JP2018143027A - Solar power generation system and ac power collecting box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize to "prevent an influence on a whole power generation system" by, for example, setting up breakers that can block a cable way at a plurality of locations between a transducer and a transformer.SOLUTION: A power generation system 1 comprises: a transducer 2 for converting direct current sent from a power generator B to alternating current; and a transformer 3 for transforming the voltage of the alternating current from the transducer 2. A breaker 6 that can block a cable way 4 at a plurality of blocking points 5 is set up in at least one cable way 4 of all the cable ways 4 that flow the alternating current between the transducer 2 and the transformer 3. A housing box 10 comprises: a box body 11 for accommodating the breaker 6 etc.; a box door 12 for opening and closing an aperture 11a of the box body 11; and a rotation axis 13 around which the box door 12 is rotated. As for the housing box, the breaker 6 etc. are placed near the rotation axis 13 in the box body 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a conversion unit that converts a direct current from a power generation unit into an alternating current, a power generation system (such as a solar power generation system) having a transformer that transforms the voltage of the alternating current from the conversion unit, and a box body. The present invention relates to a box door that opens and closes an opening of a box body and a storage box (such as an AC current collection box) having a pivot shaft that rotates the box door.

2. Description of the Related Art Conventionally, a system interconnection device that supplies generated power such as solar power to an existing high-voltage power system is known (see Patent Document 1).
This system interconnection device includes an inverter that converts generated DC power into AC power and a power conditioner having a reactor, a step-up transformer that converts AC power output from the power conditioner into high-voltage power, A circuit breaker disposed between the step-up transformer and the existing high-voltage power system is provided, and the power conditioner, the step-up transformer, and the circuit breaker are disposed in the same housing.

JP 2013-143784 A

However, since the system interconnection device described in Patent Document 1 includes a circuit breaker only between the step-up transformer and the high-voltage power system, it is assumed that a mega solar (large size) in which a large number of solar cells are installed in a wide area. Even if a power conditioner (conversion unit) is installed far away from the step-up transformer in a scaled solar system, an abnormal overcurrent is caused only by the overload (lightning strike, etc.) or short circuit around the power conditioner. When the current flows, the entire system including the power transformer below the step-up transformer is stopped.
By shutting down the entire system, there is no cause for overcurrent or the like, and even the power generation by the power conditioner that should have been able to generate power is lost, and the power that can be sold from the grid interconnection device is reduced.

In the first place, in the system interconnection device of Patent Document 1, the power conditioner (conversion unit) is arranged in the same casing as the step-up transformer and the circuit breaker, so that it is located far away from the step-up transformer. A power conditioner cannot be installed, and large-scale power generation cannot be performed by installing large amounts of solar cells over a wide area.
Furthermore, in the system interconnection device of Patent Document 1, as shown in FIGS. 1 and 3, a direct connection from a solar cell or the like to a power conditioner (conversion unit) in the same housing is performed by an electric wire (cable). Therefore, in the case of a large-scale photovoltaic power generation system, a large amount of cables from distant solar cells, etc. are bulky, and an extra voltage drop is generated by this bulky cable, reducing power generation efficiency. To do.

In view of such a point, the present invention is provided with a breaker capable of interrupting the electric circuit between the conversion unit and the transformer at a plurality of locations, thereby preventing overcurrent “preventing the influence on the entire power generation system” and attaching a transformer. An object of the present invention is to provide a power generation system that realizes "breaker installation on the power generation unit side (side)" by arranging a conversion unit outside the casing.
Another object of the present invention is to provide a storage box that realizes "reduction of cable amount, suppression of voltage drop" and the like by disposing a breaker or the like in the storage box close to the rotation axis of the door. .

A power generation system 1 according to the present invention is a power generation system having a plurality of conversion units that convert a direct current from a power generation unit into an alternating current, and a transformer that transforms the voltage of the alternating current from the plurality of conversion units. The first feature is that a breaker is disposed in at least one electric circuit among the electric circuits through which an alternating current flows between each of the converters and the transformer so that the electric circuit can be interrupted at a plurality of interruption points. To do.
In addition, the “electric circuit” in the present invention flows electricity, and includes conductors such as copper, aluminum, silver, gold, and nichrome, cables in which the conductors are covered with an insulator, and general electric wires. .

  The second feature of the power generation system 1 according to the present invention is that, in addition to the first feature, the uppermost breaker capable of shutting off the uppermost shut-off location closest to the transformer among the plurality of shut-off locations in each of the electric circuits. Is housed in the uppermost casing, and a plurality of interruption points in each of the electric circuits are defined as nth (n = 2 or more natural number) stage interruption points in order from the transformer except for the uppermost interruption point. The n-th stage breakers capable of blocking these n-th stage blocking points are accommodated in the n-th case at the same level and every predetermined number.

  A third feature of the power generation system 1 according to the present invention is that, in addition to the second feature, the transformer is attached to the uppermost housing side, and each of the converters is provided outside the uppermost housing. It is in the point where it is arranged.

  A fourth feature of the power generation system 1 according to the present invention is a power generation system having a conversion unit that converts a direct current from the power generation unit into an alternating current, and a transformer that transforms the voltage of the alternating current from the conversion unit. Thus, the conversion unit is arranged outside the casing to which the transformer is attached.

  A fifth feature of the power generation system 1 according to the present invention is that, in addition to the second or third feature, the n-th housing includes a box body that houses the n-th breaker, and the box body. A box door that opens and closes the opening of the box, and a pivot shaft that pivots the box door and is attached to the box body, and the n-th stage breaker is close to the pivot axis inside the box body. Is located at the point.

By these features, by disposing a breaker 6 that can be interrupted at a plurality of interrupting points 5 in at least one electric circuit 4 among the electric circuits 4 between each conversion unit 2 and the transformer 3, unlike Patent Document 1, When the conversion unit 2 is provided at a position far away from the transformer 3 in a power generation system such as a mega solar (large-scale solar) using the power generation unit (solar cell, etc.) B in a large amount and a wide area, the conversion unit Even if an abnormal overcurrent flows due to an overload (lightning strike, etc.) or a short circuit only in the vicinity of 2, only the converter 2 below the breaker 6 or the power generation unit B stops, the transformer 3 or below and other converters 2 etc. Most of the entire system does not stop ("Preventing the impact on the entire power generation system").
Therefore, the entire power generation system 1 does not stop, and even if some of the conversion units 2 and the power generation units B are stopped, it is possible to sell power from the other conversion units 2.
Here, it can be said that the power generation system 1 is a “solar power generation system” if the power generation unit B is a solar cell.

