JPH0686462A - Operation maintenance support system of electric station - Google Patents

Abstract

PURPOSE:To detect the abnormality and symptom of the equipments of an electric station, to register the abnormality and the symptom as objects to be inspected while preparing facility stop procedure and to output the states of the charging and service interruption of facilities after the execution of stop operation in the operation mainte nance support system of the electric station. CONSTITUTION:A sensor monitoring the states of the equipments of an electric station, a first means 421 deciding the abnormality and symptom of the equipments from an output from the sensor, and a second means 422 registering the name of a facility, in which the presence of abnormality and a symptom is decided, as an object candidate to be inspected when the presence of abnormality and the symptom is decided by the first means are provided. This system is composed of the first means 421, the second means 422, a third means 43 specifying an inspection-execution scheduled date to the facility of the registered object candidate to be inspected, a fourth means 44 preparing an operation procedure table for stopping the facility, the inspection- execution scheduled date of which is assigned, and a fifth means 45 preparing the states of the charging and service interruption of the facility of the electric station after operation procedure is carried out and graphically displaying the states as actual drawings.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric station monitoring and operation / maintenance support system.

[0002]

2. Description of the Related Art In electric power stations, especially substations, gas-insulated switchgear (hereinafter referred to as G
Abbreviated as IS). Substations that belong to ultra-high voltage systems of 275KV and 500KV and above are required to not only reduce the installation space but also to have higher reliability than conventional airborne equipment. The GIS is composed of a bus bar, a transformer, a circuit breaker, a disconnector, a lightning arrester, etc., and all are insulated from the outside by gas. In this,
For example, with respect to a gas insulation breaker (hereinafter referred to as GCB), a gas density sensor and a breaking current sensor have been developed, and it is possible to always grasp the situation.

[0003]

[Problems to be Solved by the Invention] GIS described above
If various sensors are installed in, the abnormalities and signs that appear in the condition of the equipment constituting the GIS can be caught and accidents can be prevented. Against this background, substation operators have an obligation to ensure the maintenance of their equipment, and it is particularly important to take the next step after catching any abnormalities or signs. ing. (1) Judge abnormalities / signs from sensor data and register the relevant equipment for inspection. (2) Plan how to stop each equipment when inspecting, then make a drawing showing the state of charging and shutting down and hand it to the person who is engaged in the inspection work. On the other hand, the detection level of abnormalities / signs is set with sufficient margin before the accident, so in general it is not always urgent, and it may be sufficient to arrange for inspection within a few days. Many. On the other hand, the power system peaks in the summer, and in preparation for this, frequent inspection work is performed immediately before the summer. In this case, the content of (2) above becomes a heavy burden on the operator. If the above abnormalities / symptoms occur during such a period, leakage may occur if only human beings manage them, and as a result, the abnormalities / signs may be overlooked. Furthermore, the construction of the GIS is very complicated and it takes time to create the drawing, and it is also a life-threatening thing that indicates the charging and shutting down of the equipment that the operator touches. Becomes The present invention has been made in order to solve the above-mentioned problem, determines an abnormality / sign from the data of the sensor, registers the corresponding equipment as an inspection target, creates an equipment stop procedure for inspection, and after stop It is an object of the present invention to provide an operation and maintenance support system for an electric station, which is capable of creating a confirmation drawing of the charging part of the equipment.

