JPH1080075A - Remote operation and supervisory system for protective relaying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a list of collected data when a digital protective relaying device detects operations or abnormality by transferring the operating states of other devices to a terminal at a remote place before and after the relaying device detects the operations or abnormality. SOLUTION: When a digital protective relaying device detects operations or abnormality, the relaying device transmits the event occurring time to a terminal device 6 at a remote place by means of the time transmitting means 3 of a digital protective controller 1. The terminal device 6 receives the time by means of a time designating means 7 and requests the device to be remotely operated to send data by transmitting designated time. Upon receiving the request, the protective relaying device extracts relevant data from the data kept in a data keeping means 5 by means of a data retrieving means 4. The data editing means 8 of the terminal device 6 edits the extracted data and a displaying means 9 displays the edited data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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]

2. Description of the Related Art With the advancement and reliability of information transmission technology and the improvement of functions accompanying the spread of digital protection relays, digital protection relays can be used to transmit various types of information from a distance via a transmission system. It is possible to realize a remote operation monitoring system that monitors operation and operation status.

Next, the outline and configuration of a conventional remote operation monitoring system for a protective relay will be described with reference to FIGS. FIG.
Is an example of the basic configuration of a remote operation monitoring system for digital protection relays. Reference numerals 61, 62, and 63 denote electrical stations A, B, and C, such as substations, where the digital protection relay is installed. There are 65, a power company head office, a branch office, a power station, a control center, etc., in which a terminal device 66 for remote operation monitoring is installed, 64 is an electric station and a power company head office,
It is a communication network connecting branches, power stations, control stations, and the like.

FIG. 7 shows a configuration inside an electric substation. 71, 7
2 is a digital protection controller, 73 is an optical transceiver,
74 is an optical repeater, 75 is a transceiver, 76 is LA
N and 77 are terminators, 78 is a protocol converter, 79 is a modem, and 80 is an Ethernet interface.

[0005] The digital protection controllers 71 and 72 are connected to the optical transceiver 7 from the Ethernet interface 80.
3 and the optical repeater 74 transmit and receive data. From the optical repeater 74, the transceiver 75 is transmitted and received by electric signals.

Here, the data is collected on the LAN 76 in the electric substation. 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.

FIG. 8 shows the configuration of a digital protection relay for explaining an embodiment of a conventional device. 1
5 is a digital protection controller, 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 and 21 are input converters, 22 is a filter, 23 is a sample and hold circuit, 2
4 is a multiplexer and 25 is an analog / digital converter.

Further, in the figure, 27 is a CPU, 28 and 29 are RAM and ROM, and 26 is an Ethernet interface, respectively.

The digital protection controller 16 takes in the current and voltage of the power system from a current transformer (CT) 30 and a transformer (PD or PT) 19 via input converters 20 and 21, and a filter 22 and a sample hold circuit. 23, an analog / digital converter 25 via a multiplexer 24
Is converted into digital data. This digital data is transmitted to the remote operation monitoring system.

The main CPU 27 has a RAM 28 and a ROM
Calculate based on necessary data stored in 29,
The main function of the digital protection controller 16 is realized, and the Ethernet interface 26 sends digital data via a transmission system to a terminal device of the remote operation monitoring system.

In such a remote operation monitoring system for a digital protection relay, an operator mainly monitors and confirms the operation, operation state, electric quantity, and the like of each protection control device using a remote operation monitoring system. Only the functions are realized.

Therefore, a method is employed in which each protection relay device is accessed when the device operates or is abnormal, and the operator confirms each of the protection relay devices. Was spending a lot of time.

More specifically, all of the protection relay devices that are performing the same analog input, such as when a plurality of digital protection control devices connected to the same system have failed to monitor an analog input due to a change in the amount of system power. Need to know the information.

[0014]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention often deals with a case where a power system accident and a device failure are related to a plurality of protective relay devices in a remote operation monitoring system. Focusing on that, a function to temporarily save the current state in the digital protection relay,
The device that detects the operation or abnormality notifies the remote terminal of the time.

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. Provides a remote operation monitoring system for a protective relay that realizes maintenance-free backup by enabling the terminal to display collected data in a list and has an automatic patrol function to transfer the current information at a specified time. It is intended to do so.

[0016]

To achieve the above object, a remote operation monitoring system for a protective relay according to a first aspect of the present invention is a digital system having a function of storing information at the time of an accident or abnormality. Type protection relay, and a communication network connecting the digital type protection relay and a distant terminal,
A network for connecting a plurality of the digital type protective relays in a substation, and information from the plurality of digital type protective relays which is transferred to the digital type protective relay by designating the time of an accident or abnormality And a display device that displays the information collected by the terminal in an easily viewable list.

In the system configured as described above, information on a plurality of digital protection relays to be subjected to the remote operation monitoring system is based on the time of the digital protection relay when the operation or abnormality of the equipment is detected. Since the information can be viewed at a glance in the list display, 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.

Further, in the remote operation monitoring system for a protection relay device according to claim 2 of the present invention, the digital protection relay device which has detected an abnormal operation of a distant terminal or an abnormality detects the time (time 1). Transmission means for transmitting to a distant terminal;
The terminal having received the time information is means for knowing the current time (time 2) of the plurality of digital protection relay devices to be subjected to another remote operation monitoring system, and the terminal of the remote operation monitoring system based on the difference between time 1 and time 2. It comprises means for determining and transmitting information collection time to a plurality of target digital protection relays.

