JPH02119496A - Information input system in power system monitor system - Google Patents

Abstract

PURPOSE:To prevent an overload of a CPU by extending a period time of constant period input processing when the information quantity handled by an arithmetic processing unit exceeds a prescribed value. CONSTITUTION:A load management means 223 counts the input state quantity of the CPU 2 in the production of state change information of broad band multiplex for a prescribed period and when the information quantity exceeds a specified value, a command extending the period time of a constant period input processing is outputted and when the information quantity is decreased, a command returning the period to the normal period is outputted. Then a monitor function of the CPU 2 extends the period of the constant period input processing according to a command of the load management means 223 and restores it to the normal period. Thus, the overload of the CPU 2 is prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an information input method in a power system monitoring system using an electronic computer.

(Prior Art) FIG. 10 shows the configuration of a system for monitoring an electric power system using an electronic computer.

In Fig. 10, 1 is a control desk, 2 is an electronic computer, 3 is a remote monitoring and control device (hereinafter referred to as TC) master station, and 4 is a TC.
Slave station, 5 is a group of devices to be monitored, 6 is an alarm output device, 7 is a CR1 display device, 11 is a button for selecting monitored devices such as a breaker or generator, 12 is a device selected by the selection button 11 21 is the control button for the control pile of the electronic computer (
For example, a process input/output device), 22 is an arithmetic processing unit (hereinafter referred to as CPU), and 23 is a TC interface (for example, a DI4A [direct memory access] device).

The monitoring function 221 of the computer 2 is implemented by the TC slave station 4 and the TC master station 3. Information on the monitored target device 5 is input via the TC interface 23.

The outline of the processing is as follows. First, the information input process of the CPU 22 is roughly divided into periodic information input process and shape R change information input process. be taken in.

When the information content is determined to be abnormal by the information analysis process, the V-beating power is notified to the failure output function 222, and
The contents of the accident or failure of the equipment to be monitored are displayed on the CR7 display device 7.

The operator understands the details of the accident or failure from the CRT display and performs recovery operations to restore the abnormal condition to normal.

(Problem to be solved by the invention) The increase in the amount of information on monitored equipment due to the expansion of the electric power system and the improvement of the functions of monitoring contents will lead to an increase in the periodic input processing of electronic computers, and the - This results in an increase in load, and other processing is processed using the computer's ability minus this base load.

For this reason, the CPU of an electronic computer, which relies heavily on periodic input processing, has the ability to process multiple state changes that occur due to multiple accidents that are expected to occur during wide-area natural disasters such as typhoons or earthquakes. The sum of the base loads exceeds the computational power, and a situation may arise in which input processing of state change information due to an accident or failure, or processing of accident recovery operations cannot be performed promptly.

The present invention has been made in order to solve the above problems, and it is possible to extend the cycle time of periodic input processing when the load (the number of state changes) of the CPU within a certain period of time exceeds a set value. This reduces the CPII load to 1V! To provide an information input method for an electric power system monitoring system that reduces the number of errors and prevents CPU overload, prioritizes input processing of status change information due to accidents or failures, and speeds up accident recovery measures. The purpose is

[Structure of the Invention] (Means for Solving the Problems) The present invention provides means for measuring the amount of information handled by the CPU F and managing the load on the CP II when multiple state change information occurs due to a wide area multiplex accident or failure. The CPυ base load is distributed by means of and means for varying the cycle time of periodic information input processing in the monitoring function, and the state change information input processing and recovery operation processing are appropriately executed.

(Function) When wide area multiplexing status change information occurs, the load management means is CPI.
The amount of input information of I is counted for a certain period of time, and if the amount of information exceeds the specified value, it outputs a command to lengthen the cycle time of fixed-cycle input processing, and if the amount of information decreases, it outputs a command to return to the normal cycle. .

The CPII monitoring function lengthens the cycle of fixed-cycle input processing or returns it to a normal cycle in accordance with commands from the load management means. As a result, overloading of CPII can be prevented.

(Example) Examples will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment for explaining an information input method in a power system monitoring system according to the present invention. In addition, in all the drawings, parts having the same function are indicated by the same reference numerals. In FIG. 1, a load management means 223 is added to the conventional configuration shown in FIG. 10. The other configurations are the same as in FIG. 10.

The explanation will now be made assuming that multiple abnormalities (for example, a large number of circuit breakers are turned off due to the operation of a protective device) occur at various locations in the monitored equipment 5 due to an earthquake disaster. In addition, FIG. 2 shows the CPU operation process I! ! fg diagram, Figure 3 is CPI
It is a processing cycle chart of I.

Multiple state change information occurring at various locations in the monitored device 5 is notified to the TC interface 23 via the TC slave station 4 and the TC master station 3 each time it occurs.

The information on the monitored equipment that the computer 2 inputs can be roughly divided into those that are input periodically (for example, power flow values [HW] of power transmission lines, transformers, etc., power generation values of generators [814],
Changes in the status of monitored equipment due to accidents, failures, etc. (dam water level [1B], etc.) are hereinafter referred to as status changes. ) is input each time a problem occurs (for example, when a circuit breaker is turned on/off).
(such as OFF state change, contact 0N10FF state change of a protective relay device, response monitoring information accompanying an operation command, etc.).

In normal times, as shown in FIG. 3(a), periodic information processing and state change processing are performed within a predetermined period To, and in the case of multiple state changes, periodic The above-mentioned image processing is performed by changing the image processing method. Note that FIG. 3 shows a case where the period is 3To.