[0004]

In order to achieve the above object, the operation and maintenance support system for an electric station according to [Claim 1] of the present invention inputs the data of a sensor for monitoring the state of the equipment of the electric station. , A means to judge as abnormality / sign, a means to register the abnormality / sign as an inspection target candidate, a means to give an inspection scheduled date to the inspection target candidate, create a stop work plan, and stop Consists of means for creating an operation procedure table for stopping the inspection target candidates by giving the system status for executing the work plan, and means for creating a drawing showing the charging / discharging status of the equipment when the operation procedure is executed. To do. The operation maintenance support system for an electric station according to [claim 2] of the present invention outputs the name of the inspection work plan, the single-line connection diagram and the bird's-eye view of the entire electric station, and the bird's-eye view of an arbitrary part of the electric station when outputting as a physical map. The enlarged view and the enlarged side view are printed on one sheet or a set of a plurality of sheets.
The operation and maintenance support system for an electric station according to [Claim 3] of the present invention enables arbitrary line segments and symbols to be printed on the bird's-eye view and the single-line connection diagram from the display device screen when outputting as a physical diagram. Is.

In the system according to [Claim 1] of the present invention, the gas pressure value, the contact opening operation time, and the current interruption amount are measured by the sensor for the equipment at the electric station, for example, GCB, and the computer system is used. Entered in. From the magnitude of the value, the computer system calculates an abnormal value of the device, for example, a wear amount of the contact or a change tendency of the gas pressure. Next, the occurrence of abnormality / sign is judged from the rated value or the characteristic of the device given in advance to the device. When judged to be abnormal / sign,
The device is automatically registered as a candidate for inspection. If you give a date and time for inspection work to the registered candidates, make a stop work plan, and specify the grid connection state of the electric station at the start, the operation procedure table that stops the inspection target candidates according to the rules for grid operation is automatically Created. The result of executing the system operation according to the operation procedure is output as a confirmation diagram of the charging unit. In the system according to [Claim 2] of the present invention, the name of the inspection work result, the single line connection diagram and the bird's-eye view of the entire electric station, the bird's-eye view enlarged view and the side view enlarged view of the arbitrary part of the electric station are displayed on the output physical map. Since it is printed, the operator or worker can safely work while recognizing the state of the device. In the system according to [Claim 3] of the present invention, since arbitrary line segments and symbols can be input and printed from the screen of the display device, detailed information associated with work can be input, which is more convenient.

[0005]

Embodiments will be described below with reference to the drawings. Figure 1
1 is a drawing showing an embodiment of an operation and maintenance support system for an electric station according to the present invention, wherein 1 is a substation system including a bus breaker, a transformer, etc., and a sensor for monitoring the state of these devices, Is means for transmitting data measured by the sensor, and 3 is means for receiving the data.
Reference numeral 4 is a computer system composed of elements 41 to 48 described below, 41 is data input means for always inputting data of the substation system 1 and storing the contents in the system state data storage means 46, and 421 is the above Abnormality / sign determination means for judging the abnormality / sign of the device based on the data measured by the sensor and registering the result in the system status data storage means 46,
422 is a means for automatically registering the equipment determined to have an abnormality / sign as an inspection target candidate, 43 is a means for designating the scheduled inspection date of the inspection target equipment, and creating a stop work plan, and 44 is A means for creating an operation procedure table for stopping the inspection target candidate of the substation system 1 by designating the initial system of the scheduled inspection date, that is, the system state immediately before the start of the inspection and the stop work plan, and 45 is the operation procedure It is a means for instructing the position where the inspection work is to be performed from the procedures shown in the table and creating a charging part confirmation diagram showing the charging / discharging state of the substation system. 47 is 43,
Although it is a display device such as a CRT (hereinafter, CRT) that displays the data created by each means of 44 and 45, it may be a display device other than the CRT, for example, using a liquid crystal. Reference numerals 48 respectively show plotters for printing the confirmation drawing of the charging part as a drawing.

The details of each component and the data flow between them will be described below. The substation system 1 is, for example, as shown in FIG. 6 when shown in a single line connection diagram. There are four busbars named Ko1, Ko2, Otsu1, Otsu2, circuit breakers CB1, CB2, CB3, CB4, and disconnector DS1.
1, DS12, DS21, DS22, DS31, DS32, DS4
1, connected by DS42. In this case, a total of eight lines, that is, lines 1 to 8 are connected. For example, the line 1 is either the bus 1 or the Otsu 1, the circuit breaker CB034, the disconnector DS34, DS134, D
It is connected by S234. Here, E340 is a grounding disconnector, which is closed when the work is stopped. In FIG. 6, there are many circuit breakers represented by a square symbol and disconnectors represented by a round symbol, but since they are similar, the description thereof will be omitted.

