JPH09233736A - Slave station device for distribution line switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise the reliability on monitoring control of a switch by monitoring whether a power stop time measuring part is operating or not in conformity with the command from an operation part, with a monitor, and conveying it to an operation part, and informing a master station of it when this detects the abnormality of the power stop measuring part, and also, outputting abnormality indication. SOLUTION: The slave device 1 for a distribution line switch 2 performs the transfer of information on monitor control with a master station device 13, and performs the control of the switch 2. A power voltage detector 5 detects the existence of the control power voltage taken in through a power transformer 4 from distribution lines 3 at both ends of the switch 2. A control power detector 17 detects that the control power voltage is at a normal voltage value. A power stop time measuring part 10 measures the power stop time of the control power voltage when the distribution line 3 has failed. A monitor 16 monitors the operation of the power stop time measuring part 10. An operation part 15 informs a master station device 13 of it when the monitor 16 detects the abnormality of the power stop time measuring part 10, and also outputs abnormality indication so that it may not control the switch 2 by mistake.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits and receives monitoring control information to and from a master station device, and a switch for dividing and opening and closing distribution lines, and a slave station device for distribution line switches for monitoring and controlling distribution lines. Regarding

[0002]

2. Description of the Related Art For example, when an accident occurs in a power distribution system, when a switch provided in the power distribution system is operated to open and close to investigate where the accident occurred, a power failure occurs in the power distribution system. Opening and closing operations are performed to generate power and then restore power. That is, such an accident investigation function and a remote monitoring control function at the time of power failure recovery of the distribution line are performed by exchanging monitoring control information between the master station device and the slave station device.

FIG. 3 shows a system configuration diagram of a conventional slave station device. The slave station device 1 steps down the voltage from the distribution line 3 connected to both sides of the switch 2 via the power supply transformer 4,
The control power source and the operation power source for turning on the switch 2 are taken in. The voltage level of the taken-in voltage power supply is detected by the power supply voltage detection unit 5.

The AC / DC converter 6 converts the taken-in voltage power supply into a control power supply for operating the electric circuit of the slave station device 1. The control power supply output from the AC / DC converter 6 is detected by the control power supply detector 7 to be normal.

The open / close state of the switch 2 in the switch control unit 9,
Information from the power supply voltage detection unit 5 and the control power supply detection unit 7 is
It is input to the calculation unit 15 via the input unit 8. The switch controller 9 is for controlling the switch 2. Also,
When the power distribution line 3 has a power failure, the power failure time measuring unit 10 measures the power failure time, and when the slave station device 1 is in an abnormal state, the external display unit 11 externally displays the abnormal state.

A request signal for monitoring control and setting of the slave station device 1, the switch 2, and the distribution line 3 from the master station device 13 is performed by the transmission / reception unit 14 via the transmission line 12, and the calculation unit 15 is provided.
Outputs a closing or opening command of the switch 2 to the switch control unit 9 according to a condition from the input unit 8 or a control request from the master station device 13.

Here, when an accident occurs in the distribution system, the power supply to the distribution line 3 is stopped and the power supply voltage to the slave station device 1 disappears.
No ”, the control power supply detection unit 7 transmits the control power“ Yes → No ”to the calculation unit 15 via the input unit 8. Based on this condition, the calculation unit 15 determines that a power failure has occurred, resets the timer value to "0" to the power failure time measurement unit 10, and then issues a command to start the power failure time measurement to start the power failure time measurement.

When the system fault is restored and power is supplied to the distribution line 3, the power to the slave station device 1 is restored. As a result, the voltage detection unit 5 causes the power supply voltage to be “absent → present”,
The control power source detection unit 7 transmits the control power source “absent → present” to the calculation unit 15 via the input unit 8. Under this condition, the calculation unit 15 determines that the power is restored, issues a command to stop the power failure time measurement to the power failure time measurement unit 10, and then reads the power failure time measurement value. Then, from that time, it is determined whether the power failure is an instantaneous power failure or not, and a command for controlling the switch 2 is issued to the switch control unit 9 based on the determination result.

