JP2015005624A - Photovoltaic power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photovoltaic power generation device capable of easy disconnection of a circuit.SOLUTION: A photovoltaic power generation device includes: a plurality of solar batteries connected in series for generating DC power; a power conditioner for converting the DC power generated by the solar batteries into AC power; a switch unit disposed between the solar batteries and the power conditioner, and including a switch for electrically connecting or releasing between the solar batteries and the power conditioner; a connection box for housing the switch unit; and switchover means for switching over the switch to a direction to electrically release the power conditioner from the solar batteries, from the outside of the connection box.

Description

  Embodiments described herein relate generally to a photovoltaic power generation apparatus.

  In a general photovoltaic power generation apparatus, a plurality of solar cells are connected in series to form a solar cell string. A switch for separating circuits in units of solar cell strings is installed in a connection box in which a plurality of solar cell strings are arranged in parallel and connected to a power conditioner.

  Moreover, a switch may be incorporated also in the input part of a power conditioner.

  When there is an abnormality in the output from the solar cell, the power from the solar cell is cut off by, for example, turning off the switch in the power conditioner or the switch in the connection box.

JP2013-38345A

  When a disaster such as a fire occurs in a house where such a solar power generation device is installed, it is necessary to stop the solar power generation device because it hinders fire fighting activities.

  However, the connection box has a structure that cannot be operated from the outside, and it is difficult to operate quickly because it requires a key or the like to open it.

  In some cases, inverters are installed in the house, which can be difficult to operate in the event of a disaster.

  Even if the inverter is stopped, the wiring from the junction box to the inverter is paralleled in the junction box, the energization current is increased, and in some cases, there is a risk of electric shock to the worker.

  Therefore, in order to solve these problems, an embodiment of the present invention provides a solar power generation device that can easily disconnect a circuit.

  In order to achieve the above object, a photovoltaic power generation apparatus according to an embodiment includes a plurality of solar cells connected in series and generating DC power, and a power condition for converting DC power generated by the solar cell into AC power. And a switch provided between the solar cell and the power conditioner, the switch having a switch for electrically connecting or opening the solar cell and the power conditioner, and a junction box for storing the switch And switching means for switching the switch from the outside of the junction box in a direction to electrically open the solar cell and the power conditioner.

The block diagram which shows the structure of the solar power generation device which concerns on 1st Embodiment. The side view which shows the structure of the operation box of the solar power generation device which concerns on 1st Embodiment. The front view which shows the structure of the 1st switch of the solar power generation device which concerns on 1st Embodiment. The side view which shows the structure of the operation box of the solar power generation device which concerns on 2nd Embodiment. The front view which shows the structure of the 1st switch of the solar power generation device which concerns on 2nd Embodiment. The block diagram which shows the structure of the solar power generation device which concerns on 3rd Embodiment. Explanatory drawing which shows the structure of the open | release means of the solar power generation device which concerns on 3rd Embodiment. Explanatory drawing which shows the structure of the open | release means of the solar power generation device which concerns on 4th Embodiment. Explanatory drawing which shows the structure of the operation handle in the open | release means of the solar power generation device which concerns on 4th Embodiment. Explanatory drawing which shows the structure of the open | release means of the solar power generation device which concerns on 5th Embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing the configuration of the photovoltaic power generation apparatus according to the first embodiment.

  The solar power generation device 1 of the present embodiment includes a solar cell 2, an anode cable 3, a cathode cable 4, an anode connector 5, a cathode connector 6, a connection box 8, a power conditioner 9, a first switch 10, and a residential distribution board. Twelve.

  The solar cell 2 is a device or means for generating DC power from the light energy of sunlight.

  Anode cable 3 is electrically connected to the anode of solar cell 2, and cathode cable 4 is electrically connected to the cathode of solar cell 2.

  An anode connector 5 is connected to the anode cable 3, and a cathode connector 6 is connected to the cathode cable 4. A solar cell string 7 in which a plurality of solar cells 2 are connected in series is formed by connecting the anode connector 5 and the cathode connector 6 to each other.

