WO2014141727A1 - Distribution board for protection control, and protection control system for electric power station - Google Patents

Distribution board for protection control, and protection control system for electric power station Download PDF

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Publication number
WO2014141727A1
WO2014141727A1 PCT/JP2014/050185 JP2014050185W WO2014141727A1 WO 2014141727 A1 WO2014141727 A1 WO 2014141727A1 JP 2014050185 W JP2014050185 W JP 2014050185W WO 2014141727 A1 WO2014141727 A1 WO 2014141727A1
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WO
WIPO (PCT)
Prior art keywords
power supply
distribution board
devices
control
abnormality detection
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Application number
PCT/JP2014/050185
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French (fr)
Japanese (ja)
Inventor
健吾 宮城
慎司 松田
実 奥田
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株式会社 東芝
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Publication of WO2014141727A1 publication Critical patent/WO2014141727A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks

Definitions

  • Embodiments of the present invention relate to a distribution board for protecting and controlling an electric station such as a power plant, a substation, and a switching station, and an electric station protection control system using the distribution board.
  • Fig. 11 shows an outline of a conventional electric station protection control system.
  • the electric station protection control system 150 includes a DC distribution board 110 and a plurality of devices A4 to D4 connected to the DC distribution board 110.
  • the control power supply 6 provided on the input side of the DC distribution board 110 is divided into four by the MCCB1 switch 111 of the DC distribution board 110, and is supplied via the MCCB2 switch 112a, MCCB3 switch 112b, MCCB4 switch 112c, and MCCB5 switch 112d. It is supplied to each of the devices A4, B4, C4, and D4 as the supply destination. Since the devices A4 to D4 have the same configuration, the devices A4 and B4 will be described below.
  • the control power source is stepped down by the DC / DC power source device 113a, and the stepped down power source is supplied to the control unit 114a.
  • the control unit 114a is equipped with a power supply abnormality detection unit 115a. When a power supply abnormality is detected by voltage level monitoring, the control unit 114a latches the power supply abnormality detection latch circuit 116a and issues a transition to the control mode lock 117a and an alarm 118a. To do.
  • the power supply voltage step-down by the DC / DC power supply device 113b is monitored by the power supply abnormality detection unit 115b of the control unit 114b, and when a power supply abnormality is detected, the power supply abnormality detection latch circuit Latch at 116b and issue a transition to control mode lock 117b and alarm 118b.
  • FIG. 12 shows a configuration of an electric station protection control system in which the electric station protection control system 150 having a single circuit configuration is formed as a multiple circuit.
  • the control power supply for the device is divided into two by the MCCB1 switch 121 in the DC distribution board 120 and supplied to the devices A5 and B5 as power supply destinations through the MCCB2 switch 122a, while MCCB3
  • the configuration is the same as that of the electric station protection control system 150 except that power is supplied to the devices C5 and D5 that are power supply destinations via the switch 122b.
  • the power supply abnormality detection of the control units 114a and 114b is detected at the time of turning on the power after the control power supply 6 is cut off at the DC distribution board 110 or at the time of power recovery after an unexpected voltage drop. Due to individual errors such as the power supply abnormality detection voltage in the units 115a and 115b, inconsistencies in operation may occur in each device regarding the presence or absence of the transition to the control mode locks 117a and 117b and the presence or absence of the alarms 118a and 118b. Further, for the same reason, in the electric station protection control system 160, the operation may be inconsistent among the devices. This inconsistency in operation will be specifically described below.
  • FIG. 13 is a time chart relating to the power supply abnormal operation of the conventional electric station protection control system 150. This figure shows the difference in operation at the time of power recovery when the power supply abnormality detection voltages of the devices A4 and B4 are different.
  • the power supply abnormality detection unit 115a operates at the time T1, and when the control power supply operable voltage V3 of the device B4 becomes equal to or higher than the power supply at the time T2.
  • the abnormality detection unit 115b operates immediately.
  • the power supply abnormality detection latch circuit operating voltage V5 since the power supply abnormality detection latch circuit operating voltage V5 has not yet been reached, the power supply abnormality detection latch circuits 116a and 116b do not operate.
  • the power supply abnormality detection latch circuit 116b operates and the control mode lock 117b and the alarm 118b are triggered. Is done. At this time, the control mode lock 117b and the alarm 118b of the device B4 are unnecessary operations, and it is necessary to confirm correctness during operation.
  • An object of the present invention is to reduce the correctness / incorrectness confirmation work due to the inconsistent operation of each device at the time of collective turning on after the control power supply is cut off in the DC distribution board and at the time of power recovery after an unexpected voltage drop.
  • An embodiment of the present invention is a protective control distribution board that performs power supply division of a control power supply and supplies power to a plurality of devices, the power supply device receiving power supply from an uninterruptible power supply, and An undervoltage relay that is driven by a power supply device and closes a contact when the control power source is lower than a set voltage, and a suppression means that suppresses the operation of the circuits in the plurality of devices by exciting a coil when the contact is closed. And.
  • Another embodiment of the present invention includes a protection control distribution board that divides a control power supply and supplies power to a plurality of apparatuses, and a plurality of apparatuses connected to the distribution board.
  • An electrical station protection control system wherein the protection control distribution board is driven by a power supply device that is supplied with power from an uninterruptible power supply, and the contact is closed when the control power supply falls below a set voltage.
  • An undervoltage relay, and a suppression unit that suppresses the operation of the circuits in the plurality of devices by exciting the coil when the contact is closed, and the device includes a DC power supply device that steps down the control power supply;
  • a power supply abnormality detection unit that detects a power supply abnormality of the control power supply, a power supply abnormality detection latch circuit that latches when a power supply abnormality is detected by the power supply abnormality detection unit, the power supply abnormality detection unit, and the power supply
  • With connecting atmospheric detection latch circuit opens and the coil in the suppressing means is energized, characterized in that it comprises an auxiliary relay having a normally closed contact for locking the power supply abnormality detection latch circuit.
  • the electric station protection control system 20 includes the DC distribution board 10 shown in FIG. 1 and the four devices A1 to D1 shown in FIG.
  • a DC distribution board 10 shown in FIG. 1 includes an AC / DC power supply device 13 that receives power from an AC uninterruptible power supply 2, an undervoltage relay 14 that closes when the voltage falls below a set voltage, and a coil that closes when the contact closes. Is composed of an auxiliary relay 80X15 that is excited. Further, the control power supply 1 is branched from the DC distribution board 10 by the number of devices, and is connected to the devices A1 to D1 shown in FIG. The operating voltage of the undervoltage relay 14 can be arbitrarily set.
  • a device A1 shown in FIG. 2 includes a DC / DC power supply device 21a that steps down the control power supply, a control unit 22a that controls each unit, a power supply abnormality detection latch circuit 25a that latches when a power supply abnormality is detected, and a control unit 22a and an auxiliary relay 80X for connecting the power supply abnormality detection latch circuit 25a.
  • the auxiliary relay 80X has a normally closed contact 24a that opens when the coil is excited and locks the power supply abnormality detection latch circuit 25a.
  • the control unit 22a is equipped with a power supply abnormality detection unit 23a.
  • the device B1, the device C1, and the device D1 are mounted on the DC / DC power supply devices 21b, 21c, and 21d, the control units 22b, 22c, and 22d, and the control units 22b, 22c, and 22d, respectively.
  • Power supply abnormality detection units 23b, 23c, and 23d, auxiliary relays 80X having normally closed contacts 24b, 24c, and 24d, and power supply abnormality detection latch circuits 25b, 25c, and 25d are provided.
  • the AC / DC power supply device 13 converts the power from the AC uninterruptible power supply 2 from AC to DC, and uses it as a power supply for a DC undervoltage detection circuit.
  • the undervoltage relay 14 takes in the control power supply 1 from the power supply side of the MCCB2 switch 12a and performs voltage level monitoring. When the voltage of the control power supply 1 becomes lower than the set voltage of the undervoltage relay 14, the internal contact is closed. In the auxiliary relay 80X15, the coil is excited when the contact is closed.
  • FIG. 3 is a time chart relating to the power supply abnormal operation of the electric station protection control system 20 according to the first embodiment. This figure shows the difference in operation at the time of power recovery when the power failure detection voltages of the device A1 and the device B1 are different. That is, the operation of the devices A1 and B1 when the control power supply 1 is collectively turned on to the devices A1 to D1 by the MCCB1 switch 11 is shown.
  • the power supply abnormality detection unit 23a operates at the time T1, and further becomes equal to or higher than the control unit operable voltage V3 of the device B1. At time T2, the power supply abnormality detection unit 23b operates immediately. However, since the operating voltage V5 of the power supply abnormality detection latch circuit has not yet been reached, the power supply abnormality detection latch circuits 25a and 25b do not operate.
  • the internal contact of the undervoltage relay 14 is closed and the normally closed contact 24b of the auxiliary relay 80X is open (time A), so the power supply abnormality detection latch circuit 25b does not operate (B portion). For this reason, the control mode lock and the alarm are not erroneously issued.
  • the voltage of the control power supply 1 of the devices A1 to D1 is centrally monitored by the undervoltage relay 14 of the DC distribution board 10, and the power supply of the devices A1 to D1 is below an arbitrarily set voltage. Since the abnormality detection latch circuits 25a, 25b, 25c, and 25d can be locked simultaneously, the power supply recovery after the control power supply 1 is turned on collectively to the devices A1 to D1 by the MCCB1 switch 11 of the DC distribution board 10 or after an unexpected voltage drop. The device operation can be unified during power transmission, and correctness check work is not required.
  • the electric station protection control system 40 includes a DC distribution board 30 shown in FIG. 4 and four conventional devices A4 to D4 shown in FIG.
  • the DC distribution board 30 shown in FIG. 4 includes an AC / DC power supply device 33 that receives power from the AC uninterruptible power supply 2, an undervoltage relay 34 that closes when the voltage falls below a set voltage, and a coil that closes when the contact is closed.
  • the normally closed Y contact 36 of the electromagnetic contactor Y (35) opens when the coil is excited, and cuts off the power supply to the devices A4 to D4.
  • the control power supply 1 is branched from the DC distribution board 30 by the number of devices and connected to the devices A4 to D4 shown in FIG.
  • the operating voltage of the undervoltage relay 34 can be arbitrarily set.
  • the AC / DC power supply device 33 converts the power from the AC uninterruptible power supply 2 from AC to DC, and uses it as the power supply for the DC undervoltage detection circuit.
  • the undervoltage relay 34 takes in the control power supply 1 from the power supply side of the power supply division MCCB2 switch 32a and performs voltage level monitoring. When the voltage of the control power supply 1 becomes lower than the set voltage of the undervoltage relay 34, the internal contact is closed. In the electromagnetic contactor Y (35), the coil is excited when the contact is closed.
  • FIG. 5 is a time chart relating to the power supply abnormal operation of the electric station protection control system according to the second embodiment. This figure shows the difference in operation at the time of power recovery when the power supply abnormality detection voltages of the devices A4 and B4 are different. That is, the operation of the devices A4 and B4 when the devices A4 to D4 are collectively turned on by the MCCB1 switch 31 is shown.
  • the control power supply voltage (device side) is 0 V until the operating voltage V8 of the DC distribution board is reached (that is, until T6), and the power supply abnormality detection latch circuit 116b does not operate (D portion). For this reason, the control mode lock and the alarm are not erroneously issued.
  • the control power supply voltage of the devices A4 to D4 is centrally monitored by the undervoltage relay 34 of the DC distribution board 30, and when the voltage is lower than an arbitrary set voltage, the devices A4 to D4 are connected to the devices A4 to D4.
  • the voltage level is set to 0 V in the voltage range where the device operation becomes ununiform, and the operation of the power supply abnormality detection latch circuits 116a, 116b, 116c, 116d of the power supply destination device can be suppressed.
  • the control power supply 1 is turned on collectively by the MCCB1 switch 31 of the DC distribution board 30 or when the power supply is restored after an unexpected voltage drop, the operation of the apparatus can be unified, and correctness check work becomes unnecessary.
  • the electric station protection control system 60 includes a DC distribution board 50 shown in FIG. 6 and four devices A2 to D2 shown in FIG.
  • the DC distribution board 50 includes a distribution board circuit 50a for the devices A2 and B2, and a distribution board circuit 50b for the devices C2 and D2.
  • the distribution board circuit 50a includes an AC / DC power supply 53 that receives power from the AC uninterruptible power supply 4, an undervoltage relay 54a that closes a contact when the voltage falls below a set voltage, and an auxiliary that energizes a coil when the contact closes.
  • the relay 80X1 55a and the auxiliary contact 56a that is closed when the MCCB2 switch 52a is turned on are provided.
  • the distribution board circuit 50b is branched and connected from the AC / DC power supply device 53 of the distribution board circuit 50a, and the undervoltage relay 54b that closes the contact when the voltage is lower than the set voltage, and the coil is excited when the contact is closed. And an auxiliary contact 56b that is closed when the MCCB3 switch 52b is turned on between the undervoltage relay 54b and the auxiliary relay 80X2 55b.
