JP3073502B2 - Patrol inspection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a patrol inspection system suitable for inspection and monitoring of substation equipment.

(Prior Art) In modern society, electric power is indispensable, and demand for stable supply of electric power is expected to increase in the future, as power outages are often a social problem.
Also, if an accident occurs in substation equipment, its impact may be very large, so it is necessary to prevent the occurrence of the accident beforehand by anticipating the precursory phenomena before the accident. Coveted. For this reason, substations generally perform patrols and inspections about once a month or several months, collect various data on each device, and determine whether there is any abnormality.

In recent years, with the increase in power demand, gas-insulated switchgears with high voltages and large capacities such as 275 KV and 500 KV have been added to conventional substations to which air-insulated equipment has been applied. That is, FIG. 4 shows a plan view of a general substation, where part A is a 500 KV gas insulated switchgear, part B is a 500 KV / 275 KV transformer, part C is a 275 KV air insulated switchgear,
Part D is a 275KV / 66KV variable pressure air, and part E is a 66KV air insulated switchgear. Patrol and inspection work at such a substation has been carried out by a patrol member carrying a record table for recording the state of equipment and various data and sequentially turning around each equipment in the substation.

(Problems to be solved by the invention) However, in the above-mentioned conventional patrol inspection system, there are problems to be solved as described below.

That is, in a substation as shown in FIG. 4, when a patrol / inspection operation is performed based on the conventional system, the inspection data becomes enormous due to the large number of constituent devices, and the inspection data is very large. It took a long time. In addition, although the inspection work is performed according to a certain route, the inspection may be missed, and it is not possible to perform the inspection and inspection work with high accuracy. Furthermore, if you want to compare the collected data with past data, you need to return to the office or central monitoring center, etc., and check the binder that contains the record table of the past data.
Inspection work could not be made more efficient. For this reason, at the time of patrol inspection, information on substation equipment is input to a portable computer and is compiled into a database to monitor and check the status of equipment covering the entire substation equipment, and to create and store inspection records. It is necessary to improve the efficiency of daily operations at substations.

However, an actual portable computer has a limited storage capacity and processing capacity, and it is almost impossible to make a database of all the information of the substation equipment using this portable computer alone. Even a system capable of instructing even a problem solving method called an engineering method (expert system) could not be incorporated into this portable computer.

The present invention has been proposed in order to solve the above-mentioned drawbacks of the prior art. The purpose of the present invention is to improve the work efficiency at the time of patrol inspection, and to make the diagnosis results by the knowledge engineering means of the computer. It is an object of the present invention to provide a highly reliable and efficient patrol inspection system that can detect an abnormality of a device at an early stage by carrying out a patrol inspection with a computer.

(Means for Solving the Problems) In order to achieve the above object, the present invention records patrol inspection data of a substation on a portable computer during on-site patrol, and transmits the data to a host computer to create a database. In the patrol inspection system, only the upper computer has knowledge engineering means, and the portable computer is provided so as not to have a device diagnostic function, and the upper computer has information input from the portable computer. Diagnosis of the device by the knowledge engineering means based on the, the diagnosis result of the device and countermeasures, and is provided so as to be able to transmit past inspection data to the portable computer, the portable computer, the portable computer, The diagnostic results and countermeasures of the equipment transmitted from the computer and the past inspection data are stored and provided so as to be able to be displayed. Duty, be carried out based on the display of the allowed transportable computer, characterized by.

(Operation) According to such a patrol inspection system of the present invention, after transmitting the diagnostic result of the device by the knowledge engineering means of the host computer to the portable computer, the patrol inspection is performed using the portable computer. In addition, the diagnosis result of each device can be seen on site, and abnormality of each device can be found at an early stage.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, the patrol member carries the portable computer 1 as shown in FIG. 2 and travels around the substation premises, and inputs the state of each device to the portable computer 1 as inspection data.
The portable computer 1 is provided with a screen 2 for displaying inspection items and the like, a key input unit 3 for inputting inspection data, and a communication interface 6 for transmitting the input data to the host computer 4. The portable computer 1 and the host computer 4 are detachably connected by a communication cable 5.

