JP2008118804A - Automatic monitoring method for digital protection relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic monitoring method for a digital protection relay capable of reducing a delay in monitoring, reducing the storage capacity of failure information data and effectively utilizing the data. <P>SOLUTION: In this automatic monitoring method for a digital protection relay, the digital protection relay is monitored, an emergency alarm is outputted when a failure occurs, the emergency alarm output is reset when the failure is eliminated, and the failure information data including several data for each failure event is stored. A monitoring processing module monitors the occurrence of or the recovery from failure for each event, increases or decreases the count value of the failure counter of every mode distinguished by a failure mode when the failure occurs or is eliminated, and determines whether to output the emergency alarm or not by the contents of every failure counter. On the other hand, a separated failure output-display processing module reads out the failure information stored when a failure occurs and displays it. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention monitors the digital protective relay device, outputs an abnormality alarm when the abnormality occurs, returns the abnormality alarm output when the abnormality is restored, and obtains abnormality information data composed of several pieces of data per event of the abnormality. The present invention relates to an automatic monitoring method to be stored, and particularly relates to writing / reading of abnormal information data and an abnormal alarm output / display method.

  Automatic monitoring of a conventional digital protection relay device is realized as a computer resource and software configuration installed in the device. This abnormal item output method by automatic monitoring is expressed as a monitoring code that combines a large group code sorted by monitoring range or monitoring item based on a hardware circuit and individual codes further subdivided by the monitoring method or monitoring part. (For example, refer to Patent Document 1).

  Then, when performing an abnormal alarm output, set a flag or bit corresponding to the monitoring code. After one round of monitoring, if the flag (bit) remains set, the abnormal continuation (abnormal recovery has occurred) Alarm) is output.

  Also, in recording abnormal information data, a method of storing in memory at the time of occurrence / recovery of abnormality corresponding to the monitoring code is adopted (for example, see Patent Document 2). The recorded data such as the abnormality information data is used for abnormality analysis by being executed using an analysis tool such as a maintenance tool.

  FIG. 9 is a conceptual diagram of monitoring processing in which the conventional configuration is the monitoring example (I / O output) monitoring example in FIG. 8, FIG. 10 is a storage information data and area configuration example, and monitoring processing and abnormal information recording processing flow FIG. 11 shows a monitoring abnormality output process and a monitoring abnormality display process flow.

  FIG. 8 equivalently shows the monitoring function of the duplexed I / O output of the AC circuit breaker. Here, 52a indicates that the output of the AC circuit breaker with the control device number 52 is captured at the a contact, and 52b indicates that the output of the AC circuit breaker with the control device number 52 is captured at the b contact.

  It is monitored whether both output signals 52a and 52b coincide with each other to be turned on or off. If this state continues for 10 seconds or more, it is determined that the I / O output is inconsistent or abnormal, and a serious failure has occurred. Monitor output is obtained. As the abnormality information data at this time, for example, a part code memory area 7000, a monitoring method code area 20, and a monitoring part code area 1 are assigned, and a monitoring code “7021” obtained by summing them is assigned.

  In the above monitoring process, as shown in FIG. 9, an abnormality is determined by the monitoring process, and when an abnormality occurs, the abnormality information is set to the bit corresponding to the monitoring code “7021” of the heavy / light failure output area “on”. Let When returning from the occurrence of abnormality, the bit of “7021” is turned “off”. After that, in the abnormal output processing, if the bit in the area for serious fault output is “on”, a major fault is output, and if the bit in the area for minor fault output is “on”, a minor fault is output. . In the abnormality display process, if the bit in the heavy / light failure output area and the display output area matches the display part code data, the abnormality display of the corresponding part is turned on.

  FIG. 10A shows an example of the storage buffer configuration of the stored information data and the contents of the stored information, and FIG. 10B shows an example of the configuration of the heavy / light failure output area and the display output area.

  FIG. 11 shows details of the monitoring process and the abnormality information storage process of FIG. In the abnormality determination process, the output signal 52a / b is checked for coincidence and non-coincidence. When they coincide, the monitoring timer is started, and when the time is over, the corresponding bits of the abnormality display process and abnormality alarm output process are turned on. Display. If they do not match, the abnormal display process and the abnormal alarm output process are displayed with the corresponding bit “off”.

  In the abnormality occurrence storage processing, when an abnormality has occurred in the past when the monitoring system is started up, and this is within a certain time, the abnormality occurrence counter is incremented and the storage pointer is left as the old data pointer. When no abnormality has occurred in the past or when a certain time has elapsed, the abnormality occurrence counter is set to “1” and the storage pointer is incremented. After these processes, storage processing of abnormal information data is performed. In the return storage processing, abnormal data storage processing (recovery) is performed by the same processing as the abnormality occurrence storage processing.

