Distribution board for full load and power supply system including the distribution board for full load

Abstract

To provide an all-load power distribution board for supplying power from a system and a distributed power source to loads and allowing stable operation by combination with a power supply device.SOLUTION: An all-load power distribution board comprises: an automatic change-over switch that switches between a first input terminal for power input from a system and a second input terminal for power input from a distributed power source for connection to an output terminal for output to loads; and a first terminal block and a second terminal block that are disposed in a cable way connecting the system and the first input terminal. The first terminal block has a first terminal connected to a first commercial power line connected to the system, and a second terminal connected to a first distributed power source connection line connecting the distributed power source and the system and to a second commercial power line connecting the first and second terminal blocks. The second terminal block has a third terminal connected to the second commercial power line, and a fourth terminal connected to a third commercial power line connecting the second terminal block and the first input terminal. A first power supply line for supplying power from a power supply device can be connected to the third or fourth terminal.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a distribution board for full load and a power supply system including the distribution board for full load.

Background Art

[0002] Conventionally, when the power supply from the commercial power system stops, the power stored in the storage battery is output from the self - power output terminal of the power conditioner connected to the storage battery and supplied to a specific load connected to a specific load distribution board. A power supply system is known.

[0003] In recent years, as described in Patent Document 1, when the power supply from the commercial power system stops, a power supply system including a distribution board for full load that can supply power to general loads without being limited to specific loads has been proposed.

[0004] In addition, a power supply device that supplies 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 the main distribution board and is provided with a dedicated outlet for connecting a load when the power supply from the commercial power system stops, independently of the circuit via the specific load distribution board.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, when a power supply device including a fuel cell is connected to a main distribution board to which a commercial power system and a storage battery are connected via a full-load distribution board, even when the power supply from the commercial power system stops, the 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 attempt to connect the storage battery as if it were a commercial power system. Since the storage battery may exhibit behavior different from that of the commercial power system depending on conditions such as the load, the operation of the power supply device including the fuel cell may become unstable and may stop.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide a full-load distribution board that supplies power from a commercial power system and distributed power sources to a load, and that can operate stably in combination with a power supply device.

Means for Solving the Problems

[0008] The present invention for solving the above problems is a full-load distribution board having a first input terminal to which power supplied from a commercial power system is input, a second input terminal to which power supplied from a distributed power source is input, and an output terminal from which power supplied to a load is output, and an automatic changeover switch that switches the first input terminal and the second input terminal and connects them to the output terminal, a first terminal block and a second terminal block arranged in a circuit having one end connected to the commercial power system and the other end connected to the first input terminal, wherein the first terminal block has a first terminal to which the other end of a first commercial power line having one end connected to the commercial power system is connected, one end of a first distributed power source connection line connecting the distributed power source and the commercial power system, and one end of a second commercial power line connecting the first terminal block and the second terminal block connected thereto a second terminal, and The second terminal block has a third terminal to which the other end of the second commercial power line is connected, and a fourth terminal to which one end of a third commercial power line connecting the second terminal block and the first input terminal is connected, and 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.

[0009] In the present invention, in a distribution board for all loads provided with an automatic changeover 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 source and connects them to an output terminal, one end of a first power supply line for supplying power from a power supply device can be connected to the third terminal or the fourth terminal of a second terminal block arranged in a circuit having one end connected to the commercial power system and the other end connected to the first input terminal. Therefore, independently of the power supply from the distributed power source, the power supplied by the power supply device can be supplied to the load. Thus, according to the present invention, there is provided a distribution board for all loads that supplies power from a commercial power system and a distributed power source to a load, and that can be stably operated in combination with a power supply device.

[0010] Also, 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 a current detector that detects the current supplied from the commercial power system. The second commercial power line may be a wiring for a current detector through which the current to be detected by the current detector flows.

[0011] In this way, if the second commercial power line, which is connected to the third terminal of the second terminal block and through which the current supplied from the commercial power system flows, is used as the wiring for the current detector, the power supply device that can be connected to the second terminal block 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. Therefore, the power supply device combined with the distribution board for all loads can be stably operated.

