JPH0655012B2 - Remote monitoring controller for pole switch - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a distant monitoring control device for monitoring and controlling a pole switch for distribution lines from a distant place, and particularly to a control station (hereinafter, referred to as a control station).
An improvement of a remote monitoring control device for pole switches, which is configured by connecting a master station) and a plurality of controlled stations (hereinafter, slave stations) that monitor and control pole switches by a transmission path. It is about.

[Technical background of the invention] Generally, a pole switch for a distribution line in a distribution system is provided for the purpose of system switching due to load accommodation and separation of an accident section to reduce a power failure area. It has been restored by the work in. However, in recent years, it has been attempted to shorten the power outage time and the power outage area by remotely monitoring and controlling the corresponding pole switch using a remote monitoring control device. Further, this type of conventional remote monitoring control device for pole switches is a plurality of slaves that monitor and control the master station and pole switches that are connected by a pair of transmission lines having different downlink signal frequencies and uplink signal frequencies. It is configured to include a station, and cyclically polls the slave stations in accordance with a command from the master station to sequentially monitor and control.

[Problems of Background Art] However, the above-described conventional remote monitoring control device for a pole switch has the following problems. That is, this device is composed of a master station, a plurality of slave stations, and a transmission line connecting these, and since the scope of application of this device is mostly in the city center, the transmission line has a complicated configuration. In many cases. Therefore, the maintenance range of this device includes a master station, a plurality of slave stations, and a transmission line, and the maintenance range is very wide. Also, since the polling method is used, signals on the transmission line are intermittent. It is very difficult to perform such maintenance, and it is a problem in improving reliability.

[Object of the Invention] The present invention has been made to solve the above problems, and an object thereof is to maintain a transmission line connecting a master station and a slave station and the slave station itself by an operation from the master station. It is an object of the present invention to provide a remote monitoring control device for a pole switch that can be extremely easily improved in reliability.

[Summary of the Invention] In order to achieve the above object, according to the present invention, a plurality of slave stations that monitor and control a master station and a pole switch connected by a pair of transmission lines having different downlink signal frequencies and uplink signal frequencies. In a pole-mounted switch remote monitoring and control device, which is configured to include polling and slave stations cyclically in response to a command from the master station to sequentially monitor and control the slave station, A means for transmitting a maintenance request command signal to the slave station via the transmission line, and a frequency and level of a maintenance signal as a test signal transmitted from the slave station via the transmission line in response to the maintenance request command signal. In addition to providing a means for judging, on the condition that the slave station determines that the transmission signal from the master station is the maintenance request command signal,
It is characterized in that a means for continuously transmitting the maintenance signal as the test signal to the master station for a certain period of time via the transmission path is provided.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 is a block diagram showing an example of a schematic configuration of a remote monitoring and controlling apparatus for pole switches according to the present invention. First
In the figure, reference numeral 1 denotes a master station which gives a command signal for performing monitoring and control, and a plurality of pole-mounted switches installed on a system distribution line 5 by a communication line 2 as a transmission line to the master station 1. A plurality of slave stations 3 _{1 to} 3 n are connected to monitor and control 4 _{1 to} 4 n. Here, the communication line 2 constitutes a pair of transmission lines having different downlink signal frequencies and uplink signal frequencies, and the slave stations 3 ₁ to 3 n are cyclically polled and sequentially monitored according to a command from the master station 1. And control.

FIG. 2 is a block diagram showing an example of the functional configuration of the master station 1 and slave stations 3 _{1 to} 3n in FIG.

First, on the master station 1 side, 7 _{1 to} 7 n are slave stations 3 _{1 at the} master station.
Slave station selection switch for selecting ~ 3n, 8 is a slave station 3
A mode selection switch for selecting the mode of the return signal from _{1 to} 3n, and 9 editing transmission data for monitoring and control based on the conditions of the slave station selection switches 7 _{1 to} 7n and the mode selection switch 8, and Child stations 3 _{1 to} 3n described later
The control circuit 10 for determining the data from the control circuit 10 modulates the transmission data from the control circuit 9 at a predetermined frequency, and the MODEM circuit for demodulating the data from the slave stations 3 _{1 to} 3n described later, Reference numeral 11 is a transmission circuit for sending out the data signal modulated by the MODEM circuit 10 to the communication line 2 through the transformer 13, and 12 is data for transmitting data transmitted from the slave stations 3 ₁ to 3 n through the communication line 2. It is a receiving circuit that receives the signal via the device 14 and sends it to the MODEM circuit 10. Reference numeral 30 is a display unit for displaying the state of data transmitted from the slave stations 3 ₁ to 3 n.

