JPH066942A - Method and apparatus for inputting power system information - Google Patents

Abstract

PURPOSE:To make it possible to input information from a power system until input information of master and slave stations matches each other when input information of the master and slave stations out of parent stations is different each other. CONSTITUTION:When a condition is changed in a power system 10, information of the condition change is transmitted from a child station 12 to parent stations 20 and 22 through a HDLC line 14. In this case, the parent station 20 sends a request for telling receiving information to the parent station 22 every input information, and the parent station 22 sends receiving information to the parent station 20. When receiving information of each parent station is different, the parent station 20 transmits information for resending information of the condition change to the child station 12 regarded as a receiving error, and information of the same condition change as information previously transmitted from the child station 12 is again transmitted to each parent station 20 and 22. This processing is repeated until receiving information of each parent station 20 and 22 matches each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system information input method and apparatus, and more particularly, to a power station to monitor the status of a power system and monitor the slave station's monitoring results via a plurality of master stations. The present invention relates to a power system information input method and apparatus suitable for transmitting information to a master station and processing information related to the power system information in a master station.

[0002]

2. Description of the Related Art Conventionally, in a power system monitoring system, a plurality of master stations classified into a master station and a slave station and a slave station that monitors the status of the power system are connected via an information transmission line to When a state change occurs in the grid, the state change information accompanying this state change is output from the slave station to the information transmission line, and the master station that receives the state change information from this information transmission line outputs the received information. The method of processing is adopted. And as an information transmission line, HDLC (High-l
HDLC with evel Data Link Control
The line is adopted. When this HDLC line is used, the line connection is point-to-point (one-to-one)
Because of the connection, a single master station among multiple master stations becomes the master station and the other master stations become slave stations, only the master station responds to the slave stations, and the slave station only receives signals. Has become. When a state change occurs in the power system, the state change information associated with this state change is transmitted from the slave station to each master station, and each master station determines whether or not an accident has occurred in the power system. Only the master station among the parent stations transmits the response information to the child stations. Further, the power system is operated based on the state change information input to each master station.

[0003]

However, in the above prior art, the information of the slave station is transmitted to each master station, the power system is operated based on the input information of each master station, and only the master station of the master stations is operated. However, when each master station inputs normal information, there is no problem even if the power system is operated based on the input information of each master station.
When the slave station receives a reception error and the master station inputs the state change information in a normal state, response information according to the reception information of only the master station is transmitted to the slave station. That is, the content of the received information of the slave station is not reflected, the response information according to the input information of the master station is transmitted to the slave station, and if the power system is operated according to the input information of the master station and the slave station, the input information of both will be different. Therefore, it may cause trouble.

An object of the present invention is to input power from a power system until the input information of the master station and the slave station of the master station are different from each other when the input information of the master station and the slave station are different from each other. It is to provide a system information input method and an apparatus thereof.

[0005]

In order to achieve the above object, the present invention provides, as a first method, a plurality of master stations classified into a master station and a slave station and a child for monitoring the state of a power system. A station is connected via an information transmission line, and when a state change occurs in the power system, the state change information accompanying this state change is output from the slave station to the information transmission line, and the state change from this information transmission line In the power system information input method in which the master station that receives the information processes the received information, the master station among the master stations requests the slave station to communicate the received information each time the slave station receives the state change information. In response to a request from the master station, the slave station sequentially transmits the reception information from the slave stations to the master station, and the master station that receives the reception information of the slave station transmits the response information that reflects the reception information of the slave station to the slave station. To the station It is obtained by employing the power system information input method comprising.

As a second method, a plurality of master stations classified into a master station and a slave station and a slave station that monitors the state of the power system are connected via an information transmission line, and the state changes in the power system. In the electric power system information input method, the status change information associated with this status change is output from the slave station to the information transmission line when the error occurs, and the master station that receives the status change information from this information transmission line processes the received information. , The master station of the parent stations requests the slave station to communicate the reception information each time the slave station inputs the status change information, and the slave station receives the reception information from the slave station in response to the request from the master station. The master station, which sequentially transmits the information to the master station and receives the reception information of the slave station, compares the reception information of its own station with the reception information of the slave station, and when the contents of the reception information of both are different from this comparison result, Condition Power system information characterized by transmitting response information prompting the resending of change information to the slave station, and the slave station receiving this response information again transmitting state change information having the same contents as the previously transmitted state change information. The input method is adopted.