[0009]

However, in such a conventional apparatus, when a power failure occurs, the power failure time measuring section 10 is actually operated only by a one-way command from the computing section 15 to the power failure time measuring section 10. Whether or not the operation is normally performed according to the command is not transmitted to the arithmetic unit 15. Therefore, when the power failure time measuring unit 10 does not operate according to the instruction from the calculation unit 15, it is considered that the power failure time read by the calculation unit 15 from the power failure time measuring unit 10 after power recovery is incorrect. turn into. In other words, the arithmetic unit 15 will determine that the power outage is not so despite the instantaneous power outage, or that it is the instantaneous power outage even though it is not the instantaneous power outage. In such a case, an erroneous command will be issued to the switch control unit 9, the switch 2 will not be controlled normally, and a serious accident may occur on the power distribution system.

Further, as described above, when the power failure occurs, the power supply to the slave station device 1 is stopped, so that the slave station device 1 cannot respond to the monitoring request from the master station device 13. That is, it becomes impossible to notify the master station device 13 of the states of the slave station device 1, the switch 2, and the distribution line 3 immediately before and after the occurrence of the power failure, during the power failure, and immediately before the restoration of the power.

An object of the present invention is to provide a slave station device for raising and lowering a distribution line which is highly reliable in the operation of supervisory control of a switch.

[0012]

According to a first aspect of the present invention, there is provided a distribution line switch for exchanging monitoring control information with a master station device to control a switch provided for dividing and opening / closing a distribution line. It is a slave station device, and the power supply voltage detection unit for detecting the presence or absence of the control power supply voltage taken in from the power distribution line at both ends of the switch via the power supply transformer, and the control power supply voltage is a normal voltage value. A control power supply detection unit for detecting, a power failure time measurement unit for measuring the power failure time of the control power supply voltage when the power distribution line has a power failure, a monitoring unit for monitoring the operation of the power failure time measurement unit, and a monitoring unit When an abnormality is detected in the power failure time measuring unit, the operation unit notifies the master station and outputs an abnormality display.

According to the first aspect of the present invention, the monitoring unit monitors whether the power failure time measuring unit is operating according to the command from the calculation unit, and reports the result to the calculation unit. When an abnormality is detected in the power failure time measuring unit, the parent station device is notified and an abnormality display is output.

A second aspect of the present invention is a slave station device for a distribution line switch, which exchanges monitoring control information with a master station device to control a switch provided for dividing and opening / closing a distribution line. A power supply voltage detection unit that detects the presence or absence of a control power supply voltage that has been taken in via a power supply transformer from the distribution lines at both ends of the switch, and a control power supply that detects that the control power supply voltage has a normal voltage value. A power failure time measurement unit for measuring the power failure time of the control power supply voltage when the power failure occurs in the detection unit and the distribution line, and the master station device and the monitoring control information when the power supply line fails and the supply of the control power supply voltage stops. A battery power supply that supplies control power for transfer, a power switching unit that switches to battery power when the distribution line fails and the supply of control power voltage stops, and a battery monitor that monitors the power capacity of the battery power. And parts, when the battery monitoring section detects the abnormality of the battery power supply is one that an arithmetic unit for abnormal display output and notifies the master station apparatus.

According to the second aspect of the present invention, when a power failure occurs and the power supply to the slave station device is stopped, the power supply switching unit causes the battery power supply to have a power supply capable of responding to the monitoring request from the master station device. Switch. In addition, the battery monitoring unit monitors the amount of battery power supply possessed.

According to a third aspect of the present invention, in the first aspect of the present invention, a control power supply for exchanging supervisory control information with the master station device is supplied when the distribution line fails and the supply of the control power supply voltage is stopped. It has a battery power source, a power source switching unit for switching to the battery power source when the supply of control power voltage stops due to a power outage on the distribution line, and a battery monitoring unit for monitoring the power capacity of the battery power source. When the monitor detects an abnormality in the battery power supply, it notifies the master station device and outputs an abnormality display.

According to the third aspect of the invention, the monitoring section monitors whether the power failure time measuring section receives a command from the computing section to perform normal operation according to the command, and reports the result to the computing section. Also, when a power failure occurs and the power supply to the slave station device is stopped, the power supply switching unit switches to a battery power supply that has sufficient power to respond to the monitoring request from the master station device,
The battery monitoring unit monitors the amount of battery power held,
The result is transmitted to the arithmetic unit. The arithmetic unit notifies and displays the monitoring result to the master station device.

[0018]

Embodiments of the present invention will be described below. FIG. 1 is a block diagram showing the first embodiment of the present invention. The first embodiment is that a monitoring unit 16 that monitors the operation of the power failure time measuring unit 10 is added to the conventional example shown in FIG. 3, and other configurations are the conventional example shown in FIG. Therefore, the same portions are denoted by the same reference numerals and the description thereof will be omitted.