  • the distribution board circuit 50b includes a contact 57a of the auxiliary relay 80X1 55a for contact amplification that receives the contact output of the undervoltage relay 54a provided for the load side voltage of the MCCB2 switch 52a, and a load of the MCCB3 switch 52b.
  • the contact relay amplifying relay 80X2 receiving the contact output of the undervoltage relay 54b provided for the side voltage is set to an OR condition with the contact 57b of the contact 55b, and the auxiliary relay 80X3 in which the coil is excited when any of these contacts is closed. 55c is provided.
  • the devices A2 and B2 are connected to the load side of the MCCB2 switch 52a for power supply division, while the devices C2 and D2 are connected to the load side of the MCCB3 switch 52b. .
  • the apparatus A2 shown in FIG. 7 includes a DC / DC power supply apparatus 63a that steps down the control power supply, a control unit 64a that controls each part, a power supply abnormality detection latch circuit 67a that latches when a power supply abnormality is detected, and a control unit 64a and an auxiliary relay 80X3 connecting the power supply abnormality detection latch circuit 67a.
  • the auxiliary relay 80X3 has a normally closed contact 66a that opens when the coil is excited and locks the power supply abnormality detection latch circuit 67a.
  • the control unit 64a is equipped with a power supply abnormality detection unit 65a.
  • the devices B2, C2, and D2 are mounted on the DC / DC power supply devices 63b, 63c, and 63d, the control units 64b, 64c, and 64d, and the control units 64b, 64c, and 64d, respectively.
  • Power supply abnormality detection units 65b, 65c, 65d, auxiliary relays 80X having normally closed contacts 66b, 66c, 66d, and power supply abnormality detection latch circuits 67b, 67c, 67d are provided.
  • the control power supply 3 is divided by the MCCB2 switch 52a and the MCCB3 switch 52b via the MCCB1 switch 51.
  • the MCCB2 switch 52a collectively opens and closes the control power supply 3 for the devices A2 and B2.
  • the MCCB3 switch 52b collectively opens and closes the control power supply 3 for the devices C2 to D2.
  • the AC / DC power supply device 53 converts the power from the AC uninterruptible power supply 4 from AC to DC to be a DC undervoltage detection circuit power source, and the undervoltage relay 54a is an MCCB2 switch 52a.
  • the control power supply 3 is taken in from the load side and voltage level monitoring is performed.
  • the internal contact is closed.
  • the auxiliary relay 80X1 55a is excited when the internal contact of the undervoltage relay 54a is closed and the MCCB2 auxiliary contact 56a is closed when the MCCB2 switch 52a is turned on.
  • the auxiliary relay 80X2 55b is energized when the internal contact of the undervoltage relay 54b is closed and the MCCB3 auxiliary contact 56b is closed when the MCCB3 switch 52b is turned on.
  • the coil of the auxiliary relay 80X3 55c is excited under the OR condition of the 80X1 contact 57a and the 80X2 contact 57b.
  • the normally closed contact 66a of the auxiliary relay 80X3 in the device A2 opens when the above-described auxiliary relay 80X3 55c coil is excited and locks the power supply abnormality detection latch circuit 67a. For this reason, the power supply abnormality detection latch circuit 67a does not operate, and the control mode lock and the alarm are not erroneously issued.
  • the normally closed contacts 66b, 66c, 66d of the auxiliary relay 80X3 are opened when the above-described 80X3 55c coil is excited, and lock the power supply abnormality detection latch circuits 67b, 67c, 67d, respectively. For this reason, the power supply abnormality detection latch circuits 67b, 67c, 67d do not operate, and the control mode lock and the alarm are not erroneously issued.
  • the electric station protection control system 80 includes a DC distribution board 70 shown in FIG. 8 and four devices A5 to D5 shown in FIG.
  • the DC distribution board 70 includes a distribution board circuit 70a for the devices A5 and B5 and a distribution board circuit 70b for the devices C5 and D5.
  • the distribution board circuit 70a includes an AC / DC power supply device 73 that receives power from the AC uninterruptible power supply 4, an undervoltage relay 74a that closes when the voltage falls below a set voltage, and an electromagnetic that excites a coil when the contact closes. It comprises a contactor Y1 75a and a normally closed Y1 contact 76a of the electromagnetic contactor Y1 75a. The normally closed Y1 contact 76a of the electromagnetic contactor Y1 75a opens when the coil is excited, and interrupts the power supply to the devices A5 and B5.
  • the distribution board circuit 70b is branched and connected from the AC / DC power supply device 73 of the distribution board circuit 70a, and the undervoltage relay 74b that closes the contact when the voltage is lower than the set voltage, and the coil is excited when the contact is closed.
  • the electromagnetic contactor Y2 75b and the normally closed Y2 contact 76b of the electromagnetic contactor Y2 75b are configured.
  • the normally closed Y2 contact 76b of the electromagnetic contactor Y2 75b opens when the coil is excited, and interrupts the power supply to the devices C5 and D5.
  • the devices A5 and B5 are connected to the load side of the MCCB2 switch 72a for power supply division, while the devices C5 and D5 are connected to the load side of the MCCB3 switch 72b.
  • the operating voltage of the undervoltage relays 74a and 74b can be set arbitrarily.
  • the control power supply 3 is divided by the MCCB2 switch 72a and the MCCB3 switch 72b via the MCCB1 switch 71.
  • the MCCB2 switch 72a collectively opens and closes the control power supply 3 for the devices A2 and B2.
  • the MCCB3 switch 72b collectively opens and closes the control power supply 3 for the devices C2 and D2.
  • the AC / DC power supply device 73 converts the power from the AC uninterruptible power supply 4 from AC to DC and uses it as the power supply for the DC undervoltage detection circuit.
  • the undervoltage relay 74a takes in the control power supply 3 from the power supply side of the power supply division MCCB2 switch 72a and performs voltage level monitoring. When the voltage of the control power supply 3 becomes lower than the set voltage of the undervoltage relay 74, the internal contact is closed. In the magnetic contactor Y1 75a, the coil is excited when the contact is closed.
  • the undervoltage relay 74b takes in the control power supply 3 from the load side of the MCCB3 switch 72b and monitors the voltage level.
  • the internal contact is closed.
  • the electromagnetic contactor Y2 75b the coil is excited when the contact is closed.
  • the normally closed Y1 contact 76a of the electromagnetic contactor Y1 75a opens when the coil is excited and cuts off the power supply to the devices A5 and B5.
  • the normally closed Y2 contact 76b of the electromagnetic contactor Y2 75b opens when the coil is excited, and interrupts the power supply to the devices C5 and D5.
  • the MCCB2 switch 72a load side voltage is centrally monitored by the undervoltage relay 74a of the distribution board circuit 70a, and the power supply to the devices A5 and B5 is switched below an arbitrary set voltage. Since the power is cut off, the DC distribution board MCCB2 switch 72a can unify the operations when the devices A5 and B5 are turned on collectively or when the power is restored after the voltage drop, and the correctness check operation is not required.
  • the MCCB3 switch 72b load side voltage is centrally monitored by the undervoltage relay 74b of the distribution board circuit 70b, and the DC power distribution board MCCB3 is used to cut off the power supply to the devices C5 and D5 below an arbitrary set voltage.
  • the operation can be unified when the switch 72b is turned on to the device C5 and the device D5 at once or when the power is restored after the voltage drop, and the correctness check operation is not required.
  • the electric station protection control system 100 includes a DC distribution board 90 shown in FIG. 9 and four devices A3 to D3 shown in FIG.
  • the power source is duplicated by the control power source 5 and the control power source 6. Further, the DC distribution board 90 is connected to the distribution board circuit 90a via the control power supply 5 receiving MCCB1 switch 91a, and is connected to the distribution board circuit 90b via the control power supply 6 receiving MCCB2 switch 91b.
  • the distribution board circuit 90a includes an AC / DC power supply 94 that receives power from the AC uninterruptible power supply 2, an undervoltage relay 95a that closes a contact when the voltage falls below a set voltage, and an auxiliary that excites a coil when the contact closes.
  • Relay 80X1 96a Further, the distribution board circuit 90b is branched and connected from the AC / DC power supply device 94 of the distribution board circuit 90a, and the undervoltage relay 95b whose contact is closed when the voltage is lower than the set voltage, and the coil is excited when the contact is closed.
  • Auxiliary relay 80X2 96b The operating voltage of the undervoltage relays 95a and 95b can be set arbitrarily.
  • the DC distribution board 90 is a conventional auxiliary relay 80A 93a, auxiliary relay 80B 93b, 80A contact 97a, 80B contact 97b, and either A or B, which is turned on and off in a normal state where it is not excited.
  • auxiliary relay 80B 93b 80A contact 97a, 80B contact 97b, and either A or B, which is turned on and off in a normal state where it is not excited.
  • devices A3, B3, C3, and D3 are provided on the load side of the MCCB3 switch 92a, MCCB4 switch 92b, MCCB5 switch 92c, and MCCB6 switch 92d for power supply division, respectively. Is connected.
  • a device A3 shown in FIG. 10 includes a DC / DC power supply device 101a that steps down the control power supply, a control unit 102a that controls each unit, a power supply abnormality detection latch circuit 106a that performs latching when a power supply abnormality is detected,
  • the auxiliary relay 80X1 and the auxiliary relay 80X2 that connect the control unit 102a and the power supply abnormality detection latch circuit 106a are provided.
  • the auxiliary relay 80X1 and the auxiliary relay 80X2 are arranged in parallel with each other, and each has normal close contacts 104a and 105a that open when the coil is excited and lock the power supply abnormality detection latch circuit 106a.
  • the control unit 102a is equipped with a power supply abnormality detection unit 103a.
  • the device B3, the device C3, and the device D3 are mounted on the DC / DC power supply devices 101b, 101c, and 101d, the control units 102b, 102c, and 102d, and the control units 102b, 102c, and 102d, respectively.
  • the AC / DC power supply device 94 converts the power from the AC uninterruptible power supply 2 from AC to DC to be used as a DC undervoltage detection circuit power supply.
  • the undervoltage relay 95a takes in the control power supply 5 from the load side of the MCCB1 switch 91a for receiving the control power supply 5 and monitors the voltage level. When the voltage of the control power supply 5 becomes lower than the set voltage of the undervoltage relay 95a, the internal contact is closed. In the auxiliary relay 80X1 96a, the coil is excited when the contact is closed.
  • the undervoltage relay 95b takes in the control power supply 6 from the load side of the MCCB2 switch 91b for receiving the control power supply 6 and monitors the voltage level.
  • the internal contact is closed.
  • the auxiliary relay 80X2 96b the coil is excited when the contact is closed.
  • the normally closed contact 104a of the auxiliary relay 80X1 and the normally closed contact 105a of the auxiliary relay 80X2 are opened when the coil is excited.
  • the power supply abnormality detection latch circuit 106a is locked. For this reason, the power supply abnormality detection latch circuit 106a does not operate, and the control mode lock and the alarm are not erroneously issued.
  • the normally closed contacts 104b, 104c, 104d of the auxiliary relay 80X1 and the normally closed contacts 105b, 105c, 105d of the auxiliary relay 80X2 are opened when the coil is excited.
  • the power supply abnormality detection latch circuits 106b, 106c, and 106d are locked, respectively. For this reason, the power supply abnormality detection latch circuits 106b, 106c, and 106d do not operate, and the control mode lock and the alarm are not erroneously issued.
  • the control power supply voltages of the devices A3 to D3 are centrally monitored by the DC distribution board 90, and the power supply abnormality detection latch circuits 106a and 106b of the devices A3 to D3 are below an arbitrary set voltage. , 106c and 106d can be locked, so that the operation can be unified when the control power supplies 5 and 6 are turned on collectively by the MCCB1 switch 91a and the MCCB2 switch 91b, or when the power supply is restored after an unexpected voltage drop. Become.
  • each device can be provided with an indicator for notifying that the control mode lock and alarm lock by the undervoltage relay are in progress.
  • the number of devices is four from A to D, but the number of devices can be any number.

Abstract

The purpose of the present invention is to reduce correctness verification work due to operation disunity of each device, when restoring power supply after an unexpected occurrence of under voltage and when switching on power en bloc after control-power-supply cut off in a DC distribution board. A DC distribution board (10) divides a power supply of a control power supply (1), and provides a power supply to a plurality of devices. Furthermore, the DC distribution board (10) is provided with: an AC/DC power supply device (13) which receives a power supply provided from an AC uninterruptible power supply (2); an under-voltage relay (14) which is driven by the AC/DC power supply device, and with which a contact point is closed if the control power supply (1) becomes equal to or less than a set voltage; and an auxiliary relay (15) which, as a result of energization of a coil when the contact point is closed, inhibits operation of circuits inside the plurality of devices.

Description

保護制御用分電盤及び電気所保護制御システムDistribution board for protection control and protection control system for electric station
　本発明の実施形態は、発電所、変電所、開閉所等の電気所を保護、制御するための分電盤及び該分電盤を用いた電気所保護制御システムに関する。 Embodiments of the present invention relate to a distribution board for protecting and controlling an electric station such as a power plant, a substation, and a switching station, and an electric station protection control system using the distribution board.