[0012] Also, in the present invention, the power supply device is connectable to a current detector for detecting a current supplied from the commercial power system, in order to control the power supplied to the third commercial power line based on the detection result of the current detector; a mounting space for mounting the current detector on the second commercial power line may be provided.

[0013] If a current detector is attached to 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. Therefore, the power supply device connectable to the second terminal block can control the power supplied to the third commercial power line according to the situation of the power supplied from the commercial power system based on the detection result of this current detector, so that the power supply device combined with the main distribution board for all loads can be stably operated.

[0014] Also, in the present invention, the distributed power source may include at least one of a storage battery and a solar cell.

[0015] Thus, the distributed power source that supplies power to the load via the second input terminal of the automatic changeover switch of the main distribution board for all loads 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, may include a solar cell, or may include both a storage battery and a solar cell. In this way, a main distribution board for all loads that can supply power to the load from the commercial power system and the distributed power source and can be stably operated in combination with the power supply device can be provided, which is applicable to various distributed power sources. 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.

[0016] Also, the present invention is a power supply system including the main distribution board for all loads, the distributed power source, and A first power conversion device that converts power supplied from the commercial power system via the distributed power connection line or power output from the distributed power source to the first distributed power connection line; A second power conversion device that converts power supplied from the distributed power source and inputs it to the second input terminal; It is characterized by comprising the above.

[0017] In this way, a power supply system including a distribution board for all loads that supplies power from the commercial power system and the distributed power source to the load, and the distributed power source, and further capable of stably operating by combining a power supply device can be constructed.

[0018] Further, the present invention is The distribution board for all loads, A first breaker connected to the other end of the first distributed power connection line; A second breaker provided in a circuit connecting the second input terminal and the distributed power source; A third breaker provided in a circuit connecting the output terminal and the main distribution board to which the load is connected; A distribution board for all loads having the above; The distributed power source, A power supply system including the above, The other end of a second distributed power connection line having one end connected to the first breaker is connected, and a first power conversion device that converts power supplied from the commercial power system or power output from the distributed power source to the second distributed power connection line; The other end of a second power supply line having one end connected to the second breaker is connected, and a second power conversion device that converts power supplied from the distributed power source and supplies it to the load; It is characterized by comprising the above.

[0019] In this way, since a breaker is provided to cut off each circuit when an abnormality occurs such as an excessive current flowing through the distributed power source connection line, the circuit supplied with power from the distributed power source, or the circuit connecting the output terminal and the main distribution board, it is possible to construct a power supply system including a main distribution board for all loads that supplies power from the commercial power system and the distributed power source to the load and the distributed power source, and further capable of stably operating in combination with a power supply device.

[0020] Also, the present invention Furthermore, it may be configured to include the power supply device.

[0021] In this way, it is possible to construct a power supply system including a main distribution board for all loads that supplies power from the commercial power system and the distributed power source to the load, the distributed power source, and the power supply device, and capable of stably supplying power.

[0022] Also, the present invention The power supply device may be configured to generate power by gas power generation.

[0023] As the power supply device connected to the second terminal block of the main distribution board for all loads, various power supply devices can be applied. However, by applying a power supply device that generates power by gas power generation such as a fuel cell that generates power by reacting hydrogen generated from gas with oxygen in the air, it is possible to construct a power supply system that stably supplies power from various power sources.

Advantages of the Invention

[0024] According to the present invention, it is possible to provide a main distribution board for all loads that supplies power from the commercial power system and the distributed power source to the load, and is further capable of stably operating in combination with a power supply device.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Mode for Carrying Out the Invention

[0026] 〔Application Example〕 Hereinafter, application examples of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration inside a main distribution board 1 for all loads to which the present invention is applied. FIG. 2 shows an overall configuration of a power supply system including the main distribution board 1 for all loads and a power storage system 100.

[0027] As shown in FIG. 2, the main distribution board 1 for all loads supplies power to general loads connected to the main distribution board 110. Here, the general load refers to a load that can be a target of power supply without being limited to a specific load both when power is supplied from the commercial power system without trouble and when the power supply from the commercial power system stops due to some abnormality.

