JPS59225402A - Automatic control method - Google Patents

Abstract

PURPOSE:To reduce the memory capacity by providing a status representing procedure step of a device to be controlled to a management table and allowing the control program to reference and rewrite the status so as to control the device in terms of time division. CONSTITUTION:Device groups in slave stations are supervised and controlled by a computer system comprising a computer main body and a remote supervising and controlling device (supper) master station system comprising master stations 81-8N. The software 41 consists of one control program 12 corresponding to N- set of the super, N-set of management tables 401-40N and a timing program 17. Programs 131-13m conducts system changeover control or the like and write the control content such as number to the management table 401. The control program 12 searches the management table 401, outputs a selecting signal S via the corresponding super, and also sets the signal to the status in the table. A selection end signal is stored in a memory 16.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention uses a computer installed in a master station to control devices of a plurality of remote slave stations via a remote monitoring and control device (hereinafter referred to as super). The present invention relates to an automatic control method for time.

[Background of the invention]

Systems that monitor and control equipment at substations located far away from supermarkets are widely used as centralized monitoring and control systems for power system substations, substations for electric railways, etc. The role of both power system substations and substations for electric railways is to supply power to loads according to their respective purposes, and information indicating the status of equipment within the substation is concentrated at the control center via the supermarket.
Monitored and controlled. - The number of substations that are centrally monitored and controlled by the control center is generally 10 to 30, but there are 100 to 200 substations in recent large control centers. When controlling equipment at such a large number of substations from a control center, it may be necessary to control equipment at multiple substations almost simultaneously, and in the event of an accident, multiple equipment may need to be controlled in a short period of time. There will be a need to control substation equipment. Moreover, as the number of substations increases, the frequency of such occurrences increases, and manual control by humans from a control center cannot cope with the problem. Therefore, the control function has been realized by computer software, and automatic control by computers has come to be performed. For example, computer software logic is created to perform automatic equipment control, such as regular shutdown operations at substations for electric railways, reclosing accident trip circuit breakers, and power system operations.

FIG. 1 is a diagram showing an example of the structure of a supermarket with this automatic control function, and includes a computer system 3 consisting of a computer main body 5, a display 7 such as a CRT, a payment device 6, etc., and a master station 81 to 8N. A super master station system 4 consisting of the following is provided in the control center 1, slave stations 91 to 9N are provided on the substation group 2 side, and equipment groups 101 to ION are monitored and controlled.

Figure 2 shows the basic procedure for interfacing computer system 3 and super.
When the device position selection signal S is outputted from the device position selection signal S and the signal SC indicating selection completion is outputted from the supermarket that received this, the computer system 3 confirms this and outputs the control signal C instructing the device to be turned off. do. On the super side, when the device control is completed in response to this signal CK, the completion signal C
C is returned to the computer system 3. When the computer system 3 confirms this, it outputs a device selection signal release signal R. The controller actually releases the device using this signal R, and returns the completion to the computer system 3 using the signal RCK, which confirms this and ends one device control operation.

A 70-chart of software within computer system 3 and a conventional logical configuration 11 of that software for carrying out such a procedure is shown in FIGS. 3 and 4. In FIG. 4, m device control programs 131
~13m performs, for example, scheduled shutdown of equipment, recovery control in the event of a failure, system switching control, etc. These programs are implemented by slave station equipment 101 imported from master stations 8~8N.
~It is started from a processing system (not shown) that receives the ION status and manual operation input as input.

On the other hand, the pipe 31 corresponds to each master station 81 to 8N of the supermarket.
f-full 301 to 3ON and control programs 311 to 31N are provided, and these control programs 311 to 31N perform the processing shown in FIG. That is, when some of the device control programs 131 to 13N are started, the number of one device control program, control content (person, cut, etc.), The position address of the target device, etc. are written, and some of the corresponding control programs 311 to 31N are activated 34, and the procedural control of the control programs shown in FIG. 3 is started. The started control program refers to the corresponding management table, checks the position address of the control object, and outputs the device position selection signal S (step Bl in FIG. 3). The device selection at the slave station using this selection signal S is completed, and the completion signal SC is sent to the master station 8.
1 to 8N, it is received by the input program 14 and written to the online data table 16. The control program has soft timers 321 to 32N, respectively, and checks the table 16 at the timing of these timers. When the selection completion signal SC is found in the table 16 (step B2), the control table is again referred to, the control details are checked, and the control signal C is output. Thereafter, the response completion signal CC of the device is similarly confirmed (step B4), and then the device selection release signal hole is output (step B5).
The reception of the response signal RC is confirmed (step B6),
Finish the procedure.

