JP6864423B2 - Extra high voltage / transformer placement system - Google Patents

Description

The present invention relates to a transformer that transforms a low-voltage alternating current into a higher-voltage alternating current, and an arrangement system of a transmission unit that transmits a high-voltage alternating current from the transformer.

Conventionally, a substation equipment unit including equipment required for substation is known (see Patent Document 1).
This substation equipment unit consists of a gas-insulated switchgear cubicle containing a gas-insulated switchgear, a transformer main body, and a cooler arranged above the transformer main body to dissipate heat from the transformer main body. It is equipped with a gas-insulated transformer whose primary side is directly connected to the gas-insulated switchgear cubicle, and a switchboard which is directly connected to the secondary side of this gas-insulated transformer. It is installed on the same base to form a single package, enabling batch transportation by a trailer.

Japanese Unexamined Patent Publication No. 2000-184527

However, the substation equipment unit described in Patent Document 1 simply arranges the respective devices in order according to the current flow shown in FIG. 8 of Patent Document 1.
Therefore, when transmitting power from a transformer to a power grid, etc., if the voltage is boosted to a very high voltage (extra high voltage, etc.) for the purpose of suppressing power loss, simply arranging each device along the current flow is not enough. The length increases in the direction of arrangement, the size of the entire unit becomes large, and the space required for transportation and installation becomes extremely long.
Further, the weight and capacity of the substation equipment unit of Patent Document 1 are increased by the amount of the outer box of each device, such as hollowing out the outer box of each device as a refrigerant passage in the fourth embodiment of the patent document 1. ..

In view of these points, it is an object of the present invention to provide an arrangement system in which the "lengthening" and "largeness" of the system are suppressed by providing the high-voltage path with a portion that crosses over the low-voltage path. And.

The arrangement system 1 according to the present invention includes a transformer 2 that transforms a low-voltage AC current L into a higher-voltage high-voltage AC current H, and a transmission unit 3 that transmits the high-voltage AC current H from the transformer 2 to the outside of the system. The arrangement system has a low-voltage AC path 4L for passing a low-voltage AC current L to the transformer 2 and a high-voltage AC path 4H for passing a high-voltage AC current H from the transformer 2 to the transmission unit 3, and the high-voltage AC path 4H. However, the portion having a three-dimensional intersection with the low-voltage path 4L is a portion where the high-voltage path 4H is in a twisted position with the low-voltage path 4L, and at least the portion in the twisted position. In a part, in a plan view, the high-voltage path 4H and the low-voltage path 4L overlap , the low-voltage path 4L is connected to the transformer 2 from above, and the high-voltage path 4H is connected to the transformer 2 from the side. At the same time, the power transmission unit 3 is arranged on the side of the transformer 2, the power transmission unit 3 and the high voltage path 4H are located below the low voltage path 4L, and at least a part of the portion in the twisted position is formed. The first feature is that the high-voltage path 4H and the low-voltage path 4L are substantially orthogonal to each other in a plan view.
The "electric circuit" in the present invention is for passing electricity, and includes conductors such as copper, aluminum, silver, gold, and nichrome, cables in which the conductors are covered with an insulator, general electric wires, and the like. ..

The second feature of the arrangement system 1 according to the present invention is that, in addition to the first feature, the low voltage path 4L has a substantially U-shaped portion in a front view, and is substantially U-shaped. The portion is located so as to straddle the high-voltage path 4H .

The third feature of the arrangement system 1 according to the present invention is a transformer 2 that transforms the low-voltage AC current L into a higher-voltage high-voltage AC current H, and transmits the high-voltage AC current H from the transformer 2 to the outside of the system. It is an arrangement system having a power transmission unit 3 to perform, and has a low voltage AC current L flowing through the transformer 2 and a high voltage AC current 4H flowing from the transformer 2 to the power transmission unit 3. The high-voltage path 4H has a portion that sterically intersects with the low-voltage path 4L, and the steric intersection is a portion where the high-voltage path 4H is in a twisted position with the low-voltage path 4L, and the twisted position. The high-voltage path 4H and the low-voltage path 4L overlap each other in a plan view, and the low-voltage path 4L has a portion that is substantially U-shaped in a front view, and the substantially U-shape. The shaped portion is located so as to straddle the high voltage path 4H.