On the side of the slave stations 3 _{1 to} 3n, 16 is a receiving circuit for receiving the data transmitted from the parent station 1 via the communication line 2 via the transformer 15, and 17 is the receiving data from the receiving circuit 16. A MODEM circuit for demodulating and modulating later-described data to be transmitted to the master station 1 at a predetermined frequency different from that of the MODEM circuit 10, and 18 is for determining the data signal demodulated by the MODEM circuit 17. A control circuit for controlling the external pole switches 4 _{1 to} 4n through the input / output interface circuit 19 and editing the data of the monitoring state on condition that the data signal concerned is the operation mode of the own station, Reference numeral 21 is a transmission circuit for transmitting the data signal modulated by the MODEM circuit 17 to the communication line 2 via the transformer 22.

In the above, the transformers 13, 14, 15, 22 are
It is provided to match the impedance with the communication line 2.

Further, in this embodiment, the master station 1 and the slave stations 3 _{1 to} 3n are used.
The respective control circuits 9 and 18 are provided with the following respective means for maintenance.

That is, first, in the control circuit 9 of the master station 1, maintenance mode determination means for determining whether or not the maintenance mode is based on the conditions of the slave station selection switches 7 _{1 to} 7n and the mode selection switch 8, and this maintenance mode determination means. The data editing means for editing and transmitting maintenance request command signal data to the slave station based on the judgment conditions in, and the data transmitted from the slave station is transmitted from the slave station selected by the transmission signal of the data editing means. Reception data determining means for determining whether or not the data is the data for receiving, and reception for determining whether or not the transmission of a maintenance signal as a test signal described later transmitted from the slave station in response to the maintenance request command signal data is completed. The end determination means, the reception end determination means determines that the transmission of the maintenance signal has been completed, and the final data described later. Transmission stop means for preventing the transmission of the transmission data for the original monitoring and control to the communication line 2 and the state determination means for determining the frequency and level of the maintenance signal transmitted from the slave station until the reception of Is equipped with.

Further, the control circuit 18 of each of the slave stations 3 _{1 to} 3 n includes the above-mentioned master station 1
Data determining means for determining whether or not the data signal transmitted from the device is in the maintenance mode, timer setting means for setting a timer for a settling time T based on the determination condition of the data determining means, and timer setting by the timer setting means The transmission time for judging whether or not the data editing means for editing the maintenance signal as the test signal and transmitting it to the master station 1 and the timer setting means have timed out (whether or not T time has elapsed from the timer setting) Determination means,
Transmission end data (final data) on condition that the transmission time determination means determines that the time is up
Is provided and the final data output means for editing and transmitting it to the master station 1 is provided.

In such as structure was on pillars closing dexterity remote monitor control device, remote station selection switch ₇₁ for selecting the slave station 3 ₁ 3n First the master station 1 side ～7N, return signals from the slave station 3 ₁ 3n The transmission data for monitoring and control is edited by the control circuit 9 based on the condition of the mode selection switch 8 for selecting the mode. Then, the transmission data edited by the control circuit 9 is modulated by the MODEM circuit 10 at a predetermined frequency, and the data signal modulated by the MODEM circuit 10 is sent to the communication line 2 via the transformer 13.

On the other hand, on the side of the slave stations 3 _{1 to} 3 n, the data signal transmitted from the master station 1 through the communication line 2 is received by the receiving circuit 16 via the transformer 15, and the received data from the receiving circuit 16 is the MODEM circuit. The signal is demodulated in 17 and introduced into the control circuit 18. Then, in the control circuit 18, the MOPE
Performs judgment of the demodulated data signal M circuit 17, the data when the signal is determined as the operation mode of the own station, external pole switch 4 ₁ in question through the output interface circuit 19 4n control and data editing of the monitoring state are performed. Then, the data edited by the control circuit 18 is sent to the master station 1 by the MODEM circuit 17.
The MODEM circuit 10 modulates the data signal at a predetermined frequency different from that of the MODEM circuit 10, and the data signal modulated by the MODEM circuit 17 is sent to the communication line 2 via the converter 21.

Further, on the side of the master station 1, the communication line 2 is connected from the slave stations 3 _{1 to} 3n.
The data signal transmitted (returned) is received by the receiving circuit 12 via the transformer 14, and the received data from the receiving circuit 12 is demodulated by the MODEM circuit 10 and introduced into the control circuit 9. Then, in the control circuit 9, the M
The demodulated data signal is determined by the ODEM circuit 17, and as a result, the state of one slave station selected above is displayed on the display unit 30.

The above operation is cyclically performed between the master station 1 and the slave stations 3 _{1 to} 3n, so that the slave stations 3 _{1 to} 3n are cyclically polled and sequentially monitored by a command from the master station 1. And control is in place.

