JPH0686482A - Slave-station control apparatus for distribution-line switch - Google Patents

Abstract

PURPOSE:To enhance reliability in the control and operation of a switch by preventing the returning of a data request in the transient state of the switch and a system voltage into a master station when data request is received by a slave station from the master station during the closing operation of the switch. CONSTITUTION:In a slave station 1, a logic circuit part 10 and a logic timer part are provided. The logic circuit part 10 stores the operating state before the closing operation of a switch 2 during the closing operation of the switch 2, which is becoming the transient state. The logic timer part stores the operating state for a specified time. When the signal of a data request is received from a master station 13 during the period where the logic timer part stores the state, a transition-response detecting part 16 returns the specified pattern, wherein the unbalanced state of the switch and the state of the system voltage does not appear when the logic circuit part 10 is closing, into the master station 13. In this constitution, the unbalanced data are not transmitted with respect to the data request from the master station 13. Thus, the unnecessary abnormality of the switch 2 in the master station 13 and the outputs of the one-side voltage and the like can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substation for a distribution line switch which monitors and controls a switch for dividing and opening and closing the distribution line by an accident investigation function and a remote monitoring control function at the time of power failure and restoration of the distribution system. The present invention relates to a control device (hereinafter referred to as a slave station device).

[0002]

2. Description of the Related Art FIG. 4 shows a system configuration diagram of a conventional slave station apparatus, and the conventional apparatus will be described. The slave station device 1 steps down the voltage via a power transformer 4 from a distribution line 3 connected to both sides of a switch 2 installed on a telephone pole, and supplies a control power supply for turning on the slave station device 1 and the switch 2. Interlocked with the power supply selection unit 5 to be taken in, the distribution system voltage input from this power supply selection unit 5, the auxiliary contact 6 of the switch 2, and the switch body handle for manually and forcibly turning on the switch 2 manually. The input section 8 that takes in the state of the switch body handle interlocking contact 7 that operates in accordance with the above, the logic circuit section 10 that outputs a switch control command to the switch control section 9 according to the condition from the input section 8, and the logic circuit section 10 A switch control unit 9 that actually outputs a switch control command to the switch 2 by the power supply selected by the power supply selection unit 5 in response to the control command.
And a detection circuit 11 for closing that detects whether the control output to the switch 2 is normally output, and the output of the detection circuit for closing is received to monitor whether the switch 2 is normally closed. A transmission unit 15 for transmitting and receiving the status of the slave station apparatus 1 and the status of the switch 2 and the distribution line 3 outside the slave station apparatus 1 via the monitoring unit 12, the master station apparatus 13 and the transmission path 14 installed in the sales office. Composed of and.

When a system failure occurs here, the slave station device 1
Then, if an accident occurs in the distribution line 3, a situation of power failure-recovery occurs, so that the closing operation is performed once to determine the faulty section, but the distribution lines connected to both sides of the switch 2 3, the voltage state via the power transformer 4, and the slave station device 1
And a power source selection unit 5 for taking in the control power source for turning on the switch 2.
State, and the distribution system voltage input from the power source selection unit 5, the auxiliary contact 6 of the switch 2, and the switch body handle for mechanically and manually turning on the switch 2 The state of the input unit 8 that takes in the state of the switch body handle interlocking contact 7 may cause an unbalanced state (the unbalanced state means the voltage on the A side when the switch is turned on (from the switch 3). When there is a data request by the polling transmission method from the master station device 13 which is normally asynchronous at this time, except for the condition where there is a voltage on the power supply side) and a voltage on the D side (voltage on the load side from the switch 2)) The state at the time of data request was transmitted to the master station device 13 as it is without judging the consistency of the states of the switch and the system voltage. Further, FIG. 5 shows a conventional power source selection unit 5 of a slave station. The control power source 20 and the control power source 21 of the slave station 1 are taken in from the distribution line 3 at both ends of the switch 2 via the transformer 4. When the control power supply 21 is applied to the slave station 1, the switching relay 26 is excited, the contacts of the switching relay 26 are made, and the control power supply 21 becomes the power supply 22 for turning on and off the switch 2. Further, when only the control power source 20 is applied to the slave station 1, the switching relay 26 is not excited and the contact of the switching relay 26 remains in a break state, and the control power source 20 serves as the power source 22 for turning on and off the switch 2. When the switch 2 is controlled to be turned on here, the switch controller 9 is operated by the switch controller 9.
By energizing the relay inside and making contacts, the closing power source 22 is applied to the switch 2, and the closing relay inside the switch 2 is excited and the switch 2 is turned on. Conventionally, such switching of the power supply is performed in the slave station.