As a third method, a plurality of master stations classified into a master station and a slave station and a slave station that monitors the state of the power system are connected via an information transmission line, and the state changes in the power system. In the electric power system information input method, the status change information associated with this status change is output from the slave station to the information transmission line when the error occurs, and the master station that receives the status change information from this information transmission line processes the received information. , The master station of the parent stations requests the slave station to communicate the reception information each time the slave station inputs the status change information, and the slave station receives the reception information from the slave station in response to the request from the master station. The master station, which sent information to the master station in sequence and received the received information of the slave station, compares the received information of its own station with the received information of the slave station. Is different As a reception error has occurred in the period,
A power system characterized by transmitting response information prompting the resending of state change information to a slave station, and the slave station receiving this response information again transmitting state change information having the same contents as the previously transmitted state change information. This is an information input method.

As a fourth method, a plurality of master stations classified into a single master station and a plurality of slave stations and a slave station for monitoring the state of the power system are connected via an information transmission line,
When a state change occurs in the power system, state change information associated with this state change is output from the slave station to the information transmission line, and the master station that receives the state change information from this information transmission line processes the received information. In the power system information input method, the master station among the master stations requests each slave station to communicate the reception information every time the slave station inputs the state change information, and each slave station responds to the request from the master station. In response, the reception information from the slave stations is sequentially transmitted to the master station, and the master station receiving the reception information of each slave station compares the reception information of its own station with the reception information of each slave station, and If there is a difference in the contents of the reception information between the two from the comparison result, the response information prompting the resend of the state change information is transmitted to the slave station, and the slave station receiving this response information has the same state change information as previously transmitted. Content It is obtained by employing the power system information input method characterized by transmitting the status change information again.

As a first device, a slave station for monitoring the state of the electric power system, and a plurality of master stations classified into a master station and a slave station and connected to the slave station via an information transmission line are provided. In the slave station, information input means for inputting state change information associated with this state change when the state changes in the power system, and information output means for outputting the input information of the information input means to the information transmission line, The information storage means for storing the output information of the information output means, the information receiving means for receiving the information from the master station, and the information stored in the information storage means when the information receiving means receives the response information prompting the retransmission. An information resending means for selecting the information designated by the response information and outputting it to the information transmission line is provided, and the master station has a first information inputting means for inputting information from the slave station and a first information inputting means. Means input state change information A first transmitting means for transmitting the information for requesting the communication of the reception information to the slave station for each that, a first receiving means for receiving information from the slave station,
When the receiving information of the first receiving means and the input information of the first information inputting means are compared to determine whether or not the contents of both are the same, and when a negative determination result is obtained by the determining means Information output means for outputting response information for prompting retransmission of the state change information to the information transmission line is provided, and the slave station receives second information input means for inputting information from the slave station and first transmission means for transmitting information. Second receiving means for receiving the information;
The power system information input device is provided with a second transmitting unit that transmits the input information of the second information input unit to the first receiving unit in response to the received information of the receiving unit.

As a second device, a slave station for monitoring the state of the power system, a plurality of master stations classified into a master station and a slave station and connected to the slave station via an information transmission line, and the information transmission. A remote typewriter connected to the slave station via a line, the slave station, when the state of the power system changes, information input means for inputting state change information accompanying this state change, The information output means for outputting the input information of the information input means to the information transmission line, the information storage means for storing the output information of the information output means, the information receiving means for receiving the information from the master station, and the information receiving means for resending The information retransmitting means for selecting the information designated by the response information from the information stored in the information storing means and outputting it to the information transmission line when the response information prompting the
First information input means for inputting information from the slave station, and first transmission for transmitting information for requesting communication of received information to the slave station every time the first information input means inputs state change information Means and first for receiving information from a slave station
The receiving means, the determining means for comparing the received information of the first receiving means and the input information of the first information inputting means for determining whether or not the contents of both match, and a negative determination result is obtained by the determining means. And a second information input means for inputting information from the slave station to the slave station, and a first information input means for outputting information from the slave station to the information transmission line. Second receiving means for receiving information from the transmitting means, and second transmitting means for transmitting the input information of the second information input means to the first receiving means in response to the received information of the second receiving means are provided. The remote typewriter has recording means for recording information from the slave station, third receiving means for receiving information from the first transmitting means, and recording information of the recording means in response to the receiving information of the third receiving means. And third transmitting means for transmitting the It is is obtained by constituting the power system information input device has.

