JP7074223B1 - Power supply system including full load distribution board and full load distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distribution board for a full load which can be stably operated by supplying electric power to a load from a system and a distributed power source and combining the electric power supply devices. An automatic switching switch that switches between a first input terminal to which power of a system is input and a second input terminal to which power of a distributed power supply is input and connects to an output terminal to output to a load, and a system and a first. It is a distribution board for full load provided with a first terminal block and a second terminal block arranged in an electric line connecting the 1 input terminal, and the first terminal block is a first commercial terminal block connected to a system. A second terminal to which a first terminal to which a power line is connected, a first distributed power supply connection line connecting a distributed power supply and a system, and a second commercial power line connecting a first terminal block and a second terminal block are connected. The second terminal block has a terminal, and the second terminal block has a third terminal to which the second commercial power line is connected and a fourth terminal to which the third commercial power line connecting the second terminal block and the first input terminal is connected. The first power supply line that has and supplies power from the power supply device can be connected to the third terminal or the fourth terminal. [Selection diagram] Fig. 1

Description

The present invention relates to a power supply system including a full load distribution board and a full load distribution board.

Conventionally, when the power supply from the commercial power system is stopped, the power stored in the storage battery is output from the self-sustaining output terminal of the power conditioner connected to the storage battery, and specified connected to the specific load distribution board. Power supply systems that supply loads are known.

In recent years, as described in Patent Document 1, when the power supply from the commercial power system is stopped, the distribution board for full load that can supply power to a general load without being limited to a specific load is included. A power supply system has been proposed.

Further, an electric power supply device that supplies electric power generated by a fuel cell and utilizes the heat generated during power generation for hot water supply or the like is also used. Such a power supply device is generally connected to a main distribution board, and a dedicated outlet for connecting a load when the power supply from the commercial power system is stopped is provided via a specific load distribution board. It is installed independently of the electric line.

Japanese Unexamined Patent Publication No. 2019-198203

However, if a power supply device including a fuel cell is connected to the main distribution board to which the commercial power system and the storage battery are connected via the full-load distribution board, even if the power supply from the commercial power system is stopped, The electric power discharged from the storage battery will be supplied to the load via the main distribution board. At this time, the power supply device including the fuel cell may try to connect the storage battery as a commercial power system. Since the storage battery may behave differently from the commercial power system depending on the load and other conditions, the operation of the power supply device including the fuel cell may become unstable and stop.

The present invention has been made in view of the above problems, is a distribution board for full load that supplies power to a load from a commercial power system and a distributed power source, and is stable in combination with a power supply device. It is an object of the present invention to provide a distribution board for full load that can be operated in the future.

The present invention for solving the above problems
The first input terminal to which the power supplied from the commercial power system is input, the second input terminal to which the power supplied from the distributed power supply is input, and the output terminal to which the power supplied to the load is output. An automatic switching switch that has and switches between the first input terminal and the second input terminal and connects to the output terminal.
A first terminal block and a second terminal block arranged in an electric line in which one end is connected to the commercial power system and the other end is connected to the first input terminal.
It is a distribution board for full load equipped with
The first terminal block is a first distributed power supply connection that connects the distributed power supply and the commercial power system to the first terminal to which the other end of the first commercial power line whose one end is connected to the commercial power system is connected. It has a second terminal to which one end of the wire and one end of the second commercial power line connecting the first terminal block and the second terminal block are connected.
The second terminal block is connected to a third terminal to which the other end of the second commercial power line is connected and one end of a third commercial power line connecting the second terminal block and the first input terminal. It has four terminals, and one end of a first power supply line for supplying electric power supplied from a power supply device can be connected to either the third terminal or the fourth terminal.

In the present invention, for a full load equipped with an automatic switching switch that switches between a first input terminal to which power is supplied from a commercial power system and a second input terminal to which power is supplied from a distributed power supply and connects to an output terminal. In the distribution board, power is supplied from the power supply device to the third terminal or the fourth terminal of the second terminal block arranged in the electric circuit where one end is connected to the commercial power system and the other end is connected to the first input terminal. Since one end of the first power supply line to be supplied can be connected, the power supplied by the power supply device can be supplied to the load independently of the power supply from the distributed power supply. As described above, according to the present invention, it is a distribution board for full load that supplies power to a load from a commercial power system and a distributed power source, and can be operated stably by further combining power supply devices. A load distribution board can be provided.

Further, in the present invention,
The current detector can be connected to the power supply device in order to control the power supplied to the third commercial power line based on the detection result of the current detector that detects the current supplied from the commercial power system. And
The second commercial power line may be a wiring for a current detector through which a current to be detected by the current detector flows.

In this way, if the second commercial power line connected to the third terminal of the second terminal board and through which the current supplied from the commercial power system flows is used as the wiring for the current detector, the power supply that can be connected to the second terminal board is used. The device can control the power supplied to the third commercial power line according to the status of the power supplied from the commercial power system based on the detection result of the power detector, so it is combined with the distribution board for full load. The power supply device can be operated stably.