  The connection box 8 parallelizes the plurality of solar cell strings 7 and connects them to the power conditioner 9.

  In the connection box 8, the 1st switch 10 which isolate | separates the circuit in the solar cell string 7 unit is installed.

  The power conditioner 9 is a device or means for converting DC power generated by the solar cell 2 into AC power.

  A second switch 11 is incorporated in the input portion of the power conditioner 9.

  The in-house distribution board 12 is a device or means for supplying AC power converted by the power conditioner 9 to in-house home appliances (not shown).

  FIG. 2 is a side view showing the configuration of the operation box of the photovoltaic power generation apparatus according to the first embodiment, and FIG. 3 is a front view showing the configuration of the first switch of the photovoltaic power generation apparatus according to the first embodiment. is there.

  The first switch 10 includes a switch 101 that electrically connects or disconnects the solar cell 2 and the power conditioner 9.

  A push button 102 is provided outside the connection box 8, and a rotation mechanism 103 is provided inside the connection box.

  The rotation mechanism 103 is provided so as to be able to contact and separate from the push button 102, and rotates within a predetermined angle range when the push button 102 contacts.

  Next, the operation will be described with reference to FIGS.

  When an operator presses the push button 102 in an emergency, the push button 102 comes into contact with the rotation mechanism 103, and the rotation mechanism 103 rotates within a predetermined angle range. The rotated rotating mechanism 103 hits the switch 101 and switches the switch 101 in a direction (downward direction in FIGS. 2 and 3) in which the solar cell 2 and the power conditioner 9 are electrically opened.

  As described above, according to the photovoltaic power generation apparatus according to the first embodiment, it is possible to operate the switch 101 of the first switch 10 from the outside of the junction box 8, and the solar battery 2 can be easily operated. The power conditioner 9 can be opened electrically.

  By electrically disconnecting between the connection box 8 and the power conditioner 9 having the largest amount of current, it is possible to reduce the risk of an electric shock from an operator even when a disaster such as a fire occurs.

  As shown in FIG. 3, according to the present embodiment, a plurality of switches 101 can be collectively operated.

  In addition, by having the rotation mechanism 103, the worker can easily operate the switch 101 of the first switch 10 by simply pressing the push button 102.

(Second Embodiment)
The configuration of the second embodiment will be described with reference to the drawings. In addition, the same part as 1st Embodiment is shown with the same code | symbol, and description is abbreviate | omitted. Hereinafter, a different part from 1st Embodiment is demonstrated.

  FIG. 4 is a side view showing the configuration of the operation box of the photovoltaic power generation apparatus according to the second embodiment, and FIG. 5 is a front view showing the configuration of the first switch of the photovoltaic power generation apparatus according to the second embodiment. is there.

  The second embodiment is different from the first embodiment in the junction box 8 and the first switch 10.

  The first switch 10 includes a switch 101 that electrically connects or opens the solar cell 2 and the power conditioner 9, and the switch 101 includes a switch cap 201 provided with a through hole at its end.

  The wire cable 202 passes through the through hole of the switch cap 201, and both ends are drawn to the outside of the connection box 8 in a direction (downward direction in FIGS. 4 and 5) to electrically open the solar cell 2 and the power conditioner 9. It is.

  The handling 203 is attached to both ends of the wire cable 202.

  Further, the wire cable 202 is protected by a protective cover 204.

  Next, the operation will be described with reference to FIGS.

  When an operator pulls down the handling 203 in an emergency, the switch 101 is switched to a direction in which the solar cell 2 and the power conditioner 9 are electrically opened via the wire cable 202 (downward direction in FIGS. 4 and 5).

  As described above, according to the solar power generation device according to the second embodiment, the switch 101 of the first switch 10 can be operated from the outside of the junction box 8, and the solar battery 2 can be easily operated. The power conditioner 9 can be opened electrically.