The operation unit 15 resets the timer of the power failure time measurement unit 10 in the same manner as when power failure recovery occurs in the power failure time measurement unit 10 at regular intervals while the slave station device 1 is operating. The inspection command is issued in the order of four steps: timer start, timer stop, and timer value reading. The monitoring unit 16 monitors the operation content of the power failure time measuring unit 10 in response to this inspection command, and notifies the operation unit 15 of the result.

The calculation unit 15 determines whether the power failure time measuring unit 10 is operating normally at each stage based on the information from the monitoring unit 16. That is, when it is determined that the operation is abnormal even in one of the four steps, the command is reissued from the beginning of the four steps to the power failure time measuring unit 10 without waiting for a fixed time, and reconfirmation is performed. In the reconfirmation, if the abnormality does not continue, it is determined that the abnormality of the power failure time measuring unit 10 has been recovered, and the operation is performed at a fixed time to return to the monitoring processing. On the other hand, when the abnormality continues several times, it is determined that the power failure time measuring unit 10 is out of order, and the external display unit 11 indicates that the slave station device 1 is in the abnormal state.
And is transmitted from the transmission / reception unit 14 to the master station device 13 through the transmission line 12.

When an actual power failure occurs and the monitoring section 16 detects an abnormality in the power failure time measuring section 10 while the power failure time measuring section 10 is operating in response to a command from the calculating section 15, when the power is restored, the slave station is restored. The fact that the device 1 is in an abnormal state is displayed on the external display unit 11 and is transmitted from the transmission / reception unit 14 to the master station device 13 through the transmission path 12. Then, the calculation unit 15 does not issue a command to the switch control unit 9 until it determines that the abnormal state of the power failure time measuring unit 10 has returned, and prevents the switch 2 from being erroneously controlled.

According to the first embodiment, since the operation of the power failure time measuring unit 10 is monitored by the monitoring unit 16, the operation unit 15
It is possible to determine whether or not the power failure time measuring unit 10 is operating according to the command, and the erroneous command to the switch control unit 9 is eliminated.

Next, a second embodiment of the present invention will be described. FIG. 2 is a block diagram showing the second embodiment of the present invention. 2 is different from the conventional example shown in FIG. 3 in that the transmission and reception of the monitoring control information with the master station device 13 when the power supply line is cut off and the supply of the control power supply voltage is stopped. A battery power source 17 that supplies a control power source for performing the power supply, a power source switching unit 18 that switches to a battery power source 17 when the distribution line has a power failure and the supply of the control power source voltage stops, and a battery that monitors the power capacity of the battery power source 17. Since the monitoring unit 19 is added and the other configuration is the same as that of FIG. 3, the same portions are denoted by the same reference numerals and the description thereof will be omitted.

When the distribution line 3 has a power failure, the computing unit 15 determines that the power from the distribution line 3 has been cut off due to the condition from the input unit 8. Then, a command to switch to the battery power source 17 is issued to the power source switching unit 18, and the power source of the slave station device 1 is switched to supply from the battery power source 17. The battery power source 17 includes a transmitting / receiving unit 14 and a computing unit 1.
5, so that power can be supplied to the power failure time measuring unit 10 and the external display unit 11 to respond to the monitoring request for the slave station device 1, the switch 2 and the distribution line 3 from the master station device 13 even during a power failure. To

The battery monitoring unit 19 monitors whether or not the power source of the battery power source 17 has enough power to operate the slave station device 1, and if the power source of the battery power source 17 cannot operate the slave station device 1 normally. When judged, the calculation unit 15
Notify that the battery power supply 17 cannot be used. Upon receiving this notification, the calculation unit 15 notifies the master station device 13 through the transmission path 12 from the transmission / reception unit 14 that the power supply for operating the slave station device 1 has run out.

Further, the battery monitoring unit 19 includes the distribution line 3
Is being normally transmitted, the power source holding amount of the battery power source 17 is monitored. Then, when the amount of power held is low, the battery power source 17 is charged with the power from the distribution line 3, and charging is performed until it is determined that the amount of power held by the battery power source 17 has reached the maximum held amount. In addition, if the power source of the battery power source 17 does not reach the power source holding amount that allows the slave station device 1 to operate normally even after charging, it is determined that the battery power source 17 has reached the end of its life or has failed, and the calculation unit 15
Tell Upon receiving this notification, the calculation unit 15 displays on the external display unit 11 that the battery power source 17 is abnormal, and also indicates that the battery power source 17 is abnormal from the transmission / reception unit 14 to the master station device 13 through the transmission path 12. Tell.