The above is an example expressed by a single line connection diagram.
In the GIS, these busbars, circuit breakers, disconnectors, etc. all have a shape as shown in FIG. 7, which is sealed in a case in which an insulating gas is sealed. FIG. 8 is an enlarged view of a part of the portion A in FIG. 7, but FIG. 9 is a simulated arrangement of a circuit breaker and a disconnector. In FIG. 9, a circle indicates a disconnector, a square indicates a circuit breaker, a black one indicates a closed circuit, and a white background indicates an open circuit. On the other hand, each facility is housed in a gas compartment divided into a predetermined range, and a gas density sensor is installed in each gas compartment, and, for example, a gas pressure value is measured once a minute and transmitted to a computer system. To be done. Furthermore,
The breaker is equipped with a sensor that measures the value of the current that breaks when the breaker is opened, and is transmitted to the computer system each time the breaker opens. In addition, a hydraulic pump is installed to maintain the hydraulic pressure level of the circuit breaker opening mechanism, and a sensor is installed to measure the operating time.
For example, the number of minutes of operation in the past 24 hours is aggregated at a predetermined time every day and transmitted to the computer system. As described above, the substation system 1 is composed of a main circuit such as a bus and a line through which electric power flows, switches such as a circuit breaker and a disconnector, and sensors for measuring gas pressure, current, operating time and the like.

The processing contents will be described below for each case. Determination of occurrence of abnormality / significant It is now assumed that, for example, a defective packing occurs in the gas compartment in which the circuit breaker CB034 of the line 1 is enclosed, and the gas pressure gradually decreases. As described above, the measured value of the gas pressure is sent to the data inputting means via the transmitting means 2 and the receiving means 3.
It is stored in the system state data storage means 46 by 41. The abnormality / symptom determination means 421 analyzes the change tendency of the gas pressure value for several days and months to determine that the insulation performance of the insulating gas has a margin at present, but will be inoperable in the near future. Determine that symptoms have occurred. Figure 1
The dotted line arrow from the data input means 41 to the abnormality / sign determination means 421 indicates the flow of control, or the data input means
The solid line from 41 to the system status data storage means 46 shows the flow of data. The same applies to arrows between other elements.

Automatic registration in inspection work item table The equipment name determined to be abnormal / sign is automatically registered in the inspection work item table by the inspection target candidate registration means 422 as an inspection target candidate. FIG. 2 shows the system status data storage means 46.
The data structure is shown in the figure. Line 1 CB034 is registered as the equipment name. This inspection work item list is displayed on the CRT 47 by the scheduled inspection date designating means 43,
When the operator recognizes the necessity of the inspection work from there, he / she specifies the scheduled inspection date in the column of the work period according to the degree of urgency and further indicates that it is necessary to stop the equipment for the inspection. The type column is set to stop work. With the above settings, the stop work plan table shown in FIG. 3 is automatically created. Here, as the stop device name, the work content of line 1 is CB
034 Inspection, period from 9:00 on 9/4/11 to 1
It is 7:00, indicating that the operation procedure has not been created. Here, an example is shown in which the operator determines that the line 1 should be stopped in order to inspect the CB034, and the work stoppage is set.