Further, the uppermost breaker 6A capable of interrupting the uppermost cutoff point 5A closest to the transformer 3 in the electric circuit 4 is accommodated in the uppermost housing 7A, and the nth interruption point (the second stage interruption point 5B, etc.) in the electric circuit 4 is accommodated. By accommodating n-stage breakers (second-stage breakers 6B, etc.) that can be shut off in the n-th casing (second-stage casing 7B, etc.) at the same level and every predetermined number, In contrast, in the large-scale power generation system, the second-stage breaker 6B and the like housed in the second-stage housing 7B and the like are provided on the conversion unit 2 side (side) that is provided far from the transformer 3 ("Breaker installation on the converter side").
Accordingly, the cables (electric circuit) from the power generation unit B are once bundled in the second-stage casing 7B and the like every predetermined number, and one cable from the second-stage casing 7B and the like to the uppermost casing 7A. (If a cable is directly connected from the conversion unit to the uppermost housing as in Patent Document 1, the number of cables is required for the number of conversion units, but the present invention only requires one). In addition to greatly reducing the amount, the voltage drop can be suppressed by the amount of the reduced cable ("Reducing the amount of cable and suppressing the voltage drop").

Furthermore, by attaching the transformer 3 to the uppermost casing 7A side and disposing the conversion unit 2 outside the uppermost casing 7A, AC is easier to wire for longer distances than direct current. In contrast, the power generation system 1 can be provided on a large scale by providing the conversion unit 2 at a position far away from the transformer 3.
The power generation system 1 is a power generation system 1 having a conversion unit 2 that converts a direct current from the power generation unit B into an alternating current and a transformer 3 that transforms the voltage of the alternating current from the conversion unit 2. The conversion unit 2 may be disposed outside the housing 7A to which the transformer 3 is attached.

Then, the n-th stage breaker (second stage breaker 6B, etc.) is accommodated inside the box body 11 of the n-th stage casing (second stage casing 7B, etc.), so that the conversion section 2 side (side) is Naturally, the second-stage breaker 6B or the like can be provided on the conversion unit 2 side only by providing the two-stage housing 7B or the like ("breaker installation on the conversion unit side").
At the same time, by disposing the second-stage breaker 6B and the like closer to the rotation shaft 13 inside the box body 11 such as the second-stage housing 7B, the box body 11 is placed on the side opposite to the rotation shaft 13. It becomes possible to secure a space, and if the connection terminals of the cables from the conversion unit 2 to the second-stage breaker 6B and the like are concentrated in this space, the conversion units ( The number of second-stage breakers 6B, etc.) increases, and further "reduction of cable amount and suppression of voltage drop" can be achieved.
Since the current flowing from the conversion unit 2 to the second stage breaker 6B and the like is of course an alternating current, the second stage breaker 6B and the like is an “AC breaker (AC circuit breaker)”. It can be said that the second-stage housings 7B and the like that accommodate the predetermined number between the converter 2 and the transformer 3 (intermediate) are “AC current collection boxes (intermediate current collection boxes)”.

  A storage box 10 according to the present invention is a storage box having a box body, a box door that opens and closes the opening of the box body, and a rotating shaft that rotates the box door and is attached to the box body. A breaker capable of interrupting current from outside the storage box and a current collector for collecting current from outside the storage box are housed inside the box body, and the breaker and the current collector are connected to the box. The first feature is that it is disposed closer to the rotation shaft inside the main body.

  A second feature of the storage box 10 according to the present invention is that, in addition to the first feature, the current collector has a longitudinal direction at a position farther from the opening of the box body than the breaker, and the collected current A plurality of electric circuit bodies for supplying current, and provided with connection terminals with power transmission lines for supplying current to the outside of the housing box at the same end of each of the electric circuit bodies. Each of them is provided with a portion that does not overlap each other.

A third feature of the storage box 10 according to the present invention is that, in addition to the first or second feature, the pivot shaft is a shaft support member that can be retrofitted to the box body, and the shaft support member and the box. A shaft that penetrates both doors is provided, and the shaft is located above the opening of the box body and extends in a substantially horizontal direction.
A fourth feature of the storage box 10 according to the present invention includes a box body, a box door that opens and closes the opening of the box body, and a pivot shaft that rotates the box door and is attached to the box body. The rotating shaft includes a shaft support material that can be retrofitted to the box body, and a shaft body that penetrates both the shaft support material and the box door, and the shaft body includes the box It exists in the point which is located above the opening of a main body and is extended in the substantially horizontal direction.
In the present invention, “front and rear” means that the opening 11a side of the box body 11 is “front”, and the side away from the opening 11a is “rear”.
Further, “up and down” in the present invention means that the direction in which an object falls due to gravity (side approaching the earth) when the storage box 10 is installed is “down”, and the direction opposite to the direction in which the object falls due to gravity ( The side away from the earth is “up”.
Furthermore, “left and right” in the present invention means that the left hand side when the box body 11 faces from “front” to “rear” is “left”, and the right hand side when it goes from “rear” to “front”. “Right”.

By accommodating the breaker 6 and the current collector 14 inside the box main body 11 due to these characteristics, if this storage box 10 itself is provided, for example, on the side of the conversion unit 2 or the power generation unit B (side), Naturally, the breaker 6 and the current collector 14 can be provided on the conversion unit 2 side.
By disposing the breaker 6 and the current collector 14 close to the rotation shaft 13 inside the box body 11, it becomes possible to secure a space on the opposite side of the rotation shaft 13 inside the box body 11. If the connection terminals of the cables from the conversion unit 2 etc. to the breaker 6 etc. are concentrated in the space, the number of breakers 6 etc. collected in one storage box 10 will increase, and “reduction of cable quantity and suppression of voltage drop” Can be planned.
If the current from the outside of the storage box 10 is an alternating current from the converter 2, the breaker 6 is an “AC breaker”, and the storage box 10 that houses this AC breaker is an “AC current collection box”. It can also be said.

Further, by providing a connection terminal 17 with the power transmission path 16 at the end of each electrical path body 15 farther from the opening 11a of the box body 11, the electrical path body 15 of the current collector 14 is covered with the breaker 6 in front view. Therefore, the electric circuit body 15 is not exposed, and the possibility that the user contacts the electric circuit body 15 of the current collector 14 when performing a shut-off operation or the like can be eliminated.
By providing the connection terminal 17 with portions that do not overlap each other in both front and side views, the user can easily connect to the respective electric path bodies 15 so that the respective power transmission paths 16 do not contact each other.

Further, the rotation shaft 13 is configured by a hinge or the like by using a shaft support member 18 that can be retrofitted to the box body 11 and a shaft body 19 that penetrates both the shaft support member 18 and the box door 12. Compared to the rotating shaft 13, the box body 11 and the box door 12 can be easily welded.
By making the shaft body 19 substantially horizontal above the opening 11 a of the box body 11, the box door 12 is opened upward and the breaker 6 and the current collector 14 are disposed upward in the box body 11. 11, a space can be secured below the interior, and the connection terminals of the cable can be concentrated in this space, and the cable can be easily routed straight from the bottom to the outside of the storage box 10 along the gravity. The number of breakers 6 and the like collected in the box 10 is further increased, and “cable reduction and voltage drop suppression” can be further achieved.