[0004]

In the case of the conventional device, when the slave station device receives a data request from the master station device by the polling transmission method during the switch closing operation (transition), the switch and Since the state of the system voltage becomes a transient state and this state is transmitted to the master station device, the master station device displays an unfavorable condition for maintenance such as a switch malfunction and one side voltage, causing confusion on the maintenance side. It was In addition, a switching relay 26 that switches the side of the control power supply as described above to the power supply 22.
In the case where contact failure of the contact of the switching relay 26 occurs when the switching relay 26 is switched to the side with the control power supply, the switching power source is turned on even though the switching relay 26 is switched to the side with the control power supply.
There is a disadvantage that the switch 22 cannot be put in even if the switch is turned on and off because there is no 22. When the contact failure of the contacts of these switching relays 26 is instantaneous, only the fact that the slave station 1 becomes refractory (the switch 2 cannot be inserted) remains, and it is difficult to analyze the defective part later. It was The present invention has been made to solve the above problems, and an object of the present invention is to provide a slave station control device having high reliability in control operation of a switch.

[0005]

A slave station control apparatus according to the present invention as defined in claim 1 is a slave station apparatus for monitoring and controlling a switch, which is operated during switch closing operation (at the time of transition). When the slave station receives a data request from the master station by the polling transmission method, the switching operation and system voltage transient state are not returned to the master station. Is for transmitting a specific pattern of data. Further, the slave station control device described in [claim 2] is a power supply voltage detection unit for detecting the presence / absence of a control power supply of the slave station taken in from a distribution line on both sides of the switch via a transformer. And a switching relay for capturing the control power on the side of the control power fetched in the slave station as a power supply for turning on the switch, and detecting the presence / absence of a power supply after switching by the switching relay. And a switching relay control unit that controls the switching relay according to the detection states of the power supply voltage detection unit and the switched voltage detection unit.

According to the first aspect of the present invention, since unbalanced data is not transmitted in response to a data request from the master station device, unnecessary switch abnormality in the master station device, one side Output of voltage etc. can be prevented. Also, [claim 2]
In the device described in (1), when contact failure of the switching relay occurs and the power supply is turned off, it is possible to detect that contact failure of the switching relay has occurred by monitoring the power supply.

[0006]

Embodiments will be described below with reference to the drawings. Figure 1
Is a block diagram of an embodiment of a slave station device according to the invention of claim 1,
FIG. 2 is a flowchart showing the processing content. In FIG. 1, the same parts as those in FIG. A feature of the present invention is that the transient response detecting section 16 is added in the logic circuit section 10, and other configurations are the same as those in FIG. The overall operation between the master station and slave stations is similar to the conventional example. That is, the state of the slave station device 1 is always recognized by the master station device 13 by responding to the data request from the master station device 13 and transmitting it through the transmission path 14. or,
When a failure occurs in the distribution line 3, the slave station device 1 has a function of separating the faulty section at the time of power restoration after the occurrence of a power failure, and therefore performs the closing operation to the switch 2.

FIG. 2 shows the processing contents when the slave station apparatus receives a data request by the polling transmission method from the master station apparatus during the switch closing operation (hereinafter, referred to as transient time).
First, when the slave station device 1 receives a data request by the polling transmission method from the master station device 13 during the switch closing operation (transitional time), the state "1" in operation before the switch closing operation is stored. A logic unit S1 and a logic timer unit S3 for storing the operating state for a certain period of time are provided. When a signal of the data request S2 is received during this period, it is determined whether the switch is operating. A logic unit S4 for performing is provided. Here, if the switch is in the closing operation, the fact that the switch state and the system voltage state are in an unbalanced state (during a transient state) is not returned to the master station device 13. The unbalanced state means that there is an A side voltage (voltage on the power supply side from the switch 2) and a D side voltage (voltage on the load side from the switch 2) when the switch is inserted.
It is a state other than the existence. When the switch closing operation determination logic S4 becomes "0", it is considered that the transient state has ended, and the excitation, main circuit, and main body handle information newly collected by the slave station device 1 are set as a normal state ( Information set 3) S8 and data transmission to the master station device 13 S9. When the switch closing operation determination logic unit S4 is "1", the excitation output from the slave station device 1 is used as a reference so that the switch state and the system voltage state do not become an unbalanced state. If yes, set excitation information from the input data, main circuit entered, A side voltage present, D side voltage present, and information on the main body handle for manually and mechanically turning on the switch 2 (information set 1) Perform S6. Also, excitation output S5
If there is no, there is no excitation from the input data, the main circuit is turned off, A
By setting the side voltage, the D side voltage, and the main body handle information (information set 2) S7, the unbalanced state is not transmitted to the master station device 13. By this, S
The states of S6, S7 and S8 are all data that are not in an unbalanced state, data other than S6, S7 and S8 are not set, and there is no need to perform data transmission S9 of the transient state to the master station device 13.

