B28 of the PLC application 1 with the time stamp B28 of the latest data on the PC application side. The contents of the data table 62 are written into the PLC application 1.
・ Setting change command ON
When the PC application 6 receives the signal indicating the completion of normal data reception from the PLC application 1 after writing the system parameter 22, the time stamp A 23 and the SUM check code 24 to the PLC application 1, the PC application 6 sets the flag indicating the setting executable state 63. The setting execution command 64 is enabled.

Next, the operation of the PLC application 1 will be described.
-At PLC startup The common program group normally uses the saved execution parameter 13 as it is. The system setting program 27 compares the time stamp A23 and the time stamp B28 stored in the PLC application 1 when the PLC is started up. If they are different, the writing of the system parameter 22 from the PC application 6 is completed (= SUM check is normal). Until the previous execution parameters. When reception of the system parameter 22 is completed, a normal data reception completion notification is transmitted to the PC application 6.
-When a setting change command is received When the common program group receives an ON signal (a signal indicating validity) of the setting execution command 64, it executes only the necessary part of the system setting program 27 and executes the execution parameters suitable for the PLC application 1. 13 is generated. At that time, the time stamp A23 is copied to the time stamp B28, and used for the next system parameter 22 writing verification.

According to the second embodiment, when the system parameter data table 62 of the PC application 6 is changed, the system parameter 22 is automatically transferred to the PLC application 1 and the PLC application 1 is driven.
In addition, the system can be changed even during driving.
Further, the reliability of the system parameters can be ensured by using the time stamps comparison and check SUMs as the system change method.
Furthermore, the operation with the new execution parameter can be ensured only when the PC application setting execution command is validated after receiving the normal reception of the PLC data, thereby ensuring the reliability of the system parameter.

Embodiment 3 FIG.
Hereinafter, a design method for the power distribution and monitoring system according to the third embodiment of the present invention will be described.
FIG. 4 is a diagram showing a design method for a power reception and distribution monitoring control system according to Embodiment 3 of the present invention.
In FIG. 4, a signal assignment table 81 of the design work computer 80 describes the input / output signals to be monitored. The automatic conversion tool 82 has a function of mutually converting a signal allocation table 81 and a system parameter database 83 that are different for each system. The system parameter database 83 is a database that stores system parameters for executing a fixed common program group.

The PC application 6 of the monitoring PC 60 is produced by the user based on the signal allocation table 81. The system parameter database 66 is a copy of the system parameter database 83. Data table for the system parameter 62 is a table storing system parameters for transferring system parameter database 66 to PLC 10.
The execution parameter 13 of the PLC 10 is generated from the system parameter data table 62 as described in the second embodiment. The common program group 11 of the PLC 10 is standardized and fixed.
The equipment facility 70 is controlled by the PLC 10.

Next, the operation will be described.
The third embodiment relates to the creation of the PC application 6 and the system parameter data table 62.
The user manufactures the signal allocation table 81 of FIG. 4 in which input / output signals in the power distribution monitoring system are collected, and inputs the signal allocation table 81 to the automatic conversion tool 82. The automatic conversion tool 82 generates a system parameter database 83.
The automatic conversion tool 82 is a tool for mutual conversion of a signal allocation table 81 that collects input / output signals in the power distribution monitoring system into a heterogeneous format file.
Further, the user creates the PC application 6 based on the signal allocation table 81. The user transfers the PC application 6 and the system parameter database 66 to the monitoring PC 60.

  The PC application 6 automatically takes in the system parameter data table 62 from the system parameter database 66 and transfers it to the PLC 10 as described in the second embodiment. The PLC 10 generates the execution parameter 13 as described in the second embodiment. Once the execution parameter 13 is generated, the common program group 11 (PLC application 1) is driven by the execution parameter 13 thereafter.

According to the third embodiment, it is possible to produce PLC applications of different systems by changing execution parameters.
Therefore, the production of the PLC program can be expected to improve quality because it does not involve human intervention.
In other words, by performing dynamic tests of common programs at the time of development (program quality fixation), after operation, only static tests (confirmation of signal allocation table) can be performed. Reduction and system quality improvement can be realized.