[0028] The main distribution board 1 for all loads switches the power supplied from the commercial power system and the power supplied from the power storage system 100 by an automatic transfer switch 5, and supplies it to a general load 111 connected to the main distribution board 110 via a main distribution board breaker 7.

[0029] The power supplied from the commercial power system is input to the first input terminal 51 of the automatic transfer 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 power supplied from the power storage system 100 is input to the second input terminal 52 of the automatic transfer 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 transfer switch 5 switches either the first input terminal 51 or the second input terminal 52 and connects it to the output terminal 53.

[0030] Then, a first power supply line 121 for inputting the power supplied from 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 of the main distribution board 1 for full load. Thereby, the power supplied from the fuel cell unit 120 can be input to the first input terminal 51 of the automatic changeover switch 5 via the second terminal block 4 and the third commercial power line 13. Further, a space (CT mounting space) 9 for mounting a CT122 for detecting the current flowing through the second commercial power line 12 and inputting the detection result to the fuel cell unit 122 via the first current detection line 123 is provided on the primary side of the second terminal block 4.

[0031] As shown in FIG. 2, the power storage system 100 includes a power storage unit 102 including a storage battery 101 and a PV unit 104 including a solar cell 103, and the power supplied from the power storage unit 102 and the PV unit 104 is converted by a power conditioner 105, transformed by a transformer unit 106, and output toward the main distribution board 1 for full load. A CT107 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 CT107 is input to the power conditioner 105.

[0032] By setting the detection parts of the CT107 and the CT122 as described above, the power storage system 100 and the fuel cell unit 120 can accurately obtain the information for their respective controls without being affected by the other system.

[0033] When power is supplied from the commercial power system, by connecting the automatic changeover switch 5 to the first input terminal 51 side, the fuel cell unit 120 can be connected to the commercial power system and supply the power required for the general load 111. Then, when the power supply from the commercial power system stops, by switching the automatic changeover switch 5 to the second input terminal 52 side, the power supplied from the power storage system 100 can be supplied to the general load 111.

[0034] By applying the present invention in this way, it is possible to provide a distribution board 1 for all loads that supplies power from a commercial power system and a storage battery 101 to a general load 111, and that can operate stably by further combining a fuel cell unit 120.

[0035] [Example 1] Hereinafter, the distribution board 1 for all loads and the power supply system 200 including the distribution board 1 for all loads according to Example 1 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 according to various conditions. That is, the scope of the present invention is not intended to be limited to the following embodiments.

[0036] (Distribution board for all loads) In the distribution board 1 for all loads, by switching the automatic transfer switch 5, when power is supplied from the commercial power system, the power supplied from the commercial power system is supplied to the general load 111 connected to the main distribution board 110 (see FIG. 2). When the supply of power from the commercial power system stops, the power supplied from the power storage system 100 (see FIG. 2) is supplied to the general load 111 connected to the main distribution board 110. Here, the distribution board 1 for all loads, the automatic transfer switch 5, and the general load 111 respectively correspond to the distribution board for all loads, the automatic transfer switch, and the load of the present invention.

[0037] FIG. 1 is a diagram showing an outline of the internal configuration of the main load distribution board 1 according to Embodiment 1. The devices, components, and wiring shown in FIG. 1 are housed inside a substantially rectangular parallelepiped-shaped housing that is flat in the front and back directions. A shield plate having an opening through which predetermined members such as operation handles and display units are exposed is attached to the front surface of the housing. FIG. 1 shows a schematic internal configuration viewed from the front side with the shield plate of such a main load distribution board 1 removed, and represents the internal structure of the main load distribution board 1 with appropriate omissions. The main load distribution board 1 is installed on a wall surface or the like such that the vertical direction of the paper is the vertical up and down. Hereinafter, when the main load distribution board 1 is installed in this manner, the surface facing the wall surface or the like is the back surface, the side opposite to this back surface is the front surface, and the up, down, left, and right directions indicate the respective directions viewed from the front side.