Due to these features, the high-voltage path 4H is provided with a portion that intersects the low-voltage path 4L in three dimensions, so that the high voltage is higher than that in the case where each device is simply arranged along the current flow as in Patent Document 1. The length of the arrangement system 1 can be reduced by the amount of the three-dimensional intersection of the electric circuit 4H and the low-voltage path 4L.
At the same time, the portion where the high-voltage path 4H and the low-voltage path 4L intersect in three dimensions can be housed in one housing (board housing 10), and the housing provided for each device as in Patent Document 1 (Patent Document 1). Compared with the case where the outer box is provided, the size can be reduced by the amount of the housing (outer box) of each device and the space between each device, which leads to weight reduction.
In other words, it is possible to suppress "longer" and "larger" in the system.
Here, if the voltage of the high-voltage AC current H is, for example, about 22000 V, it can be said that the power transmission unit 3 is an extra-high voltage board, and the arrangement system 1 of the present invention may be called an extra-high voltage board / transformer arrangement system. good.

Further, the low voltage path 4L is connected to the transformer 2 from above, the high voltage path 4H is connected to the transformer 2 from the side, the transmission section 3 is arranged on the side of the transformer 2, and the transmission section 3 and the high voltage path 4H are arranged. By locating the high-voltage path 4L below the low-voltage path 4L, the high-voltage path 4H through which the boosted high-voltage AC current H flows can be shortened as much as possible while suppressing the "lengthening" and "largeness" of the system, and the arrangement system. Since it is possible to transmit the high-voltage AC current H from below 1 to the outside of the system 1, the possibility of inadvertent contact with the high-voltage portion during inspection by the user is reduced.
In other words, it is possible to achieve both "suppression of careless contact" and "miniaturization of the placement system".

Further, the conversion unit 5, the power transmission unit 3, and the transformer 2 are arranged side by side in a predetermined direction in this order, and the high voltage path 4H is made shorter than the low voltage path 4L, thereby further "suppressing careless contact". , "Miniaturization of the placement system" is also compatible.

According to the arrangement system according to the present invention, by providing the high-voltage path with a portion that crosses the low-voltage path in three dimensions, it is possible to suppress "lengthening" and "larger size" in the system.

It is a front view which shows the arrangement system which concerns on 1st Embodiment of this invention. It is a right side surface which shows the arrangement system of 1st Embodiment. FIG. 1 is a view taken along the line AA in FIG. 1, which is a plan sectional view at a substantially central position in the vertical direction of the arrangement system (particularly, the power transmission unit) of the first embodiment. FIG. 3 is a view taken along the line BB in FIG. 3, which is a front sectional view at a substantially central position in the front-rear direction of the arrangement system of the first embodiment. FIG. 4 is a view taken along the line CC in FIG. 4, which is a plan sectional view at an upper position in the vertical direction of the arrangement system of the first embodiment. FIG. 4 is a cross-sectional view taken along the line DD in FIG. 4 and is a right side sectional view at a substantially central position in the left-right direction of the arrangement system of the first embodiment. FIG. 4 is a view taken along the line EE in FIG. 4, which is a left side sectional view at a left-right position in the left-right direction of the arrangement system of the first embodiment. It is a front view which shows the arrangement system (door closing) which concerns on 2nd Embodiment of this invention. It is a side surface which shows the arrangement system (door opening) of 2nd Embodiment. It is a front perspective view which shows the internal structure of the arrangement system of 2nd Embodiment. It is a right side surface which shows the arrangement system of 2nd Embodiment. FIG. 10 is a cross-sectional view taken along the line AA in FIG. 10 and is a right side sectional view at a substantially central position in the left-right direction of the arrangement system of the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 7 show the arrangement system 1 according to the first embodiment of the present invention.
The arrangement system 1 has a transformer 2 that transforms the low-voltage AC current L into a higher-voltage high-voltage AC current H, and a transmission unit 3 that transmits the high-voltage AC current H from the transformer 2 to the outside of the arrangement system 1. At the same time, it also has a low-voltage AC path 4L for passing a low-voltage AC current L to the transformer 2 and a high-voltage AC path 4H for passing a high-voltage AC current H from the transformer 2 to the transmission unit 3.

The arrangement system 1 may have a conversion unit 5 that converts a direct current or an alternating current into a low-voltage alternating current L.
Further, when the arrangement system 1 accommodates the power transmission unit 3 and the conversion unit 5 (one or a plurality of) board housings 10 (such as the power transmission board housing 10A and the conversion board housing 10B described later), the panel housing 10 A current collector that collects direct current from outside (solar cells, etc.), an uninterruptible power supply (UPS) 21, an air conditioner that circulates air inside the panel housing 10, and the above-mentioned conversion unit 5, UPS 21, air conditioner, etc. It may also have an auxiliary machine that supplies current to the power supply.