FIG. 3 is a block diagram of an embodiment of the invention of claim 2. In FIG. 3, the same parts as in FIG. 4 and FIG. In this embodiment, after the switching relay of the switch has switched the control power source to the side with which the control power source is turned on, the defective portion can be detected even when the power source is turned off. In the slave station 1 for controlling on / off of the switch 2 provided on the distribution line 3, the control power source 20 and the control power source 21 are taken in from the distribution line 3 at both ends of the switch 2 via the transformer 4, and the control power source 20 The presence / absence of the control power supply 21 is detected by the power supply voltage detection unit 18. The control power source 20 or the control power source 21 thus taken in is switched by the switching relay 19 and becomes a power source 22 for turning on the switch 2. When the switch 2 is controlled to be turned on, the switch controller 9 excites a relay in the switch controller 9 and makes contacts to make the switch 2.
The switching power source 22 is applied to the switch 17, and the relay 17 of the switch 2 is excited to turn on the switch 2. Power supply 22 after switching the switching relay 19
The presence / absence of “No” is detected by the switched voltage detector 23, and the detection results of the power supply voltage detector 18 and the switched voltage detector 23 are calculated by the arithmetic processing unit 24.
Sent to. The arithmetic processing unit 24 first instructs the switching relay control unit 25 to switch the switching relay 19 to the control power supply side that the power supply voltage detection unit 18 has detected, and the switching relay control unit 25 receiving this command causes the switching relay control unit 25 to switch. Drive. Switching relay 19
If the post-switching voltage detection unit 23 detects that the switch relay 19 has been switched, the arithmetic processing unit 24 determines that the switching of the switching relay 19 has succeeded and maintains the state. On the other hand, when the switching relay 19 is switched, if the input power supply 22 is in a non-state due to contact failure of the contacts of the switching relay 19 and the post-switching voltage detection unit 23 does not detect, the arithmetic processing unit 24 that has received the information It is judged that the contact failure of the switching contact has occurred in the switching relay 19, and in order to recover the contact failure of the contact, the contact of the switching relay 19 is repeatedly made through the switching relay control unit 25 until it is detected by the voltage detection unit 23 after switching.
Break. Further, even if the switching contact is made and broken for a certain period of time, if no power is supplied, a defect is displayed. According to the above-described embodiment, the switching relay 19 can be controlled by monitoring the presence / absence of the power supply 22 after switching the switching relay 19, and the power supply 22 can be surely kept in the enabled state. it can.

[0009]

As described above, according to the invention described in [Claim 1] according to the present invention, in the case of a transitional state during the closing operation of the switch, the switching operation is performed in response to the data request from the master station device. Since it is possible to prevent the transmission of unbalanced data of the device information and the state of the system voltage, it is possible to prevent the output of an unnecessary switch abnormality, one side voltage, etc. in the master station device.
The reliability of the slave station device is improved. Further, according to the invention described in [Claim 2], the contact portion of the switching relay can be monitored by monitoring the input power source after the switching of the switching relay, and the contact failure of the contact of the switching relay occurs. A highly reliable child that can recover from a contact failure and can reliably control the switch in operation of the power distribution system by making sure that the power supply required to turn on and control the switch is in the ON state. A station can be provided.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a slave station device according to the present invention.

FIG. 2 is a flow chart of an embodiment constructed according to the present invention.

FIG. 3 is a system configuration diagram of a slave station device according to another embodiment.

FIG. 4 is a system configuration diagram of a conventional device.

FIG. 5 is a system configuration diagram of a power source selection unit of a conventional device.

[Explanation of symbols]

 1 Slave station device 2 Switch 3 Power distribution line 4 Power transformer 5 Power source selection unit 6 Switch auxiliary contact 7 Switch body handle interlocking contact 8 Input unit 9 Switch control unit 10 Logic circuit unit 11 Input detection circuit 12 Monitoring unit 13 Master station device 14 Transmission line 15 Transmission unit 16 Transient response detection unit 17, 19 Relay 18 Power supply voltage detection unit 23 Switched voltage detection unit 24 Calculation processing unit 25 Switching relay control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Miyaura, 1st Toshiba Town, Fuchu-shi, Tokyo Inside Toshiba Fuchu factory (72) Inventor Kazutoyo Narita 1st, Toshiba Town Fuchu-shi, Tokyo Inside Fuchu factory, Toshiba

Claims (2)

[Claims] 1. In a slave station control device for a distribution line switch, which controls a distribution line section switch provided for dividing and opening / closing a distribution line, a switch closing operation during a switch closing operation during a transient time. A logic circuit unit that stores the operating state before, a logic timer unit that stores the operating state for a certain period of time, and a data request signal from the master station device while the logic timer unit stores the signal. When it is received, if the logic circuit unit is in the closing operation, a transient response detection unit that returns a specific pattern that does not result in an unbalanced state of the switch state and the system voltage state to the master station device, Slave station control device for distribution line switch. 2. A slave station control device for a distribution line switch, which controls on / off of a switch provided on a distribution line, wherein the slave station control device is taken in from a distribution line at both ends of the switch via a transformer. A power supply voltage detection unit for detecting the presence / absence of a control power supply, and a switching relay that operates a switching contact that takes in the control power supply with the control power supply taken into the slave station control device as a switch-on power supply, A post-switching voltage detection unit for detecting the presence / absence of input power after being switched by the switching relay, and a switching relay control unit controlling the switching relay according to the detection states of the power supply voltage detection unit and the post-switching voltage detection unit. A slave station control device for a distribution line switch, comprising: