JP4715376B2 - Malfunction prevention device for section switch - Google Patents

Description

  The present invention relates to a malfunction prevention device for a section switch in an uninterruptible switching device between different power sources.

When performing power outage work, etc. in a section of the commercial distribution line, a power generator for movement is installed to supply power to the load after the power outage work section, and the mobile power supply vehicle side is uninterrupted from the commercial power source side. The power is switched and supplied to the load side.
At the time of switching, when the voltage difference, frequency difference, and phase difference between the commercial power supply and the mobile power generation device are within the specified error range, the mobile circuit breaker on the mobile power generation device side is turned on synchronously, and the section is opened and closed. The vessel is opened manually. Therefore, it is desired to lock the segment switch during asynchronous or power outage work.

  As what locks a segment switch, the thing like patent document 1 is well-known.

In this patent document, as a locking device for a construction switch, the switching lever of the construction switch and the restraining lever of the locking device are connected, and the movement of the restraining lever is always restrained so that the substation can be moved. It is described that only when the power supply of the power generation apparatus is synchronized, the restraint lever is released and the open / close lever can be operated.
JP 11-86686 A

  The construction switch is installed in parallel with the edge section connecting the construction section and the load relief side, and the power phase, voltage value, and frequency of the substation and the mobile power generator connected to the load relief side fall within the synchronization range. The uninterruptible power supply is switched between different power supplies.

In power outage work, the operator can directly open and close the section switch installed on the pillar via the operation rope without switching the work switch in parallel and switching the power supply between the work section and the load relief side. A malfunction prevention device is attached to the utility pole as the opening / closing means. Since the power generator for movement is installed at a position away from the malfunction prevention device to be operated, contact for completion of operation to the power generator for movement after operation of the section switch is made verbally or mobile phone Etc. are performed by such means. For this reason, there is a problem that it takes time until the next control due to a case in which a switching completion instruction to the moving power generation device side is neglected or a case where accurate transmission cannot be performed.
Patent Document 1 does not describe a technique related to information transmission between the operator of the segment switch and the operator on the side of the moving power generation device.

  Accordingly, an object of the present invention is to provide a malfunction prevention device for a segment switch that can transmit operation completion information to the moving power generator immediately after the segment switch is operated.

The present invention opens a section switch between a commercial power source and a load, installs a moving power generator for the load after the opened section switch, and makes the power source uninterrupted between the commercial power source and the moving power generator. In the device for switching power and switching back, in the malfunction prevention device for the operation of the section switch installed in the vicinity of the section switch,
The malfunction prevention device includes a lock release unit that releases a locked state when the commercial power supply and the power generation device for movement are synchronized, and an operation rope of the section switch that is wound around to release the lock by the lock release unit. A winding drum that becomes a state, a rotation detection unit that detects an open / closed state of the section switch from an operation amount of the operation rope, and an operation amount signal of the operation rope detected by the rotation detection unit It is characterized in that it is provided with a transmission means for transmitting wirelessly .

  The malfunction prevention device of the present invention is characterized by comprising a display unit for displaying a detection signal of the rotation detection unit.

  As described above, according to the present invention, when the switch is operated by using the malfunction prevention device, the completion of the operation can be grasped even on the side of the mobile power supply vehicle, so that the next operation can be started immediately. It is possible to prevent useless time associated with waiting for communication when the power is switched off.

FIG. 2 is a system configuration diagram to which the present invention is applied.
Reference numeral 1 denotes a distribution switch for a distribution line, which is installed on a utility pole 2. The section switch 1 is provided with a lever 1a for turning on and off the switch, and an operation rope 1b for connection is connected to one end, and an operation rope 1c for cutting is connected to the other end. By pulling the operation rope 1b, the lever 1a rotates clockwise about the support shaft to open the switch. Further, by pulling the operation rope 1c, the lever 1a rotates counterclockwise around the support shaft to open the switch.

  Reference numeral 3 denotes a synchronization control device. The synchronization control device 3 includes phase rotation, voltage difference, frequency difference, phase difference, power calculation, wireless transmission / reception device, and the like, and is attached to the utility pole 2. The synchronous control device 3 includes a charger and a storage battery, and further includes a distribution line current indicator, a sensor power indicator, a power indicator, and the like. Reference numeral 4 denotes an erroneous operation prevention device for preventing an erroneous operation of the section switch 1 and is attached to the utility pole 2 via a fixing belt.

  Reference numerals 5 and 6 denote voltage / current sensors arranged on the section switch 1 and the commercial power source. These sensors 5 and 6 are attached to the distribution line, and each detected output is input to the synchronous control device 3.