Here, in the case of a photovoltaic power generation plant described later, it is a solar cell that supplies a direct current to the conversion unit 5 of the arrangement system 1 from outside the panel housing 10, but it is rotated by wind power, hydraulic power, wave power, or the like. It becomes the current from the generator (motor) to be generated.
If the output current from this motor is alternating current, the conversion unit 5 may be provided with both a converter device that converts alternating current into direct current and an inverter device that converts this direct current into direct current, and the output current may be high. In the case of direct current, the conversion unit 5 need only include an inverter device, but the following describes a case where a direct current flows into the conversion unit 5 as in a solar cell.

<Transformer 2>
As shown in FIGS. 1, 3 to 5, the transformer 2 transmits a low-voltage alternating current L (for example, 440V, 100 to 200V, etc.) from the conversion unit 5 to a high-voltage alternating current H (for example, 100 to 200V) suitable for power transmission. Convert to 22000V, 6600V, etc.).
As described above, the transformer 2 is attached to the power transmission panel housing 10A containing the power transmission unit 3 from the outside on the right side thereof, and has a substantially rectangular parallelepiped main body and a radiator 11 attached to the side surface of the main body. , Two connection covers 12 and 13 (upper connection cover 12, side connection cover 13) provided above and to the left of the main body are provided.

The radiator 11 releases (dissipates) the heat accumulated in the cooling medium for cooling the transformer 2 to the outside of the transformer 2 (dissipates heat), and the cooling medium is a mineral oil or gas (nonflammable) having insulating performance. Etc. are used.
The radiator 11 may be cooled by naturally convection of the cooling medium, may be provided with a cooling fan or the like, or may be provided with a meter for controlling the pressure if the cooling medium is a gas.

Of the connection covers 12 and 13, the upper connection cover 12 is a panel housing in which the power transmission unit 3 is built in while covering the connection portion (low voltage connection terminal 14a) between the low voltage path 4L from the conversion unit 5 and the transformer 2. 10 (transmission panel housing 10A)) (hence, the upper connection cover 12 includes not only the portion on the transformer 2 but also the portion connecting to the transmission panel housing 10A).
The specific configuration of the upper connection cover 12 may be any one, and the upper cover peripheral portion 12a may remain even after the upper connection cover 12 is removed. Further, a low-voltage bundle 6L may be formed by gathering a plurality of low-voltage paths 4L (for example, three phases with three or six lines) as a bundle.

On the other hand, the side connection cover 13 is connected to the power transmission panel housing 10A while covering the connection portion (high voltage connection terminal 14b) between the high voltage path 4H to the power transmission unit 3 and the transformer 2.
The specific configuration of the side connection cover 13 may be any one. Further, a high-voltage bundle 6H may be formed by gathering a plurality of high-voltage paths 4H (for example, three or six lines in three phases) as a bundle.

With such a configuration, the low voltage path 4L is connected to the transformer 2 from above, and the high voltage path 4H is connected to the transformer 2 from the side.
Further, as shown in FIG. 4, with respect to the low-voltage path 4L (low-voltage bundle 6L) and the high-voltage path 4H (high-voltage bundle 6H) described so far, the low-voltage path 4L is longer than the high-voltage path 4H (in other words, high voltage). The electric circuit 4H may be shorter than the low voltage path 4L).

If there is a distance between the power transmission board housing 10A and the conversion board housing 10B described later, the space between the two board housings 10A and 10B covering the low voltage path 4L (low voltage bundle 6L). A cover 12'may be provided.
On the other hand, when the power transmission board housing 10A and another board housing 10 such as the conversion board housing 10B are close to each other and there is no distance between them, the inter-housing cover 12'may be omitted.