On the other hand, in such a state, maintenance of the device is performed as follows. That is, first the control circuit 9 of the master station 1, the maintenance mode determining means by said child station selection switch 7 ₁ ～7N, or maintenance mode or not based on the condition of the mode selection switch 8 is determined, in the result maintenance mode When it is determined that there is a maintenance request command signal data for the slave station, it is edited and transmitted to the slave stations 3 _{1 to} 3n side through the communication line 2 through the same route as described above. Then, in the control circuits 18 of the slave stations 3 _{1 to} 3 n,
The data determination means determines whether or not the data signal transmitted from the master station 1 is in the maintenance mode. As a result, when it is determined that the maintenance mode is set, the timer setting means sets the timer for the settling time T. When the timer is set by the timer setting means, the data editing means edits the maintenance signal as a test signal, and the maintenance signal is transmitted to the master station 1 side through the communication line 2 through the same route as described above. The transmission of the edited data is continuously performed until the transmission time determination means determines that the timer setting means has timed up (that T time has elapsed from the timer setting).
When it is determined by the transmission time determination means that the time has expired, the final data output means edits the transmission end data (final data), which is routed via the communication line 2 via the communication line 2 through the same route as described above. Sent to.

Further, in the control circuit 9 of the master station 1, the received data judging means judges whether or not the data transmitted from the slave station is the data from the slave station selected by the transmission signal of the data editing means. For the maintenance request command signal data based on the determination result, until it is determined that the transmission of the maintenance signal as the test signal transmitted from the slave station has been completed and the final data is received,
The transmission stopping means prevents the transmission of the transmission data for the original monitoring and control to the communication line 2. At the same time, the status determining means determines the frequency and level of the maintenance signal transmitted from the slave station, so that the slave stations 3 _{1 to} 3n and the communication line 2 as a transmission line are maintained. .

That is, in this embodiment, when the maintenance request command signal data is transmitted from the master station 1 to the slave stations 3 _{1 to} 3n, a test signal is output during the time T set by the timer setting means of the slave station. Will be continuously transmitted from the child station to the parent station 1 side. Further, in this case, since the master station 1 blocks transmission of the data signal for monitoring and control until it receives the final data transmission from the slave station, only the maintenance signal from the slave station is received. It will be received for T time.

As described above, in the pole switch remote monitoring control apparatus of the present embodiment configuration, the communication line 2 and the slave stations 3 _{1 to} 3n themselves, which are the transmission lines connecting the master station 1 and the slave stations 3 _{1 to} 3n, are connected. Maintenance can be performed extremely easily by a command from the master station 1, and the reliability of the remote monitoring and control device can be improved. This makes the application extremely effective for a system having a complicated transmission line, such as a power distribution system in a city center where the device is often applied.

It should be noted that the present invention is not limited to the above-described embodiments, but can be modified in various ways without departing from the scope of the invention.

[Effects of the Invention] As described above, according to the present invention, means for transmitting to the master station a maintenance request command signal for the slave station to the slave station via the transmission path, and a maintenance request command signal It is provided with means for determining the frequency and level of a maintenance signal as a test signal transmitted from the slave station via the transmission line, and the transmission signal from the master station to the slave station is the maintenance request command signal. Since the maintenance signal as the test signal is continuously transmitted to the master station through the transmission path for a certain period of time, the transmission path connecting the master station and the slave station is provided. Further, it is possible to provide a remote monitoring control device for a pole switch which can maintain the slave station itself by an operation from the master station and can improve reliability.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing the functions of a master station and a slave station in the same embodiment,
3 and 4 are flow charts showing the functions of the respective control circuits of the master station and the slave stations in FIG. 1 ... Parent station, 2 ... communication line, 3 _{1 to} 3n ... Slave station, 4 ₁
〜4n …… Pole switch, 5 …… System distribution line, 7 ₁ ～ 7n
...... Slave station selection switch, 8 …… Mode selection switch, 9
...... Control circuit, 10 …… MODEM circuit, 11 …… Transmission circuit, 12 …… Reception circuit, 13 …… Transformer, 14 …… Transformer, 15 …… Transformer, 16 …… Reception circuit, 17 …… M
ODEM circuit, 18 ... control circuit, 19 ... input / output interface circuit, 21 ... transmission circuit, 22 ... transformer, 30 ... display section.

Claims (1)

[Claims] 1. A control station, which comprises a control station connected by a pair of transmission lines having different downlink signal frequencies and uplink signal frequencies, and a plurality of controlled stations for monitoring and controlling a pole switch. In a remote monitoring and control device for pole switches that polls the controlled stations cyclically in response to a command from the controller and sequentially monitors and controls them, the control station transmits a maintenance request command signal to the controlled stations. And means for transmitting the maintenance request command signal to the controlled station via the path, and means for determining the frequency and level of the maintenance signal as the test signal transmitted from the controlled station via the transmission path. , The controlled station is provided with the condition that the transmission signal from the control station is the maintenance request command signal. Pole closing dexterity remote monitor control device, characterized in that a maintenance signal as bets signals so as to comprise means for transmitting continuously a predetermined time to the control station via the transmission path.