　図１１に、従来の電気所保護制御システムの概略について示す。この電気所保護制御システム１５０は、ＤＣ分電盤１１０及び該ＤＣ分電盤１１０に接続された複数の装置Ａ４～Ｄ４を備えている。ＤＣ分電盤１１０の入力側に設けられた制御電源６は、ＤＣ分電盤１１０のＭＣＣＢ１スイッチ１１１より４分割され、ＭＣＣＢ２スイッチ１１２ａ，ＭＣＣＢ３スイッチ１１２ｂ，ＭＣＣＢ４スイッチ１１２ｃ，ＭＣＣＢ５スイッチ１１２ｄを介して電源供給先の各装置Ａ４、Ｂ４、Ｃ４、Ｄ４にそれぞれ供給される。各装置Ａ４～Ｄ４は同一の構成を有しているので、以下、装置Ａ４、Ｂ４について説明する。 Fig. 11 shows an outline of a conventional electric station protection control system. The electric station protection control system 150 includes a DC distribution board 110 and a plurality of devices A4 to D4 connected to the DC distribution board 110. The control power supply 6 provided on the input side of the DC distribution board 110 is divided into four by the MCCB1 switch 111 of the DC distribution board 110, and is supplied via the MCCB2 switch 112a, MCCB3 switch 112b, MCCB4 switch 112c, and MCCB5 switch 112d. It is supplied to each of the devices A4, B4, C4, and D4 as the supply destination. Since the devices A4 to D4 have the same configuration, the devices A4 and B4 will be described below.
　装置Ａ４では、制御電源をＤＣ／ＤＣ電源装置１１３ａで降圧し、この降圧した電源を制御ユニット１１４ａへ供給する。制御ユニット１１４ａは、電源異常検出部１１５ａを実装しており、電圧レベル監視により電源異常を検出した場合、電源異常検出ラッチ回路１１６ａでラッチし、制御モードロック１１７ａへの移行及び警報１１８ａを発報する。 In the device A4, the control power source is stepped down by the DC / DC power source device 113a, and the stepped down power source is supplied to the control unit 114a. The control unit 114a is equipped with a power supply abnormality detection unit 115a. When a power supply abnormality is detected by voltage level monitoring, the control unit 114a latches the power supply abnormality detection latch circuit 116a and issues a transition to the control mode lock 117a and an alarm 118a. To do.
　装置Ｂ４においても、装置Ａ４と同様に、ＤＣ／ＤＣ電源装置１１３ｂで降圧した電源を制御ユニット１１４ｂの電源異常検出部１１５ｂで電圧レベル監視し、電源異常を検出した場合は、電源異常検出ラッチ回路１１６ｂでラッチし、制御モードロック１１７ｂへの移行及び警報１１８ｂを発報する。 In the device B4 as well as the device A4, the power supply voltage step-down by the DC / DC power supply device 113b is monitored by the power supply abnormality detection unit 115b of the control unit 114b, and when a power supply abnormality is detected, the power supply abnormality detection latch circuit Latch at 116b and issue a transition to control mode lock 117b and alarm 118b.
　図１２に、単回路構成である電気所保護制御システム１５０を複回路にした電気所保護制御システムの構成について示す。この電気所保護制御システム１６０では、ＤＣ分電盤１２０において装置用制御電源がＭＣＣＢ１スイッチ１２１より２分割され、ＭＣＣＢ２スイッチ１２２ａを介して電源供給先の装置Ａ５、装置Ｂ５に供給される一方、ＭＣＣＢ３スイッチ１２２ｂを介して電源供給先の装置Ｃ５、装置Ｄ５に供給される以外は、電気所保護制御システム１５０と同様の構成を備えている。 FIG. 12 shows a configuration of an electric station protection control system in which the electric station protection control system 150 having a single circuit configuration is formed as a multiple circuit. In this electric station protection control system 160, the control power supply for the device is divided into two by the MCCB1 switch 121 in the DC distribution board 120 and supplied to the devices A5 and B5 as power supply destinations through the MCCB2 switch 122a, while MCCB3 The configuration is the same as that of the electric station protection control system 150 except that power is supplied to the devices C5 and D5 that are power supply destinations via the switch 122b.
　上記の電気所保護制御システム１５０の運転に際しては、ＤＣ分電盤１１０での制御電源６遮断後の一括投入時または不慮の電圧低下後の電源復電時に、制御ユニット１１４ａ、１１４ｂの電源異常検出部１１５ａ、１１５ｂにおける電源異常検出電圧等の個体誤差により、制御モードロック１１７ａ、１１７ｂへの移行の有無及び警報１１８ａ、１１８ｂ発報の有無について、各装置で動作の不統一が生じる場合がある。また、同様の理由により電気所保護制御システム１６０においても各装置で動作の不統一が生じる場合がある。この動作の不統一について以下に具体的に説明する。 During the operation of the electric station protection control system 150 described above, the power supply abnormality detection of the control units 114a and 114b is detected at the time of turning on the power after the control power supply 6 is cut off at the DC distribution board 110 or at the time of power recovery after an unexpected voltage drop. Due to individual errors such as the power supply abnormality detection voltage in the units 115a and 115b, inconsistencies in operation may occur in each device regarding the presence or absence of the transition to the control mode locks 117a and 117b and the presence or absence of the alarms 118a and 118b. Further, for the same reason, in the electric station protection control system 160, the operation may be inconsistent among the devices. This inconsistency in operation will be specifically described below.
　図１３は、従来の電気所保護制御システム１５０の電源異常動作に関するタイムチャートである。なお、この図は、装置Ａ４と装置Ｂ４の電源異常検出電圧が相違する場合の電源復電時の動作の違いを示すものである。 FIG. 13 is a time chart relating to the power supply abnormal operation of the conventional electric station protection control system 150. This figure shows the difference in operation at the time of power recovery when the power supply abnormality detection voltages of the devices A4 and B4 are different.
　先ず、制御電源電圧Ｖ１が装置Ａ４の制御ユニット動作可能電圧Ｖ２以上になると、時刻Ｔ１において電源異常検出部１１５ａが動作し、さらに装置Ｂ４の制御ユニット動作可能電圧Ｖ３以上になると、時刻Ｔ２において電源異常検出部１１５ｂが即時動作する。しかし、まだ電源異常検出ラッチ回路動作電圧Ｖ５に達していないため電源異常検出ラッチ回路１１６ａ、１１６ｂは動作しない。その後、電源異常検出ラッチ回路動作電圧Ｖ５まで上昇したときは（時刻Ｔ４）、装置Ａ４では電源異常検出部１１５ａの動作時刻（Ｔ１～Ｔ３）を経過しているので、電源異常検出ラッチ回路１１６ａは動作しない。 First, when the control power supply voltage V1 becomes equal to or higher than the control unit operable voltage V2 of the device A4, the power supply abnormality detection unit 115a operates at the time T1, and when the control power supply operable voltage V3 of the device B4 becomes equal to or higher than the power supply at the time T2. The abnormality detection unit 115b operates immediately. However, since the power supply abnormality detection latch circuit operating voltage V5 has not yet been reached, the power supply abnormality detection latch circuits 116a and 116b do not operate. Thereafter, when the power supply abnormality detection latch circuit operating voltage V5 rises (time T4), since the operation time (T1 to T3) of the power supply abnormality detection unit 115a has elapsed in the device A4, the power supply abnormality detection latch circuit 116a Do not work.
　これに対して、装置Ｂ４では、時刻Ｔ４において電源異常検出部１１５ｂの動作時刻内（Ｔ２～Ｔ５）であるため、電源異常検出ラッチ回路１１６ｂが動作し、制御モードロック１１７ｂ及び警報１１８ｂが発報される。この時の装置Ｂ４の制御モードロック１１７ｂ及び警報１１８ｂは不必要な動作であり、運転上正誤確認作業が必要となってしまう。 On the other hand, in the device B4, since it is within the operation time (T2 to T5) of the power supply abnormality detection unit 115b at time T4, the power supply abnormality detection latch circuit 116b operates and the control mode lock 117b and the alarm 118b are triggered. Is done. At this time, the control mode lock 117b and the alarm 118b of the device B4 are unnecessary operations, and it is necessary to confirm correctness during operation.
特開２０００－１７５３５９号公報JP 2000-175359 A
　本発明の実施形態は、ＤＣ分電盤での制御電源遮断後の一括投入時及び不慮の電圧低下後の電源復電時において、各装置の動作不統一による正誤確認作業を削減することを目的とする。 An object of the present invention is to reduce the correctness / incorrectness confirmation work due to the inconsistent operation of each device at the time of collective turning on after the control power supply is cut off in the DC distribution board and at the time of power recovery after an unexpected voltage drop. And
　本発明の実施形態は、制御電源の電源分割を行うとともに、複数の装置に対して電源供給を行う保護制御用分電盤であって、無停電電源から電源の供給を受ける電源装置と、前記電源装置によって駆動し、前記制御電源が設定電圧以下になると接点が閉じる不足電圧リレーと、前記接点が閉じるとコイルが励磁されることにより、前記複数の装置内の回路の動作を抑制する抑制手段と、を備えることを特徴とする。 An embodiment of the present invention is a protective control distribution board that performs power supply division of a control power supply and supplies power to a plurality of devices, the power supply device receiving power supply from an uninterruptible power supply, and An undervoltage relay that is driven by a power supply device and closes a contact when the control power source is lower than a set voltage, and a suppression means that suppresses the operation of the circuits in the plurality of devices by exciting a coil when the contact is closed. And.
　また、本発明の他の実施形態は、制御電源の電源分割を行うとともに、複数の装置に対して電源供給を行う保護制御用分電盤及び当該分電盤と接続された複数の装置を有する電気所保護制御システムであって、前記保護制御用分電盤は、無停電電源から電源の供給を受ける電源装置と、前記電源装置によって駆動し、前記制御電源が設定電圧以下になると接点が閉じる不足電圧リレーと、前記接点が閉じるとコイルが励磁されることにより、前記複数の装置内の回路の動作を抑制する抑制手段と、を備え、前記装置は、制御電源を降圧するＤＣ電源装置と、前記制御電源の電源の異常を検出する電源異常検出部と、該電源異常検出部により電源の異常を検出するとラッチを行う電源異常検出ラッチ回路と、前記電源異常検出部及び前記電源異常検出ラッチ回路を接続するとともに、前記抑制手段における前記コイルが励磁されると開き、前記電源異常検出ラッチ回路をロックするノーマルクローズ接点を有する補助リレーと、を備えることを特徴とする。 Another embodiment of the present invention includes a protection control distribution board that divides a control power supply and supplies power to a plurality of apparatuses, and a plurality of apparatuses connected to the distribution board. An electrical station protection control system, wherein the protection control distribution board is driven by a power supply device that is supplied with power from an uninterruptible power supply, and the contact is closed when the control power supply falls below a set voltage. An undervoltage relay, and a suppression unit that suppresses the operation of the circuits in the plurality of devices by exciting the coil when the contact is closed, and the device includes a DC power supply device that steps down the control power supply; A power supply abnormality detection unit that detects a power supply abnormality of the control power supply, a power supply abnormality detection latch circuit that latches when a power supply abnormality is detected by the power supply abnormality detection unit, the power supply abnormality detection unit, and the power supply With connecting atmospheric detection latch circuit opens and the coil in the suppressing means is energized, characterized in that it comprises an auxiliary relay having a normally closed contact for locking the power supply abnormality detection latch circuit.
第１の実施形態に係る電気所保護制御システムのＤＣ分電盤の構成を示す概略図である。It is the schematic which shows the structure of DC distribution board of the electric station protection control system which concerns on 1st Embodiment. 第１の実施形態に係る電気所保護制御システムの各装置の構成を示す概略図である。It is the schematic which shows the structure of each apparatus of the electric station protection control system which concerns on 1st Embodiment. 第１の実施形態に係る電気所保護制御システムの電源異常動作に関するタイムチャートである。It is a time chart regarding the power supply abnormal operation | movement of the electric station protection control system which concerns on 1st Embodiment. 第２の実施形態に係る電気所保護制御システムのＤＣ分電盤の構成を示す概略図である。It is the schematic which shows the structure of DC distribution board of the electric station protection control system which concerns on 2nd Embodiment. 第２の実施形態に係る電気所保護制御システムの電源異常動作に関するタイムチャートである。It is a time chart regarding the power supply abnormal operation | movement of the electric station protection control system which concerns on 2nd Embodiment. 第３の実施形態に係る電気所保護制御システムのＤＣ分電盤の構成を示す概略図である。It is the schematic which shows the structure of DC distribution board of the electric station protection control system which concerns on 3rd Embodiment. 第３の実施形態に係る電気所保護制御システムの各装置の構成を示す概略図である。It is the schematic which shows the structure of each apparatus of the electric station protection control system which concerns on 3rd Embodiment. 第４の実施形態に係る電気所保護制御システムのＤＣ分電盤の構成を示す概略図である。It is the schematic which shows the structure of the DC distribution board of the electric station protection control system which concerns on 4th Embodiment. 第５の実施形態に係る電気所保護制御システムのＤＣ分電盤の構成を示す概略図である。It is the schematic which shows the structure of DC distribution board of the electric station protection control system which concerns on 5th Embodiment. 第５の実施形態に係る電気所保護制御システムの各装置の構成を示す概略図である。It is the schematic which shows the structure of each apparatus of the electric station protection control system which concerns on 5th Embodiment. 従来の電気所保護制御システムの構成を示す概略図である。It is the schematic which shows the structure of the conventional electric station protection control system. 従来の他の電気所保護制御システムの構成を示す概略図である。It is the schematic which shows the structure of the other conventional electric station protection control system. 従来の電気所保護制御システムの電源異常動作に関するタイムチャートである。It is a time chart regarding the power supply abnormal operation of the conventional electric station protection control system.