  7 and 8 are voltage sensors, and non-contact type sensors such as alkaline batteries are used. Each of the sensors 7 and 8 is disposed on the load side to be relieved as viewed from the section switch 1, but is attached to the distribution line using an insulating operation bar in a live line state, and each detected output Is input to the synchronous control device 3. Reference numeral 9 is a wireless repeater using modem transmission, and 10 is a mobile power supply vehicle for a mobile power generation device. The mobile power supply vehicle 10 has a wireless transmission device including a transmitter / receiver, and the synchronous control device 3 includes a wireless repeater 9. Signals are exchanged through the network. Note that the wireless repeater 9 is not necessarily required, and the wireless repeater 9 is not necessary when the mobile power supply vehicle 10 is parked at a position where wireless communication with the synchronization control device 3 is sufficiently possible. Become. Further, the generator output of the mobile power supply vehicle 10 is hot-connected to the distribution line on the relief load side through a circuit breaker (not shown).

  FIG. 1 shows an embodiment of the malfunction prevention device 4 of the present invention, where (a) is a front view, (b) is a side view, and (c) is a top view. Power for operation of the malfunction prevention device 4 is supplied from the synchronization control device 3. Reference numeral 11 denotes an electromagnet coil that is normally locked (non-excited) and prevents malfunction, but is excited by a synchronization completion signal from the synchronization control device 3 to attract the movable piece 12 upward in the drawing. Reference numeral 13 denotes a locking wheel. A notch 13a is formed at an outer circumferential portion with an arbitrary interval, and is fixed to the rotating shaft 14. Reference numeral 15 denotes a claw portion. One end side of the claw portion 15 is pivotally supported by a shaft 15a, and a claw 15b is provided on the other end side. The claw portion 15 is always engaged with the notch portion 13a of the wheel by the action of the spring 15c. is doing. And these 11-11 comprise the lock release part which consists of a ratchet mechanism.

  The other end of the rotating shaft 14 having one end fixed to the locking wheel 13 passes through a bearing 16 such as an oilless bearing and is fixed to the winding drum 17 as shown in FIG. The operation rope 1b or 1c of the switch 1 is, for example, wound once on the outer periphery winding portion 17a of the winding drum 17 and led out downward in the drawing, and the tip of the operation rope 1b hangs down to an operable position. Reference numeral 19 denotes an operation rope slack prevention pad that presses the operation rope against the winding portion 17a to prevent the rope from slackening.

  Reference numeral 20 denotes a detection unit that uses a proximity sensor or a microswitch. Here, a proximity sensor is used. Reference numeral 21 denotes a proximity sensor dog, which is fixed to a rotating wheel 13 such as a locking wheel 13 at 90 ° intervals. The detection unit 20 and the proximity sensor dog 21 constitute a rotation detection unit. Reference numeral 22 denotes a wireless transmission means for transmitting an operation completion signal detected by the rotation detection unit to the mobile power supply vehicle side via the transmission means 22. Reference numeral 23 denotes a display unit, and 24 denotes a connector, which is connected to the synchronous control device 3 through this connector to obtain a power source. These 11 to 24 are accommodated in the main body case 25.

  The operating lever 1a of the sorting switch 1 can know in advance the movement distance when operating from the on state to the open state or from the open state to the on state. On the other hand, the rotational distance between the dogs 21 can be known in advance if the diameter of the rotating part of the malfunction prevention device 4 is determined. Therefore, the number of on / off operations of the proximity sensor 20 is detected and displayed on the display unit 23. The user can also know the operating state of the section switch.

Next, the operation will be described.
Prior to the power outage work, preparatory work for uninterruptible switching between the commercial power source and the mobile power source car is carried out. At that time, the mobile power source car 9 is an arbitrary one that does not interfere with traffic away from the section switch. Park in vacant lots and parking lots.

A synchronous control device 3 and an erroneous operation prevention device 4 are attached to the utility pole 2 of the final section switch in the power outage construction section, and the output terminals of the sensors 7 and 8 are connected to the synchronous control device 3 via connectors or the like and turned on. Confirmation etc. It should be noted that when the erroneous operation preventing device 4 is attached, the operation rope is attached so that there is no slack. At the same time, the positions of the proximity sensor 20 and the dog 21 are adjusted, and the display unit 23 stands by in a reset state.

