JPH0777487B2 - Power system failure diagnosis device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a failure diagnosis device applied to a power system monitoring system.

(Prior Art) Generally, a power system monitoring system in a facility having a power receiving and transforming facility such as a factory, a hotel, and a tenant building as well as a power plant and a substation has a graphic panel for displaying the status of devices in the power system, CRT operator console (hereinafter CR
It is called a T-operator), and a message printer for recording and stopping equipment and recording failures. When an accident or failure (collectively referred to as failure) occurs in the power system, the failure item is confirmed by the graphic panel or the CRT opercon, and the message list is searched for the message related to the failure occurrence. I am trying to analyze the cause of failure. If necessary, a recorder or
The filing data of the CRT operation computer is investigated, and fluctuations in power, current, voltage, etc. are grasped and failure analysis is performed.

However, the failure analysis by such a conventional method has the following problems. That is, since the transition of the failure occurrence is analyzed by the message list, it is difficult to understand the relation between the individual devices of the power system and the failure occurrence transition of the entire power system. In addition, when investigating fluctuations in measured values such as power, current, and voltage that may cause failures, investigate filing data such as recorders and CRT operators, and determine the factors that have the greatest effect on time. Since we try to find out, failure analysis will take a long time.

(Problems to be Solved by the Invention) As described above, conventionally, it is not only difficult to grasp the failure occurrence transition of the entire power system, but also it takes a long time to analyze the failure occurrence factors. There was a problem.

The present invention has been made to solve the above-mentioned problems, and its purpose is to display a history trace display of a power system screen before a failure occurs when a failure occurs in the power system, thereby making it possible to display the entire power system. It is an object of the present invention to provide a power system failure diagnosis device capable of easily grasping the failure occurrence transition as described above, analyzing the cause of the failure quickly, and thereby improving the efficiency of failure diagnosis.

[Structure of the Invention] (Means for Solving Problems) The present invention relates to a signal input means for taking in various status signals of a power system and creating a system current status signal file, and an operator of this system current status signal file. In response to the request from the system, a signal history saving processing means that saves a signal history file to the signal history saving means at every fixed period and each time an event signal is input, and the current status signal file is edited to create a current status system screen. A system screen creating means having a first function of outputting and a second function of sequentially reading and editing a signal history file to create a system screen which becomes a history of the power system and sequentially outputting the trace, and this system screen creating means. A system screen display means for displaying the system screen in the current state output from the system and displaying the system screen as a history of the power system in a trace. This is a power system failure diagnosis device that aims to achieve the object.

(Operation) By providing such means, various status signals of the power system are taken in by the signal input means to create a system current status signal file, and this file is edited by the first function of the system screen creating means. Then create and output the current status system screen. As a result, the system screen in the current state is displayed on the system screen display means.

On the other hand, the system current state signal file is saved as a signal history file in the signal history saving means by the signal history saving processing means in response to a request from the operator at every fixed cycle and each time an event signal is input.

Then, the signal history file is sequentially read and edited by the second function of the system screen creating means to create a system screen serving as a history of the power system and sequentially output the trace. As a result, the system screen display means trace-displays the system screen that is the history of the power system.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing a configuration example of a power system failure diagnosis device according to the present invention. In FIG. 1, reference numeral 1 denotes a signal input means, which takes in various status signals in a power system (not shown), that is, device start / stop, ON / OFF, failure signals, and analog input signals from a measuring instrument, and a system current status signal. A device status file 21 and a measured value present value file 22 are created as file 2. Reference numeral 3 denotes a signal history storage processing means, which stores the device status file 21 and the measured value present value file 22 created by the signal input means 1 at regular intervals (in this case, in accordance with a request from the operator by the CRT opercon). For example, every 1 second) and each time an event signal is input (interruption of a power system failure signal or the like), it is saved in the signal history saving means 4 as a signal history file. Further, 5 is a system screen creating means, which has a function of editing the device status file 21 and the measured value present value file 22 created by the signal inputting means 1 to create and output a system screen, and the above signal history storage. It has a function of reading and editing the signal history file stored in the means 4 in response to a request from the operator, creating a system screen, and sequentially outputting traces. Furthermore, 6 is a system screen display means composed of a CRT or the like for displaying the system screen output from the system screen creation means 5.