Further, in the present invention,
The current detector can be connected to the power supply device in order to control the power supplied to the third commercial power line based on the detection result of the current detector that detects the current supplied from the commercial power system. And
A mounting space for mounting the current detector may be provided on the second commercial power line.

If the current detector is mounted in the mounting space provided in this way, the current flowing through the second commercial power line connected to the third terminal of the second terminal block, that is, the current supplied from the commercial power system can be detected by the power detector. Can be detected by. Therefore, the power supply device connectable to the second terminal block controls the power supplied to the third commercial power line according to the status of the power supplied from the commercial power system based on the detection result of this current detector. Therefore, the power supply device to be combined with the full-load distribution board can be operated stably.

Further, in the present invention,
The distributed power source may include at least one of a storage battery and a solar cell.

As described above, the distributed power source that supplies electric power to the load via the second input terminal of the automatic switching switch of the full-load distribution board according to the present invention includes at least one of a storage battery and a solar cell. That is, this distributed power source may include a storage battery, a solar cell, or both a storage battery and a solar cell. In this way, power is supplied to the load from the commercial power system and the distributed power source, and the full load can be applied to various distributed power sources as a distribution board for full load that can be stably operated by combining the power supply devices. A distribution board can be provided. However, the distributed power source of the present invention is not limited to these, and various power sources such as wind power generation can be applied.

Further, the present invention
The distribution board for full load and
With the distributed power supply
Is a power supply system that includes
A first power conversion device that converts power supplied from the commercial power system via the distributed power supply connection line or power output from the distributed power supply to the first distributed power supply connection line.
A second power conversion device that converts the power supplied from the distributed power source and inputs it to the second input terminal.
It is characterized by being equipped with.

In this way, the power supply system includes a distribution board for full load that supplies power to the load from the commercial power system and the distributed power source, and a distributed power source, and the power supply device is further combined to operate stably. It is possible to construct a power supply system that can be used.

Further, the present invention
The distribution board for full load,
The first breaker connected to the other end of the first distributed power supply connection line and
A second breaker provided in the electric circuit connecting the second input terminal and the distributed power source, and
A third breaker provided in the electric circuit connecting the output terminal and the main distribution board to which the load is connected, and
With a distribution board for full load,
With the distributed power supply
Is a power supply system that includes
The other end of the second distributed power supply connection line to which one end is connected to the first breaker is connected, and the power supplied from the commercial power system or the power output from the distributed power supply to the second distributed power supply connection line. The first power conversion device that converts
A second power conversion device in which the other end of the second power supply line to which one end is connected to the second breaker is connected to convert the power supplied from the distributed power source and supply it to the load.
It is characterized by being equipped with.

By doing so, if an abnormality such as an excessive current flows in the distributed power supply connection line, the electric circuit to which power is supplied from the distributed power supply, or the electric circuit connecting the output terminal and the main distribution board, each electric circuit occurs. Since a breaker is provided to cut off the power, it is a power supply system that includes a distributed power supply and a full-load distribution board that supplies power to the load from the commercial power system and distributed power supply, and is further combined with a power supply device. It is possible to construct a power supply system that can be operated stably.

In addition, the present invention
Further, the power supply device may be included.

In this way, a power supply system capable of stable power supply can be constructed, including a distribution board for full load that supplies power from a commercial power system and a distributed power source to a load, a distributed power source, and a power supply device. can do.

Further, the present invention
The electric power supply device may generate electric power by gas power generation.

Various electric power supply devices can be applied as the electric power supply device connected to the second terminal block of the full-load distribution board, but hydrogen generated from the gas reacts with oxygen in the air to generate electric power. By applying a power supply device that generates power by gas power generation such as a fuel cell, it is possible to construct a power supply system that stably supplies power from various power sources.

According to the present invention, it is a full-load distribution board that supplies power to a load from a commercial power system and a distributed power source, and can be further combined with a power supply device for stable operation. A board can be provided.

It is a figure which shows the outline of the internal structure of the distribution board for full load which concerns on embodiment of this invention. It is a block diagram which shows the schematic structure of the power supply system which concerns on embodiment of this invention.

[Application example]
Hereinafter, application examples of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration inside the distribution board 1 for full load to which the present invention is applied. FIG. 2 shows the overall configuration of the power supply system including the distribution board 1 for full load and the power storage system 100.

As shown in FIG. 2, the full-load distribution board 1 supplies electric power to a general load connected to the main distribution board 110. Here, the general load is not limited to a specific load even when the power supply from the commercial power system is stopped due to some abnormality, as in the case where the power from the commercial power system is supplied without any trouble. Refers to the load that can be the target of power supply.

