JP2007325437A - Voltage monitoring system for automatic voltage controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voltage monitoring system for an automatic voltage controller which can automatically monitor voltages of a power supply side and a load side of the automatic voltage controller at a low cost. <P>SOLUTION: The voltage monitoring system for the automatic voltage controller has a SVR (step voltage regulator) 1, a remote control switch gear 3, a double power supply transformer 6, and a remote control slave station 5. The system is configured so that a voltage of the power supply side of the SVR 1 can be applied to any one of the double power supply transformer 6 and signals respectively indicating the voltages of the power supply and the load of the SVR 1 can be transmitted to a monitoring station 4 via the remote control slave station 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a voltage monitoring system for an automatic voltage regulator, and is particularly useful when applied to monitor the voltage on the power supply side and load side of an automatic voltage regulator called SVR (Step Voltage Regulator).

  The distribution line causes a voltage drop according to the distance from the power source. For this reason, SVR for automatically compensating for the voltage drop is installed on the distribution line every predetermined distance. This SVR is a step-up transformer having a plurality of taps, and compensates so that the voltage of the distribution line is maintained within a predetermined range by automatically switching the taps according to the voltage to be boosted.

  By the way, in such a distribution line, it may be necessary to investigate the operation status of the SVR in terms of voltage management, such as when the load-side condition is changed. In this case, in the past, a worker went to the site and attached a recording voltmeter to the primary side PT and secondary side PT of the SVR, and the necessary voltage was monitored via this recording voltmeter.

  As a result, the predetermined voltage monitoring operation of the SVR is a troublesome and time-consuming operation. Incidentally, regarding the voltage monitoring work, it is necessary to visit the site twice when installing and removing the recording voltmeter.

  On the other hand, the distribution line is generally provided with a switch, and is opened and closed as necessary during construction of the distribution line. In recent years, there has been proposed a power distribution distance control system in which this switch is configured by a distance control switch and the opening / closing operation is performed by remote control from a distant monitoring station, and one type thereof is a CTC (Common Telecontrol) system. . This is because a remote control station is provided in the vicinity of each remote control switch, and necessary information is exchanged between the remote control station and a remote monitoring station. Necessary control is performed. Here, among the control items in the CTC system, there is a function of detecting the voltage between the input side and the output side of the distance control switch and sending this information to the monitoring station.

  For this reason, in the CTC system, the primary side has both power supply transformers connected to the input side and the output side of the distance control switch, respectively, and the distance control opening / closing via the secondary side of the both power supply transformers. The voltage information on the input side and output side of the device is taken into the remote control station.

  Therefore, if the voltage monitoring function of the remote control switch is used, the voltage on the load side of the SVR can be monitored remotely. However, in this case, it is only possible to monitor the load side voltage of the SVR. That is, similarly, in order to monitor the power supply side voltage of the SVR, the primary side switch needs to be a distance control switch, but this requires a large capital investment cost.

  As this kind of known technique, there is an operation status recording method and a recording apparatus for a high voltage automatic voltage regulator (see Patent Document 1).

Japanese Patent Application Laid-Open No. 08-203756

  In view of the above prior art, the present invention provides an automatic voltage regulator voltage monitoring system capable of automatically monitoring the voltage on the power supply side and load side of the automatic voltage regulator at a low cost. Objective.

The first aspect of the present invention for achieving the above object is as follows:
An automatic voltage regulator that adjusts the voltage so as to compensate for the voltage drop in the distribution line, and a distribution line that is arranged on the load side of the automatic voltage regulator by an open / close command from a remote monitoring station A remote control switch that opens and closes, a dual power transformer that is connected to the input side and the output side of the remote control switch and that respectively sends a signal representing the voltage of the input side and the output side, and the monitoring station In the voltage monitoring system of the automatic voltage regulator, having a remote control station that performs opening / closing control of the distance control switch according to the opening / closing command sent from and sending a signal representing the voltage to the monitoring station,
A voltage on the power supply side of the automatic voltage regulator is applied to one of the power transformers, and the voltage on the power supply side and the load side of the automatic voltage regulator is set via the remote control station. It is the voltage monitoring system of the automatic voltage regulator characterized by sending the signal which represents each to the said monitoring station.

