JP2002049418A - System for monitoring equipment and method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the function of a system by easily confirming equipment monitor data from a remote place. SOLUTION: A data collecting and transmitting device 1 samples and digital- converts equipment state quantity from a sensor 11 arranged in equipment U to be monitored, and stores it as equipment state quantity data S (t) with an absolute time, and transmits the data S (t) to a communication network 4. A digital type protection controller 2 inputs electricity quantity data E of the equipment U to be monitored and operating state data P of the equipment U, and digital-converts the data, and stores the data as electricity quantity data E (t) with an absolute time and operating state data P (t), and transmits those data E (t) and P (t) to the communication network 4. A data display device 3 receives the data S (t), E (t), and P (t) from the data collecting and transmitting device 1 and the digital type protection controller 2 through the communication network 4, and displays the equipment state of the equipment U to be monitored based on the data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a power plant, a substation,
Alternatively, the present invention relates to a system for monitoring equipment installed in an electric station such as a switchyard.

[0002]

2. Description of the Related Art In general, a power substation is provided with a power switching device for turning on and off a high-voltage main circuit such as a gas-insulated switchgear, and an oil-filled device such as a transformer and a reactor. Such devices are required to have improved reliability, reduced maintenance, prevention of accidents, and early response in the event of an accident. Therefore, monitoring systems for power devices have been proposed for the purpose of satisfying these requirements.

FIG. 17 shows a conventional example of a device monitoring system. This equipment monitoring system detects various physical quantities and chemical quantities of the equipment by a plurality of detecting means 41, and measures outputs of the detecting means 41 by a plurality of measuring means 42.
The measurement data is collected by the measurement data collection device 43, and the measurement data is displayed by the data display device 44.

More specifically, in a conventional device monitoring system, a measurement data collection device 43 and a data display device 44 are provided.
Is installed in the main building of the electric substation, and when data indicating an abnormality sign of the device is measured, the data displayed on the data display device 44 is checked in the main substation of the electric substation. When data indicating an abnormality of the device is measured, the aggregated information of the occurrence of the abnormality is transmitted to the upper-level electric station monitoring device 45 by the contact information, and
5 is notified to a remote control station far away. It should be noted that the data measured by the device monitoring system includes the time data added by the local clock device of the device monitoring system and the measurement data collection device 4.
3 is stored.

[0005] Next, the expected effect of such a device monitoring system will be described with reference to FIG. Here, FIG. 18 is a model diagram of a potential deterioration failure when the vertical axis represents the potential characteristic L of the test sample and the horizontal axis represents the elapsed time t.
In the process of becoming a phenomenon as an accident, the phenomenon progresses at a speed of f when the point f is reached, leading to an accident phenomenon with no time margin. Therefore, it is desirable to find an abnormality in the warning area B at points a to e. The reason is as follows.

That is, since various abnormalities evolve over a long period of time as a physical phenomenon, it takes a considerable time from the warning area B to the point f. Therefore, even if an abnormality is confirmed, if it is in the warning area B, direct emergency processing such as an emergency stop is not necessary, and a time to repair by a spontaneous stop can be obtained, and primary to secondary accident phenomena can be obtained. There are no accident spread phenomena such as secondary damage, and the repair location can be limited to the minimum necessary.

There are two types of measurement data representing the latent characteristic L. That is, there are present value data such as current physical quantity and chemical quantity, and accumulated value data which is a cumulative value of physical quantity and chemical quantity from the past. For example, when a gas insulated switchgear of a substation is to be monitored, the measurement data corresponding to the current value data includes gas pressure, partial discharge charge amount, oil pressure, decomposition gas amount, switch operation time, and the like. The measurement data corresponding to the value data is the contact wear amount of the switch and the like.

[0008] Among them, an example of a device for measuring the amount of contact wear of a switch has been proposed in Japanese Patent Publication No. 14832/1988. The device described in this publication focuses on the fact that the contact wear amount of the circuit breaker is determined by the interrupted current value. FIG. 19 shows the configuration of the conventional device. In FIG. 19, the current value of the main circuit interrupted by the circuit breaker is supplied to an analog input interface 53 via a current transformer 51 and a peak hold circuit 52 provided in the main circuit.
And input to the data processing unit 54.

On the other hand, signals from an operation position detection sensor 55 for detecting the operation position of the circuit breaker and a command current detection sensor 56 provided in the control circuit are sent to a counter 57 to measure the operation time of the circuit breaker. The measured value is input from the digital input interface 58 to the data processing unit 54, and the timing of the circuit breaker operation is input to the peak hold circuit 52. Therefore, of the peak current values detected by the peak hold circuit 52,
The electrode consumption rate can be calculated from the closest peak value at the end of the circuit breaker operation.

[0010]

However, FIG.
In the conventional device monitoring system shown in FIG. First, the measured data can be confirmed by the data display device installed in the main building of the electric substation, but only the aggregated information on the occurrence of abnormalities is transmitted to the upper control station that controls the operation of the equipment. Met. Therefore, when an abnormality is detected in a device at a certain electric station, in order to confirm the detailed information, the maintenance staff goes to the electric station and checks the data displayed on the data display device 44 in the main building of the electric station. I needed to. For this reason,
This has resulted in an increase in the burden on maintenance personnel and delays in response to accidents, resulting in deterioration of the operability of the equipment and, consequently, the economics of the entire equipment.

Further, in the conventional device monitoring system,
The time of the local clock device of the device monitoring system was used to time the measured data. The time data of such a local clock device has poor time accuracy, and has not been synchronized with another system such as a device protection control system. Therefore, it is not possible to accurately analyze changes in the state of the device over time, and it has been difficult to accurately determine the required time after the occurrence of a device abnormality. Further, time-series collation between data measured by the device monitoring system and data measured by another system cannot be performed, and the data cannot be used as analysis data at the time of abnormality detection.

Further, the conventional device monitoring system has been configured as a system independent of a protection control system that performs protection and operation control of devices based on system state quantities.
Therefore, when measuring data related to the life from the operating state quantity data of the device, such as when measuring the contact wear amount of the circuit breaker as shown in FIG. 19, the device monitoring system has its own device. It was necessary to provide a sensor for taking in the operation state quantity data. For this reason, the system becomes redundant and complicated, and the economical efficiency of the system is deteriorated. Nevertheless, there is a limit to the data obtained in the device monitoring system, and there is a limit to the device state determination processing by the device monitoring system.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a device monitoring system for monitoring the status of devices installed in an electric substation. The system functions can be easily checked and the system functions can be improved, which contributes to labor saving of equipment maintenance and easy and quick response in the event of an accident, improving the operability of equipment and systems, thereby improving the overall equipment It is an object of the present invention to provide a high-performance equipment monitoring system that is economical and can improve the economy of the equipment.

A second object of the present invention is to improve the data operability by making it possible to compare the device monitoring data obtained in the system and the data measured by another system in the same time series. The purpose of the present invention is to provide a more sophisticated equipment monitoring system capable of improving the functions of the system and contributing to easier and quicker response in the event of an accident. Further, a third object of the present invention is to make it possible to use the data of another system, thereby simplifying the inside of the system as much as possible and performing a more sophisticated device state determination process. It is to provide a more sophisticated equipment monitoring system that is excellent in performance. Further, a fourth object of the present invention is to monitor equipment installed in a user's electric station, generate some useful consulting data from the monitoring data at the time of maintenance inspection or abnormality, and provide it to the user. It is to provide a business model of the device monitoring method that is possible.

[0015]

In order to achieve the above-mentioned object, the invention according to the first to tenth aspects provides an equipment monitoring system for monitoring the status of equipment installed in an electric substation. It has features.

The first aspect of the present invention is characterized in that the data collection and transmission device and the data display device are connected via a network. The data collection and transmission device is configured to collect data from a sensor attached to the monitored device, convert the data into digital data, and transmit the obtained digital data to the communication network as device monitoring data. The data display device receives, via the communication network, digital data from the data collection and transmission device or digital data generated based on the digital data and indicating information related to the state of the monitored device. And displaying data related to the state of the monitored device in accordance with the digital data.

According to the first aspect of the present invention having such a configuration, device monitoring data obtained by the data collection and transmission device or data related to the state of the monitored device generated based on the device monitoring data is transmitted via the network. It can be confirmed from anywhere by the data display device connected to the device. Therefore, equipment maintenance personnel can easily check equipment monitoring data from a remote location such as a control center without having to go to the site, and can improve the function of the system. It is possible to contribute to the simplification and speeding up of a response at the time of occurrence, and to improve the operability of devices and systems, thereby improving the economics of the entire equipment.

According to a second aspect of the present invention, in the device monitoring system according to the first aspect, the data collection and transmission device comprises:
An absolute time is obtained, the data is digitally converted in accordance with the absolute time, and the obtained digital data is added with the absolute time at the time of sampling. Claim 2 having such a configuration.
According to the invention of the above, since the absolute time is added to the data obtained by the data collection and transmission device, the time required for response after the occurrence of a device abnormality can be determined by accurately analyzing the change in the device state quantity over time. It can be displayed accurately and can be collated with data measured by other systems. Therefore, it is possible to improve data operability and improve the function of the system, thereby contributing to easier and quicker response in the event of an accident.

