JP5560442B2 - Reverse feed switching device for voltage regulator - Google Patents

Description

  The present invention relates to a reverse regulator switching device for a voltage regulator for connecting a voltage regulator to a distribution line system, so that the voltage can be regulated using the voltage regulator even during reverse power transmission flowing from the load side to the power source side. It relates to technology.

  In order to stably supply power, a configuration is adopted in which an automatic voltage regulator (SVR: Step Voltage Regulator) is arranged in series in the middle of the distribution line system. This automatic voltage regulator automatically switches the taps of the transformers constituting the voltage regulator to compensate for the voltage drop of the distribution line and adjusts the voltage.

  FIG. 1 shows an embodiment in which this automatic voltage regulator is connected to a distribution line system. As shown in the figure, the automatic voltage regulator 1 is connected to a power distribution system 3 via a switch 2. The switch 2 includes three manually operated switching units 4a, 4b, and 4c that operate independently, and the automatic voltage regulator 1 is bypassed by appropriately opening and closing the switching units 4a, 4b, and 4c. Inspection and testing can be performed.

  That is, the switch 2 includes a power supply side terminal 2 a connected to the power supply side upstream of the distribution system 3, a load side terminal 2 b connected to the load side downstream of the distribution system 3, and the primary of the automatic voltage regulator 1. The primary side terminal 2c connected to the side and the secondary side terminal 2d connected to the secondary side of the automatic voltage regulator 1 are provided, and each terminal is connected to a predetermined distribution system 3 and the automatic voltage regulator 1 respectively. . Further, the switch 2 connects the power supply side terminal 2a and the load side terminal 2b via the first opening / closing part 4a, and the first opening / closing part 4a makes it possible to energize and shut off both terminals 2a, 2b. Yes. Further, the power supply side terminal 2a and the primary side terminal 2c are connected via the second opening / closing part 4b, and the load side terminal 2b and the secondary side terminal 2d are connected via the third opening / closing part 4c.

  During normal operation, the first opening / closing part 4a is opened, and the second and third opening / closing parts 4b, 4c are closed. As a result, as shown in FIG. 1A, during forward power transmission in which voltage is supplied from the power supply side to the load side, the current is automatically transmitted from the power supply side terminal 2a via the second opening / closing part 4b. Input to the primary side of the voltage regulator 1. And the voltage adjusted according to the position of the tap T generate | occur | produces in the secondary side of the automatic voltage regulator 1, and the voltage is supplied to the load side via the 3rd opening-and-closing part 4c.

  At the time of maintenance and inspection of the automatic voltage regulator 1, the automatic voltage regulator 1 is connected to the distribution line 3 by setting the first opening / closing part 4 a to the closed state and the second and third opening / closing parts 4 b, 4 c to the open state. The power supply to the load side can be performed via the first opening / closing part 4a.

Special opening and closing 11-54000

  By the way, cases of reverse transmission / reverse tide are increasing due to an increase in distributed power sources such as system switching and photovoltaic power generation / co-generation. Since the voltage adjustment (tap switching) in the existing automatic voltage regulator 1 described above is based on the premise that current flows from the primary side to the secondary side, as shown in FIG. At the time of reverse power transmission in which current flows to the side, the position of the secondary tap T is fixed at the same reference position as the primary side, and the automatic voltage regulator 1 is in a through state (not transformed by a transformer). Therefore, there is a problem that voltage cannot be adjusted and voltage cannot be stably supplied during reverse power transmission.

  With the use of natural energy such as solar and wind power to curb carbon dioxide emissions as a global warming prevention measure and the gathering of local and corporate power generation businesses associated with the liberalization of electricity, Since the case of reverse tide is expected to continue and expand in the future, the development of an automatic voltage regulator for reverse feed and reverse tide that can adjust the voltage even when the primary side current flows from the secondary side Is needed. However, the automatic voltage regulator for reverse transmission / reverse tide requires complicated control to cope with many system events, and further theory needs to be established. Until this control method is established, it will not be possible to commercialize the automatic voltage regulator for reverse feed / reverse tide itself or to standardize it. Furthermore, switching an existing automatic voltage regulator to such an automatic voltage regulator that supports reverse transmission / reverse tide is difficult not only in terms of technology but also in terms of cost, and there is a problem that it cannot be easily performed.