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.

According to a third aspect of the present invention, there is provided a remote operation monitoring system for a protection relay device, wherein the digital protection relay device which is a target of the remote operation monitoring system collects information such as an operation state at a certain time. The system comprises a means for storing a case and a means for transmitting information around the time according to a specified time from a distant terminal.

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 on the device which did not reach the device operation is also viewed. be able to. That is, the relevance to other devices can be understood.

Further, a remote operation monitoring system for a protection relay device according to a fourth aspect of the present invention includes means for storing an application state of the digital protection relay device at a designated time according to a set time of a remote terminal. And a terminal device having a function of collecting the above information, and a display means for displaying a list of the terminal devices.

In the system configured as described above, patrol is automatically performed by setting the time from a distant terminal.
Since the results can be viewed in a list from a distance, personnel who patrol on site can be omitted. In other words, no maintenance and no inspection can be backed up.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a remote operation monitoring system for a protection relay device according to the present invention will be described below with reference to FIGS.

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 installed in a head office, a branch, a power station, and a control station of a power company. A terminal device for performing operation monitoring is provided, 7 is a time designation unit, 8 is a data editing unit, and 9 is a display unit.

The digital protection relay device which 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 remote terminal device 6 receives this time by the time specifying means 7 and transmits the specified time to the target device for remote operation to request data.

The protection relay device which has received the request is used by the data search means 4 to extract the corresponding data from the data stored in the data storage means 5. The extracted data is edited by the data editing means 38 of the remote terminal device 6 and displayed on the display means 39.

The above will be described with reference to the control flowchart of the protection control device shown in FIG. Step 10
Then, it is determined whether or not an accident or abnormality has occurred in the system.
Proceed to 2. If there is no abnormality, go directly to step 12.

In step 12, it is determined whether or not there is a time request from a distant terminal. If there is a time request, the data search means 4 searches the data in the data storage means 5,
In step 15, the corresponding data is transmitted to the 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 again to repeat the same operation.

FIG. 3 is a flowchart on the terminal device side showing an embodiment of a remote operation monitoring system for a protection relay device according to claim 2 of the present invention. First, in step 20, it is confirmed whether or not an event occurrence time has been received from the operation abnormality detection device.
If received, the current time of each target device for remote operation monitoring is obtained in step 21, and in the next step 22,
The absolute 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.

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 detection device, the same determination operation is repeated if the event occurrence time has not been received.

FIG. 4 is a flowchart of data storage on the protection control device side in the embodiment of the remote operation monitoring system for protection relay device 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.

In step 31, it is determined whether or not one cycle has elapsed. When the set cycle time has been recognized, in step 32, the data such as the operation status is frozen. In step 33, the data is stored in the storage area in the memory of the protection control device. Store several data.

If the elapse of the set cycle time is not recognized in the judgment at 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 invention according to claim 1.

FIG. 5 is a flowchart of an automatic inspection for transferring the current operation state and the like of the protection control device to a remote terminal in the embodiment of the protection relay device remote operation monitoring system according to claim 4 of the present invention. It is. At step 40, the data collection time is set in the memory of the protection control device.

The protection controller 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 collected in the automatic inspection memory in step 43. Store the data. After storing the data, in step 44, the setting of the next collection time is rewritten.

Next, at step 45, it is determined whether 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 invention according to claim 1.

In this way, an automatic patrol function of simultaneously transferring the current operation state and the like to the remote terminal at a certain cycle in response to a request from the remote terminal is achieved.

[0039]

As described above, the remote operation monitoring system of the protection relay device of the present invention is a target of the remote operation monitoring system based on the time of the digital protection relay device in which the device operation or abnormality is detected. Since information on a plurality of digital protection relays can be viewed 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.

Further, since the times of the digital protection relays are synchronized and information is collected at the absolute time of each digital protection relay, errors in 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, so that information on the equipment that did not reach the operation of the equipment can be seen, and the relevance to other equipment can be seen. I understand.

Then, 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.
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 flow chart 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 that 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 Power company head office, branch 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)

[Claims] 1. A remote operation monitoring system for remotely monitoring operation and status of a digital protection relay for inputting an amount of electricity of a power system, converting the data into digital data, and performing protection control of the power system. At the time of occurrence of a power system accident or at the time of device failure, by specifying the time from a distance, the information is stored in the plurality of digital protection relay devices to be monitored for operation by the digital protection relay device before and after the specified time. A remote operation monitoring system for a protection relay device, wherein a remote relay is searched for and displayed on a remote terminal. 2. A digital protection relay device which has operated or has failed, transfers the time to a remote terminal via a communication network, and a remote operation monitoring system operates a plurality of digital protection relays to be monitored. 2. The remote operation monitoring system for a protection relay device according to claim 1, further comprising a function of collecting the current time of the protection relay device and determining a time of data to be transferred to a distant terminal from the time difference. 3. 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 have a function of holding a specified time from a remote terminal. 2. The remote operation monitoring system for a protection relay device according to claim 1, wherein the information is transferred by the following. 4. The plurality of digital protection relays to be monitored by the remote operation monitoring system, simultaneously transfer a current operation state and the like 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, further comprising an automatic patrol function.