JP2015050806A - Transformation device control panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost transformation device control panel capable of dealing with various specifications of transformation devices.SOLUTION: A transformation device control panel takes a control signal and a power from a host system via wiring to perform control and monitoring of a transformation device, and comprises a control substrate, at least two power supply substrates, an interlock substrate, and a housing. The control substrate can be increased and decreased in unit of substrate, and mounts a transformation device control circuit that satisfies a device configuration and a specification of the transformation device at the lowest limit. The power supply substrates mount a power supply circuit that can supply power to all substrates by one circuit. The interlock substrate mounts an interlock circuit that can modify an interlock condition to the transformation device by connection and disconnection between wiring patterns, depending on the increase and decrease of the transformation device or modification in specification. The housing removably attaches these plurality of substrates so as to be arranged substantially in parallel with each other.

Description

  Embodiments described herein relate generally to a substation control panel that controls a substation.

  In modern societies where electricity is indispensable, the need for a stable supply of electricity is expected to increase further, as is evident from the fact that power outages are often a problem. Moreover, although the substation equipment is used for the power transmission system which supplies electric power, when a failure occurs in the substation equipment, the influence on the electric power supply becomes very large.

  Thus, in order to stably supply power, it is essential to improve the reliability of substation equipment. Furthermore, substation facilities are required to be compact and have a large capacity due to the difficulty in securing land due to an increase in power demand and a rise in land prices.

  Such a substation equipment is generally composed of a plurality of substation devices, a substation control panel that controls and monitors these substation devices, and a host system that acquires and controls information from these devices. Among these, switch devices and transformers can be cited as main devices of substation equipment, but in recent years, gas insulated switchgear (GIS) has been adopted as switchgear. The substation control panel is specifically called an on-site control panel, and is disposed in the vicinity of the substation equipment.

  In addition, the host system takes in the auxiliary switch contact signal indicating the operating position of the substation equipment from the field control panel, gas pressure drop, oil pressure drop signal, CT, PT signal of the gas insulated switchgear (GIS) and It supplies control information, protection relay signals, and power for substation equipment to the control panel, and is generally installed in a substation control room.

Japanese Patent No. 3887438

  Because the specifications of substation equipment vary depending on the power company, the size of the equipment, the installation conditions of the equipment, etc., many types of substation equipment control panels are prepared to meet the specifications of multiple substation equipment. Necessary and costly.

  The problem to be solved by the present invention is to provide a low-cost substation control panel that is compatible with various specifications of substation equipment.

  The substation control panel of the embodiment is connected to a substation and a host system that outputs a control signal of the substation, and takes in the control signal and power from the host system through wiring to control and monitor the substation. It is a substation control panel to perform. A control board, at least two power supply boards, an interlock board, and a housing are provided. The control board can be increased or decreased by the unit of the board, and a substation control circuit that meets the minimum equipment configuration and specifications of the substation is mounted. The power supply board is mounted with a power supply circuit capable of supplying power to all the boards with a single circuit. The interlock substrate is mounted with an interlock circuit capable of changing an interlock condition for the substation equipment by connecting / disconnecting wiring patterns according to increase / decrease of the substation equipment or specification change. The casing is detachably mounted with these substrates arranged in parallel.

It is a block diagram showing the outline composition of the electric power equipment of an embodiment. It is a circuit block diagram mainly using the field control panel of the embodiment. It is an external view of a field control panel. It is a perspective view of a control unit. It is a figure which shows the circuit breaker control circuit of a circuit breaker control board. It is a figure which shows a disconnector / grounding switch control circuit. It is a figure which shows arrangement | positioning of the connector of a disconnector / grounding switch control board. It is a figure which shows the interlock circuit of an interlock board | substrate.

  Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration of a substation facility according to the embodiment, and FIG. 2 is a circuit configuration diagram mainly including an on-site control panel in the substation facility.

