JP2012110132A - Distribution board and voltage adjustment device unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distribution board with which the number of components can be reduced more than before and a voltage adjustment device unit can be inspected, repaired and added without stopping the entire distribution board.SOLUTION: A distribution board 5 is configured by incorporating, inside one rack 9, a plurality of voltage adjustment device units 1 including a reference data preservation part 22 for preserving various kinds of reference data for control including the reference data for voltage control and a tap switching command generation part for generating a tap switching command for switching a tap of a tap switching three-phase transformer 7 on the basis of the reference data for the voltage control and the output voltage of the tap switching three-phase transformer 7. The voltage adjustment device unit 1 does not include a data setting device for setting the reference data for the control to be preserved in the reference data preservation part 22, and includes a data write part 21 for, when the reference data for the control set on the outside is received, writing the received reference data for the control to the reference data preservation part.

Description

  The present invention relates to a switchboard and a voltage regulator unit for generating a tap switching command for a tap switching transformer in a substation and adjusting a transmission voltage of the tap switching transformer.

  In Japanese Patent Application Laid-Open No. 2007-189821 and the like, in a substation, a transmission voltage adjusting device (distribution panel) that adjusts a transmission voltage by switching a tap of a load-time tap switching transformer having a tap switching device for adjusting a transmission voltage. An example is disclosed. The actual switchboard is based on the reference data storage unit for storing various control reference data including the voltage control reference data, the voltage control reference data, and the output voltage of the tap switch transformer. A plurality of voltage adjusting device units each including a tap switching command generation unit that generates a tap switching command for switching taps are assembled in one rack.

  In a conventional voltage control panel, shared data setting used to set data of all voltage regulator units in one voltage regulator unit among a plurality of voltage regulator units incorporated in one rack. A device is provided.

JP 2007-189821 A

  Providing a shared data setter for a plurality of voltage regulator units contributes to a reduction in the number of parts when viewed as a whole switchboard. However, one voltage regulator unit having a shared data setter is always required for one switchboard, and there is a limit to reducing the number of parts of the switchboard. Another voltage regulator unit that does not include the shared data setter needs to be configured to perform data settling by the shared data setter, which causes a problem of low versatility. Furthermore, in the conventional configuration, it is necessary to stop the entire switchboard when inspecting / repairing one voltage regulator unit or adding a voltage regulator unit. Moreover, since the number of voltage regulator units that can be set by the shared data setter is limited to a predetermined number, the number of voltage regulator units cannot be increased arbitrarily.

  An object of the present invention is to provide a switchboard that can reduce the number of parts as compared with the prior art, and can check, repair, and add a voltage regulator unit without stopping the entire switchboard.

  Another object of the present invention is to provide a highly versatile voltage regulator unit.

  In the switchboard of the present invention, the tap switching transformer is based on a reference data storage unit that stores various control reference data including voltage control reference data, and the voltage control reference data and the output voltage of the tap switching transformer. A plurality of voltage adjusting device units each including a tap switching command generation unit that generates a tap switching command for switching taps of the device are built in one rack. Of course, the voltage regulator unit may include a control circuit other than the reference data storage unit and the tap switching command generation unit, a display unit, and the like. In the present invention, the voltage regulator unit does not include a data setter for setting the control reference data stored in the reference data storage unit, and when receiving the control reference data set externally, A data writing unit for writing the reference data in the reference data storage unit is provided. According to the present invention, the plurality of voltage regulator units are set by the control reference data created by the external data setter. As the external data setter, for example, a device configured as a dedicated device may be used, but a device configured by a personal computer may be used. When viewed as a whole switchboard, according to the present invention, the number of parts can be reduced to the extent that there is no data settling device. In the present invention, the plurality of voltage regulator units are independent of the other voltage regulator units. Therefore, when the voltage regulator unit is inspected and repaired, it is not necessary to stop the voltage regulator unit other than the target voltage regulator unit. Further, the voltage regulator unit can be expanded without stopping the switchboard.