[0038] Here, the electric power supplied from the commercial power system is input to the main load distribution board 1 through the single-phase three-wire type first commercial power line 11. The first commercial power line 11 consists of three lines: the U-phase power line 11u, the neutral line 11o, and the W-phase power line 11w. The first commercial power line 11 is connected to the primary side terminals 21 of the first terminal block 2 attached to the main load distribution board 1. The primary side terminals 21 of the first terminal block 2 consist of three terminals: the U-phase terminal 21u, the neutral terminal 21o, and the W-phase terminal 21w, and one ends of the U-phase power line 11u, the neutral line 11o, and the W-phase power line 11w of the first commercial power line 11 are respectively connected thereto. The other end of the first commercial power line 11 is connected to a main trunk leakage breaker, a contract breaker, or a smart meter outside the main load distribution board 1. Here, the first terminal block 2 corresponds to the first terminal block of the present invention, and the primary side terminals 21 correspond to the first terminals of the present invention. In FIG. 1, for the sake of explanation, the U-phase power line is shown as a solid line, the neutral line as a dashed-dotted line, and the W-phase power line as a dashed line. The other end of the first commercial power line 11 is connected to a main trunk leakage breaker, a contract breaker, or a smart meter outside the main load distribution board 1. Here, the first terminal block 2 corresponds to the first terminal block of the present invention, and the primary side terminals 21 correspond to the first terminals of the present invention. In FIG. 1, for the sake of explanation, the U-phase power line is shown as a solid line, the neutral line as a dashed-dotted line, and the W-phase power line as a dashed line.

[0039] The first terminal block 2 is provided with secondary terminals 22. The secondary terminals 22 are composed of three terminals: a U-phase terminal 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 respectively connected to the U-phase terminal 21u, the neutral terminal 21o, and the W-phase terminal 21w that constitute the primary terminal 21 by conductive members provided inside the first terminal block 2. Here, the secondary terminal 22 corresponds to the second terminal of the present invention.

[0040] A breaker 3 for a power storage system is provided on the secondary side of the first terminal block 2. The breaker 3 for a power storage system shuts 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 breaker 3 for a power storage system includes a primary terminal 31 and a secondary terminal 32. The primary terminal 31 of the breaker 3 for a power storage system is connected to the secondary terminal 22 of the first terminal block 2 by a first power storage system connection line 33. The primary terminal 31 is composed of three terminals: a U-phase terminal 31u, a neutral terminal 31o, and a W-phase terminal 31w. One ends of the U-phase connection line 33u, the neutral line 33o, and the W-phase connection line 33w that constitute the first power storage system connection line 33 are respectively connected to the U-phase terminal 22u, the neutral terminal 22o, and the W-phase terminal 22w that constitute the secondary terminal 22 of the first terminal block 2. And the other ends of the U-phase connection line 33u, the neutral line 33o, and the W-phase connection line 33w that constitute the first power storage system connection line 33 are respectively connected to the U-phase terminal 31u, the neutral terminal 31o, and the W-phase terminal 31w that constitute the primary terminal 31 of the breaker 3 for a power storage system. Here, the first power storage system connection line 33 corresponds to the first distributed power source connection line of the present invention. Also, the breaker 3 for a power storage system corresponds to the first breaker of the present invention.

[0041] The secondary side terminals 32 of the breaker 3 for the power storage system consist of three terminals: a U-phase terminal 32u, a neutral terminal 32o, and a W-phase terminal 32w. The secondary side terminals 32 of the breaker 3 for the power storage system are connected to a power storage system 100, which will be described later, by a second power storage system connection line 34. The second power storage system connection line 34 consists of 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 respectively connected to the U-phase terminal 32u, the neutral terminal 32o, and the W-phase terminal 32w of the secondary side terminals 32 of the breaker 3 for the power storage system. Here, the second power storage system connection line 34 corresponds to the second distributed power source connection line of the present invention.