According to a third aspect of the present invention, in the device monitoring system according to the second aspect, a digital protection control device is further provided. Here, the digital protection and control device takes in the electric quantity data of the system controlled by the monitored device and the operation state data of the monitored device, converts them into digital data, and performs protection control of the system in accordance with the obtained digital data. The digital data is transmitted to the communication network as electric quantity data and operating state data. The digital protection and control device is configured to acquire the absolute time, convert the data into digital data according to the absolute time, and add the absolute time at the sampling time to the obtained digital data. further,
The data display device is configured to provide information related to the state of the monitored device generated based on digital data from the data collection and transmission device and / or digital data from the digital protection and control device via the network. Is received, and data related to the state of the monitored device is displayed according to the received digital data.

According to the third aspect of the present invention, not only the data obtained by the data collection and transmission device via the network but also the digital protection control device constituting the protection control system. It is also possible to take in the obtained data. As described above, by making data of another system available, a more sophisticated device state determination process can be performed. Further, by using data of another system, the inside of the system can be simplified as much as possible, so that it is also excellent in economic efficiency.

According to a fourth aspect of the present invention, in the device monitoring system according to any one of the first to third aspects, the configuration of the communication network and the connection configuration between the communication network and the data collection and transmission device are characterized. It has. That is, the communication network is configured by a first communication network for a local area built in each electric station and a second communication network for connecting a plurality of electric stations in a wide area. Then, the data collection and transmission device is connected to the first communication network using a wire selected from wires including unused wires of the electric cable and wires for the power supply. According to the invention of claim 4 having such a configuration, the device monitoring system of the present invention can be easily introduced by utilizing existing wiring without requiring new wiring work. Therefore, the applicability of the system can be improved, and a low-cost system can be provided, including the cost of installing the system.

According to a fifth aspect of the present invention, in the device monitoring system according to any one of the first to third aspects, the configuration of the communication network and the connection configuration between the communication network and the data collection / transmission device are characterized. Have That is, the communication network is configured by a first communication network for a local area built in each electric station and a second communication network for connecting a plurality of electric stations in a wide area. Then, the data collection and transmission device is connected to the first communication network using wireless communication.
According to a sixth aspect of the present invention, in the device monitoring system according to any one of the first to third aspects, the data collection and transmission device is connected to a communication network using wireless communication. It is. According to the fifth and sixth aspects of the present invention having the above-described configuration, a device monitoring system can be easily introduced without requiring a new wiring operation. Therefore, the apparatus can be installed in any configuration device, and the operability of the system can be improved.

According to a seventh aspect of the present invention, in the equipment monitoring system according to any one of the third to sixth aspects, at least one of a data collection and transmission device, a digital protection control device, and a data display device is provided. One device is configured to generate support data corresponding to an abnormality occurrence part. That is, the at least one device uses at least one of the two types of data of the device monitoring data obtained by the data collection and transmission device and the operating state data obtained by the digital protection control device to control the monitored device. Is configured to specify the abnormality occurrence part and generate support data according to the identified abnormality occurrence part. According to an eighth aspect of the present invention, in the equipment monitoring system according to the seventh aspect, the specification of the abnormality occurrence site includes the specification of at least one of a failure generation gas section and a partial discharge generation site. is there.

According to the seventh and eighth aspects of the present invention, when an abnormality occurs, an abnormality occurrence site such as a faulty gas compartment or a partial discharge occurrence site is identified, and the abnormality occurrence site is determined. The assistance data can be displayed by the data display device. That is, when the support data is generated by the data collection and transmission device or the digital protection and control device, the generated data is sent to the data display device via the communication network and displayed by the data display device. When the support data is generated by the data display device, the data is displayed on the data display device itself. As described above, by displaying the support data corresponding to the abnormality occurrence part such as the failure occurrence gas section or the partial discharge occurrence part by the data display device,
Contribute to further simplification and speedy response in the event of an accident. For example, when data indicating an abnormality occurrence part is generated and displayed as support data, an abnormality occurrence part such as a failure occurrence gas section or a partial discharge occurrence part can be easily confirmed.

According to a ninth aspect of the present invention, in the device monitoring system according to any one of the third to sixth aspects, at least one of a data collection and transmission device, a digital protection control device, and a data display device is provided. One device is configured to generate prediction data according to a prediction value related to functional deterioration of the monitored device.
That is, the at least one device is provided with at least one of two types of data, that is, device monitoring data with absolute time obtained by the data collection and transmission device, and operating state data with absolute time obtained by the digital protection controller. Calculates predicted values of variables related to functional deterioration of monitored equipment using electricity quantity data with absolute time obtained by the digital protection controller, and generates prediction data corresponding to the obtained predicted values. It is configured to
According to a tenth aspect of the present invention, in the device monitoring system according to the ninth aspect, the variables related to functional deterioration include a switch contact wear amount, a load tap changer contact wear amount, a transformer allowable load, and a transformer. It includes at least one of an allowable high load duration and a transformer life.

According to the ninth and tenth aspects of the present invention, the data display device can display the prediction data corresponding to the predicted value of the variable related to the function deterioration of the monitored device. For example, when a predicted value such as a switch contact wear amount, a load tap switch contact wear amount, and a transformer allowable load is calculated, based on the obtained predicted value, a switch or a load tap switch, It is possible to predict the time of inspection of a transformer or the like. In this case, the maintenance and inspection work can be rationalized, and the economy of the entire system including the monitored device can be improved. In addition, when a predicted value such as an allowable load that does not impair the life of the transformer or an allowable high load duration that does not impair the life of the transformer with a desired load is calculated, the efficiency of the transformer is reduced. Can drive well.

The invention according to claims 11 to 14 is
A device monitoring method for monitoring a state of a device installed in a user's electric station and generating necessary data has the following technical features.

[0028] The invention described in claim 11 has the following steps. First, a step of prompting a user to input performance identification information including a rating of a monitored device, a step of receiving device monitoring data of the monitored device, and a process of receiving electric quantity data of a system controlled by the monitored device And Further, based on the performance identification information input by the user, the basic performance data of the monitored device is obtained by referring to the device database, and the function of the monitored device is obtained based on the basic performance data and the received electric quantity data. Calculating a predicted value of a variable related to deterioration and generating prediction data according to the obtained predicted value.

According to a twelfth aspect of the present invention, in the device monitoring method according to the eleventh aspect, the step of generating the prediction data is performed based on the obtained basic performance data and the received electric quantity data for the monitored device. Calculating, as a predicted value, an accumulated value of items determined according to the monitored device from among switch contact wear amount, load tap changer contact wear amount, and transformer life, and the calculated accumulated value Generating inspection time prediction data for the monitored device based on the acquired basic performance data.

An eleventh and a twelfth aspect having such a configuration.
According to the invention, it is possible to provide the user with prediction data according to the predicted value of the variable related to the function deterioration of the monitored device of the user. In particular, as variables relating to functional deterioration, predicted values such as a switch contact wear amount, a load tap changer contact wear amount, and a transformer allowable load are calculated and calculated as claimed in claim 12. Furthermore, inspection time prediction data of a switch, a load tap changer, a transformer, and the like is generated based on and provided to the user, so that the maintenance and inspection work of the user can be rationalized. Also, by generating prediction data such as an allowable load that does not impair the life of the transformer or an allowable high load duration that does not impair the life of the transformer by a desired load amount, and providing the prediction data to the user, The user can operate the transformer efficiently using the prediction data. Therefore, it is not necessary for the user to perform various types of data analysis related to the functional degradation and operation efficiency of the equipment, and to manage the equipment database required for such data analysis. The burden is greatly reduced.

[0031] The invention according to claim 13 has the following steps. First, a step of prompting a user to input performance identification information including a rating of a monitored device, a step of receiving device monitoring data of the monitored device, and a step of receiving operating state data of the monitored device, Have. Further, based on the performance identification information input by the user, the basic performance data of the monitored device is obtained by referring to the device database, and based on the basic performance data and the received operation state data, the abnormality of the monitored device is obtained. Generating a support data corresponding to the specified abnormality occurrence part.

According to a fourteenth aspect of the present invention, in the device monitoring method according to the thirteenth aspect, the step of generating the support data includes the step of generating the support data based on the obtained basic performance data and the received operating state data. And generating support data indicating at least one of availability of operation continuation, a recovery operation procedure, and an abnormality occurrence cause based on the obtained basic performance data and the identified abnormality occurrence section. It is characterized by including a step.