According to the power generation system according to the present invention, a breaker capable of interrupting the electric circuit between the conversion unit and the transformer at a plurality of locations is arranged to prevent “influence on the entire power generation system”, and the conversion unit outside the housing to which the transformer is attached. To implement “breaker installation on the converter side”.
In the storage box according to the present invention, a breaker or the like is disposed in the storage box close to the rotation axis of the door to realize “reduction of cable amount, suppression of voltage drop” or the like.

1 is a schematic diagram showing a power generation system according to the present invention. It is a front perspective view which shows the storage box (nth stage housing | casing, alternating current collection box) which concerns on this invention. It is a left view which shows the state which closed the box door of the storage box. It is a right view which shows the state which opened the box door of the storage box. FIG. 3 is a cross-sectional view taken along the line XX in FIG. It is a front view which shows the modification 1 (connection box) of the storage box which concerns on this invention. It is a left view which shows the state which closed the box door of the modification 1. It is a right view which shows the state which opened the box door of the modification 1. FIG. 7 is a YY arrow view in FIG. It is a front view which shows the modification 2 (connection box) of the storage box which concerns on this invention.

Embodiments of the present invention will be described below with reference to the drawings.
<Overall configuration of power generation system 1>
As shown in FIGS. 1 to 5, the power generation system 1 according to the present invention includes a plurality of conversion units 2 that convert a direct current from the power generation unit B into an alternating current, and an alternating current from the plurality of conversion units 2. A transformer 3 for transforming the voltage of

In the power generation system 1, a breaker 6 is disposed in at least one electric circuit 4 of the electric circuits 4 that allow an alternating current to flow between each of the conversion units 2 and the transformer 3 so that the electric circuit 4 can be interrupted at a plurality of interruption points 5. Has been.
Further, the power generation system 1 may have a configuration in which the conversion unit 2 is not provided with the plurality of conversion units 2 described above, and the conversion unit 2 is disposed outside the casing 7 (the uppermost casing 7A) to which the transformer 3 is attached. .
Here, the power generation unit B that supplies a direct current to the conversion unit 2 described above will be described below.

<Power generation part B>
As shown in FIG. 1, the power generation unit B corresponds to a solar cell in the solar power generation system 1, and a plurality (for example, 5 to 20) of the solar cells B are connected in series. A solar cell string S is configured.
Each solar cell B generates direct-current power between the positive electrode (+ electrode) and the negative electrode (−electrode) when irradiated with light, and the average generated power is about 100 to 300 W (for example, 250 W). ).
Since the solar cell strings S to which such solar cells B are connected are connected in parallel to a connection box 10 ′ described later for each of a plurality (for example, 5 to 20), the solar cell strings S of each solar cell string S are connected. The voltage between the power output terminal (+ pole) and the ground terminal (− pole) is the same, and is about 0.5 to 6 kW.

The shape of the solar cell B is not particularly limited, but may be, for example, a panel shape.
In addition, the power generation unit B may be a generator such as a motor that is rotated by wind power, hydraulic power, wave power, or the like.
Hereinafter, the power generation unit B will be described as being mainly a solar cell B.

<Conversion unit 2>
As shown in FIG. 1, the converter 2 converts the direct current from the solar battery B into an alternating current (for example, 440 V, 100 to 200 V, etc., hereinafter referred to as “low voltage alternating current L”) and A control unit for controlling the AC voltage and frequency converted by the inverter device, an air circuit breaker (ACB), and the like are provided.
The inverter device, the control unit, the circuit breaker, and the like are disposed in a conversion casing, and the conversion casing is provided with a rotating fan-like air blowing unit that releases air inside the conversion casing.

Such a conversion unit 2 is also called a power conditioner (abbreviation of power conditioner).
A plurality of conversion units 2 may be arranged outside a case 7 (the uppermost case (panel case) 7A) described later. A master box for collectively controlling the plurality of conversion units 2 is: It may be provided inside the panel housing 7A.
Hereinafter, the conversion unit 2 is assumed to be disposed outside the housing 7 (the uppermost housing 7A) (for example, inside a casing (housing) provided near the power generation unit B). To state.

<Transformer 3>
As shown in FIG. 1, the transformer 3 converts the low-voltage AC current L (for example, 440 V or 100 to 200 V) from the conversion unit 2 into a high-voltage AC current (for example, 22000 V or 6600 V) suitable for power transmission. Hereinafter referred to as “high-voltage AC current H”).
The transformer is an abbreviation for transformer.

As described above, the transformer 3 may be attached to the uppermost casing 7A. In this case, the transformer 3 is attached to the uppermost casing 7A from the outside (for example, the right side) from the outside. .
The transformer 3 includes a substantially rectangular parallelepiped main body, a radiator attached to the side of the main body, and two connection covers (upper connection cover and side connection cover) provided on the upper and left sides of the main body. May be.

The radiator releases heat accumulated in the cooling medium for cooling the transformer 3 to the outside of the transformer 3 (dissipates heat). Mineral oil or gas (non-combustible) having insulating performance is used as the cooling medium. It is done.
The radiator may be cooled by natural convection of the cooling medium, or may be provided with a cooling fan or the like. If the cooling medium is a gas, a meter for managing the pressure may be attached.
Moreover, the transformer 3 may have a radiation fin instead of the radiator.

Among the connection covers, the upper connection cover covers a connection portion (low voltage connection terminal) between the electric circuit 4 (hereinafter referred to as “low voltage AC electric circuit 4L”) through which the low voltage AC current L from the conversion unit 2 flows and the transformer 3. .
The specific structure of the upper connection cover may be any, and may be a structure in which the upper cover peripheral portion remains even after removal. Further, a plurality of (for example, three, six, etc., three-phase) low-voltage AC circuits 4L may be gathered as a bundle to form a low-voltage bundle.

On the other hand, among the connection covers described above, the side connection cover is a connection between the transformer 3 and the electric circuit 4 (hereinafter referred to as “high-voltage AC electric circuit 4H”) that causes the high-voltage AC current H to flow from the transformer 3 to the power transmission unit 21 described later. Cover the part (high-voltage connection terminal).
The specific configuration of the side connection cover may be any. Also, a plurality of (for example, three, six, etc., three-phase) high-voltage AC circuits 4H may be gathered as a bundle to form a high-voltage bundle.

