JP3559398B2 - Remote operation monitoring system for protection relay - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote operation monitoring system for a protection relay device for remotely inspecting and monitoring the operation of a digital protection relay device for an electric power system and the operation state of the device.
[0002]
[Prior art]
Due to the sophistication and reliability of information transmission technology and the improvement of functions associated with the spread of digital protection relays, the operation and operation status of digital protection relays via a transmission system for transmitting various information from a distance. It is possible to realize a remote operation monitoring system that monitors the operation of the system.
[0003]
Next, the outline and configuration of a conventional remote operation monitoring system for a protective relay will be described with reference to FIGS. FIG. 6 shows an example of the basic configuration of a remote operation monitoring system for digital protection relays. Reference numerals 61, 62, and 63 denote substations A, B, and substations in which the digital protection relays are installed. C denotes a head office, a branch office, a power station, a control center, etc. of a power company in which a terminal device 66 for remote operation monitoring is installed, and 64 denotes a head office, a branch office, a power station of the power company and the power company. , A communication network connecting control stations and the like.
[0004]
FIG. 7 shows the configuration inside the electric substation. Reference numerals 71 and 72 denote digital protection controllers, 73 denotes an optical transceiver, 74 denotes an optical repeater, 75 denotes a transceiver, 76 denotes a LAN, 77 denotes a terminator, 78 denotes a protocol converter, 79 denotes a modem, and 80 denotes an Ethernet interface.
[0005]
The digital protection controllers 71 and 72 transmit and receive data from the Ethernet interface 80 using the optical transceiver 73 and the optical repeater 74, and the optical repeater 74 transmits and receives data using the electrical signal.
[0006]
Here, the data is collected on the LAN 76 in the electric station. From here, the protocol is converted by the protocol converter 78, and information is transmitted and received to and from a remote terminal device via a communication network.
[0007]
FIG. 8 shows a configuration of a digital protection relay for explaining an embodiment of a conventional device. 15 is a digital protection control device, 16 is a system bus, 17 is a circuit breaker, 18 is a transmission line, 30 is a current transformer (CT), 19 is a transformer (PD or PT), 20, 21 are input converters, 22 is a filter, 23 is a sample and hold circuit, 24 is a multiplexer, and 25 is an analog / digital converter.
[0008]
Further, in the same figure, 27 is a CPU, 28 and 29 are RAM and ROM, and 26 is an Ethernet interface.
[0009]
The digital protection controller 16 takes in the current and voltage of the power system from a current transformer (CT) 30 or a transformer (PD or PT) 19 via input converters 20 and 21, a filter 22, a sample and hold circuit 23, and a multiplexer. The data is converted into digital data by an analog / digital converter 25 via the control unit 24. This digital data is transmitted to the remote operation monitoring system.
[0010]
The main CPU 27 operates based on necessary data stored in the RAM 28 and the ROM 29 to realize the main function of the digital protection controller 16, and the Ethernet interface 26 is connected to the terminal device of the remote operation monitoring system via a transmission system. To send digital data.
[0011]
In such a remote operation monitoring system of a digital protection relay, only the function of an operator monitoring and confirming mainly the operation and operation state of each protection control device and the amount of electricity with a remote operation monitoring system is provided. It is being implemented.
[0012]
Therefore, in the case of equipment operation or abnormality, each protection relay device is accessed and the operator confirms each one.Therefore, many operators need to associate information of multiple digital protection relay devices with each other. Spending time.
[0013]
Specifically, the information of all the protection relay devices performing the same analog input, such as when a plurality of digital protection control devices connected to the same system have an analog input monitoring failure due to a change in the system electric quantity, is known. There is a need.
[0014]
[Problems to be solved by the invention]
In order to solve such a problem, the present invention focuses on the fact that power system accidents and equipment failures are often related to a plurality of protective relays in a remote operation monitoring system, and a digital protection relay is provided. A function to temporarily save the current state is provided in the electric device, and the device that has detected an operation or abnormality notifies the remote terminal of the time.