According to the second embodiment, the distribution line 3
Even if there is a power failure, the battery power supply 17 supplies power to operate the slave station device 1, and the battery monitoring unit 19 monitors the power capacity of the battery power supply 17, so a monitoring request from the master station device 13 even during a power failure. It is possible to respond to.

In the above description, the battery power source 17, the power source switching unit 18, and the battery monitoring unit 19 are provided in contrast to the conventional example shown in FIG. 3, but the first embodiment shown in FIG. On the other hand, battery power source 17, power source switching unit 1
It goes without saying that the battery monitoring unit 19 may be provided.

[0029]

As described above, according to the present invention,
A highly reliable slave station device for a distribution line switch can be provided. That is, according to the invention of claim 1, since the operation of the power failure time measuring unit can be monitored by the monitoring unit,
Even if an abnormality occurs in the power failure time measurement unit, it is possible to prevent erroneous control of opening and closing of the switch when the power is restored. This improves the reliability of the slave station device.

Further, according to the second aspect of the present invention, even if the distribution line has a power failure, it can be switched to the battery power source by the power source switching unit. It is possible to respond to monitoring requests for equipment and distribution lines.

According to the third aspect of the invention, the operation of the power failure time measuring section can be monitored by the monitoring section, and when the power distribution line fails, the power supply switching section can switch to the battery power source. It is possible to prevent erroneous control of opening and closing of the power supply and to respond to the monitoring request of the slave station device, switch and distribution line from the master station device even during a power failure.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram of a conventional example.

[Explanation of symbols]

 1 Slave Station Device 2 Switch 3 Distribution Line 4 Power Transformer 5 Power Voltage Detector 6 AC / DC Converter 7 Control Power Detector 8 Input 9 Switchgear Control 10 Power Failure Time Measurement 11 External Display 12 Transmission Line 13 parent station device 14 transmitter / receiver unit 15 arithmetic unit 16 monitoring unit 17 battery power supply 18 power supply switching unit 19 battery monitoring unit

Claims (3)

[Claims] 1. A slave station device for a distribution line switch, which transmits and receives monitoring control information to and from a master station device and controls a switch provided for dividing and opening and closing a distribution line. A power supply voltage detection unit for detecting the presence or absence of a control power supply voltage taken from a distribution line via a power supply transformer, and a control power supply detection unit for detecting that the control power supply voltage is a normal voltage value, A power failure time measuring unit for measuring a power failure time of the control power supply voltage when the distribution line has a power failure, a monitoring unit for monitoring the operation of the power failure time measuring unit, and the monitoring unit is the power failure time measuring unit. When the abnormality is detected, the slave station device for the distribution line switch is provided with a calculation unit for notifying the master station and outputting the abnormality display. 2. A slave station device for a distribution line switch, which transmits and receives monitoring control information to and from a master station device and controls a switch provided for dividing and opening and closing the distribution line. A power supply voltage detection unit for detecting the presence or absence of a control power supply voltage taken from a distribution line via a power supply transformer, and a control power supply detection unit for detecting that the control power supply voltage is a normal voltage value, A power failure time measuring unit for measuring a power failure time of the control power supply voltage when the power distribution line has a power failure, and the master station device and monitoring control information when the power distribution line has a power failure and the supply of the control power voltage is stopped. A battery power source for supplying a control power source for transmitting and receiving a power source, a power source switching unit for switching to a battery power source when the power supply line is interrupted and the supply of the control power source voltage stops, and a power source for the battery power source. A battery monitoring unit that monitors the amount,
A slave station apparatus for a distribution line switch, comprising: a computing section for notifying the master station apparatus and outputting an abnormality display when the battery monitoring section detects an abnormality of the battery power supply. 3. A battery power supply for supplying a control power supply for exchanging monitoring control information with the master station device when the power supply line is cut off and the supply of the control power supply voltage is stopped.
A power source switching unit for switching to a battery power source when the power distribution line has a power failure and the supply of the control power source voltage has stopped; and a battery monitoring unit for monitoring the power source capacity of the battery power source, and the arithmetic unit is the The slave station device for a distribution line switch according to claim 1, wherein when the battery monitoring unit detects an abnormality in the battery power supply, the battery monitoring unit notifies the master station device and outputs an abnormality display.