Next, the operation of the power system failure diagnosis device configured as described above will be described with reference to FIGS. 2 to 4.

In FIG. 1, first, various status signals of the power system, that is, device start / stop, ON / OFF, failure signal,
And the analog input signal from the measuring instrument is acquired,
As shown in the figure, a device state file 21 and a measured value present value file 22 are created as the system present state signal file 2. Then, the system screen creating means 5 edits the device state file 21 and the measured value present value file 22 created by the signal inputting means 1 to create a system screen, which is the current power system screen, and the system screen displaying means 6 Is displayed.

On the other hand, the device status file 21 and the measured value present value file 22 created by the signal input means 1 are stored in the signal history saving processing means 3 as shown in FIG. 3 in response to a request from the operator to start / stop saving. As a result, the signal history file is stored in the signal history storage unit 4 every fixed period and every time an event signal is input. Here, the signal history storage means 4 is a circular file having n records, and the oldest data is updated to the latest data. Although the number of records n in this circulating file is arbitrary, it is set so that a history of at least about 30 minutes before the occurrence of a failure can be obtained in order to perform a sufficient analysis. The signal history file thus saved in the signal history saving means 4 is read as shown in FIG. 4 in response to a request from the operator, and is edited to create a system screen, The power system screen before the failure is sequentially displayed on the system screen display means 6 in a traced manner. Here, the display method is 1 from the time of failure occurrence.
BACKWARD TR that traces sequentially before second, second before and second time
There is ACE41 and FORWARD TRACE42 which traces sequentially from the oldest system screen to the newer one. That is, for example, in order to grasp the transition from 10 seconds ago to the time of failure occurrence, first, BACKWARD TRACE 41 is used to return to 10 seconds ago, and then FORWARD TRACE 42 is used to sequentially display traces. As described above, the failure occurrence transition on the power system screen can be easily grasped.

As described above, in the power system failure diagnosis device of the present embodiment, the power system screen can be trace-displayed with the time transition and the event (power system fault signal input, etc.) transition, so that the following operational effects are obtained. It is a thing.

(A) Since the transition of the failure occurrence in the power system can be investigated by the CRT opecon, the failure occurrence transition of the entire power system can be grasped very easily and quickly.

(B) Since fluctuations in measured values such as electric power, current, and voltage before the occurrence of a failure in the power system can be confirmed on the system screen, it is possible to easily carry out comparative examination of fluctuations in measured values and device failures.

(C) Since the actual failure transition of the power system is displayed in the history trace display, the system operation at the time of system failure can be easily confirmed, and it is also very effective in finding problems in the system.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be carried out without departing from the scope of the invention.

[Effects of the Invention] As described above, according to the present invention, when a failure occurs in the power system, the power system screen before the failure occurs is displayed as a history trace, so that the failure occurrence in the entire power system occurs. It is possible to provide a power system failure diagnosis device capable of easily grasping transitions, analyzing a failure occurrence factor quickly, and improving efficiency of failure diagnosis.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of a power system failure diagnosis apparatus according to the present invention, FIG. 2 is a flow chart for explaining the operation in the embodiment, and FIGS. 3 and 4 are the same embodiment. FIG. 6 is a diagram for explaining the respective actions in FIG. 1 ... Signal input means, 2 ... system current status signal file, 21 ... device status file, 22 ... measured value current value file, 3 ... signal history storage processing means, 4 ... signal history storage means, 5 …… System screen creating means, 6 …… System screen displaying means.

Claims (2)

[Claims] 1. A signal input means for taking in various status signals of a power system and creating a system current status signal file; and a system current status signal file for each fixed cycle and each event signal input in response to a request from an operator. A signal history saving processing means for saving as a signal history file to the signal history saving means, a first function of editing the system current state signal file and creating and outputting a system screen of the current state, and the signal history file A system screen creating means having a second function of sequentially reading and editing to create a system screen that becomes the history of the power system and sequentially outputting the trace, and a system screen in the current state output from the system screen creating means are displayed. And a system screen display means for displaying a trace of a system screen that is a history of the power system. Diagnostic equipment. 2. The power system failure diagnosis device according to claim 1, wherein the event signal is a power system failure signal.