Claims 13 and 14 having such a configuration.
According to the invention, when an abnormality occurs in the monitored device of the user,
By specifying an abnormality occurrence site such as a failure occurrence gas section or a partial discharge occurrence site, and providing the user with support data corresponding to the identified abnormality occurrence site, it is possible to contribute to easier and quicker response in the event of an accident. . For example, when data indicating an abnormality occurrence site is provided to the user as the support data, the user can easily confirm the abnormality occurrence site such as the failure occurrence gas section and the partial discharge occurrence site. Therefore, the user is not required to perform various types of data analysis to identify the location where an abnormality has occurred, or to manage the equipment database required for such data analysis, so the burden of detecting and recovering from an accident is reduced. Is greatly reduced. In particular, as described in claim 14, by providing to the user support data indicating at least one of availability of operation continuation, a recovery operation procedure, and a cause of abnormality,
It is possible to contribute to further simplification and speeding up of a response at the time of occurrence of an accident, and it is possible to further reduce a user's burden related to abnormality detection and accident recovery.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plurality of embodiments to which an apparatus monitoring system and a method thereof according to the present invention are applied will be described below in detail with reference to FIGS.

[First Embodiment] [Configuration] FIG. 1 is a block diagram showing the configuration of a device monitoring system according to a first embodiment. As shown in FIG. 1, the device monitoring system according to the first embodiment has a data collection and transmission device 1, a digital protection and control device 2, and a data display device 3 connected via a communication network 4. is there. Hereinafter, the configuration of each of the devices 1 to 3 will be sequentially described.

First, the data collection and transmission device 1 is disposed near the monitored device U, and samples a device state value from the sensor 11 disposed on the monitored device U to obtain a digital device state value. Monitoring data conversion means 12 for converting the data into data S, monitoring data storage means 13 for storing the digital device status data S, and data transmitting / receiving means for transmitting the stored device status data S to the communication network 4 14 is provided.

The data collecting and transmitting apparatus 1 further converts a signal transmitted from an artificial satellite L equipped with a primitive clock into a GP signal.
G which receives and decodes through S (Global Positioning System) receiving antenna 15a and recognizes accurate absolute time t
A PS receiver 15 is provided, and the monitor data converter 12 and the monitor data storage 13 are operated according to the absolute time t received by the GPS receiver 15.

That is, the monitoring data conversion means 12 is adapted to sample the device state quantity from the sensor 11 according to the absolute time t and convert it into digital device state quantity data S. Then, the monitoring data storage means 13
For the digital device state quantity data S,
The absolute time t at the time of sampling is added and stored as device state quantity data S (t) with the absolute time. Therefore, the data transmitting / receiving means 14 transmits the device state quantity data S (t) with the absolute time to the communication network 4.

Next, the digital protection and control device 2 is disposed near the monitored device U, and receives the system electric quantity data E and the operation state data P of the device U as input and converts the operation data into digital data. Conversion means 22 and its digital electric quantity data E and operating state data P
And data transmission / reception means 24 for transmitting the stored electric quantity data E and operation state data P to the communication network 4.

The digital protection and control device 2 further includes a GPS receiving antenna 25a and a GPS receiving unit 25, like the data collection and transmission device 1.
The operation data conversion unit 22 and the operation data storage unit 23 are operated according to the absolute time t received by the PS reception unit 25.

That is, the operation data conversion means 22 receives the electric quantity data E of the system and the operation state data P of the equipment U and converts them into digital data in accordance with the absolute time t. Then, the operation data storage means 2
3 adds the absolute time t at the time of input to the digital electric quantity data E and the operating state data P, respectively, so that the electric quantity data E (t) with the absolute time and the operating state data P ( t). Therefore, the data transmitting / receiving means 24 transmits the electric quantity data E (t) with the absolute time and the operating state data P (t) to the communication network 4.

Further, the data display device 3 includes a data transmitting / receiving means 31 for transmitting / receiving data via the communication network 4, a data display means 32 for displaying data, an input unit such as a keyboard and a mouse, and a display. An input / output unit 33 including an output unit. The data transmission / reception means 31 includes the device state quantity data S (t) with the absolute time transmitted from the data transmission / reception means 14 of the data collection / transmission apparatus 1 and the data transmission / reception means 24 of the digital protection control apparatus 2. The obtained electric quantity data E (t) with absolute time and the operating state data P (t) are
The receiving process is performed via the communication network 4. Further, the data display means 32 displays the monitored device based on the device state quantity data S (t) with absolute time, the electric quantity data E (t), and the operation state data P (t) received by the data transmitting / receiving means 31. The device status of U is displayed.

[Operation and Effect] In the first embodiment configured as described above, the following operation and effect can be obtained. First, in the present embodiment, the network 4
, The device state quantity data S (t), the electric quantity data E (t), and the operation state data P (t) of the monitored device U can be confirmed in real time. That is, the data display device 3 connected to the communication network 4 allows the user to check the detailed state quantity of the device U, which could be checked only near the device U in the past, from anywhere.

Therefore, even if the equipment maintenance staff does not go to the site, the equipment monitoring data can be easily confirmed from a remote place such as a control center, and the function of the system can be improved. Therefore, it is possible to contribute to labor saving of equipment maintenance, easy and quick response in the event of an accident, and to improve operability of equipment and systems, thereby improving economical efficiency of the entire equipment. .

Further, since the absolute time is added to the device state quantity data, it is possible to accurately analyze the change in the device state quantity over time to accurately display the time required for response after the occurrence of the device abnormality. Enabled, and can be collated with data measured by other systems. Therefore, it is possible to improve data operability and improve the function of the system, thereby contributing to easier and quicker response in the event of an accident.

In particular, in the present embodiment, not only the device state quantity data S (t) obtained by the data collection and transmission device 1 via the communication network 4 but also the digital protection control constituting the protection control system Device state quantity data S (t) and electric quantity data E obtained by the device 2
(T) Since the operation state data P (t) is also used, a more sophisticated device state determination process can be performed as compared with the case where only the apparatus state amount data S (t) is used.

In this case, since all of the data are data with absolute time, it is possible to accurately synchronize the data collection and transmission device 1 with the digital protection and control device 2 to perform data collation between the devices 1 and 2. Is possible, thereby
For example, it is possible to perform advanced device monitoring processing such as specifying an abnormality occurrence part. In addition, by using the data of the digital protection and control device 2 constituting another system,
Since the inside of the device monitoring system can be simplified as much as possible, it is also economical.

[Modification] In this embodiment,
The example in which the GPS receiving unit 15 and the digital protection and control device 2 are used as constituent elements has been described.
One or both of the GPS receiver 15 and the digital protection controller 2 may be omitted.

[Second Embodiment] [Configuration] FIG. 2 is a block diagram showing the configuration of a device monitoring system according to a second embodiment. In FIG. 2, the same components as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 2, in the equipment monitoring system according to the second embodiment, in addition to the configuration of the first embodiment, the communication network 4 (A first communication network) 4a and a wide area communication network (a second communication network) 4b. In the figure, reference numeral 5 denotes a router for connecting the LAN 4a in the substation and the wide area communication network 4b.
Furthermore, the data collection and transmission device 1 and the LAN 4
The transmission path medium 6 for connecting a with the communication line 7 is constituted by unused wiring of an electric cable, power supply wiring, or a wireless communication interface 7.

[Operation and Effect] In the second embodiment having the above configuration, the following operation and effect can be obtained in addition to the operation and effect of the first embodiment. That is, in the present embodiment, the data collection and transmission device 1 is connected to the existing electric cable or power supply cable connected to the device U, or wirelessly, and the communication interface 7.
Can transmit data to the LAN 4a in the power plant.

Therefore, it is not necessary to lay another cable just for the installation of the data collection and transmission device 1, so that it is possible to reduce the number of connection cables in the electric power plant. As a result, the equipment monitoring system can be simplified, so that the economy can be improved. Furthermore, when the present device monitoring system is applied to existing equipment, it is not necessary to lay new cables, so the work of laying the device monitoring system can be rationalized and shortened, which is economical. .

[Third Embodiment] [Configuration] FIG. 3 is a block diagram showing the configuration of a device monitoring system according to a third embodiment. In FIG. 3, the same components as those in the second embodiment shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 3, in the device monitoring system according to the third embodiment, in the configuration of the second embodiment, instead of the data collection and transmission device 1 being connected to the in-house LAN 4a,
It is directly connected to the wide area communication network 4b by the wireless communication path 8 and the communication interface 7.

[Operation and Effect] In the third embodiment having the above configuration, the following operation and effect are obtained in addition to the operation and effect of the first embodiment. That is, in the present embodiment, data can be directly transmitted from the data collection and transmission device 1 to the communication network 4 via the wireless communication path 8 and the communication interface 7.

Therefore, in the electric station, by installing only the data collection and transmission device 1, the equipment monitoring system can be easily configured, and it is not necessary to lay another cable. The number of cables can be reduced. As a result, the equipment monitoring system can be simplified, so that the economy can be improved.
Furthermore, when the present device monitoring system is applied to existing equipment, it is not necessary to lay new cables, so the work of laying the device monitoring system can be rationalized and shortened, which is economical. .

[Fourth Embodiment] [Configuration] In a fourth embodiment, in the configuration of the second or third embodiment shown in FIG. 2 or FIG. (Electrical plant premises LAN
4a) or the frequency band of wireless communication for transmitting data to the wide area communication network 4b) is 800 MHz to 2.5 GHz.
It is characterized by being in the range of z.