[0042] 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 consists of three terminals: a U-phase terminal 41u, a neutral terminal 41o, and a W-phase terminal 41w. The secondary side terminal 42 consists of three terminals: a U-phase terminal 42u, a neutral terminal 42o, and a W-phase terminal 42w. The U-phase terminal 41u, the neutral terminal 41o, and the W-phase terminal 41w of the primary side terminal 41 are respectively connected to the U-phase terminal 42u, the neutral terminal 42o, and the W-phase terminal 42w of the secondary side terminal 42 by conductive members provided inside the second terminal block 4. 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 consists 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 line 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 respectively correspond to the third terminal and the fourth terminal of the present invention.

[0043] On the secondary side of the second terminal block 4, an automatic switching switch 5 is provided. The automatic switching switch 5 includes a first input terminal 51, a second input terminal 52, and an output terminal 53, and automatically switches either the first input terminal 51 or the second input terminal 52 by control and connects it to the output terminal 53. The first input terminal 51 consists of three terminals: a U-phase terminal 51u, a neutral terminal 51o, and a W-phase terminal 51w. The second input terminal 52 consists of three terminals: a U-phase terminal 52u, a neutral terminal 52o, and a W-phase terminal 52w. The output terminal 53 consists of three terminals: a U-phase terminal 53u, a neutral terminal 53o, and a W-phase terminal 53w.

[0044] 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 consists of three lines: a U-phase power line 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 line 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.

[0045] The transformer unit 106 of the power storage system 100 described later is connected to the second input terminal 52 of the automatic changeover switch 5. A breaker 6 for the transformer unit provided between the transformer unit 106 of the power storage system 100 and the automatic changeover switch 5 is attached to the main distribution board 1 for all loads. The breaker 6 for the transformer unit shuts off the circuit when an abnormal event such as an excessive current flowing from the transformer unit 106 occurs. The breaker 6 for the transformer unit 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 breaker 6 for the transformer unit by the first transformer unit connection line 63. The primary side terminal 61 of the breaker 6 for the transformer unit consists of three terminals: a U-phase terminal 61u, a neutral terminal 61o, and a W-phase terminal 61w, and one ends of the U-phase power line 63u, the neutral line 63o, and the W-phase power line 63w of the first transformer unit connection line 63 are respectively connected thereto. Here, the breaker 6 for the transformer unit 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.

[0046] The secondary side terminal 62 of the breaker 6 for the transformer unit is connected to the second input terminal 52 of the automatic changeover switch 5 by the second transformer unit connection line 64. The secondary side terminal 62 of the breaker 6 for the transformer unit consists of three terminals: a U-phase terminal 62u, a neutral terminal 62o, and a W-phase terminal 62w, and the second transformer unit connection line 64 consists of three lines: a U-phase power line 64u, a neutral line 64o, and a W-phase power line 64w. The U-phase terminal 62u of the secondary side terminal 62 of the breaker 6 for the transformer unit is connected to the U-phase terminal 52u of the second input terminal 52 of the automatic changeover switch 5 by the U-phase power line 64u of the second transformer unit connection line 64. The neutral terminal 62o of the secondary side terminal 62 of the breaker 6 for the transformer unit is connected to the neutral terminal 52o of the second input terminal 52 of the automatic changeover switch 5 by the neutral line 64o of the second transformer unit connection line 64. The W-phase terminal 62w of the secondary side terminal 62 of the breaker 6 for the transformer unit is connected to the W-phase terminal 52w of the second input terminal 52 of the automatic changeover switch 5 by the W-phase power line 64w of the second transformer unit connection line 64.

