JPH0954738A - Information transmitter for electric power system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the congestion transmission data in a LAN even when a multiplex trouble occurs and the state information has a multiplex change in the LAN. SOLUTION: The data are monitored in a LAN by a transmission data quantity monitoring means 1-12, and the transmission cycle of the on-line data which are always transmitted in a fixed cycle by a measurement value data transmission means 1-10 is delayed while the data exceeds a fixed quantity in the LAN like in a multiplex trouble mode, etc. Thus, the quantity of measurement value data which are transmitted in the LAN can be reduced, and the load on LAN can also be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a host computer for transmitting / receiving information to / from field equipment in a power system such as a power distribution system.
The present invention relates to a power system information transmission device configured by a computer having a man-machine interface function (hereinafter referred to as an MMI computer) connected via N, and particularly to a power system information transmission device configured to perform LAN load control.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing a functional block when transmitting online data from a host computer to an MMI computer in a conventional apparatus. In FIG. 6, the distribution line breaker, the division switch, the protection relay, and other field devices in the distribution system are turned on and off. When the operating state changes, data indicating state information about the changed device (hereinafter referred to as monitoring data). )
Is transmitted as monitoring data from the remote monitoring control device 1-1 to the host computer 1-2. Then, this monitoring data is received by the monitoring data receiving means 1-3 of the host computer 1-2, and then stored in the monitoring data storage file 1-4. The monitoring data storage file 1-4 is, for example, as shown in FIG. 7A, address data indicating which device on the site the data is, and the “ON / OFF” of the device with the address data at the head. , "Operation / Return", "Attachment status", "Other incidental information" are defined for each bit, and it is a data file that has information indicating the status as "1" or "0" for each device. is there. Monitoring data transmission means 1-
Reference numeral 5 is a monitor 1-6 connected to the MMI computer so that an operator can edit the data to be displayed so that the monitoring data can be recognized, and the data can be transmitted to a designated MMI computer via a LAN.
Transmission is performed via the transmission means 1-7 and the LAN.

The host computer 1-2 has a load current value (hereinafter measured value) flowing from the remote monitoring and control apparatus 1-1 to distribution line breakers, section switches, etc. at all sites under the control of the system. Described) is always transmitted at a fixed cycle. The measurement value receiving means 1-8 receives this measurement value and stores it in the measurement value data file 1-9. An example of this measurement value data file 1-9 is as shown in FIG.
This is a data file that has, for each device, address data indicating which device on the site the data is, and measurement value data of the device for each device.

The measurement value data transmitting means 1-10 reads and edits the measurement value data from the measurement value data file 1-9 at a fixed cycle, and the MMI computer 1-designated via the LAN transmitting means 1-7. Send to 6.

As described above, the monitoring data is transmitted to the host computer 1-2 via the distant monitoring control device 1-1 each time a state change occurs in the equipment on the site, and the distribution line circuit breaker and the section switch at the site are also transmitted. The measured value data such as is transmitted to the host computer 1-2 via the remote monitoring and control device at regular intervals. Of the received data, the host computer 1-2 transmits the monitoring data each time it is received and the measured value data to the computers 1 ...

In such a system, when a large number of changes in the equipment status occur in the field such as a distribution line multiple accident, the host computer 1-2 receives a large amount of monitoring data in a short time, each time. LAN from host computer 1-2
Since the data is transmitted to the upper side, the data transmission on the LAN is congested. In such a case, the number of control operations performed by the operator from an operator console having an MMI calculator (hereinafter referred to as an operator console) is large, and therefore data transmitted from the calculators 1 ... n on the operator console to the host computer 1-2 via the LAN. Also increases.

[0007]

As described above, in the prior art, the host computer transmits all the data received from the remote monitoring and control device to the computer on the operation desk as it is. Etc., the amount of data transmitted from the remote monitoring and control device increases, so LAN
Since the above data transmission is likely to be congested and the control data from the operator console is more than usual, the data transmission on the LAN is further congested and the responsiveness from the operator console is deteriorated.

The present invention is to solve the above-mentioned problem, and provides an information transmission device of a power system in which load response of a LAN is controlled so as not to reduce the responsiveness to the operation of an operator even when multiple accidents occur. The purpose is to get.