  As shown in FIGS. 1 and 2, the substation equipment of this embodiment includes equipment on the substation side such as a circuit breaker 62, a disconnecting switch 63, and a ground switch 64, an on-site control panel 50 as a substation control panel, And a host system including a remote control panel 69 and a protection relay panel 68. The equipment on the substation side is called a gas insulated switchgear (GIS).

  A gas insulated switchgear (GIS) houses high voltage charging parts such as switches and conductors in a grounded metal container together with an insulating medium such as SF6 gas excellent in insulation and arc extinguishing properties. In addition to being able to downsize the installation volume, it has the advantage of being excellent in environmental resistance. Therefore, it is widespread and operating as a device that satisfies the demand for substation equipment reinforcement accompanying an increase in power supply.

  As shown in FIG. 1, the bushing 1 draws in a power transmission line. The bushing 1 is connected to the main bus 5 via the disconnector 2, the circuit breaker 3a, and the main bus disconnector 4a. The main bus 5 is connected to the transformer 6 via a main bus disconnector 4b and a circuit breaker 3b which are facilities on the substation side.

  An electric wire (not shown) is wired as a transmission means between the equipment on the substation side and the field control panel 50. Information such as on / off status information, failure information, operation lock information, and operation command information of the substation equipment is transmitted between the equipment on the substation side and the on-site control panel 50 through electric wires.

(Circuit configuration of on-site control panel 50)
As shown in FIG. 2, a control unit 51, a simulated bus 57, a failure indicator 58, an AC power supply dividing circuit 59, a DC power supply dividing circuit 60, and a hydraulic pump control circuit 61 are arranged on the site control panel 50. A host system such as the protection relay board 68 and the remote control board 69 supplies a control signal including relay information to the field control board 50.

The on-site control panel 50 is connected to the substation equipment and a host system that outputs a control signal for the substation equipment, and takes control signals and power from the host system through wiring to control and monitor the substation equipment. That is, the on-site control panel 50 performs control, monitoring, and on-site display / operation for the equipment on the substation side.
(Device configuration of on-site control panel 50)
As shown in FIG. 3, the on-site control panel 50 includes a housing 43 that houses a simulated bus 44, an operation switch 45, a changeover switch 46, an alarm display unit 47, a relay relay 48, a control unit 51, and the like.

  The on-site control panel 50 is installed mainly for each line of the gas-insulated switchgear, and controls and monitors the gas-insulated switchgear (GIS) and displays / operates the field.

  The field control panel 50 has various switch contacts and relay contacts as a control circuit for operating a gas insulated switchgear (GIS). The control unit 51 is disposed near the front of the site control panel 50.

(Internal configuration of control unit 51)
As shown in FIG. 4, the control unit 51 has a case 86 as a housing. The case 86 has a rectangular cylindrical shape, and in one opening (front opening), a cover 87 that is an openable door that can be opened and closed and a case 86 (control unit 51) are connected to the field control panel. A metal fitting 88 for fixing to the side surface of 50 is provided. The cover 87 protects the front side of the case 86.

  In the case 86, nine control boards, such as a circuit breaker control board 52, an interlock board 54, a contact output board 55, a disconnector / ground switch control board 53, and a power supply board 56, are substantially parallel at a predetermined interval. Are stored in a row. That is, the case 86 is a housing in which a plurality of substrates are arranged in parallel and are detachably attached.

  An internal signal connector 83 is disposed on the front side of the case 86 on each of the substrates 52 to 56, and each connector 83 is connected by a flat cable 70. The external signal connector 84 is disposed on the back side of the case 86, and is configured to perform data communication (interconnect signals) with the outside via electric wires and cables.

  Specifically, among the nine control boards, one circuit breaker control board 52, one interlock board 54, and one contact output board 55, four disconnector / ground switch control boards 53, and a power supply board 56. Two.

  That is, one of the control boards is a circuit breaker control board on which a circuit breaker control circuit for exchanging input / output signals with a circuit breaker included in the transformer device is mounted. At least one of the control boards is a switch / grounding switch control board for exchanging input / output signals for two disconnecting switches and grounding switches included in the transformer.