As a third device, a slave station for monitoring the state of the electric power system, and a plurality of master stations classified into a master station and a slave station and connected to the slave station via an information transmission line are provided. In the slave station, information input means for inputting state change information associated with this state change when the state changes in the power system, and information output means for outputting the input information of the information input means to the information transmission line, The information storage means for storing the output information of the information output means, the information receiving means for receiving the information from the master station, and the information stored in the information storage means when the information receiving means receives the response information prompting the retransmission. An information resending means for selecting the information designated by the response information and outputting it to the information transmission line is provided, and the master station has a first information inputting means for inputting information from the slave station and a first information inputting means. Means input state change information A first transmitting means for transmitting the information for requesting the communication of the reception information to the slave station for each that, a first receiving means for receiving information from the slave station,
There is an error in the received information by the judging means for judging whether or not an error has occurred in the received information by comparing the plurality of received information of the first receiving means with the plurality of input information of the first information input means. Second information for inputting information from the slave station to the slave station, and information output means for outputting to the information transmission line response information prompting retransmission of the state change information when a determination result to that effect is obtained Input means, second receiving means for receiving information from the first transmitting means, and second transmitting means for transmitting the input information of the second information input means to the first receiving means in response to the received information of the second receiving means. And a means for providing a power system information input device.

[0012]

According to the above-mentioned means, when the status change information accompanying the status change of the power system is transmitted from the slave station to each master station,
First, of the master stations, the master station requests the slave station to communicate the received information each time the slave station receives the state change information. Then, the slave station responding to this sequentially transmits the reception information to the master station. And the master station compares the received information from its own station with the received information from the slave station,
When the contents of the received information are different from each other, the response information prompting the retransmission of the state change information is transmitted to the slave station. Upon receiving this response information, the slave station transmits again the state change information having the same contents as the previously transmitted state change information to each master station. Even when this information is input to each parent station, the master station requests the slave station to communicate the received information each time the information is input, and repeats the above-described processing. Therefore, when the input information of the master station is different from that of the slave station, the same status change information is transmitted from the slave station to each master station until the master station and the slave station have the same input information. You can enter the same information. Therefore, it is possible to increase the reliability in operating the power system according to the power system information input to the master station and the slave station.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a slave station is provided in the power system 10, and a slave station device 12 is arranged in this slave station. The slave station device 12 is connected to the line branching device 18 of the power system monitoring system 16 via the HDLC line 14, and when the state of the power system 10 changes, the state change information accompanying the state change is displayed. The data is transmitted to a plurality of master stations via the HDLC line 14 and the line branching device 18. Then, in order to exchange information with the master station and input the state of the power system 10 to the slave station device 12,
Information input means for inputting state change information accompanying the state change when the state changes in the power system, information output means for outputting the input information of the information input means to the HDLC line 14, and information output means Of the output information of the master station, the information receiving means for receiving the information from the master station via the HDLC line 14, and the information storing means when the information receiving means receives the response information prompting the retransmission. The HDLC line 14 is selected by selecting the information specified by the response information from the information.
And information retransmitting means for outputting the information to each of these means are constituted by a microcomputer.