The full-load distribution board 1 switches between the power supplied from the commercial power system and the power supplied from the power storage system 100 by the automatic switching switch 5, and is mainly distributed via the breaker 7 for the main distribution board. It supplies power to the general load 111 connected to the electric board 110.

The electric power supplied from the commercial power system is input to the first input terminal 51 of the automatic switching switch 5 through the first commercial power line 11, the first terminal block 2, the second commercial power line 12, and the third commercial power line 13. .. On the other hand, the electric power supplied from the power storage system 100 is input to the second input terminal 52 of the automatic switching switch 5 through the first transformer unit connection line 63, the transformer unit breaker 6, and the second transformer unit connection line 64. .. The automatic switching switch 5 switches between the first input terminal 51 and the second input terminal 52 and connects to the output terminal 53.

Then, the first power supply line 121 for inputting the power supplied from the fuel cell unit 120 to the primary side terminal 41 or the secondary side terminal 42 of the second terminal block 4 of the full load distribution board 1. Can be connected. As a result, the electric power supplied from the fuel cell unit 120 can be input to the first input terminal 51 of the automatic switching switch 5 via the second terminal block 4 and the third commercial power line 13. Further, on the primary side of the second terminal block 4, there is a space for mounting a CT 122 that detects the current flowing through the second commercial power line 12 and inputs the detection result to the fuel cell unit 122 via the current detection line 123. (CT mounting space) 9 is provided.

As shown in FIG. 2, the power storage system 100 includes a storage battery unit 102 including a storage battery 101 and a PV unit 104 including a solar cell 103, and the electric power supplied from the storage battery unit 102 and the PV unit 104 is the power conditioner 105. Is converted by, transformed by the transformer unit 106, and output to the distribution board 1 for full load. A CT 107 for detecting the current flowing through the first commercial power line 11 is connected to the power conditioner 105 by a second current detection line 108, and the detection result by the CT 107 is input to the power conditioner 105.

By setting the detection sites of the CT 107 and the CT 122 as described above, the power storage system 100 and the fuel cell unit 120 can accurately acquire information for control thereof without being affected by the other system. ..

When power is supplied from the commercial power system, by connecting the automatic switching switch 5 to the first input terminal 51 side, the fuel cell unit 120 is connected to the commercial power system and becomes a general load 111. It can supply the required power. Then, when the power supply from the commercial power system is stopped, the power supplied from the power storage system 100 can be supplied to the general load 111 by switching the automatic switching switch 5 to the second input terminal 52 side. can.

By applying the present invention in this way, the distribution board 1 for full load that supplies electric power from the commercial power system and the storage battery 101 to the general load 111, and further combined with the fuel cell unit 120 for stable operation. It is possible to provide a distribution board 1 for a full load that can be used.

[Example 1]
Hereinafter, the power supply system 200 including the full-load distribution board 1 and the full-load distribution board 1 according to the first embodiment of the present invention will be described in more detail with reference to the drawings. However, the configurations of the devices and systems described in this embodiment should be appropriately changed depending on various conditions. That is, it is not intended to limit the scope of the present invention to the following embodiments.

(Distribution board for full load)
In the full-load distribution board 1, when the power is supplied from the commercial power system by switching the automatic switching switch 5, the power supplied from the commercial power system is used as the main distribution board 110 (Fig.). 2) is supplied to the general load 111, and when the power supply from the commercial power system is stopped, the power supplied from the power storage system 100 (see FIG. 2) is supplied to the main distribution board 110. It supplies to the connected general load 111. Here, the full load distribution board 1, the automatic switching switch 5, and the general load 111 correspond to the full load distribution board, the automatic switching switch, and the load of the present invention, respectively.

FIG. 1 is a diagram showing an outline of the internal configuration of the full load distribution board 1 according to the first embodiment. The equipment, parts, and wiring shown in FIG. 1 are housed inside a substantially rectangular parallelepiped housing that is flat in the front-rear direction. On the front surface of the housing, a shield plate having an opening for exposing a predetermined member such as an operation handle or a display portion is attached to the front surface. FIG. 1 shows a schematic configuration of the inside when the shield plate of the full load distribution board 1 is removed and viewed from the front side, and the internal structure of the full load distribution board 1 is appropriately omitted. It is a representation. The full load distribution board 1 is installed on a wall surface or the like so that the vertical direction of the paper surface is vertically vertical. In the following, when the distribution board 1 for full load is installed in this way, the surface facing the wall surface or the like is the back surface, the side opposite to the back surface is the front surface, and the vertical and horizontal directions are the directions seen from the front side. Shall indicate.

