JP5215141B2 - Power system monitoring and control system - Google Patents

Description

  The present invention relates to a power system monitoring and control system that monitors and controls switches, switches, relays, and the like constituting a power system from a distance, and that equivalents monitoring data such as the current state of system equipment to a plurality of sites.

As a data equivalence method in the conventional power system monitoring and control system, real-time characteristics such as the current state of the equipment are required, and from the highly important data, the update frequency such as work memo data is low, and relatively Synchronous equivalent processing (hereinafter referred to as double writing processing) based on close data linkage between dual computers is used for various types of data up to less important data.
In the double writing process, the target data is written into the memory / disk of both the own computer and the equivalent computer as the equivalence source. If the equivalence processing to the equivalence destination computer fails, the own computer that becomes the equivalence source is also dragged to it and takes the form of failure determination.
Patent Document 1 is an example of a data equivalence method between computers connected by a network, not a technology limited to a power system monitoring control system. In Patent Document 1, each data is classified into object groups, and an equivalent computer name and a propagation method are assigned to each group. The propagation method is classified into synchronous, semi-synchronous and asynchronous according to the importance of the equivalent data.

JP 2002-014861 (pages 4 to 19, FIG. 2)

The double write processing adopted as the data equivalence method in the conventional power system monitoring and control system is affected by the write failure of the equivalent destination computer to the equivalent source computer, and the equivalent source computer determines the failure. End up. And there existed a possibility of leading to the fall of the operation rate of the whole system. For this reason, it is necessary to adopt an equivalent method that is not affected as much as possible by the failure of the equivalent destination computer.
In addition, although the update frequency of the current status monitoring data of the system equipment with high update frequency to the record table, work memo data, etc. is low, it is equivalent every time many types of data are updated from large size data. It was expensive and was squeezing the communication path. Therefore, it is necessary to reduce the network load by changing the equivalent period of data.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an electric power system monitoring and control system having an equivalent method for improving the operating rate and reducing the network load of the entire system. ing.

In the power system monitoring control system according to the present invention,
A power system monitoring and control system configured by an equivalent source computer and an equivalent destination computer,
Each calculator
A data equivalence method definition table that defines an equivalent method for each classification classified based on data characteristics and data size for data acquired from system equipment and terminals,
A data storage unit for storing data acquired from system devices and terminals,
Based on the classification of the data equivalence method definition table, the double writing processing unit that performs equivalent processing in real time on the data stored in the data storage unit,
Asynchronous double-write processing unit that asynchronously processes the data stored in the data storage unit based on the classification of the data equivalence method definition table,
In addition, based on the classification of the data equivalence method definition table, there is provided a data difference equivalent unit that performs equivalent processing only on the difference between the data stored in the data storage unit and the data stored in the equivalent data storage unit. .

As described above, the present invention is a power system monitoring and control system configured by an equivalent source computer and an equivalent destination computer,
Each calculator
A data equivalence method definition table that defines an equivalent method for each classification classified based on data characteristics and data size for data acquired from system equipment and terminals,
A data storage unit for storing data acquired from system devices and terminals,
Based on the classification of the data equivalence method definition table, the double writing processing unit that performs equivalent processing in real time on the data stored in the data storage unit,
Asynchronous double-write processing unit that asynchronously processes the data stored in the data storage unit based on the classification of the data equivalence method definition table,
In addition, based on the classification of the data equivalence method definition table, the data difference equivalence unit that performs equivalent processing only on the difference between the data saved in the data saving unit and the data saved in the equivalent data saving unit is provided. By adopting an equivalent method in which only high-characteristic data is double-written and other data is not affected by the write failure of the equivalent computer, the overall system availability is improved and the entire system network The load can be reduced.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the invention will be described in detail.
FIG. 1 is a system configuration diagram showing an overview of a power system monitoring control system according to Embodiment 1 of the present invention.
In FIG. 1, the dual system computers 11 and 12 are in close cooperation, and each other can be a primary computer or a secondary computer. In the first embodiment, a main computer 11 and a slave computer 12 are assumed. The dual computers 11 and 12 are connected by a wide area network and are arranged at different bases.