With such a configuration, the low-voltage AC circuit 4L is connected to the transformer 3 from above, and the high-voltage AC circuit 4H is connected to the transformer 3 from the side.
Further, as shown in FIG. 4, for the low-voltage AC circuit 4L (low-voltage bundle) and the high-voltage AC circuit 4H (high-voltage bundle) described so far, the low-voltage AC circuit 4L is longer than the high-voltage AC circuit 4H (in other words, The high-voltage AC circuit 4H may be shorter than the low-voltage AC circuit 4L).

<Electric circuit 4, breaking point 5, breaker 6>
As shown in FIG. 1, when there are a plurality of conversion units 2, the electric circuit 4 (low voltage AC circuit 4 </ b> L) naturally has a low voltage AC circuit 4 </ b> L that allows a low voltage AC current L to flow between each of the conversion units 2 and the transformer 3. There will be more than one.
Of these plurality of low voltage AC circuits 4L, at least one (one) low voltage AC circuit 4L is provided with a breaker 6 so that the circuit 4L can be blocked at a plurality of blocking points 5.

In other words, all of the low-voltage AC circuits 4L included in the power generation system 1 may be provided with a plurality of interrupting points 5 and breakers 6, or only one low-voltage AC circuit 4L among all the low-voltage AC circuits 4L. The interruption | blocking location 5 and the breaker 6 may be provided.
Of the plurality of blocking points 5 in each of the low-voltage AC circuits 4L, the blocking point 5 closest to the transformer 3 is defined as the uppermost blocking point 5A.

Hereinafter, in a plurality of interrupting points 5 in each of the low-voltage AC circuits 4L, the nth (n = 2 or more natural number) stage breaking points 5B, 5C, 5D,. And
More specifically, in the plurality of cutoff points 5 in each low-voltage AC circuit 4L, the cutoff point 5 that is closest to the transformer 3 next to the uppermost cutoff point 5A is defined as a second-stage cutoff point 5B.
Similarly, in the plurality of interruption points 5 in each low-voltage AC circuit 4L, the interruption point 5 closest to the transformer 3 next to the second-stage interruption point 5B is defined as a third-stage interruption point 5C, and a plurality of interruption points 5 in each low-voltage AC circuit 4L are provided. In the shut-off location 5 of FIG. 5, the shut-off location 5 next to the transformer 3 next to the third-stage shut-off location 5C is defined as a fourth-stage shut-off location 5D, and the following shut-off locations 5 are in turn the fifth-stage shut-off location 5E and the sixth stage. It becomes the interruption | blocking location 5F, the 7th step | paragraph interruption location 5G ....

The same applies to the breaker 6. Of the plurality of breakers 6 in each of the low-voltage AC circuits 4L, the breaker 6 closest to the transformer 3 is defined as the uppermost breaker 6A.
Hereinafter, in the plurality of breakers 6 in each of the low-voltage AC circuits 4L, the n-th (n = 2 or more natural number) stage breakers 6B, 6C, 6D,.

More specifically, in the plurality of breakers 6 in each low-voltage AC circuit 4L, the breaker 6 next to the transformer 3 next to the uppermost breaker 6A is defined as a second breaker 6B.
Similarly, in the plurality of breakers 6 in each low-voltage AC circuit 4L, the breaker 6 next to the transformer 3 next to the second-stage breaker 6B is the third-stage breaker 6C, and in the plurality of breakers 6 in each low-voltage AC circuit 4L. The breaker 6 next to the transformer 3 next to the third-stage breaker 6C is a fourth-stage breaker 6D, and the following breakers 6 are in turn, a fifth-stage breaker 6E, a sixth-stage breaker 6F, a seventh-stage breaker 6G, and so on. Become.

<Details of breaker 6>
As shown in FIGS. 1 to 5, the breaker 6 is an electric device capable of interrupting a current flow, and is also called a circuit breaker (MCCB (MCB)).
The breaker 6 has a casing (outer shell) 6a covered with a synthetic resin box, and a handle 6b for manually turning on / off the power is provided on the front surface. The breaker 6 may incorporate a tripping mechanism and an arc extinguishing device.

When the breaker 6 performs an interruption operation due to an abnormal overcurrent or the like, the handle 6b stops at an intermediate position between ON and OFF, or stops at an OFF position.
The casing 6a of the breaker 6 is provided with a cut-off connection part (cut-off connection terminal) 6c for connecting the low-voltage AC circuit 4L at its end (upper end, lower end, etc.), and the cut-off connection part 6c is closer to the conversion part 2 The side connecting the low-voltage AC circuit 4L from the power source side (primary side) and the side connecting the low-voltage AC circuit 4L from the side closer to the transformer 3 as the load side (secondary side).
In the low-voltage AC circuit 4L, the power supply side is the primary low-voltage AC circuit 4L ′ and the load side is the secondary-side low-voltage AC circuit 4L ″ with the breaker 6 interposed therebetween.

There are no particular limitations on the number of breaking connection portions 6c in one breaker 6 as long as the low-voltage AC circuit 4L can be blocked, but depending on the low-voltage AC circuit 4L, three (3) Poles), four (four poles) for a three-phase four-wire system, or two (two poles) for a single-phase two-wire system.
That is, the breaker 6 is an “AC breaker”.
If the breaker 6 is disposed inside a casing 7 (the uppermost casing (panel casing) 7A, the second-stage casing, etc. 7B, 7C, 7D... (Container box 10)) described below, Although it can be said that there is no limitation, in particular, in the storage box 10 that is the second-stage housing 7B, 7C, 7D..., The breaker 6 uses a breaker base (pedestal) 6d described below to collect the current collector 14 described later. Further, it is provided on the side closer to the opening 11a of the box body 11 (in other words, the current collector 14 is provided at a position farther from the opening 11a of the box body 11 than the breaker 6).

<Breaker stand 6d>
As shown in FIGS. 2 to 5, the breaker base 6 d may have any configuration as long as the breaker 6 is provided closer to the opening 11 a of the box body 11 than the current collector 14. A plate body bent in a substantially U shape or the like may be used.
Therefore, the following describes a case where the breaker base 6d is a bent plate.

The breaker base 6d is composed of a single plate, which has a substantially rectangular support plate that abuts the inner bottom surface of the storage box 10 and the like, and leg portions that extend from the upper and lower ends of the support plate, respectively. And an attachment piece formed by bending the tip end of each leg.
With respect to the support plate, each leg portion is bent to the front surface (the opening 11a side of the box body 11), and the bending angle is approximately 90 °. By bending in this way, it can be said that the support plate and each leg portion are substantially U-shaped in a side view.

For each leg, each mounting piece is folded inward in a substantially U-shape, and the folding angle is also approximately 90 °. By bending in this way, the leg and the mounting piece are substantially in side view. It can be said that it is L-shaped.
That is, the breaker base 6d has an opening between the upper and lower mounting pieces, and a member of the current collector 14 described later can be easily installed inside the breaker base 6d through the opening.