[0047] The full-load distribution board 1 is connected to the general load 111 via the main distribution board 110. A main distribution board breaker 7 is provided between the automatic transfer switch 5 and the main distribution board 110 on the full-load distribution board 1. The main distribution board breaker 7 includes a primary side terminal 71 and a secondary side terminal 72. The primary side terminal 71 of the main distribution board breaker 7 consists of three terminals: a U-phase terminal 71u, a neutral terminal 71o, and a W-phase terminal 71w. The secondary side terminal 72 of the main distribution board breaker 7 also consists of three terminals: a U-phase terminal 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 the fourth commercial power line 14. The fourth commercial power line 14 consists 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 transfer 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 transfer switch 5 is connected to the neutral terminal 71o of the primary side terminal 71 of the main distribution board breaker 7 by the neutral line 14o of the fourth commercial power line 14. The W-phase terminal 53w of the output terminal 53 of the automatic transfer 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 main distribution board breaker 7 are connected to the main distribution board 110 by the U-phase power line 15u, the neutral line 15o, and the W-phase power line 15w of the fifth commercial power line 15. Here, the main distribution board breaker 7 corresponds to the third breaker of the present invention.

[0048] As described above, the main distribution board 1 for full load accommodates a first terminal block 2, a breaker 3 for the power storage system, a second terminal block 4, an automatic transfer switch 5, a breaker 6 for the transformer unit, and a breaker 7 for the main distribution board. Although not shown in the figure, a control unit that controls the automatic transfer switch 5 is attached adjacent to the automatic transfer switch 5 in the main distribution board 1 for full load, and is connected to each part by predetermined wiring. Further, an earth terminal block 8 is also attached to the main distribution board 1 for full load. One end of an earth wire is connected to the earth terminal block 8, and the other end of an earth wire whose one end is connected to the earth terminal of the main distribution board 110 is connected thereto. These devices and components are attached to the housing of the main distribution board 1 for full load via, for example, a back plate.

[0049] Here, when viewed from the front of the main distribution board 1 for full load, in order from the left, the first terminal block 2, the breaker 3 for the power storage system, the breaker 6 for the transformer unit, the automatic transfer switch 5, and the breaker 7 for the main distribution board are arranged. All of these devices are arranged such that the vertical direction is the incoming line direction. And when viewed from the front of the main distribution board 1 for full load, below the first terminal block 2, the breaker 3 for the power storage system, and the breaker 6 for the transformer unit, an electric circuit is formed that connects the secondary side terminal 22 of the first terminal block 2 and the first input terminal 51 of the automatic transfer switch 5. This electric circuit includes the second commercial power line 12, the second terminal block 4, and the third commercial power line 13. In the main distribution board 1 for full load, the second terminal block 4 is provided in this electric circuit. As described above, the second terminal block 4 is connected to the first terminal block 2 and the automatic transfer 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, one end of which 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 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, a CT mounting space 9 is provided for arranging a CT122 that detects the current flowing through the second commercial power line 12. The detection result of the CT122 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, the CT122, the CT mounting space 9, and the second commercial power line 12 respectively correspond to the power supply device that generates power by gas power generation of the present invention, the first power supply line, the current detector, the mounting space, and the wiring for the current detector.

[0050] (Power supply system) FIG. 2 is an overall configuration diagram of a power supply system 200 including the main distribution board 1 for full load and the power storage system 100 shown in FIG. 1. As described above, the main 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 transfer switch 5, the breaker 6 for the transformer unit, and the breaker 7 for the main distribution board.

[0051] The power storage system 100 includes a 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 secondary battery, and for example, a lithium-ion battery or various other secondary batteries can be applied. The power conditioner 105 performs power conversion such as DC-AC conversion and step-up / step-down. The DC power generated by the solar cell 103 is converted into 200V 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 into the storage battery 101, and the DC power discharged from the storage battery 101 is converted into 200V AC power by the power conditioner 105 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 into the storage battery 101. The power conditioner 105 performs power conversion on the battery unit 102 and the PV unit 104, but may be provided with a power conditioner that performs power conversion on each of them. The detection result of a CT 107 that detects the current flowing through the first commercial power line 11 is input to the power conditioner 105 via the second current detection line 108. The transformer unit 106 converts the 200V AC power output from the power conditioner 105 into 100V AC power and inputs it to the second input terminal 52 of the automatic changeover switch 5 via the first transformer unit connection line 63, the breaker 6 for the transformer unit, and the second transformer unit connection line 64. 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. Also, the storage battery 101 and the solar cell 103 correspond to the distributed power sources of the present invention.