[0009]

As shown in FIG. 1, a distribution system control device according to the first aspect of the present invention is a transmission data amount storage file 1 for storing the amount of data to be transmitted on a LAN in a conventional device. -11 and a transmission data amount monitoring means 1 for monitoring the transmission data amount storage file 1-11 at regular intervals.
-12, a transmission cycle save file 1-13 for saving the transmission cycle of the measurement value data transmitting means 1-10, and the current LA
Transmission mode 1 indicating whether the load of N is high
14 (hereinafter, the normal mode is used when the LAN load is normal, and the high load mode is used when the data transmission is congested).

By the means of "Claim 1", the transmission cycle of the measurement value data transmitted from the host computer to the LAN at a fixed cycle can be changed according to the load of the LAN.

As shown in FIG. 4, the distribution system control device according to the "claim 2" of the present invention refers to the transmission mode 1-14 to reduce the transmission data amount of the monitoring data 2-1.
It is provided with. By the means of "claim 2", the transmission amount of the monitor data transmitted from the host computer to the LAN can be changed according to the load of the LAN.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) First, the configuration of an embodiment of a power distribution system control device according to "claim 1" of the present invention will be described.

In FIG. 1, the same reference numerals are given to the means, parts and the like explained in FIG. 6 and duplicate explanations are omitted. This embodiment is different from the conventional function of the host computer.
A transmission data amount storage file 1-11, a transmission data amount monitoring means 1-12, a transmission cycle storage file 1-13, and a transmission mode 1-14 are newly added.

The operation of this embodiment will be described with reference to FIGS. 1, 2 and 3. The measurement value data receiving means 1-8 receives and processes the measurement value data of the field device transmitted from the distant monitoring control device at regular intervals and saves it in the measurement value data saving file 1-9. The measurement value data storage file 1-9 is constructed so that the latest data is always stored by overwriting.

The measurement value data transmitting means 1-10 is started based on the cycle time stored in the transmission cycle storage file 1-13, reads the data in the measurement value data storage file 1-9, edits it, and transmits it to the LAN. LA via means 1-7
Send data to N. This measurement value data transmission means 1-
A method of changing the transmission cycle of 10 will be described below.

The LAN transmission means 1-7 stores the data amount to be transmitted on the LAN in the transmission data amount storage file 1-11. The processing flow of the LAN transmitting means at this time will be described with reference to FIG. After sending the data to the LAN (2
S-1), the numerical value (assumed to be a) stored in the transmission data amount storage file 1-11 is taken out (2S-2), and the data amount transmitted this time is added to the stored numerical value a (2S- 3) Then, the value b after this addition is stored in the transmission data amount storage file 1-11 (2S-4). The transmission data amount monitoring means 1-12 monitors the transmission data amount in this transmission data amount storage file 1-11 at regular intervals, and after reading it, clears the contents of this file.

Next, FIG. 3 shows a processing flow of the transmission data amount monitoring means 1-12. Transmission data amount monitoring means 1-1
2 reads the transmission data amount save file 1-11 (3
S-1), it is judged whether or not the data amount exceeds a fixed value (amount that can be transmitted on the LAN without traffic on a fixed time) (3S-2), and it is judged that it exceeds (YES), and the data is transmitted. If the mode 1-14 is determined to be the normal mode in step 3S-3 (YES), the transmission mode 1-14 is set as the high load mode step (3S-4) and the transmission cycle saving file 1
The cycle time stored in -13 is rewritten to an extended value (3S-5).

In step 3S-2, the transmission data amount exceeds a certain value (YES), but in step 3S-3, when the transmission mode is not the normal mode but is already in the high load mode (NO), the transmission cycle is Do not change.

In step 3S-2, if the amount of data to be transmitted is less than a certain value (NO), it is judged in step 3S-6 whether the transmission mode is the high load mode, and if it is the high load mode (YES), step 3S. At -7, the transmission mode 1-14 is set to the normal mode. And next step 3S
At -8, the cycle time stored in the transmission cycle save file 1-13 is set to the normal cycle.

When the amount of transmission data does not exceed the fixed value in step 3S-2 and the transmission mode is the normal mode (NO in step 3S-6), the transmission cycle is not changed. After the above processing, send data amount save file 1
The data of -11 is cleared (3S-9).

According to the present embodiment described above, the amount of data to be transmitted to the LAN is constantly monitored, and when the load on the LAN becomes high, the transmission cycle of the measurement value data transmitted at regular intervals is extended. Causes the measured value data to be LA
The amount sent on N is reduced, reducing the load on the LAN.

(Embodiment 2) Next, an embodiment of a power distribution system control device according to claim 2 of the present invention will be described with reference to FIG. In this embodiment, when the LAN load becomes high as shown in FIG. 1, instead of extending the transmission cycle of the measurement value data, the transmission mode is higher than that of the host computer 1-2 shown in FIG. In the load mode, the monitoring data reducing means 2-1 for editing the transmission data excluding data other than data essential for control / monitoring is added.

The operation of this embodiment will be described with reference to FIGS. 4 and 5. The monitoring data receiving unit 1-3 stores the monitoring data transmitted from the remote monitoring control device 1-1 in the monitoring data storage file 1-4, and activates the monitoring data transmitting unit 1-5. The method by which the monitoring data transmitting means 1-5 changes the data transmission amount will be described below.

As described above, the monitoring data is data indicating the state of the equipment of the power distribution system. However, in the event of a large-scale accident, such as data regarding the operation / return of relays, the operator can grasp the system, There are incidental data that are not always necessary for controlling. When the LAN has a high load, it is not preferable that the transmission of such data causes congestion of essential control data and data necessary for grasping the system. Therefore, in the present invention, the transmission amount of the monitoring data is adjusted as follows. The processing at this time will be described with reference to FIG.

The monitoring data transmitting means 1-5 reads the monitoring data from the monitoring data storage file 1-4 (S5-
1), referring to the transmission mode 1-14 in step S5-2, if the high load mode (YES), the monitoring data deleting means 2
-1 is started, and the monitoring data deleting means 2-1 edits the monitoring data by judging and deleting the incidental data based on the information definition for each bit of the monitoring data as described in the prior art. S5-3).

The judgment in step S5-2 is NO in normal mode.
Then, all the data read from the monitoring data save file 1-4 is edited (S5-4). The edited data is L
Data is transmitted via the AN transmission means 1-7 (S5-
5).

As described above, according to this embodiment, the amount of data transmitted on the LAN is constantly monitored, and when the load on the LAN becomes high, the transmitted monitoring data is reduced,
The load on the LAN can be reduced.

[0028]

As described above, according to the present invention, L
It is possible to reduce the congestion of data on the LAN by constantly monitoring the amount of data transmitted to the AN and reducing the measurement value data and / or the monitoring data when the load on the LAN becomes high. Since this is possible, it is possible to prevent deterioration of responsiveness to the operation of the operator even when multiple accidents occur in the power system.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a first embodiment according to the present invention,

FIG. 2 is a processing flowchart when the LAN transmission means stores data in a transmission data amount storage file,

FIG. 3 is a processing flowchart of a transmission data amount monitoring means,

FIG. 4 is a functional block diagram showing a second embodiment according to the present invention,

FIG. 5 is a flowchart of a monitoring data transmission process according to claim 2;

FIG. 6 is a conventional functional block diagram,

FIG. 7 is a configuration diagram of monitoring data and measurement value data.

[Explanation of symbols]

 1-1 Remote monitoring device 1-2 Host computer 1-3 Monitoring data receiving device 1-4 Monitoring data file 1-5 Monitoring data transmitting device 1-6 Monitor 1-7 ...... LAN transmitting means 1-8 …… Measurement value data receiving means 1-9 …… Measurement value data file 1-10 ・ ・ ・ Measurement value data transmitting means 1-11 ・ ・ ・ Transmission data amount storage file 1-12 ・ ・ ・ Transmission data amount monitoring Means 1-13 ... Transmission cycle saving file 1-14 ... Transmission mode 2-1 ... Monitoring data reducing means

Claims (2)

[Claims] 1. An information transmission device of a power system configured by transmitting / receiving information to / from a power system device by a host computer, and connecting a computer having a man-machine interface function to the host computer via a LAN. A means for monitoring the amount of data transmitted on the LAN by the host computer when transmitting data indicating the state of the power system device from the host computer to the computer having the man-machine interface function via the LAN; By reducing the amount of data transmitted from the host computer to the computer with the man-machine interface function by providing a means to extend the transmission period of online data that is constantly transmitted at a constant period while the value exceeds the fixed value. An information transmission device for a power system, characterized by: 2. An information transmission device of a power system configured to transmit / receive information to / from a power system device by a host computer, and connect the host computer to a computer having a man-machine interface function via a LAN. A means for monitoring the amount of data transmitted from the host computer to the LAN when transmitting the data indicating the state of the power system device from the host computer to the computer having the man-machine interface function via the LAN; While the amount exceeds a certain value, by providing a means to interrupt the transmission to the computer with the man-machine interface function other than the data that is essential for monitoring and control,
An information transmission device of a power system characterized by reducing the amount of data.