[Operation and Effect] In the fourth embodiment having the above configuration, the following operation and effect can be obtained in addition to the operation and effect of the second or third embodiment. First, Fig. 4 shows that 1000MHz
This is an example of measuring the level of noise in a substation in the region up to. (Source: IEEE Transaction on Power Delive
ry, Vol.9, No.2, April 1994) As is clear from this figure, in substations, the frequency of the discharge phenomenon caused by air dielectric breakdown is 600-800 MHz or less. It can be seen that the noise level is low in the high frequency region.

Therefore, in the present embodiment, since data is transmitted from the data collection and transmission device 1 in the substation using the radio frequency of the frequency band of 800 MHz or higher with a low noise level in the substation, the data transmission is efficient. It can be performed. In the present embodiment,
Since wireless communication in the frequency band of 2.5 GHz or less is used, the system can be configured using general-purpose communication means. As a result, high reliability of the device monitoring system can be realized and the cost can be reduced.

[Fifth Embodiment] [Configuration] FIG. 5 is a gas system diagram showing a configuration of a gas insulated switchgear which is a monitored device U of a device monitoring system according to a fifth embodiment. 13 is a flowchart showing an outline of a processing procedure according to the fifth embodiment. The fifth embodiment is different from the first embodiment shown in FIG.
The data display device 3 is configured to identify a part where an abnormality has occurred in a device by using both or one of the data from the data collection and transmission device 1 and the data from the digital protection and control device 2.

[Operation and Effect] In the fifth embodiment having the above-described configuration, it is possible to specify the abnormality occurrence site of the monitored device U. In the following, the process of identifying an abnormality occurrence part according to the present embodiment will be described, taking as an example the case where the monitored device U is the gas insulated switchgear shown in FIG.

First, FIG. 5 is a gas system diagram showing one line of a typical gas insulated switchgear. A gas insulated switchgear is a device in which a switch is configured in a closed container in which an insulating gas is sealed. In one line of equipment, the gas charging section is managed as a plurality of gas sections. In FIG. 5, it is divided into four gas sections G1 to G4. When a ground fault occurs inside such a gas insulated switchgear, in the conventional device monitoring system, the fault occurrence part is specified for each gas section by the gas pressure sensors S1 to S4 provided for each gas section. It was possible, but no more detailed location could be identified.

On the other hand, in the device monitoring system according to the present embodiment, when a failure occurs in the device, the data display device 3 shown in FIG. 1 performs a series of processes shown in FIG. It is possible to specify a detailed failure occurrence site. In the following, an outline of the procedure for specifying the failure site will be described with reference to the flowchart of FIG.

First, the data display device 3 executes Step 10
1, the device state quantity data S (t) transmitted from the data collection and transmission device 1 is received. Subsequent step 102
In the case where it is determined that the data received by the reception processing in step 101 is the failure point detection data,
The data display device 3 proceeds to step 103 and receives the operating state data P (t) before the detection of the fault point transmitted from the digital protection and control device 2. The processing up to this point will be specifically described with reference to the gas system diagram shown in FIG. 5. When a ground fault is detected in the gas section G4, data indicating the occurrence of a failure in the gas section G4 is received in step 101. Then, in step 103, information on the ON / OFF state of each switch before the occurrence of the failure is received.

Next, the data display device 3 executes Step 10
4, the data of the device configuration stored in advance,
Operating state data P obtained in step 103
(T) is used to calculate the power application unit of the device. Further, based on the power application unit data calculated in step 104, a failure occurrence site is specified in step 105, and in step 106, the specified failure occurrence site is displayed on the screen.

By the above-described series of processing, the failure occurrence site can be confirmed on the data display device 3 in detail. Therefore, according to the present embodiment, the function of the device monitoring system can be enhanced, and it is possible to contribute to easier and quicker response in the event of an accident.

[Modification] In this embodiment,
Although the data display device 3 is configured to perform the process of identifying the abnormality occurrence part, the present invention is not limited to this configuration. That is, as a modified example of the present embodiment, it is also possible to perform a process of specifying an abnormality occurrence part by the data collection and transmission device 1 or the digital protection and control device 2 and send out the abnormality occurrence part data to the communication network. It is clear that the same effects as those of the present embodiment can be obtained in those configurations.

[Sixth Embodiment] [Configuration] FIG. 7 is a flowchart showing an outline of a processing procedure according to a sixth embodiment. The sixth embodiment is shown in FIG.
In the configuration of the first embodiment, the data display device 3 uses the data from the data collection and transmission device 1 and / or the data from the digital protection and control device 2 to predict the inspection time of the equipment. It is configured to perform an operation.

[Operation and Effect] In the sixth embodiment having the above configuration, the data display device 3 can predict the inspection time of the monitored device U.
In the following, a case where the monitored device U is the gas insulated switchgear shown in FIG.

First, as shown in FIG. 5, the gas insulated switchgear is composed of a plurality of switches. Items that affect the timing of inspection of the switch include the amount of wear of the switch contact. As described above, the amount of wear of the switch contacts is determined by the interrupted current value. Therefore, if the current flowing before and after the operation of the switch can be detected, the amount of contact wear can be calculated. In the device monitoring system according to the present embodiment, the data display device 3 shown in FIG. 1 performs a series of processes shown in FIG. 7 so that the amount of wear of the switch contact can be calculated. Can be predicted. In the following, an outline of an inspection time prediction calculation processing procedure by the data display device 3 will be described with reference to the flowchart of FIG.

First, the data display device 3 executes step 11
1, the device state quantity data S (t) transmitted from the data collection and transmission device 1 is received. Subsequent step 112
In the case where it is determined that the data received by the receiving process in step 111 is the switch operation data,
The data display device 3 proceeds to step 113 and receives the electric quantity data E (t) before and after the switch operation transmitted from the digital protection and control device 2. More specifically, the current value of the switch is received.

Next, the data display device 3 executes step 11
In step 4, the amount of wear of the switch contacts in the operation is calculated from the current values before and after the switch operation received in step 113. Further, based on the contact wear amount data calculated in step 114, step 11
In step 5, the wear amount data is added to the accumulated value up to that point, and in step 116, the switch inspection time is calculated. In step 117, the calculated inspection time is displayed on the screen.

By the above-described series of processes, the inspection time of the gas insulated switchgear as the monitored device can be easily confirmed on the data display device 3. Therefore, according to the present embodiment, the function of the device monitoring system can be further enhanced, and the maintenance and inspection work can be rationalized. Therefore, the economy of the entire system including the monitored device can be improved. be able to.

[Modification] In this embodiment,
Inspection time prediction calculation processing was performed by the data display device 3, but the present invention is not limited to this configuration. That is, as a modified example of the present embodiment, it is also possible to perform the inspection time prediction calculation processing by the data collection and transmission device 1 or the digital protection and control device 2 and send the data to the communication network as inspection time data. It is clear that the same effects as those of the present embodiment can be obtained in those configurations.

[Seventh Embodiment] [Configuration] FIG. 8 is a block diagram showing the configuration of a device monitoring system according to a seventh embodiment. In FIG. 8, the same components as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 8, the device monitoring and monitoring system according to the seventh embodiment
The maintenance support system is provided with an independent equipment data server 9, and this equipment data server 9 is connected via a communication network 4 together with a data collection and transmission device 1, a digital protection and control device 2, and a data display device 3. is there.

The device data server 9 includes a data transmission / reception unit 91 and a processing unit 92, and also includes a device data recording file 93 and a device characteristic data file 94 as data files. The data transmission / reception means 91 includes the device state quantity data S with the absolute time transmitted from the data transmission / reception means 14 of the data collection / transmission apparatus 1.
(T) and the electric quantity data E with absolute time transmitted from the data transmission / reception means 24 of the digital protection and control device 2.
(T) and the operating state data P (t) are received through the communication network 4. Then, the processing means 92 receives the received device state amount data S (t), electric amount data E (t), operation state data P (t), and basic performance data and device configuration data in the device characteristic data file 94. Is used to perform the device monitoring / maintenance support calculation, save the result in the device data recording file 93, and notify the data display device 3 as necessary.

Here, the device data recording file 93 is
This is a file for storing and accumulating the recording data of various devices calculated by the processing means 92. The device characteristic data file 94 includes device configuration data related to the configuration of the device,
Stores general basic performance data that is not limited to the target substation, such as equipment characteristic data that shows various coefficients that differ depending on the equipment characteristics, and equipment inspection correlation data that shows the correlation between equipment characteristic data and the time when equipment inspection is required. As well as performance identification data, system data, etc.
This is a file for storing substation configuration data specific to the target substation.

Note that such a device data server 9
Although it is possible to provide a single user as a dedicated data server, in general, a plurality of users' electric stations are monitored, necessary data is generated, and the generated data is provided to each user. It is configured as a service center. Therefore, in the figure, only the device data server 9 and the data collection and transmission device 1, the digital protection and control device 2, and the data display device 3 of a single user are connected.
Actually, similar devices 1 to 3 are respectively connected to a plurality of users. Accordingly, data for each user is recorded in the device data recording file 93, and general basic performance data for each device is stored in the device characteristic data file 94 as data common to a plurality of users. Is recorded, as well as individual substation configuration data for substations for each user.