　以下、本発明の実施形態について、図面を参照して具体的に説明する。 Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
［第１の実施形態］
（構成）
　本発明の第１の実施形態に係る電気所保護制御システム２０は、図１に示すＤＣ分電盤１０と、図２に示す４つの装置Ａ１～装置Ｄ１とで構成される。 [First Embodiment]
(Constitution)
The electric station protection control system 20 according to the first embodiment of the present invention includes the DC distribution board 10 shown in FIG. 1 and the four devices A1 to D1 shown in FIG.
　図１に示すＤＣ分電盤１０は、ＡＣ無停電電源２から電源の供給を受けるＡＣ／ＤＣ電源装置１３と、設定電圧以下になると接点が閉じる不足電圧リレー１４と、前記接点が閉じるとコイルが励磁される補助リレー８０Ｘ　１５とで構成される。また、制御電源１は、ＤＣ分電盤１０より装置の数だけ分岐され、図２に示す装置Ａ１～装置Ｄ１と接続される。なお、不足電圧リレー１４の動作電圧は、任意に設定することができる。 A DC distribution board 10 shown in FIG. 1 includes an AC / DC power supply device 13 that receives power from an AC uninterruptible power supply 2, an undervoltage relay 14 that closes when the voltage falls below a set voltage, and a coil that closes when the contact closes. Is composed of an auxiliary relay 80X15 that is excited. Further, the control power supply 1 is branched from the DC distribution board 10 by the number of devices, and is connected to the devices A1 to D1 shown in FIG. The operating voltage of the undervoltage relay 14 can be arbitrarily set.
　図２に示す装置Ａ１は、制御電源を降圧するＤＣ／ＤＣ電源装置２１ａと、各部の制御を行う制御ユニット２２ａと、電源の異常を検出するとラッチを行う電源異常検出ラッチ回路２５ａと、制御ユニット２２ａ及び電源異常検出ラッチ回路２５ａを接続する補助リレー８０Ｘ、とを備えている。補助リレー８０Ｘは、コイルが励磁すると開き、電源異常検出ラッチ回路２５ａをロックするノーマルクローズ接点２４ａを有している。また、制御ユニット２２ａは、電源異常検出部２３ａを実装している。 A device A1 shown in FIG. 2 includes a DC / DC power supply device 21a that steps down the control power supply, a control unit 22a that controls each unit, a power supply abnormality detection latch circuit 25a that latches when a power supply abnormality is detected, and a control unit 22a and an auxiliary relay 80X for connecting the power supply abnormality detection latch circuit 25a. The auxiliary relay 80X has a normally closed contact 24a that opens when the coil is excited and locks the power supply abnormality detection latch circuit 25a. In addition, the control unit 22a is equipped with a power supply abnormality detection unit 23a.
　装置Ｂ１、装置Ｃ１、装置Ｄ１も、装置Ａ１と同様に、それぞれ、ＤＣ／ＤＣ電源装置２１ｂ、２１ｃ、２１ｄと、制御ユニット２２ｂ、２２ｃ、２２ｄと、制御ユニット２２ｂ、２２ｃ、２２ｄに実装された電源異常検出部２３ｂ、２３ｃ、２３ｄと、ノーマルクローズ接点２４ｂ、２４ｃ、２４ｄを有する補助リレー８０Ｘと、電源異常検出ラッチ回路２５ｂ、２５ｃ、２５ｄと、を備えている。 Similarly to the device A1, the device B1, the device C1, and the device D1 are mounted on the DC / DC power supply devices 21b, 21c, and 21d, the control units 22b, 22c, and 22d, and the control units 22b, 22c, and 22d, respectively. Power supply abnormality detection units 23b, 23c, and 23d, auxiliary relays 80X having normally closed contacts 24b, 24c, and 24d, and power supply abnormality detection latch circuits 25b, 25c, and 25d are provided.
（作用）
　まず、図１に示すＤＣ分電盤１０各部の作用について説明する。
　ＡＣ／ＤＣ電源装置１３は、ＡＣ無停電電源２からの電源をＡＣからＤＣに変換し、ＤＣ不足電圧検出回路用電源とする。不足電圧リレー１４は、ＭＣＣＢ２スイッチ１２ａの電源側から制御電源１を取り込み、電圧レベル監視を行う。制御電源１の電圧が不足電圧リレー１４の設定電圧以下となると、内部接点が閉じる。補助リレー８０Ｘ　１５では、前記接点が閉じるとコイルが励磁される。 (Function)
First, the operation of each part of the DC distribution board 10 shown in FIG. 1 will be described.
The AC / DC power supply device 13 converts the power from the AC uninterruptible power supply 2 from AC to DC, and uses it as a power supply for a DC undervoltage detection circuit. The undervoltage relay 14 takes in the control power supply 1 from the power supply side of the MCCB2 switch 12a and performs voltage level monitoring. When the voltage of the control power supply 1 becomes lower than the set voltage of the undervoltage relay 14, the internal contact is closed. In the auxiliary relay 80X15, the coil is excited when the contact is closed.
　次に、図２の各装置各部の作用について、装置Ａ１及び装置Ｂ１を取り上げて説明する。なお、装置Ｃ１～装置Ｄ１についても同様の作用を有するため、説明を省略する。 Next, the operation of each part of each device in FIG. 2 will be described by taking up device A1 and device B1. Since the devices C1 to D1 have the same operation, description thereof is omitted.
　図３は、第１の実施形態に係る電気所保護制御システム２０の電源異常動作に関するタイムチャートである。なお、本図は、装置Ａ１と装置Ｂ１の電源異常検出電圧が相違する場合の電源復電時の動作の違いを示すものである。即ち、ＭＣＣＢ１スイッチ１１による装置Ａ１～Ｄ１への制御電源１の一括投入時の装置Ａ１とＢ１の動作を示している。 FIG. 3 is a time chart relating to the power supply abnormal operation of the electric station protection control system 20 according to the first embodiment. This figure shows the difference in operation at the time of power recovery when the power failure detection voltages of the device A1 and the device B1 are different. That is, the operation of the devices A1 and B1 when the control power supply 1 is collectively turned on to the devices A1 to D1 by the MCCB1 switch 11 is shown.
　先ず、制御電源１の電圧Ｖ１が装置Ａ１の制御ユニット２２ａの動作可能電圧Ｖ２以上になると、時刻Ｔ１において電源異常検出部２３ａが動作し、さらに装置Ｂ１の制御ユニット動作可能電圧Ｖ３以上になると、時刻Ｔ２において電源異常検出部２３ｂが即時動作する。しかし、まだ電源異常検出ラッチ回路の動作電圧Ｖ５に達していないため、電源異常検出ラッチ回路２５ａ、２５ｂは動作しない。その後、電源異常検出ラッチ回路２５ａ、２５ｂの動作電圧Ｖ５まで上昇したとき（時刻Ｔ４）、装置Ａ１では電源異常検出部２３ａの動作時刻（Ｔ１～Ｔ３）を経過しているので、電源異常検出ラッチ回路２５ａは動作しない。 First, when the voltage V1 of the control power supply 1 becomes equal to or higher than the operable voltage V2 of the control unit 22a of the device A1, the power supply abnormality detection unit 23a operates at the time T1, and further becomes equal to or higher than the control unit operable voltage V3 of the device B1. At time T2, the power supply abnormality detection unit 23b operates immediately. However, since the operating voltage V5 of the power supply abnormality detection latch circuit has not yet been reached, the power supply abnormality detection latch circuits 25a and 25b do not operate. Thereafter, when the operating voltage V5 of the power supply abnormality detection latch circuits 25a and 25b rises (time T4), since the operation time (T1 to T3) of the power supply abnormality detection unit 23a has elapsed in the device A1, the power supply abnormality detection latch The circuit 25a does not operate.
　これに対して、図１１及び図１２に示す従来のシステムでは、電源異常検出ラッチ回路の動作電圧Ｖ５に到達した時点で、装置Ｂ５の電源異常検出部１２５ｂが動作しているため、電源異常検出ラッチ回路１２６ｂが動作し、制御モードロック１２７ｂ及び警報１２８ｂが発報される。 On the other hand, in the conventional system shown in FIGS. 11 and 12, since the power supply abnormality detection unit 125b of the device B5 is operating when the operating voltage V5 of the power supply abnormality detection latch circuit is reached, the power supply abnormality detection is performed. The latch circuit 126b operates, and the control mode lock 127b and the alarm 128b are issued.
　しかし、本実施形態のシステム２０では、不足電圧リレー１４の内部接点は閉し、補助リレー８０Ｘのノーマルクローズ接点２４ｂは開いている（時刻Ａ）ため、電源異常検出ラッチ回路２５ｂは動作しない（Ｂ部分）。このため、制御モードロック及び警報が誤発報されることがない。 However, in the system 20 of the present embodiment, the internal contact of the undervoltage relay 14 is closed and the normally closed contact 24b of the auxiliary relay 80X is open (time A), so the power supply abnormality detection latch circuit 25b does not operate (B portion). For this reason, the control mode lock and the alarm are not erroneously issued.
（効果）
　以上説明したように、本実施形態では、装置Ａ１～Ｄ１の制御電源１の電圧をＤＣ分電盤１０の不足電圧リレー１４で集中監視し、任意設定の電圧以下で、装置Ａ１～Ｄ１の電源異常検出ラッチ回路２５ａ、２５ｂ、２５ｃ、２５ｄを同時にロックできるため、ＤＣ分電盤１０のＭＣＣＢ１スイッチ１１による装置Ａ１～Ｄ１への制御電源１の一括投入時、または不慮の電圧低下後の電源復電時において装置動作統一が図れ、正誤確認作業は不要となる。 (effect)
As described above, in the present embodiment, the voltage of the control power supply 1 of the devices A1 to D1 is centrally monitored by the undervoltage relay 14 of the DC distribution board 10, and the power supply of the devices A1 to D1 is below an arbitrarily set voltage. Since the abnormality detection latch circuits 25a, 25b, 25c, and 25d can be locked simultaneously, the power supply recovery after the control power supply 1 is turned on collectively to the devices A1 to D1 by the MCCB1 switch 11 of the DC distribution board 10 or after an unexpected voltage drop. The device operation can be unified during power transmission, and correctness check work is not required.
［第２の実施形態］
（構成）
　本発明の第２の実施形態に係る電気所保護制御システム４０は、図４に示すＤＣ分電盤３０と、図１１に示す従来の４つの装置Ａ４～Ｄ４とで構成される。 [Second Embodiment]
(Constitution)
The electric station protection control system 40 according to the second embodiment of the present invention includes a DC distribution board 30 shown in FIG. 4 and four conventional devices A4 to D4 shown in FIG.
　図４に示すＤＣ分電盤３０は、ＡＣ無停電電源２から電源の供給を受けるＡＣ／ＤＣ電源装置３３と、設定電圧以下になると接点が閉じる不足電圧リレー３４と、前記接点が閉じるとコイルが励磁される電磁接触器Ｙ（３５）と、電磁接触器Ｙ（３５）のノーマルクローズＹ接点３６とで構成される。電磁接触器Ｙ（３５）のノーマルクローズＹ接点３６は、コイルが励磁すると開き、装置Ａ４～装置Ｄ４への電源供給を遮断する。また、制御電源１は、ＤＣ分電盤３０より装置の数だけ分岐され、図１１に示す装置Ａ４～装置Ｄ４と接続される。なお、不足電圧リレー３４の動作電圧は任意に設定ができる。 The DC distribution board 30 shown in FIG. 4 includes an AC / DC power supply device 33 that receives power from the AC uninterruptible power supply 2, an undervoltage relay 34 that closes when the voltage falls below a set voltage, and a coil that closes when the contact is closed. Is constituted by an electromagnetic contactor Y (35) in which is excited and a normally closed Y contact 36 of the electromagnetic contactor Y (35). The normally closed Y contact 36 of the electromagnetic contactor Y (35) opens when the coil is excited, and cuts off the power supply to the devices A4 to D4. Further, the control power supply 1 is branched from the DC distribution board 30 by the number of devices and connected to the devices A4 to D4 shown in FIG. The operating voltage of the undervoltage relay 34 can be arbitrarily set.