  At the end of each board, an internal signal connector 83 and an external signal connector 84, which are flat cable connection terminals for transmitting and receiving control signals between the plurality of boards with the flat cable 70, are provided. The external signal connector 84 is provided at each substrate end. The internal signal connector 83 is provided at the substrate end (opening side) opposite to the external signal connector 84 (see FIGS. 3 and 7).

  The internal signal connectors 83 of the plurality of disconnector / ground switch control boards 53 that can be increased or decreased in units of boards are arranged at substantially the same positions at the ends of the boards, so that the boards are shared.

  The disconnector / ground switch control board 53 is a control board on which a substation control circuit that satisfies the equipment configuration and specifications of the substation equipment is mounted, and can be increased or decreased in units of boards. For example, when the number of transformers, the number of disconnectors to be controlled, and the number of ground switches are small, an unnecessary number of substrates out of four may be removed.

  The power supply board 56 is mounted with a power supply circuit capable of supplying power to all the boards with one circuit. Two power supply boards 56 are duplexed (multiplexed) so that the power supply can be switched. In this example, two sheets are used, but three sheets may be used to improve reliability. That is, it is sufficient that there are at least two power supply boards 56. These control boards are obtained by mounting (mounting) control components on a wired printed board.

  Control power supply DC220 / 110V is supplied from the DC power supply dividing circuit 60 to the circuit breaker control board 52, the disconnect switch / ground switch control board 53, and the power supply board 56.

  On the other hand, an auxiliary switch contact is connected to the control boards 52 and 53 by control cables from the circuit breaker 62, the disconnect switch 63, and the ground switch 64, and the circuit breaker 62 and the disconnect switch 63 are connected from the control boards 52 and 53. Then, the input / output command signal is output to the operation mechanism unit of the ground switch 64.

  Further, device operation switches are arranged on the remote control panel 69 and the simulated bus 57. From here, the remote control signal and the direct control signal are input to the control boards 52 and 53, respectively.

  Further, the VT secondary voltage 65 and the open / close state signal 66 of the external transformer are input to the interlock substrate 54 through the control cable.

  An open / close state signal for displaying the device state is output from the contact output board 55 to the simulated bus 57.

  Device failure information 67 is input to the failure indicator 58, and this information 67 is output from the failure indicator 58 to the remote control panel 69.

The electrical system inside the control unit 51 is as follows.
The power supply board 56 is duplicated. The duplicated power supply board 56 is provided with a DC / DC converter circuit (not shown) that converts the DC220 / 110V control power supply from the DC power supply dividing circuit 60 into a DC24V power supply.

  The DC 24V power converted by the power supply board 56 is input to the interlock board 54 via the flat cable 70. From the interlock substrate 54, a DC 24V power supply is distributed and output to the control substrates 52 and 53 via the flat cables 70.

  Next, the auxiliary switch contact signal of each device input to each control board 52, 53 is relayed by a relay in each control board 52, 53, and is interleaved as a DC24V ON / OFF signal indicating the open / close state of the device. The signal is input to the lock substrate 54 via the flat cable 70. In the interlock substrate 54, an interlock signal for each device is created based on these signals, and is output to the control substrates 52 and 53 of each device through the flat cable 70. On the other hand, the open / close state signal 66 collected on the interlock substrate 54 is output to the contact output substrate 55.

  That is, the control unit 51 is not directly connected to the substation equipment and the host system, and is a signal processing circuit (breaker control) in which a power supply voltage (DC24V power supply) lower than the control voltage (DC220 / 110V control power supply) of the substation equipment is set. Circuit, disconnect switch / ground switch control circuit, interlock circuit, etc.) are housed in a casing.

(Configuration of circuit breaker control board 52)
FIG. 5 is a diagram showing a circuit breaker control circuit of the circuit breaker control board 52. In the figure, a portion surrounded by a thick line is a circuit portion in the substrate.

  As shown in FIG. 5, the circuit breaker control board 52 includes a circuit breaker control circuit including a closing circuit, a trip circuit, an auxiliary switch contact signal input circuit, and the like connected through a power supply wiring 71. A control power of DC220V or DC110V is supplied to the power supply wiring 71 and supplied to each circuit.