<Power transmission unit 3>
As shown in FIGS. 1 and 6, the power transmission unit 3 is located on the right side, which is the side closest to the transformer 2 in one or more panel housings 10, and is located on the vacuum breaker (VCB) 15 and the vacuum breaker (VCB) 15. Equipped with a lightning arrester (SAR) and the like.
In the power transmission unit 3, the high-voltage AC current H sent from the transformer 2 through the high-voltage path 4H is connected to the distribution line G via the distribution connection terminal 14c after passing through the above-mentioned VCB15 and the like.
The power transmission unit 3 is directly connected to the power distribution network to the outside of the panel housing 10 via the power distribution line G (particularly when boosted to 22000 V by the transformer 2), or from a plurality of arrangement systems 1. Any configuration may be used as long as it can finally conduct power to the power grid and transmit power, such as connecting to the power grid via another power transmission panel that collects and transmits power.

With this configuration, the power transmission unit 3 and the high-voltage path 4H are located below the low-voltage path 4L, and the high-voltage AC is boosted while suppressing the "lengthening" and "size" of the system. Since the high-voltage AC current H through which the current H flows can be shortened as much as possible, and the high-voltage AC current H can be transmitted from below the arrangement system 1 to the outside of the system 1 via the distribution line G or the like, the high-voltage side The (extra-high side) and low-pressure side are completely separated to reduce the possibility of inadvertent contact with the high-pressure part during inspections (maintenance) by the user.
In other words, it is possible to achieve both "suppression of careless contact (improvement of safety during maintenance)" and "miniaturization of the placement system".
The power transmission unit 3 can be said to be the extra high voltage unit 3 when transmitting extra high voltage power (for example, 22000V or the like).

Further, as shown in FIGS. 5 and 6, the high-voltage path 4H in the power transmission unit 3 has a portion that crosses over the low-voltage path 4L (at a twisted position), and the high-voltage path 4H and the low-voltage path 4L It is possible to reduce the length of the arrangement system 1 by the amount of the three-dimensional intersection.
More specifically, as shown in FIG. 6 (also in FIG. 12 described later), the low-voltage path 4L (low-voltage bundle 6L) penetrates (extends) in the left-right direction and the low-voltage path 4L penetrates (extends) in the power transmission panel housing 10A. Below the (low-voltage bundle 6L), the high-voltage bundle 4H (high-voltage bundle 6H) is arranged so as to extend in the front-rear direction, and the high-voltage path 4H has a portion that sterically intersects with the low-voltage path 4L.

If the high-voltage path 4H has a portion that intersects the low-voltage path 4L in three dimensions, the low-voltage path 4L extends in the front-rear direction, the high-voltage path 4H extends in the left-right direction, and the low-voltage path 4L extends in the vertical direction. , The high voltage path 4H may be arranged so as to extend in the left-right direction or the front-back direction.
Further, the fact that the low-voltage path 4L extends in the left-right direction and the high-voltage path 4H extends in the front-rear direction means that the low-voltage path 4L and the high-voltage path 4H are orthogonal (or substantially orthogonal) in a plan view. Not limited to the case, the case where the low voltage path 4L and the high voltage path 4H intersect at a predetermined angle (intersection angle) such as 45 °, 30 °, 60 ° in a plan view is also included, and when this intersection angle is 0 °. Means that the low voltage path 4L and the high voltage path 4H have a portion substantially parallel to each other.
Regarding this intersection angle, the low-voltage path 4L extends in the front-rear direction while the high-voltage path 4H extends in the left-right direction, and the low-voltage path 4L extends in the vertical direction while the high-voltage path 4H extends in the left-right direction or the front-rear direction. The same applies when it is installed.
The high-voltage path 4H and the low-voltage path 4L may be upside down (otherwise, left-right upside down, front-back upside-down, etc.), and the low-voltage path 4L (low-voltage bundle 6L) is the high-voltage path 4H (high voltage) in the power transmission panel housing 10A. The bundle 6H), the VCB15 described later, the distribution line G, and the like are separated by a partition 10A'.

At the same time, the portion where the high-voltage path 4H and the low-voltage path 4L intersect in three dimensions can be housed in one housing (power transmission panel housing 10A), and a housing (outer box) provided for each device is provided. Compared to the case where the size is reduced by the amount of the housing (outer box) of each device and the space between each device, the weight can be reduced.
In other words, it is possible to suppress "longer" and "larger" in the system.

<Conversion unit 5>
As shown in FIGS. 1, 3 to 5, the conversion unit 5 includes an inverter device that converts a direct current from a solar cell into a low-voltage alternating current L (for example, 440 V, 100 to 200 V, etc.) and the inverter device. It is equipped with a control unit that controls the voltage and frequency of alternating current converted by the inverter, an air breaker (ACB), and the like.
These inverter devices, control units, breakers, etc. are arranged in a conversion housing, and the conversion housing is provided with a rotating fan-shaped air blowing means for letting air inside the conversion housing escape.
It can be said that the board housing 10 that houses such a conversion unit 5 is a conversion board housing 10B, and the conversion unit 5 is also called a power conditioner (abbreviation of a power conditioner).

