JP3272013B2 - Remote monitoring control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention performs a transmission protocol process using a high-level data link (hereinafter referred to as an HDLC transmission procedure), and monitors between a control station (master station) and a controlled station (slave station). , A remote monitoring and control device for transmitting and receiving information necessary for control and monitoring and controlling a controlled device in a remote monitoring and control device for transmitting data for adjusting the time between a master station and a slave station from the master station to the slave station. It relates to a control device.

[0002]

2. Description of the Related Art For example, in a power supply network, four to five substations or power stations are integrated as one group, and
One control station monitors the operation of each substation or power station. Each control station is connected to a central monitoring station via a communication line, and exchanges data with the central monitoring station to control power supply and distribution. If an accident occurs at a substation or power plant, for example, when a circuit breaker is cut off, the occurrence of the accident is transmitted to the control station, where the post-accident processing is performed. Inform the watch station. When trying to analyze the cause of the accident,
It would be nice if the order of the accidents could be clarified. For this purpose, conventionally, a clock device that detects a time signal transmitted by radio broadcast by a time signal detection device and automatically calibrates the clock based on the detected signal is disposed at a controlled site such as each substation, and an accident occurs. At the same time, read the time data from this clock device,
It was added to the accident data and transmitted to the control center.

[0003]

Although a clock device for automatically calibrating a clock based on a time signal transmitted by radio broadcasting at a substation such as each substation is arranged, the number of such substations is equal to the number of substations. Installing a clock device is economically burdensome. Further, even if a clock device for automatically calibrating a clock based on a time signal transmitted by radio broadcasting is arranged at each controlled station, there may be a case where radio broadcasting cannot be received depending on the controlled station. Therefore, it may not be possible to arrange a clock device that automatically calibrates the clock based on the time signal sent by the radio broadcast.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and does not require a clock device for automatically calibrating a clock based on a time signal sent by radio broadcast for each controlled site, and allows the controlled site to be controlled between the controlled sites. It is an object of the present invention to provide a remote monitoring control device that can improve the accuracy of time setting.

[0005]

In order to solve the above-mentioned problems, the present invention carries out a transmission protocol process in accordance with an HDLC transmission procedure to control a control station (master station) and a plurality of controlled stations (slave stations).
The information necessary for monitoring and control is transmitted between
In a remote monitoring control device that installs a master clock device only in the master station and sets the time between the master station and the slave station, the master station retrieves the current time from the master clock device and stores the current time. Time or when there is a request for time alignment data from each slave station, the current time is retrieved from the storage unit and
Means for transmitting the time adjustment data to each slave station in the C procedure, and a time obtained by adding one minute to the time previously stored in the storage unit when a minute pulse is input from the master clock device to the internal clock. Means for notifying the timing of time calibration with a global address and a non-number information frame defined in the HDLC transmission procedure for all slave stations. Means for receiving and storing the adjusted data and the time calibration timing, and means for certifying the time obtained by adding one minute to the stored time adjusted data on condition that the time calibration timing data is received as the current time of the slave station. .

[0006]

First, the control station (master station) takes in time data from the clock device and transmits it to the controlled station (slave station) in advance. Next, the master station transmits time calibration timing data to the slave station at regular intervals (for example, every minute) using the non-number information frame of the global address. On the other hand, in the slave station, the time data sent from the master station is stored in advance, and when the time calibration timing data is next received from the master station, the timing is set to the correct minute, and the stored time data is stored in the internal clock. Set to. Thereafter, every time the time calibration timing data is received in a one-minute cycle, the timing is set to the minute and the internal clock is calibrated.

[0007]

FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 11 denotes a master clock device. This master clock device automatically calibrates the clock based on a time signal flowing in a radio broadcast, and outputs a current time (year, month, day, minute, second) and a pulse output at every minute. The control station (master station) 12 and the controlled stations (slave stations) 1 to n (13 to 16 in the figure) have the configuration shown in FIG. The current time and each minute pulse are taken into the input / output port 26 of the control center 12. First, the control center 12 fetches the current time via the input / output port 26 at regular intervals (for example, every minute) and stores it in the RAM 25. Next, when the next minute pulse is received from the input / output port 26, R
The master station internal clock 22 is calibrated by setting, in the internal clock 22, a minute minute obtained by adding one minute to the time stored in the AM 25. In addition, the control station 12 is connected to each of the controlled
When the time adjustment of n (13 to 16 in the figure) is performed, data requesting transmission of the current time from each of the controlled sites 1 to n (13 to 16 in the figure) via the transmission unit 21 according to the HDLC transmission procedure. Is input, or at regular intervals (for example, every hour), the current time is extracted from the internal clock 22 of the master station, and the time is adjusted in accordance with the HDLC transmission procedure for the controlled sites 1 to n (13 to 16 in the figure). Transmit data. Each time the master station takes in a minute pulse from the input / output port 26, it sends a global address and a non-number information frame defined in the HDLC transmission procedure to the controlled sites 1 to n (13 to 16 in the figure). Also transmits time calibration timing data for notifying the timing of time calibration. The global address can be realized by setting a code of the global address in the address field, and the non-number information frame can be realized by setting a command.