  By electrically disconnecting between the connection box 8 and the power conditioner 9 having the largest amount of current, it is possible to reduce the risk of an electric shock from an operator even when a disaster such as a fire occurs.

  As shown in FIG. 5, even when there are a plurality of first switches 10 in the junction box 8, they can be opened at the same time. In this case, the plurality of first switches 10 are not arranged horizontally. Also good.

  Moreover, since the rotation mechanism 103 in the first embodiment can be omitted, the junction box 8 can be made smaller than in the first embodiment.

(Third embodiment)
The configuration of the third embodiment will be described with reference to the drawings.

  FIG. 6 is a block diagram showing a configuration of a photovoltaic power generation apparatus according to the third embodiment.

  The solar power generation device 1 of this embodiment includes a solar cell 2, an anode cable 3, a cathode cable 4, a first anode connector 13, a first cathode connector 14, a connection box 8, a power conditioner 9, a first switch 10, An in-house distribution board 12 is provided.

  The solar cell 2 is a device or means for generating DC power from the light energy of sunlight.

  Anode cable 3 is electrically connected to the anode of solar cell 2, and cathode cable 4 is electrically connected to the cathode of solar cell 2.

  A first anode connector 13 is connected to the anode cable 3, and a first cathode connector 14 is connected to the cathode cable 4. The first anode connector 13 and the first cathode connector 14 are connected to each other to form a solar cell string 7 in which a plurality of solar cells 2 are connected in series.

  The connection box 8 parallelizes the plurality of solar cell strings 7 and connects them to the power conditioner 9.

  In the connection box 8, the 1st switch 10 which isolate | separates the circuit in the solar cell string 7 unit is installed.

  The power conditioner 9 is a device or means for converting DC power generated by the solar cell 2 into AC power.

  A second switch 11 is incorporated in the input portion of the power conditioner 9.

  The in-house distribution board 12 is a device or means for supplying AC power converted by the power conditioner 9 to in-house home appliances (not shown).

  An opening means 15 is provided between the solar cells 2.

  FIG. 7 is an explanatory diagram illustrating a configuration of an opening unit of the solar power generation device according to the third embodiment.

  The opening means 15 includes a first connection cable 301, a second cathode connector 302, a first connection connector 303, a second connection cable 304, a second anode connector 305, a second connection connector 306, an open box 309, a support column 310, a wire. A cable 311, a handling 312, a protective cover 313, and a third magnet 314 are included.

  A second cathode connector 302 is connected to one end of the first connection cable 301, and a first connection connector 303 is connected to the other end.

  A second anode connector 305 is connected to one end of the second connection cable 304, and a second connection connector 306 is connected to the other end.

  The second cathode connector 302 is connected to the first anode connector 13, and the second anode connector 305 is connected to the first cathode connector 14.

  The first connection connector 303 includes a first magnet 307 having conductivity inside, and similarly, the second connection connector 306 includes a second magnet 308 having conductivity inside.

  Normally, the first magnet 307 and the second magnet 308 are attracted to maintain the energized state.

  The first connection connector 303 and the second connection connector are housed in the open box 309, and a pair of support pillars 310 are provided in the open box 309 so as to sandwich the second connection cable 304.

  The wire cable 311 is attached to the second connection cable 304 so as to be positioned between the second connection connector 306 and the support column 310, and an end portion of the wire cable 311 is drawn out of the open box 309.

  The third magnet 314 is fixed in the open box 309 in the direction in which the wire cable 311 is pulled out as viewed from the second magnet 308.

  A handling 312 is attached to the end of the wire cable 311. Further, the wire cable 311 is protected by a protective cover 313.

  A pair of support columns 310 are provided in the open box 309 so as to sandwich the first connection cable 301, and the wire cable 311 is positioned between the first connection connector 303 and the support column 310. 301 may be attached.

  Next, the operation will be described with reference to FIG.