The duplex computers 11 and 12 are connected to a terminal 122 and a system device 123, respectively, and to a local disk having data storage areas 131 and 132.
The dual system computers 11 and 12 are configured as follows.
The input contact 121 captures input information from the terminal 122 and state monitoring data of the local system device 123. The data storage unit 101 stores the input information and state monitoring data acquired from the input contact 121 in the data storage area 131. The double writing processing unit 102 performs double writing processing. The asynchronous double write processing unit 103 performs asynchronous double write processing. The data difference equivalent unit 104 performs constant period difference equivalent. The double writing processing unit 102, the asynchronous double writing processing unit 103, and the data difference equivalent unit 104 execute an equivalence method according to data characteristics. The data communication unit 105 is connected to a wide area network, and communicates with an equivalent computer. The internal buffer 141 stores data for asynchronous double write processing.
A data equivalence method definition table 111 and a timer definition table 112 are stored in the local disks connected to the dual computers 11 and 12.

FIG. 2 is a diagram showing a data equivalence method definition table of the power system monitoring and control system according to Embodiment 1 of the present invention.
In FIG. 2, an equivalent method is defined for each data. Equivalent methods include double writing, asynchronous double writing, and constant period difference equivalence.

FIG. 3 is a diagram showing a timer definition table of the power system monitoring control system according to Embodiment 1 of the present invention.
In FIG. 3, the timer time is shown.

FIG. 4 is a flowchart showing processing of the data storage unit of the power system monitoring control system according to Embodiment 1 of the present invention.
FIG. 5 is a flowchart showing processing of the dual writing processing unit of the power system monitoring control system according to Embodiment 1 of the present invention.

FIG. 6 is a flowchart showing the processing of the asynchronous dual write processing unit of the power system monitoring control system according to Embodiment 1 of the present invention.
FIG. 6A shows the processing of the transmitting computer, and FIG. 6B shows the processing of the receiving computer.
FIG. 7 is a flowchart showing processing of the data difference equivalent unit of the power system monitoring control system according to Embodiment 1 of the present invention.

Next, the operation will be described with reference to FIGS.
Various types of data are input to the input contact 121 in FIG. In the first embodiment, each data is classified into three groups based on characteristics (importance, immediacy, update frequency) and size information. One is a data group that is high in update frequency, importance, and immediacy, and small in size (hereinafter, data group A). One is data with medium update frequency, importance, immediacy, and size (hereinafter, data group B). One is data that is relatively high in update frequency, importance, and immediacy, and that has a large size (hereinafter, data group C).

Next, in FIG. 1, in the dual computers 11 and 12 when the input contact 121 receives data classified into the data group A such as the current device status monitoring data transmitted from the system device 123. The operation will be described.
When receiving the data, the equivalent source input contact 121 passes the received data to the equivalent source data storage unit 101. The data storage unit 101 executes a process ST1 for storing received data in the data storage area 131 of the local disk as shown in FIG. Next, a process ST2 for reading the data equivalence method definition table 111 stored in the local disk is performed. The data equivalence method definition table 111 acquired in ST2 is matched with the received data, and the data equivalence method No. To get.

  For data belonging to the data group A, the dual write processing unit 102 is called in ST4. From FIG. 5, the operation state confirmation process ST11 of the dual computer 12 of the equivalent destination is executed. If double writing is possible, ST12 which is a transmission buffer set process for received data is executed, and data synchronization event transmission process for transmitting data to the equivalent duplex computer 12 via the equivalent data communication unit 105 Execute ST13.

The process returns to the data storage unit 101, and the equivalent data storage unit enters a reply waiting loop in ST5 of FIG. A process ST5 for determining whether or not there is a reply from the equivalent duplex computer 12 within a predetermined time is executed. If there is a reply, the process ends normally. If not, a failure determination process is performed. Become.
In the case of abnormal termination, the equivalent source dual system computer 11 goes down. The equivalence destination dual system computer 12 passes the data transmitted from the equivalence source dual system computer 11 to the equivalence destination data storage unit 101 and stores it in the data storage area 132 of the local disk.

Next, in FIG. 1, the operations in the dual computers 11 and 12 when the input contact 121 receives data classified into the data group B, such as recorded data edited by the terminal 122 at the input contact 121. explain.
The processing of ST1 to ST3 of the equivalent source data storage unit 101 is the same as described above. In ST3, in the case of data of data group B, asynchronous double-write processing is performed as an equivalent method. The data received from the input contact 121 calls the process of the equivalent original data storage unit 101 in FIG. 4, and calls the asynchronous double write processing unit 103 in ST7.

