JP2714331B2 - Operation and maintenance support system for electric stations - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In an electric substation, especially a substation, a gas insulated switchgear (hereinafter, referred to as a G) is required to reduce the installation space of equipment.
IS). Substations belonging to ultra-high voltage systems of 275KV or more than 500KV are required to not only reduce the installation space but also to have higher reliability than conventional aerial devices. The GIS is composed of a bus, a transformer, a circuit breaker, a disconnector, a lightning arrester and the like, all of which are insulated from the outside by gas. In this,
For example, with respect to a gas insulated circuit breaker (hereinafter, referred to as GCB), a gas density sensor and a circuit breaker current sensor have been developed, and it is possible to constantly grasp the situation.

[0003]

The GIS described above
When various sensors are installed in the GIS, abnormalities and signs appearing in the state of the equipment constituting the GIS can be detected, and accidents can be prevented. Against this backdrop, substation operators have a responsibility to ensure the maintenance of their facilities.In particular, it is essential to take the next steps after catching any abnormalities or signs. ing. (1) Judgment of abnormalities / signs from sensor data, and register the relevant equipment as an inspection target without fail. (2) Develop a method of stopping each facility for inspection, and then create a drawing showing the charging / discharging status and hand it over to those engaged in inspection work. On the other hand, the detection levels for abnormalities and signs are set with a margin before the accident, so there is generally no urgency, and it may be sufficient to arrange for inspections within a few days. Many. On the other hand, since the power system reaches the peak of power demand in summer, inspection work is frequently performed just before summer in preparation for this. In this case, the content of the above (2) becomes a heavy burden on the operator. If the above abnormalities / signs occur during such a period, it is possible that leakage will occur if the management is performed only by humans, and as a result, the abnormalities / signs will be overlooked. Furthermore, since the structure of the GIS is very complicated and it takes a long time to create the drawings, and it is fatal to indicate that the equipment is touching or shutting down, it is a heavy burden for the operator to create a charged part confirmation diagram. Becomes The present invention has been made in order to solve the above-described problems, and determines abnormalities / signs from sensor data, registers the applicable equipment as an inspection target, creates an equipment stop procedure for inspection, and performs It is an object of the present invention to provide an operation and maintenance support system for an electric station that can create a confirmation diagram of a charged part of a facility.

[0004]

In order to achieve the above object, an electric station operation / maintenance support system according to claim 1 of the present invention inputs sensor data for monitoring the state of electric station equipment. Means for judging abnormalities and signs, means for registering abnormalities and signs as candidates for inspection, means for giving a scheduled inspection execution date to the candidates for inspection, means for preparing a stop work plan, and stopping Consists of a means for creating an operation procedure table for stopping a candidate to be inspected by giving a system state for executing a work plan, and means for creating a drawing showing the state of charge / discharge of equipment when the operation procedure is executed I do. The electric station operation / maintenance support system according to [claim 2] of the present invention, when outputting as a physical diagram, provides a name of an inspection work plan, a single-line diagram and a bird's-eye view of the entire electric station, and a bird's-eye view of any part of the electric station. The enlarged view and the enlarged side view are printed on a drawing of one or a plurality of sheets.
The electric station operation and maintenance support system according to [claim 3] of the present invention is capable of printing arbitrary line segments and symbols from a display device screen on a bird's-eye view and a single-line connection diagram when outputting as a substantial diagram. It is.

In the system according to the first aspect of the present invention, a gas pressure value, a contact opening operation time, and a current cutoff amount are measured by a sensor for an electric equipment, for example, a GCB. Is input to From the magnitude of the value, the computer system calculates an abnormal value of the device, for example, a wear amount of the contact, a change tendency of the gas pressure, and the like. Next, the occurrence of an abnormality or a sign is determined from the rated value or the characteristic of the device which is given in advance to the device. If it is judged as abnormal or sign,
The device is automatically registered as a candidate for inspection. By giving a date and time to perform inspection work to the registered candidates and making a stop work plan and specifying the grid connection status of the substation at the start, the operation procedure table for stopping the inspection target candidates according to the rules for system operation is automatically set. Created. The result of executing the system operation in accordance with the operation procedure is output as a charged part confirmation diagram. The system according to [Claim 2] of the present invention includes a name of the inspection work result, a single-line connection diagram and a bird's-eye view of the entire electric station, an enlarged bird's-eye view and an enlarged side view of an arbitrary part of the electric station on the output physical diagram. Since the printing is performed, the operator or the worker can work safely while recognizing the state of the device. Since the system according to claim 3 of the present invention can input and print arbitrary line segments and symbols from the display device screen, detailed information accompanying the work can be input, which is more convenient.