The second aspect of the present invention is:
An automatic voltage regulator that adjusts the voltage so as to compensate for the voltage drop in the distribution line, and a distribution line that is arranged on the load side of the automatic voltage regulator by an open / close command from a remote monitoring station A remote control switch that opens and closes, a dual power transformer that is connected to the input side and the output side of the remote control switch and that respectively sends a signal representing the voltage of the input side and the output side, and the monitoring station In the voltage monitoring system of the automatic voltage regulator, having a remote control station that performs opening / closing control of the distance control switch according to the opening / closing command sent from and sending a signal representing the voltage to the monitoring station,
A first voltage line to which a voltage based on a voltage on a power source side of the voltage regulator is applied, and one voltage line of the both power transformers to which a voltage on the input side of the distance control switch is applied The remote control station selects the first voltage line via the switch means when the remote control station is in a closed state based on a status signal indicating opening / closing of the remote control switch. A signal representing the voltage is selected, and when in the open state, the second voltage line is selected via the switch means, and a signal representing the voltage is sent to the monitoring station. Is a voltage monitoring system of an automatic voltage regulator.

The third aspect of the present invention is:
In the voltage monitoring system of the automatic voltage regulator described in the first to second aspects,
The remote control station is a CTC (Common Telecontrol) type slave station that transmits and receives necessary information using a communication line laid between the remote monitoring station and the monitoring station. This is a voltage monitoring system.

The fourth aspect of the present invention is:
In the automatic voltage regulator voltage monitoring system described in the second aspect,
The automatic voltage regulator voltage monitor characterized in that the selection switching between the first voltage line and the second voltage line uses a signal of an on / off signal line of the distance control switch. System.

According to a fifth aspect of the present invention,
In the automatic voltage regulator voltage monitoring system described in the second aspect,
The voltage monitoring system for an automatic voltage regulator, wherein the first voltage line is connected to a PT that detects a voltage on the power source side of the automatic voltage regulator.

  According to the present invention, the voltage monitoring function related to the remote control switch is used to automatically monitor the voltage on the power supply side and load side of the automatic voltage regulator at a remote monitoring station via the remote control station. Can be done automatically. In other words, it is not necessary to go to the installation site of the automatic voltage regulator one by one, and troublesome work such as installing a recording voltmeter on the primary side and secondary side of the automatic voltage regulator is necessary. The voltage information can be obtained well and easily.

  As a result, it is possible to automatically monitor the voltage between the power supply side and the load side of the automatic voltage regulator at a low cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram showing a voltage monitoring system for an automatic voltage regulator according to the present embodiment. An automatic voltage regulator (hereinafter referred to as “SVR”) 1 is arranged in the middle of the distribution line 2 to compensate for the voltage drop. The remote control switch 3 is connected to the load side of the SVR 1 and is controlled to open and close via the remote control station 5 based on a control signal sent from the remote monitoring station 4.

  In the prior art, voltage information on the primary side and the secondary side of the distance control switch 3 is sent to the monitoring station 4 via the distance control station 5 and is constantly monitored by the monitoring station 4. For this reason, the primary side has both power supply transformers 6 connected to the input side and the output side of the distance control switch 3, and the distance control switch 3 is connected via the secondary side of the both power supply transformers 6. The voltage information on the input side and the output side is taken into the remote control station 5 respectively.

  On the other hand, in the present embodiment, one of the primary sides of the both power transformers 6 (the input side of the distance control switch 3) is connected to the power source side of the SVR1. That is, the primary side of the power supply transformer 6 in this embodiment is connected to the power supply side of the SVR 1 and the output side of the distance control switch 3. Here, the voltage on the output side of the distance control switch 3 represents the voltage on the load side of the SVR 1 when the distance control switch 3 is closed. That is, when the distance control switch 3 is in the closed state, the voltage information on the power source side and the load side of the SVR 1 can be taken into the distance control station 5 via the secondary side of the both power transformers 6 respectively. .

  Thus, voltage information on the power supply side and the load side of the SVR 1 is transmitted to the monitoring station 4 in this embodiment via the remote control station 5.