（作用）
　次に、図４のＤＣ分電盤３０の各部の作用について説明する。 (Function)
Next, the operation of each part of the DC distribution board 30 in FIG. 4 will be described.
　ＡＣ／ＤＣ電源装置３３は、ＡＣ無停電電源２からの電源をＡＣからＤＣに変換し、ＤＣ不足電圧検出回路用電源とする。不足電圧リレー３４は、電源分割ＭＣＣＢ２スイッチ３２ａの電源側から制御電源１を取り込み、電圧レベル監視を行う。制御電源１の電圧が不足電圧リレー３４の設定電圧以下となると内部接点が閉じる。電磁接触器Ｙ（３５）では、前記接点が閉じるとコイルが励磁される。 The AC / DC power supply device 33 converts the power from the AC uninterruptible power supply 2 from AC to DC, and uses it as the power supply for the DC undervoltage detection circuit. The undervoltage relay 34 takes in the control power supply 1 from the power supply side of the power supply division MCCB2 switch 32a and performs voltage level monitoring. When the voltage of the control power supply 1 becomes lower than the set voltage of the undervoltage relay 34, the internal contact is closed. In the electromagnetic contactor Y (35), the coil is excited when the contact is closed.
　図５は、第２の実施形態に係る電気所保護制御システムの電源異常動作に関するタイムチャートである。なお、本図は、装置Ａ４と装置Ｂ４の電源異常検出電圧が相違する場合の電源復電時の動作の違いを示すものである。即ち、ＭＣＣＢ１スイッチ３１による装置Ａ４～Ｄ４の制御電源１への一括投入時の装置Ａ４とＢ４の動作を示している。 FIG. 5 is a time chart relating to the power supply abnormal operation of the electric station protection control system according to the second embodiment. This figure shows the difference in operation at the time of power recovery when the power supply abnormality detection voltages of the devices A4 and B4 are different. That is, the operation of the devices A4 and B4 when the devices A4 to D4 are collectively turned on by the MCCB1 switch 31 is shown.
　図１１に示す従来のシステムでは、電源異常検出ラッチ回路の動作電圧Ｖ５に到達した時点（時刻Ｔ４）で、装置Ｂ４の電源異常検出部１１５ｂが動作しているため電源異常検出ラッチ回路１１６ｂは動作するところである。 In the conventional system shown in FIG. 11, when the operating voltage V5 of the power supply abnormality detection latch circuit is reached (time T4), the power supply abnormality detection unit 115b of the device B4 is operating, so the power supply abnormality detection latch circuit 116b operates. I'm about to do it.
　これに対して、本実施形態のシステム４０では、時刻Ｔ４と同時刻である時刻Ｃにおいて、不足電圧リレー３４の内部接点は閉し電磁接触器Ｙ（３５）及びノーマルクローズＹ接点３６は開いている。このため、制御電源電圧（装置側）は、ＤＣ分電盤の動作電圧Ｖ８となるまで（即ち、Ｔ６まで）０Ｖであり、電源異常検出ラッチ回路１１６ｂは動作しない（Ｄ部分）。このため、制御モードロック及び警報が誤発報されることがない。 On the other hand, in the system 40 of this embodiment, at the time C, which is the same time as the time T4, the internal contact of the undervoltage relay 34 is closed and the electromagnetic contactor Y (35) and the normally closed Y contact 36 are opened. Yes. For this reason, the control power supply voltage (device side) is 0 V until the operating voltage V8 of the DC distribution board is reached (that is, until T6), and the power supply abnormality detection latch circuit 116b does not operate (D portion). For this reason, the control mode lock and the alarm are not erroneously issued.
（効果）
　以上説明したように、本実施形態では、装置Ａ４～装置Ｄ４の制御電源電圧をＤＣ分電盤３０の不足電圧リレー３４で集中監視し、任意の設定電圧以下では、装置Ａ４～装置Ｄ４への供給電源を遮断するため、装置動作不統一となる電圧域では、電圧レベルを０Ｖとして、電源供給先装置の電源異常検出ラッチ回路１１６ａ、１１６ｂ、１１６ｃ、１１６ｄの動作を抑制できる。このため、ＤＣ分電盤３０のＭＣＣＢ１スイッチ３１による制御電源１の一括投入時、または不慮の電圧低下後の電源復電時、装置動作統一が図れ、正誤確認作業は不要となる。 (effect)
As described above, in the present embodiment, the control power supply voltage of the devices A4 to D4 is centrally monitored by the undervoltage relay 34 of the DC distribution board 30, and when the voltage is lower than an arbitrary set voltage, the devices A4 to D4 are connected to the devices A4 to D4. In order to shut off the power supply, the voltage level is set to 0 V in the voltage range where the device operation becomes ununiform, and the operation of the power supply abnormality detection latch circuits 116a, 116b, 116c, 116d of the power supply destination device can be suppressed. For this reason, when the control power supply 1 is turned on collectively by the MCCB1 switch 31 of the DC distribution board 30 or when the power supply is restored after an unexpected voltage drop, the operation of the apparatus can be unified, and correctness check work becomes unnecessary.
［第３の実施形態］
（構成）
　本発明の第３の実施形態に係る電気所保護制御システム６０は、図６に示すＤＣ分電盤５０と、図７に示す４つの装置Ａ２～Ｄ２とで構成される。 [Third Embodiment]
(Constitution)
The electric station protection control system 60 according to the third embodiment of the present invention includes a DC distribution board 50 shown in FIG. 6 and four devices A2 to D2 shown in FIG.
　ＤＣ分電盤５０は、装置Ａ２及び装置Ｂ２を対象とする分電盤回路５０ａと、装置Ｃ２及び装置Ｄ２を対象とする分電盤回路５０ｂからなっている。分電盤回路５０ａは、ＡＣ無停電電源４から電源の供給を受けるＡＣ／ＤＣ電源装置５３と、設定電圧以下になると接点が閉じる不足電圧リレー５４ａと、接点が閉じるとコイルが励磁される補助リレー８０Ｘ１　５５ａと、ＭＣＣＢ２スイッチ５２ａが入で閉じる補助接点５６ａと、を有している。 The DC distribution board 50 includes a distribution board circuit 50a for the devices A2 and B2, and a distribution board circuit 50b for the devices C2 and D2. The distribution board circuit 50a includes an AC / DC power supply 53 that receives power from the AC uninterruptible power supply 4, an undervoltage relay 54a that closes a contact when the voltage falls below a set voltage, and an auxiliary that energizes a coil when the contact closes. The relay 80X1 55a and the auxiliary contact 56a that is closed when the MCCB2 switch 52a is turned on are provided.
　また、分電盤回路５０ｂは、分電盤回路５０ａのＡＣ／ＤＣ電源装置５３から分岐して接続されるとともに設定電圧以下になると接点が閉じる不足電圧リレー５４ｂと、接点が閉じるとコイルが励磁される補助リレー８０Ｘ２　５５ｂとを有し、不足電圧リレー５４ｂ及び補助リレー８０Ｘ２　５５ｂの間には、ＭＣＣＢ３スイッチ５２ｂが入で閉じる補助接点５６ｂが設けられている。 The distribution board circuit 50b is branched and connected from the AC / DC power supply device 53 of the distribution board circuit 50a, and the undervoltage relay 54b that closes the contact when the voltage is lower than the set voltage, and the coil is excited when the contact is closed. And an auxiliary contact 56b that is closed when the MCCB3 switch 52b is turned on between the undervoltage relay 54b and the auxiliary relay 80X2 55b.
　さらに、分電盤回路５０ｂには、ＭＣＣＢ２スイッチ５２ａの負荷側電圧用に設けられた不足電圧リレー５４ａの接点出力を受けた接点増幅用の補助リレー８０Ｘ１　５５ａの接点５７ａと、ＭＣＣＢ３スイッチ５２ｂの負荷側電圧用に設けられた不足電圧リレー５４ｂの接点出力を受けた接点増幅用補助リレー８０Ｘ２　５５ｂの接点５７ｂとのＯＲ条件とし、これらの接点のいずれかが閉じるとコイルが励磁される補助リレー８０Ｘ３　５５ｃが設けられている。 Further, the distribution board circuit 50b includes a contact 57a of the auxiliary relay 80X1 55a for contact amplification that receives the contact output of the undervoltage relay 54a provided for the load side voltage of the MCCB2 switch 52a, and a load of the MCCB3 switch 52b. The contact relay amplifying relay 80X2 receiving the contact output of the undervoltage relay 54b provided for the side voltage is set to an OR condition with the contact 57b of the contact 55b, and the auxiliary relay 80X3 in which the coil is excited when any of these contacts is closed. 55c is provided.
　また、図６に示すＤＣ分電盤５０では、電源分割用のＭＣＣＢ２スイッチ５２ａの負荷側に装置Ａ２及びＢ２が接続される一方、ＭＣＣＢ３スイッチ５２ｂの負荷側に装置Ｃ２及びＤ２が接続されている。 In the DC distribution board 50 shown in FIG. 6, the devices A2 and B2 are connected to the load side of the MCCB2 switch 52a for power supply division, while the devices C2 and D2 are connected to the load side of the MCCB3 switch 52b. .
　図７に示す装置Ａ２は、制御電源を降圧するＤＣ／ＤＣ電源装置６３ａと、各部の制御を行う制御ユニット６４ａと、電源の異常を検出するとラッチを行う電源異常検出ラッチ回路６７ａと、制御ユニット６４ａ及び電源異常検出ラッチ回路６７ａを接続する補助リレー８０Ｘ３、とを備えている。補助リレー８０Ｘ３は、コイルが励磁すると開き、電源異常検出ラッチ回路６７ａをロックするノーマルクローズ接点６６ａを有している。また、制御ユニット６４ａは、電源異常検出部６５ａを実装している。 The apparatus A2 shown in FIG. 7 includes a DC / DC power supply apparatus 63a that steps down the control power supply, a control unit 64a that controls each part, a power supply abnormality detection latch circuit 67a that latches when a power supply abnormality is detected, and a control unit 64a and an auxiliary relay 80X3 connecting the power supply abnormality detection latch circuit 67a. The auxiliary relay 80X3 has a normally closed contact 66a that opens when the coil is excited and locks the power supply abnormality detection latch circuit 67a. The control unit 64a is equipped with a power supply abnormality detection unit 65a.
　装置Ｂ２、装置Ｃ２、装置Ｄ２も、装置Ａ２と同様に、それぞれ、ＤＣ／ＤＣ電源装置６３ｂ、６３ｃ、６３ｄと、制御ユニット６４ｂ、６４ｃ、６４ｄと、制御ユニット６４ｂ、６４ｃ、６４ｄに実装された電源異常検出部６５ｂ、６５ｃ、６５ｄと、ノーマルクローズ接点６６ｂ、６６ｃ、６６ｄを有する補助リレー８０Ｘと、電源異常検出ラッチ回路６７ｂ、６７ｃ、６７ｄと、を備えている。 Similarly to the device A2, the devices B2, C2, and D2 are mounted on the DC / DC power supply devices 63b, 63c, and 63d, the control units 64b, 64c, and 64d, and the control units 64b, 64c, and 64d, respectively. Power supply abnormality detection units 65b, 65c, 65d, auxiliary relays 80X having normally closed contacts 66b, 66c, 66d, and power supply abnormality detection latch circuits 67b, 67c, 67d are provided.
（作用）
　まず、図６に示すＤＣ分電盤５０の各部の作用を説明する。
　制御電源３は、ＭＣＣＢ１スイッチ５１を介してＭＣＣＢ２スイッチ５２ａとＭＣＣＢ３スイッチ５２ｂにて電源分割される。ＭＣＣＢ２スイッチ５２ａは、装置Ａ２と装置Ｂ２に対して制御電源３を一括で開閉する。他方、ＭＣＣＢ３スイッチ５２ｂは、装置Ｃ２～Ｄ２に対して制御電源３を一括で開閉する。 (Function)
First, the operation of each part of the DC distribution board 50 shown in FIG. 6 will be described.
The control power supply 3 is divided by the MCCB2 switch 52a and the MCCB3 switch 52b via the MCCB1 switch 51. The MCCB2 switch 52a collectively opens and closes the control power supply 3 for the devices A2 and B2. On the other hand, the MCCB3 switch 52b collectively opens and closes the control power supply 3 for the devices C2 to D2.
　分電盤回路５０ａにおいて、ＡＣ／ＤＣ電源装置５３は、ＡＣ無停電電源４からの電源をＡＣからＤＣに変換してＤＣ不足電圧検出回路用電源とし、不足電圧リレー５４ａは、ＭＣＣＢ２スイッチ５２ａの負荷側から制御電源３を取り込み電圧レベル監視を行う。制御電源３の電圧が不足電圧リレー５４ａの設定電圧以下となると内部接点が閉じる。補助リレー８０Ｘ１　５５ａは、不足電圧リレー５４ａの内部接点が閉でかつＭＣＣＢ２スイッチ５２ａ入でＭＣＣＢ２補助接点５６ａが閉のとき励磁される。 In the distribution board circuit 50a, the AC / DC power supply device 53 converts the power from the AC uninterruptible power supply 4 from AC to DC to be a DC undervoltage detection circuit power source, and the undervoltage relay 54a is an MCCB2 switch 52a. The control power supply 3 is taken in from the load side and voltage level monitoring is performed. When the voltage of the control power supply 3 becomes lower than the set voltage of the undervoltage relay 54a, the internal contact is closed. The auxiliary relay 80X1 55a is excited when the internal contact of the undervoltage relay 54a is closed and the MCCB2 auxiliary contact 56a is closed when the MCCB2 switch 52a is turned on.