One or a plurality of conversion units 5 may be arranged in the panel housing 10, and among the one conversion unit or the plurality of conversion units 5, the one closest to the power transmission unit 3 and the above-mentioned power transmission unit 3 The transformers 2 are arranged side by side in a predetermined direction in this order.
By arranging in this way, it is possible to achieve both "miniaturization of the arrangement system" while further "suppressing careless contact".

A current having a voltage lower than the high-voltage AC current H transformed (boost) by the transformer 2 flows through the UPS 21, the air conditioner, the auxiliary machine, and the like like the conversion unit 5.
Therefore, the space (part) in which the UPS 21, the air conditioner, the auxiliary equipment, etc. are arranged can be said to be the low-voltage part (low-voltage board) 16, and may be housed in the conversion board housing 10B as in the conversion unit 5. ..

<Board housing 10>
As shown in FIGS. 1 to 7, the board housing 10 is formed in a substantially rectangular parallelepiped shape, and a door 10a that can be opened and closed is provided on the front surface or the like.
The "front and back" of the substantially rectangular parallelepiped board housing 10 means that the side with the door 10a is "front" and the side opposite to the side with the door 10a is "rear".
Further, "left and right" in the board housing 10 means "left" when the user who entered the board housing 10 faces from "front" to "rear" in the board housing 10. The right hand side when facing from "front" to "rear" is defined as "right".

Therefore, the transformer 2 is attached to the right side of the panel housing 10 (particularly, the power transmission panel housing 10A).
As a matter of course, the transformer 2 or the like may be attached to the facing materials on the left and right opposite sides of the panel housing 10 such as the power transmission panel housing 10A and the conversion panel housing 10B.

<Current collector, circuit breaker>
As shown in FIGS. 1 and 6, the current collecting unit is provided in the panel housing 10 (conversion panel housing 10B) in which the conversion unit 5 is housed. The configuration of the current collector is not particularly limited as long as it collects direct current from the outside of the panel housing 10, but for example, a plurality of current collectors located on the left side of the panel housing 10 and arranged in the vertical direction. The breakers are arranged in pairs on the left and right, and the breakers may have any configuration.
It should be noted that, without passing through this current collector, not only the conversion of the conversion unit 5 but also the transformation by the transformer 2 and the power transmission of the power transmission unit 3 cannot be performed. Therefore, the current collection unit is the power transmission unit 3. It is an auxiliary device 17 that supplements power transmission, conversion of the conversion unit 5, and transformation of the transformer 2.
Further, it can be said that the auxiliary device (current collector) 17 provided in the same panel housing 10 as the conversion unit 5 is arranged on the side away from the transformer 2 with the power transmission unit 3 at the center.

<UPS21, air conditioner, auxiliary equipment>
The UPS21 and the air conditioner are supplied with electric current (electric power) from auxiliary equipment.
The UPS 21 is a device that supplies electricity to each part for a while even in the event of a power failure.
As long as the air in the panel housing 10 can be circulated, the air conditioner may be installed at any position in the panel housing 10 such as the upper left and right and the middle position in the front-rear direction.

The auxiliary machine includes an auxiliary transformer (transformer) and a breaker, and supplies power to the control power supply and fan power supply in the conversion unit 5, the UPS 21, the air conditioner, the lighting in the panel housing 10, the outlet, and the like.
Since the control power is supplied from this auxiliary machine, the conversion unit 5 cannot convert the current without the auxiliary machine.
Further, if the conversion unit 5 cannot convert, it can be said that neither the transformation by the transformer 2 nor the power transmission of the power transmission unit 3 can be performed. Therefore, the auxiliary machine may be included in the auxiliary device 17 that supplements the power transmission of the power transmission unit 3, the conversion of the conversion unit 5, and the transformation of the transformer 2.

Further, it can be said that the auxiliary equipment 17 including the auxiliary equipment and the current collector described above is arranged together with the conversion unit 5 on the side away from the transformer 2 with the power transmission unit 3 as the center.
As a result, the power transmission unit 3 is arranged closer to the transformer 2 in the panel housing 10 than the auxiliary device 17, and as a result, the power transmission unit 3 in the panel housing 10 is arranged as a transformer. The length of the high-voltage path 4H to 2 is shortened as much as possible, and the possibility of inadvertent contact with the high-voltage portion is reduced even when the user inspects the auxiliary device 17.