The breaker 6 is covered so as to cover the current collector 14 provided inside the breaker base 6d from the front side (upper side), and the breaker 6 is attached via each mounting piece of the breaker base 6d.
Therefore, the breaker 6 is fixed to the front side (upper side) of the breaker base 6d, and the breaker 6 is disposed closer to the opening 11a of the box body 11 than the current collector 14.

<Case 7>
1-5, the housing | casing 7 accommodates the breaker 6 mentioned above in the inside, and may have multiple in one electric power generation system 1. As shown in FIG.
Of the plurality of housings 7, the housing 7 that houses the uppermost circuit breakers 6 </ b> A closest to the transformer 3 is referred to as the uppermost housing 7 </ b> A.

Hereinafter, in the plurality of casings 7, except for the uppermost casing 7 </ b> A described above, the casings 7 that accommodate the above-described n-th stage breakers 6 </ b> B, 6 </ b> C, 6 </ b> D. The n-th (n = 2 or more natural number) stage casings 7B, 7C, 7D,.
More specifically, in the plurality of casings 7, only the second-stage breakers 6B are accommodated every predetermined number, and the casing 7 that is closest to the transformer 3 next to the uppermost casing 7A is the second-stage casing 7B. And

Similarly, in the plurality of casings 7, only the third stage breakers 6C are accommodated for every predetermined number, and the casing 7 next to the transformer 3 after the second stage casing 7B is defined as a third stage casing 7C. In the plurality of casings 7, only the fourth stage breakers 6D are accommodated in predetermined numbers, and the casing 7 close to the transformer 3 next to the third stage casing 7C is defined as a fourth stage casing 7D. The body 7 is, in order, a fifth stage casing 7E, a sixth stage casing 7F, a seventh stage casing 7G,.
The predetermined number of the uppermost breakers 6A and the predetermined number of the nth stage breakers described so far are one or more.

<Uppermost casing (panel casing) 7A>
As shown in FIG. 1, the uppermost casing 7 </ b> A is the casing 7 in which the above-mentioned number of uppermost breakers 6 </ b> A are accommodated, and may be formed in a substantially rectangular parallelepiped shape, for example. good.
Inside the uppermost casing 7A, a power collecting section 14 (current collecting board 14 ') and a power transmitting section (power transmitting board) 21 which will be described later may be accommodated. It can also be said to be a body 7A.

The current collector 14 'in the panel housing 7A collects the low-voltage AC current L from the second-stage housing 7B (container box 10) outside the panel housing 7A. Although there is no particular limitation, for example, a plurality of breakers 6 arranged in the vertical direction in the panel housing 7A may be arranged in a pair of left and right.
Such a current collector 14 'collects the low-voltage AC current L and can be said to be an "AC current collector".

<Power transmission unit 21>
The power transmission unit 21 is located on the side closest to the transformer 3 inside the above-described panel casing 7A, and includes a vacuum circuit breaker (VCB), a lightning arrester (SAR), and the like.
In the power transmission unit 21, the high-voltage AC current H sent from the transformer 3 through the high-voltage AC circuit 4 </ b> H is connected to the power distribution cable G through the power distribution connection terminal after passing through the above-described VCB and the like.

The power transmission unit 21 is directly connected to the outside of the panel casing 7A via the distribution cable G (in particular, when boosted to 22000 V by the transformer 3), or from the plurality of power generation systems 1 Any configuration may be used as long as it is finally connected to the power distribution network N and can transmit power, such as connecting to the power distribution network N via another power transmission panel that collects and transmits power.
Note that the power transmission unit 21 can be said to be the special height unit 21 in the case of transmitting extra high voltage power (for example, 22000 V or the like).

In addition, in the inside of the panel casing 7A, there are an uninterruptible power supply (UPS), an air conditioner that circulates the air in the panel casing 7A, an auxiliary machine that supplies current to the above-described conversion unit 2, UPS, air conditioner, etc. You may have.
Note that a current (voltage having a voltage lower than the high-voltage AC current H) before the voltage is transformed (boosted) by the transformer 3 flows through the UPS, the air conditioner, the auxiliary machine, and the like, like the conversion unit 2.

Therefore, it can be said that the space (part) where the UPS, the air conditioner, the auxiliary machine, and the like are arranged is a low pressure part (low pressure panel).
Further, for example, a transformer 3 may be attached to the side surface of the panel housing 7A from the outside, and an openable / closable door may be provided on the front surface of the panel housing 7A.

<N-th casing 7B, 7C, 7D ..., storage box 10>
As shown in FIGS. 1 to 5, the n-th casings 7B, 7C, 7D,... Have n-stage breakers 6B, 6C, 6D,. It is a housing (box) 7 that is housed, and can also be referred to as a housing box 10.
In the following description, the breaker 6 and the casing 7 are mainly described as being in the second stage, but the same configuration is applied to any n-th stage casing such as the third-stage casing 7C and the fourth-stage casing 7D. May have.

<Details of storage box 10>
The storage box 10 that is the second-stage housing 7B includes a box body 11 that houses the breaker 6 that is the second-stage breaker 6B, a box door 12 that opens and closes the opening 11a on the front surface of the box body 11, and the box door 12 And a pivot shaft 13 attached to the box body 11.
The storage box 10 has a lock means 41 for holding the opening 11a of the box body 11 closed with the box door 12, and a support for supporting the opened state of the box door 12 when the opening 11a of the box body 11 is opened. A tool 42 is also provided.

Inside the box body 11 of the storage box 10, the above-described breaker 6 and a current collector 14 described later are stored.
In addition, any machine / equipment may be housed inside the housing box 10 (box body 11). For example, a switch that can open and close the power from each converter 2 or a lightning strike. An electrical device such as a lightning arrester, a fuse, a relay (relay), a cable (wiring cord), or a connector that releases a surge voltage, an electronic device such as a sensor (ammeter, voltmeter), or a CPU may be accommodated.

<Box body 11>
As shown in FIGS. 2 to 5, the box body 11 is formed in a substantially rectangular parallelepiped shape. The box body 11 has an opening 11 a on the front surface, and the rear surface side of the box body 11 is closed. It is formed in a bottom shape (a bottomed substantially rectangular parallelepiped shape having an opening 11a on the front surface).
The box body 11 has three plates, a vertical plate 31, a left horizontal plate 32A, and a right horizontal plate 32B. Any joining means (joining method) may be used as long as the box body 11 can be formed by bending the vertical plate body 31 and the left and right horizontal plate bodies 32A and 32B at predetermined positions and angles and joining them together. However, the vertical plate 31 and the left and right horizontal plates 32A and 32B are joined to each other, for example, by welding.
The shape of the box body 11 is formed in a horizontally long length in the left-right direction (substantially horizontal direction) longer than the length in the up-down direction (substantially vertical direction).