The above processing is for one abnormal event, and each processing is repeated for a large number of abnormality monitoring items as a monitoring function. After this process is completed, an abnormal output process and an abnormal display process are performed as monitoring results. Details of the abnormal output process and the abnormal display process are shown in FIG.
Japanese Patent Application No. 6-3337 Japanese Patent Application No. 9-205784

  As described above, in the conventional monitoring process, the abnormality output process and the abnormality display process are performed after the abnormality monitoring items are completed.

  For this reason, the monitoring abnormality output / display processing is performed after the monitoring processing for a large number of abnormality monitoring items has been completed, and the response to these outputs is delayed.

  As the number of monitoring events increases, a memory area corresponding to the monitoring code assigned to each output area (an area where code bits can be turned on / off) is required.

  In addition, the abnormality information data is stored every time the monitoring process is executed regardless of whether or not an abnormality has occurred, and is read out. Therefore, there is a large amount of data that is not necessary for the analysis of the abnormal part, and its effective use becomes difficult.

  An object of the present invention is to provide an automatic monitoring method for a digital protection relay device that solves the above-described problems.

  The present invention for solving the above-described problems is characterized by the following method and program.

(1) Monitors the digital protective relay, outputs an abnormal alarm when an abnormality occurs, restores the abnormal alarm output when an abnormality is restored, and stores abnormal information data consisting of several data per event of these abnormalities In the automatic monitoring method of the digital protective relay device,
A monitoring processing module and an abnormal output / display processing module separated from the monitoring processing module;
The monitoring processing module monitors the occurrence or return of an abnormality for each abnormal event, increases or decreases the count value of the abnormal counter in each mode distinguished by the abnormal mode at the occurrence or return of an abnormality, and outputs an abnormal output according to the contents of each abnormal counter. A process of determining whether to
The abnormality output / display processing module includes a process of reading out the abnormality information data stored when an abnormality occurs, and a process of performing abnormality display output using the read out abnormality information data. Automatic monitoring method for equipment.

(2) The monitoring processing module and the abnormality output / display processing module treat a storage buffer for abnormality information data as a data transmission / reception interface,
The write pointer and read pointer of abnormal information data to the storage buffer are switched in a ring shape,
Automatic monitoring of a digital protective relay device that saves data in the write pointer area when writing abnormal information and advances the write pointer, and reads data and advances the read pointer when reading abnormal information Method.

  (3) A program characterized in that the automatic monitoring method of the digital protection relay device in (1) or (2) above can be executed by a computer.

  As described above, the present invention has the following effects.

  (1) In the past, monitoring was performed by increasing / decreasing the count value of each mode's abnormal counter that was distinguished by the abnormal mode when an abnormality occurred and returning, and determining whether or not to output an abnormality based on the contents of each abnormal counter. A memory area for code (an area where code bits can be turned on / off) is required, but this is possible with memory for an abnormal counter in each mode.

  (2) In storing abnormal information data, by adding a read processing function only to the writing process, the stored abnormal information data can be used effectively.

  (3) By performing abnormality display using abnormality information data stored in the monitoring abnormality, the monitoring processing module and the abnormality output / display processing module can be divided. This also allows the monitoring abnormality output / display processing module to be activated at any time without having to go through the entire monitoring process. Conversely, the monitoring process can be started without being aware of the monitoring abnormality output / display processing module.

  In this embodiment, the abnormal mode is distinguished depending on when the abnormality occurs and at the time of recovery, the count value of the abnormal counter provided for each abnormal mode is increased or decreased (counting up / counting down), and whether or not an abnormal output is output depending on the contents of each abnormal counter. Judgment is made. In addition, abnormality display is performed using abnormality information data stored when an abnormality occurs.

  FIG. 1 shows a flow of monitoring processing and abnormality information storage processing in the embodiment of the present invention. FIG. 2 shows a configuration diagram of a storage area for storing abnormality information, and FIG. 3 shows a flow of abnormality output and abnormality information display processing. Of these, abnormality display processing uses abnormality information data stored in FIG. 4 and 5 show details of processing for saving (writing) / loading (reading) abnormality information data in the storage area. The abnormal storage process of FIG. 1 and the abnormal output process of FIG. 3 are separated and can be processed by the same task or by different tasks. As a result, it is possible to start the abnormal output and display processing at an arbitrary time without waiting for one cycle of the monitoring processing.

  The monitoring process (FIG. 1) is divided into two blocks. The abnormality determination process that is one of them is a process that omits the abnormality display process and the abnormality alarm output process in FIG. In another information recording process, the memory at the time of abnormality occurrence change and the memory at the time of return condition change are separately processed, and the occurrence and restoration of the abnormality specified in the monitoring code is one-to-one.