The device configuration data of each user recorded in the device characteristic data file 94 is transmitted from the device data server 9 to the data display means 32 of the user data display device 3 for inputting device configuration data. The input support screen is transmitted, and the user is input by inputting the performance identification data, system data, and the like of each device constituting the electric power station through the input / output unit 33 of the data display device 3 while viewing the input support screen. In this case, the performance identification data of each device includes the name of the device, the rated voltage, the rated current, and the like. including.

[Operation] [Outline of Processing Procedure] FIG. 9 shows the data collection and transmission apparatus 1 and the digital protection control until the equipment monitoring / maintenance support data is recorded in this system having the above configuration. 9 is a flowchart illustrating an outline of a data processing procedure in the device 2 and the device data server 9.

As shown in the figure, first, the data collection / transmission device 1 inputs the device state quantity data by the monitoring data conversion means 12 at a predetermined time or every time an operation occurs (step 201). GP to state quantity data
The time obtained by the S receiving unit 15 is added and temporarily stored in the monitoring data storage unit 13 (step 202). Data is determined based on a preset transmission condition, and if it is the data transmission timing (YES in step 203), the data collection and transmission apparatus 1
The device status data is transmitted (step 20).
4). In parallel with this, in the digital protection and control device 2 as well, the operation data conversion means 22 inputs the system electric quantity data and the equipment operation state data at a predetermined time or each time an operation occurs (step 301), and the input. The time obtained by the GPS receiving unit 25 is added to these data, and the data is temporarily stored in the operation data storage unit 23 (Step 302).

Next, the device data server 9 executes step 2
When the device state quantity data transmitted in step 04 is received (step 401), and it is determined that arithmetic processing is necessary based on the type of the received data (YE in step 402).
S), a request is made to the digital protection and control device 2 for transmission of the system electric quantity data and the equipment operation state data at the time (step 403). Digital type protection controller 2
Receives this data (YE in step 303).
S), the data stored in the operation data storage unit 23 is transmitted to the device data server 9 (Step 30).
4). The equipment data server 9 receives this data (step 404) and uses these equipment state quantity data, system electric quantity data, equipment operation state data, and data in the equipment characteristic data file 94 to support equipment monitoring and maintenance. The calculation is performed (step 405), and the calculation result is stored in the device data recording file 93 (step 406). Further, when it is necessary to notify the data display device 3 of the calculation result (YES in step 407), the data display device 3 is notified (step 408).

[Processing Procedure for Calculating Switch Inspection Timing] More specifically, in the present system, the equipment data server 9
Thus, the inspection time of the monitored device U can be predicted. In the following, a case where the monitored device U is the gas insulated switchgear shown in FIG.

First, as described above, the amount of wear of the switch contact, which is an item that determines the timing of inspection in the switch, is determined by the interrupted current value, as described above. If the current values before and after can be detected, the wear amount of the contact can be calculated. In the device monitoring system according to the present embodiment, by performing a series of processes shown in FIG. 10 by the device data server 9 shown in FIG. Can be predicted.
In the following, an outline of the inspection time prediction calculation processing procedure by the equipment data server 9 will be described with reference to the flowchart of FIG.

First, the device data server 9 executes step 5
At 01, the device state quantity data S (t) transmitted from the data collection and transmission device 1 is received. Next step 50
If it is determined in step 2 that the data received by the reception processing in step 501 is the switch operation data, the equipment data server 9 proceeds to step 503 and instructs the digital protection control device 2 to perform the operation before and after the equipment operation. , And in step 504, the electric quantity data E (t) before and after the switch operation is received. More specifically, the current value of the switch is received.

Next, the device data server 9 executes step 5
At 051, the device characteristic data file 94 is referred to, a contact wear coefficient indicating the relationship between the contact wear amount of the switch and the switching current, and a device inspection correlation indicating a correlation between the contact wear amount of the switch and the inspection required time. Get the data. next,
In step 5052, the amount of contact switch wear in the operation is calculated using the electrical quantity data E (t) received in step 504 and the contact wear coefficient acquired in step 5051. Further, based on the contact wear amount data calculated in step 5052, the wear amount data is added to the accumulated value up to that point in step 5053, and in subsequent step 5054, the contact wear accumulated value, the equipment inspection correlation data, The inspection time of the switch is calculated from the operation history data up to and the calculated inspection time is stored in the device data recording file 93 in step 506.

Further, in step 507, when the inspection time is within the preset period from the present time, the equipment data server 9 notifies the data display device 3 in step 508. In the notified data display device 3,
By referring to the device data recording file 93 of the device data server 9 via the communication network 4, it is possible to confirm detailed inspection time data of the switch.

[Processing Procedure for Calculating Inspection Timing of Load Tap Changer] Hereinafter, a load tap changer (hereinafter referred to as LTC) in which the monitored device U is provided in a transformer of a power transmission and distribution system as shown in FIG. An example of the case will be described with reference to FIG. Figure 1
As shown in FIG. 1, the LTC provided on the transformer tap winding 62 connected to the transformer main winding 61 includes a tap selector 63 for selecting a tap drawn from the tap winding in a no-load state, It comprises a switching switch (hereinafter also referred to as DS) 64 for switching the load current of the transformer and the bridging current between taps.

The contact group of the DS64 gradually wears out every time tap switching is performed. In the case of the resistance type LTC, a problem called unbalance wear of the DS contact may occur, and diagnosis of this problem has been conventionally performed. Note that there are two-resistance type LTCs and four-resistance type LTCs, and FIG. 11 shows a two-resistance type LTC as an example.
5 is a circuit diagram schematically showing the principle of the present invention. In the figure, reference numeral 65 denotes fixed contacts corresponding to each tap of the transformer tap winding 62, and 71 to 71.
76 is each contact point of the LTC, and 77 is a current limiting resistor. Here, from the viewpoint of simplification of the description, the unbalanced wear phenomenon in the case of the two-resistor type and its diagnostic method will be described. However, the basic diagnostic method is the same for the four-resistance type and the like.

The circuit of the currently energized tap is called side A, and the circuit of the tap to be connected next is called side B. In FIG. 11, the A-side movable contact 71
A parallel circuit of a main contact 73 and a resistance contact 74 on the A side is connected in series, and a parallel circuit of a resistance contact 75 and a main contact 76 on the B side is connected in series to the movable contact 72 on the B side. A current limiting resistor 77 is connected in series to the A-side resistance contact 74 and the B-side resistance contact 75, respectively. Then, the A-side movable contact 71 of the tap selector 63 is turned on to the fixed contact 65 corresponding to the currently energized tap, and the A-side circuit 73 is turned on by turning on the A-side main contact 73. is there.

In this state, the procedure for switching the tap from the A side to the B side is as follows. When an electric operating mechanism (not shown) of the LTC starts, (1) the B-side movable contact 72 of the tap selector 63 moves off the fixed contact 65 and moves to another fixed contact corresponding to the tap to be connected next. 65. At this time, the B side is not energized. (2) The A-side resistance contact 74 of the DS 64 is turned on. (3) The A-side main contact 73 of the DS 64 is pulled off. (4) The B-side resistance contact 75 of the DS 64 is turned on. (5) The A-side resistance contact 74 of the DS 64 is pulled off. (6) The B-side main contact 76 of the DS64 is turned on. (7) The B-side resistance contact 75 of the DS 64 is pulled off, and the switching operation of one tap is completed.

In such a tap switching process, DS
Each of the contacts 73 to 76 is worn out.
6 and the resistance contacts 74 and 75 have different aspects. That is, the amount of wear of the main contacts 73 and 76 varies depending on the load current at the time of tap switching, and the wear proceeds in proportion to the square of the load current. On the other hand, the amount of wear of the resistance contacts 74 and 75 is less affected by the load current value than the main contacts 73 and 76, and shows a constant consumption tendency. DS
Are usually designed so that each contact is consumed evenly when the transformer is operated near the rated current. A phenomenon that the contact is worn out faster than the main contact may occur. This is called contact unbalance wear.

Although the description of the mechanism is omitted, the switching time between (3) and (4) in the switching procedure is reduced as the consumption amount of the resistance contact becomes larger than the consumption amount of the main contact. Become. If this switching time becomes significantly shorter,
A situation occurs in which the current interruption is not performed normally. In order to perform the switching reliably, it is necessary to turn on the B-side resistance contact 75 after a lapse of a half cycle or more of the power supply frequency after the mechanical disconnection of the A-side main contact 73. is there. This is a time for ensuring that the A-side main contact 73 reliably passes through the current zero point and is electrically disconnected. If this condition is not satisfied, a voltage corresponding to a one-tap winding is applied between the poles of the A-side main contact 73 before the A-side main contact 73 is electrically disconnected, so that arc extinction may not be possible. . Therefore, the above switching procedure (3)-
The switching time between (4) is an important parameter for managing contact unbalance wear.

In the device monitoring system according to the present embodiment, the device data server 9 shown in FIG.
By performing the series of processes shown in (1) and (2), it is possible to calculate the amount of wear of the LTC / DS resistance contact and main contact.
Inspection time can be predicted. In the following, FIG.
The outline of the inspection time prediction calculation processing procedure will be described with reference to the flowchart of FIG.

