JPH08247799A - Abnormality recording apparatus - Google Patents

Abstract

PURPOSE: To obtain an abnormality recording apparatus by which abnormalities generated continuously can be captured and by which the abnormalities can be analyzed accurately. CONSTITUTION: An abnormality recording apparatus is provided with a plurality of status storage means 1, 2, 3, 4 to which status signals and trigger signals are input and which are provided respectively with trigger prestorage parts 1, 3 and trigger post-storage parts 2, 4. The trigger prestorage parts 1, 3 cyclically store the input signals which are input, the trigger post-storage parts 2, 4 store the status signals sequentially, and they stop a storage operation when they store a decided storage capacity portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality recording device for recording a status signal of an object to be analyzed during an abnormality.

[0002]

2. Description of the Related Art Plant equipment such as power plants and substations and their control devices play a role of supplying power, which has a great social impact, and an abnormality such as a failure has a great influence. , High reliability is required. Therefore, at the time of the abnormality, it is extremely important to accurately grasp the abnormal state and consider recurrence prevention. Therefore,
In many cases, an anomaly recording device is installed which can memorize the states before and after the anomaly, reproduce the memorized state, and analyze the anomaly.

In the conventional abnormal recording apparatus, data is sequentially written in one storage area, and when the storage area reaches the end, it returns to the beginning, and has a buffer structure (round robin buffer) in which the order is circulated, and after a trigger occurs. After a certain time, writing to the buffer is stopped and the abnormal situation is stored. Then, the data is extracted from this buffer and used for analysis.

[0004]

In many cases, a power system accident is a continuous abnormality due to a ripple phenomenon. In some cases, the first abnormality is an important phenomenon and the last abnormality is an important event. . However, in the conventional configuration,
When overwriting is not permitted, only the first trigger becomes valid, and when overwriting is permitted, only the last trigger becomes valid, and as a result, only one abnormality could be captured. An object of the present invention is to obtain an anomaly recording apparatus that can catch anomalies that occur continuously and perform accurate anomaly analysis.

[0005]

In order to achieve the above object, in the present invention, an input means for inputting a status signal of an analysis object and a trigger signal indicating occurrence of abnormality of the analysis object,
And a plurality of state storage means for storing the plant state before and after the trigger signal for each trigger signal, comprising a pre-trigger storage unit and a post-trigger storage unit, wherein the pre-trigger storage unit sequentially inputs the state signals sequentially input. When the storage capacity is exceeded, the storage area is cyclically used by overwriting from the old storage portion when the storage capacity exceeds a predetermined value, and the storage operation is stopped after the trigger signal is input.
There is provided an abnormal recording device characterized in that, when the trigger signal is input, the sequentially input state signals are sequentially stored, and when the predetermined storage capacity is stored, the storage operation is stopped.

Further, in order to achieve the above object, in the present invention, input means for inputting a status signal to be analyzed and a trigger signal indicating occurrence of abnormality in the analysis object, and the sequentially input status signals are sequentially stored, When the specified storage capacity is exceeded, the storage area is used cyclically by overwriting from the old storage, and the storage operation is stopped when the predetermined storage capacity is stored from the first trigger signal input. There is provided an abnormality recording device comprising: means and a storage location storage means for sequentially storing storage locations where the status storage portion stores the status signal when a trigger signal is input.

Further, in order to achieve the above-mentioned object, in the present invention, the behavior of the plant such as the equipment of the power plant and substation and their control devices is constantly input, and when there is an abnormality, the states before and after that are stored. , Then, in an abnormal recording device for reproducing the stored state, an A / D conversion unit for converting an analog signal waveform input from the plant from analog to digital, and data after A / D conversion at a predetermined sampling period. Therefore, a sampling processing unit for sampling, a sampling value storage unit for storing data values obtained by sampling, and an arithmetic processing unit for arithmetically processing sampled data values are provided, and the sampling value storage unit is pre-triggered storage. Provided is an abnormality recording device characterized by having at least two or more sets in combination with a post-trigger storage unit. .

Further, in order to achieve the above-mentioned object, in the present invention, the behavior of the plant such as the equipment of the power plant and the substation and their control devices is always input, and when there is an abnormality, the states before and after that are stored. , Then, in an abnormal recording device for reproducing the stored state, an A / D conversion unit for converting an analog signal waveform input from the plant from analog to digital, and data after A / D conversion at a predetermined sampling period. Therefore, a sampling processing unit for sampling, a sampling value storage unit for storing data values obtained by sampling, and an arithmetic processing unit for arithmetically processing sampled data values are provided, and the sampling value storage unit stores at least two times. Data value storage area more than the trigger amount and the data value data value storage area stored when the trigger occurred Providing an abnormal recording apparatus characterized by having the land of the storage area.

[0009]

According to the present invention, the state signal before and after the first trigger is written in one state storage means of the plurality of state storage means, and the state signal before and after the second trigger is the next state. The abnormal situation is continuously recorded by writing in the storage means.

According to the second or fourth aspect of the present invention, the fetched status signals are continuously written in the status storage means, and the storage locations at the time when the trigger is generated are sequentially stored in the storage location storage means. Record the abnormal situation.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of an apparatus to which an embodiment of the present invention is applied. The voltage / current at the time of a power system fault is input as analog signal data, and the A / D converter 7 performs data conversion from an analog value to a digital value.

The voltage / current of the power system is transmitted by a transmission means such as LAN. Reference numeral 8 denotes a microcomputer that constitutes a sampling processing unit and a sampling value storage unit. The microcomputer 8 has a central processing unit 8A, a ROM 8B storing a program for operating the central processing unit 8A in a predetermined order, a RAM 8C for temporarily storing data, an input port 8D as an input means, and an output. It is composed of a port 8E.

Fault voltage / current data and the like are input as digital signals from the A / D converter 7 to the input port 8D. The value of the digital signal is processed according to a sampling program having a preset sampling period and stored in the RAM 8C.

That is, the central processing unit 8A and the ROM
8B constitutes a sampling processing unit, and the RAM 8C constitutes a sampling value storage unit which is a state storage unit or a storage location storage unit.

In the above configuration, the first or third aspect is provided.
The operation of the first embodiment corresponding to the described invention will be described with reference to FIG.
Will be described with reference to. In order to simplify the description, the case where there are two trace buffers that are state storage means will be described. Each of the two buffers is composed of a primary buffer and a secondary buffer, and is switched and used by detecting a trigger.

The sampled digital data is sequentially stored in the pre-primary-trigger buffer 1 by the start of tracing of the abnormal recording device. When the buffer 1 before the primary trigger is full, the write address is returned to the beginning, the new data is given priority, and the old data is overwritten. In this way,
The primary pre-trigger buffer 1 is used as a circular round robin buffer.

When a trigger occurs, the writing to the buffer 1 before the primary trigger is completed, and the sampled values after that are written to the buffer 2 after the primary trigger. This buffer is never overwritten and is frozen when a preset amount of information is fetched.

The sampling data fetched after freezing can be switched to be written in the buffer 3 before the secondary trigger. The buffer 3 before the secondary trigger is also the buffer 1 before the primary trigger
Used as a circular buffer as in. If a trigger occurs again here, the writing is switched to the post-secondary-trigger buffer 4 as described above.

In this way, by having the pre-trigger buffer and the post-trigger buffer separately, if the triggers are continuously generated while writing to the post-primary-trigger buffer 2 by the trigger occurrence, the secondary trigger is generated. By controlling the writing to the rear buffer 4, it is possible to take in the data without losing the data even when an abnormality occurs continuously. In the above explanation, the buffer is 2
As described in two cases, if necessary, the number of buffers can be increased to support more continuous trigger generation.

The operation of the second embodiment corresponding to the second or third aspect of the invention will be described with reference to FIG. The data such as the fault voltage and current fetched by sampling is sequentially written in the data buffer (data value storage area) 5 which is the state storage means. The data buffer 5 is a circular round-robin buffer, and when the data is fetched to the end of the buffer, the writing is returned to the beginning and overwritten for use. When the trigger is generated, the write address is stored in the address buffer (address storage area) 6 which is the storage location storage means, and the data acquisition is continued.