  In order to solve the above-described problems, the present invention provides (1) a power supply side terminal connected to the power supply side of the distribution system, a load side terminal connected to the load side of the distribution system, and a primary voltage regulator. A primary side terminal connected to the side, a secondary side terminal connected to the secondary side of the voltage regulator, a first opening / closing part disposed between the power supply side terminal and the load side terminal, A second opening / closing part disposed between the power supply side terminal and the primary side terminal; a third opening / closing part disposed between the load side terminal and the secondary side terminal; and the load side terminal; A fourth opening / closing portion disposed between the primary side terminal and a fifth opening / closing portion disposed between the power source side terminal and the secondary side terminal, wherein the power distribution system is configured for forward power transmission. When closing the second opening / closing part and the third opening / closing part, the other opening / closing part is set to the forward power transmission mode, and the power distribution system During reverse power transmission, the fourth opening and closing part and the fifth opening and closing part are closed, and the other opening and closing part is set to the reverse power transmission mode, and the first opening and closing part is closed, It was configured to open and close to switch between the forward power transmission mode and the reverse power transmission mode.

  With this configuration, in the reverse power transmission mode, the current flowing from the load side terminal can flow from the fourth switching unit to the primary side of the voltage regulator via the primary side terminal. Further, based on a desired voltage generated on the secondary side of the voltage regulator, a current can be passed from the secondary side terminal to the distribution system via the fifth opening / closing part. Therefore, even during reverse power transmission, a current can be passed from the primary side to the secondary side to the voltage regulator, and voltage adjustment is possible.

  (2) It is preferable to switch the forward power transmission mode and the reverse power transmission mode by closing the first opening / closing section in a state where the voltage regulator is not transformed between the primary side and the secondary side. Once in the through state, the potential difference between the load side terminal and the power supply side terminal can be reduced to 0 (almost 0). Therefore, even if the first opening / closing part is closed in this state, there is no problem. Therefore, by performing switching between forward power transmission and reverse power transmission in a transparent state, the load opening / closing function is not necessary for this apparatus.

(3) As a specific configuration, the four terminals are arranged so that a line connecting the power supply side terminal and the load side terminal intersects a line connecting the primary side terminal and the secondary side terminal. In the case, a first rotating body and a second rotating body that are connected to a rotating shaft and rotate integrally are provided in the case, and the first rotating body is in a rotating plane orthogonal to the rotating shaft. A first conductor portion and a second conductor portion are provided at predetermined positions on the circumference, and on the circumference, the four terminals are the power source side terminal, the primary side terminal, the load side terminal, the second side The first conductor portion and the second conductor portion are arranged in the order of the secondary terminals , and each of the first conductor portion and the second conductor portion is adjacent to each other in the rotating direction of the first rotating body among the four terminals as the first rotating body rotates. Simultaneously contact the two terminals to make the two adjacent terminals conductive, and the other two terminals The second rotating body is set to be simultaneously connected to the power-side terminal and the load-side terminal depending on the rotational position. And a pair of third conductor portions that are in a non-conducting state and a pair of third conductor portions are configured to be electrically connected to each other, and a part of the third conductor portion It is preferable that the first conductor portion and the second conductor portion are arranged so as to overlap with each other. If it does in this way, switching of opening and closing of each said opening-and-closing part can be performed appropriately only by rotating a rotating shaft.

  (4) The first rotating body includes a ring-shaped insulating support plate, and the first conductor portion and the second conductor portion are attached to a surface of the support plate, and the first and second conductor portions are attached to the surface. And the surface of the unformed region of the first and second conductor portions may be formed on the same plane.

  (5) The second rotating body includes a ring-shaped insulating support plate, the third conductor portion is attached to the surface of the support plate, the surface of the third conductor portion, and the third conductor portion. The surface of the unformed region may be formed so as to be positioned on the same plane.

  According to the above inventions (4) and (5), when the contact of each terminal is detached from the conductor part or connected, there is no step in the unformed region of the conductor part and the conductor part, so that the smooth operation can be performed. Further, it is possible to suppress the occurrence of wear / damage of terminals and conductors caused by repeatedly switching between opening and closing.

  (6) The second rotating body includes a pair of third conductor portions arranged on the opposite side in the radial direction and a connecting plate that connects the third conductor portions, and is attached to the rotating shaft via the connecting plate. Good.