  FIG. 2 is a block diagram showing details of the remote control station 5. As shown in the figure, the remote control station 5 includes a control unit 5a and a slave station 5b. Here, the control unit 5a has a terminal AB to which a voltage on the power supply side of the SVR1 via the both power transformers 6 is applied between the terminals AB, and a voltage on the load side of the SVR1 via the both power transformers 6 in the same manner. It has a terminal DB to be applied, detects the voltage between both terminals AB and DB, and sends a signal representing them to the monitoring station 4 via the slave station 5b. On the other hand, the slave station section 5b sends the state of the distance control switch 3 to the monitoring station 4 via the pallet wire 9, and sends the control signal sent from the monitoring station 4 to the distance control switch 3 via the control device section 5a. To control the opening / closing of the distance control switch 3.

  As described above, the monitoring station 4 in this embodiment can automatically monitor the voltage information on the power supply side and load side of the SVR 1 transmitted via the remote control station 5. In other words, voltage information necessary for voltage management can be continuously monitored in a remote place without investing in equipment by applying existing technology.

  FIG. 3 is an explanatory diagram showing the voltage at each position of the distribution line, and showing the monitoring mode of the voltage on the power supply side and the load side of the SVR in this embodiment in correspondence with the prior art. In the figure, when the CTC method including the distance control switch 3 is applied to the load side of the SVR 1, only the voltage on the load side of the SVR 1 can be monitored, whereas according to this embodiment, the power source side and the load side of the SVR 1 are monitored. It shows that the voltage can be monitored.

  In FIG. 1, 7 and 8 are manual switches. The manual switch 7 is normally open, and the manual switch 8 is normally closed. Further, for example, a CTC system can be suitably used for the remote control switch 3, the dual power supply transformer 6, the remote control station 5, and the monitoring station 4.

<Second Embodiment>
FIG. 4 is a block diagram showing a voltage monitoring system of the automatic voltage regulator according to the present embodiment. As shown in the figure, the voltage monitoring system of the automatic voltage regulator according to the present embodiment is also applied to the distribution line 2 similar to the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 4, the voltage monitoring adapter 10 is disposed between the two power transformers 6 and the remote control station 5. When the remote control switch 3 is closed, the voltage monitoring adapter 10 is connected to the power supply side of the SVR 1. The voltage information and the voltage information on the output side of the distance control switch 3, and when the distance control switch is in the open state, the voltage information on the input side and the output side of the distance control switch 3 are It is comprised so that it may send out. Here, the voltage information on the power supply side of SVR1 is taken in via the primary side PT of SVR1, and the voltage information on the input side and output side of the distance control switch 3 is taken in via the both power supply transformers 6.

  FIG. 5 is a block diagram showing in detail the voltage monitoring adapter 10 and its vicinity. As shown in the figure, the first voltage line 11 is connected to the primary side PT of the SVR 1 together with the ground line 12 and to the terminal A of the control unit 5 a of the remote control station 5 via the switch 13. is there.

  The second voltage line 14 is connected to the two power transformers 6 together with the ground line 15, and is connected to the terminal A of the control unit 5 a of the remote control station 5 via the switch 13. The third voltage line 16 is connected to the power supply transformer 6 together with the ground line 15, and is directly connected to the terminal D of the control unit 5 a of the remote control station 5. Thus, the voltage information on the input side of the distance switch 3 is supplied to the second voltage line 14, and the voltage information on the output side of the distance switch 3 is supplied to the second voltage line 16, respectively. Yes.

  Therefore, when the switch 13 selects the contact point 13a, a voltage based on the voltage on the power source side of the SVR1 is applied between the terminals AB, and a voltage based on the voltage on the output side of the distance switch 3 is applied between the terminals DB. On the other hand, when the switch 13 selects the contact point 13b, a voltage based on the voltage on the input side of the distance control switch 3 is between the terminals AB, and a voltage based on the voltage on the output side of the distance control switch 3 is between the terminals DB. Each is applied.

  The switch 13 controls the switching according to the presence / absence of conduction between terminals PA and PN or terminals PB and PN provided in the slave station 5b of the remote control station 5. Here, the terminals PA, PN, and PB are connected to a pallet line 9 for transmitting the state of the distance control switch 3 to the monitoring station 4, and when there is conduction between the terminals PA and PN, between PB and PN. When the distance switch 3 is closed and the terminals PB and PN are connected, there is no connection between PA and PN, and the distance switch 3 is open. Therefore, when there is continuity between the terminals PA and PN (when the distance control switch 3 is in the closed state), the switching signal supplied via the control line 17 is controlled so that the contact point 13a is selected. When there is no continuity between the terminals PA and PN (when the distance control switch 3 is in the open state), control is performed so that the contact 13b is selected by a switching signal supplied via the control line 17. It is.