Even when the trigger is generated again, the generation address is stored in the address buffer 6 and the data acquisition is continued. After the trigger is generated, the writing of the data buffer 5 is circulated, and the writing is frozen when the writing catches up with the address that is the preset address before the first trigger address.

In this way, by having the data buffer 5 and the address buffer 6, it becomes possible to take in data even with a relatively small buffer without losing abnormal data that has occurred continuously.

[0023]

According to the present invention, since continuous triggers can be dealt with, it is possible to accurately grasp a continuous abnormal situation, and it is possible to significantly improve abnormality analysis. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of first and second embodiments.

FIG. 2 is a schematic diagram showing the configuration of a storage area according to the first embodiment.

FIG. 3 is a schematic diagram showing a configuration of a storage area according to a second embodiment.

[Explanation of symbols]

1 ... before primary trigger buffer, 2 ... after primary trigger buffer, 3 ... before secondary trigger buffer, 4 ... after primary trigger buffer, 5 ... data buffer, 6 ... address buffer, 7
... A / D converter, 8 ... Microcomputer, 8A ... Central processing unit, 8B ... ROM, 8C ... RAM, 8D ...
Input port, 8E ... Output port, 9 ... Display section.

Claims (5)

[Claims] 1. An input unit for inputting a status signal of an analysis target and a trigger signal indicating occurrence of an abnormality of the analysis target, and a pre-trigger storage unit and a post-trigger storage unit for storing plant states before and after the trigger signal for each trigger signal. The pre-trigger storage unit sequentially stores the state signals that are sequentially input, and when the storage capacity exceeds a predetermined storage capacity, the pre-trigger storage unit overwrites the old storage portion and stores the state signals cyclically. The storage area is used to stop the storage operation after the trigger signal is input, and the post-trigger storage unit sequentially stores the state signals that are sequentially input when the trigger signal is input, and has a determined storage capacity. An abnormality recording device characterized in that the storage operation is stopped when the minutes are stored. 2. An input means for inputting a status signal to be analyzed and a trigger signal indicating occurrence of an abnormality in the analysis object, and the status signals to be sequentially input are sequentially stored. When the storage capacity exceeds a predetermined storage capacity, the old storage portion is deleted. By using the storage area cyclically by storing while overwriting, when the predetermined capacity is stored from the first trigger signal input, state storage means for stopping the storage operation, and when the trigger signal is input An abnormality recording apparatus, comprising: a storage location storage means for sequentially storing storage locations where the status storage unit stores a status signal. 3. An abnormality recording device for constantly inputting plant behavior such as equipment of a power plant and substation and their control devices, and storing the states before and after the abnormality and the like, and then reproducing the stored state. A / D for converting analog signal waveform input from plant from analog to digital
A conversion unit, a sampling processing unit that samples the A / D converted data according to a predetermined sampling cycle, a sampling value storage unit that stores the data value obtained by sampling, and a sampled data value. An abnormality recording device, comprising: an arithmetic processing unit for performing arithmetic processing, and having at least two sets of the sampling value storage unit in combination of a pre-trigger storage unit and a post-trigger storage unit. 4. An abnormality recording device for constantly inputting plant behavior such as equipment of a power plant and substation and their control devices, and storing the states before and after the abnormality and the like, and then reproducing the stored state. A / D for converting analog signal waveform input from plant from analog to digital
A conversion unit, a sampling processing unit that samples the A / D converted data according to a predetermined sampling cycle, a sampling value storage unit that stores the data value obtained by sampling, and a sampled data value. An arithmetic processing unit for performing arithmetic processing, wherein the sampling value storage unit has a data value storage area for at least two triggers and a storage area of an address stored in the data value data value storage area when a trigger occurs. Abnormality recording device characterized by. 5. An analog waveform is transmitted by LAN transmission or the like.
The abnormality recording device according to claim 3, wherein the abnormality recording device inputs the data to a / D conversion unit.