  The abnormality occurrence storage process and the return storage process (FIG. 1) are provided with a counter for counting the number of abnormalities. When an abnormality occurs, the occurrence number counter is incremented by 1 (up), and at the time of recovery, the return number counter is decremented by 1 ( The abnormal information data is stored at this time. In the monitoring abnormality output process (FIG. 3), it is determined whether or not to output based on the value of the abnormality output counter. This eliminates the need for an area area (each 1250 bytes) in which the bits of the conventional monitoring code (0 to 9999) can be turned on / off.

  The monitoring abnormality output process (FIG. 3) is also divided into two blocks, an abnormality output process and an abnormality display process. The abnormal output processing that is one of them is performed for each of a major failure and a minor failure. In another abnormality display process, the stored abnormality information data is read, and the abnormality display content is determined from the abnormality information data. For this reason, an item of display information is added to the abnormality information data (FIG. 2).

  Next, as a method for dividing the monitoring processing module and the abnormal output / display processing module, the storage method of the abnormal information data can be read as well as written. 4 and 5 show a flow of abnormal information data writing and reading processing. Conventionally, when “the same abnormality has occurred within a certain period of time in the past”, the block is overwritten. However, in order to separate the processing of FIG. 1 from the processing of FIG. To. Write / read control is executed based on the data in the control area portion of FIG.

  Schematic diagrams of data writing / reading are shown in FIGS. In this example, the block area is for four times, the storage area is switched to a ring shape as shown in FIG. 6, and the writing area and the reading area are controlled by the pointer. The write pointer and read pointer are controlled by the following procedure.

  (S1) At the time of writing abnormal information (at the time of trigger), data is saved in the area of the write pointer, and the write pointer is incremented.

  (S2) At the time of reading abnormal information, data is read and the read pointer is incremented.

  Originally, the occurrence of storage and data reading are paired, so this pointer does not shift. In this case, since the stored data is empty, an “empty flag (no data flag)” is set.

  As shown in FIG. 7, the write pointer and the read pointer when the read process is not performed are controlled by the following procedure.

  (S1) At the time of writing abnormal information (trigger), data is saved in the write pointer area, and the write pointer is incremented.

  (S2) At this time, since the read process is not performed, the read pointer remains as it is (FIG. 7B).

  (S3) Subsequently, a memory change occurs and the write pointer advances, but the read pointer remains as it is (FIGS. 7C and 7D).

  (S4) When the fourth time occurs (FIG. 7E), the next write pointer catches up with the read pointer. At this time, there is no empty block and “full flag (no empty block)” is set.

  (S5) Thereafter, when a memory change occurs, the write pointer and the read pointer are incremented simultaneously. (The oldest data is discarded, the oldest block is overwritten).

  In the present invention, some or all of the processing functions of the method shown in FIG. 1 and the like can be configured as a program and executed by a computer.

The monitoring process and abnormality information storage processing flow which show embodiment of this invention. The block diagram of the storage buffer of the memory | storage information data in embodiment. 6 is an abnormal output process and an abnormal information read process flow in the embodiment. The abnormal information data storage processing flow in the embodiment. The abnormal information data read processing flow in the embodiment. 7 is a data write / read pointer switching example in the embodiment. 7 is a data write / read pointer switching example in the embodiment. Monitoring example of monitoring item (I / O output). The conceptual diagram of a monitoring process. Conventional storage information data and area configuration example. Conventional monitoring processing and abnormality information storage processing flow. Conventional monitoring error output processing and monitoring error display processing flow.

Claims (3)

Monitors the digital protective relay device, outputs an abnormal alarm when an abnormality occurs, restores an abnormal alarm output when an abnormality occurs, and stores abnormality information data consisting of several pieces of data per event of these abnormalities In the automatic monitoring method of the digital protective relay device,
A monitoring processing module and an abnormal output / display processing module separated from the monitoring processing module;
The monitoring processing module monitors the occurrence or return of an abnormality for each abnormal event, increases or decreases the count value of the abnormal counter in each mode distinguished by the abnormal mode at the time of occurrence or return of abnormality, and outputs an abnormal output according to the contents of each abnormal counter. A process of determining whether to
The abnormality output / display processing module includes a process of reading out the abnormality information data stored when an abnormality occurs, and a process of performing abnormality display output using the read out abnormality information data. Automatic monitoring method for equipment. The monitoring processing module and the abnormality output / display processing module treat the abnormality information data storage buffer as a data transmission / reception interface,
The write pointer and read pointer of abnormal information data to the storage buffer are switched in a ring shape,
2. The digital protection according to claim 1, wherein when abnormal information is written, data is saved in a write pointer area and the write pointer is incremented, and when abnormal information is read, data is read and the read pointer is incremented. Automatic monitoring method for relay devices.   A program that enables an automatic monitoring method for a digital protective relay device according to claim 1 or 2 to be executed by a computer.

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