  In the present invention, the current always flows from the primary side to the secondary side in the voltage regulator, so that the existing voltage regulator is not touched or the reverse adjustment (reverse tide) is made with a minimum of modification. It becomes possible to cope with voltage adjustment.

It is a figure which shows a prior art example. 1 is a circuit diagram showing a preferred embodiment of a reverse switching device for a voltage regulator according to the present invention. FIG. FIG. It is a figure explaining an effect | action. It is a figure explaining an effect | action. It is a figure explaining an effect | action. It is a figure explaining an effect | action. It is a figure explaining an effect | action. It is a figure explaining an effect | action. It is a figure explaining an effect | action.

  FIG. 2 shows a preferred embodiment of a reverse switching device for a voltage regulator according to the present invention. The voltage regulator reverse feed switching device 10 connects an automatic voltage regulator (SVR) 11 in series with a power distribution system 13, and the current flowing through the power distribution system 13 is automatically controlled during both forward power transmission and reverse power transmission. This is a device for enabling voltage adjustment by the voltage regulator 11.

  The reverse switching device 10 for voltage regulator includes a power supply side terminal 15a connected to the power supply side upstream of the distribution system 13, a load side terminal 15b connected to the load side downstream of the distribution system 13, and an automatic voltage adjustment. A primary side terminal 15c connected to the primary side of the device 11 and a secondary side terminal 15d connected to the secondary side of the automatic voltage regulator 11, each terminal being a predetermined distribution system 13 and an automatic voltage regulator, respectively. 11 is connected. In the figure, one phase is shown. Actually, a configuration corresponding to three phases is provided for three phases. The same applies to the following description.

  Furthermore, the reverse adjustment switching device 10 for the voltage regulator connects the power supply side terminal 15a and the load side terminal 15b via the first opening / closing part 14a, and opens and closes the first opening / closing part 14a. It is possible to energize and cut off between 15b. Further, the power supply side terminal 15a and the primary side terminal 15c are connected via the second opening / closing part 14b, and the load side terminal 15b and the secondary side terminal 15d are connected via the third opening / closing part 14c. Further, in the present embodiment, the load side terminal 15b and the primary side terminal 15c are connected via the fourth opening / closing part 14d, and the power source side terminal 15a and the secondary side terminal 15d are connected via the fifth opening / closing part 14e. .

  Thus, by arranging the five opening / closing sections at appropriate positions and controlling the opening / closing thereof, the direction of the current flowing into the automatic voltage regulator 11 is the same even if the power transmission direction of the distribution system (high voltage system) changes. Can be. That is, since the current always flows into the automatic voltage regulator 11 from the primary side, the voltage on the secondary side can be kept constant by appropriately switching the position of the tap T in both cases of forward transmission and reverse transmission. Can be adjusted.

  That is, as shown in FIG. 2 (a), during forward power transmission, the first opening / closing part 14a, the fourth opening / closing part 14d, and the fifth opening / closing part 14e are opened, and the second opening / closing part 14b and the third opening / closing part 14 The opening / closing part 14c is closed. As a result, the power supply side terminal 15a and the primary side terminal 15c are brought into conduction, and the load side terminal 15b and the secondary side terminal 15d are brought into conduction. Therefore, the current that has flowed into the voltage regulator reverse feed switching device 10 from the power supply side terminal 15a side reaches the primary side terminal 15c via the second opening / closing part 14b and flows into the primary side of the automatic voltage regulator 11. . Thereby, a desired voltage is applied to the primary side of the automatic voltage regulator 11, and a desired voltage corresponding to the position of the tap T is generated on the secondary side. Therefore, a current based on the generated voltage is It flows in the order of the secondary side terminal 15d → the third opening / closing part 14c → the load side terminal 15b, and power can be supplied to the load side. The function / action during forward power transmission can basically adopt the same configuration as that shown in FIG.