[0005]

An embodiment will be described below with reference to the drawings. FIG.
1 is a diagram showing an embodiment of an operation and maintenance support system for an electric substation according to the present invention. Reference numeral 1 denotes a substation system that includes a bus breaker, a transformer, and the like, and is provided with 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 denotes a computer system comprising elements 41 to 48 described below. Reference numeral 41 denotes data input means for constantly inputting data of the substation system 1 and storing the contents in the system status data storage means 46; Abnormality / sign determination means for determining abnormality / sign of the device based on data measured by the sensor and registering the result in the system status data storage means 46;
422 is a means for automatically registering equipment determined to have an abnormality or a sign as a candidate for inspection, 43 is a means for designating a scheduled inspection execution date of the equipment which has become a candidate for inspection, and a means for creating a shutdown work plan, 44 is Means for preparing an initial system of the scheduled inspection execution date, that is, means for creating an operation procedure table for stopping the candidate for inspection of the substation system 1 by designating a system state immediately before starting the inspection and a shutdown work plan; This is a means for designating the position where the inspection work is to be performed from among the procedures shown in the table, and creating a charged part confirmation diagram indicating the charging / discharging state of the substation system. 47 is 43,
The display device is a display device such as a CRT (hereinafter referred to as a CRT) for displaying data created by the respective units 44 and 45, but may be a display device using a liquid crystal other than the CRT, for example. Reference numeral 48 denotes plotters for printing the charged part confirmation diagram as a drawing.

The details of each component and the flow of data between them will be described below. The substation system 1 is, for example, as shown in FIG. Here, there are four buses named A1, A2, Otsu1 and Otsu2, and the circuit breakers CB1, CB2, CB3 and CB4 and the 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 connected to either the busbar A or the second party, the circuit breaker CB034, the disconnectors DS34, DS134, D
Connected by S234. Here, E340 is a grounding disconnector, which is closed when the work is stopped. In FIG. 6, there are a large number of circuit breakers represented by square symbols and many disconnectors represented by round symbols.

The above is an example expressed by a single-line diagram.
In the GIS, these buses, circuit breakers, disconnectors, and the like all have a shape as shown in FIG. 7 in which a case in which insulating gas is sealed is sealed. FIG. 8 is an enlarged view of a part A of FIG. 7, but FIG. 9 is obtained by arranging circuit breakers and disconnectors in a simulated manner. In FIG. 9, a circle indicates a disconnector, a square indicates a circuit breaker, a solid black one indicates a closed circuit, and a white background indicates an open circuit. On the other hand, each equipment is housed in gas compartments separated by a predetermined range, and a gas density sensor is installed in each gas compartment, for example, a gas pressure value is measured once a minute and transmitted to the computer system. Is done. Furthermore,
The circuit breaker is provided with a sensor for measuring a current value at the time of opening of the circuit breaker, and is transmitted to the computer system every time the circuit breaker opens. In addition, a hydraulic pump is provided to maintain the hydraulic level of the opening mechanism of the circuit breaker, and a sensor for measuring the operation time is installed,
For example, the number of minutes during the past 24 hours at a predetermined time every day is counted and transmitted to the computer system. As described above, the substation system 1 includes a main circuit through which electric power flows, such as buses and lines, switches such as circuit breakers and disconnectors, and sensors for measuring gas pressure, current, operating time, and the like.