  As described above, in the monitoring station 4 in the present embodiment, while the distance control switch 3 is in the closed state, in other words, the electric potential of the input side and the output side of the distance control switch 3 is the same, and through the SVR 1 While power is being supplied to the load, voltage information on the power supply side and load side of the SVR 1 transmitted via the remote control station 5 can be automatically monitored. That is, voltage information necessary for voltage management can be continuously monitored at a distance.

  On the other hand, when the distance control switch 3 is in the open state, the voltage information on the input side and the load side of the distance control switch 3 transmitted through the distance control station 5 can be automatically monitored.

  The present invention can be used in an industrial field in which power supply or maintenance of a power supply system is performed.

It is a block diagram which shows the voltage monitoring system of the automatic voltage regulator which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the detail of the remote control station in the voltage monitoring system of the automatic voltage regulator of FIG. It is explanatory drawing which shows the monitoring aspect of the voltage in each position of the distribution line which concerns on 1st Embodiment, and the voltage of the voltage by the side of the power supply and load side of SVR in correspondence with the past. It is a block diagram which shows the voltage monitoring system of the automatic voltage regulator which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the detail of the adapter for voltage monitoring in the voltage monitoring system of the automatic voltage regulator of FIG.

Explanation of symbols

1 SVR
2 Distribution line 3 Telecontrol switch 4 Monitoring station 5 Remote control station 6 Dual power transformer 10 Voltage monitoring adapter

Claims (5)

An automatic voltage regulator that adjusts the voltage so as to compensate for the voltage drop in the distribution line, and a distribution line that is arranged on the load side of the automatic voltage regulator by an open / close command from a remote monitoring station A remote control switch that opens and closes, a dual power transformer that is connected to the input side and the output side of the remote control switch and that respectively sends a signal representing the voltage of the input side and the output side, and the monitoring station In the voltage monitoring system of the automatic voltage regulator, having a remote control station that performs opening / closing control of the distance control switch according to the opening / closing command sent from and sending a signal representing the voltage to the monitoring station,
A voltage on the power supply side of the automatic voltage regulator is applied to one of the power transformers, and the voltage on the power supply side and the load side of the automatic voltage regulator is set via the remote control station. A voltage monitoring system for an automatic voltage regulator, characterized in that a signal representing each is sent to the monitoring station. An automatic voltage regulator that adjusts the voltage so as to compensate for the voltage drop in the distribution line, and a distribution line that is arranged on the load side of the automatic voltage regulator by an open / close command from a remote monitoring station A remote control switch that opens and closes, a dual power transformer that is connected to the input side and the output side of the remote control switch and that respectively sends a signal representing the voltage of the input side and the output side, and the monitoring station In the voltage monitoring system of the automatic voltage regulator, having a remote control station that performs opening / closing control of the distance control switch according to the opening / closing command sent from and sending a signal representing the voltage to the monitoring station,
A first voltage line to which a voltage based on a voltage on a power source side of the voltage regulator is applied, and one voltage line of the both power transformers to which a voltage on the input side of the distance control switch is applied The remote control station selects the first voltage line via the switch means when the remote control station is in a closed state based on a status signal indicating opening / closing of the remote control switch. A signal representing the voltage is selected, and when in the open state, the second voltage line is selected via the switch means, and a signal representing the voltage is sent to the monitoring station. Automatic voltage regulator voltage monitoring system. In the automatic voltage regulator voltage monitoring system according to claim 1 or 2,
The remote control station is a CTC (Common Telecontrol) type slave station that transmits and receives necessary information using a communication line laid between the remote monitoring station and the monitoring station. Voltage monitoring system. The automatic voltage regulator voltage monitoring system according to claim 2,
The automatic voltage regulator voltage monitor characterized in that the selection switching between the first voltage line and the second voltage line uses a signal of an on / off signal line of the distance control switch. system. The automatic voltage regulator voltage monitoring system according to claim 2,
The voltage monitoring system for an automatic voltage regulator, wherein the first voltage line is connected to a PT that detects a voltage on the power supply side of the automatic voltage regulator.

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