First, the device data server 9 executes step 6
At 01, the device state quantity data S (t) transmitted from the data collection and transmission device 1 is received. Next step 60
If it is determined in step 2 that the data received in the receiving process in step 601 is the LTC operation data, the device data server 9 proceeds to step 603 and instructs the digital protection and control device 2 to perform the operation before the LTC operation. The system electricity data is requested, and at step 604, LTC
The electric quantity data E (t) before the operation is received. Specifically, the current value of the LTC is received.

Next, the device data server 9 executes step 6
In 051, the device characteristic data file 94 is referred to, a contact wear coefficient indicating a relationship between the contact loss amount of the LTC / DS and the switching current, and a device inspection correlation indicating a correlation between the contact loss amount of the LTC and the check required time. Get the data.
Next, in step 6052, the electric quantity data E (t) received in step 604 and the
Using the contact wear coefficient acquired by 51, the wear amount of the LTC / DS resistance contact and the main contact in the operation is calculated. Further, in step 6053, the wear amount data is added to the accumulated value up to that point based on the contact wear amount data calculated in step 6052. In the following step 6054, the switching time of the main contact and the resistance contact is estimated from the accumulated wear amount data of each contact,
The LTC inspection time is calculated from the equipment inspection correlation data acquired in step 6051 and the operation history so far. In step 606, the calculated inspection time is stored in the device data recording file 93.

Further, in step 607, if the inspection time is within the preset period from the present time, the equipment data server 9 notifies the data display device 3 in step 608. In the notified data display device 3,
By referring to the device data recording file 93 of the device data server 9 via the communication network 4, the LTC
Detailed inspection time data can be confirmed.

[Effect] The device data server 9 as described above
Allows the user to display the data display device 3
Above, it is possible to easily confirm the inspection time of the switch and the LTC which are the monitored devices. Therefore, according to the present embodiment, similarly to the above-described sixth embodiment, the device monitoring system can be further enhanced in function, and the maintenance and inspection work can be rationalized. It is possible to improve the economics of the entire system including the system.

Further, in this embodiment, since the inspection time is calculated by the equipment data server 9 based on the equipment inspection correlation data unique to the equipment, the equipment data server 9 can accurately inspect equipment having various configurations. Time can be calculated,
By providing the obtained inspection time prediction data to the user, the maintenance and inspection work of the user can be rationalized. Therefore, it is not necessary for the user to perform various types of data analysis relating to functional deterioration of various types of devices such as switches and LTCs, and to manage the device database necessary for such data analysis. The burden associated with is greatly reduced. Furthermore, according to the present embodiment, the equipment inspection correlation data, which is the know-how of the maker, can be managed by the equipment data server 9 and provided only to a limited number of users. A business model with high potential can be realized.

[Eighth Embodiment] [Configuration] FIG. 13 is a flowchart showing an outline of a processing procedure according to an eighth embodiment. In the eighth embodiment, in the configuration of the seventh embodiment shown in FIG. 8, the device data server 9 includes the device state quantity data S (t) from the data collection and transmission device 1 and the digital protection control device 2. Using the operating state data P (t) from the server and the data in the equipment characteristic data file 94, the abnormality occurrence part of the equipment is identified, and depending on the abnormality occurrence part, whether or not the operation can be continued, the recovery operation procedure, and The data display device 3 is configured to notify the data display device 3 of support data such as the cause of the abnormality.

[Operation] In the eighth embodiment having the above-described configuration, it is possible to specify the abnormality occurrence part of the monitored device U and generate more specific support data corresponding to the abnormality occurrence part. it can. In the following, the process of identifying an abnormality occurrence part according to the present embodiment will be described, taking as an example the case where the monitored device U is the gas insulated switchgear shown in FIG.

First, as described in the fifth embodiment, when a ground fault occurs inside a gas insulated switchgear as shown in FIG.
By gas pressure sensors S1 to S4 provided in each gas compartment,
Although it is possible to specify the failure occurrence part in each gas section unit, it was not possible to specify a more detailed position. On the other hand, in the device monitoring system according to the present embodiment, when a failure occurs in the device, the device data server 9 shown in FIG. 8 performs a series of processes shown in FIG. The site of occurrence can be specified. In the following, an outline of the procedure for specifying the failure site will be described with reference to the flowchart of FIG.

First, the device data server 9 executes step 7
At 01, the device state quantity data S (t) transmitted from the data collection and transmission device 1 is received. Next step 70
If it is determined in step 2 that the data received by the receiving process in step 701 is the fault point detection data, the equipment data server 9 proceeds to step 703 and instructs the digital protection and control device 2 to perform the operation before the fault point detection. The device operation state data is requested, and in step 704, the operation state data P (t) before the detection of the failure point is received. The processing up to this point will be specifically described with reference to the gas system diagram shown in FIG. 5. When a ground fault is detected in the gas section G4, data indicating the occurrence of a failure in the gas section G4 is received in step 701. Then, in step 704, information on the ON / OFF state of each switch before the occurrence of the failure is received.

Next, the device data server 9 executes step 7
In step 051, the device configuration data of the device is acquired with reference to the device characteristic data file 94, and the device configuration data is obtained in step 7052 by the device configuration data and the operation state data P (t) obtained in step 704. Calculate the electrical part. Further, based on the power application unit data calculated in step 7052, step 705 is performed.
In step 3, a failure occurrence site is specified. Then, in step 7054, the basic performance data of the device, the substation configuration data of the substation, and the like are acquired with reference to the device characteristic data file 94. Analyze whether continuation is possible, recovery operation procedure, and cause of error occurrence. In the following step 706, the failure occurrence site data and the analysis result are stored in the device data recording file 93.

Further, the device data server 9 notifies the data display device 3 in step 707. The notified data display device 3 refers to the device data recording file of the device data server via the communication network 4 so as to confirm detailed failure occurrence site data, whether or not to continue operation, a recovery operation procedure, and It is possible to obtain support data such as the cause of the abnormality.

[Effect] The device data server 9 as described above
Allows the user to display the data display device 3
As described above, in addition to being able to confirm the failure occurrence site of the monitored device in detail, it is possible to obtain support data such as whether or not to continue the operation, a recovery operation procedure, and the cause of the abnormality. Therefore, according to the present embodiment, the function of the device monitoring system can be enhanced, and it is possible to contribute to easier and quicker response in the event of an accident.

[Modification] In this embodiment,
After the failure site is specified by the device data server 9, more specific support data including whether the operation can be continued, the recovery operation procedure, and the cause of the abnormality are generated. One of the support data is provided. Sufficient effects can be obtained simply by generating data. In addition, it is also possible to present a user with a failure occurrence site and to select support data to be added. Further, it is also possible to specify only a failure occurrence part. In other words, if the failure is not a serious failure, or if the user does not need the support data because there is a corresponding manual corresponding to the failure occurrence site, etc.
It is possible to provide sufficient support.

[Ninth Embodiment] [Configuration] FIG. 14 is a flowchart showing an outline of a processing procedure according to a ninth embodiment. In the ninth embodiment, in the configuration of the seventh embodiment shown in FIG. 8, the device data server 9 includes the device state amount data S (t) from the data collection and transmission device 1 and the digital protection control device 2. Quantity data E (t) from the device and the device characteristic data file 9
4 is configured to execute a calculation for estimating a temporary allowable load of the device using the data in FIG.

[Operation] In the ninth embodiment having the above configuration, it is possible to predict a temporary allowable load on the monitored device U. Hereinafter, an example of a process of calculating an allowable load of a device according to the present embodiment will be described, taking a case where the monitored device U is a transformer. First, the insulation of a transformer gradually deteriorates due to humidity, temperature, oxygen, etc. during operation, and as it progresses, abnormal voltage such as external lightning, internal lightning, etc., or electromagnetic mechanical force at the time of external short circuit, etc. When subjected to abnormal electrical or mechanical stress, the risk of destruction increases. The time from the start of operation of the transformer to the point at which this danger is greatly increased is called the life of the transformer. It is generally said that the life of a transformer is determined by its peak temperature. In other words, it is possible to calculate how long the life has been used based on the highest point temperature and the elapsed time. The highest point temperature in the transformer occurs at the windings and cannot be measured directly. The maximum point temperature of the winding depends on the shape of the winding, the shape and arrangement of the winding support spacer, etc., but can be measured by a sensor, that is, the average winding temperature, oil temperature, outside air temperature, load current, etc. Can be calculated from

In the equipment monitoring system according to the present embodiment, a series of processing shown in FIG. 14 is executed by the equipment data server 9 shown in FIG. And the transformer can be operated efficiently. In the following, Figure 1
The permissible load prediction calculation process will be described with reference to the flowchart of FIG. In the present embodiment, a case will be described in which an allowable load current value during this period is presented by inputting a high load operation time to be continued in the future.

First, the device data server 9 executes step 8
01, at regular intervals, the data collection and transmission device 1
Receives the device state quantity data S (t) transmitted from the.
In subsequent step 802, when it is determined that the data received by the reception processing in step 801 is the transformer state quantity data, the equipment data server 9 proceeds to step 803 and sends the current data to the digital protection control device 2. In step 804, the operation electric amount data E (t) of the transformer transmitted from the digital protection and control device 2 is received. In particular,
External temperature, oil temperature, winding temperature data, and load current data are received as device state quantity data and operating electricity quantity data.

Next, the device data server 9 executes step 8
At 051, the device characteristic data file 94 is referred to, and the highest point temperature correlation data indicating the correlation between the highest point temperature of the transformer and the outside air temperature, oil temperature, winding temperature, and load current is obtained,
In step 8052, the outside air temperature, oil temperature, winding temperature data received in step 801 and step 8
Using the load current data received by step 04, the highest point temperature inside the transformer is calculated.

In step 8053, a time during which high load is expected to continue and a high load duration are received from the data display device 3. In the following Step 8054, Step 8
The maximum point temperature is calculated from the high load continuation time received in 053 and the outside air temperature expected in the future, and the allowable load current is calculated based on this. In the following step 806, the permissible load current data is stored in the device data recording file 93,
In step 807, the data display device 3 is notified. The notified data display device 3 can confirm detailed allowable load data by referring to the device data recording file of the device data server via the communication network 4.

[Effect] By the above series of processing,
The user can easily confirm the temporary allowable load on the transformer, which is the monitored device, on the data display device 3. Therefore, according to the present embodiment, the function of the device monitoring system can be further enhanced, and the monitored device can be efficiently operated. Can be improved.

In the present embodiment, since the highest point temperature is calculated by the device data server 9 based on the highest point temperature correlation data unique to the device, it can be applied to transformers having various configurations. The allowable load can be calculated with high accuracy, and by providing the user with the obtained allowable load,
The driving efficiency of the user can be improved. Therefore, the user does not need to perform various types of data analysis related to transformer function degradation or manage the equipment database required for such data analysis, greatly reducing the burden on operating efficiency management. Is done.
Furthermore, according to the present embodiment, the highest point temperature correlation data, which is the know-how of the manufacturer, can be managed by the device data server 9 and provided to a limited number of users. A business model with high potential can be realized.

[Modification] In this embodiment,
Although the allowable load was predicted by inputting the high load duration, the present invention is not limited to this function.
As a modification of the present embodiment, by inputting a desired load amount, it is possible to predict an allowable high load continuation time, or to calculate a cumulative life loss of a transformer and predict an inspection time. is there.

[Tenth Embodiment] [Structure] FIG. 15 is a block diagram showing the structure of a data collection and transmission device of a device monitoring system according to a tenth embodiment. As shown in FIG. 15, the present system omits the device data server 9 by changing the configuration of the data collection and transmission device 1 in the device monitoring system according to the above-described seventh embodiment. .

That is, in the present embodiment, in addition to the monitoring data converting means 12, the monitoring data storing means 13, the data transmitting / receiving means 14, and the GPS receiving section 15, the data collecting / transmitting apparatus 1 includes a processing means 16, A file 17 and a device characteristic data file 18 are provided. The data transmission / reception means 14 receives the electric quantity data E (t) with the absolute time and the operation state data P (t) sent from the digital protection and control device 2 via the communication network 4 respectively. It is supposed to.

In the processing means 16, the device state quantity data S (t) with absolute time stored in the monitoring data storage means 13 of the data collection and transmission apparatus 1 and the received electric quantity data E (t) with absolute time are stored. ) And operating state data P
Using (t) and the basic performance data and the device configuration data in the device characteristic data file 18, device monitoring / maintenance support calculations are performed, and the results are stored in the device data recording file 17 and displayed as necessary. The device 3 is notified. In addition, other parts
Since the configuration is the same as that of the first embodiment, the description is omitted here.

[Operation] FIG. 16 shows a data processing procedure in the data collection and transmission device 1 and the digital protection and control device 2 until the device monitoring / maintenance support data is recorded in the present system having the above configuration. It is a flowchart which shows the outline of. As shown in this figure, first, the data collection and transmission device 1
Thus, the device state quantity data is input at a predetermined time or each time an operation occurs (step 901), and the time obtained by the GPS receiving unit 15 is added to the input device state quantity data, and the monitoring data storage means 13 is temporarily stored (step 902).

In parallel with this, also in the digital protection and control device 2, the operation data conversion means 22 inputs the system electric quantity data and the equipment operation state data at a predetermined time or every time an operation occurs (step 1001). The time obtained by the GPS receiving unit 25 is added to the input data, and the data is temporarily stored in the operation data storage unit 23 (step 1002). Next, the data collection and transmission device 1
Then, the device state quantity data is determined based on preset conditions, and when it is determined that arithmetic processing is necessary (step 9).
03 (YES), a request is made to the digital protection and control device 2 for transmission of the system electric quantity data and the equipment operation state data at the time (step 904).

When receiving the data (YES in step 1003), the digital protection and control device 2 transmits the data stored in the operation data storage means 23 to the data collection and transmission device 1 (step 1004). The data collection and transmission apparatus 1 receives this data (step 905), and monitors and maintains the equipment using the equipment state quantity data, the system electric quantity data, the equipment operation state data, and the data in the equipment characteristic data file 18. A support operation is performed (step 906), and the operation result is stored in the device data recording file 17 (step 907). Further, when it is necessary to notify the data display device 3 of the calculation result (YES in step 908), the data display device 3 is notified (step 909).

[Effect] In the device monitoring system of the present embodiment, maintenance information such as device inspection time data can be stored and managed in the data collection and transmission device 1 without providing a device data server. For this reason,
In addition to the effects of the seventh embodiment described above, the system configuration can be simplified and the economics of the system can be improved.

[Other Embodiments] The present invention is not limited to the above embodiments, and various other embodiments can be implemented within the scope of the present invention. For example, in the fifth and eighth embodiments described above, the case where a detailed failure occurrence part is specified in the failure occurrence gas compartment is specified as the specification of the abnormality occurrence part. Is not limited to this,
The location of the partial discharge occurrence can be specified in the same manner, and similarly excellent effects can be obtained. Here, as the identification of the abnormality occurrence site, it is possible to specify either the failure occurrence gas section or the partial discharge occurrence site, but in general, it is configured to specify both. It is desirable to do.

In the seventh embodiment, the predicted values of the switch contact wear amount and the on-load tap changer contact wear amount are calculated as the predicted values of the variables related to the function deterioration of the monitored device. The case has been described in which the inspection time of the switch and the tap changer under load is obtained as the prediction data in accordance with these prediction values. In the ninth embodiment, a case has been described in which a predicted value of a transformer allowable load is calculated as a predicted value of a variable related to functional deterioration of a monitored device, and the predicted value is provided as predicted data. .

However, the present invention is not limited to these embodiments, and it is also possible to predict a transformer allowable high load continuation time as a variable related to the function deterioration of the monitored device. . Further, it is also possible to obtain a predicted value of the cumulative life loss of the transformer and obtain the transformer inspection time as predicted data according to the predicted value. Here, the variables related to the function deterioration of the monitored device include the switch contact wear amount, the load tap changer contact wear amount, the transformer allowable load, the transformer allowable high load duration, and the transformer life. A certain effect can be obtained if at least one is included, but in general, it is possible to obtain a variety of forecast data useful for maintenance and inspection and operation efficiency management by configuring to obtain forecast values for all of these variables. Can be generated.

On the other hand, in each of the above embodiments, various data are received by the device data server 9 or the data collection / transmission device 1, but the present invention is not limited to this configuration. That is, as a modified example of each embodiment, the agent software autonomously moves each device, collects necessary data, performs arithmetic processing, and displays the result on each device or sends the result to a network. It is also possible to configure as follows. It is clear that the same effects as those of the present embodiment can be obtained in those configurations.

[0127]

As described above, according to the present invention,
Checking device monitoring data from anywhere by connecting a data collection and transmission device that collects data from sensors attached to the monitored device and a data display device that displays the collected data via a communication network Therefore, the function of the system can be improved. Therefore, it can contribute to labor saving of equipment maintenance and easy and quick response in the event of an accident, improving the operability of equipment and systems, and thereby improving the economics of the entire equipment. An advanced device monitoring system can be provided.

Further, by obtaining the absolute time, it is possible to compare the device monitoring data obtained in the system and the data measured by another system in the same time series, so that the data operability is improved. Can improve the functionality of the system. Therefore, it can contribute to easier and faster response in the event of an accident.
A more sophisticated device monitoring system can be provided. Furthermore, by taking in data from the digital protection controller via a communication network, the system can be simplified as much as possible, and more sophisticated equipment state judgment processing can be performed. An excellent and more sophisticated equipment monitoring system can be provided.

Further, by preliminarily storing various data required for data analysis, such as general basic performance data of equipment and electric station configuration data, the equipment installed in the user's electric station can be monitored. Thus, it is possible to provide a business model of a device monitoring method capable of generating some useful consulting data from the monitoring data at the time of maintenance inspection or occurrence of an abnormality and providing the data to a user.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a device monitoring system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a device monitoring system according to a second embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a device monitoring system according to a third embodiment of the present invention.

