JPH0662472A - Combinational processing system - Google Patents

Abstract

PURPOSE:To shorten the combinational processing time by setting plural stages of timer time limits to the combinational processing from plural state change information and performing the processing from the combination of state change information obtained till then in each stage. CONSTITUTION:A preprocessing computer 4B is provided between a host computer 4A and a remote monitor and control device 3, and respective item data are gathered from the remote monitor and control device 3 in the cyclic system and are subjected to preprocessing. With respect to this preprocessing, the Liner having plural stages of time limits is provided, and the processing is performed from the combination of state changes within the time limit of each stage. The combinational processing for state change information generated within the time limit of the first stage of the timer is performed, and the combinational processing for state change information including those in the preceding stages is performed within the time limit of each of second and following stages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control system for online supervisory control of a target plant such as a power system in combination with a remote supervisory controller, and more particularly to a combination processing system for occurrence of a state change.

[0002]

2. Description of the Related Art A supervisory control system of this type is constructed as shown in FIG. The controlled station device 1 obtains status information and failure information of various facilities / equipment 2 ₁ to 2 _n of the target plant, and cyclically transmits this information to the control station device 4 via the remote monitoring control device 3 as monitoring information. Then, the control station device 4 displays the status and failure information and determines the necessity of the control from the combination of each information, and when the control is required, the controlled station device 1 through the remote monitoring control device as the control information.
Transmitted to the side, for controlling the control target equipment and devices 2 ₁ to 2 _n by the controlled plant apparatus 1.

In the combination processing when a state change occurs in the control station, delay due to cyclic transmission of each information is expected,
The combination processing is performed by accumulating the information by the accumulation timer of about two cycles.

For example, FIG. 5 shows a combination process of a supervisory control system of a substation, in which a combination process is waited for a period T _{C of a} storage timer from a state change occurrence information such as a trip of a circuit breaker (CB), and during this period. If there is state change occurrence information such as the operation of the undervoltage relay (relay), processing is performed in combination with the information.

[0005]

In the conventional combination processing method, an attempt is made to obtain an accurate combination processing by waiting for a time of about two cycles in anticipation of a delay in cyclic transmission. There was a problem of being late.

Although the control station 4 performs the combination processing by the host computer, performing the combination processing for each processing item increases the load on the computer. Therefore, the accumulation timer performs the collective combination processing of the state changes. As the number of combinations increases, the CPU load increases,
Processing is delayed.

It is an object of the present invention to provide a processing method that shortens the combination processing time when a state change occurs and also provides accurate processing.

[0008]

In order to solve the above problems, the present invention collects state change information from a target plant by cyclic transmission and obtains a processing output from a combination of a plurality of state change information. In the second stage of the timer, the timer means is activated by the occurrence of one state change and has a time limit of a plurality of stages, and performs a combination process on the state change information generated within the time limit of the first stage of the timer. The combination processing including the state change information up to the preceding stage is performed within the time period after the eye.

[0009]

With the multi-stage structure of the timer, state change combination processing is performed within the timer time limit of the first stage, and within the timer time limit of the second and subsequent stages, the timer time limits of the first and nth stages are set. The combination processing of the state change is performed, and the combination processing time is shortened as the timer time limit of the former stage is reached, and the correct combination process is obtained as the timer time limit of the latter stage is reached.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a control station device showing an embodiment of the present invention. The control station 4 includes a preprocessing computer 4B between the host computer 4A and the remote monitoring control device 3.
Intervene.

The preprocessing computer 4B collects each item data from the remote monitoring and control device 3 in a cyclic manner,
Pre-processing is performed on the collected data, and the host computer 4A is notified of the result of the pre-processing. Also, the information from the host computer 4A side is pre-processed and a transmission request is made to the remote monitoring control device 3 side.

In the preprocessing by the computer 4B, for example, the host computer 4A is notified of the current operating condition and operating condition obtained from the measurement information and state information of each part of the substation, and conversely a command for changing the operating condition from the host computer 4A side. The remote monitoring control device 3 by obtaining the switching control information of the switch corresponding to the
Request transmission to the side.

Here, the preprocessing computer 4B has a combination processing function when a state change occurs as one of the preprocessing. This pre-processing has a timer having a time limit of a plurality of stages, and the process is performed from a combination of state changes within the time limit of each stage.

This combination process is shown in the time chart of FIG. The timer operates in two stages, T _C1 and T _C2 ,
When activated upon the occurrence of state change 1, the first combination process is performed in the first stage up to time period T _C1, and subsequently the second combination process is performed in the second stage up to time period T _C2. I do.

In the figure, in the first combination process, the combination processes of state changes 1 to 3 are performed, and when this combination is not established, the combination processes of state changes 1 to 4 are performed as the second combination process. These combination processes are not limited to all the state changes within the time limit, and the combination is determined from the state change information and the state information up to that point.

FIG. 3 shows a combination processing flowchart. When the first state change occurs, the first-stage timer 1 is started (step S1), the state change information within the time period T _{C1 of the} timer 1 is accumulated (step S2), and there is a combination for this accumulated information. (For example, a combination of the circuit breaker A and the relay B) is analyzed (step S3), and when there is a combination possible (step S4), whether or not the combination is established (for example, the circuit breaker A is open and the relay B is Closed) is determined (step S
5) When the combination is established, the combination is edited as one processing result (step S6).

When there is no combination in step S4, it is edited as a single state change (step S7).

On the other hand, when the combination is not established in step S5, the second stage timer 2 is started (step S8),
The state change information within the time period T _{C2 of the} timer 2 is accumulated together with the information within the time period of the timer 1 (step S9), and the presence or absence of a combination is analyzed for this accumulated information (step S10),
Whether or not the combination is possible is established (step S11). When the combination is established, the combination is additionally edited (step S6). When the combination is not established, the combination is additionally edited as individual state change information in the time period T _C2 . (Step S
7).

Therefore, according to the present embodiment, the state change occurrence information is divided into two stages of timer time limits, and when a combination is established within the first stage time limit, message processing and control based on the combination are executed. Can perform combination processing in a relatively short time. Further, in the combination process up to the time limit of the second stage, even if the combination is not established within the time limit of the first stage, accurate combination process can be performed by combining with the information within the time limit of the first stage.

In the embodiment, the number of timer stages is three.
It can be more than a step.

[0021]

As described above, according to the present invention, a timer period of a plurality of stages is set in the combination process from a plurality of state change information, and the process is performed from each state change information combination up to that stage. As a result, the combination processing time can be shortened and accurate processing can be performed.

Further, by performing the combination processing by the preprocessing computer, it is possible to reduce the load on the host computer even for the processing in which the number of combinations becomes large.

[Brief description of drawings]

FIG. 1 is a block diagram of a control station showing an embodiment of the present invention.

FIG. 2 is a combination processing time chart of the embodiment.

FIG. 3 is a combination processing flowchart of the embodiment.

FIG. 4 is a block diagram of a supervisory control system.

FIG. 5 is a conventional combination processing time chart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Controlled station apparatus 3 ... Remote monitoring control apparatus 4 ... Control station apparatus 4A ... Host computer 4B ... Preprocessing computer

Claims (1)

[Claims] 1. In a supervisory control system that collects state change information from a target plant by cyclic transmission and obtains a processing output from a combination of a plurality of state change information, a plurality of time periods are activated when one state change occurs. A timer unit having the same, performing combination processing on the state change information generated within the time limit of the first stage of the timer, and including the state change information up to the previous stage within the time limit of the second stage and thereafter of the timer. A combination processing method characterized by performing processing.