The box body 11 may be made of any material, but the material may be, for example, iron, stainless steel such as SUS304 or SUS430, or carbon steel.
In the case of stainless steel such as SUS304, surface treatment such as 2B or BA may be performed.

<Vertical plate body 31>
As shown in FIGS. 2 to 5, the vertical plate body 31 forms a lower surface member 33, a rear surface member 34, and an upper surface member 35 of the box body 11 by bending a substantially rectangular plate body into a predetermined shape. Is.
Further, the vertical plate 31 also forms a fixing piece 36 extending from the left and right end portions of the portion constituting the rear member 34.

The fixing piece 36 has a fixing hole 36 a through which fixing means such as a bolt is passed, and a gripping hole 36 b that can be gripped when the storage box 1 is carried.
In addition, in the middle part of the vertical direction (front-rear direction) of the left and right end portions of the lower surface member 33, an electric circuit hole 37 penetrating the lower surface member 33 (the primary side electric circuit hole 37 for the primary side low-voltage AC electric circuit 4L ′ described above). Are provided for the secondary side low-voltage AC circuit 4L ", one secondary side circuit hole 37".

<Left horizontal plate body 32A, Right horizontal plate body 32B>
As shown in FIGS. 2 to 5, the left horizontal plate body 32 </ b> A constitutes the left surface member 32 </ b> A of the box body 11 by bending a substantially rectangular plate body into a predetermined shape.
The right horizontal plate body 32B constitutes the right surface member 32B of the box body 11 by bending a substantially rectangular plate body into a predetermined shape.

<Seal surface 38>
As shown in FIGS. 2 to 5, a seal surface 38 is formed at a position surrounding the opening 11 a on the front surface of the box body 11.
The sealing surface 38 abuts on the rear surface side of the box door 12, thereby sealing (storing) the storage box 1 and preventing (suppressing) rain or dust from entering from the outside.

<Box door 12>
As shown in FIGS. 2 to 5, the box door 12 closes the opening 11 a of the box body 11, and the shape of the box door 12 also has a length in the left-right direction (substantially horizontal direction) in the vertical direction (substantially It is formed in a landscape shape longer than the length in the vertical direction).
The length of the box door 12 in the substantially vertical direction is longer than the length of the box body 11 in the substantially vertical direction. When the opening 11a of the box body 11 is closed, the box door 12 has a lower end edge on the front surface of the box body 11. Located below the lower edge.

The box door 12 has side plates 12a with respect to the door plate 12A. If the side plates 12a can be bent at a predetermined position and angle and joined together to form the box door 12, Any joining means (joining method) may be used, but welding or the like may be used, for example.
The box door 12 may be made of any material, but the material may be, for example, iron, stainless steel such as SUS304 or SUS430, or carbon steel, like the box body 11. .
In the case of stainless steel, surface treatment such as 2B may be performed.

The front surface of the box door 12 (door plate 12A) is substantially flush.
Therefore, unlike a case where a member (lever or the like) to be gripped on the front surface of the door or a member to be locked is provided, and a member such as a spacer is necessary, even when transporting a plurality of storage boxes 10, It can be stacked and transported easily.
Further, when the container 1 is transported, the gripping hole 36b of the fixed piece 36 described above is gripped, so that the transport is further facilitated.

On the back surface of the door plate 12 </ b> A of the box door 12, a seal member 39 that comes into contact with the above-described seal surface 38 is provided.
The seal member 39 is provided at a substantially rectangular position corresponding to the seal surface 38 when the opening 11 a of the box body 11 is closed by the box door 12.
The seal member 39 may be made of any material as long as it contacts the seal surface 38 and prevents rain or the like from entering the storage box 1. For example, natural rubber, silicon rubber, Teflon (registered) (Trademark) resin, organic materials such as urethane foam (urethane foam), and inorganic materials such as leather and ceramics may be used.

<Rotating shaft 13>
As shown in FIGS. 2 to 4, the rotation shaft 13 is for rotatably mounting the box door 12 to the box body 11, and the rotation shaft 13 itself is fixed above the opening 11 a of the box body 11. Has been.
The axis of the rotation shaft 13 is disposed so as to extend in a substantially horizontal direction, and thereby the box door 12 is opened upward.

The rotating shaft 13 may have any configuration as long as it is fixed above the opening 11a of the box main body 11. For example, a shaft support member 18 that can be retrofitted to the box main body 11, and this A shaft body 19 that penetrates both the shaft support member 18 and the box door 12 may be used.
The rotation shaft 13 is mounted such that the maximum opening angle of the box door 12 with respect to the opening 11a (seal surface 38) of the box body 11 is 90 ° or more (for example, 100 °). It does not matter.

<Shaft support material 18, shaft body 19>
As shown in FIG. 4, the shaft support member 18 can be retrofitted to the box body 11, and the shape thereof may be a substantially triangular plate member or the like.
The retrofit position of the shaft support member 18 is not particularly limited. For example, a substantially triangular shape is formed on the front upper portion (not shown in FIGS. 2 and 3) of the outer surface of the left surface member 32A and the right surface member 32B of the box body 11. The shaft support member 18 that is a plate material may be retrofitted (screwed or the like) with fixing means such as screws.

The shaft body 19 is a shaft-like body that penetrates both the shaft support member 18 and the box door 12 described above, and allows the box door 12 to rotate with respect to the shaft support member 18 (box body 11). .
By using the shaft support member 18 and the shaft body 19 that can be retrofitted in this manner, the box main body 11 and the box door 12 can be easily welded as compared to the rotating shaft 13 constituted by a hinge or the like.
At the same time, the shaft support member 18 that can be retrofitted can change the retrofit position according to the size, shape, and structure of the box body 11 and the box door 12, and can share parts and reduce costs.

<The current collection part 14, the electrical circuit body 15, the power transmission path 16, and the connection terminal 17>
As shown in FIGS. 2 to 4, the current collector 14 collects current from a plurality of converters 2 and the like existing outside the storage box 10.
The current collecting unit 14 includes a plurality of electric circuit bodies 15 having a longitudinal direction and flowing collected current at positions farther from the opening 11a of the box body 11 than the breaker 6 described above.

The electric circuit body 15 is not particularly limited as long as it has a longitudinal direction and can flow the collected current, but the material may be a rod-shaped plate made of a conductor such as copper, aluminum, silver, gold, or nichrome.
The electric circuit bodies 15 are not particularly limited as long as there are a plurality of electric circuit bodies 15. However, since the low voltage AC current L flows from the plurality of conversion units 2, for example, the number of the electric circuit bodies 15 is three-phase 3 according to the low voltage AC electric circuit 4 L. If it is a linear system (R phase, S phase, T phase), it will be 3 (3 poles), if it is a 3 phase 4 wire system (R phase, S phase, T phase, N phase), 4 (4 poles) Or two (two poles) if it is a single-phase two-wire system.