  The closing circuit includes a closing command input terminal 8, a relay relay 11, an anti-pumping relay 12, and a closing coil 13 as main components.

  In addition, the relay relay contacts 24 and 25 have gas pressure switches that are turned on when the gas pressure in the grounded metal containers (tanks) of the circuit breakers 3a and 3b on the equipment side is lowered, or the hydraulic pressure of the hydraulic operation mechanism of the circuit breaker main body has decreased. Relay the hydraulic switch to turn on.

  These relay relay contacts 24 and 25 have functions such as operation lock of the circuit breakers 3a and 3b and prevention of continuation of a command signal for a predetermined time or more.

  The trip circuit includes a trip command input terminal 14, an operation switch 10, and a relay relay 16 as main components. The relay relay 16 is connected to an external changeover switch 9 and an operation switch 10.

  This tripping circuit is provided with a timer 26 and relay relays 27 and 28. Although outside the substrate, there are a tripping coil 17 and auxiliary switch contacts 20 and 21 as part of the tripping circuit. These auxiliary switch contacts 18 to 23 indicate the operating positions of the circuit breakers 3a and 3b (see FIG. 1) on the equipment side in each circuit.

  The timer 26, relay relays 27 and 28 as trip circuit components mounted on the circuit breaker control board 52, and the relay relay 73 as components of the auxiliary switch contact signal input circuit use DC24V rated products. Has been.

  The DC 24V signal line 72 is connected to the interlock substrate 54 via an internal signal communication connector 83 (hereinafter referred to as “internal signal connector 83”). Other signals are connected to a circuit external to the control unit 51 via an external signal communication connector 84 (hereinafter referred to as “external signal connector 84”).

  The auxiliary switch contact signal input circuit is provided with a relay relay 73 for inputting a contact signal of the auxiliary switch. The relay relay 73 is connected to the auxiliary switch contacts 22 and 23. In this circuit, the state of the auxiliary switch contacts 22 and 23 is input to the DC24V signal line 72 via the relay relay 73.

(Configuration of disconnector / grounding switch control board 53)
FIG. 6 is a diagram showing a disconnector / grounding switch control circuit of the disconnector / grounding switch control board 53. In the figure, a portion surrounded by a thick line is a circuit portion in the substrate 53.

  As shown in FIG. 6, the disconnector / ground switch control circuit 53 includes a closing / trip circuit and a motor circuit.

  The making / tripping circuit is connected from the making command input terminal 29 through the change-over switch 9 and the operation switch 30, and from the tripping command input terminal 32 through the change-over switch 9 and the operation switch 33. The trip control relay 34, the interlock signal relay relay 75, the power relay 77, the relay relay 74, and the relay contact 76 are the main components.

  The motor circuit includes a voltage monitoring relay 38, an interlock signal relay relay 75, a DC 24V signal line 72, and the like as main components, and a relay for controlling turning on / off of the motor 37 installed in the disconnector 2 on the equipment side. It is a circuit for controlling by ON / OFF of.

  The voltage monitoring relay 38 releases the self-holding state of the relay for on / off trip control when the motor power supply is “off”. An interlock condition is set by combining an interlock circuit on the interlock substrate 54 side and an auxiliary switch contact of another transformer.

  Devices installed in the facility-side disconnector 2 include an interlock magnet 39, a shutter switch 40, a limit switch 41, and the like in addition to the motor 37. The interlock magnet 39 constitutes a lock circuit so that the operation handle cannot be inserted when the interlock is not established.

  The shutter switch 40 locks the electric operation circuit when the operation handle is inserted. The limit switch 41 switches its state when the disconnector 2 is completely turned on or off, and releases the self-holding state of the relay for on / off control when the operation of the disconnector 2 is completed.

  On this disconnector / ground switch control board 53, control circuits for two transformer devices (on the right and left sides from the center of this circuit diagram) are mounted, and the two devices can be controlled individually.

