JPS6258208B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an accident analysis device, and in particular, the present invention relates to an accident analysis device, and in particular, it captures driving information transmitted from various places via a data exchange device, and displays a system diagram of a CRT display device. The present invention relates to an accident analysis device suitable for use in an electric power system that employs the electronic computer system shown above.

[Conventional technology]

In recent years, in electric power systems, operational information transmitted from various sources, such as numerical information regarding power flow, reactive power, voltage, and frequency (hereinafter simply referred to as numerical information), is transmitted via data exchange equipment. Electronic computer systems that capture information and display it on a CRT diagram are being adopted.

In such a system, it is most important to display the latest information on the system diagram to make operation easier for the operator, but it is also important to memorize and display or print past operating conditions. It has also become an important task to do so. In particular, it is important to inform operators of the system status before and after the accident occurs. Conventional techniques related to this point include the following.

(1) Whether to store numerical information at the time when the protective relay operation due to an accident is connected to the computer system, and print that information using a typewriter, etc. after the fact.
Display in tabular format on CRT.

(2) When the trip of a power line breaker is connected to a computer system, the power flow value immediately before the trip is stored for the line concerned or its related line, and after the fact, this information can be used to determine when the line breaker tripped. Will it be printed with a typewriter, etc. along with the information?
Display in tabular format on CRT.

[Problem that the invention seeks to solve]

Now, with such conventional technology, although it satisfies the minimum requirement of the operator to know the load (power flow value) that was severed due to the tripping of the breaker, it is difficult to understand why the accident occurred. There was no response to the operator's request for an after-the-fact analysis of the circumstances surrounding the accident, and furthermore, of the system disturbance caused by the accident.

Therefore, the imported system information is saved and memorized, and the past system status is displayed on the CRT using this stored information.
It is easy to think of analyzing the accident by replaying it on the system diagram screen. However, as described below, the required storage capacity would be enormous, so there was no example of actual implementation. For example, there are usually about 500 pieces of numerical information, but if we were to store the information every 5 seconds, it would take 8,640 kilograms of memory to store just one day's worth of information. In recent years, the storage capacity of power system control electronic computer systems is approximately 10,000 kilograms for large systems, so storing just one day's worth of information for playback and display uses up most of the storage capacity. .

In addition, conventional accident analysis devices mainly store and display numerical information, including binary information (hereinafter simply referred to as binary information) regarding the on/off status of the circuit breaker and the operating status of the protective relay. Since changes in numerical information were not displayed in an organic manner, there was a lack of information necessary for accident analysis.

An object of the present invention is to provide an accident analysis device that can store and analyze numerical information and binary information before and after an accident in association with each other with a small storage capacity.

[Means for solving problems]

In order to achieve the above object, the present invention provides a data exchange device that takes in operating information transmitted from various parts of a controlled system, and a current numerical information storage device that stores the latest numerical information regarding operating parameters among the operating information. , a current binary information storage device that stores the latest binary information regarding the operating status of the equipment among operating information, a previous binary information storage device that stores the previous binary information, and a storage device that stores numerical information of multiple cases. A pre-accident numerical information storage device that can be used for multiple cases
a pre-accident binary information storage device capable of storing value information;
An accident numerical information storage device that can store multiple groups of numerical information of multiple cases, an accident binary information storage device that can store multiple groups of binary information of multiple cases, and a current numerical information storage device. While transferring the contents to the part of the pre-accident numerical information storage device where the oldest information is stored,
After system accident information is input, it is transferred to the accident numerical information storage device for a certain period of time, and at the time of occurrence of a system accident, the contents of the pre-accident numerical information storage device are transferred to the accident numerical information storage device. A pre- and post-accident numerical information collection device that clears the content of
When a change in binary information occurs, the current
The contents of the value information storage device are transferred to the pre-accident binary information storage device, while the contents of the system accident information are transferred to the accident binary information storage device only for a certain period of time after the system accident information is input, and the pre-accident binary values are transferred at the time of the system accident occurrence. A binary information collection device before and after the accident that transfers the contents of the information storage device to the binary information storage device at the time of the accident and clears the contents of the binary information storage device before the accident, a numerical information storage device at the time of the accident, and the binary information at the time of the accident. This invention proposes an accident analysis device that includes an accident information re-output device that displays the contents of a storage device on a display device.

That is, the present invention focuses on the fact that the most necessary past information is about one minute before and after a system accident, and in addition to the current information storage device and the past information storage device, the pre-accident and pre-accident storage devices are numerically stored. information and binary information, and normally information is always transferred from the current information storage device to the pre-accident information storage device, and when a system accident occurs, the contents of the pre-accident information storage device are transferred to the accident information storage device, and then the current information is transferred to the accident information storage device. Information is transferred from the information storage device to the accident information storage device for a certain period of time.