[0015]
The remote terminal transfers the time information to another digital protection relay, and each device transfers the stored information before and after the requested time to the remote terminal. It is an object of the present invention to provide a remote operation monitoring system for a protection relay device that realizes maintenance-free backup by enabling a list display of collected data and having an automatic patrol function of transferring current information at a designated time. It is the purpose.
[0016]
[Means for Solving the Problems]
More in order to achieve the above object, a remote operation monitoring system protective relay apparatus according to claim 1 of the present invention, which enter the quantity of electricity of the power system, performs protective control of the electric power system is converted into digital data In a remote operation monitoring system for remotely operating and monitoring the operation and status of the digital type protection relay device of each of the above, each digital type protection relay device comprises a time transmission means, a data search means and a data storage means. The terminal device for monitoring comprises a time designation unit, a data editing unit and a display unit. When a power system accident occurs, or when a device abnormality occurs, a plurality of the above-mentioned systems to be monitored for operation by the time designation from a distance. searching from among the information digital protective relay device is holding around the specified time, the display of the remote terminal to edit in the data editing means Configured to list on stage.
[0017]
In a system configured in this way, information on a plurality of digital protection relays that are the targets of the remote operation monitoring system is displayed in a list based on the time of the digital protection relay that detected the device operation or abnormality. Since the information can be viewed all at once, there is no need for the operator to judge and associate each piece of information each time. Therefore, accurate analysis can be performed from a distance.
[0018]
Also, a remote operation monitoring system for a protective relay device according to claim 2 of the present invention is the remote operation monitoring system for a protective relay device according to claim 1, wherein a remote terminal operates or detects an abnormality. The digital protection relay has transmission means for transmitting the time (time 1) to a distant terminal, and the terminal receiving the time information has a plurality of digital protection relays which are targets of another remote operation monitoring system. It comprises means for knowing the current time (time 2), and means for determining and transmitting the information collection time to a plurality of digital protection relays which are the targets of the remote operation monitoring system from the difference between time 1 and time 2.
[0019]
In the system configured as described above, the time of the digital protection relay is synchronized and information is collected based on the absolute time of each digital protection relay, so that errors in collected data are reduced.
[0020]
Further, a remote operation monitoring system for a protective relay device according to claim 3 of the present invention is the remote operation monitoring system for a protective relay device according to claim 1, wherein the digital protection relay is a target of the remote operation monitoring system. The electric device is constituted by means for storing several pieces of operation state information at every fixed time and means for transmitting information before and after the time at a designated time from a distant terminal.
[0021]
The system configured as described above has a function of saving the current operation state and the like at regular time intervals, which is not available in the conventional digital protection relay device, so that information of the device that did not reach the device operation can also be viewed. . That is, the relevance to other devices can be understood.
[0022]
According to a fourth aspect of the present invention, there is provided a remote operation monitoring system of a protection relay device according to the first aspect, wherein the remote operation monitoring system of the protection relay device according to the first aspect has a digital operation at a designated time based on a set time of a distant terminal. a digital protective relay device having means for storing the operational state of the form protective relay device, a terminal device having a function of collecting the information, configured to list it.
[0023]
In the system configured as described above, the patrol is automatically performed by setting the time from a distant terminal, and the results can be viewed in a list from a distant place, so that personnel who perform the patrol locally can be omitted. In other words, no maintenance and no inspection can be backed up.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a remote operation monitoring system for a protection relay device according to the present invention will be described with reference to FIGS.
[0025]
FIG. 1 is a diagram showing an example of a basic configuration of a remote operation monitoring system for a digital protection relay device according to the present invention. In the figure, 1 and 2 are digital protection control devices, 3 is a time transmission means, 4 is a data search means, 5 is a data storage means, and 6 is a remote control installed in a head office, a branch, a power station, and a control station of a power company. Reference numeral 7 denotes a time designation unit, 8 denotes a data editing unit, and 9 denotes a display unit.