  On the other hand, as shown in FIG. 2B, during reverse power transmission, the first opening / closing part 14a, the second opening / closing part 14b, and the third opening / closing part 14c are opened, and the fourth opening / closing part 14d and the fifth opening / closing part 14 The opening / closing part 14e is closed. As a result, the power supply side terminal 15a and the secondary side terminal 15d are brought into conduction, and the load side terminal 15b and the primary side terminal 15c are brought into conduction. Therefore, the current that has flowed into the voltage regulator reverse switching device 10 from the load side terminal 15b side reaches the primary side terminal 15c via the fourth opening / closing part 14d and flows into the primary side of the automatic voltage regulator 11. . Thereby, a desired voltage is applied to the primary side of the automatic voltage regulator 11, and a desired voltage corresponding to the position of the tap T is generated on the secondary side. Therefore, a current based on the generated voltage is It flows in the order of the secondary side terminal 15d → the fifth opening / closing part 14e → the power source side terminal 15a, and power can be supplied to the power source side.

  Further, although not shown in the figure, only the first opening / closing part 14a is closed and the other opening / closing part is opened, thereby making the power supply side terminal 15a and the load side terminal 15b conductive, and distributing the automatic voltage regulator 11 to the power supply. It can be disconnected from the system 13. Thereby, the maintenance check etc. with respect to the automatic voltage regulator 11 can be performed.

  By using the voltage regulator reverse switching device 10 of the present embodiment, the automatic voltage regulator 11 has the same number of taps and tap values during reverse power transmission as in forward power transmission. And the voltage control by tap switching at the time of reverse power transmission can be controlled using the primary side voltage / current information obtained from the existing VT (instrument transformer) and CT (current transformer). Voltage control during reverse power transmission can be performed without adding an additional sensor or control circuit, and the voltage control effect during reverse power transmission is comparable to the control effect during forward power transmission.

  Each of the opening / closing sections 14a to 14e can have various configurations capable of switching the opening and closing manually or automatically. For example, since the switch shown in Patent Document 1 includes the first to third opening / closing parts of the present embodiment, the fourth opening / closing part and the fifth opening / closing part can be connected to such a switch so that predetermined terminals can be connected. However, in this embodiment, switching control of opening / closing of each opening / closing unit is collectively performed at the same timing.

  Further, the automatic voltage regulator 11 is provided with means (67 relay (direction relay)) for monitoring the power flow to itself. In the conventional system, when a reverse current flows through the automatic voltage regulator, the tap position is switched to make it pass (not transformed). Therefore, in the present embodiment, switching of the opening / closing of each open / close unit is controlled based on the output of the means for monitoring the power flow, and the automatic voltage regulator 11 is controlled in each state during forward power transmission and reverse power transmission. Thus, it is possible to automatically cause a current to flow from the primary side.

  Specifically, by using a rotary contact structure switching device and rotating the contact, the forward power transmission mode during forward power transmission, the reverse power transmission mode during reverse power transmission, and the automatic voltage regulator 11 are distributed. The bypass mode to be separated from the system can be switched appropriately. That is, as shown in FIGS. 3 and 4, the voltage regulator reverse transfer switching device 10 attaches the first rotating plate 22 and the second rotating plate 23 to the rotating shaft 21 built in the rectangular case 20. The first rotating plate 22 and the second rotating plate 23 are configured to come into contact with the terminals 15a to 15d disposed at the four corners of the case 10, respectively. As shown in FIG. 3, the power supply side terminal 15a and the load side terminal 15b are arranged on a diagonal line, and the primary side terminal 15c and the secondary side terminal 15d are arranged on another diagonal line. In other words, the line connecting the power supply side terminal 15a and the load side terminal 15b and the line connecting the primary side terminal 15c and the secondary side terminal 15d are arranged to be orthogonal to each other. In the present invention, it is not always necessary to arrange them orthogonally, and when the connecting lines intersect at a predetermined angle (non-right angle), the formation region of the conductor portion formed on each of the rotary plates 22 and 23 This can be dealt with by appropriately modifying and setting.

  Furthermore, the tips 15a 'to 15d' of the terminals 15a to 15d on the case 20 side branch into two forks, and the tip contacts (the tip contacts 15a 'of the power supply side terminal 15a and the load side terminal 15b in FIG. 4). When the first contact point 15b 'is in contact with the first rotating plate 22 and the second rotating plate 23 and contacts the conductor part of the rotating plate, the conductor part and the tip contact, and thus the terminal, are in a conductive state. Yes.