In the flow of the asynchronous double write processing unit 103 in FIG. 6, ST21 fetched into the internal buffer 141 of the own computer 11 of the equivalent source in FIG. 6A is executed. When data is stored in the internal buffer 141, the processing of the data storage unit 101 of the equivalent source ends.
In FIG. 6B, the equivalent destination duplex computer 12 constantly monitors the internal buffer 141 of the equivalent source (ST22), and when arbitrary data enters the internal buffer 141 (ST23), it is extracted. Then, the process ST24 for storing the data in the data storage area 132 of the local disk is executed. Even if an error occurs in the processing on either the sending side or the receiving side, the effect does not affect the partner computer.

Next, in FIG. 1, the operations in the dual computers 11 and 12 when the input contact 121 receives data classified into the data group C such as operation sheet data edited by the terminal 122 at the input contact 121. Will be explained.
The processing of ST1 to ST3 of the data storage unit 101 is the same as described above. In ST3, in the case of data of the data group C, constant period difference equivalence is performed as an equivalent method.
The data difference equivalent unit 104 shown in FIG. 7 is started at the same time when the computer starts up. At the first startup, the data difference equivalent unit 104 executes a process ST31 for reading the timer definition table 112 existing in the own computer and is defined therein. The process ST32 is executed to wait for a predetermined time.
After that, the process is started for each period acquired in ST31, the process ST33 for reading the data equivalence method definition table 111 is executed for each start, and the process ST34 for acquiring the data name list corresponding to the data group C is executed.
For the data name acquired in ST34, a process ST35 for retrieving data corresponding to the name from the local disk is executed. If the target data exists, the hash value calculation process ST36 of the data is executed. Processing ST37 for requesting transmission of the result data of ST36 to the data communication unit 105 is executed. The data communication unit 105 asynchronously transmits the requested data to the equivalent computer.

The received equivalence destination computer automatically calculates the hash value of the target data and performs a comparison operation with the hash value of the equivalence source computer. If the data is the same, no processing is performed. Request the equivalent processing of only the difference data.
The equivalence source computer transmits the requested difference data to the equivalence destination computer, and the equivalence destination computer stores the data received by the data storage unit 101 in the data storage area 132 of the local disk. As described above, data belonging to the data group C is equivalent in a fixed cycle and asynchronously regardless of the data update frequency.

  As described above, according to the first embodiment, the equivalence target data is classified into three groups, only the data belonging to the data group having high data characteristics is equivalent by the double writing process, and the other groups are Since the asynchronous equivalent method or the asynchronous and fixed period equivalent method is used, the failure rate of the entire system can be reduced, and the network load can be reduced.

Embodiment 2. FIG.
FIG. 8 is a system configuration diagram showing an outline of a power system monitoring control system according to Embodiment 2 of the present invention.
In FIG. 8, 11, 12, 101-103, 105, 121-123, 131, 132, 141 are the same as those in FIG. In FIG. 8, a data equivalence method / equivalent cycle definition table 113 in which an equivalent cycle in the case of the equivalence method 3 is defined is provided. The processing of the data difference equivalent unit 106 is different from that of the first embodiment.

FIG. 9 is a diagram showing a data equivalent method / equivalent cycle definition table of the power system monitoring and control system according to the second embodiment of the present invention.
In FIG. 9, an equivalent method for each data is defined, and an equivalent period is defined for data of the equivalent method 3.

  FIG. 10 is a flowchart showing processing of the data difference equivalent unit of the power system monitoring control system according to Embodiment 2 of the present invention.

  In the first embodiment, the data equivalence method for changing the equivalence method of each data has been described by paying attention to the importance and size of the data. However, the second embodiment has the system configuration of FIG. 8 and is shown in FIG. As described above, the equivalent period of the data of the equivalence method 3 is provided with an item to change, and the data for which the equivalence processing is performed in the fixed period is further classified and equivalent. It is possible to perform equivalence corresponding to the network, and the network load can be further reduced.

Next, the fixed period difference equivalent processing of the second embodiment will be described based on the flowchart of FIG.
First, processing ST41 for reading the data equivalence method / equivalent cycle definition table 113 of FIG. 9 is executed. The process ST42 for extracting only the data name of the equivalent method 3 from the read data equivalent method / equivalent cycle definition table 113 information is executed. Thereafter, each data is defined in the data equivalent method / equivalent cycle definition table 113. Equivalent processing is executed every number of seconds. ST44 to ST46, which are equivalent processing parts, are the same processes as ST35 to ST37 of FIG.

  As described above, according to the second embodiment, by adding an item to the definition table so that the equivalent period can be made variable for data adopting the constant period difference equivalent method, useless equivalent processing can be omitted. It is possible to reduce the network load.