Creation of operation procedure table The stop work plan table shown in FIG. 3 and the single line connection diagram of FIG. 6 are CR.
Since it is displayed at T47, the stop work plan No. in FIG. 3 and the substation system state immediately before executing this (hereinafter referred to as the initial system) are designated. As an example of the initial system, line 1 is shown in FIG.
The state of Here, line 1 has two bus lines, DS23
4, CB034 and DS34 are connected. The procedure for stopping the work has a predetermined order and is automatically generated by this. There are the following sequences to suspend the line. Use a circuit breaker to cut off the load on the line. That is, the first operation of disconnecting the line is performed by the breaker. Artificially confirm that the tide has disappeared. Open the disconnector on the side opposite the busbar of the circuit breaker. Open the disconnector on the bus side of the circuit breaker. Artificially confirm that the line is free of voltage. Attach the ground. According to the above rules, the operation procedure table creating means 44 automatically creates a procedure for stopping the work of the line 1 from the initial system shown in FIG. The result is shown in FIG. 5 and displayed on the CRT 47.

Creation and display of confirmation diagram of charging part The result of operating the circuit breaker and the disconnecting switch according to the operation procedure table of FIG. 5 is reflected in the single line connection diagrams of FIG. 4 and FIG. Is shown in blue, for example. Further, it is superposed on the GIS outline drawing (bird's eye view) as shown in FIG. The result is CR from the charging section confirmation drawing creating means 45.
It is displayed on T47 and is output to the plotter 48 as a drawing. Note that FIG. 7 shows the entire outer shape of the substation GIS, of which the A portion is as shown in FIG. FIG. 9 shows a confirmation diagram of a charging part in which switches such as circuit breakers and disconnectors and busbars are overlapped. Hereinafter, what is shown in FIG. 6 is called a single-line diagram of the entire substation, what is shown in FIG. 7 is called a bird's-eye view of the entire substation, and what is shown in FIG. 9 is called a bird's-eye view enlarged view. As described above, when abnormalities or signs occur in the substation system, inspection target candidates are automatically registered, and the operation procedure table and charging part confirmation diagram are also automatically created based on this, so human error may occur. Oversight of abnormalities / signs,
It is possible to prevent errors in the operation procedure table from being reflected and errors in creating the confirmation drawing of the charging section, and reduce the operator's load and improve the safety of inspection work.

In the above embodiment, a bird's-eye view of the entire substation is output, and FIGS. 7 and 8 and 9 are shown as examples of the confirmation diagram of the charging part, but as shown in FIGS. 10 (a) and 11 It can also be configured to. Fig. 10 (a) is a side view enlarged view, bird's eye view enlarged view, whole substation single-line connection diagram of the substation 1 as a confirmation view of the charging part.
This is an example in which a bird's-eye view of the entire substation is printed as one set on one drawing. Here, FIG. 10 (b), which is an enlarged side view, shows the outline of the GIS as viewed from the side and is made by superimposing symbols such as switches and busbars. Further, FIG. 11 shows an example in which each of the above drawings is set as another page and is set as one set.
Further, in addition to the above-mentioned embodiment, when carrying out the inspection stop work, a net showing the entry permission range of the worker, a rope showing the passage to the work place, a standing tag, etc. are arbitrarily drawn from the CRT 47, and FIG. It is also possible to print on the confirmation drawing of the charging section as shown in FIG. In addition, in FIG. 12, a cross indicates a net,
Parallel line marks indicate ropes.

In the above embodiment, the gas pressure drop is described as an example of abnormality / sign, but the invention is not limited to this, and equipment corresponding to the following cases can be set as the inspection target candidate. . (1) When the current value for breaking the circuit breaker at the time of opening the circuit breaker is measured, and the value is converted to the amount of contact wear and accumulated, and the upper limit is exceeded. (2) When the operation duration of the hydraulic pump for maintaining the hydraulic level of the circuit breaker opening mechanism is measured and the value during the specified period exceeds the upper limit. (3) When the operating speed of the circuit breaker opening mechanism is evaluated and the value is below the lower limit. (4) When the leakage current of the arrester is measured and the insulation performance is evaluated, and the value is below the lower limit. (5) When the oil level of the transformer is measured and the value is below the lower limit. (6) When it is judged that there are signs of insulation deterioration by analyzing the components of the gas generated in the oil of the transformer.