[0052] As described above, the fuel cell unit 120 outputs the electric power generated by the fuel cell and utilizes the heat generated during power generation for hot water supply or the like. The alternating current power output from the fuel cell unit 120 is input to the first input terminal 51 of the automatic changeover 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 can be controlled according to the power supplied from the commercial power system. Further, the fuel cell unit 120 includes a self-sufficient output terminal that outputs the electric power generated by the fuel cell unit 120 when the power supply from the commercial power system stops, and the power can be supplied to the load connected to this dedicated power outlet during power outage via the dedicated power outlet connected to this self-sufficient output terminal.

[0053] 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. The CT 122 connected to the fuel cell unit 120 is attached to the 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 parts of the CT 107 and the CT 122 in this way, the power storage system 100 and the fuel cell unit 120 can accurately obtain the information for their respective controls without being affected by the other system.

[0054] 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 changeover switch 5 of the main distribution board 1 for all loads, and the power supplied from the power storage system 100 is input to the second input terminal 52 of the automatic changeover switch 5 of the main distribution board 1 for all loads. As described above, the power storage system 100 and the fuel cell unit 120 can be independently controlled. Therefore, when power is being supplied from the commercial power system, in the automatic changeover switch 5, the first input terminal 51 is connected to the output terminal 53 By continuing, the fuel cell unit 120 is connected to the commercial power system, and according to the supplied power from the commercial power system and the power consumption of the general load 111, the power required for the general load 111 can be supplied. When the power supply from the commercial power system stops, by switching the automatic changeover switch 5 and connecting the second input terminal 52 to the output terminal 53, the power from the power storage system 100 can be supplied to the general load 111. Also, at this time, since the fuel cell unit 120 can also recognize the stop of the power supply from the commercial power system by CT122, it is also possible to supply power to the load connected to the dedicated outlet during a power outage independently of the power storage system 100.

[0055] In this way, it becomes possible to stably operate by further combining the fuel cell unit 120 with the main distribution board 1 for all loads that supplies power from the commercial power system and the storage battery 101 to the general load 111.

[0056] The power supply system 200 includes the main distribution board 1 for all loads and the power storage system 100, and the power supply system 200 may further include a fuel cell unit 120. Also, as a power supply device that is connected to the second terminal block 4 of the main distribution board 1 for all loads and can constitute the power supply system 200, it is not limited to the fuel cell unit 120, and various power supply devices such as a wind power generation device and other PV units can be applied. In FIG. 2, only one fuel cell unit 120 is shown as a power supply device that can be connected to the second terminal block 4 of the main distribution board 1 for all loads, but a plurality of power supply devices connected by cross wiring 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 PV units, or may be composed of one or a plurality of storage battery units including a storage battery unit. Also, the storage battery 101 and the storage battery unit 102 may be stationary type, or may be portable storage batteries and storage battery units mounted on an EV or the like. Further, the power supply system 200 can be configured to include the main distribution board 1 for all loads and at least one of the storage battery 101 and the solar cell 103, and instead of the power storage system 100, it may include a PV system composed of one or a plurality of PV units.

[0057] Note that in the following, in order to make it possible to compare the constituent elements of the present disclosure with the configuration of the embodiment, the constituent elements of the present disclosure are described with reference numerals in the drawings. <Appendix 1> A first input terminal (51) to which power supplied from a commercial power system is input, a second input terminal (52) to which power supplied from a distributed power source (101) is input, and an output terminal (53) to which power supplied to a load (111) is output, and an automatic switching switch (5) that switches the first input terminal (51) and the second input terminal (52) and connects them to the output terminal. A first terminal block (2) and a second terminal block (4) arranged in a circuit having one end connected to the commercial power system and the other end connected to the first input terminal (51). A main distribution board (1) for all loads provided with The first terminal block (2) has a first terminal (21) to which the other end of a first commercial power line (11) with one end connected to the commercial power system is connected, one end of a first distributed power source connection line (33) connecting the distributed power source (101) and the commercial power system, and a second terminal (22) to which one end of a second commercial power line (12) connecting the first terminal block (2) and the second terminal block (4) is connected. The second terminal block (4) has a third terminal (41) to which the other end of the second commercial power line (12) is connected, and a fourth terminal (42) to which one end of a third commercial power line (13) connecting the second terminal block (4) and the first input terminal (51) is connected. One end of a first power supply line (121) for supplying power supplied from a power supply device (120) can be connected to either the third terminal (41) or the fourth terminal (42). The main distribution board (1) for all loads is characterized in this.