Embodiment 4 FIG.
Hereinafter, a design method for a power reception and distribution monitoring control system according to Embodiment 4 of the present invention will be described.
FIG. 5 is a diagram showing a design method for a power reception and distribution monitoring control system according to Embodiment 4 of the present invention.
In FIG. 5, 6, 10, 11, 13, 60, 62, 66, 70, 80 to 83 are the same as those in FIG.
The fourth embodiment assumes the time of system remodeling work and renewal work.
Further, the configuration of the fourth embodiment is the same as the configuration of the third embodiment.

Next, the operation will be described.
The user inputs (a) the system parameter database 83 sucked from the monitoring PC 60 to the automatic conversion tool 82 (b). The automatic conversion tool 82 outputs a signal allocation table 81 (c).
The user inputs the signal allocation table 81 to which the modified or updated contents are added or corrected to the automatic conversion tool 82 (d). The automatic conversion tool 82 outputs the system parameter database 83 (e).
Thereafter, the common program group 11 operates by the execution parameter 13 formed by the processes (f), (g), and (h) (the process is the same as that of the third embodiment).

  According to the fourth embodiment, when remodeling work occurs after delivery of the system, the latest signal assignment table can be automatically generated from the system parameter database of the system in operation, so that remodeling or update design becomes easy and test processes are reduced. The system quality can be improved.

1 PLC application 6 PC application 7 Protection relay 8 Power distribution facility 10 PLC (Programmable Logic Controller)
11 Common programs
12 Link device 13 Execution parameter 14 Link transfer program 15 Field network data table 16 Field network program 22 System parameter 23 Time stamp A
24 SUM check 27 System setting program 28 Time stamp B
60 Monitoring PC
61 link device data table 62 system parameter data table 63 sets the executable state 64 setting execution command 66 system parameter database
7 0 Equipment 80 Design work computer 81 Signal assignment table 82 Automatic conversion tool 83 System parameter database

Claims (4)

A plurality of programmable logic controllers (hereinafter referred to as PLCs) for monitoring and controlling power distribution facilities,
And a monitoring personal computer (hereinafter referred to as a monitoring PC) that transmits system parameters defining input / output signals of the power receiving / distributing equipment to the PLC,
Each PLC has a common are common programs in Rutotomoni said plurality of PLC is standardized and fixed,
The common program group includes a system setting program that generates an execution parameter having a storage address for the input / output signal based on the system parameter transmitted from the monitoring PC.
A power distribution monitoring control system , wherein a predetermined portion of the PLC common program group is driven by an execution parameter generated by the system setting program. PLC that monitors and controls power distribution facilities,
A monitoring PC that transmits system parameters defining input / output signals of the power distribution facility to the PLC;
And an automatic conversion tool for automatically converting the signal allocation table describing the input / output signals of the power distribution facility and the system parameters having a format in which the PLC can read the signal allocation table from the signal allocation table. Equipped with a design work computer to create system parameters,
The monitoring PC acquires the system parameters created by the design work computer, transmits the acquired system parameters to the PLC ,
The PLC has a standardized and fixed common program group,
The common program group includes a system setting program that generates an execution parameter having a storage address for the input / output signal based on the system parameter transmitted from the monitoring PC.
It is driven by an execution parameter generated by the system setting program . The design work computer acquires the system parameters from the monitoring PC, converts the acquired system parameters into the signal allocation table by the automatic conversion tool, and the converted signal allocation table is updated by the user. Then, the updated signal allocation table is converted into the system parameters by the automatic conversion tool, and the updated system parameters are created,
The power distribution monitoring control system according to claim 2 , wherein the monitoring PC transmits the updated system parameter to the PLC. When the monitoring PC sends the system parameters to the PLC, it sends a time stamp,
The power distribution monitoring control system according to any one of claims 1 to 3, wherein the PLC updates the time stamp every time the execution parameter is generated.

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