[Effect]

In the present invention, when storing driving information before and after an accident, numerical information and binary information are associated with each other in a one-to-one manner. It is possible to analyze while clarifying the correspondence between and phenomena.

For example, in a system where power is transmitted from one power plant to consumers via two substations A and B, and both substations are connected for mutual backup, from the power plant to B. If a trip occurs in the system going to a substation, and if there is capacity at substation A, substation B can be backed up and power can be transmitted to customers connected to substation B, but if the capacity is exceeded, , substation A also trips.

Even in such a situation, it is possible to accurately analyze the cause-and-effect relationship of an accident using driving information provided as a pair of numerical information and binary information.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an accident analysis device according to the present invention. Numerical information and binary information are collected by an information transmission device (slave station) 1 and transmitted to an information transmission device (master station) 2. These pieces of information are taken in via the data exchange device 3, the numerical information is currently stored in the numerical information storage device 4, and the binary information is currently stored in the 2-value information storage device 4.
is stored in the value information storage device 5 (hereinafter, the "contents of the current numerical information storage device 4" will be referred to as "current numerical information").
The "contents of the current binary information storage device 5" is also referred to as "current binary information." ). The pre-accident numerical information storage device 9 is divided into five parts, and one part can store current numerical information and the time at which the information was collected.

The pre- and post-accident numerical information collection device 7 always stores the current numerical information in the pre-accident numerical information storage device 9 every 5 seconds. At this time, if information exists in all five parts, the oldest information is deleted and new information is stored in this part. When the "accident information input" signal is output from the pre-accident and pre-accident binary information collection device 8, the pre- and post-accident numerical information collection device 7 arranges all the contents of the pre-accident numerical information storage device 9 in chronological order, and The information is stored in the numerical information storage device 11, and all contents of the pre-accident numerical information storage device 9 are cleared.

The accident numerical information storage device 11 is divided into 60 parts, and each part has a capacity to store the current numerical information of 12 cases. When performing the above storage, it is stored in the empty part of the 60 parts, or if there is no empty part, in the part where the latest information is stored. The reason for doing this is to avoid erasing information regarding the preceding serious accident. That is, the stored accident information is reproduced one by one by the accident information reproducing output device 13 for accident analysis.
Once completed, it will be deleted (you can also print it out before deleting it). Therefore, usually about 10 groups are used, and not all 60 groups are used. In the unlikely event that 60 groups become full, the accumulated accident information may have been deemed important by the operator for some reason and have been left there for a long time. Assuming that the level is low, we store the latest information in the storage section by overlapping it with new information. In reality, this problem does not occur because information that is no longer needed is deleted. Thereafter, for seven cycles of 5 second intervals, the current numerical information is not transferred to the pre-accident numerical information storage device 9, but is transferred to the accident numerical information storage device 1.
Transfer to the relevant part of 1. After 7 cycles,
It is stored again in the pre-accident numerical information collection storage device 9.

On the other hand, the data exchange device 3 imports the binary information from the binary information storage device (master station) 2, compares the previous binary information stored in the previous binary information storage device 6 with the binary information imported this time, and then If there is a change, this is communicated to the pre- and post-accident binary information collection device 8, and the previous binary information storage device 6 is updated. Upon receiving the notification, the pre-accident and pre-accident binary information collection device 8 received the following information:
The value information is transferred to the pre-accident binary information storage device 10, and the accident information definition storage device 15 is indexed to determine whether the information indicates a system accident.

If it is determined that a system accident has occurred, this is communicated to the pre-accident numerical information collection device 7, and the information from the point five cycles before the present is retrieved from the contents of the pre-accident binary information storage device 10, and is stored in chronological order. It is stored in the binary information storage device 12 at the time of the accident, and
All contents of the value information storage device 10 are reset. The accident binary information storage device 12 is divided into 60 parts, and each part has a capacity to store the current binary information of 24 cases. These 60 parts have a one-to-one correspondence with the 60 parts of the accident numerical information storage device 11, and the corresponding parts are always used in pairs. After a system fault is determined, the current binary information is not transferred to the pre-accident binary information storage device 10 for 7 cycles of 5 seconds, but is transferred to the accident binary information storage device 12.
Transfer to the appropriate section. After seven cycles have passed, the pre-accident binary information is stored in the storage device 10 again.