  The data writing unit is preferably configured to receive control reference data from a data setter provided outside via a communication line. In this way, the control reference data can be updated remotely, eliminating the need for an operator to visit the site for data update.

  The voltage regulator unit is preferably constituted by a plurality of divided units individually incorporated in the rack. In this case, various control circuits included in the voltage regulator unit are arranged separately in a plurality of divided units. When the voltage adjusting device unit is constituted by a plurality of divided units, the divided units are transported as a divided unit, and each divided unit may be incorporated in a rack on site, so that transportation and assembly are facilitated. Further, it is preferable that the plurality of divided units are electrically connected using a connector. If a connector is used, assembly work becomes easy.

  The reference data storage unit of the voltage regulator unit may store the voltage control reference data on a daily basis based on the calendar. In this way, it is possible to perform fine voltage control settings that match the circumstances of each installation area.

  The voltage regulator unit may further include an operation information storage unit that stores operation information including the operation state of the tap switching transformer and the supply voltage from the tap switching transformer, and a display unit that displays the operation information. In this way, it becomes possible to easily obtain information necessary for maintenance, inspection, and repair.

It is a figure which shows the whole structure of the distribution substation containing the switchboard of this invention. It is a block diagram which shows the structure of the principal part of an example of embodiment of a voltage regulator apparatus unit. (A) is a front view of a state in which one voltage regulator unit is mounted on one rack, and (B) is a cross-sectional view taken along line BB of FIG. 3 (A).

  Hereinafter, an embodiment of a switchboard according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a distribution substation 3 including a distribution board 5 of the present invention. FIG. 2 is a block diagram illustrating a configuration of a main part of an example of the embodiment of the voltage regulator unit 1. In the example shown in FIG. 1, a distribution board 5 including three voltage regulator units 1 and a plurality of tap-switching three-phase transformers 7 are arranged on the premises of the distribution substation 3. Although not shown in FIG. 2, the voltage regulator unit 1 includes a reference data storage unit for storing various control reference data including voltage control reference data, voltage control reference data, and tap switching. And a tap switching command generator for generating a tap switching command for switching taps of the tap switching three-phase transformer based on the output voltage of the three-phase transformer. Three voltage regulator units 1 are incorporated in one rack 9. One voltage regulator unit 1 outputs a tap switching command to one or more tap switching three-phase transformers 7. In the present embodiment, the three voltage regulator units 1 can independently perform data settling and operate independently.

  The voltage regulator unit 1 of the present embodiment is configured by two divided units 1A and 1B that are individually incorporated in the rack 9. Various control circuits included in the voltage regulator unit 1 are arranged separately in the two divided units 1A and 1B. When the voltage adjusting device unit 1 is constituted by the two divided units 1A and 1B, it is only necessary to convey each divided unit and incorporate it into the rack on the spot for each divided unit, so that conveyance and assembly are facilitated. The upper division unit 1A is mainly provided with a control function, and the lower division unit 1B is provided with an operation panel and a display panel for an administrator or the like to check the situation or directly input a command.

  As shown in FIG. 2, the voltage regulator unit 1 includes a data writing unit 21, a reference data storage unit 22, a tap switching command generation unit 23, an operation information storage unit 24, and the like in the upper divided unit 1A. A control unit 20, a LAN communication I / F circuit 25, a three-phase voltage measurement circuit 26, a timepiece calendar 27, a remote control circuit 28, a communication circuit 29, and the like are provided. The lower divided unit 1B includes an operation panel unit 31, a failure display panel unit 32, an auxiliary relay panel 33, a terminal panel 34, and the like.

  The voltage regulator unit 1 receives the control reference data generated by the data setter 11 at the power station through the LAN line, the hub 13 and the LAN communication I / F circuit 25. The received control reference data is stored in the reference data storage unit 22 via the data writing unit 21 in the control unit 20 together with the date / time information from the clock calendar 27. When the control reference data from the data setter 11 provided outside is stored in the reference data storage unit 22 as in the present embodiment, the data can be updated remotely, and the data update This eliminates the need for workers to visit the site. Further, since the reference data storage unit 22 stores the reference data for voltage control on a daily basis based on the calendar of the clock calendar 27, it is possible to perform fine voltage control settings according to the circumstances of each installation area. .