The plurality of electric circuit bodies 15 that are rod-shaped plates are disposed substantially parallel to each other in a substantially horizontal direction when viewed from the front, and are erected on one pedestal (front surface) when viewed from the side.
A connection terminal 17 to the power transmission path 16 for supplying a current to the outside of the storage box 10 is provided at the end (left end) 15a on the same side (left side in FIG. 2) in each of the electric circuit bodies 15 as described above. Yes.
Here, the power transmission path 16 is the secondary side low-voltage AC circuit 4L ″ described above.

The connection terminal 17 is attached to the left end portion 15a of each electric circuit body 15 via a fixing member such as a bolt or a nut. The shape of the connection terminal 17 may be substantially rectangular in a side view or the like.
The connection terminal 17 may be attached to the bent left end portion 15a of the electric circuit body 15 (the left end portion 15a bent with respect to the main body portion having the longitudinal direction in the electric circuit body 15).

Each of the connection terminals 17 includes a portion that does not overlap each other in both the front view and the side view (see FIGS. 2 and 3).
That is, the connection terminal 17 is attached at a position where the top, bottom, left, and right front and back do not completely overlap.

Such a current collector 14 is located farther from the opening of the box body than the breaker 6 described above, and is disposed near the rotating shaft 13 inside the box body 11 together with the breaker 6.
In addition, since the current collection part 14 collects the alternating current (low voltage | pressure alternating current L) from the some conversion part 2, it can also be said that it is an "alternating current collection part."

<Locking means 41>
As shown in FIGS. 3 and 4, the lock means (lock member) 41 holds the box door 12 with the opening 11 a closed with respect to the box body 11, and One is provided on each side.
The lock means 41 may have any configuration as long as it holds the box door 12 with the opening 11a of the box body 11 closed, but may be a catch clip, for example.

Note that locking means may be provided on at least one of the right and left sides of the locking means 41.
The lock means 41 may be formed of any material as long as the above-described configuration can be realized. Examples of the material include iron, stainless steel such as SUS304 and SUS430, and carbon steel. It may be. In the case of stainless steel, surface treatment such as 2B may be performed.

<Supporting tool 42>
As shown in FIGS. 3 and 4, the support 42 supports the box door 12 in a state where the opening 11 a of the box body 11 is opened, and the rear surface of the opening 11 a of the box body 11 and the box door 12. Is provided at the upper part on the left and right sides.
The support 42 may have any configuration as long as it supports the box door 12 with the opening 11a of the box body 11 open, but may be a stay or the like, for example.
The support tool 42 (stay) is provided with a stopper mechanism that holds the state extended by a predetermined length. When the support tool 42 is held at a predetermined length by the stopper mechanism, the box door 12 (door plate 12A). And the upper surface of the upper surface member 35 of the box body 11 are substantially horizontal at substantially the same height position (the opening angle of the box door 12 with respect to the opening 11a of the box body 11 is approximately 90 degrees). The support tool 42 is disposed so as to be in a single shape.

This stopper mechanism is released by lifting the box door 12 above substantially horizontal (so that the opening angle of the box door 12 with respect to the opening 11a of the box body 11 is greater than about 90 degrees). Is done.
The support 42 may be made of any material as long as the above-described configuration can be realized. Examples of the material include iron, stainless steel such as SUS304 and SUS430, and carbon steel. It may be. In the case of stainless steel, surface treatment such as 2B may be performed.

<Modification 1 of the storage box 10 (junction box 10 ')>
6 to 9 show a connection box 10 ′ that is a first modification of the storage box 10.
The main difference of the connection box 10 ′ of the first modification from the storage box (AC current collection box) 10 described above is that the connection box 10 ′ is disposed between the power generation unit (solar cell) B and the conversion unit 2. It is a point that has been established.
That is, the connection box 10 ′ of the first modification is not provided in the low-voltage AC circuit 4L like the above-described storage box (AC current collection box) 10, but between the power generation unit B and the conversion unit 2. A DC circuit (low voltage DC circuit) 4′L is provided.

Therefore, a plurality of DC electric circuits 4′L from the solar cell string S in which a plurality of solar cells B are connected in series are connected to the connection box 10 ′.
Since the current of a plurality of solar cell strings S flows into one junction box 10 ′, the power collected in this junction box 10 ′ is about 2.5 to 150 kW (for example, output to the junction box 10 ′. If 6 solar cell strings S with 3.5 kW are connected, 21 kW if 12 are connected, 42 kW if 12 cells are connected, and 5 solar cell strings S with 21 kW output power are connected. 105 kW).
Here, in the case of the junction box 10 ′ with an output power of 105 kW, for example, if the flowing current is 100 A, a high voltage (for example, 16 (16 circuits)) in total in the junction box 10 ′ is 1000 V or more. 1000V).

Another difference between the junction box 10 ′ and the AC current collecting box 10 is that the above-described breaker (AC breaker) 6 is not housed therein, and instead, a plurality of solar cell strings S are collected. A monitoring unit (monitoring device) 22 that monitors the current, a switch 23 that can open and close the current from each solar cell B, a lightning arrester 24 that releases a surge voltage due to lightning, and a plurality of solar cell strings existing outside the connection box 10 '. A current collecting unit 14 ″ for collecting current from S (solar cell B) and a backflow preventing diode may be accommodated.
The number of switches 23 is the same as the number of solar cell strings S connected to the connection box 10 ′.

The junction box 10 ′ may contain any other machine / equipment. For example, electrical equipment such as fuses, relays (relays), cables (wiring cords), connectors, sensors (currents) Electronic devices such as a meter and a voltmeter) and a CPU may be accommodated.
The configuration, operational effects, and usage of the junction box 10 ′ of the other modification 1 are the same as those of the housing box (AC current collection box) 10 described above.

<Modification 2 of the storage box 10 (junction box 10 ")>
FIG. 10 shows a connection box 10 ″ which is a second modification of the storage box 10.
The difference between the connection box 10 "of the second modification and the first modification is that the number of solar cell strings S to be connected is 16 (16 circuits) to 12 (12 circuits). It is.
Accordingly, the number of switches 23 is twelve, and the total voltage applied in the junction box 10 ″ may be a different value (for example, 1500 V).
Other configurations, operation effects, and usage modes of the connection box 10 ″ of the second modification are the same as those of the connection box 10 ′ and the storage box (AC current collection box) 10 of the first modification.