FIG. 2 shows the functions of the pre- and post-accident numerical information collection device 7, and the storage contents of the current numerical information storage device 4, the pre-accident numerical information storage device 9, and the accident-time numerical information storage device 11, the storage contents of which are changed by this device. This is explained in terms of changes over time. In the diagram, time passes from left to right, and each square represents a storage capacity for one time of numerical information. The numbers with N at the top in the squares are the current numerical information of the 5 second periodic cycle and the numerical information to which it has been transferred. As shown in the figure, the current numerical information N1, N2,
After N3, N4, and N5 are stored in the pre-accident numerical information storage device 9, N6 erases the oldest N1 and is stored in its place.

FIG. 3 shows the functions of the pre-accident and pre-accident binary information collection device 8, including the current binary information storage device 5 whose storage contents change according to this device, the pre-accident binary information storage device 10, and the accident binary information storage device. This is explained in terms of changes in memory contents over time in No. 12. In the figure, time passes from left to right, and the squares represent the storage capacity for one batch of binary information. Numbers with S at the end of the square are currently binary information. As shown in the figure, new binary information is currently input every time a state change occurs, and in the event of an accident, it is transferred to the accident binary information storage device 12.

The system accident information collected as described above is stored in the accident numerical information storage device 11 and the accident binary information storage device 12, and is stored in the accident information reproducing output device 1.
3 causes the CRT 14 to display a system diagram based on information at the time of the accident.

In this embodiment, since numerical information and binary information are handled differently, it is possible to handle each piece of information in a way that is appropriate for the nature of the information. That is, 2
Regarding value information, when an accident occurs, the order of detailed state changes within a 5-second cycle is important, and this order can be reliably grasped. Note that it is of course possible to sample numerical information in the same way as binary information.

In addition, in the above embodiment, the current numerical information collection cycle is 5 seconds, and the cycle before the accident occurs is 5 seconds.
Although the information collection time after an accident was set to 7 cycles, the cycles are not limited to the above embodiments, and may be other cycles or number of cycles.

Further, in the above embodiment, the present invention is applied to accident analysis of a power system, but it is clear that the present invention can be similarly applied to general accident analysis.

〔Effect of the invention〕

According to the present invention, since only the driving information before and after the system accident is extracted and stored, the information at the time of the accident can be stored within a practical storage capacity. Specifically, about 1000
Accident information can be memorized in kilograms, approximately 8 times faster than before.
It only requires 1/1 the storage capacity.

At that time, numerical information and binary information are stored in a one-to-one correspondence, so accidents that occur due to causal relationships between controlled system elements can be analyzed while clearly understanding the correspondence between causes and phenomena. It is possible.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the overall configuration of an embodiment of the accident analysis device according to the present invention, Fig. 2 is a diagram showing changes in numerical information in the numerical information collection device before and after the accident in the embodiment of Fig. 1, and Fig. 3 2 is a diagram showing changes in binary information in the binary information collection device before and after the accident. 3... Data exchange device, 4... Current numerical information storage device, 5... Current binary information storage device, 6... Previous binary information storage device, 7... Numerical information collection device before and after the accident, 8
... Pre-accident binary information collection device, 9... Pre-accident numerical information storage device, 10... Pre-accident binary information storage device, 1
1... Accident numerical information storage device, 12... Accident binary information storage device, 13... Accident information reproducing display device,
14...CRT.

Claims (1)

[Scope of Claims] 1. A data exchange device that takes in operating information transmitted from various parts of the controlled system; a current numerical information storage device that stores the latest numerical information regarding operating parameters among the operating information; Among the information, there is a current binary information storage device that stores the latest binary information regarding the operating status of equipment, a previous binary information storage device that stores the previous binary information, and a pre-accident information storage device that can store numerical information from multiple cases. A numerical information storage device, a pre-accident binary information storage device that can store binary information of multiple cases, an accident numerical information storage device that can store multiple groups of numerical information of multiple cases, and a binary information storage device of multiple cases. An accident binary information storage device that can store multiple groups of groups; and a system that normally transfers the contents of the current numerical information storage device to the part of the pre-accident numerical information storage device where the oldest information is stored; After the accident information is input, it is transferred to the accident numerical information storage device for a certain period of time, and when a system accident occurs, the contents of the pre-accident numerical information storage device are transferred to the accident numerical information storage device, and the contents of the pre-accident numerical information storage device are stored. A pre-accident numerical information collection device that clears the contents, and a system accident information collection device that, when a change in the binary information occurs, normally transfers the contents of the current binary information storage device to the pre-accident binary information storage device. After the input, data is transferred to the accident binary information storage device for a certain period of time, and at the time of occurrence of a system accident, the contents of the pre-accident binary information storage device are transferred to the accident binary information storage device, and the pre-accident binary information is stored. Accident analysis equipped with a pre-accident binary information collection device for clearing the contents of the device, and an accident information reproducing output device for displaying the contents of the accident numerical information storage device and the accident binary information storage device on a display device. Device.