<Solar power plant>
Hereinafter, a photovoltaic power plant using the arrangement system 1 according to the first embodiment of the present invention will be described.
This photovoltaic power generation plant includes a large number of solar cells, a plurality of junction boxes (with a breaker, etc.) that conduct with each predetermined number of these many solar cells, and an arrangement system 1 that conducts with all of these plurality of junction boxes. And, it has a distribution line G or the like that conducts the distribution system 1 and the distribution network of the electric power company or the like.

The voltage when finally transmitting power from each arrangement system 1 to the distribution network may be a voltage that can be sold or purchased (for example, 6600V or the like), but the voltage transmitted through the distribution line G is sold. -The voltage may be higher than the voltage that can be purchased (for example, as an extra high voltage (extra high voltage), for example, 22000V).
In this case, by making the distribution line G flowing as extra high voltage as long as possible (long-distance wiring), the amount of electric circuit used and transmission loss can be reduced, and it is necessary to separately provide a substation that boosts the voltage to extra high voltage. Is eliminated, and cost reduction can be achieved.
Further, the solar cells, the junction box, and the arrangement system 1 are arranged according to the size and shape of the land to be installed. For example, the power generation of one arrangement system 1 is set to, for example, 1500 kW or 2000 kW), and this arrangement is made. A photovoltaic power plant may be provided with a plurality of systems 1 (for example, 10 or more units of 15,000 kW (= 15 MW) or more or 20000 kW (= 20 MW) or more, and 20 units of 30000 kW (30 MW) or 40,000 kW (40 MW)).

<Second Embodiment>
8 to 12 show the arrangement system 1 according to the second embodiment of the present invention.
The most different feature of the second embodiment from the first embodiment is that the power transmission unit 3 and the conversion unit 5 are housed in one panel housing 10.
That is, in the second embodiment, the power transmission unit 3 and the conversion unit 5 are provided in the panel housing 10, and the transformer 2 is attached to the panel housing 10 from the outside to form a single package. The length of the transformer 2 in the predetermined direction is shortened by the peripheral space as compared with the case where the transformer 2 is also provided in the panel housing 10, and at the same time, the power transmission unit 3 and the conversion unit 5 are provided in the panel housing 10. Only cooling is required, and the power required for cooling can be suppressed. In addition, since on-site assembly work is not required, the construction period can be significantly shortened.

In addition to this, the transformer 2, the power transmission unit 3, and the conversion unit 5 are arranged in the order of the conversion unit 5, the power transmission unit 3, and the transformer 2 in a predetermined direction, whereby one panel housing is provided. Within 10, the power transmission unit 3 is arranged closer to the transformer 2 than the conversion unit 5, and as a result, the length of the high voltage path 4H from the transformer 2 to the power transmission unit 3 in the panel housing 10. However, it is shorter than the length of the low-voltage path 4L from the conversion unit 5 to the transformer 2 in the panel housing 10, and the possibility of inadvertent contact with the high-voltage part during inspection etc. is reduced by the short length. ..
In other words, it is possible to achieve both "suppression of careless contact" and "miniaturization of the board".
This compatibility is the same even when the auxiliary device 17 and / or the conversion unit 5 (low pressure unit 16) is arranged in the panel housing 10 on the side away from the transformer 2 with the power transmission unit 3 as the center.

In the second embodiment, the heat exchanger 22 may be provided on the outer surface of the power transmission panel housing 10A. Since the power distribution system 1 of the second embodiment has a closed structure, the failure rate of each device can be reduced.
Further, in the power distribution system 1 of the second embodiment, a plurality of doors 10a may be provided in the panel housing 10 (the power transmission panel housing 10A is provided with one door 10a in the front and rear, and the conversion panel housing 10a is provided. The body 10B also has a door 10a on the front surface).
The configuration, operation effect, and usage mode of the other arrangement system 1 and the solar power plant using the arrangement system 1 are the same as those in the first embodiment.

<Others>
The present invention is not limited to the above-described embodiments. The structure, shape, dimensions, and the like of each configuration or the whole of the arrangement system 1 and the like can be appropriately changed according to the gist of the present invention.
The arrangement system 1 can be used not only for solar power generation but also for wind power generation and the like when an alternating current is introduced.