　また、分電盤回路５０ｂにおいても、補助リレー８０Ｘ２　５５ｂは、不足電圧リレー５４ｂの内部接点が閉でかつＭＣＣＢ３スイッチ５２ｂ入でＭＣＣＢ３補助接点５６ｂが閉のとき励磁される。 Also in the distribution board circuit 50b, the auxiliary relay 80X2 55b is energized when the internal contact of the undervoltage relay 54b is closed and the MCCB3 auxiliary contact 56b is closed when the MCCB3 switch 52b is turned on.
　さらに、８０Ｘ１接点５７ａと８０Ｘ２接点５７ｂのＯＲ条件で補助リレー８０Ｘ３　５５ｃのコイルが励磁される。 Furthermore, the coil of the auxiliary relay 80X3 55c is excited under the OR condition of the 80X1 contact 57a and the 80X2 contact 57b.
　次に、図７に示す装置Ａ２の作用について説明する。
　装置Ａ２における補助リレー８０Ｘ３のノーマルクローズ接点６６ａは、上述した補助リレー８０Ｘ３　５５ｃコイルが励磁すると開き、電源異常検出ラッチ回路６７ａをロックする。このため、電源異常検出ラッチ回路６７ａが動作せず、制御モードロック及び警報が誤発報されることがない。 Next, the operation of the device A2 shown in FIG. 7 will be described.
The normally closed contact 66a of the auxiliary relay 80X3 in the device A2 opens when the above-described auxiliary relay 80X3 55c coil is excited and locks the power supply abnormality detection latch circuit 67a. For this reason, the power supply abnormality detection latch circuit 67a does not operate, and the control mode lock and the alarm are not erroneously issued.
　また、装置Ｂ２～Ｄ２においても、補助リレー８０Ｘ３の各ノーマルクローズ接点６６ｂ、６６ｃ、６６ｄは、上述した８０Ｘ３　５５ｃコイルが励磁すると開き、それぞれ電源異常検出ラッチ回路６７ｂ、６７ｃ、６７ｄをロックする。このため、電源異常検出ラッチ回路６７ｂ、６７ｃ、６７ｄが動作せず、制御モードロック及び警報が誤発報されることがない。 Also in the devices B2 to D2, the normally closed contacts 66b, 66c, 66d of the auxiliary relay 80X3 are opened when the above-described 80X3 55c coil is excited, and lock the power supply abnormality detection latch circuits 67b, 67c, 67d, respectively. For this reason, the power supply abnormality detection latch circuits 67b, 67c, 67d do not operate, and the control mode lock and the alarm are not erroneously issued.
（効果）
　以上説明したように、本実施形態では、装置Ａ２～Ｄ２の電源異常検出ラッチ回路６７ａ、６７ｂ、６７ｃ、６７ｄを同時にロックできるため、ＤＣ分電盤ＭＣＣＢ１スイッチ５１による装置Ａ２～Ｄ２への制御電源３の一括投入時、または不慮の電圧低下後の電源復電時に装置動作統一が図れ、正誤確認作業は不要となる。 (effect)
As described above, in this embodiment, since the power supply abnormality detection latch circuits 67a, 67b, 67c, 67d of the devices A2 to D2 can be locked simultaneously, the control power supply to the devices A2 to D2 by the DC distribution board MCCB1 switch 51 is possible. The unit operation can be unified when the power supply 3 is turned on all the time or when the power is restored after an unexpected voltage drop.
［第４の実施形態］
（構成）
　本発明の第４の実施形態に係る電気所保護制御システム８０は、図８に示すＤＣ分電盤７０と、図１２に示す４つの装置Ａ５～Ｄ５とで構成される。 [Fourth Embodiment]
(Constitution)
The electric station protection control system 80 according to the fourth embodiment of the present invention includes a DC distribution board 70 shown in FIG. 8 and four devices A5 to D5 shown in FIG.
　ＤＣ分電盤７０は、装置Ａ５及び装置Ｂ５を対象とする分電盤回路７０ａと、装置Ｃ５及び装置Ｄ５を対象とする分電盤回路７０ｂからなっている。分電盤回路７０ａは、ＡＣ無停電電源４から電源の供給を受けるＡＣ／ＤＣ電源装置７３と、設定電圧以下になると接点が閉じる不足電圧リレー７４ａと、接点が閉じるとコイルが励磁される電磁接触器Ｙ１　７５ａと、電磁接触器Ｙ１　７５ａのノーマルクローズＹ１接点７６ａとで構成される。電磁接触器Ｙ１　７５ａのノーマルクローズＹ１接点７６ａは、コイルが励磁すると開き、装置Ａ５及び装置Ｂ５への電源供給を遮断する。 The DC distribution board 70 includes a distribution board circuit 70a for the devices A5 and B5 and a distribution board circuit 70b for the devices C5 and D5. The distribution board circuit 70a includes an AC / DC power supply device 73 that receives power from the AC uninterruptible power supply 4, an undervoltage relay 74a that closes when the voltage falls below a set voltage, and an electromagnetic that excites a coil when the contact closes. It comprises a contactor Y1 75a and a normally closed Y1 contact 76a of the electromagnetic contactor Y1 75a. The normally closed Y1 contact 76a of the electromagnetic contactor Y1 75a opens when the coil is excited, and interrupts the power supply to the devices A5 and B5.
　また、分電盤回路７０ｂは、分電盤回路７０ａのＡＣ／ＤＣ電源装置７３から分岐して接続されるとともに設定電圧以下になると接点が閉じる不足電圧リレー７４ｂと、接点が閉じるとコイルが励磁される電磁接触器Ｙ２　７５ｂと、電磁接触器Ｙ２　７５ｂのノーマルクローズＹ２接点７６ｂとで構成される。電磁接触器Ｙ２　７５ｂのノーマルクローズＹ２接点７６ｂは、コイルが励磁すると開き、装置Ｃ５及び装置Ｄ５への電源供給を遮断する。 The distribution board circuit 70b is branched and connected from the AC / DC power supply device 73 of the distribution board circuit 70a, and the undervoltage relay 74b that closes the contact when the voltage is lower than the set voltage, and the coil is excited when the contact is closed. The electromagnetic contactor Y2 75b and the normally closed Y2 contact 76b of the electromagnetic contactor Y2 75b are configured. The normally closed Y2 contact 76b of the electromagnetic contactor Y2 75b opens when the coil is excited, and interrupts the power supply to the devices C5 and D5.
　また、図８に示すＤＣ分電盤７０では、電源分割用のＭＣＣＢ２スイッチ７２ａの負荷側に装置Ａ５及びＢ５が接続される一方、ＭＣＣＢ３スイッチ７２ｂの負荷側に装置Ｃ５及びＤ５が接続されている。なお、不足電圧リレー７４ａ、７４ｂの動作電圧は任意に設定ができる。 In the DC distribution board 70 shown in FIG. 8, the devices A5 and B5 are connected to the load side of the MCCB2 switch 72a for power supply division, while the devices C5 and D5 are connected to the load side of the MCCB3 switch 72b. . The operating voltage of the undervoltage relays 74a and 74b can be set arbitrarily.
（作用）
　次に、図８のＤＣ分電盤７０の各部の作用について説明する。 (Function)
Next, the operation of each part of the DC distribution board 70 in FIG. 8 will be described.
　制御電源３は、ＭＣＣＢ１スイッチ７１を介してＭＣＣＢ２スイッチ７２ａとＭＣＣＢ３スイッチ７２ｂにて電源分割される。ＭＣＣＢ２スイッチ７２ａは、装置Ａ２と装置Ｂ２に対して制御電源３を一括で開閉する。他方、ＭＣＣＢ３スイッチ７２ｂは、装置Ｃ２と装置Ｄ２に対して制御電源３を一括で開閉する。 The control power supply 3 is divided by the MCCB2 switch 72a and the MCCB3 switch 72b via the MCCB1 switch 71. The MCCB2 switch 72a collectively opens and closes the control power supply 3 for the devices A2 and B2. On the other hand, the MCCB3 switch 72b collectively opens and closes the control power supply 3 for the devices C2 and D2.
　分電盤回路７０ａにおいて、ＡＣ／ＤＣ電源装置７３は、ＡＣ無停電電源４からの電源をＡＣからＤＣに変換し、ＤＣ不足電圧検出回路用電源とする。不足電圧リレー７４ａは、電源分割ＭＣＣＢ２スイッチ７２ａの電源側から制御電源３を取り込み、電圧レベル監視を行う。制御電源３の電圧が不足電圧リレー７４の設定電圧以下となると内部接点が閉じる。電磁接触器Ｙ１　７５ａでは、前記接点が閉じるとコイルが励磁される。 In the distribution board circuit 70a, the AC / DC power supply device 73 converts the power from the AC uninterruptible power supply 4 from AC to DC and uses it as the power supply for the DC undervoltage detection circuit. The undervoltage relay 74a takes in the control power supply 3 from the power supply side of the power supply division MCCB2 switch 72a and performs voltage level monitoring. When the voltage of the control power supply 3 becomes lower than the set voltage of the undervoltage relay 74, the internal contact is closed. In the magnetic contactor Y1 75a, the coil is excited when the contact is closed.
　また、分電盤回路７０ｂにおいても、不足電圧リレー７４ｂは、ＭＣＣＢ３スイッチ７２ｂの負荷側から制御電源３を取り込み電圧レベル監視を行う。制御電源３の電圧が不足電圧リレー７４ｂの設定電圧以下となると内部接点が閉じる。電磁接触器Ｙ２　７５ｂでは、前記接点が閉じるとコイルが励磁される。 Also in the distribution board circuit 70b, the undervoltage relay 74b takes in the control power supply 3 from the load side of the MCCB3 switch 72b and monitors the voltage level. When the voltage of the control power supply 3 becomes lower than the set voltage of the undervoltage relay 74b, the internal contact is closed. In the electromagnetic contactor Y2 75b, the coil is excited when the contact is closed.
　電磁接触器Ｙ１　７５ａのノーマルクローズＹ１接点７６ａは、コイルが励磁すると開き、装置Ａ５及び装置Ｂ５への電源供給を遮断する。同じく、電磁接触器Ｙ２　７５ｂのノーマルクローズＹ２接点７６ｂは、コイルが励磁すると開き、装置Ｃ５及びＤ５への電源供給を遮断する。 The normally closed Y1 contact 76a of the electromagnetic contactor Y1 75a opens when the coil is excited and cuts off the power supply to the devices A5 and B5. Similarly, the normally closed Y2 contact 76b of the electromagnetic contactor Y2 75b opens when the coil is excited, and interrupts the power supply to the devices C5 and D5.
（効果）
　以上説明したように、本実施形態では、ＭＣＣＢ２スイッチ７２ａ負荷側電圧を分電盤回路７０ａの不足電圧リレー７４ａで集中監視し、任意の設定電圧以下では、装置Ａ５及び装置Ｂ５への供給電源を遮断するため、ＤＣ分電盤ＭＣＣＢ２スイッチ７２ａによる装置Ａ５及び装置Ｂ５への一括投入時、または電圧低下後の電源復電時の動作統一が図れ、正誤確認作業は不要となる。 (effect)
As described above, in this embodiment, the MCCB2 switch 72a load side voltage is centrally monitored by the undervoltage relay 74a of the distribution board circuit 70a, and the power supply to the devices A5 and B5 is switched below an arbitrary set voltage. Since the power is cut off, the DC distribution board MCCB2 switch 72a can unify the operations when the devices A5 and B5 are turned on collectively or when the power is restored after the voltage drop, and the correctness check operation is not required.
　また、ＭＣＣＢ３スイッチ７２ｂ負荷側電圧を分電盤回路７０ｂの不足電圧リレー７４ｂで集中監視し、任意の設定電圧以下では、装置Ｃ５及び装置Ｄ５への供給電源を遮断するため、ＤＣ分電盤ＭＣＣＢ３スイッチ７２ｂによる装置Ｃ５及び装置Ｄ５への一括投入時、または電圧低下後の電源復電時の動作統一が図れ、正誤確認作業は不要となる。 Further, the MCCB3 switch 72b load side voltage is centrally monitored by the undervoltage relay 74b of the distribution board circuit 70b, and the DC power distribution board MCCB3 is used to cut off the power supply to the devices C5 and D5 below an arbitrary set voltage. The operation can be unified when the switch 72b is turned on to the device C5 and the device D5 at once or when the power is restored after the voltage drop, and the correctness check operation is not required.