On the other hand, the host computer 4 is installed in an office of a substation, a central monitoring center, or the like, and is configured to store data transmitted from the portable computer 1 and create a database. The method of creating a database in the host computer 4 is generally called a knowledge engineering process or an expert system. In each device, past inspection data and the state of each device at the time of outputting the data are stored in association with each other. . The host computer 4 is not limited to past patrol data detected by the variable computer 1, but is also owned by a patrol inspector or operator of a substation, a maker or a researcher of substation component equipment, or the like. Also, empirical or logical knowledge about the relationship between the state of each device and the corresponding detection data is widely accumulated as data.

Therefore, the upper-level computer 4 compares and analyzes the knowledge engineering data with the inspection data from the portable computer 1, and finds out what kind of condition the corresponding device of the inspection data obtained by the portable computer 1 For example, a determination such as "there is a sign of abnormality", "no abnormality", "there is no abnormality at the present time, but a sign of abnormality is seen when left unattended" is made.
In addition, the upper computer 4 merely determines the presence or absence of an abnormality and the necessity of a precautionary measure depending on the type of knowledge engineering data stored therein and the comparative analysis method between the data and the inspection data. Instead, it infers the location of the abnormality, the type of the abnormality, and the cause and countermeasure thereof, and outputs it to the portable computer 1.

In the patrol inspection system of the present invention, a patrol member determines the state of each device at the time of patrol inspection using the above-described components as an example. Hereinafter, this point will be described with reference to the flowchart of FIG. First, the patrol member carries the portable computer 1 as shown in FIG. 2 and patrols the substation yard, and inputs the inspection data indicating the state of each device to the portable computer 1. The inspection data includes, for example, the number of operations of the gas circuit breaker, the gas pressure, the number of operations of the switch of the disconnector, the data of the partial discharge detector, and the like.
FIG. 3A shows an example of a screen when the inspection data relating to the hydraulic pump counter of B) is input to the portable computer 1.
In this way, the patrol member inputs the inspection data for each device to the portable computer 1, and the input inspection data is transmitted to the higher-level computer 4 via the communication cable 5 and the communication interface 6 after completing the inspection. Transmitted.

The tour data of each device transmitted to the computer 4 is stored in a database together with past tour data and other knowledge engineering data already in the computer 4. At the same time, the higher-level computer 4 compares and analyzes the knowledge engineering data and the traveling data of each device, and determines the status of the device that has detected the traveling data. In addition, depending on the content of the knowledge engineering process of the host computer 4, it is determined which part of the device is abnormal and what countermeasures to take.

If the result of the determination is that there is a device with signs of abnormality,
The portable computer 1 is transmitted with the name of the device exhibiting the abnormality and other necessary information (the location of the abnormality and its countermeasures, etc.). Also, for normal equipment, records of past inspection data are transmitted as numerical values or graphs. At this time, the equipment to be checked at the next patrol, the method thereof, or the patrol route can also be output to the portable computer 1.

At the time of the next inspection, the patrol member carries the portable computer 1 storing the information from the computer 4 as described above, and patrols the substation yard according to the route. Then, when the device having an abnormality sign is turned around, the message “the device has an abnormality sign” as shown in FIG. 3B is displayed on the screen 2 of the portable computer 1 as an example. You. The patrol member looks at the abnormal display on the screen and performs a detailed patrol inspection on the device.

In addition, when the computer 4 having the knowledge engineering means as described above infers the points of inspection of the device having the sign of the abnormality and transmits the document to the portable computer 1, By displaying the information on the screen 2 of the portable computer 1 as shown in FIG. 3 (C) as an example when the device reaches the equipment, the patrol member can perform a more detailed inspection. In this case, depending on the contents of the knowledge engineering process of the computer 4, it is possible to display the cause of the abnormality and its countermeasure on the screen of the portable computer 1. In 4,
If an indication of an abnormality is found for a device whose numerical value is indicated, such as the gas pressure of a closed gas insulated device or the number of times the hydraulic pump of a circuit breaker is operated, the numerical value can be changed over time along with an alarm. It can also be transmitted to the portable computer 1. In that case, the portable computer 1 displays the time change of the numerical value on the screen 2 as a graph, as shown in FIG. 3 (D), when the patrol member turns to the device. In this way, the patrol member can know at a glance the history of the past state while knowing that the device has a sign of abnormality.