  When an operator pulls down the handling 312 in an emergency, the second connection cable 304 to which the wire cable 311 is attached bends downward with the support column 310 as a fulcrum, and the first magnet 307 and the second magnet 308 are separated. As a result, the connection between the solar cells 2 is released.

  At this time, the second magnet 308 separated from the first magnet 307 is attracted to the third magnet 314, and the open state is maintained.

  As described above, according to the photovoltaic power generation apparatus according to the third embodiment, the connection between the solar cells 2 can be easily opened, and the solar cell string 7 and the connection box 8 are electrically connected. Can be shut off. Thereby, even when a disaster such as a disaster occurs, it is possible to reduce the risk of electric shock of the worker.

(Fourth embodiment)
The configuration of the fourth embodiment will be described with reference to the drawings. Note that the same parts as those of the third embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, a different part from 3rd Embodiment is demonstrated.

  FIG. 8 is an explanatory diagram showing the configuration of the opening means of the photovoltaic power generation apparatus according to the fourth embodiment.

  The fourth embodiment is different from the third embodiment in the opening means 15.

  The opening means 15 includes a clothespin-like member 401, an open box 405, a wire cable 406, an operation handle 407, and a protective cover 313.

  The clothespin-like member 401 includes a first arm member 402, a second arm member 403, and an elastic member 404 and is housed in the open box 405.

  The end of the first anode connector 13 is fixed to one end 402 a of the first arm member 402, and the end of the first cathode connector 14 is fixed to one end 403 a of the second arm member 403.

  That is, both ends of the first anode connector 13 and the first cathode connector 14 connected to each other are sandwiched between one end 402 a of the first arm member 402 and one end 403 a of the second arm member 403.

  The other end 402 b of the first arm member 402 is fixed to the open box 405.

  The clothespin-like member 401 is configured such that the other end 402b of the first arm member 402 and the other end 403b of the second arm member 403 are attracted to each other so that the one end 402a of the first arm member 402 and the second arm member 403 The one end 403b is configured to be opened.

  An elastic member 404 is provided between the first arm member 402 and the second arm member 403, and normally, one end 402a of the first arm member 402 and one end 403a of the second arm member 403 are prevented from opening. Acts like The elastic member 404 is a spring, for example.

  The wire cable 406 is attached to the other end 403 b of the second arm member 403, stretched in the direction of the first arm member 402, and pulled out to the outside of the open box 405.

  An operation handle 407 is attached to the end of the wire cable 406, and the wire cable 406 is protected by a protective cover 313.

  FIG. 9 is an explanatory view showing the configuration of the operation handle in the opening means of the photovoltaic power generation apparatus according to the fourth embodiment.

  The operation handle 407 includes a handle portion 407a, a support portion 407b, a base portion 407c, and a stopper 407d.

  The end portion of the wire cable 406 is attached to the end portion of the handle portion 407a.

  The handle portion 407a is attached to the base portion 407c via the support portion 407b, and is rotatable at a predetermined angle in the direction of the base portion 407c with the support portion 407b as an axis.

  A stopper 407d is attached to the end of the base portion 407c, and the handle portion 407a is fixed at an arbitrary angle by the stopper 407d.

  Next, the operation will be described with reference to FIGS.

  When an operator grips the handle portion 407a of the operation handle 407 in an emergency, the wire cable 406 attached to the end portion of the handle portion 407a is pulled.

  At this time, the state where the wire cable 406 is pulled is held by the stopper 407d of the operation handle 407.

  Since the wire cable 406 is attached to the other end 403b of the second arm member 403 and is stretched in the direction of the first arm member 402 fixed to the open box 405, when the wire cable 406 is pulled, The other end 402b of the first arm member 402 and the other end 403b of the second arm member 403 are attracted.

  By pulling the other end 402b of the first arm member 402 and the other end 403b of the second arm member 403, one end 402a of the first arm member 402 and one end 403b of the second arm member 403 are opened, and the first The connection between the anode connector 13 and the first cathode connector 14 is also released.