The processing contents will be described below for each case. Now it determined that occurrence of abnormal-signs, it is assumed that a gas compartment enclosing the breaker CB034 line 1, for example, a packing failure or the like occurs, and reduced gas pressure gradually. As described above, the measured value of the gas pressure is transmitted through the transmitting means 2 and the receiving means 3 to the data input means.
By 41, it is stored in the system status data storage means 46. The abnormality / sign determination means 421 analyzes the change tendency of the gas pressure value for several days and several months, and judges that the insulation performance of the insulating gas has a margin at present, but that it will become inoperable in the near future. It is determined that a sign has occurred. Here, FIG.
The dotted arrow from the data input means 41 to the abnormality / sign determination means 421 indicates the control flow or the data input means.
The solid line from 41 to the system status data storage means 46 indicates the flow of data. The same applies to arrows between other elements.

Automatic registration in the inspection work item table The equipment name determined to be abnormal / indicative is automatically registered as an inspection object candidate in the inspection work item table by the inspection object candidate registration means 422. FIG. 2 shows the system status data storage means 46.
Shows the data structure in the line, and the line 1 CB034 is registered as the equipment name. This inspection work item table is displayed on the CRT 47 by the scheduled inspection execution date designation means 43,
When the operator recognizes the necessity of the inspection work from there, he specifies the scheduled date of the inspection in the work period column according to the degree of urgency, and further indicates that the equipment needs to be stopped to perform the inspection. A setting of work stop is made in the type column. With the above settings, the stop work schedule table shown in FIG. 3 is automatically created. Here, the work content of the line 1 is CB as the stopped device name.
Inspection, period is from 8:00:00 on 92/4/11 to 1
7:00, which indicates that the operation procedure has not been created. Here, an example is shown in which the line 1 is stopped to check the CB034, and the operator determines that the work is to be stopped.

Preparation of Operation Procedure Table The stop work plan table shown in FIG. 3 and the single-line diagram shown in FIG.
Since it is displayed at T47, the user designates the stop work plan No. in FIG. 3 and the state of the substation system immediately before the execution (hereinafter referred to as the initial system). As an example of the initial system, FIG.
The state of was shown. Here, line 1 is connected to two buses with DS23
4, CB034 and DS34. The procedure for stopping the work has a defined sequence, which is automatically generated. There is the following order to stop the work of the line. The line load is cut off by a circuit breaker. That is, the first operation for disconnecting the line is performed by the circuit breaker. Artificially confirm that the tide has disappeared. Release the disconnector on the opposite side of the breaker bus. Release the disconnector on the bus side of the circuit breaker. Artificially check that the line is voltage-free. Turn on the ground. According to the above rules, the operation procedure table creating means 44 automatically creates a procedure for stopping the operation of the line 1 from the initial system shown in FIG. The result is as shown in FIG. 5 and is displayed on the CRT 47.

Preparation and display of charging part confirmation diagram The results of operating the circuit breaker and disconnector according to the operation procedure table of FIG. 5 are reflected in the single-line diagrams of FIGS. Is indicated, for example, as blue. Further, it is superimposed on the GIS outline view (bird's eye view) as shown in FIG. The result is sent from the charged part confirmation diagram
It is displayed on T47 and output to the plotter 48 as a drawing. FIG. 7 shows the entire outer shape of the substation GIS, of which the portion A is as shown in FIG. FIG. 9 shows a charged part confirmation diagram in which switches such as circuit breakers and disconnectors, buses, and the like are superimposed. Hereinafter, the one shown in FIG. 6 is referred to as a single-line connection diagram for the entire substation, the one shown in FIG. 7 is referred to as a bird's-eye view of the entire substation, and the one shown in FIG. 9 is referred to as an enlarged bird's-eye view. As described above, when an abnormality or symptom occurs in the substation system, the candidate for inspection is automatically registered, and based on this, the operation procedure table and the charged part confirmation diagram are automatically created, so that human error Oversight of abnormalities and signs,
It is possible to prevent errors in the reflection in the operation procedure table and errors in the preparation of the charged part confirmation diagram, thereby reducing the load on the operator and improving the safety of inspection work.