Here, the electric power supplied from the commercial power system is input to the full load distribution board 1 through the single-phase three-wire type first commercial power line 11. The first commercial power line 11 is composed of three lines: a U-phase power line 11u, a neutral line 11o, and a W-phase power line 11w. The first commercial power line 11 is connected to the primary side terminal 21 of the first terminal block 2 attached to the full load distribution board 1. The primary side terminal 21 of the first terminal block 2 is composed of a U-phase terminal 21u, a neutral terminal 21o, and a W-phase terminal 21w, and is a U-phase power line 11u, a neutral line 11o, and a W of the first commercial power line 11. One end of the phase power line 11w is connected to each other. The other end of the first commercial power line 11 is connected to a main leakage breaker, a contract breaker, or a smart meter outside the full load distribution board 1. Here, the first terminal block 2 corresponds to the first terminal block of the present invention, and the primary terminal 21 corresponds to the first terminal of the present invention. In FIG. 1, for the sake of explanation, the U-phase power line is indicated by a solid line, the neutral line is indicated by a one-dot chain line, and the W-phase power line is indicated by a broken line.

The first terminal block 2 is provided with a secondary terminal 22. The secondary side terminal 22 is composed of three U-phase terminals 22u, a neutral terminal 22o, and a W-phase terminal 22w. The U-phase terminal 22u, the neutral terminal 22o, and the W-phase terminal 22w are the U-phase terminal 21u and the neutral terminal 21o that constitute the primary side terminal 21 by the conductive member provided inside the first terminal block 2. And W phase terminal 21w, respectively. Here, the secondary terminal 22 corresponds to the second terminal of the present invention.

A circuit breaker 3 for a power storage system is provided on the secondary side of the first terminal block 2. The power storage system breaker 3 cuts off the circuit when an abnormal event such as an excessive current flowing through the power storage system 100 connected to the secondary side occurs. The circuit breaker 3 for a power storage system includes a primary side terminal 31 and a secondary side terminal 32. The primary side terminal 31 of the power storage system breaker 3 is connected to the secondary side terminal 22 of the terminal block 2 by the first power storage system connection line 33. The primary side terminal 31 is composed of three U-phase terminals 31u, a neutral terminal 31o, and a W-phase terminal 31w. One end of the U-phase connection line 33u, the neutral line 33o, and the W-phase connection line 33w constituting the first power storage system connection line 33 is the U-phase terminal 22u, which constitutes the secondary side terminal 22 of the first terminal block 1. It is connected to the sex terminal 22o and the W phase terminal 22w, respectively. The other ends of the U-phase connection line 33u, the neutral line 33o, and the W-phase connection line 33w constituting the first power storage system connection line 33 are U-phase terminals constituting the primary side terminal 31 of the power storage system breaker 3. It is connected to 31u, the neutral terminal 31o and the W phase terminal 31w, respectively. Here, the first power storage system connection line 33 corresponds to the first distributed power supply connection line of the present invention. Further, the circuit breaker 3 for the power storage system corresponds to the first breaker of the present invention.

The secondary side terminal 32 of the power storage system breaker 3 is composed of three U-phase terminals 32u, a neutral terminal 32o, and a W-phase terminal 32w. The secondary terminal 32 of the power storage system breaker 3 is connected to the power storage system 100 described later by the second power storage system connection line 34. The second power storage system connection line 34 includes a U-phase connection line 34u, a neutral line 34o, and a W-phase connection line 34w. The U-phase connection line 34u, the neutral line 34o, and the W-phase connection line 34w of the second power storage system connection line 34 are the U-phase terminal 32u, the neutral terminal 32o, and W of the secondary side terminal 32 of the power storage system breaker 3. It is connected to each of the phase terminals 32w. Here, the second power storage system connection line 34 corresponds to the second distributed power supply connection line of the present invention.

A second terminal block 4 is also provided on the secondary side of the first terminal block 2. The second terminal block 4 includes a primary side terminal 41 and a secondary side terminal 42. The primary side terminal 41 is composed of three U-phase terminals 41u, a neutral terminal 41o and a W-phase terminal 41w, and the secondary side terminal 42 is a U-phase terminal 42u, a neutral terminal 42o and a W-phase terminal 42o. It consists of one. The U-phase terminal 41u, the neutral terminal 41o, and the W-phase terminal 41w of the primary side terminal 41 are formed of the U-phase terminal 42u of the secondary side terminal 42 by a conductive member provided inside the second terminal block 4. It is connected to the sex terminal 42o and the W phase terminal 42o, respectively. The first terminal block 2 and the second terminal block 4 are connected by a second commercial power line 12. The second commercial power line 12 is composed of three lines: a U-phase power line 12u, a neutral line 12o, and a W-phase power line 12w. The U-phase terminal 22u of the secondary side terminal 22 of the first terminal block 2 is connected to the U-phase terminal 41u of the primary side terminal 41 of the second terminal block 4 by the U-phase power line 12u. The neutral terminal 22o of the secondary side terminal 22 of the first terminal block 2 is connected to the neutral terminal 41o of the primary side terminal 41 of the second terminal block 4 by the neutral wire 12o. The W phase terminal 22w of the secondary side terminal 22 of the first terminal block 2 is connected to the W phase terminal 41w of the primary side terminal 41 of the second terminal block 4 by the W phase power line 12w. Here, the second terminal block 4 corresponds to the second terminal block of the present invention, and the primary side terminal 41 and the secondary side terminal 42 correspond to the third terminal and the fourth terminal of the present invention, respectively.