As described above, in the conventional control method, a control program is prepared for each super station, and a configuration is created that can individually respond to the selection control movement of the super station.
By operating each control program in a time-sharing manner, it is possible to control multiple substations simultaneously and automatically. However, according to this conventional configuration, as the number of substations increases, the number of control programs increases correspondingly to the number of substations, and the memory capacity of the processing device 5 (Fig. 1) must be increased. . Furthermore, an increase in the number of programs also means an increase in the load on the computer, which also affects other tasks. In particular, there may be situations that cannot be handled at a large-scale control center.

[Purpose of the invention]

The purpose of the present invention is to solve the problems of the prior art described above,
An object of the present invention is to provide an automatic control method that is not affected by the number of substations, enables simultaneous control of a plurality of substations, and can minimize internal memory capacity of a computer.

[Summary of the invention]

The present invention focuses on the fact that the control programs provided for conventional super machines are almost the same in function, and reduces the memory capacity occupied by the control program and timer by combining them into one. On the other hand, in the management table corresponding to each super, a status is provided that indicates the current stage of the procedure of the equipment controlled by that super, and the control program refers to the status of each management table and rewrites it. , which is characterized by controlling compatible devices in a time-sharing manner.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 5 shows an embodiment of the present invention.

The logical configuration 41 of the software of the present invention, which implements the basic procedure for interfacing the computer system 3 and the supermarkets (Fig. 2.3), consists of one control program 12 (its interface) corresponding to N supermarkets. (The flow of the control procedure is the same as in FIG. 3) and N management tables 40 that store control and management information for each supermarket.
1-4ON and the timing program 17 that determines the operation timing of the control program 12 based on the information in the management table is a feature of the present invention.

Next, the operation of this system will be explained. Program 131
~13m, as in the past, performs control such as periodic shutdown of equipment, recovery control in the event of a failure, and system switching control, etc. When one of these, for example program 131, is started, a program corresponding to the controlled equipment is activated. The number of the program 131, the position address of the device to be controlled, the control details, etc. are written into the management table 401 paired with the master station 81. FIG. 6 shows the structure of the management table 401 (and others as well). At the same time, the control program 12 is activated 34, and the control program 12 searches the management table 401, finds the registered device address, and outputs the selection signal S via the corresponding supermarket. At the same time, the selection signal output completion information is set in the status F3 in the management table, and the selection completion timer τ is also set. Conventionally, the status and wait timer were functions of individual control programs, but in the present invention there is only one control program 12 and one timing program 17, so the progress status of the control procedure for each master station is determined by these functions. This allows information to be managed.

Then, when the selection completion signal 8C is returned from the slave station,
This is stored in the online data memory 16 via the receiving program 14. The timing program 17 is periodically activated by a timer 21, and the wait timer τ is also counted by this timer 21 and reset when τ seconds have elapsed. If the timing program 17 finds the selection completion signal SC on the table 16 before this reset (timeout when τ has elapsed), the management table 40
Selection completion confirmation information is set in the status F6 of No. 1, and the control program 12 is activated by activation 22.

The above is step B1 in FIG. The operation corresponding to B2 is shown in a flowchart as shown in FIG. The following operations are similar, step B3 in FIG. In the part corresponding to B4, the S transmission in the flow of Fig. 7 is changed to the C transmission (on,
Off command), F3 set is replaced with F2 set (control signal output information), SC presence is replaced with CC presence, F6 set is replaced with F5 set (response confirmation information), and in the part corresponding to steps B5 and B6 in Fig. 3, , R
Send (cancellation signal), F3 set to F1 set (selection cancellation signal output information), SC present to R, C present, F6 set to F
If each set is replaced with 4 sets (cancellation confirmation information), the form of the flow will be the same. As a whole, the control procedure shown in FIG. 3 can be executed using one set of the control program 12 and the timing program 17, and a number of management tables equal to the number of supermarkets. In addition, multiple substations,
l) To control multiple master stations simultaneously, register the program number, device address, etc. from the device control program 131 etc. in multiple corresponding management tables, and these controls will be controlled by the operation of the timing program 17. are executed in a time-division manner, allowing for simultaneous control.

