JPH02126165A - Fault diagnostic device for substation facility - Google Patents

Abstract

PURPOSE:To surely diagnose the cause of a fault without relying on the skillfulness of an operator or maintenance attendant by previously storing data corresponding to the sixth sense of the operator or attendant obtained from their experiences. CONSTITUTION:In a substation facility, diagnostic objects are designated from a designating means 110 and the number of the objects is decided by means of a number discriminating means 111. When the diagnostic objects are plural, the diagnostic priority is decided by a priority deciding means 112 and, at the same time, statuses of each object to be diagnosed are analyzed by means of a status data analyzing means 113 after the data are inputted to the means 113. A counting means checks the number of the status data and a 1st checking means 120 checks the data for a contradiction. Then the status data are compared with previously fault data and a deciding means 118 decides the cause of a fault and displays the cause on the 1st display device 119. When a contradiction exists among plural status data, a 2nd checking means 121 checks the status data for an input error and, when an error is found, the presence of the error is displayed on the 2nd displaying means 122.

Description

[Detailed Description of the Invention] Industrial Field of Use] This invention relates to a fault diagnosis device for substation equipment.

[Background Art] A substation generally includes a system monitoring panel provided in a building and various substation equipment connected to the system monitoring panel via cables. Each substation device is equipped with an operating mechanism for operating the substation device and a display device for displaying its status. The operating mechanism is provided near the substation equipment, and the display device is provided on the system monitoring panel.

The system monitoring panel consists of a fault display panel, a system panel that shows the operating status of each substation device, and an operation panel that opens and closes each substation device. The failure display panel has various display devices such as lamps and buzzers, and is designed to indicate when a failure occurs in the corresponding substation equipment. In addition, the operation panel has an operation selector switch and various power switches, etc.
In addition, there are operating quantity meter opening/closing display devices such as circuit breakers, oil pressure gauges, gas pressure gauges, etc.

In conventional substations, operators or maintenance personnel monitor the status of these substation equipment on a system monitoring panel. If a failure occurs in these substation equipment, the system monitoring panel,
These conditions are displayed on the fault display panel and operation panel, but
When a plurality of display devices display the status of the same failure, the information provided by each display device may be contradictory. For example, a system panel may indicate that a device is open, but the display on the control panel for that device may indicate closed. In such a case, the operator determines which information is correct or reliable based on experience and intuition.

Furthermore, when multiple failures occur simultaneously, the priority order for responding to them is determined based on the severity and urgency of the failures, based on the operator's experience and intuition.

[Problems to be Solved by the Invention] Conventional failure diagnosis of substation equipment is performed based on the experience and intuition of operators or operators, so errors in judgment may occur due to differences in the skill levels of operators or operators. There is. For example, when multiple failures occur, the priorities for dealing with them may be incorrect.

Furthermore, if a plurality of mutually contradictory indications are displayed for the same failure, it may not be possible to determine which one is more reliable and correct. Furthermore, there is a problem in that the user may not be able to notice inconsistencies between pieces of information displayed on a plurality of display means. Solving these problems was a task to be achieved in order to provide a highly reliable fault diagnosis device.

The present invention is aimed at solving the above-mentioned problems, and it is an object of the present invention to provide an apparatus that can obtain a reliable diagnosis without depending on the skill level of the operator or maintenance personnel.

[Means for Solving the Problems] The fault diagnosis device for substation equipment of the present invention specifies the diagnosis targets in the substation equipment by a specifying means, determines the number by a number determination means, and prioritizes diagnosis targets when there are multiple diagnosis targets. The priority is determined by the ranking determining means, and the situation to be diagnosed is input and analyzed by the situation data analysis means.The number of situation data is checked by the counting means, and if there are multiple pieces of situation data, whether there is any inconsistency between the situation data. The cause of the failure is determined by the determining means by comparing the status data with pre-recorded failure data and displayed on the first display device. In such a case, the second investigation means checks whether there is an error in inputting the situation data, and if there is an error, the second display means displays the fact.
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[Operation] Data corresponding to the operator's or operator's experience and intuition is recorded in advance in the memory of the device, and when a failure occurs, the condition can be diagnosed by comparing with that data.

[Embodiment] FIG. 1 shows a block diagram of a transformer membrane ON failure diagnosis device of the present invention. In the figure, diagnosis target specifying means 1
Reference numeral 10 denotes a manual operation means for specifying, by a predetermined method, the substation equipment in which the operator has noticed the occurrence of a failure, and is comprised of, for example, a switch. Diagnosis target specification means 1
10 can also be automatically designated by a fault finding device installed in each substation facility. Next, the number of substations that are targeted for diagnosis is determined by the number-of-diagnosis-target determining means iit, and if the number is multiple, the priority order among the respective diagnostic targets is determined by the priority determining means 112.