Embodiment 3 FIG.
FIG. 11 is a diagram showing a data equivalence method / equivalent period / equivalent destination definition table of the power system monitoring control system according to the third embodiment of the present invention.
In FIG. 11, an equivalent method and an equivalent destination are defined for each data, and an equivalent period is defined for data of the equivalent method 3.

In the first and second embodiments, the case where the equivalent destination computer is fixed has been described. However, the third embodiment also responds to the needs of changing the equivalent destination and equivalence to multiple locations according to the user's operation mode. I was able to do it.
FIG. 11 further adds an equivalent destination item to the data equivalence method / equivalent cycle definition table of FIG. You can specify multiple computer names, storage names, etc. as the equivalence destination. In other words, the third embodiment is an added value mode in which the equivalent destination can be changed and the plural destinations can be equivalent to the second embodiment.

  As described above, according to the third embodiment, since it is possible to cope with switching of data equivalence destinations, an equivalent form that meets the needs of the user can be constructed and can be equivalent to a plurality of locations. This has the effect of improving the reliability of the entire system.

1 is a system configuration diagram showing an overview of a power system monitoring control system according to Embodiment 1 of the present invention. FIG. It is a figure which shows the data equivalent system definition table of the electric power system monitoring control system by Embodiment 1 of this invention. It is a figure which shows the timer definition table of the electric power system monitoring control system by Embodiment 1 of this invention. It is a flowchart which shows the process of the data storage part of the electric power system monitoring control system by Embodiment 1 of this invention. It is a flowchart which shows the process of the double writing process part of the electric power system monitoring control system by Embodiment 1 of this invention. It is a flowchart which shows the process of the asynchronous double writing process part of the electric power system monitoring control system by Embodiment 1 of this invention. It is a flowchart which shows the process of the data difference equivalent part of the electric power system monitoring control system by Embodiment 1 of this invention. It is a system configuration | structure figure which shows the outline | summary of the electric power system monitoring control system by Embodiment 2 of this invention. It is a figure which shows the data equivalent system and equivalent period definition table of the electric power system monitoring control system by Embodiment 2 of this invention. It is a flowchart which shows the process of the data difference equivalent part of the electric power system monitoring control system by Embodiment 2 of this invention. It is a figure which shows the data equivalent system of the electric power system monitoring control system by Embodiment 3 of this invention, an equivalent period, and an equivalent destination definition table.

Explanation of symbols

11 Double computer (main system)
12 Double computer (secondary)
DESCRIPTION OF SYMBOLS 101 Data storage part 102 Double writing process part 103 Asynchronous double writing process part 104 Data difference equivalent part 105 Data communication part 106 Data difference equivalent part 111 Data equivalent system definition table 112 Timer definition table 113 Data equivalent system and equivalent period definition table 121 Input contact 122 Terminal 123 System equipment 131, 132 Data storage area 141 Internal buffer

Claims (4)

A power system monitoring and control system configured by an equivalent source computer and an equivalent destination computer,
Each of the above calculators
A data equivalence method definition table that defines an equivalent method for each classification classified based on data characteristics and data size for data acquired from system equipment and terminals,
A data storage unit for storing data acquired from the system devices and terminals,
Based on the classification of the data equivalence method definition table, a double writing processing unit that performs equivalent processing in real time on the data stored in the data storage unit,
Based on the classification of the data equivalence method definition table, an asynchronous double write processing unit that asynchronously performs equivalent processing on the data stored in the data storage unit,
And a data difference equivalent unit that performs equivalent processing only on the difference between the data stored in the data storage unit and the data stored in the equivalent data storage unit based on the classification of the data equivalence method definition table. A power system monitoring and control system.   The data difference equivalent unit calculates a hash value for the data to be equivalently processed, transmits the hash value to an equivalent destination computer, and the equivalent destination computer that has received the hash value calculates the hash value of the target data of the own computer. The power system monitoring and control system according to claim 1, wherein, if they are different from each other, an equivalent process of only the difference is requested to an equivalence computer.   3. The data equivalence method definition table includes period information for performing equivalence processing, and the data difference equivalent unit performs equivalence processing based on the period information. Power system monitoring and control system.   The data equivalence method definition table includes equivalence destination information for designating an equivalence destination computer, and the equivalence source computer performs equivalence processing based on the equivalence destination information. 4. The power system monitoring control system according to any one of 3.

Images