<Others>
The present invention is not limited to the embodiment described above. Each configuration of the power generation system 1 and the storage box 10 or the entire structure, shape, dimensions, and the like can be appropriately changed in accordance with the spirit of the present invention.
The power generation system 1 may incorporate a storage battery in the casing 7 (the uppermost casing (panel casing) 7A, etc.), and when a surplus in the amount of power generation such as solar power generation occurs, the storage battery is charged. However, when the amount of power generation is reduced (when it is cloudy, rainy, or at night), the power consumed by the storage battery may be used to cover the usage of each house (customer).
The power generation system 1 is provided in a different board casing from the casing 7 (the uppermost casing (panel casing) 7A, etc.), or the power transmission panel 21 and the current collector panel 14 'are one panel casing. It may be provided inside the body 7A.
When the storage box 10 is the above-described connection box 10 ′, 10 ″, a DC breaker (breaker) may be stored.

The box body 11 in the storage box 10 does not necessarily have the vertical plate 31 and the left and right horizontal plates 32A and 32B as long as the box body 11 is formed in a substantially rectangular shape with a bottom having an opening 11a on the front surface. For example, the lower surface member 33, the rear surface member 34, the upper surface member 35, the left surface member 32A, the right surface member 32B, and the fixing pieces 36 may be configured by separate plates, or the left surface member 32A, the rear surface member 34, and the right surface member 32B. May be configured by one plate body, and each fixed piece 36, the lower surface member 33, and the upper surface member 35 may be configured by separate plate bodies.
The vertical length of the box door 12 may not necessarily be longer than the vertical length of the box body 11, the lower end edge of the box door 12 is located below the lower end edge of the front surface of the box body 11, and the opening 11 a of the box body 11. If the box door 12 is closed, in particular, the height position of the upper end of the box door 12 may not coincide with the height position of the upper end of the box body 11.

The rotation shaft 13 does not have the shaft support member 18 and the shaft body 19 described above, and may be, for example, a hinge or a hinge member.
Inside the box main body 11, the power transmission path 16 (secondary low-voltage AC circuit 4L ″) and primary low-voltage AC circuit 4L ′ are provided on the inner surfaces of the left surface member 32A and the right surface member 32B and the front surface of the rear surface member 34. It may be attached via the attachment plate 43.
The fixing piece 36 may be capable of being retrofitted to the box body 11, and the post-attachment position is not particularly limited. It may be a substantially central position.

The lock means 41 may be a padlock that fastens the box body 11 and the box door 12 as long as it holds the box door 12 with the opening 11 a of the box body 11 closed.
As long as the support tool 42 supports the box door 12 with the opening 11a of the box body 11 opened, the support tool 42 does not need to expand and contract, and may be a detachable rod-like body.
The power generation unit B is not limited to a solar battery, and may have any configuration as long as it can supply power (electric power) such as a generator (motor) rotated by wind power, hydraulic power, wave power, a dry battery, a storage battery, and the like. Also good. Further, the current flowing from the power generation unit B may be either a direct current or an alternating current.

In addition to the solar power generation system, the power generation system can be used in a system that generates power using a generator (motor) rotated by wind power, hydraulic power, wave power, or the like, and can be used regardless of whether it is outdoors or indoors.
In addition to the solar power generation system, the storage box can also be used in a system that generates power using a generator (motor) rotated by wind power, hydraulic power, wave power, or the like, and can be used regardless of whether it is outdoors or indoors.

DESCRIPTION OF SYMBOLS 1 Electric power generation system 2 Conversion part 3 Transformer 4 Electric circuit 5 Blocking location 5A Top-stage cutoff location 5B Second-stage cutoff location 6 Breaker 6A Top-level breaker 6B Second-level breaker 7 Case 7A Top-level case 7B Second-level case 10 Storage box 11 Box body 11a Opening of box body 12 Box door 13 Rotating shaft 14 Current collecting part 15 Electric path body 16 Power transmission path 17 Connection terminal of electric path body 18 Shaft support material of rotating shaft 19 Shaft body of rotating shaft B Power generation Part

Claims (9)

A power generation system having a plurality of conversion units that convert direct current from a power generation unit into alternating current, and a transformer that transforms the voltage of the alternating current from the plurality of conversion units,
A power generation system characterized in that a breaker is disposed in at least one electric circuit among electric circuits through which an alternating current flows between each of the converters and the transformer so that the electric circuit can be interrupted at a plurality of interruption points. Of the plurality of interruption points in each of the electric circuits, the uppermost breaker capable of breaking the uppermost interruption point closest to the transformer is accommodated in the uppermost housing,
A plurality of interruption points in each of the electric circuits are defined as n-th (n = 2 or more natural numbers) -stage interruption points in order from the transformer except for the uppermost interruption point, and the n-th interruption point can be interrupted. 2. The power generation system according to claim 1, wherein the n-stage breakers are housed in the n-th casing at every same stage and every predetermined number. The transformer is attached to the uppermost housing side,
The power generation system according to claim 2, wherein each of the conversion units is disposed outside the uppermost casing. A power generation system having a conversion unit that converts a direct current from a power generation unit into an alternating current, and a transformer that transforms the voltage of the alternating current from the conversion unit,
The power generation system, wherein the conversion unit is disposed outside a casing to which the transformer is attached. The n-th case includes a box main body that houses the n-th stage breaker, a box door that opens and closes the opening of the box main body, a rotation that rotates the box door and is attached to the box main body. Has a dynamic axis,
4. The power generation system according to claim 2, wherein the n-th stage breaker is disposed closer to the rotation shaft inside the box body. 5. A box body, a box door that opens and closes the opening of the box body, and a storage box that rotates the box door and has a pivot shaft attached to the box body,
Inside the box body, a breaker capable of interrupting current from outside the storage box, and a current collector for collecting current from outside the storage box are housed,
The storage box, wherein the breaker and the current collector are disposed closer to the rotating shaft inside the box body. The current collector includes a plurality of electric circuit bodies having a longitudinal direction and flowing collected current at a position farther from the opening of the box body than the breaker,
At the end on the same side in each of the electric circuit bodies, a connection terminal with a power transmission path for supplying current to the outside of the storage box is provided,
The storage box according to claim 6, wherein each of the connection terminals includes a portion that does not overlap with each other in both a front view and a side view. The pivot shaft includes a shaft support material that can be retrofitted to the box body, and a shaft body that penetrates both the shaft support material and the box door,
The storage box according to claim 6 or 7, wherein the shaft body is positioned above the opening of the box body and extends in a substantially horizontal direction. A box body, a box door that opens and closes the opening of the box body, and a storage box that rotates the box door and has a pivot shaft attached to the box body,
The pivot shaft includes a shaft support material that can be retrofitted to the box body, and a shaft body that penetrates both the shaft support material and the box door,
The storage box, wherein the shaft body is positioned above the opening of the box body and extends in a substantially horizontal direction.