FIG. 8 shows another embodiment of the present invention. Until now, the master station and slave station (substation) corresponded to 1=1, but in reality this corresponds to 1:N1 and one It is also possible for a master station to control a plurality of slave stations, and this embodiment mainly shows software logic corresponding to such a case. That is, in FIG. 8, slave stations 9N1 to 9Nk are connected to the master station 8N, and 4 of these are connected to the master station 8N.
Several stations can be controlled simultaneously. In such a case, a number of management tables 4ON1 to 4ON4 that can be controlled simultaneously (four in FIG. 8) are provided corresponding to the master station 8N,
The control program 12 includes a management table 401,
402...4ON1. ...All 4ON4 may be searched.

In both cases of FIG. 5 and FIG. 8, the priority order for each device control program 131 to 13m is set on the management table.
When multiple control requests are issued to the same slave station from m, it is possible to perform control such that the control programs are executed in order from the one with the highest priority. In this case, For example, it is possible to prioritize control such as accident recovery and improve system safety.

〔Effect of the invention〕

FIG. 9 shows an example in which the method of the present invention and the conventional method are compared in terms of the number of program steps.
As shown, the number of steps is constant at approximately 500 steps regardless of the number N of master stations. However, in the conventional method, as shown by straight line B, programs 311 to 31N (Fig. 4) are 35ON.
The number of steps increases in proportion to the number N of master stations. According to the method of the present invention, as the number of stations increases, the memory capacity can be reduced to a large extent.
In a large control center that supports 0 to 200 slave stations, this is extremely effective. In addition, when expanding the supermarket,
The present invention has the advantage that it is only necessary to add a management table, and the amount of work can be reduced to about 115.

[Brief explanation of drawings]

Figure 1 is a system configuration diagram of the supermarket, Figure 2 is a diagram showing the selection control procedure at the interface between the computer and the supermarket, Figure 3 is a flowchart of a computer program that executes the procedure in Figure 2, and Figure 4 is a diagram showing the selection control procedure at the interface between the computer and the supermarket. Figures 5 and 6 are diagrams showing the conventional logical configuration of computer software that implements 70- in Figure 3, and Figures 5 and 6 are diagrams showing the logical configuration when the present invention is implemented in computer software that implements the flow shown in Figure 3. 7 is a flowchart showing a detailed operation of the embodiment of FIG. 5, FIG. 8 is a diagram showing an example of application of the present invention, and FIG. The figure is a diagram comparing computer memory capacity when using the method of the present invention and the conventional method. 3... Computer system, 81-8N... Master station, 91
~9N...Slave station, 101~ION...Device, 12.
...Control program, 17...Timing program, 131.13m...Device control program,
401~4ON...Management table, )i'1-F6・
...Stitus. Agent: Patent Attorney Masami Akimoto 1st ¥2nd Sτ

Claims (1)

[Claims] 1. In an automatic control method for a system in which a computer system automatically controls slave station devices connected via a master station, an identification code of a slave station device to be controlled and control A management table provided for the slave station device to store at least a status indicating the content and progress status of a predetermined control procedure between the computer system and the slave station device, and a control procedure corresponding to the status. A control program that has the function of sending commands to the slave station above and writing the sent command to the status above, and checking the completion of the response of the slave station in response to the sending of the command. When the completion of the response is confirmed, the computer system is provided with one timing program that has a function of writing the fact to the status, and the control program and the timing program control the plurality of management tables. By operating alternately while searching, the status of each management table is sequentially rewritten as the control procedure progresses, and one or more slave station devices are simultaneously controlled in a time-division manner.
An automatic control method characterized by: 2. When multiple control requests occur to the same slave station device, a priority order corresponding to the multiple control requests is set in advance, and the control contents with this priority order assigned to each control request are stored on the management table. 2. The automatic control method according to claim 1, wherein the control program executes the control contents having the highest priority first.