On the other hand, the power system monitoring system 16 includes a line branching device 18, parent station devices 20 and 22 connected to the line branching device 18, local network devices 24 connected to the respective parent station devices 20 and 22, A CRT 26 and a remote typewriter 28 connected to the local network device 24 are provided. The master station device 20 serves as a master station among the master stations.
Reference numeral 2 constitutes a slave station. Then, the master station device 20 receives first information input means for inputting information from the slave station device 12 and communication of received information to the master station device 22 each time the first information input means inputs state change information. And a first transmitting means for transmitting information for requesting a request via the local network device 24 and a first transmitting means for receiving information from the master station device 22 through the local network device 24.
The receiving means, the determining means for comparing the received information of the first receiving means and the input information of the first information inputting means for determining whether or not the contents of the both match, and a negative determination result by this determining means. An information output means is provided for outputting the response information for prompting the resending of the state change information to the HDLC line 14 via the line branching device 18 when obtained. The master station device 22 as a slave station receives the information from the slave station device 12 via the HDLC line 14 and the line branching device 18 from the second information input means and the first transmitting means of the master station device 20. A second receiving means for receiving the transmitted information via the local network device 24, and a master station device for receiving the input information of the second information input means via the local network device 24 in response to the received information of the second receiving means. 20 second receiving means for transmitting to the first receiving means. Each means of each master station is composed of a microcomputer.

In the remote typewriter 28, recording means for recording information from the slave station device 12 and the master station device 2 are provided.
Third receiving means for receiving the information transmitted from the first transmitting means of 0 via the local network device 24;
There is provided third transmitting means for transmitting the record information of the recording means to the first receiving means of the master station device 20 via the local network device 24 in response to the reception information of the receiving means.

Next, the operation of this embodiment will be described with reference to FIGS. First, the slave station device 12 monitors the state of the electric power system 10, and when a state change occurs in the electric power system 10, as shown in FIG.
Is transmitted to each master station via the HDLC line 14. When the state change information is, for example, information indicating that the circuit breaker in the power system 10 is turned off, packet information P1 indicating that the circuit breaker is turned off is output as shown in FIG. It will be. This packet information P
When 1 is transmitted to each master station, the status change information 100 is received by each master station as status change information 102 and 104 (steps S1 and S11). Then, each master station device 20, 22 determines whether the received information is normal (steps S2, S12). At this time, if there is an error in the information received by the master station device 20, a resend request is returned to the slave station device 12 (step S6). When an error occurs in the reception information in the master station device 22, a process of turning on the reception flag is performed (step S13). On the other hand, when the information received by the master station device 20 is normal, the master station device 20 outputs the information 106 requesting the master station device 22 to communicate the received information (step S3). When the master station device 22 receives the information 106, the normal reception flag is turned on when the reception information is normal (step S1).
4) The information, and the information when the reception flag is turned on when there is an error in the reception information, is transmitted to the master station device 20 as the reception information 108 (step S15). When the master station device 20 receives the information 108 from the master station device 22 (step S4), the master station device 20 receives the received information of the master station device 22 and the master station device 22.
The contents of the reception information from are compared and it is determined whether or not the contents of both match (step S5).

When the reception information of the master station device 20 and the reception information of the master station information 22 are different from each other, it is assumed that a transmission error has occurred, and the information 11 that prompts the master station device 20 to retransmit to the slave station device 12.
Outputs 0. This information 110 is sent to the slave station device 12 as information 1.
Entered as 12. Further, the master station device 20 and the master station device 2
When the reception information of 2 matches, it is determined that there is no reception error, and the return information indicating that the normal information is received is output from the master station device 20 to the slave station device 12 (step S7). This means that the processing for the packet information P1 has been performed.

Next, when the packet information P2 indicating that the relay for operating the circuit breaker has operated is transmitted from the slave station device 12, the master station device 20 which has received this packet information P2.
Requests the parent station device 22 to notify it of the received information, as in the above-described process. At this time, the master station device 22
When a reception error occurs and the packet information P2 is not received, the information indicating that the packet information P2 is not received is transmitted from the master station device 22 to the master station device 20. The master station device 20 receiving this is different in the received contents of both, and the master station device 22 has a reception error.
The packet information P2 transmitted previously to the slave station device 12 is transmitted.
Outputs the information that the same information as the above is retransmitted. When this retransmission request information is transmitted to the slave station device 12, the packet information P2 is transmitted again from the slave station device 12. Upon receiving this packet P2 information, the master station device 20 again requests the master station device 22 to notify it of the received information. When the received information is the same, the master station device 12 performs normal reception. When the information is returned and the received information is different from each other, the information to retransmit the packet P2 information is transmitted again. These series of processes are continued until the contents of the reception information of the master station device 20 and the master station device 22 match. Therefore, it is possible to prevent the reception information of each master station device 20, 22 from leaking, and to input accurate state change information, and to change the state change information input by each master station device 20, 22. When operating the power system 14 based on
The reliability of the power system monitoring system 16 can be improved.