[0014]

As described above, according to the operation maintenance support system for an electric station according to [Claim 1] of the present invention, the device is registered when an abnormality occurs in the device at the electric station.
Since the operation procedure for inspection work is created and the charging / discharging state after the operation is output as a physical diagram, there is no oversight of anomalies / significances and mistakes reflected in the operation procedure table during power outage work. According to the operation maintenance support system for an electric station of [Claim 2] of the present invention, when the charging / discharging state is created in the drawing, the name of the inspection work result, the single line connection diagram of the entire substation, the bird's-eye view, any An enlarged bird's-eye view and a side view of the portion are shown, so that the operator and the work item at the site can work safely. According to the operation maintenance support system for an electric station of [Claim 3] of the present invention, it is possible to set an arbitrary line segment or symbol on the bird's-eye view and the single-line connection diagram, so that access to people involved in inspection work is permitted. It is also possible to output a drawing in which the range, etc. is filled in, which enables further safe work.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment for explaining an operation maintenance support system for an electric station according to the present invention.

FIG. 2 is a diagram showing an inspection work item table according to the present invention. .

FIG. 3 is a diagram showing a stop work schedule according to the present invention.

FIG. 4 is a diagram showing a single line connection diagram of a substation.

FIG. 5 is a diagram showing an operation procedure table according to the present invention.

FIG. 6 is a diagram showing an overall single-line connection diagram of the substation.

FIG. 7 is a diagram showing a bird's-eye view of the entire substation according to the present invention.

FIG. 8 is an enlarged view of part A of FIG.

FIG. 9 is a diagram showing a confirmation diagram of a charging section of section A in FIG. 7;

10A is an output example (arrangement diagram) of the plotter of another embodiment of the confirmation diagram of the charging portion, and FIG. 10B is a diagram showing another embodiment of the enlarged side view.

FIG. 11 is an output example (arrangement diagram) by the plotter of another embodiment of the charging unit confirmation diagram.

FIG. 12 is an output example by a plotter of another embodiment of the confirmation diagram of the charging unit.

FIG. 13 is an output example by a plotter of another embodiment of the confirmation diagram of the charging unit.

[Explanation of symbols]

 1 Substation system 4 Computer system 41 Data input means 421 Abnormality / symptom determination means 422 Inspection target candidate registration means 43 Scheduled inspection date designation means 44 Operation procedure table creation means 45 Charging part confirmation drawing creation means 46 System status data storage means 47 Display 48 plotter

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masayuki Kosakada 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Headquarters Office

Claims (3)

[Claims] 1. A sensor for monitoring a state of a device at an electric station, a first means for judging an abnormality / sign of the device from an output of the sensor, and a first means for judging that there is an abnormality / sign. In that case, the second means for registering the equipment name as an inspection target candidate, the third means for designating the scheduled inspection execution date for the registered inspection target candidate equipment, and the scheduled inspection execution date are specified. Comprising a fourth means for creating an operation procedure table for stopping the equipment, and a fifth means for creating a charging / discharging state of the electric station equipment after executing the operation procedure and illustrating it as a physical diagram. An operation and maintenance support system for electric stations. 2. The fifth means comprises the name of an inspection work plan, a single-line diagram of the entire electric station, a bird's-eye view of the entire electric station, an enlarged bird's-eye view of an arbitrary portion of the electric station, and an optional portion of the electric station. The operation and maintenance support system for an electric station according to claim 1, wherein the enlarged side view is printed on one sheet or a set of a plurality of sheets. 3. The fifth means makes it possible to set an arbitrary line segment and an arbitrary symbol on a bird's-eye view and a single-line connection diagram from a screen of a display device, and the set line segment and symbol can be set in the bird's-eye view. 2. The operation and maintenance support system for an electric station according to claim 1, wherein the drawing is printed together with the single line connection diagram.