The arrangement system 1 may have a built-in storage battery, and when there is a surplus in the amount of power generation such as solar power generation, the storage battery is charged, and when the amount of power generation decreases (cloudy / rainy weather or at night), The power generated by the storage battery may cover the usage of each house (customer).
The arrangement system 1 does not have to have the conversion unit 5 (even if the conversion unit 5 is not housed in the board housing 10), and instead, the conversion unit 5 is assembled with a predetermined number of solar cells. It may be built in each of the junction boxes.
In this case, the auxiliary device 17 and / or the low-voltage unit 16 is arranged in the panel housing 10 on the side away from the transformer 2 with the power transmission unit 3 as the center.
In addition, one or a plurality of conversion units 5 may be provided outside the panel housing 10.

Further, the arrangement system 1 may be provided with a hook that can be lifted by a crane or the like on the upper surface of the board housing 10, and the foundation (base) on which the entire arrangement system 1 lifted via the hook is constructed in advance. ) You may install it on the top.
The foundation may be made of any material such as concrete or steel (H steel), and its shape may be a solid foundation having a uniform thickness or a recess so as to form a space below the floor surface of the board housing 10. It may be a geta foundation having the above.

The transformer 2 may have heat sink fins instead of the heat sink 11.
The VCB 15 in the power transmission unit 3 may be, for example, a drawer type in the front-rear direction in order to improve maintainability, and an inspector who opens the door 10a in the power transmission panel housing 10A for maintenance is in front of the VCB 15. (You may pull it out to the outside of the power transmission panel housing 10A).
The low pressure section 16 may be provided with an oil-immersed transformer (OTR) 23 or a current transformer (CT) 24.

The arrangement system can be used not only in a photovoltaic power generation plant but also in a plant that generates power by a generator (motor) rotated by wind power, hydraulic power, wave power, etc., and can be used both outdoors and indoors.

1 Arrangement system 2 Transformer 3 Power transmission unit 4L Low voltage AC current 4H High voltage circuit 5 Conversion unit L Low voltage AC current H High voltage AC current

Claims (3)

A transformer (2) that transforms a low-voltage alternating current (L) into a higher-voltage alternating current (H), and a transmission unit (H) that transmits the high-voltage alternating current (H) from this transformer (2) to the outside of the system. It is an arrangement system having 3),
It has a low-voltage AC path (4L) that allows a low-voltage AC current (L) to flow through the transformer (2) and a high-voltage AC path (4H) that allows a high-voltage AC current (H) to flow from the transformer (2) to the power transmission unit (3). And
This high-voltage path (4H) has a portion that crosses over the low-voltage path (4L).
The overpass is a portion where the high voltage path (4H) is twisted with the low voltage path (4L).
In a plan view, at least a part of the portion at the twisted position overlaps the high voltage path (4H) and the low voltage path (4L) .
The low voltage path (4L) is connected to the transformer (2) from above, and the high voltage path (4H) is connected to the transformer (2) from the side.
A power transmission unit (3) is arranged on the side of the transformer (2).
The power transmission unit (3) and the high voltage path (4H) are located below the low voltage path (4L).
An arrangement system characterized in that at least a part of the portion at the twisted position is substantially orthogonal to the high voltage path (4H) and the low voltage path (4L) in a plan view. The low voltage path (4L) has a portion that is substantially U-shaped when viewed from the front.
The arrangement system according to claim 1 , wherein the substantially U-shaped portion is arranged across the high-voltage path (4H). A transformer (2) that transforms a low-voltage alternating current (L) into a higher-voltage alternating current (H), and a transmission unit (H) that transmits the high-voltage alternating current (H) from this transformer (2) to the outside of the system. It is an arrangement system having 3),
It has a low voltage AC current (L) that flows through the transformer (2) and a high voltage AC current (H) that flows from the transformer (2) to the transmission unit (3). And
This high-voltage path (4H) has a portion that crosses over the low-voltage path (4L).
The overpass is a portion where the high voltage path (4H) is twisted with the low voltage path (4L).
In a plan view, at least a part of the portion at the twisted position overlaps the high voltage path (4H) and the low voltage path (4L).
The low voltage path (4L) has a portion that is substantially U-shaped when viewed from the front.
An arrangement system characterized in that the substantially U-shaped portion is arranged across the high-voltage path (4H).

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