  When the wireless repeater 9 is used, a power pole that does not hinder wireless communication is selected and attached between the power pole 2 to which the synchronization control device 3 is attached and the parked mobile power supply car 10. In particular, when the wireless repeater is installed on the utility pole, the mobile power supply car is also parked along the utility pole, so that it is easy to serve as a radio wave passing point as a relay position. All necessary preparations for uninterruptible switching such as the antenna stand of the repeater 9 and the mobile power supply car 10 after the repeater is installed, the power supply or control power supply is turned on, the communication test of each part, the operation check of the radio repeater modem, etc. To implement. Thereafter, each phase of the high-voltage cable of the mobile power supply vehicle is hot-wired according to the white phase and the red phase of the voltage sensors 7 and 8. As a result, the commercial power supply is pressurized up to the generator breaker of the mobile power supply car 10, so the generator of the mobile power supply car is started, and the generator and the commercial power supply are synchronized on the power supply car side to allow the input When the range is reached, the generator breaker is turned on, and the synchronization signal is transmitted from the mobile power source vehicle via the repeater or directly to the synchronization control device 3, and the synchronization control device 3 confirms that the synchronization is completed. After confirming, a lock release command is output to the malfunction prevention device 4. The electromagnet coil 11 is excited by the release command to attract the movable piece 12, the engagement between the notch 13a and the claw 15b is released, and the lock wheel 13 is in a free state.

  On the mobile power supply vehicle side, the governor of the mobile power supply vehicle is controlled until the distribution line power transmitted from the synchronous control device 3 is close to 0, and the load is gradually taken into the mobile power supply vehicle side. When the load loading is completed, the completion notice is sent to the worker waiting in the final section switch 1 of the power outage work section by wireless means or the like. The operator pulls the operation rope 1b hanging down to the lower part of the malfunction prevention device 4 so that the lever 1a of the section switch 1 connected to the rope is operated to the open circuit side, and the power is switched without interruption. Thus, the commercial power supply to the relief load side is completely cut off.

  When the operating rope 1b is pulled to open the section switch, the winding drum 17 and the locking wheel 13 are also rotated together via the rotating shaft 14, and the dog 21 fixed to the locking wheel 13 is also rotated together. Then, it passes through the front surface of the proximity sensor 20. The proximity sensor 20 counts on / off for each passage of the dog and displays it on the display unit 23 and transmits it to the mobile power supply vehicle side via the wireless device 22. Note that this transmission signal may be transmitted as it is as the signal for each count, or may be transmitted as a completion signal when a predetermined value is reached when the switching of the switch is completed.

  On the mobile power supply vehicle side, the signal transmitted from the malfunction prevention device 4 is received, and based on this signal, it is possible to know the completion of the shutoff of the segment switch 1 by some means such as lamp display or sound.

  Therefore, when operating the segment switch using the malfunction prevention device of the present invention, it is possible to grasp the completion of operation even on the mobile power supply vehicle side, so that the next work can be started immediately, and when switching the uninterruptible power supply as in the past It is possible to prevent wasted time associated with waiting for contact.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the malfunction prevention apparatus which shows embodiment of this invention, (a) is a front view, (b) is a side view, (c) Top view. The block diagram of the uninterruptible switching apparatus between different power sources in which the present invention is used.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Section switch 2 ... Utility pole 3 ... Synchronous control device 4 ... Malfunction prevention device 5, 6 ... Voltage / current sensor 7, 8 ... Voltage sensor 9 ... Wireless repeater 10 ... Power generator for movement (mobile power supply car)
DESCRIPTION OF SYMBOLS 11 ... Electromagnet coil 12 ... Movable piece 13 ... Locking wheel 14 ... Rotating shaft 15 ... Claw part 16 ... Bearing 17 ... Winding drum 20 ... Proximity sensor 21 ... Dog 22 ... Transmission means 23 ... Display part

Claims (3)

Open the segment switch between the commercial power source and the load, install a mobile power generator for the load after the open segment switch, and switch the power between the commercial power source and the mobile power generator without interruption. In the device for performing the switchback, in the malfunction prevention device for the section switch operation installed in the vicinity of the section switch,
The malfunction prevention device includes a lock release unit that releases a locked state when the commercial power supply and the power generation device for movement are synchronized, and an operation rope of the section switch that is wound around to release the lock by the lock release unit. A winding drum that becomes a state, a rotation detection unit that detects an open / closed state of the section switch from an operation amount of the operation rope, and an operation amount signal of the operation rope detected by the rotation detection unit A malfunction prevention device for a sectional switch, characterized in that a transmission means for wireless transmission is provided . 2. The malfunction for a section switch according to claim 1, wherein the rotation detection unit includes a dog fixed to the lock wheel of the lock release unit or the winding drum, and a proximity sensor that detects passage of the dog. Prevention device. The malfunction prevention device for a sectional switch according to claim 1 or 2, wherein the malfunction prevention device includes a display unit that displays a detection signal of the rotation detection unit.

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