  As described above, according to the photovoltaic power generation apparatus according to the fourth embodiment, the connection between the first anode connector 13 and the first cathode connector 14 that connect the solar cells 2 can be easily opened. The space between the solar cell string 7 and the connection box 8 can be electrically disconnected. Thereby, even when a disaster such as a disaster occurs, it is possible to reduce the risk of electric shock of the worker.

(Fifth embodiment)
The configuration of the fifth embodiment will be described with reference to the drawings. In addition, the same part as 3rd Embodiment and 4th Embodiment is shown with the same code | symbol, and description is abbreviate | omitted. Hereinafter, a different part from 3rd Embodiment and 4th Embodiment is demonstrated.

  FIG. 10 is an explanatory diagram showing the configuration of the opening means of the solar power generation device according to the fifth embodiment.

  The fifth embodiment is different from the third embodiment and the fourth embodiment in the opening means 15.

  The opening means 15 includes a first holding member 501, a second holding member 502, an elastic member 503, a wire cable 504, an opening box 505, an operation handle 407, and a protective cover 313.

  The 1st clamping member 501 and the 2nd clamping member 502 are accommodated in the open box 505, and the 1st clamping member 501 is equipped with the 1st tooth | gear 506 at one end. Similarly, the second holding member 502 includes second teeth 507 at one end. The first tooth 506 and the second tooth 507 are arranged to face each other, and the anode cable 3 and the cathode cable 4 are located between the first tooth 506 and the second tooth 507.

  The first teeth 506 and the second teeth 507 are made of metal, for example, and have conductivity.

  An elastic member 503 is provided between the first holding member 501 and the second holding member 502, and the first tooth 506 and the second tooth 507 normally connect the anode cable 3 and the cathode cable 4 by the elastic member 503. A predetermined interval is provided between the first teeth 506 and the second teeth 507 so as not to be pinched. The elastic member 503 is, for example, a spring.

  The other end of the first holding member 501 and the other end of the second holding member 502 are connected to each other and fixed to the open box 505 (fixing portion 508).

  The wire cable 504 is attached to the first holding member 501 (supporting point 509), stretched in the direction of the second holding member 502, and drawn out of the open box 505.

  An operation handle 407 is attached to the end of the wire cable 504, and the wire cable 504 is protected by a protective cover 313.

  Next, the operation will be described with reference to FIG.

  When an operator grips the handle portion 407a of the operation handle 407 in an emergency, the wire cable 504 attached to the end portion of the handle portion 407a is pulled.

  At this time, the state where the wire cable 406 is pulled is held by the stopper 407d of the operation handle 407.

  When the wire cable 504 is pulled, the first tooth 506 of the first holding member 501 moves in the direction of the second tooth 507 of the second holding member 502 from the fixing portion 508, and the first tooth 506 and the second tooth The anode cable 3 and the cathode cable 4 are sandwiched by 507. As a result, the solar cells 2 are short-circuited.

  For example, when the first sandwiching member 501 and the second sandwiching member 502 are installed at an intermediate position of the solar cell string 7, the solar cells 2 are short-circuited, so that the solar cell strings 7 in the connection box 8 The voltage is halved.

  Similarly, the voltage of the solar cell string 7 in the junction box 8 is reduced to one third by equally dividing the circuit at two locations of the solar cell string 7 and setting the short circuit state.