An automatic switching switch 5 is provided on the secondary side of the second terminal block 4. The automatic switching switch 5 includes a first input terminal 51, a second input terminal 52, and an output terminal 53, and automatically switches between the first input terminal 51 and the second input terminal 52 by control to output terminal 53. Connect to. The first input terminal 51 is composed of a U-phase terminal 51u, a neutral terminal 51o, and a W-phase terminal 51w, and the second input terminal 52 is a U-phase terminal 52u, a neutral terminal 52o, and a W-phase terminal 52w. The output terminal 53 is composed of three U-phase terminals 53u, a neutral terminal 53o, and a W-phase terminal 53w.

The secondary side terminal 42 of the second terminal block 4 and the first input terminal 51 of the automatic switching switch 5 are connected by a third commercial power line 13. The third commercial power line 13 is composed of three U-phase power lines 13u, a neutral line 13o, and a W-phase power line 13w. The U-phase terminal 42u of the secondary side terminal 42 of the second terminal block 4 is connected to the U-phase terminal 51u of the first input terminal 51 of the automatic switching switch 5 by the U-phase power line 13u of the third commercial power line 13. .. The neutral terminal 42o of the secondary side terminal 42 of the second terminal block 4 is connected to the neutral terminal 51o of the first input terminal 51 of the automatic switching switch 5 by the neutral wire 13o of the third commercial power line 13. .. The W-phase terminal 42w of the secondary side terminal 42 of the second terminal block 4 is connected to the W-phase terminal 51w of the first input terminal 51 of the automatic switching switch 5 by the W-phase power line 13w of the third commercial power line 13. ..

A transformer unit 106 of a power storage system 100, which will be described later, is connected to the second input terminal 52 of the automatic switching switch 5. A transformer unit breaker 6 provided between the transformer unit 106 of the power storage system 100 and the automatic switching switch 5 is attached to the full load distribution board 1. The transformer unit breaker 6 cuts off the circuit when an abnormal event such as an excessive current flowing from the transformer unit 106 occurs. The transformer unit breaker 6 includes a primary side terminal 61 and a secondary side terminal 62. As described above, the independent output terminal of the transformer unit 106 of the power storage system 100 is connected to the primary side terminal 61 of the transformer unit breaker 6 by the first transformer unit connection line 63. The primary side terminal 61 of the breaker 6 for the transformer unit is composed of three U-phase terminals 61u, a neutral terminal 61o and a W-phase terminal 61w, and is a U-phase power line 63u and a neutral line 63o of the first transformer unit connection line 63. And one end of the W phase power line 63w are connected respectively. Here, the transformer unit breaker 6 corresponds to the second breaker of the present invention, and the first transformer unit connection line 63 corresponds to the second power supply line of the present invention.

The secondary terminal 62 of the transformer unit breaker 6 is connected to the second input terminal 52 of the automatic switching switch 5 by the second transformer unit connection line 64. The secondary side terminal 62 of the breaker 6 for the transformer unit is composed of three U-phase terminals 62u, a neutral terminal 62o and a W-phase terminal 62w, and the second transformer unit connection line 64 is a U-phase power line 64u and a neutral line. It consists of three wires, 64o and a W-phase power line 64w. The U-phase terminal 62u of the secondary side terminal 62 of the transformer unit breaker 6 is connected to the U-phase terminal 52u of the second input terminal 52 of the automatic switching switch 5 by the U-phase power line 64u of the second transformer unit connection line 64. Will be done. The neutral terminal 62o of the secondary side terminal 62 of the transformer unit breaker 6 is connected to the neutral terminal 52o of the second input terminal 52 of the automatic switching switch 5 by the neutral wire 64o of the second transformer unit connection line 64. Will be done. The W-phase terminal 62w of the secondary side terminal 62 of the transformer unit breaker 6 is connected to the W-phase terminal 52w of the second input terminal 52 of the automatic switching switch 5 by the W-phase power line 64w of the second transformer unit connection line 64. Will be done.