  In this disconnector / ground switch control circuit 53, the states of the auxiliary switch contacts 78 and 79 are input to the DC24V signal line 72 via the relay relay 74.

  The power relay 77 is a board mounted type high interruption capability relay. The interlock signal relay relay 75 relays the interlock signal in the DC24V signal line 72, inserts the relay contact 76 in series in the control circuit, and operates the substation equipment only when the interlock signal is ON. I can do it.

  In the same way as the circuit breaker control board 52, this disconnector / ground switch control board 53 uses a DC24V rated product for the internal signal processing control parts, and the internal signal line has a DC24V rating. The DC24V signal line 72 is connected to the interlock substrate 54 via the internal signal connector 83. Other signals are connected to a circuit outside the control unit 51 via the external signal connector 84.

FIG. 7 is a diagram showing an example of component arrangement of the disconnector / grounding switch control board 53.
As shown in FIG. 7, the internal signal connector 83 is on the left side of the board 53 (the door 87 side shown in FIG. 3), and the external signal connector 84 is on the right side of the board 53 as shown. Has been placed. That is, the internal signal connector 83 and the external signal connector 84 are disposed so as to oppose two end portions constituting parallel sides of the substrate.

(Configuration of interlock substrate 54)
FIG. 8 is a diagram showing an interlock circuit of the interlock substrate 54.
As shown in FIG. 8, the interlock substrate 54 is formed with a wiring pattern in which the interlock condition for the substation equipment can be varied. According to this wiring pattern, a plurality of relay relays 80, relay relay contacts 81, short pins 82, an internal signal connector 83, an external signal connector 84, and an external interlock condition contact 85 are mounted on the substrate body.

  The internal signal connector 83 is a flat cable connection connector for performing data communication between substrates. The external signal connector 84 is, for example, a connector for connecting a communication cable for exchanging information (data communication) with an external host system.

  The external interlock condition contact 85 is a switch that is switched according to the number of boards because the number of the switch / ground switch control board 53 and the circuit breaker control board 52 to be mounted changes according to the specifications of the substation equipment. .

  The plurality of relay relays 80 amplify or relay the device open / close state signals input from the control boards such as the disconnect / ground switch control board 53 and the circuit breaker control board 52. When the relay relay 80 amplifies the open / close state signal of the substation equipment, the relay relay 80 operates as an amplifying relay, and the interlock condition for each substation equipment is set by combining the relay contact signals.

  The relay relay 80 has a coil that is excited and a contact that is turned on when the coil is excited. The contact 81 of the relay relay 80 is for setting the specifications of the attached disconnector / ground switch control board 53 and the circuit breaker control board 52.

  The short pin 82 connects and disconnects the separated wiring patterns, and an interlock condition for the substation equipment can be set by connecting and disconnecting the wiring patterns.

  More specifically, the substrate body of the interlock substrate 54 is provided with a plurality of wiring patterns that are separated from each other by branches and lands with through holes for short-circuits provided in the separation portions of these wiring patterns. It has been. That is, the pattern of the substrate main body 54 is designed so as to short-circuit unnecessary contact portions by inserting and soldering the short pins 82 between the separated lands.

  That is, the interlock substrate 54 is mounted with an interlock circuit that can change the interlock condition for the substation equipment by connecting / disconnecting the wiring patterns according to the increase / decrease of the substation equipment or the specification change.

  Functionally, the interlock board 54 distributes the DC 24V power input from the power supply board 56 to each board and outputs the external device open / close state signal 66 input from the control boards 52 and 53 to the contact output board 55. And a function of generating an interlock signal for each device by combining the device open / close state signal and the external interlock condition and outputting the interlock signal to each control board 52, 53.

  An interlock circuit in which an interlock condition for each substation is set by combining the relay relay contact 81 is formed on the substrate body.

  This interlock circuit is configured so that it can be handled by the same circuit for each line type of the substation, and short circuit means for individually short-circuiting unnecessary relay contacts is provided for each line.