  As described above, according to the solar power generation device according to the fifth embodiment, the voltage of the solar cell string 7 can be reduced by setting the solar cells 2 in a short-circuited state. Thereby, even when a disaster such as a disaster occurs, it is possible to reduce the risk of electric shock of the worker.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example 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 scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof in the same manner as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Solar power generation device 2 ... Solar cell 3 ... Anode cable 4 ... Cathode cable 5 ... Anode connector 6 ... Cathode connector 7 ... Solar cell string 8 ... Connection box 9 ... Power conditioner 10 ... 1st switch 11 ... 2nd Switch 12 ... Home distribution board 13 ... First anode connector 14 ... First cathode connector 15 ... Opening means 101 ... Switch 102 ... Push button 103 ... Rotating mechanism 201 ... Switch cap 202, 311 ... Wire cables 203, 312 ... Handling 204 ... Protective cover 301 ... First connection cable 302 ... Second cathode connector 303 ... First connection connector 304 ... Second connection cable 305 ... Second anode connector 306 ... Second connection connector 307 ... First magnet 308 ... Second magnet 309, 405, 505 ... Open box 310 ... Supporting pillar 313 ... Protective cover 401 ... Clothespin Material 402 ... first arm member 403 ... second arm member 404, 503 ... elastic member 406,504 ... wire cable 407 ... operation handle 407a ... handle portion 407b ... support portion 407c ... base portion 407d ... stopper 501 ... first holding Member 502 ... Second clamping member 506 ... First tooth 507 ... Second tooth

Claims (7)

A plurality of solar cells connected in series and generating DC power;
A power conditioner that converts DC power generated by the solar cell into AC power;
A switch provided between the solar cell and the power conditioner, and comprising a switch for electrically connecting or opening the solar cell and the power conditioner;
A junction box for storing the switch;
A solar power generation apparatus comprising: switching means for switching the switch in a direction to electrically open the solar cell and the power conditioner from the outside of the connection box. The switching means is
A push button provided outside the connection box;
It is provided inside the junction box so as to be able to come into contact with and separate from the push button, and rotates in a predetermined angle range when the push button comes into contact with the direction in which the solar cell and the power conditioner are electrically opened. The solar power generation device according to claim 1, further comprising a rotation mechanism that switches the switch. The switching means is
A wire cable provided at the switch, with both ends drawn out of the junction box in a direction to electrically open the solar cell and the power conditioner;
The solar power generation device according to claim 1, further comprising a handling attached to the both ends of the wire cable. A plurality of solar cells for generating DC power;
An anode cable electrically connected to the anode of the solar cell;
A cathode cable electrically connected to the cathode of the solar cell;
A first anode connector connected to the anode cable;
A first cathode connector connected to the cathode cable and connecting the plurality of solar cells in series with the anode connector;
A power conditioner that converts DC power generated by the solar cell into AC power;
A solar power generation apparatus comprising: an opening unit that opens a connection between the solar cells. The opening means is
A second cathode connector connected to the first anode connector;
A second anode connector connected to the first cathode connector;
A first connection cable having one end connected to the second cathode connector;
A second connection cable having one end connected to the second anode connector;
A first connection connector including a first magnet connected to the other end of the first connection cable and having conductivity therein;
A second connection connector that is connected to the other end of the second connection cable, has conductivity inside, and includes a second magnet that is attracted to the first magnet;
A wire cable attached to the first connection cable or the second connection cable;
The solar power generation device according to claim 4, further comprising a handling attached to an end of the wire cable. The opening means is
A first arm member and a second arm member housed in an open box are provided, and both ends of the first anode connector and the first cathode connector connected to each other are connected to one end of the first arm member or the second arm member. A clothespin fixed to one end and sandwiched between one end of the first arm member and one end of the second arm member, and the other end of the first arm member fixed to the open box A member,
A wire cable attached to the other end of the second arm member and stretched in the direction of the first arm member;
The solar power generation device according to claim 4, further comprising an operation handle that is attached to an end portion of the wire cable and includes a stopper that holds the wire cable in a pulled state. The opening means is
A first clamping member comprising first teeth at one end;
The second teeth are disposed opposite to the first teeth and the anode cable and the cathode cable are positioned between the first teeth and the other end is connected to the other end of the first holding member. A second clamping member to be
An elastic member provided between the first clamping member and the second clamping member, and providing a predetermined interval between the first tooth and the second tooth;
A wire cable attached to the first clamping member and stretched in the direction of the second clamping member;
The solar power generation device according to claim 4, further comprising an operation handle that is attached to an end portion of the wire cable and includes a stopper that holds the wire cable in a pulled state.

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