  The rotation of the rotation shaft 21 is controlled by the operation mechanism unit 24 mounted in the case 20. The operation mechanism unit 24 includes a drive motor that can control the rotation angle, such as a servo motor, and a control unit that controls the rotation of the drive motor. The control unit determines whether it is necessary to switch modes based on a signal indicating the current state (forward power transmission (forward power flow) OR reverse power transmission (reverse power flow)) sent from the automatic voltage regulator 11. When mode switching is necessary, the open / close state of each of the open / close portions 14a to 14e is switched to a desired state by rotating the rotary shaft 21 by a predetermined angle (predetermined terminals (15a to 15d) are connected to each other). ).

  As shown in FIG. 3B, the first rotating plate 22 connects the ring-shaped support plate 22a to the rotating shaft 21 by a strip-shaped connecting arm 22b extending in a cross shape. Conductor portions (first conductor portion 22c, second conductor portion 22d) are attached to and integrated with the support plate 22a at two locations along the circumference. The first conductor portion 22c and the second conductor portion 22d have an arcuate plane parallel to the mounting surface of the support plate 22a, and an insulating region 22e is formed between the first conductor portion 22c and the second conductor portion 22d. The two conductor portions 22c and 22d are insulated from each other. This insulating region 22e is actually formed by using a resin such as FRP and integrally forming a convex portion at a predetermined position on the conductor portion mounting surface side of the disc-shaped support plate 22a. The surface of the insulating region 22e is flush with the surfaces of the first and second conductor portions 22c and 22d.

  The positions where the first and second conductor portions 22c and 22d are formed are such that two adjacent terminals are connected to one conductor portion, the two adjacent terminals are conducted through the conductor portion, and the other two terminals are connected. Is in a non-conducting state (the three terminals do not contact one conductor portion at the same time), and four conductor portions are 1 on the conductor portions 22c and 22d and the two insulating regions 22e, respectively. Each conductor portion is set to be in a non-conducting state with each other via the first rotating plate 22.

  In FIG. 3A, the power supply side terminal 15a and the primary side terminal 15c are conducted through the first conductor portion 22c, and the load side terminal 15b and the secondary side terminal 15d are conducted through the second conductor portion 22d. To do. At this time, the pair of the power supply side terminal 15a and the primary side terminal 15c and the pair of the load side terminal 15b and the secondary side terminal 15d are in a non-conductive state. This state means that the second opening / closing part 14b and the third opening / closing part 14c are closed.

Further, in FIG. 9A and the like, the load side terminal 15b and the primary side terminal 15c are electrically connected via the first conductor portion 22c, and the power source side terminal 15a and the secondary side terminal 15d connect the second conductor portion 22d. It will be in the state connected through. This state means that the fourth opening / closing part 14d and the fifth opening / closing part 14e are closed.
Of course, by changing the rotation angle of the first rotating plate 22, conduction between adjacent terminals can be achieved using a conductor portion opposite to the above.

  Further, as shown in FIG. 8 (a), the power supply side terminal 15a and the load side terminal 15b are respectively located in different insulating regions 22e, the primary side terminal 15c is in contact with the first conductor portion 22c, and the secondary side The side terminal 15d can be in contact with the second conductor portion 22d. In this state, all the opening / closing parts are in the open circuit state in the first rotating plate 22. As will be described later, since the power supply side terminal 15a and the load side terminal 15b are electrically connected via the second rotating plate 23, the first opening / closing part 14a is actually closed by the second rotating plate 23. become.

  On the other hand, the second rotating plate 23 includes a pair of arc-shaped third conductor portions 23a disposed on the opposite side in the radial direction. The third conductor portions 23a are electrically connected to each other by a strip-shaped conductor plate 23b. Actually, the two third conductor portions 23a and the conductor plate 23b are integrally formed. A through hole is formed in the center of the conductor plate 23b, and the rotating shaft 21 is attached. A predetermined insulation process is performed between the rotating shaft and the conductor plate 23b. In this embodiment, the pair of third conductor portions 23a are electrically connected to each other by the conductor plate 23b integrally formed with the third conductor portion 23a. However, the present invention is not limited to this, and rotation is possible. A member that is attached to the shaft 21 and mechanically connects the pair of third conductor portions 23a is composed of an insulating member such as a resin like the connecting arm 22b of the first rotating plate 22, and leads and other conducting members. A pair of third conductor portions 23a may be electrically connected to each other.