In the above-described embodiment, a bird's-eye view of the entire substation is output, and FIGS. 7, 8 and 9 are shown as examples of the charging part confirmation diagram, but as shown in FIGS. 10 (a) and 11 Can also be configured. Fig. 10 (a) is an enlarged view of the side view of the circuit 1, a bird's-eye view, a single-line diagram of the entire substation,
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. 10B, which is an enlarged side view, shows the GIS by displaying the outer shape from the side and overlapping symbols such as a switch and a bus. FIG. 11 shows an example in which each of the above-described drawings is set as another page as one set.
In addition to the above-described embodiment, when performing the inspection stop work, a net indicating a worker's access permitted area, a rope indicating a passage to a work place, a billboard, and the like are arbitrarily drawn from the CRT 47. As shown in FIG. 13, it can also be printed on the charged part confirmation diagram. In FIG. 12, crosses indicate nets,
Parallel lines indicate ropes.

Further, in the above-described embodiment, the decrease in gas pressure has been described as an example of an abnormality / sign. However, the present invention is not limited to this, and equipment corresponding to the following cases may be set as inspection target candidates. . (1) When the current value that breaks when the circuit breaker is opened is measured, the value is converted to the amount of contact wear, and the total is exceeded. (2) When the operation duration of the hydraulic pump for maintaining the oil pressure level of the circuit breaker opening mechanism is measured and the value during a predetermined period exceeds the upper limit. (3) When the operating speed of the opening mechanism of the circuit breaker is evaluated and the value falls below the lower limit. (4) When the insulation performance is evaluated by measuring the leakage current of the surge arrester, and the value falls below the lower limit. (5) When the oil level of the transformer is measured and the value falls below the lower limit. (6) When the components of the gas generated in the oil of the transformer are analyzed and it is judged that there is a sign of insulation deterioration.

[0014]

As described above, according to the electric station operation and maintenance support system of claim 1 of the present invention, when an abnormality occurs at an electric station, the apparatus is registered,
Since the operation procedure at the time of the inspection work is created and the state of charge / discharge after the operation is output as a substantial diagram, there is no oversight of abnormalities / signs and error of reflection on the operation procedure table at the time of the power cut. According to the substation operation / maintenance support system of the present invention, when the charging / discharging state is created on a drawing, the name of the inspection work result, a single-line diagram of the entire substation, a bird's-eye view, an arbitrary Since the bird's-eye view enlarged view, side view, and the like of the portion are shown, the operator and the work on site can work safely. According to the electric station operation and maintenance support system of claim 3 of the present invention, an arbitrary line segment or symbol can be set on the bird's-eye view and the single-line connection diagram. A drawing in which a range or the like is entered can also be output, and further safe work can be performed.

[Brief description of the drawings]

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

FIG. 4 is a diagram showing a single-line 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 diagram of a 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 a portion A in FIG. 7;

FIG. 9 is a diagram showing a charged part confirmation diagram of part A in FIG. 7;

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

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

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

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

[Explanation of symbols]

 1 Substation system 4 Computer system 41 Data input means 421 Abnormality / sign indication determination means 422 Inspection candidate registration means 43 Inspection scheduled date designation means 44 Operation procedure table creation means 45 Charged part confirmation diagram creation means 46 System status data storage means 47 Display device 48 Plotter

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masayuki Kosakata 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (56) References JP-A-2-221874 (JP, A) JP-A-2-32715 (JP, A) JP-A-61-124233 (JP, A) JP-A-63-249425 (JP, A)

Claims (3)

(57) [Claims] 1. A sensor for monitoring the state of a device at an electric station, a first means for determining an abnormality or a sign of the device from an output of the sensor, and the first means determines that there is an abnormality or a sign. In this case, the second means for registering the equipment name as a candidate for inspection, the third means for specifying the scheduled inspection execution date for the registered equipment as the inspection target candidate, and the scheduled inspection execution date are specified. Fourth means for creating an operation procedure table for stopping the equipment, and fifth means for creating a charging / discharging state of the substation equipment after the execution of the operation procedure and illustrating it as a physical diagram. An operation and maintenance support system for electric substations. 2. The fifth means includes: a name of an inspection work plan, a single-line diagram of the whole electric station, a bird's-eye view of the whole electric station, a bird's-eye view enlarged view of an arbitrary part of the electric station, 2. The operation and maintenance support system for an electric substation according to claim 1, wherein the enlarged view of the side view is printed on a drawing of one or 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 displays the set line segment and the symbol in a bird's-eye view. The operation and maintenance support system for an electric substation according to claim 1, wherein the system is printed on the drawing together with the single-line diagram.