Explanation of symbols

[0058] 1: Main distribution board for all loads 2: First terminal block 4: Second terminal block 5: Automatic changeover switch 9: CT mounting space 21: Primary side terminal 22: Secondary side terminal 41: Primary side terminal 42: Secondary side terminal 33: First energy storage system connection line 51: First input terminal 52: Second input terminal 53: Output terminal 101: Battery 111: General load 121: First power supply line

Claims

1. A commercial power line for incorporating a commercial power system, a first connection line section for taking in the output from a distributed power source and causing the taken-in output to pass through in a supplied state in which power is supplied from the commercial power system, and a second connection line section for causing the output to pass through in a stopped state in which the supply of power from the commercial power system has stopped, and a connection line including the second connection line section; a first power supply line for taking in the output from a power supply device, a load power line for supplying power to the general load side, an automatic changeover switch for switching between two inputs, a distribution board incorporating the above, within the distribution board, connecting the first connection line section to the commercial power line, and further connecting the first power supply line to the commercial power line to form a first electric circuit in which each line is in a connected state, forming a second electric circuit with the second connection line section, connecting the first electric circuit and the second electric circuit to each of the two inputs of the automatic changeover switch, and connecting the load power line to the output side, by switching the automatic changeover switch, in both the supplied state and the stopped state, while maintaining the connected state in the first electric circuit, in the supplied state, a first route for supplying power from the commercial power system, the output power of the distributed power source, and the output power of the power supply device to the general load side via the load power line through the first electric circuit is formed, and in the stopped state, a second route for supplying only the output power of the distributed power source among the power from the commercial power system, the output power of the distributed power source, and the output power of the power supply device to the general load side via the load power line through the second electric circuit is formed. A distribution board characterized by the above.

2. A space for attaching a current detector for detecting the current flowing through the connection point between the commercial power line and the first connection line section is formed in the middle between the connection point between the commercial power line and the first connection line section and the connection point between the commercial power line and the first power supply line. The distribution board according to claim 1.

3. A commercial power line for taking in a commercial power system, a first connection line part for taking in the output from a distributed power source and causing the taken-in output to pass through in a supply state in which power is supplied from the commercial power system, and a second connection line part for causing the output to pass through in a stop state in which the supply of power from the commercial power system has stopped; and a connection line including a first power supply line for taking in the output from a power supply device, a load power line for supplying power to the general load side, and an automatic changeover switch for switching between two supply routes to the load power line, A distribution board incorporating In the distribution board, a first electric circuit in which each line is in a connected state is formed by connecting the first connection line part to the commercial power line and connecting the first power supply line downstream of the connection point, and a second electric circuit is formed by the second connection line part. In the distribution board, a first space for attaching a current detector for a distributed power source for detecting the current supplied from the commercial power system into the distribution board is formed upstream of the connection point between the commercial power line and the first connection line part, and a second space for attaching a current detector for a power supply device for detecting the current flowing through the connection point between the commercial power line and the first connection line part is formed between the connection point between the commercial power line and the first connection line part and the connection point between the commercial power line and the first power supply line. By switching the automatic changeover switch, In both the supply state and the stop state, while maintaining the connection state in the first circuit, in the supply state, a first route for supplying power from the commercial power system, the output power of the distributed power source, and the output power of the power supply device to the general load side via the first circuit and the load power line is formed. In the stop state, only the output power of the distributed power source among the power from the commercial power system, the output power of the distributed power source, and the output power of the power supply device forms a second route for supplying power to the general load side via the second circuit and the load power line. A distribution board characterized by this.

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