Next, the situation data detected by the situation data detection means 114 is inputted by the situation data input means 113.

The situation data includes, for example, current value, voltage value, rotation speed, temperature, pressure, etc. The number of input situation data is counted by the situation data counting means l15. If there is a plurality of pieces of situation data, the first investigation means 120 investigates whether there are any inconsistencies between the pieces of situation data. Inconsistency in status data is, for example, when the open/close display of a certain switch shows "duration" on the system panel, but "closed" on the control panel of the device.

If there is no contradiction in the status data, it is input to the determining means 118 and compared with the failure data stored in advance in the failure data memory means 116 to determine the cause of the failure.

Once the cause of the failure is determined, the result is displayed as the first means of display! 1
Display on 9.

If there is a contradiction between the plurality of situation data input by the first investigation means 120, the second investigation means 121 investigates whether there was an error in the input of the situation data. If there is an error, it is displayed on the second display means 122.

In the block diagram of FIG. 1, each means surrounded by a dashed line is included in the computer 124.

FIG. 2 shows the configuration of an actual device according to the present invention. In the figure, a computer 124 is a CPU 1 for performing the functions of each means surrounded by a dashed line in FIG.
25 and failure data memory means 116. Situation data is input to the CPU 125 from the situation data detection means 114, and a diagnosis target is specified by the diagnosis target designation means iio. The output of the CPU 125 is the first
is displayed by the display means 119 and the second display means 122.

Next, the operation of this invention will be explained.

FIG. 3 is a flowchart showing the processing procedure of the substation equipment failure diagnosis device of the present invention. At step 10 in the figure, equipment to be diagnosed is designated. The target of diagnosis in step 10 is equipment in a faulty state, and its designation is performed manually by an operator or automatically by a fault detection device installed in each substation equipment. Next, in step 11, it is determined whether there is one or more diagnostic targets. If there is more than one object to be diagnosed, the order of priority is determined in step 12. The priority order is determined by the priority order determination rule shown below.
and 2. That is, according to rule 1, when there is no causal relationship between multiple diagnostic targets, the one with the highest degree of urgency is processed first. Further, as rule 2, if there is a causal relationship between the diagnostic targets, the diagnostic target that is the cause is processed first, and the λj event that has become a failure state as a result of that cause is postponed.

Next, in step 13, situation data is input. The input situation data is checked in step 15 to see if the number of situation data is one or more. If there is a plurality of situation data, it is checked in step zO whether or not there are any inconsistencies among them. If there is no contradiction, previously recorded failure data is read in step 16. Further, in step 17, it is checked whether other situation data is necessary, and if necessary, the process returns to step 13. In step 18, the read failure data and status data are compared to identify the cause of the failure, and in step 19, the cause and its countermeasures are displayed.

On the other hand, if there is a contradiction between the plurality of situation data, it is checked in step 21 whether an error occurred in the manual input of the situation data. If there is no error in the input of the situation data, the situation data itself is incorrect, so proceed to step 22.
If there is an error in inputting the situation data to display it, the process returns to step 13 and new situation data is input.

[Effects of the Invention] According to this invention, when a failure occurs in substation equipment, the cause of the failure can be automatically identified by processing the data on a computer as shown in the flowchart of Figure 1. It becomes possible to accurately identify the cause of failure without relying on skill or expertise.

[Brief explanation of drawings]

FIG. 1 is a block diagram of this invention, FIG. 2 is a block diagram of this invention, and FIG. 3 is a flowchart showing the operation of this invention. In the figure, 110 is a diagnostic target specifying means, 111 is a diagnostic target number determining means, 112 is a priority determining means, 115 is a counting means, 118 is a determining means, 119 is a first display means, 12
0 is the first investigation means, 121 is the second investigation determination means, 1
22 is a second display means.

Claims (1)

[Claims] (1) Diagnosis target designating means for specifying diagnostic targets in substation equipment; diagnostic target number determining means for determining the number of designated diagnostic targets; priority determining means for determining the priority order of multiple diagnostic targets when there are multiple diagnostic targets; a counting means for inputting situation data to be diagnosed and checking the number; a first investigating means for checking whether there is a contradiction between each situation data when there is a plurality of situation data; Judgment means for identifying the cause of the failure by comparing it with the failure data that has been identified; A first display means for displaying the identified cause of failure and its countermeasures; If there is a discrepancy between multiple pieces of status data, an error is detected in inputting the status data. A fault diagnosis device for substation equipment, comprising: a second investigation means for checking whether or not there has been an error; and a second display means for displaying an incorrect input of the situation data when there is an error in the input of the situation data.