［第５の実施形態］
　本実施形態では、第１の実施形態において、電源分割２重化回路に適用した例を示す。 [Fifth Embodiment]
In this embodiment, an example in which the power supply division duplex circuit is applied in the first embodiment is shown.
（構成）
　本発明の第５の実施形態に係る電気所保護制御システム１００は、図９に示すＤＣ分電盤９０と、図１０に示す４つの装置Ａ３～Ｄ３とで構成される。 (Constitution)
The electric station protection control system 100 according to the fifth embodiment of the present invention includes a DC distribution board 90 shown in FIG. 9 and four devices A3 to D3 shown in FIG.
　まず、図９において、電源は、制御電源５と制御電源６とで電源２重化されている。また、ＤＣ分電盤９０では、制御電源５受電用ＭＣＣＢ１スイッチ９１ａを介して分電盤回路９０ａと接続され、他方、制御電源６受電用ＭＣＣＢ２スイッチ９１ｂを介して分電盤回路９０ｂと接続される。 First, in FIG. 9, the power source is duplicated by the control power source 5 and the control power source 6. Further, the DC distribution board 90 is connected to the distribution board circuit 90a via the control power supply 5 receiving MCCB1 switch 91a, and is connected to the distribution board circuit 90b via the control power supply 6 receiving MCCB2 switch 91b. The
　分電盤回路９０ａは、ＡＣ無停電電源２から電源の供給を受けるＡＣ／ＤＣ電源装置９４と、設定電圧以下になると接点が閉じる不足電圧リレー９５ａと、接点が閉じるとコイルが励磁される補助リレー８０Ｘ１　９６ａと、を有している。さらに、分電盤回路９０ｂは、分電盤回路９０ａのＡＣ／ＤＣ電源装置９４から分岐して接続されるとともに設定電圧以下になると接点が閉じる不足電圧リレー９５ｂと、接点が閉じるとコイルが励磁される補助リレー８０Ｘ２　９６ｂと、を有している。なお、不足電圧リレー９５ａ，９５ｂの動作電圧は任意に設定ができる。 The distribution board circuit 90a includes an AC / DC power supply 94 that receives power from the AC uninterruptible power supply 2, an undervoltage relay 95a that closes a contact when the voltage falls below a set voltage, and an auxiliary that excites a coil when the contact closes. Relay 80X1 96a. Further, the distribution board circuit 90b is branched and connected from the AC / DC power supply device 94 of the distribution board circuit 90a, and the undervoltage relay 95b whose contact is closed when the voltage is lower than the set voltage, and the coil is excited when the contact is closed. Auxiliary relay 80X2 96b. The operating voltage of the undervoltage relays 95a and 95b can be set arbitrarily.
　また、ＤＣ分電盤９０は、励磁されていない通常の状態でＯＮ、ＯＦＦされる従来の補助リレー８０Ａ　９３ａ、補助リレー８０Ｂ　９３ｂと、８０Ａ　接点９７ａ、８０Ｂ　接点９７ｂと、ＡまたはＢのいずれかを優先して選択する優先選択ＳＷ９８ａ、優先選択ＳＷ９８ｂと、キープリレー８８Ｏ／８８Ｒ　９９とを備え、各々切り替え機能を有している。 Also, the DC distribution board 90 is a conventional auxiliary relay 80A 93a, auxiliary relay 80B 93b, 80A contact 97a, 80B contact 97b, and either A or B, which is turned on and off in a normal state where it is not excited. Are provided with priority selection SW 98a, priority selection SW 98b, and keep relay 88O / 88R 99, each of which has a switching function.
　また、図９に示すＤＣ分電盤９０では、電源分割用のＭＣＣＢ３スイッチ９２ａ、ＭＣＣＢ４スイッチ９２ｂ、ＭＣＣＢ５スイッチ９２ｃ、ＭＣＣＢ６スイッチ９２ｄの負荷側に、それぞれ、装置Ａ３、装置Ｂ３、装置Ｃ３、装置Ｄ３が接続されている。 Further, in the DC distribution board 90 shown in FIG. 9, devices A3, B3, C3, and D3 are provided on the load side of the MCCB3 switch 92a, MCCB4 switch 92b, MCCB5 switch 92c, and MCCB6 switch 92d for power supply division, respectively. Is connected.
　次に、図１０に示す装置Ａ３は、制御電源を降圧するＤＣ／ＤＣ電源装置１０１ａと、各部の制御を行う制御ユニット１０２ａと、電源の異常を検出するとラッチを行う電源異常検出ラッチ回路１０６ａと、制御ユニット１０２ａ及び電源異常検出ラッチ回路１０６ａを接続する補助リレー８０Ｘ１及び補助リレー８０Ｘ２と、を備えている。補助リレー８０Ｘ１と補助リレー８０Ｘ２とは互いに並列に配置されており、ぞれぞれ、コイルが励磁すると開き、電源異常検出ラッチ回路１０６ａをロックするノーマルクローズ接点１０４ａ、１０５ａを有している。また、制御ユニット１０２ａは、電源異常検出部１０３ａを実装している。 Next, a device A3 shown in FIG. 10 includes a DC / DC power supply device 101a that steps down the control power supply, a control unit 102a that controls each unit, a power supply abnormality detection latch circuit 106a that performs latching when a power supply abnormality is detected, The auxiliary relay 80X1 and the auxiliary relay 80X2 that connect the control unit 102a and the power supply abnormality detection latch circuit 106a are provided. The auxiliary relay 80X1 and the auxiliary relay 80X2 are arranged in parallel with each other, and each has normal close contacts 104a and 105a that open when the coil is excited and lock the power supply abnormality detection latch circuit 106a. The control unit 102a is equipped with a power supply abnormality detection unit 103a.
　装置Ｂ３、装置Ｃ３、装置Ｄ３も、装置Ａ３と同様に、それぞれ、ＤＣ／ＤＣ電源装置１０１ｂ、１０１ｃ、１０１ｄと、制御ユニット１０２ｂ、１０２ｃ、１０２ｄと、制御ユニット１０２ｂ、１０２ｃ、１０２ｄに実装された電源異常検出部１０３ｂ、１０３ｃ、１０３ｄと、ノーマルクローズ接点１０４ｂ、１０４ｃ、１０４ｄを有する補助リレー８０Ｘ１と、ノーマルクローズ接点１０５ｂ、１０５ｃ、１０５ｄを有する補助リレー８０Ｘ２と、電源異常検出ラッチ回路１０６ｂ、１０６ｃ、１０６ｄと、を備えている。 Similarly to the device A3, the device B3, the device C3, and the device D3 are mounted on the DC / DC power supply devices 101b, 101c, and 101d, the control units 102b, 102c, and 102d, and the control units 102b, 102c, and 102d, respectively. Power supply abnormality detection units 103b, 103c, 103d, auxiliary relay 80X1 having normally closed contacts 104b, 104c, 104d, auxiliary relay 80X2 having normally closed contacts 105b, 105c, 105d, power supply abnormality detection latch circuits 106b, 106c, 106d.
（作用）
　まず、図９に示すＤＣ分電盤９０の各部の作用を説明する。 (Function)
First, the operation of each part of the DC distribution board 90 shown in FIG. 9 will be described.
　分電盤回路９０ａにおいて、ＡＣ／ＤＣ電源装置９４は、ＡＣ無停電電源２からの電源をＡＣからＤＣに変換してＤＣ不足電圧検出回路用電源とする。不足電圧リレー９５ａは、制御電源５受電用ＭＣＣＢ１スイッチ９１ａの負荷側から制御電源５を取り込み電圧レベル監視を行う。制御電源５の電圧が不足電圧リレー９５ａの設定電圧以下となると内部接点が閉じる。補助リレー８０Ｘ１　９６ａは、前記接点が閉じるとコイルが励磁される。 In the distribution board circuit 90a, the AC / DC power supply device 94 converts the power from the AC uninterruptible power supply 2 from AC to DC to be used as a DC undervoltage detection circuit power supply. The undervoltage relay 95a takes in the control power supply 5 from the load side of the MCCB1 switch 91a for receiving the control power supply 5 and monitors the voltage level. When the voltage of the control power supply 5 becomes lower than the set voltage of the undervoltage relay 95a, the internal contact is closed. In the auxiliary relay 80X1 96a, the coil is excited when the contact is closed.
　また、分電盤回路９０ｂにおいて、不足電圧リレー９５ｂは、制御電源６受電用ＭＣＣＢ２スイッチ９１ｂの負荷側から制御電源６を取り込み電圧レベル監視を行う。制御電源６の電圧が不足電圧リレー９５ｂの設定電圧以下となると内部接点が閉じる。補助リレー８０Ｘ２　９６ｂは、前記接点が閉じるとコイルが励磁される。 In the distribution board circuit 90b, the undervoltage relay 95b takes in the control power supply 6 from the load side of the MCCB2 switch 91b for receiving the control power supply 6 and monitors the voltage level. When the voltage of the control power supply 6 becomes lower than the set voltage of the undervoltage relay 95b, the internal contact is closed. In the auxiliary relay 80X2 96b, the coil is excited when the contact is closed.
　次に、図１０に示す装置Ａ３の作用について説明する。
　装置Ａ３における補助リレー８０Ｘ１のノーマルクローズ接点１０４ａと補助リレー８０Ｘ２のノーマルクローズ接点１０５ａは、前記コイルが励磁すると開く。両方の接点が開のとき電源異常検出ラッチ回路１０６ａをロックする。このため、電源異常検出ラッチ回路１０６ａが動作せず、制御モードロック及び警報が誤発報されることがない。 Next, the operation of the device A3 shown in FIG. 10 will be described.
In the device A3, the normally closed contact 104a of the auxiliary relay 80X1 and the normally closed contact 105a of the auxiliary relay 80X2 are opened when the coil is excited. When both contacts are open, the power supply abnormality detection latch circuit 106a is locked. For this reason, the power supply abnormality detection latch circuit 106a does not operate, and the control mode lock and the alarm are not erroneously issued.
　また、装置Ｂ３～Ｄ３においても、補助リレー８０Ｘ１のノーマルクローズ接点１０４ｂ、１０４ｃ、１０４ｄと補助リレー８０Ｘ２のノーマルクローズ接点１０５ｂ、１０５ｃ、１０５ｄは、コイルが励磁すると開く。両方の接点が開のとき、それぞれ電源異常検出ラッチ回路１０６ｂ、１０６ｃ、１０６ｄをロックする。このため、電源異常検出ラッチ回路１０６ｂ、１０６ｃ、１０６ｄが動作せず、制御モードロック及び警報が誤発報されることがない。 Also in the devices B3 to D3, the normally closed contacts 104b, 104c, 104d of the auxiliary relay 80X1 and the normally closed contacts 105b, 105c, 105d of the auxiliary relay 80X2 are opened when the coil is excited. When both contacts are open, the power supply abnormality detection latch circuits 106b, 106c, and 106d are locked, respectively. For this reason, the power supply abnormality detection latch circuits 106b, 106c, and 106d do not operate, and the control mode lock and the alarm are not erroneously issued.
（効果）
　以上説明したように、本実施形態では、装置Ａ３～Ｄ３制御電源電圧をＤＣ分電盤９０にて集中監視し、任意の設定電圧以下では、装置Ａ３～Ｄ３の電源異常検出ラッチ回路１０６ａ、１０６ｂ、１０６ｃ、１０６ｄをロックできるため、ＭＣＣＢ１スイッチ９１ａ、ＭＣＣＢ２スイッチ９１ｂによる制御電源５，６の一括投入時、または不慮の電圧低下後の電源復電時の動作統一が図れ、正誤確認作業は不要となる。 (effect)
As described above, in the present embodiment, the control power supply voltages of the devices A3 to D3 are centrally monitored by the DC distribution board 90, and the power supply abnormality detection latch circuits 106a and 106b of the devices A3 to D3 are below an arbitrary set voltage. , 106c and 106d can be locked, so that the operation can be unified when the control power supplies 5 and 6 are turned on collectively by the MCCB1 switch 91a and the MCCB2 switch 91b, or when the power supply is restored after an unexpected voltage drop. Become.
[他の実施形態]
（１）上記各実施形態において、各装置に、不足電圧リレーによる制御モードロック及び警報ロック中であることを知らせる表示器を設置することもできる。 [Other embodiments]
(1) In each of the above-described embodiments, each device can be provided with an indicator for notifying that the control mode lock and alarm lock by the undervoltage relay are in progress.
（２）上記各実施形態においては、装置数をＡ～Ｄの４つとしたが、装置の個数は任意の数とすることができる。 (2) In each of the above embodiments, the number of devices is four from A to D, but the number of devices can be any number.
（３）補助リレー８０Ｘ　１５を用いた第１の実施形態と、電磁接触器（Ｙ）３５を用いた第２の実施形態を組み合わせた構成とすることもできる。 (3) A configuration in which the first embodiment using the auxiliary relay 80X15 and the second embodiment using the electromagnetic contactor (Y) 35 may be combined.