[0026]
The digital protection relay device that has detected an operation or abnormality transmits the event occurrence time to the remote terminal device 6 by the time transmission means 3 of the digital protection control device 1. The distant terminal device 6 receives this time by the time specifying means 7 and transmits the specified time to the remote operation target device to request data.
[0027]
Upon receiving the request, the protection relay device extracts the corresponding data from the data stored in the data storage device 5 by the data search device 4. The extracted data is edited by the data editing means 8 of the remote terminal device 6 and displayed on the display means 9 .
[0028]
The above is described with reference to the flowchart of the control on the protection control device side in FIG. In step 10, it is determined whether an accident or abnormality has occurred in the system. If there is an abnormality, the time at which the abnormality was detected in step 11 is transmitted by the time transmitting means 3, and the process proceeds to step 12. If there is no abnormality, the process proceeds directly to step 12.
[0029]
In step 12, it is determined whether there is a time request from a distant terminal. If there is a time request, the data retrieving means 4 retrieves the data in the data storage means 5, and in step 15, the corresponding data is transmitted to a remote terminal. If there is no time request, the current data is stored in the storage area in step 13, and the process returns to step 10 and repeats the same operation.
[0030]
FIG. 3 is a flowchart on the terminal device side showing an embodiment of a remote operation monitoring system for a protective relay device according to claim 2 of the present invention. First, in step 20, it is confirmed whether or not the event occurrence time has been received from the operation abnormality detecting device. If it has been received, the current time of each target device for remote operation monitoring is obtained in step 21. In the next step 22, the absolute time is obtained. The time calculation means obtains a difference between the current time of the event generation device and the current time of each of the other target devices, and determines the time required for each device.
[0031]
Next, in step 23, the absolute time obtained in step 22 is transferred to each device to request data. After receiving the request data, the data is edited by the received data editing means 8 in the terminal device in step 24 and displayed on the display means 9. If it is determined in step 20 that the event occurrence time has not been received from the operation abnormality detecting device, the same determination operation is repeated if the event occurrence time has not been received.
[0032]
FIG. 4 is a flowchart of data storage on the protection control device side in the embodiment of the protection relay device remote operation monitoring system according to claim 3 of the present invention. In step 30, it is set how often the data such as the operation state is to be taken into the memory of the protection control device.
[0033]
In step 31, it is determined whether or not one cycle has elapsed. When the elapse of the set cycle time has been recognized, in step 32, the data such as the operation status is frozen, and in step 33, several records are stored in the storage area in the memory of the protection control device. Store the data.
[0034]
If the elapse of the set cycle time is not recognized in the judgment of step 31, this judgment operation is repeated again. The data stored in this manner is searched for the information at a designated time from a remote terminal and transferred to the terminal. The operation on the terminal side is the same as that of the first aspect.
[0035]
FIG. 5 is a flowchart of an automatic inspection for transferring the current operation state and the like of the protection control device side to a remote terminal in the embodiment of the remote operation monitoring system for the protection relay device according to claim 4 of the present invention. At step 40, the data collection time is set in the memory of the protection control device.
[0036]
The protection control device determines in step 41 whether or not it is the data collection time, and when the collection time comes, the data is frozen and collected by the data collection means in step 42, and the collected data is stored in the automatic inspection memory in step 43. I do. After storing the data, in step 44, the setting of the next collection time is rewritten.
[0037]
Next, at step 45, it is determined whether or not there is a display request from a distant terminal. If there is a display request, the stored data is transmitted to the distant terminal at step 46. If there is no display request, or if the operation in step 46 has been completed, the process returns to step 41 and repeats the same operation. The operation on the terminal side is the same as that of the first aspect.
[0038]
In this way, an automatic inspection function for simultaneously transferring the current operation status and the like to the remote terminal at a certain cycle in response to a request from the remote terminal is achieved.