The full load distribution board 1 is connected to the general load 111 via the main distribution board 110, and the full load distribution board 1 is connected between the automatic switching switch 5 and the main distribution board 110. The provided main distribution board breaker 7 is attached. The circuit breaker 7 for the main distribution board has a primary side terminal 71 and a secondary side terminal 72.
To prepare for. The primary side terminal 71 of the main distribution board breaker 7 is composed of three U-phase terminals 71u, a neutral terminal 71o, and a W-phase terminal 71w. Further, the secondary side terminal 72 of the main distribution board breaker 7 is composed of three U-phase terminals 72u, a neutral terminal 72o, and a W-phase terminal 72w. The output terminal 53 of the full-load distribution board 1 and the primary side terminal 71 of the main distribution board breaker 7 are connected by a fourth commercial power line 14. The fourth commercial power line 14 is composed of three lines, a U-phase power line 14u, a neutral line 14o, and a W-phase power line 14w. The U-phase terminal 53u of the output terminal 53 of the automatic switching switch 5 is connected to the U-phase terminal 71u of the primary side terminal 71 of the main distribution board breaker 7 by the U-phase power line 14u of the fourth commercial power line 14. .. The neutral terminal 53o of the output terminal 53 of the automatic switching switch 5 is connected to the neutral terminal 71o of the primary side terminal 71 of the breaker 7 for the main distribution board by the neutral wire 14o of the fourth commercial power line 14. .. The W-phase terminal 53w of the output terminal 53 of the automatic switching switch 5 is connected to the W-phase terminal 71w of the primary side terminal 71 of the main distribution board breaker 7 by the W-phase power line 14w of the fourth commercial power line 14. .. The U-phase terminal 72u, the neutral terminal 72o, and the W-phase terminal 72w of the secondary side terminal 72 of the breaker 7 for the main distribution board are the U-phase power line 15u, the neutral line 15o, and the W-phase of the fifth commercial power line 15. It is connected to the main distribution board 110 by the power line 15w. Here, the breaker 7 for the main distribution board corresponds to the third breaker of the present invention.

As described above, the distribution board 1 for full load includes the first terminal block 2, the breaker 3 for the power storage system, the second terminal block 4, the automatic switching switch 5, the breaker 6 for the transformer unit, and the main distribution board. The breaker 7 is housed. Although not shown, a control unit that controls the automatic switching switch 5 is attached to the distribution board 1 for full load adjacent to the automatic switching switch 5, and is connected to each unit by a predetermined wiring. ing. Further, a ground terminal block 8 is also attached to the distribution board 1 for full load. One end of the ground wire is connected to the ground terminal block 8, and the other end of the ground wire to which one end is connected to the ground terminal of the main distribution board 110 is connected. These devices and parts are attached to the housing of the full load distribution board 1 via, for example, a back plate.

Here, when viewed from the front of the full load distribution board 1, the first terminal block 2, the power storage system breaker 3, the transformer unit breaker 6, the automatic switching switch 5, and the main distribution board breaker are arranged in this order from the left. 7 is arranged. All of these devices are arranged so that the vertical direction is the incoming line direction. Then, when viewed from the front of the full load distribution board 1, below the first terminal block 2, the breaker 3 for the power storage system, and the breaker 6 for the transformer unit, the secondary terminal 22 of the first terminal block 2 is automatically connected. An electric circuit is formed to connect to the first input terminal 51 of the switching switch 5. This electric line includes a second commercial power line 12, a second terminal block 4, and a third commercial power line 13. In the distribution board 1 for full load, a second terminal block 4 is provided in this electric line. As described above, the second terminal block 4 is connected to the first terminal block 2 and the automatic switching switch 5, but can be connected to the output terminal of the fuel cell unit 120 described later by the first power supply line. .. The other end of the first power supply line 121 to which one end is connected to the output terminal of the fuel cell unit 120 can be connected to the primary side terminal 41 or the secondary side terminal 42 of the second terminal block 4. Further, in order to arrange a CT 122 for detecting the current flowing through the second commercial power line 12 in the region between the primary side terminal 41 of the second terminal block 4 and the secondary side terminal 22 of the first terminal block 2. CT mounting space 9 is provided. The detection result of the CT 122 is input to the fuel cell unit 120 via the first current detection line 123. Here, the fuel cell unit 120, the first power supply line 121, CT122, the CT mounting space 9, and the second commercial power line 12 are a power supply device, a first power supply line, and a current that generate power by gas power generation of the present invention. Corresponds to the detector, mounting space, and wiring for the current detector.

(Power supply system)
FIG. 2 is an overall configuration diagram of a power supply system 200 including a full-load distribution board 1 and a power storage system 100 shown in FIG.
As described above, the distribution board 1 for full load includes the first terminal block 2, the breaker 3 for the power storage system, the second terminal block 4, the automatic switching switch 5, the breaker 6 for the transformer unit, and the breaker for the main distribution board. 7 is included.