（４）以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、請求の範囲に記載された発明とその均等の範囲に含まれるものである。 (4) Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.
１、３、５、６…制御電源
２、４…ＡＣ無停電電源
１０、３０、５０、７０、９０…ＤＣ分電盤
１１、３１、５１、７１…ＭＣＣＢ１スイッチ
１２ａ、３２ａ、５２ａ、７２ａ…ＭＣＣＢ２スイッチ
１２ｂ、３２ｂ、５２ｂ、７２ｂ…ＭＣＣＢ３スイッチ
１２ｃ、３２ｃ…ＭＣＣＢ４スイッチ
１２ｄ、３２ｄ…ＭＣＣＢ５スイッチ
１３、３３、５３、７３、９４…ＡＣ／ＤＣ電源装置
１４、３４…不足電圧リレー
１５…補助リレー　８０Ｘ
２０、４０、６０、８０、１００…電気所保護制御システム
２１ａ、２１ｂ、２１ｃ、２１ｄ…ＤＣ／ＤＣ電源装置
２２ａ、２２ｂ、２２ｃ、２２ｄ…制御ユニット
２３ａ、２３ｂ、２３ｃ、２３ｄ…電源異常検出部
２４ａ、２４ｂ、２４ｃ、２４ｄ…ノーマルクローズ接点
２５ａ、２５ｂ、２５ｃ、２５ｄ…電源異常検出ラッチ回路
３５…電磁接触器（Ｙ）
３６…ノーマルクローズＹ接点
５０ａ、５０ｂ…分電盤回路
５４ａ、５４ｂ…不足電圧リレー
５５ａ…補助リレー　８０Ｘ１
５５ｂ…補助リレー　８０Ｘ２
５５ｃ…補助リレー　８０Ｘ３
５６ａ…ＭＣＣＢ２補助接点
５６ｂ…ＭＣＣＢ３補助接点
５７ａ…８０Ｘ１接点
５７ｂ…８０Ｘ２接点
６３ａ、６３ｂ、６３ｃ、６３ｄ…ＤＣ／ＤＣ電源装置
６４ａ、６４ｂ、６４ｃ、６４ｄ…制御ユニット
６５ａ、６５ｂ、６５ｃ、６５ｄ…電源異常検出部
６６ａ、６６ｂ、６６ｃ、６６ｄ…ノーマルクローズ接点
６７ａ、６７ｂ、６７ｃ、６７ｄ…電源異常検出ラッチ回路
７４ａ、７４ｂ…不足電圧リレー
７５ａ…電磁接触器　Ｙ１
７５ｂ…電磁接触器　Ｙ２
７６ａ…ノーマルクローズＹ１接点
７６ｂ…ノーマルクローズＹ２接点
９１ａ…ＭＣＣＢ１スイッチ
９１ｂ…ＭＣＣＢ２スイッチ
９２ａ…ＭＣＣＢ３スイッチ
９２ｂ…ＭＣＣＢ４スイッチ
９２ｃ…ＭＣＣＢ５スイッチ
９２ｄ…ＭＣＣＢ６スイッチ
９３ａ…補助リレー　８０Ａ
９３ｂ…補助リレー　８０Ｂ
９５ａ、９５ｂ…不足電圧リレー
９６ａ…補助リレー　８０Ｘ１
９６ｂ…補助リレー　８０Ｘ２
９７ａ…８０Ａ接点
９７ｂ…８０Ｂ接点
９８ａ、９８ｂ…優先選択ＳＷ
９９…キープリレー８８Ｏ／８８Ｒ
１０１ａ、１０１ｂ、１０１ｃ、１０１ｄ…ＤＣ／ＤＣ電源装置
１０２ａ、１０２ｂ、１０２ｃ、１０２ｄ…制御ユニット
１０３ａ、１０３ｂ、１０３ｃ、１０３ｄ…電源異常検出部
１０４ａ、１０４ｂ、１０４ｃ、１０４ｄ…ノーマルクローズ接点
１０５、１０５ｂ、１０５ｃ、１０５ｄ…ノーマルクローズ接点
１０６ａ、１０６ｂ、１０６ｃ、１０６ｄ…電源異常検出ラッチ回路 DESCRIPTION OF SYMBOLS 1, 3, 5, 6 ... Control power supply 2, 4 ... AC uninterruptible power supply 10, 30, 50, 70, 90 ... DC distribution board 11, 31, 51, 71 ... MCCB1 switch 12a, 32a, 52a, 72a ... MCCB2 switches 12b, 32b, 52b, 72b ... MCCB3 switch 12c, 32c ... MCCB4 switch 12d, 32d ... MCCB5 switches 13, 33, 53, 73, 94 ... AC / DC power supply 14, 34 ... undervoltage relay 15 ... auxiliary relay 80X
20, 40, 60, 80, 100 ... electric station protection control systems 21a, 21b, 21c, 21d ... DC / DC power supply devices 22a, 22b, 22c, 22d ... control units 23a, 23b, 23c, 23d ... power supply abnormality detection unit 24a, 24b, 24c, 24d ... Normally closed contacts 25a, 25b, 25c, 25d ... Power failure detection latch circuit 35 ... Electromagnetic contactor (Y)
36 ... Normally closed Y contacts 50a, 50b ... Distribution board circuits 54a, 54b ... Undervoltage relay 55a ... Auxiliary relay 80X1
55b ... Auxiliary relay 80X2
55c ... Auxiliary relay 80X3
56a ... MCCB2 auxiliary contact 56b ... MCCB3 auxiliary contact 57a ... 80X1 contact 57b ... 80X2 contacts 63a, 63b, 63c, 63d ... DC / DC power supply devices 64a, 64b, 64c, 64d ... control units 65a, 65b, 65c, 65d ... power supply Abnormality detection parts 66a, 66b, 66c, 66d ... Normally closed contacts 67a, 67b, 67c, 67d ... Power supply abnormality detection latch circuits 74a, 74b ... Undervoltage relay 75a ... Electromagnetic contactor Y1
75b ... Electromagnetic contactor Y2
76a ... Normally closed Y1 contact 76b ... Normally closed Y2 contact 91a ... MCCB1 switch 91b ... MCCB2 switch 92a ... MCCB3 switch 92b ... MCCB4 switch 92c ... MCCB5 switch 92d ... MCCB6 switch 93a ... Auxiliary relay 80A
93b ... Auxiliary relay 80B
95a, 95b ... Undervoltage relay 96a ... Auxiliary relay 80X1
96b ... Auxiliary relay 80X2
97a ... 80A contact 97b ... 80B contact 98a, 98b ... Priority selection SW
99 ... Keep Relay 88O / 88R
101a, 101b, 101c, 101d ... DC / DC power supply devices 102a, 102b, 102c, 102d ... Control units 103a, 103b, 103c, 103d ... Power supply abnormality detectors 104a, 104b, 104c, 104d ... Normally closed contacts 105, 105b, 105c, 105d ... normally closed contacts 106a, 106b, 106c, 106d ... power supply abnormality detection latch circuit

Claims (7)

  1. 　制御電源の電源分割を行うとともに、複数の装置に対して電源供給を行う保護制御用分電盤であって、
    　無停電電源から電源の供給を受ける電源装置と、
    　前記電源装置によって駆動し、前記制御電源が設定電圧以下になると接点が閉じる不足電圧リレーと、
    　前記接点が閉じるとコイルが励磁されることにより、前記複数の装置内の回路の動作を抑制する抑制手段と、
    　を備える保護制御用分電盤。     A distribution board for protection control that performs power supply division of the control power supply and supplies power to a plurality of devices,
    A power supply that receives power from an uninterruptible power supply;
    An undervoltage relay that is driven by the power supply and closes when the control power supply is below a set voltage;
    When the contact is closed, the coil is excited to suppress the operation of the circuits in the plurality of devices,
    A distribution board for protection control.
  2. 　前記抑制手段は、前記接点が閉じるとコイルが励磁されることにより、前記複数の装置に設けられた電源異常検出ラッチ回路の接点を開ける補助リレーである請求項１記載の保護制御用分電盤。 2. The protective control distribution board according to claim 1, wherein the suppression means is an auxiliary relay that opens a contact of a power supply abnormality detection latch circuit provided in the plurality of devices by exciting a coil when the contact is closed. .
  3. 　前記補助リレーの接点を複数設け、当該複数の接点のいずれかが閉じたときに前記補助リレーが動作し、前記複数の装置に設けられた電源異常検出ラッチ回路の接点を開ける請求項２記載の保護制御用分電盤。 3. The contact of the power supply abnormality detection latch circuit provided in the plurality of devices is opened by providing a plurality of contacts of the auxiliary relay, and the auxiliary relay operates when any of the plurality of contacts is closed. Distribution board for protection control.
  4. 　前記制御電源を複数設けて多重化し、当該複数の制御電源の負荷側にそれぞれ前記電源装置、前記不足電圧リレー及び前記補助リレーを設けた請求項２記載の保護制御用分電盤。 The protection control distribution board according to claim 2, wherein a plurality of the control power supplies are provided and multiplexed, and the power supply device, the undervoltage relay, and the auxiliary relay are provided on the load side of the plurality of control power supplies, respectively.
  5. 　前記抑制手段は、前記接点が閉じるとコイルが励磁されることにより、前記複数の装置への供給電源を遮断する電磁接触器である請求項１記載の保護制御用分電盤。 2. The protective control distribution board according to claim 1, wherein the suppression means is an electromagnetic contactor that cuts off a power supply to the plurality of devices by exciting a coil when the contact is closed.
  6. 　前記電源装置、前記不足電圧リレー及び前記電磁接触器を複数設け、前記各電磁接触器は前記複数の装置の一部の供給電源を遮断する請求項５記載の保護制御用分電盤。 6. The distribution board for protection control according to claim 5, wherein a plurality of the power supply devices, the undervoltage relays, and the electromagnetic contactors are provided, and each of the electromagnetic contactors shuts off a part of the power supply of the plurality of devices.
  7. 　制御電源の電源分割を行うとともに、複数の装置に対して電源供給を行う保護制御用分電盤及び当該分電盤と接続された複数の装置を有する電気所保護制御システムであって、
    　前記保護制御用分電盤は、無停電電源から電源の供給を受ける電源装置と、前記電源装置によって駆動し、前記制御電源が設定電圧以下になると接点が閉じる不足電圧リレーと、前記接点が閉じるとコイルが励磁されることにより、前記複数の装置内の回路の動作を抑制する抑制手段と、を備え、
    　前記装置は、制御電源を降圧するＤＣ電源装置と、前記制御電源の電源の異常を検出する電源異常検出部と、該電源異常検出部により電源の異常を検出するとラッチを行う電源異常検出ラッチ回路と、前記電源異常検出部及び前記電源異常検出ラッチ回路を接続するとともに、前記抑制手段における前記コイルが励磁されると開き、前記電源異常検出ラッチ回路をロックするノーマルクローズ接点を有する補助リレーと、
    　を備える電気所保護制御システム。     An electrical site protection control system having a power distribution for a control power source and a power distribution board for protection control that supplies power to a plurality of devices and a plurality of devices connected to the power distribution board,
    The protective control distribution board includes a power supply that receives power from an uninterruptible power supply, an undervoltage relay that is driven by the power supply and closes when the control power is lower than a set voltage, and the contact is closed. And suppression means for suppressing the operation of the circuits in the plurality of devices by exciting the coil,
    The apparatus includes a DC power supply device for stepping down a control power supply, a power supply abnormality detection unit that detects a power supply abnormality of the control power supply, and a power supply abnormality detection latch circuit that latches when a power supply abnormality is detected by the power supply abnormality detection unit And connecting the power supply abnormality detection unit and the power supply abnormality detection latch circuit, an auxiliary relay having a normally closed contact that opens when the coil in the suppression means is excited and locks the power supply abnormality detection latch circuit,
    Electrical station protection control system comprising.
PCT/JP2014/050185 2013-03-13 2014-01-09 Distribution board for protection control, and protection control system for electric power station WO2014141727A1 (en)

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JPH0289452A (en) * 1988-09-27 1990-03-29 Matsushita Electric Works Ltd Telephone controller
JP2002027659A (en) * 2000-07-04 2002-01-25 Fujitsu Ltd Misoperation preventing circuit for power supply control system
JP2009152693A (en) * 2007-12-18 2009-07-09 Mitsumi Electric Co Ltd Initializing circuit and protection detection circuit having the same
JP2013048556A (en) * 2012-12-03 2013-03-07 Panasonic Corp Electricity distribution system

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Publication number Priority date Publication date Assignee Title
JPH0289452A (en) * 1988-09-27 1990-03-29 Matsushita Electric Works Ltd Telephone controller
JP2002027659A (en) * 2000-07-04 2002-01-25 Fujitsu Ltd Misoperation preventing circuit for power supply control system
JP2009152693A (en) * 2007-12-18 2009-07-09 Mitsumi Electric Co Ltd Initializing circuit and protection detection circuit having the same
JP2013048556A (en) * 2012-12-03 2013-03-07 Panasonic Corp Electricity distribution system

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