[0039]
【The invention's effect】
As described above, the remote operation monitoring system of the protection relay device of the present invention is based on the time of the digital protection relay device in which the device operation or abnormality is detected. Since the information of the relay device can be seen at a glance in a list, it is not necessary to collect each information to the site. Therefore, the analysis can be performed immediately from a distance.
[0040]
In addition, since the times of the digital protection relays are synchronized and information is collected based on the absolute time of each digital protection relay, errors in the collected data are reduced. Furthermore, it has a function to save the current operation status etc. at regular time intervals, which is not available in the conventional digital protection relay device, so that information on the device that did not reach the operation of the device can be viewed, and the relevance to other devices I understand.
[0041]
Then, the patrol is automatically performed according to the time setting from a distant terminal, and the results can be viewed in a list from a distant place. In other words, since no maintenance and no inspection can be backed up, the economy and reliability of the system are improved.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a remote operation monitoring system for a protection relay device according to claim 1 of the present invention.
FIG. 2 is a flowchart of an embodiment according to claim 1 of the present invention.
FIG. 3 is a terminal device side flowchart of the remote operation monitoring system according to claim 2 of the present invention.
FIG. 4 is a data storage flowchart of the remote operation monitoring system according to claim 3 of the present invention.
FIG. 5 is an automatic inspection flowchart of the remote operation monitoring system according to claim 4 of the present invention.
FIG. 6 is a schematic diagram of a conventional remote operation monitoring system for a relay device.
FIG. 7 is a configuration diagram of the inside of an electric power station which is a target of the remote operation monitoring system.
FIG. 8 is a configuration diagram of a protection control device that is a target of the remote operation monitoring system.
[Explanation of symbols]
1, digital protection control device 3 time transmission means 4 data inspection means 5 data storage means 6 terminal device 7 time designation means 8 data editing means 9 display means 15 digital protection control device 16 bus 17 circuit breaker 18 transmission line 19 PD or PT
20, 21 Input converter 22 Filter 23 Sample hold circuit 24 Multiplexer 25 A / D converter 26 Ethernet I / F
27 CPU
28 RAM
29 ROM
30 CT
61, 62, 63 Electric station 64 Communication network 65 Head office, branch office, etc. of power company 66 Terminal device 71, 72 Digital protection control device 73 Optical transceiver 74 Optical repeater 75 Transceiver 76 LAN
77 Terminator 78 Protocol converter 79 Modem 80 Ethernet I / F

Claims (4)

Enter the quantity of electricity of the power system, the remote operation monitoring system to operate monitor the status of the operation and apparatus is converted into digital data a plurality of digital protective relay device for performing protective control of the electric power system remotely, the digital The type protection relay comprises a time transmitting means, a data searching means and a data storing means, and the terminal device for remote operation monitoring comprises a time designating means, a data editing means and a display means . By specifying the time from a distance when a device error occurs, the system searches the information held by the plurality of digital protection relay devices to be monitored for operation before and after the specified time and edits the data. A remote operation monitoring system for the protective relay device, wherein the remote operation monitoring system edits the information by means and displays the list on the display means of the remote terminal. The digital protection relay device that has operated or has caused an abnormality transfers its time to a distant terminal via a communication network, and the remote operation monitoring system operates a plurality of the digital protection relay devices to be monitored. The remote operation monitoring system for a protection relay device according to claim 1, further comprising a function of collecting a current time and determining a time of data to be transferred to a distant terminal from the time difference. The plurality of digital protection relay devices to be monitored by the remote operation monitoring system have a function of holding several operation states at regular time intervals, and transfer the information at a designated time from a remote terminal. The remote operation monitoring system for a protection relay device according to claim 1, wherein: The plurality of digital protective relays to be monitored by the remote operation monitoring system have an automatic patrol function for simultaneously transferring a current operation state to the remote terminal in a certain cycle in response to a request from the remote terminal. The remote operation monitoring system for a protection relay device according to claim 1, wherein:

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