  The diameters of the third conductor portion 23a, the first conductor portion 22c, and the second conductor portion 22d are the same. Thus, when the first and second rotary plates 22 and 23 are attached to the rotary shaft 21, the rotary plates 22 and 23 are arranged in parallel to each other and the outer peripheral edges thereof coincide. Further, the third conductor portion 23a overlaps with the insulating region 22e of the first rotating plate 22, and both ends in the circumferential direction of the third conductor portion 23a overlap with the first conductor portion 22c and the second conductor portion 22d, respectively. ing.

  Further, the second rotating plate 23 is also preferably provided with a ring-shaped support plate 23c like the first rotating plate 22, and the third conductor portion 23a and the conductor plate 23b are mounted on the support plate 23c. That is, the surface of the insulating region 23d on the surface of the support plate 23c where the third conductor portion 23a is not disposed is flush with the surface of the third conductor portion 23a. In other words, an inner shape concave portion 23e that matches the outer shape of the third conductor portion 23a is provided in a region facing the third conductor portion 23a on the surface of the support plate 23c, and the third conductor portion 23a is provided in the concave portion 23e. Fit. In this way, even when the tip contact of each terminal moves on the boundary portion between the third conductor portion 23a and the insulating region 23d, there is no step at the boundary portion, so the tip contact can move smoothly. A large impact is not generated between the second rotating plate 23 and damage can be prevented.

  As shown in FIG. 3, the pair of third conductor portions 23a is in a non-contact state with any of the terminals, and as shown in FIG. 7 and the like, the opposing terminals (in FIG. 7, the power supply side terminal 15a and the load side terminal 15b) can be switched. The state shown in FIG. 7 means that the first opening / closing part 14a is in a closed state.

  By rotating the rotary shaft 21, the first rotary plate 22 and the second rotary plate 23 rotate simultaneously, and the terminals connected to the same type 22c, 22d, 23a are switched. Will be composed. And by performing this rotation, switching between the forward power transmission mode and the reverse power transmission mode can be performed.

  Next, the operation principle of this embodiment will be described. FIG. 5 and subsequent figures show mode switching in the case of reverse power transmission from the forward power transmission state. First, FIG. 5 shows a state during forward power transmission. As shown in FIG. 5A, the power supply side terminal 15a and the primary side terminal 15c are electrically connected via the first conductor portion 22c (the second opening / closing portion 14b is in a closed state), and the load side terminal 15b and the secondary side terminal 15c are connected. The side terminal 15d is electrically connected via the second conductor portion 22d (the third opening / closing portion 14c is in the open state). Moreover, the 3rd conductor part 23a of the 2nd rotary plate 23 will be in a non-contact state with any terminal 15a-15d.

  Thereby, as shown in FIG.5 (b), the 2nd opening-and-closing part 14b and the 3rd opening-and-closing part 14c will be in a closed circuit state, and the other opening-and-closing parts 14a, 14d, and 14e will be in an open circuit state. Therefore, the current from the power supply side terminal 15a is input to the primary side of the automatic voltage regulator 11 from the first conductor portion 22c (second opening / closing portion 14b) via the primary side terminal 15c. A voltage corresponding to the position of the tap T is generated on the secondary side of the regulator 11. The voltage generated on the secondary side is supplied to the load side via the secondary side terminal 15d → second conductor portion 22d (third opening / closing portion 14c) → load side terminal 15b. The position of the tap T is appropriately changed by the function of the automatic voltage regulator 11, and stable power supply can be performed.

  When it is detected that 67 relays in the automatic voltage regulator 11 are in the reverse transmission state during the forward power transmission, the automatic voltage regulator 11 is switched to the through state as shown in FIG. 6B. That is, the position of the tap T returns to the reference position, and the state is not transformed. At this time, the reverse adjustment switching device for voltage regulator 10 is held as it is during forward power transmission. Therefore, the current that has flowed into the voltage regulator reverse switching device 10 from the load-side terminal 15b is transferred from the second conductor portion 22d (third opening / closing portion 14c) to the automatic voltage regulator 11 via the secondary-side terminal 15d. It flows into the secondary side. Since it is in the through state, the secondary side voltage appears as it is as the primary side voltage and is supplied to the power source side via the primary side terminal 15c → the first conductor portion 22c (second opening / closing portion 14b) → the power source side terminal 15a. Is done. Thereby, the reverse feed state can be maintained without damaging the automatic voltage regulator 11. This is the same as the operation at the time of reverse power transmission using the apparatus shown in FIG.