FIG. 4 is a flowchart showing TC information input processing. In the input processing of the monitoring function 221, it is determined in step 101 whether the information of the monitored target device is periodic input information or status change information. If it is fixed periodic input information, it is stored in the fixed periodic information file (step 102), and the latest data is always saved. If it is state change information, it is stored in the state change information file at any time (step 103), and a notification is sent to perform state change processing (step 104).

FIG. 5 is a flowchart showing periodic processing. In the fixed cycle processing, a file of fixed cycle information is read every cycle time To (step 111), and converted into data that can be analyzed and edited.
2, 113), and handing over to information analysis/editing processing (step 114).

FIG. 6 is a flowchart showing the state change processing.

In the state change processing, if there is a notification of state change information input, the state change information file is read (step 121).
Data conversion (step 122), detection of the position where the condition occurs (step 123), and counting processing of the amount of condition change information for load management means (step 12).
4) After that, the condition change position information is passed to the condition change analysis/editing process (step 125). In the load management means 223, the status change +! ! The count value of step 124) in figure 6 is read at regular intervals, and the difference from the previous value is taken to monitor the amount of input status change information at regular intervals (described later).

FIG. 7 is a flowchart showing information analysis/editing processing. Here, the input information of the monitored equipment passed from the periodic processing or state change processing is analyzed and online data is created (steps 131 and 132).
>.

Additionally, through this information analysis, if the information indicates an accident or failure (for example, when a breaker changes to the OFF state due to the operation of a protective device or when the power flow value exceeds the allowable value), an abnormality is detected. After editing the contents (Step 134), the alarm output processing (Step 135) notifies the fault output function 222 of the alarm output, outputs the alarm to the alarm output device 6 via the alarm output device interface 24, and informs the operator. At the same time as calling attention to it, the CRT display device controller 25 is driven by the CRT display process to display the details of the accident or failure of the equipment to be monitored on the CRT@water device 7 (step 13G).

The operator reads the entire details of the accident or failure from the CRT and presses the selection button 11 or control button 1 according to the operation flowchart in Figure 8 as a recovery operation to return the abnormal condition to normal.
2 is used to turn off the circuit breaker, increase/decrease the generator output, etc.

Figure 9 shows the load IW! : is a flowchart showing the processing of the embedding means, and a case where the number of condition change information increases rapidly due to this is explained. , 22, the amount of status change information increases rapidly and the explanation will proceed on the assumption that it exceeds the specified value of the load management means. The processes other than the cycle time changing process of the fixed cycle process performed by the load management means are the same as those described above.

The amount of status change information monitored by the load management means is the specified value (CPI
The information analysis described above is calculated by subtracting the base load such as periodic processing from the processing capacity of I.

IP for alarm output, CRT display output, recovery operation, etc.!
: the amount of information that can be properly executed), the load management means issues a command to lengthen the processing cycle time (To) of C P II for fixed period information (step 1).
51-156, 161, 162).

The load on the CPU is reduced by extending the periodic time (TO) of periodic input processing based on commands from the load management means, and processes such as status change processing, CRT display output, and recovery operations are performed quickly (
It will be carried out.

After a certain period of time has elapsed, if the load management means determines that the amount of state-change human power information has increased or decreased below a predetermined value, it issues a command to return the cycle time (To) of the fixed cycle process to the normal cycle.Steps 154 and 163 , 164).

After a certain period of time has elapsed, if the amount of status change human power information continues to exceed the specified value, the load management means continues to extend the cycle time of the regular cycle processing, and if the specified value continues to be exceeded for a long time, the load management means changes the cycle time. (Step 154)
~159).

Note that even when the cycle time of fixed-cycle processing is lengthened, the latest data is always stored in the fixed-cycle information file, so after status change processing, the latest power system information cannot be retrieved using fixed-cycle processing. can be included.

According to the information input method shown in this embodiment, the amount of information handled by the CPU is managed by the load management means, and the amount of information exceeding the specified value is processed at regular intervals to prevent CPUυ overload. It is possible to lengthen the cycle and reduce the cpt+ load.

In addition, even if the content and method of input processing differ from the above explanation due to differences in data transmission methods used in power system monitoring (hereinafter referred to as "power system monitoring"), information input methods that include load management means to prevent CPU overloads may be used. Accordingly, it is possible to properly perform the input processing of accident or failure information, which is the object of the present invention, and to improve the speed of the recovery processing.

[Effects of the Invention] As explained above, according to the present invention, when wide area multiplexed state change information is generated in power system monitoring, the computer's C
By preventing Pυ overload, it is possible to speed up the input and analysis of fault information, thereby increasing the promptness of the operator's fault recovery planning and recovery operations.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is an example of the CPU monitoring function and operation processing flow with load management means added, and Fig. 3 is a diagram showing the CPU [1 processing cycle] when changing the cycle. An example chart, Figure 4 is an example of the TC information input processing flow, Figure 5
The figure shows an example of a periodic processing flow, and Figure 6 shows an example of a state change processing flow.
Figure 7 is an example of the information analysis/prefecture process flow, Figure 8 is an example of the operation process flow, Figure 9 is an example of the load management means process flow, and
FIG. 0 is a diagram showing an example of a conventional system configuration. 1...Control desk 2...Electronic computer 3...
・TC master station 4...TC slave station 5...Monitored equipment group 6...Alarm output device 7...CRT
Display device 22...Arithmetic processing device 23...TC
Interface 24...Interface 25...Controller 221...Monitoring function 223...Load management means Fig. 1r Fig. 3 Fig. 10

Claims (1)

[Claims] In power system monitoring systems using electronic computers,
The load management means measures the amount of information handled by the arithmetic processing device as the information processing means, and when the amount of information exceeds a predetermined value, the periodic input processing is performed by the means for varying the cycle time of the information input processing. An information input method in a power system monitoring system characterized by extending the cycle time of.