FIG. 4 is a frequency distribution diagram of a noise situation in a substation for explaining the effect of the device monitoring system according to the fourth embodiment of the present invention.

FIG. 5 is a gas system diagram showing a configuration of a gas insulated switchgear which is a monitored device of a device monitoring system according to a fifth embodiment of the present invention.

FIG. 6 is a schematic flowchart illustrating an example of processing of a device monitoring system according to a fifth embodiment of the present invention.

FIG. 7 is a schematic flowchart illustrating an example of processing of a device monitoring system according to a sixth embodiment of the present invention.

FIG. 8 is a lock diagram showing a configuration of a device monitoring system according to a seventh embodiment of the present invention.

FIG. 9 is a schematic flowchart illustrating an example of a process of a device monitoring system according to a seventh embodiment of the present invention.

FIG. 10 is a schematic flowchart illustrating an example of processing in a device data server of a device monitoring system according to a seventh embodiment of the present invention.

FIG. 11 is a connection diagram illustrating a configuration of an LTC serving as a monitored device of a device monitoring system according to a seventh embodiment of the present invention.

FIG. 12 is a schematic flowchart illustrating an example of processing in a device data server of a device monitoring system according to a seventh embodiment of the present invention.

FIG. 13 is a schematic flowchart illustrating an example of processing of the device monitoring system according to the eighth embodiment of the present invention.

FIG. 14 is a schematic flowchart illustrating an example of a process of a device monitoring system according to a ninth embodiment of the present invention.

FIG. 15 is a block diagram showing a configuration of a data collection and transmission device of a device monitoring system according to a tenth embodiment of the present invention.

FIG. 16 is a schematic flowchart illustrating an example of processing of the device monitoring system according to the tenth embodiment of the present invention.

FIG. 17 is a block diagram illustrating a configuration example of a conventional device monitoring and maintenance support system.

FIG. 18 is a model diagram of a potential deterioration failure for explaining an expected effect of the device monitoring and maintenance support system.

FIG. 19 is a block diagram showing a configuration example of a conventional device for measuring a contact wear amount of a switch.

[Explanation of symbols]

 L: Artificial satellite U: Monitored device 1: Data collection and transmission device 2: Digital protection and control device 3: Data display device 4: Communication network 4a: Local LAN 4b: Wide area communication network 5: Router 6: Transmission path medium 7 Communication Interface 8 Wireless Communication Channel 9 Device Data Server 11 Sensor 12 Monitoring Data Conversion Means 13 Monitoring Data Storage Means 14 Data Transmitting / Receiving Means 15 GPS Receiving Unit 15a GPS Receiving Antenna 16 Processing Meaning 17 Device data recording file 18 Device data file 22 Operation data conversion means 23 Operation data storage means 24 Data transmission / reception means 31 Data transmission / reception means 32 Data display means 33 Input / output unit 91 Data transmission / reception means 92 Processing Means 93: Device data recording file 94: Device characteristic data Tafir

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 17/60 110 G06F 17/60 110 G08B 25/01 G08B 25/01 AD 31/00 31/00 B H02H 3/00 H02H 3/00 D 3/04 3/04 D H02J 13/00 301 H02J 13/00 301A (72) Inventor Masayuki Akazaki 1-1-1, Shibaura, Minato-ku, Tokyo Inside the Toshiba head office (72) Inventor Takaaki Sakakibara 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture F-term in the Toshiba Hamakawasaki Plant (reference) 5C087 AA02 AA03 BB03 BB07 BB74 DD08 DD22 EE05 FF01 FF04 GG66 GG70 GG83 5G042 DD03 DD12 DD15 5 AA01 AA07 AC01 AC03 AC05 AC08 BA02 BA09 CB19 DA02 5H223 AA02 DD05 DD07 DD09 EE21 EE29 FF08

Claims (14)

[Claims] 1. An equipment monitoring system for monitoring the status of equipment installed in an electric substation, wherein data from a sensor attached to a monitored equipment is collected and converted into digital data, and the obtained digital data is converted into equipment monitoring data. A data collection and transmission device for sending to a communication network as a digital data from the data collection and transmission device via the communication network or a digital signal indicating information related to the state of the monitored device generated based on the digital data. A device monitoring system comprising: a data display device that receives data and displays data related to the state of the monitored device in accordance with the received digital data. 2. The data collection and transmission device according to claim 1, wherein the data acquisition and transmission device is configured to obtain an absolute time, convert the data into digital data according to the absolute time, and add the absolute time at the sampling time to the obtained digital data. The device monitoring system according to claim 1, wherein: 3. The system according to claim 1, further comprising: taking in electrical quantity data of a system controlled by the monitored device and operating state data of the monitored device, converting the data into digital data, and performing protection control of the system in accordance with the obtained digital data; A digital protection control device for transmitting digital data to the communication network as electric quantity data and operation state data, wherein the digital protection control device acquires an absolute time;
The digital data is converted in accordance with the absolute time, and the absolute time at the time of sampling is added to the obtained digital data. The data display device transmits the digital data from the data collection and transmission device via the network. Receiving digital data indicating information related to the state of the monitored device generated based on the data and the digital data from the digital protection control device or at least one of the digital data, and The apparatus monitoring system according to claim 2, wherein the apparatus is configured to display data related to a state of the monitored apparatus in response. 4. The communication network is configured by a first communication network for a local area constructed in each substation, and a second communication network that connects a plurality of substations in a wide area, The data collection and transmission device is connected to the first communication network using a wire selected from unused wires and wires including a power supply wire of an electric cable. The device monitoring system according to any one of the above. 5. The communication network according to claim 1, wherein the communication network includes a first communication network for a local area constructed in each substation, and a second communication network that connects a plurality of substations in a wide area. The data collection and transmission device uses the wireless communication to perform the first
The device monitoring system according to any one of claims 1 to 3, wherein the device monitoring system is connected to a communication network. 6. The device monitoring system according to claim 1, wherein the data collection and transmission device is connected to the communication network using wireless communication. 7. The data collection and transmission device, the digital protection and control device, and at least one of the data display devices each include: device monitoring data obtained by the data collection and transmission device; and a digital protection and control device. The operation state data obtained by using at least one of the two types of data is used to identify the abnormality occurrence site of the monitored device, and to generate support data corresponding to the identified abnormality occurrence site. The device monitoring system according to any one of claims 3 to 6, wherein: 8. The apparatus monitoring system according to claim 7, wherein the identification of the abnormality occurrence part includes identification of at least one of a failure occurrence gas section and a partial discharge occurrence part. 9. At least one of the data collection and transmission device, the digital protection and control device, and the data display device includes: device monitoring data with absolute time obtained by the data collection and transmission device; Using at least one of the two types of data, that is, the operation state data with absolute time obtained by the protection control device, and the electric quantity data with absolute time obtained by the digital protection control device, the function of the monitored device is used. The apparatus monitoring according to any one of claims 3 to 6, wherein the apparatus is configured to calculate a predicted value of a variable related to deterioration and generate prediction data according to the obtained predicted value. system. 10. The variable related to the function deterioration is at least one of a switch contact wear amount, a load tap changer contact wear amount, a transformer allowable load, a transformer allowable high load duration, and a transformer life. The device monitoring system according to claim 9, further comprising: 11. A device monitoring method for monitoring a state of a device installed in a user's electric station and generating necessary data, wherein the step of prompting the user to input performance identification information including a rating of the monitored device. Receiving device monitoring data of the monitored device; receiving electric quantity data of a system controlled by the monitored device; and storing a device database based on the performance identification information input by a user. Obtained the basic performance data of the monitored device with reference to, based on the basic performance data and the received electric quantity data, calculated the predicted value of a variable related to functional deterioration of the monitored device, and obtained the obtained value. Generating a prediction data according to the prediction value. 12. The step of generating the predictive data includes the steps of: a switch contact wear amount, a load tap changer contact wear amount based on the obtained basic performance data and the received electric quantity data for the monitored device. Calculating a cumulative value of an item determined according to the monitored device from the life of the transformer as the predicted value; and monitoring the monitored value based on the calculated cumulative value and the obtained basic performance data. The apparatus monitoring method according to claim 11, further comprising a step of generating inspection time prediction data of the apparatus. 13. A device monitoring method for monitoring a state of a device installed in an electric station of a user and generating necessary data, wherein the step of prompting the user to input performance identification information including a rating of the monitored device. Receiving the device monitoring data of the monitored device; receiving the operation state data of the monitored device; and, based on the performance identification information input by a user, referring to a device database, Obtain basic performance data of the monitored device, identify an abnormality occurrence site of the monitored device based on the basic performance data and the received operation state data, and generate support data corresponding to the identified abnormality occurrence site. And monitoring the device. 14. The method according to claim 1, wherein the step of generating the support data includes the step of specifying an abnormality occurrence part of the monitored device based on the obtained basic performance data and the received operating state data; The method according to claim 13, further comprising: generating support data indicating at least one of availability of operation continuation, a recovery operation procedure, and an abnormality occurrence cause based on the data and the identified abnormality occurrence site. Device monitoring method as described.