  Next, in the present embodiment, the automatic voltage regulator 11 notifies the reverse regulator 10 for voltage regulator switching (operation mechanism unit 24) that the reverse power transmission has been performed and the switching to the passing state has been performed. Accordingly, the operating mechanism unit 24 that has received such notification operates the drive motor to rotate the rotating shaft 21 (clockwise in FIG. 6A), and as shown in FIG. 7A, the first rotating plate On the 22nd side, the power supply side terminal 15a and the primary side terminal 15c are conducted through the first conductor portion 22c (the second opening / closing portion is in a closed state), and the load side terminal 15b and the secondary side terminal 15d are connected to each other. On the second rotating plate 23 side, the power-side terminal 15a and the load-side terminal 15b connect the third conductor portion 23a while maintaining a state where the two conductor portions 22d are in conduction (the third opening / closing portion is in an open state). And the first opening / closing portion 14a is closed.

  Accordingly, as shown in FIG. 7B, the first opening / closing part 14a, the second opening / closing part 14b, and the third opening / closing part 14c are closed, and the fourth opening / closing part 14d and the fifth opening / closing part 14e are opened. Become. Therefore, a loop open circuit is formed between the load side terminal 15b and the power supply side terminal 15a, and current flows through the third conductor portion 23a (first opening / closing portion 14a) directly connected.

  Next, the operation mechanism unit 24 further rotates the rotating shaft 21, and as shown in FIG. 8A, while maintaining the conduction state of the power supply side terminal 15a and the load side terminal 15b by the third conductor portion 23a, On the first rotating plate 22 side, the four terminals 15a to 15d are brought into an independent state (non-conductive state). Then, as shown in FIG. 8B, only the first opening / closing part 14a is closed, and the other opening / closing parts are all open, and the automatic voltage regulator 11 is bypassed.

  Next, the operation mechanism unit 24 further rotates the rotating shaft 21 to maintain the conduction state between the power-side terminal 15a and the load-side terminal 15b by the third conductor portion 23a, as shown in FIG. The load side terminal 15b and the primary side terminal 15c are electrically connected via the first conductor portion 22c (the fourth opening / closing portion 14d is in a closed state), and the power source side terminal 15a and the secondary side terminal 15d are connected to the second conductor portion. It is configured to conduct through 22d (the fifth opening / closing part 14e is closed).

  Then, as is clear from FIG. 9 (b), between the load side terminal 15b and the power source side terminal 15a, there is a path through the directly connected third conductor portion 23a (first opening / closing portion 14a), and the load side Power supply via terminal 15b → first conductor part 22c (fourth opening / closing part 14d) → primary terminal 15c → automatic voltage regulator 11 → secondary terminal 15d → first conductor part 22c (fifth opening / closing part 14e) It becomes a loop shape provided with a route to the side terminal 15a. In this state, a current flows from the load side terminal 15b to the power source side terminal 15a via the third conductor portion 23a (first opening / closing portion 14a) directly connected.

  Next, the operation mechanism section 24 further rotates the rotating shaft 21 to bring the third conductor section 23a into a non-contact state with any of the terminals 15a to 15d as shown in FIG. At this time, the load side terminal 15b and the primary side terminal 15c are conducted through the first conductor portion 22c (the fourth opening / closing portion 14d is in a closed state), and the power source side terminal 15a and the secondary side terminal 15d are the second conductor. The state of conducting through the part 22d (the fifth opening / closing part 14e is closed) is maintained.

  Then, as shown in FIG. 10 (b), the first opening / closing part 14a is opened, and the path directly flowing from the load side terminal 15b to the power source side terminal 15a is interrupted. The current that has flowed into the transmission switching device 10 flows from the first conductor portion 22c (fourth opening / closing portion 14d) to the primary side of the automatic voltage regulator 11 via the primary side terminal 15c. Since it is in the through state, the primary side voltage appears as the secondary side voltage as it is, and the secondary side terminal 15d → second conductor portion 22d (fifth opening / closing portion 14e) → the power source side via the power source side terminal 15a. Supplied.