  In this embodiment, a part of the interlock circuit is drawn out of the unit 51 so that a VT voltage condition that cannot be created inside the control unit 51, a device switching condition for other lines, and the like can be incorporated into the interlock substrate 54. ing. Further, the interlock substrate 54 corresponds to the basic specifications on the input side (transformer side) and is composed of a DC 24V circuit.

[Action]
Next, operation | movement of the control unit 51 in the electric power installation of this embodiment is demonstrated.
In the case of the control unit 51, the circuit breaker control board 52 and the disconnecting / grounding switch control board 53 take in the states of the auxiliary switches of the circuit breaker 62, the disconnecting switch 63, and the grounding switch 64, and relay them by relays. The signal is input to the DC24V signal line 72 as an open / close state signal of the device.

  In the interlock substrate 54, these open / closed state signals are contact-amplified by the relay relay 80, and these conditions and external interlock conditions are combined to create an interlock signal for each device and output it to the DC24V signal line 72.

  The circuit breaker control board 52 and the disconnect / ground switch control board 53 receive a remote control signal and a direct control signal from the remote control panel 69 and the device operation switches arranged on the simulated bus 57.

  In each of the control boards 52 and 53, only when the interlock signal on the DC24V signal line 72 is ON with respect to these command signals, the operation signals such as the turn-on and trip command signals are supplied to the circuit breaker 62, the disconnector 63, and the ground opening / closing. Is output to the operating mechanism of the device 64.

  On the other hand, the interlock substrate 54 outputs an open / close state signal 66 of each device to the contact output substrate 55, and the contact output substrate 55 insulates the open / close state signal 66 with a relay and outputs it as a no-voltage contact signal to the outside of the unit 51. Output. This contact output is used to display the status of each device.

  According to this embodiment, the control components are arranged on the printed circuit board to configure the control boards 52 to 56, and the control boards 52 to 56 are housed in the same case 86 to control the control unit 51. As a result, the control parts can be mounted at high density, and space efficiency is improved.

  Therefore, compared with the conventional on-site control panel 7 in which the control parts are two-dimensionally arranged on the inner surface and the door, the installation space for the control parts is greatly reduced in the on-site control panel 50 of the first embodiment. And miniaturization can be realized.

  Further, since the number of control component mounting man-hours and wire wiring man-hours can be reduced, the wiring assembly cost can be reduced, and the total cost of the on-site control panel 50 can be reduced. The control component mounted on the printed circuit board has the same reliability as the individual component conventionally used, and the control circuit is basically the same as the conventional circuit, so the reliability is not lowered.

  In addition, since the power supply board 56 is provided in the control unit 51 and the control voltage of the transformer is converted to create the signal processing power supply in the control unit 51, an external power supply dedicated to the control unit is not required.

  Therefore, it is possible to stably supply power that is not affected by voltage fluctuations of the external power supply, and reliability is improved. Further, since the power supply board 56 is duplicated, the control unit 51 can operate without any trouble even if a single failure of the power supply circuit occurs. This further improves reliability.

  In addition, in this embodiment, the power supply voltage of the signal processing control component in the control unit 51 is set to 24 V DC, which is set lower than the device control voltage DC 220/110 V. Therefore, a small and inexpensive printed circuit board control component is provided. The control unit 51 can be reduced in size and cost can be reduced by increasing the density of the substrate pattern.

  In addition, since the failure indicator 58 of the control unit 51 takes in the device failure information 67 and outputs it to the remote control panel 69, it is possible to easily determine the presence or absence of failure from the outside, and to quickly deal with recovery work. It becomes possible.

  Both the circuit breaker control board 52 and the disconnector / ground switch control board 53 are configured as a control board by storing the input / output signal coupling unit with the substation equipment and the control circuit of the substation equipment on one printed board. Therefore, by changing the number of mounted boards 52 and 53, the circuit configuration of the control unit 51 can be easily changed in accordance with the device configuration for each line of the substation.

  Further, in the disconnector / ground switch control board 53, the input / output signal coupling unit and the control circuit for the two disconnectors 63 and the ground switch 64 are mounted on one printed circuit board. Can be miniaturized.