  The three-phase voltage measuring circuit 26 is a line voltage of three types of UV, VW, and WU, which are line voltages of the U phase, V phase, and W phase on the output side (high voltage side) of the tap switching three-phase transformer 7. Is configured to detect. The three-phase voltage measurement circuit 26 includes an instrument transformer (voltage detector) in order to measure the line voltage. In the three-phase voltage measuring circuit 26, the detected line voltage is converted into a digital signal by the A / D converter, and a detected voltage signal indicating the output state of the tap switching three-phase transformer 7 is generated based on the digital signal. The detected voltage signal is output to the tap switching command generator 23 of the controller 20. More specifically, the three-phase voltage measurement circuit 26 calculates an effective value of each line voltage, calculates an average value based on the effective values of the three types of line voltages, and calculates the average value as A / D It is converted into a digital signal by the conversion unit.

  The tap switching command generation unit 23 in the control unit 20 is preset with the high-voltage side voltage output from the tap switching three-phase transformer 7 based on the detection voltage signal input from the three-phase voltage measurement circuit 26. A tap switching command for controlling to maintain the target voltage is output to the tap switching three-phase transformer 7 via the communication circuit 29. The tap switching command generation unit 23 is generally called a 90 relay, and its operation is well known, and thus detailed description thereof is omitted.

  The operation information storage unit 24 stores operation information including the operation state of the tap switching three-phase transformer 7 and the supply voltage from the tap switching three-phase transformer 7. In the present embodiment, a display unit for displaying the driving information stored in the driving information storage unit 24 is provided, and the driving information stored in the driving information storage unit 24 is transmitted to the LAN communication I / F circuit as required. 25 to the power station (FIG. 1). In this way, it becomes possible to easily obtain information necessary for maintenance, inspection, and repair.

  When receiving the remote control signal including the tap switching command transmitted from the control station 15 shown in FIG. 1, the remote control circuit 28 sends the remote control signal to the tap switching three-phase transformer 7 via the communication circuit 29. Output to. When the remote control circuit 28 is provided, tap switching can be performed remotely from the control station 15.

  The tap-switching three-phase transformer 7 plays a role of reducing the voltage (77 kV, 66 kV, etc.) on the special high voltage side to a voltage for distribution (6.6 kV, etc.) and transmitting the voltage to the distribution line on the high voltage side. The tap switching three-phase transformer 7 has a transformer-side interface 16 and, upon receiving a tap switching command from the tap switching command generating unit 23, transmits an operation command signal to the electric operation mechanism 17, and the tap switching device. 18 is activated to adjust the voltage. The protection device 19 internally performs a failure diagnosis and transmits a failure content to the transformer side interface 16 when there is a minor failure. When there is a minor failure, the transformer side interface 16 outputs a command to operate the electric operation mechanism 17 in a predetermined response mode. When the protection device 19 detects a major failure, the voltage regulator unit 1 receives the determination result and enters a predetermined major failure handling mode.

  As shown in FIG. 2, the operation panel unit 31 in the lower divided unit 1B is used for switching between automatic operation and manual operation, selection of a relay to be used, lamp inspection operation, and the like. The failure display panel unit 32 displays failure information such as a major failure display, a minor failure display, and a power monitoring abnormality display. Further, the auxiliary relay panel 33 is used for selecting an auxiliary relay, and the terminal panel 34 includes a plurality of terminals used for external connection. In the present embodiment, the upper divided unit 1A and the lower divided unit 1B are electrically connected by a connector (not shown). When a connector is used for connection, the mounting operation of the divided units 1A and 1B to the rack 9 is facilitated.