The power storage system 100 includes a storage battery unit 102 including a storage battery 101, a PV unit 104 including a solar cell 103, a power conditioner 105, and a transformer unit 106. The storage battery 101 is a rechargeable and dischargeable secondary battery, and for example, a lithium ion battery and various other secondary batteries can be applied. The power conditioner 105 performs power conversion such as conversion between direct current and alternating current and buck-boost. The DC power generated by the solar cell 103 is converted into 200 V AC power by the power conditioner 105 and output. The AC power supplied from the commercial power system is converted into DC power of a predetermined voltage by the power conditioner 105 and charged to the storage battery 101, and the DC power discharged from the storage battery 101 is 200 V AC power by the power conditioner 105. It is converted to and output. The DC power generated by the solar cell 103 may be converted into a predetermined voltage by the power conditioner 105 and charged in the storage battery 101. The power conditioner 105 performs power conversion to the storage battery unit 102 and the PV unit 104, but may be provided with a power conditioner that performs power conversion to each of them. The detection result of the CT 107 that detects the current flowing through the first commercial power line 11 is input to the power conditioner 105 by the second current detection line 108. The transformer unit 106 converts the 200 V AC power output from the power conditioner 105 into 100 V AC power, and via the first transformer unit connection line 63, the transformer unit breaker 6, and the second transformer unit connection line 64. , Is input to the second input terminal 52 of the automatic switching switch 5. Here, the power conditioner 105 corresponds to the first power conversion device of the present invention, and the power conditioner 105 and the transformer unit 106 correspond to the second power conversion device of the present invention. Further, the storage battery 101 and the solar cell 103 correspond to the distributed power source of the present invention.

As described above, the fuel cell unit 120 outputs the electric power generated by the fuel cell and uses the heat generated during the power generation for hot water supply and the like. The AC power output from the fuel cell unit 120 is input to the first input terminal 51 of the automatic switching switch 5 via the first power supply line 121, the second terminal block 4, and the third commercial power line 13. Since the fuel cell unit 120 can detect the current supplied from the commercial power system and flowing through the second commercial power line 12 by the CT 122, the fuel cell unit 120 is controlled according to the power supplied from the commercial power system. Can be done. Further, the fuel cell unit 120 is provided with a self-sustaining output terminal that outputs the power generated by the fuel cell unit 120 when the power supply from the commercial power system is stopped, and the power failure connected to the self-sustaining output terminal is provided. Through the time-dedicated outlet, power can be supplied to the load connected to the time-dedicated outlet.

The CT 107 connected to the power conditioner 105 of the power storage system 100 is attached to the first commercial power line 11 connected to the primary side of the first terminal block 2. Further, the CT 122 connected to the fuel cell unit 120 is attached to a second commercial power line 12 connected to the secondary side of the first terminal block 2 and the primary side of the second terminal block 4. By setting the detection sites of the CT 107 and the CT 122 in this way, the power storage system 100 and the fuel cell unit 120 can accurately acquire information for control thereof without being affected by the other system.

In this power supply system 200, the power supplied from the commercial power system and the power supplied from the fuel cell unit 120 are input to the first input terminal 51 of the automatic switching switch 5 of the full load distribution board 1 to store electricity. The electric power supplied from the system 100 is input to the second input terminal 52 of the automatic switching switch 5 of the full load distribution board 1. As described above, the power storage system 100 and the fuel cell unit 120 can be controlled independently. Therefore, when power is supplied from the commercial power system, the fuel cell unit 120 is connected to the commercial power system by connecting the first input terminal 51 to the output terminal 53 in the automatic switching switch 5. However, the power required for the general load 111 can be supplied from the commercial power system according to the power supplied and the power consumption of the general load 111. Then, when the power supply from the commercial power system is stopped, the automatic switching switch 5 is switched and the second input terminal 52 is connected to the output terminal 53, whereby the power from the power storage system 100 is transferred to the general load 111. Can be supplied. Further, at this time, since the fuel cell unit 120 can also recognize the stoppage of the power supply from the commercial power system by the CT 122, the power is supplied to the load connected to the dedicated outlet in the event of a power failure independently of the power storage system 100. You can also do it.

In this way, the fuel cell unit 120 can be further combined with the full-load distribution board 1 that supplies electric power from the commercial power system and the storage battery 101 to the general load 111 for stable operation.

The power supply system 200 includes a full-load distribution board 1 and a power storage system 100, but the power supply system 200 may further include a fuel cell unit 120. Further, the power supply device connected to the second terminal block 4 of the full-load distribution board 1 and capable of constituting the power supply system 200 is not limited to the fuel cell unit 120, but is not limited to the fuel cell unit 120, but is also a wind power generation device, another PV unit, or the like. Various power supply devices can be applied. As a power supply device that can be connected to the second terminal block 4 of the full-load distribution board 1, FIG. 2 shows only one fuel cell unit 120, but the power of a plurality of units connected by a crossover wiring. The supply device can also be connected to the second terminal block 4. Further, the power storage system 100 includes a storage battery unit 102 and a PV unit 104, but may include a plurality of storage battery units and a PV unit, and may be composed of one or a plurality of storage battery units including the storage battery unit. Further, the storage battery 101 and the storage battery unit 102 may be a stationary type, or may be a portable storage battery and a storage battery unit mounted on an EV or the like. Further, the power supply system 200 can be configured to include at least one of the full load distribution board 1 and the storage battery 101 and the solar cell 103, and replaces the power storage system 100 with one or a plurality of PV units. It may include a PV system consisting of.