  In this embodiment, since the interlock circuit of the substation controlled by the control unit is composed of the interlock substrate 54 which is a single printed circuit board, the power transmission line, transformer line, bus line, etc. It is possible to create a unified board for each line type.

  Further, a relay relay 80 that amplifies the open / close state signal of the substation equipment is arranged on the interlock substrate 54, and the interlock condition for each substation equipment is configured by combining the contact signals of the relay relay 80.

  For this reason, the number of auxiliary switch contacts used in the field control panel 50 can be greatly reduced. As a result, the number of cores and the number of control cables that connect the substation equipment and the on-site control panel 50 can be reduced.

  Further, as the relay relay contact 81 of the interlock substrate 54, a contact that is turned on when the coil of the relay relay 80 is excited is used. Therefore, if the coil of the relay relay 80 is disconnected or if a failure such as a DC power failure occurs, the interlock condition is not satisfied, and the failure of the control component does not cause the malfunction of the substation equipment. Can be obtained.

  Further, in the interlock substrate 54, the relay relay contacts 81 can be individually short-circuited by the short pins 82. Therefore, a necessary and sufficient number is provided so as to correspond to each line type of the substation, and unnecessary in each line. By short-circuiting the contact of the amplification relay, it is possible to configure an interlock condition for each substation.

  Therefore, it is possible to cope with each line type of the substation by preparing only one type of substrate pattern of the interlock substrate 54, which can contribute to simplification of the configuration.

  Moreover, by easily soldering the short pin 82 and short-circuiting the relay relay contact 81, it is possible to avoid an easy change in circuit conditions. Thereby, the reliability can be improved with an inexpensive configuration.

Further, in the interlock substrate 54, a part of the interlock circuit for each transformer device constituted by the relay relay contact 81 is drawn to the outside of the interlock substrate 54, so that a VT voltage that cannot be created inside the control unit 51 is obtained. Conditions, device open / close conditions of other lines, etc. can be incorporated into the interlock substrate.
(Other embodiments)
The present invention is not limited to the above-described embodiment, and includes other embodiments as exemplified below. For example, in the substation control panel corresponding to the twelfth aspect, the interlock substrate 54 is provided with a changeover switch for short-circuiting the contact of the amplification relay for each contact of the amplification relay.

In the embodiment configured as described above, it is possible to easily cope with the change of the interlock condition by short-circuiting the amplification relay contact by the changeover switch on the interlock substrate 54.
Further, in the embodiment in which the control component mounted on each printed circuit board is a socket mounting type, it is possible to eliminate the need to replace the entire printed circuit board in the event of a failure of the control component. Can be reduced.

  Furthermore, by providing a power supply open / close switch that can be operated from the outside in the power supply circuit portion of each printed circuit board, it is possible to operate the power supply open / close switch to lock the device control for each circuit board and replace the circuit board without interruption.

  According to the embodiment in which a switch, a variable resistance volume, and the like are provided on the front surface of the printed circuit board, it is possible to set the control component, and the control component setting and setting state can be confirmed with the printed circuit board stored in a predetermined position. Therefore, it is possible to improve maintenance and inspection.

  Furthermore, if the printed circuit board housed in the control unit 51 is configured to be pulled out in front of the unit without removing the external wiring, it is possible to check the state of each part of the circuit while the control unit 51 is in operation. Will improve.

  Moreover, it is good also as a structure which provides a data display part in the cover 87 of the front surface of the control unit 51, and performs the opening / closing display of a transformation device, and the failure display of a transformation device and a control circuit. According to such an embodiment, the power unit open / close state display function on the simulated bus 57 and the function of the failure indicator 58 can be provided to the control unit 51 itself, thereby providing a smaller and cheaper substation control panel. it can.

  Furthermore, the substation equipment is not limited to GIS but can be applied to AIS and the like. Further, the control unit internal processing power supply voltage is not limited to the value described in the above embodiment, and the voltage range lower than the substation control voltage is targeted. Furthermore, the circuit of each printed circuit board is not limited to the circuit described in the above embodiment, and can be changed as appropriate.