  FIG. 3 (A) shows a front view of a state where one voltage regulator unit 1 is mounted in one rack, and FIG. 3 (B) shows a cross-sectional view taken along line BB of FIG. 3 (A). It is. Depending on the customer's request, as shown in FIG. 3, one voltage regulator unit 1 may be mounted on one rack. In this case, the remaining two voltage regulator units can be added as demand increases.

  In the present embodiment, the voltage regulator unit 1 does not include a data setter for setting the control reference data stored in the reference data storage unit 22, but the control reference set by the external data setter 11. When data is received, a data writing unit 21 is provided for writing the received control reference data to the reference data storage unit. Therefore, even when a plurality of voltage regulator units 1 are mounted on one rack 9, they are independent of each other voltage regulator unit, so that when the voltage regulator unit is inspected and repaired, There is no need to stop the voltage regulator unit 1 other than the voltage regulator unit 1 to be. Further, the voltage regulator unit 1 can be expanded without stopping the switchboard.

  Further, as in the present embodiment, when the voltage adjusting device unit is configured by the two divided units 1A and 1B, the divided unit can be transported as a divided unit, and each divided unit can be incorporated in a rack on site, so that transportation and assembly can be easily performed. Become. The number of division units is arbitrary.

  According to the present invention, since the voltage regulator unit does not include a data setter, the number of parts can be reduced. In addition, since the plurality of voltage regulator units are independent of each other voltage regulator unit, voltage regulator units other than the target voltage regulator unit must be installed when inspecting and repairing the voltage regulator unit. There is an advantage that the voltage regulator unit can be expanded without stopping.

DESCRIPTION OF SYMBOLS 1 Voltage regulator unit 1A Division | segmentation unit 1B Division | segmentation unit 3 Distribution substation 5 Distribution board 7 Tap switching three-phase transformer 9 Rack 11 Data settling device 13 Hub 15 Control station 16 Transformer side interface 17 Electric operation mechanism 18 Tap switching device 19 Protection device 20 Control unit 21 Data writing unit 22 Reference data storage unit 23 Tap switching command generation unit 24 Operation information storage unit 25 LAN communication I / F circuit 26 Three-phase voltage measurement circuit 27 Clock calendar 28 Remote control circuit 29 Communication circuit 31 Operation panel 32 Fault display panel 33 Auxiliary relay panel 34 Terminal panel

Claims (7)

A reference data storage unit that stores various control reference data including voltage control reference data, and switches the taps of the tap switching transformer based on the voltage control reference data and the output voltage of the tap switching transformer. A voltage regulator unit comprising a tap switching command generator for generating a tap switching command is a switchboard that is built in a single rack,
The voltage adjustment unit does not include a data setting device for setting the control reference data stored in the reference data storage unit, and receives the control reference data set externally, and then receives the control A switchboard comprising a data writing unit for writing the reference data for use in the reference data storage unit.   The switchboard according to claim 1, wherein the data writing unit is configured to receive the reference data for control via a communication line from a data setter provided outside. The voltage regulator unit is constituted by a plurality of divided units individually incorporated in the rack,
The switchboard according to claim 1, wherein various control circuits included in the voltage regulator unit are arranged separately in the plurality of divided units.   The switchboard according to claim 3, wherein the plurality of divided units are electrically connected using a connector. A reference data storage unit that stores various control reference data including voltage control reference data, and switches the taps of the tap switching transformer based on the voltage control reference data and the output voltage of the tap switching transformer. A voltage switching device unit for a switchboard comprising a tap switching command generator for generating a tap switching command for
The apparatus does not have a data establishment device for setting the control reference data stored in the reference data storage unit, and receives the control reference data set externally, the received control reference data is converted into the reference data. A voltage regulator unit for a switchboard, comprising a data writing unit for writing to the storage unit.   The switchboard voltage regulator unit according to claim 5, wherein the reference data storage unit stores voltage control reference data in units of one day based on a calendar. An operation information storage unit that stores operation information including an operation state of the tap switching transformer and a supply voltage from the tap switching transformer;
The switchboard voltage regulator unit according to claim 5, further comprising a display unit that displays the operation information.

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