Since the current flowing from the load side terminal 15b enters the primary side of the automatic voltage regulator 11, the normal voltage adjustment can be performed and the position of the tap T so that the voltage output to the secondary side is constant. Are switched (see FIG. 11).
Further, when returning from the reverse power transmission state to the normal forward power transmission state, the forward power transmission mode shown in FIG.

DESCRIPTION OF SYMBOLS 10 Voltage regulator reverse feed switching device 11 Automatic voltage regulator 20 Case 21 Rotating shaft 22 1st rotating plate 22c 1st conductor part 22d 2nd conductor part 23 2nd rotating plate 23a 3rd conductor part 24 Operation mechanism part

Claims (6)

A power supply side terminal connected to the power supply side of the distribution system;
A load side terminal connected to the load side of the distribution system;
A primary terminal connected to the primary side of the voltage regulator;
A secondary terminal connected to the secondary side of the voltage regulator;
A first opening / closing part disposed between the power supply side terminal and the load side terminal;
A second opening / closing part disposed between the power supply side terminal and the primary side terminal;
A third opening / closing part disposed between the load side terminal and the secondary side terminal;
A fourth opening / closing part disposed between the load side terminal and the primary side terminal;
A fifth opening / closing part disposed between the power supply side terminal and the secondary side terminal;
With
When the power distribution system is forward power transmission, close the second opening and closing part and the third opening and closing part, and in the forward power transmission mode with the other opening and closing part open,
When the power distribution system is in reverse power transmission, close the fourth opening and closing part and the fifth opening and closing part, and in the reverse power transmission mode with the other opening and closing part open,
A reverse switching device for a voltage regulator configured to switch between the forward power transmission mode and the reverse power transmission mode by opening and closing another open / close portion with the first opening / closing portion closed.   2. The switching between the forward power transmission mode and the reverse power transmission mode is performed by closing the first opening / closing section in a through state where the voltage regulator is not transformed between the primary side and the secondary side. The reverse transfer switching device for voltage regulators described in 1. Attach these four terminals to the case so that the line connecting the power supply side terminal and the load side terminal intersects the line connecting the primary side terminal and the secondary side terminal,
In the case, a first rotating body and a second rotating body that are connected to a rotating shaft and rotate integrally are provided.
The first rotating body has a first conductor portion and a second conductor portion at a predetermined position on a circumference in a rotation plane orthogonal to the rotation axis,
On the circumference, the four terminals are arranged in the order of the power supply side terminal, the primary side terminal, the load side terminal, and the secondary side terminal , and the first conductor portion and the second conductor portion are: Along with the rotation of the first rotating body, the two terminals adjacent to each other in the rotation direction of the first rotating body among the four terminals are simultaneously brought into contact with each other, and the other two terminals are electrically connected to each other. A state in which the two terminals are made non-conductive and a state in which the four terminals are made non-conductive with each other are set,
The second rotating body includes a pair of third conductor portions that are electrically connected to the power supply side terminal and the load side terminal at the same time and a non-conductive state depending on the rotation position, and the pair of third conductors. The parts are configured to be conductive,
And a part of said 3rd conductor part is arrange | positioned on the said circumference | surroundings so that it may overlap with the unformed area | region of a said 1st conductor part and a said 2nd conductor part. 2. The reverse switching device for a voltage regulator according to 2.   The first rotating body includes a ring-shaped insulating support plate, and the first conductor portion and the second conductor portion are attached to the surface of the support plate, and the surfaces of the first and second conductor portions 4. The reverse switching device for a voltage regulator according to claim 3, wherein the surfaces of the unformed regions of the first and second conductor portions are formed on the same plane.   The second rotating body includes a ring-shaped insulating support plate, and the third conductor portion is attached to the surface of the support plate, and the surface of the third conductor portion and the third conductor portion are not formed. 5. The reverse switching device for a voltage regulator according to claim 3, wherein the surface of the region is formed so as to be located on the same plane.   The second rotating body includes a pair of third conductor portions disposed on the opposite side in the radial direction and a connecting plate that connects the third conductor portions, and is attached to the rotating shaft via the connecting plate. The reverse transfer switching device for a voltage regulator according to any one of claims 3 to 5.

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