  As described above, according to this embodiment, the circuit varies depending on the device configuration and specifications of the substation equipment (breaker control circuit and disconnector / ground switch control circuit, etc.) and the device configuration and specifications of the substation equipment. By separating and configuring the circuit (interlock circuit) that does not fluctuate in units of substrates, it is possible to flexibly cope with changes in the device configuration and specifications of the substation equipment.

  That is, by consolidating (concentrating) signals from a circuit that varies depending on the device configuration and customer specifications on the interlock substrate 54, the fixed portion and the varying portion can be separated, and the transformer device has excellent expandability and reliability. A control panel can be provided.

  In addition, a plurality of boards on which control components are mounted are stored together in the same case 86 to constitute the control unit 51, and signals between the boards are sent and received via the flat cable 70, thereby standardizing the control board. be able to.

  That is, it is possible to provide a low-cost substation control panel that can cope with various specifications of substation equipment and can flexibly cope with changes in specifications and configurations of external equipment.

  Although the embodiment for realizing the present invention has been described above, the embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

50 ... Site control panel, 51 ... Control unit, 52 ... Circuit breaker control board, 53 ... Disconnector / ground switch control board, 54 ... Interlock board, 55 ... Contact output board, 56 ... Power supply board, 58 ... Fault display 59 ... AC power supply dividing circuit, 60 ... DC power supply dividing circuit, 69 ... remote control panel, 70 ... flat cable, 71 ... DC220 / 110V control power supply, 72 ... DC24V signal line, 73,74,80 ... relay relay, 75 ... Interlock signal relay relay, 76 ... Interlock signal relay relay contact, 77 ... Power relay, 78, 79 ... Auxiliary switch contact, 81 ... Relay relay contact, 82 ... Short pin, 83 ... Internal signal connector 84 ... External signal connector, 85... External interlock condition contact, 86... Case, 87.

Claims (9)

In a substation control panel that is connected to a substation and a host system that outputs a control signal of the substation, and that controls and monitors the substation by taking in the control signal and power from the host system through wiring,
A control board mounted with a substation control circuit that can be increased or decreased by the unit of the board and that meets the minimum equipment configuration and specifications of the substation equipment, and
At least two power supply boards mounted with a power supply circuit capable of supplying power to all boards with one circuit;
In accordance with the increase or decrease of the substation or the specification change, an interlock board on which an interlock circuit capable of changing an interlock condition for the substation by connecting / disconnecting wiring patterns is mounted,
A substation control panel comprising a housing in which the plurality of substrates are arranged in parallel and detachably attached.   The substation control panel according to claim 1, wherein the at least two power supply boards are multiplexed so that power supply can be switched.   3. The circuit breaker control board according to claim 1, wherein one of the control boards is a circuit breaker control board on which a circuit breaker control circuit for exchanging input / output signals with a circuit breaker included in the transformer is mounted. Substation control panel.   4. At least one of the control boards is a disconnector / grounding switch control board for exchanging input / output signals for two disconnecting switches and grounding switches included in the transformer. Or a substation control panel according to claim 1.   The substation apparatus according to any one of claims 1 to 4, wherein a signal processing circuit that is not directly connected to the substation apparatus and the host system and whose power supply voltage is set lower than a control voltage of the substation apparatus is housed in the casing. control panel.   6. A flat cable connection terminal for transmitting and receiving a control signal with a flat cable is disposed at substantially the same position at an end of each substrate on the plurality of substrates that can be increased or decreased. Substation equipment control panel.   2. The substation control according to claim 1, wherein an amplification relay for amplifying an open / close state signal of the substation is disposed on the interlock substrate, and an interlock condition for each substation is set by combining contact signals of the amplification relay. Board. The amplification relay is
The substation control panel according to claim 7, comprising a coil to be excited and a contact point that is turned on when the coil is excited. The interlock substrate is
The substation control panel according to claim 7, further comprising short-circuit means for individually short-circuiting the contacts of the amplification relay.

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