In the above embodiment, the packet information P
It is possible to determine that a ground fault has occurred in the power system 10 from the information of 1 and P2. Therefore, it is possible to make a retransmission request to the slave station device 12 only when the contents of the plurality of state change information are different.

[0020]

As described above, according to the present invention,
When the status change information is transmitted from the slave station to the master station and the slave station, the master station and the slave station exchange information related to the input information, and the master station responds to the information received by the slave station. Since it is transmitted to the slave station, it is possible to prevent the information input to the master station and the slave station from leaking, and it is possible to input highly reliable state change information.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining a method of transmitting information between a slave station and a master station and a method of transmitting information between the master stations.

FIG. 3 is a time chart for explaining a method of transmitting information between a slave station and a plurality of master stations.

FIG. 4 is a flowchart for explaining the operation of the master station.

FIG. 5 is a flowchart for explaining the operation of a slave station.

[Explanation of symbols]

 10 power system 12 slave station device 14 HDLC line 16 power system monitoring system 18 line branching device 20 master station device (master station) 22 master station device (slave station) 24 local network device 26 CRT 28 remote typewriter

Claims (7)

[Claims] 1. When a plurality of master stations classified into a master station and a slave station and a slave station that monitors the state of the power system are connected via an information transmission line, and the state of the power system changes. In the power system information input method, the state change information associated with this state change is output from the slave station to the information transmission line, and the master station that receives the state change information from this information transmission line processes the received information, Of these, the master station requests the slave station to communicate the reception information each time the slave station inputs state change information, and the slave station responds to the request from the master station and sequentially masters the reception information from the slave stations. A method for inputting power system information, characterized in that a master station, which has received the reception information of a slave station, transmits the response information to the slave station, the response information reflecting the reception information of the slave station. 2. When a plurality of master stations classified into a master station and a slave station and a slave station that monitors the state of the power system are connected via an information transmission line, and the state of the power system changes. In the power system information input method, the state change information associated with this state change is output from the slave station to the information transmission line, and the master station that receives the state change information from this information transmission line processes the received information, Of these, the master station requests the slave station to communicate the reception information each time the slave station inputs state change information, and the slave station responds to the request from the master station and sequentially masters the reception information from the slave stations. The master station, which has received the reception information of the slave station after transmitting it to the station, compares the reception information of its own station with the reception information of the slave station. resend Prompting the response information transmitted to the slave station, the power system information input method which is characterized in that the slave station which has received the response information to transmit the state change information of the same contents as the state change information transmitted earlier again. 3. When a plurality of master stations classified into a master station and a slave station and a slave station for monitoring the state of the power system are connected via an information transmission line, and the state of the power system changes. In the power system information input method, the state change information associated with this state change is output from the slave station to the information transmission line, and the master station that receives the state change information from this information transmission line processes the received information, Of these, the master station requests the slave station to communicate the reception information each time the slave station inputs state change information, and the slave station responds to the request from the master station and sequentially masters the reception information from the slave stations. The master station, which has received the reception information of the slave station after transmitting it to the station, compares the reception information of its own station with the reception information of the slave station. Ella When the slave station receives the response information, the slave station that receives the response information prompts the resend of the state change information to retransmit the same state change information as the previously transmitted state change information. Characteristic power system information input method. 4. A plurality of master stations classified into a single master station and a plurality of slave stations and a slave station that monitors the status of the power system are connected via an information transmission line, and the status is set in the power system. When a change occurs, the state change information accompanying this state change is output from the slave station to the information transmission line, and the master station that receives the state change information from this information transmission line processes the received information Power system information input method In the master station, the master station requests each slave station to communicate the reception information every time the slave station inputs the state change information, and each slave station responds to the request from the master station by the slave station. The master station that has received the reception information of each slave station compares the reception information of its own station with the reception information of each slave station. In the content of the received information When a difference occurs, the response information that prompts the resend of the state change information is transmitted to the slave station, and the slave station that receives this response information transmits again the state change information having the same contents as the previously transmitted state change information. Power system information input method characterized by. 5. A slave station for monitoring a state of a power system, and a plurality of master stations classified into a master station and a slave station and connected to the slave station via an information transmission line, wherein the slave station includes ,