Of course, even for a normal device, if the above-mentioned past data is transmitted from the host computer 4 to the portable computer 1, the past state can be seen at a glance, and the knowledge engineering data of the computer 4 can be obtained. For example, a skilled patrolman based on past data, which cannot be determined by processing alone, can help determine an abnormal location and its cause based on experience and intuition.

According to the present invention as described above, instead of expanding the storage capacity and processing capacity of the portable computer, it is possible to carry out a patrol inspection with the diagnosis result by the knowledge engineering means of the host computer while using the current portable computer as it is. By doing
Patrols can find abnormal spots early and prevent accidents. In particular, the upper computer 4 having knowledge engineering means infers the points of inspection of the device having the sign of abnormality and sends a documentized version to the portable computer 1, and sends a warning to the corresponding device of the patrol inspection together with an alarm. By displaying the temporal change of the numerical value related to the inspection, more detailed and reliable maintenance inspection work can be performed. Further, by making it possible to simultaneously refer to past data at the time of the patrol inspection, the quality of the maintenance inspection work can be enhanced more than the capability of the host computer 4 by the knowledge engineering means.

(Other Embodiments) The present invention is not limited to the above-described embodiments, and the measurement data from the detection device provided in each device is led online to a higher-level computer of the central monitoring center to perform knowledge engineering. By performing the processing in a proper manner, it is possible to combine a patrol inspection system using a portable computer by a patrol member of the present invention also in a substation provided with a preventive maintenance system for preventing and maintaining abnormalities of each device. In that case, by taking the online measurement data by the preventive maintenance system into the upper computer, the database in the upper computer can be enriched and more reliable inference can be made. When both the preventive maintenance system and the patrol inspection system are used as described above, the preventive maintenance system can be positioned as a higher system of the patrol inspection system, and knowledge engineering means can be included in the preventive maintenance system.

[Effects of the Invention] As described above, according to the present invention, a device having an abnormal tendency is determined using a computer having knowledge engineering means as a host computer, and the contents are transmitted to a portable computer, and then a patrol is performed. To improve work efficiency during patrol inspections,
It is possible to provide a highly reliable patrol inspection system capable of early detection of abnormal equipment.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an example of a patrol inspection system of the present invention, FIG. 2 is a perspective view showing an example of the configuration of a portable computer and a host computer used in the present invention, and FIGS.
(D) is a diagram showing a display example of a portable computer, and FIG. 4 is a plan view showing a configuration of a general substation. 1 ... portable computer, 2 ... screen, 3 ... key input unit,
4 Host computer, 5 Communication cable, 6 Communication interface

Continuation of the front page (72) Inventor Isao Kamada 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (56) References JP-A-59-197962 (JP, A) JP-A-1- 286694 (JP, A) JP-A-1-257218 (JP, A) JP-A-1-238426 (JP, A) JP-A-1-184599 (JP, A) JP-A-1-148022 (JP, A) JP-A-3-107312 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 3/00 G01R 31/02

Claims (1)

(57) [Claims] 1. A patrol inspection system that records inspection inspection data of a substation in a portable computer during an on-site inspection and transmits the data to an upper computer to make a database, wherein only the upper computer uses knowledge engineering means. Having, the portable computer is provided so as not to have a device diagnostic function, the upper-level computer diagnoses the device by the knowledge engineering means based on information input from the portable computer, the A diagnosis result and a countermeasure of the device, and past patrol inspection data are provided so as to be able to be transmitted to the portable computer, wherein the portable computer is configured to transmit the diagnosis result and the countermeasure of the device transmitted from the higher-level computer, and the past. Is provided so that it can be displayed, and maintenance duties such as patrol inspection are performed based on the display of the portable computer. A patrol inspection system.