In addition, in order to make it possible to compare the constituent requirements of the present disclosure with the configurations of the examples, the constituent requirements of the present disclosure are described with reference numerals in the drawings.
<Appendix 1>
Supply to the first input terminal (51) to which the power supplied from the commercial power system is input, the second input terminal (52) to which the power supplied from the distributed power supply (101) is input, and the load (111). An automatic switching switch (5) having an output terminal (53) for outputting the power to be output, and switching between the first input terminal (51) and the second input terminal (52) to connect to the output terminal. )When,
A first terminal block (2) and a second terminal block (4) arranged in an electric wire having one end connected to the commercial power system and the other end connected to the first input terminal (51).
It is a distribution board for full load (1) equipped with
The first terminal block (2) includes a first terminal (21) to which one end is connected to the other end of a first commercial power line (11) connected to the commercial power system, the distributed power source (101), and the above. One end of the first distributed power supply connection line (33) connecting the commercial power system and one end of the second commercial power line (12) connecting the first terminal block (2) and the second terminal block (4). Has a second terminal (22) to which and is connected
The second terminal block (4) includes a third terminal (41) to which the other end of the second commercial power line (12) is connected, the second terminal block (4), and the first input terminal (51). A first power supply line (121) having a fourth terminal (42) to which one end of a third commercial power line (13) is connected to and supplies power supplied from a power supply device (120). A full-load distribution board (1), characterized in that one end can be connected to either the third terminal (41) or the fourth terminal (42).

1: Distribution board for full load 2: 1st terminal block 4: 2nd terminal block 5: Automatic switching switch 9: CT mounting space 21: 1st side terminal 22: Secondary side terminal 41: 1st side terminal 42 : Secondary side terminal 33: 1st power storage system connection line 51: 1st input terminal 52: 2nd input terminal 53: Output terminal 101: Storage battery 111: General load 121: 1st power supply line

Claims (8)

The first input terminal to which the power supplied from the commercial power system is input, the second input terminal to which the power supplied from the distributed power supply is input, and the output terminal to which the power supplied to the load is output. An automatic switching switch that has and switches between the first input terminal and the second input terminal and connects to the output terminal.
A first terminal block and a second terminal block arranged in an electric line in which one end is connected to the commercial power system and the other end is connected to the first input terminal.
It is a distribution board for full load equipped with
The first terminal block is a first distributed power supply connection that connects the distributed power supply and the commercial power system to the first terminal to which the other end of the first commercial power line whose one end is connected to the commercial power system is connected. It has a second terminal to which one end of the wire and one end of the second commercial power line connecting the first terminal block and the second terminal block are connected.
The second terminal block is connected to a third terminal to which the other end of the second commercial power line is connected and one end of a third commercial power line connecting the second terminal block and the first input terminal. All having four terminals, one end of a first power supply line for supplying power supplied from a power supply device can be connected to either the third terminal or the fourth terminal. Distribution board for load. The current detector is connected to the power supply device in order to control the power supplied to the third commercial power line based on the detection result of the current detector that detects the current supplied from the commercial power system. ,
The distribution board for full load according to claim 1, wherein the second commercial power line is wiring for a current detector through which a current to be detected by the current detector flows. The current detector is connected to the power supply device in order to control the power supplied to the third commercial power line based on the detection result of the current detector that detects the current supplied from the commercial power system. ,
The distribution board for full load according to claim 1, wherein a mounting space for mounting the current detector is provided on the second commercial power line. The distribution board for full load according to any one of claims 1 or 3, wherein the distributed power source includes at least one of a storage battery and a solar cell. The distribution board for full load according to any one of claims 1 to 4, and the distribution board for full load.
With the distributed power supply
Is a power supply system that includes
A first power conversion device that converts power supplied from the commercial power system via the first distributed power supply connection line or power output from the distributed power supply to the first distributed power supply connection line.
A second power conversion device that converts the power supplied from the distributed power source and inputs it to the second input terminal.
A power supply system characterized by being equipped with. The distribution board for full load according to any one of claims 1 to 4.
The first breaker connected to the other end of the first distributed power supply connection line and
A second breaker provided in the electric circuit connecting the second input terminal and the distributed power source, and
A third breaker provided in the electric circuit connecting the output terminal and the main distribution board to which the load is connected, and
With a distribution board for full load,
With the distributed power supply
Is a power supply system that includes
The other end of the second distributed power supply connection line to which one end is connected to the first breaker is connected, and the power supplied from the commercial power system or the power output from the distributed power supply to the second distributed power supply connection line. The first power conversion device that converts
A second power conversion device in which the other end of the second power supply line to which one end is connected to the second breaker is connected to convert the power supplied from the distributed power source and supply it to the load.
A power supply system characterized by being equipped with. Further, the power supply device is included.
The power supply system according to claim 5 or 6. The power supply system according to claim 7, wherein the power supply device generates electric power by gas power generation.

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