Information input means for inputting state change information accompanying the state change when the state changes in the power system, information output means for outputting the input information of the information input means to the information transmission line, and output of the information output means Information storage means for storing information, information reception means for receiving information from the master station, and response information out of the information stored in the information storage means when the information reception means receives response information for prompting retransmission The information retransmitting means for selecting the selected information and outputting it to the information transmission line is provided, and the master station has the first information inputting means for inputting the information from the slave station and the first information inputting means for the state change information. First transmitting means for transmitting information for requesting contact of the received information to the slave station every time when is input, first receiving means for receiving information from the slave station, and received information of the first receiving means And the first information input Information transmission is performed by comparing the input information of the means with a determination means for determining whether the contents of the two match, and response information for urging the state change information to be retransmitted when a negative determination result is obtained by the determination means. Information output means for outputting to the line is provided, and the slave station has second information input means for inputting information from the slave station, second receiving means for receiving information from the first transmitting means, and second A power transmission system information input device provided with a second transmission means for transmitting the input information of the second information input means to the first reception means in response to the reception information of the reception means. 6. A slave station for monitoring a state of a power system, a plurality of master stations classified into a master station and a slave station and connected to the slave station via an information transmission line, and via the information transmission line. With a remote typewriter connected to the slave station,
In the slave station, information input means for inputting state change information accompanying the state change when a state change occurs in the power system, and information output means for outputting the input information of the information input means to the information transmission line. Information storing means for storing output information of the information output means, information receiving means for receiving information from the master station, and information stored in the information storing means when the information receiving means receives response information for prompting retransmission. An information resending means for selecting the information designated by the response information and outputting it to the information transmission line, and the master station includes a first information inputting means for inputting information from the slave station and a first information First transmitting means for transmitting information for requesting communication of received information to the slave station every time the input means inputs state change information;
First receiving means for receiving information from the slave station;
A judging means for judging whether or not the contents of both are matched by comparing the received information of the receiving means and the input information of the first information inputting means, and the state change when a negative judgment result is obtained by the judging means. Information output means for outputting response information for prompting retransmission of information to the information transmission line is provided, and the slave station receives second information input means for inputting information from the slave station and information from the first transmission means. The remote typewriter is provided with second receiving means for receiving and second transmitting means for transmitting the input information of the second information input means to the first receiving means in response to the received information of the second receiving means. Recording means for recording information from the slave station, third receiving means for receiving information from the first transmitting means, and recording information of the recording means to the first receiving means in response to the received information of the third receiving means. Electric power provided with a third transmitting means for transmitting Integrated information input device. 7. A slave station for monitoring a state of a power system, and a plurality of master stations classified into a master station and a slave station and connected to the slave station via an information transmission line, wherein the slave station is ,
Information input means for inputting state change information accompanying the state change when the state changes in the power system, information output means for outputting the input information of the information input means to the information transmission line, and output of the information output means Information storage means for storing information, information reception means for receiving information from the master station, and response information out of the information stored in the information storage means when the information reception means receives response information for prompting retransmission The information retransmitting means for selecting the selected information and outputting it to the information transmission line is provided, and the master station has the first information inputting means for inputting the information from the slave station and the first information inputting means for the state change information. A plurality of first receiving means for transmitting information for requesting communication of received information to the slave station each time the input is input, first receiving means for receiving information from the slave station, and a plurality of first receiving means. Received information and first A determination unit that determines whether or not an error has occurred in the received information by comparing a plurality of input information of the report input unit, and a state change when a determination result that the received information has an error is obtained by the determination unit. An information output means for outputting response information for prompting the resending of information to the information transmission line, and the slave station receives the information from the slave station.
An information inputting means, a second receiving means for receiving information from the first transmitting means, and a second receiving means in response to the received information of the second receiving means.
A second for transmitting the input information of the information input means to the first receiving means,
A power system information input device provided with a transmission means.