On the other hand, controlled places 1 to n (13 to 16 in the figure)
When the time adjustment data is received from the control center 12 via the transmission unit 21 according to the HDLC transmission procedure, the received time adjustment data is stored in the RAM 25 and
At the time when the time calibration timing data is fetched in accordance with the HDLC transmission procedure from the transmission unit 21 via the transmission unit 21, the RAM 2
5 is set to the internal clock 22 by the minute which is obtained by adding one minute to the time adjustment data stored in the internal clock 22. After that, control station 1
2, every time the time calibration timing data is taken in according to the HDLC transmission procedure via the transmission unit 21, the internal clock 22
Calibration is performed at the time of the minute obtained by adding the time of 1 minute.

Although the embodiment in which the control station and the controlled station have a one-to-N configuration has been described above, the present system is not limited to this range. Even in the N-to-M HDLC transmission procedure, there is no restriction on transmitting the time calibration timing data using the UI command / response. Next, the operation of the remote monitoring control device having the above configuration will be described with reference to the flowcharts shown in FIGS. FIG. 3 shows the operation of the control station, and FIG. 4 shows the operation of the controlled station.

First, the control station 12 shown in FIG. 1 stores the current time from the input / output port 26 in the RAM 25 at step S31. In step S32, it is determined whether it is a fixed time (for example, every hour) or whether there is a request for time adjustment data from each controlled station. If the result is positive, the master clock is input via the input / output port 26 in step S33. From the control points 1 to n (13 to 1 in FIG. 1).
6) The time adjustment data is transmitted via the transmission unit 21 in accordance with the HDLC transmission procedure. In step S34, the process waits until a correct pulse is input to the input / output port 26. If there is a pulse input, R is set in step S35.
The minute time obtained by adding one minute to the time stored in the AM 25 is set in the internal clock 22, and in step S36, the transmission unit 21 is transmitted to each of the controlled sites 1 to n (13 to 16 in FIG. 1). Via the global address defined in the HDLC transmission procedure and the non-numbered information frame, time calibration timing data indicating the timing of time calibration is transmitted.

On the other hand, each of the controlled stations 1 to n (13 to 16 in the figure) shown in FIG. 1 determines in step S41 whether or not the time setting data has been received from the control station 12 in accordance with the HDLC transmission procedure via the transmission section 21. If the result is positive, the received time alignment data is stored in the RAM 25, and if the result is false, the current time is read from the internal clock 22 and stored in the RAM 25 in step S43. In step S44, the process waits until the time calibration timing data is received from the control center 12 via the transmission unit 21 in accordance with the HDLC transmission procedure. When the time calibration timing data is received, the time stored in the RAM 25 is incremented by one at step S45. The minute time with the minute added is set in the internal clock 22.

As is clear from the above embodiment, when the time of each controlled station such as a substation monitored and controlled by one control station is adjusted, a master clock device is installed only in the control station, and By synchronizing the time of the control station with the time adjustment data from the control station and the time calibration timing data, the economical burden of installing a clock device for each controlled station can be avoided.

[0013]

As described above, according to the present invention, 1
When adjusting the time of each controlled station such as a substation that is monitored and controlled by two control stations, there is no need to arrange a clock device that automatically calibrates the clock based on the time signal sent by radio broadcast for each controlled station Since the time can be set, a remote monitoring control device that eliminates the problem that radio broadcasts cannot be received by controlled sites and eliminates the economic burden of installing clock devices by the number of controlled sites. Can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a remote monitoring control device according to the present invention.

FIG. 2 is a simple configuration diagram of a control station and a controlled station in FIG. 1;

FIG. 3 is a flowchart for explaining the operation of the control station.

FIG. 4 is a flowchart for explaining the operation of a controlled place.

[Explanation of symbols]

 11 Master clock device 12 Control station (master station) 13-16 Controlled station (slave station)

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-214398 (JP, A) JP-A-3-103797 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04Q 9/00

Claims (1)

(57) [Claims] 1. A performs transmission protocol processing according to HDLC transmission procedure, control stations monitor between the (master station) and a plurality of controlled locations (the slave station), the transmission and if UTO both the information necessary to control
In addition, a master clock device is installed only in the master station, and between the master station and the slave station.
In the remote monitoring control device that adjusts the time in the master station, the master station extracts and stores the current time from the master clock device.
The storage unit and the time adjustment data
When a request is made, the current time is taken out of the storage unit and H
Transmit the time alignment data to each slave station according to the DLC procedure
Means for inputting a minute pulse from the master clock device.
The time obtained by adding one minute to the time stored in the storage unit in advance
Set the internal clock and transmit HDLC to all slave stations.
Global address and unnumbered information defined in the
Means for notifying the timing of time calibration in the information frame
Each slave station has a time adjustment data from the master station.
Means for receiving and storing data and time calibration timings;
The above-mentioned stored under the condition of receiving the time calibration timing data
The time obtained by adding one minute to the time adjustment data is the current
A remote monitoring control device comprising: means for certifying the time .