WO2011055185A1

WO2011055185A1 - Power distribution system

Info

Publication number: WO2011055185A1
Application number: PCT/IB2010/002691
Authority: WO
Inventors: 裕明湯浅; 小新　博昭
Original assignee: パナソニック電工株式会社
Priority date: 2009-11-06
Filing date: 2010-10-21
Publication date: 2011-05-12
Also published as: JP2011101537A; JP5838318B2

Abstract

A power distribution system is provided with a direct-current power output means which outputs direct-current power generated by energy conversion from natural energy, and a power regulation means which is capable of executing the voltage regulation of the direct-current power outputted from the direct-current power output means and/or the power conversion thereof into alternating-current power. When an abnormality in the direct-current power output means and/or the power regulation means is detected, the power distribution system cuts off the power path between the direct-current power output means and the power regulation means.

Description

Specification Power Distribution System Technical Field

The present invention relates to a power distribution system. Background art

In recent years, a distribution system that distributes DC power to a load such as an electric light through a circuit from a distributed power source such as a solar cell or a fuel cell that generates DC power by converting energy from natural energy has attracted attention in addition to commercial power. In addition, such a power distribution system is equipped with a storage battery (secondary battery) as one of the distributed power sources so that power can be supplied to the load even in the event of a power failure when the power supply from the power system stops. There are some (for example, Patent Document 1).

In addition, the power distribution system disclosed in Patent Document 1 monitors the power flowing between the power supply and the load, and when an abnormality such as an overcurrent flows is detected, it protects the load. A breaker (shut-off means) is provided to shut off the power supply from the power source to the load.

[Patent Document 1] Japanese Patent Laid-Open No. 2 0 0 3-2 8 4 3 5 5

However, when an overcurrent that breaks off the breaker is detected on the circuit, the cause of the overcurrent is often caused by an abnormality that has occurred in the distributed power supply itself, resulting in an overcurrent. Such anomalies were often a serious problem for distributed power supplies. Summary of the Invention

The present invention has been made in view of the above points, and detects an abnormality in a distributed power source before detecting an abnormality that interrupts the circuit for supplying power from the power source to the load. Provide a power distribution system that can be automatically shut off.

According to the present invention, among DC power output means for outputting DC power generated by energy conversion from natural energy, voltage adjustment of DC power output from the DC power output means, and power conversion to AC power A power adjustment unit capable of executing at least one of the DC power output unit and the power adjustment unit, when an abnormality is detected in at least one of the DC power output unit and the power adjustment unit. A power distribution system that cuts off the circuit is provided.

Further, the power distribution system is configured to check whether there is an abnormality in at least one of the DC power output unit and the power adjustment unit, a blocking unit capable of cutting off an electric circuit between the DC power output unit and the power adjustment unit. An abnormality determining unit for determining, and a control unit for performing a blocking operation of the blocking unit when the abnormality determining unit determines that there is an abnormality may be further provided. According to this configuration, the control unit can control the blocking unit based on the determination result of the presence or absence of abnormality in at least one of the DC power output unit and the power adjustment unit by the abnormality determination unit. Therefore, it is possible to protect the load from excessive power caused by an abnormality in at least one of the DC power output means and the power adjustment means.

In addition, the abnormality determination unit may determine whether there is an abnormality that may be a sign that excessive power is output from the DC power output unit.

According to this configuration, before the excessive power is output from the DC power output means, the abnormality determination means can determine whether there is an abnormality in the DC power output means that can be a precursor to the occurrence of excessive power. It is possible to prevent excessive power from being output from the power output means to the electric circuit. As a result, the load can be protected from excessive power and the DC power output means can be protected.

Further, the power adjusting means can receive direct power from the plurality of DC power output means via the respective electric circuits, and a plurality of blocking means are provided for each of the electric circuits. And when the DC power output means among the DC power output means is determined to be abnormal, the control means is individually connected to the DC power output means determined to be abnormal. The shut-off means corresponding to may be shut off.

According to this configuration, since each of the plurality of DC power output means is provided with the cutoff means and the power adjustment means, when there is an abnormality in the DC power output means, an electric circuit is provided for each DC power output means. Can be blocked. Therefore, even if at least one of the plurality of DC power output means cannot be used due to an abnormality, the other DC power output means can be used. The DC power output means may include power generation means for generating DC power by energy conversion from natural energy, and power storage means capable of storing the DC power generated by the power generation means.

In addition, when the abnormality determination unit determines that there is an abnormality, the control unit may store the determination content in a predetermined storage unit.

According to this configuration, since the control unit can store the abnormality of the DC power output unit determined by the abnormality determination unit in the storage unit, the abnormality content of the DC power output unit can be easily confirmed.

In addition, when the abnormality determination unit determines that there is an abnormality, the control unit may notify the outside of the determination by a predetermined notification unit.

According to this configuration, when there is an abnormality in the DC power output means, the content of the abnormality can be notified to the outside. Therefore, the abnormality of the DC power output means can be easily recognized from the outside. The invention's effect

According to the present invention, before an abnormality is detected such that an electric circuit for supplying power from a power supply to a load is interrupted, an abnormality in a distributed power source can be detected to automatically interrupt the electric circuit. An electric system can be provided. Brief Description of Drawings

The objects and features of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an overall configuration of a power supply system according to an embodiment.

FIG. 2 is a block diagram illustrating a configuration of a power distribution system according to the present embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which form a part of this specification. Parts that are the same or similar throughout the drawings are given the same reference numerals, and descriptions thereof are omitted.

Hereinafter, embodiments embodying the present invention will be described with reference to FIGS.

As shown in Fig. 1, the house is equipped with a power supply system 1 as a power distribution system that supplies power to various devices (such as lighting equipment, air conditioners, home appliances, and audiovisual equipment) installed in the home. The power supply system 1 is used to operate various devices using a commercial AC power source (AC power source) 2 for home use as well as power from solar cells 60 (see Fig. 2) that generate electricity from sunlight. Supply as. The power supply system 1 supplies power not only to the DC device 5 that operates by inputting a DC power source (DC power source) but also to the AC device 6 that operates by inputting an AC power source (AC power source).

In the following description, a house is described as an example of a place where the power supply system 1 to which the power distribution system according to the present invention is applied is installed. However, the present invention is not limited to this. It can also be installed in factories.

The power supply system 1 is provided with a control unit 7 and a DC distribution board (built-in DC breaker) 8 as the distribution board of the system 1. In addition, the power supply system 1 is provided with a control unit 9 and a release unit 10 as devices for controlling the operation of the DC device 5 in the house.

The control unit 7 is connected to an AC distribution board 11 1 for branching an AC power supply via an AC power line 12. The control unit 7 is connected to the commercial AC power supply 2 via the AC distribution board 11 and connected to the solar cell unit 3 via the DC power line 13. The control unit 7 is connected to the fuel cell unit 4 via the DC power line 42. The control unit 7 receives AC power from the AC distribution board 11 1 and DC power from the solar cell unit 3 and the fuel cell unit 4, and converts these powers into predetermined DC power as a device power source. Then, the control unit 7 outputs the converted DC power to the DC distribution board 8 via the DC power line 14 or to the storage battery unit 16 via the DC power line 15. It stores the same power. The control unit 7 not only takes in AC power from the AC distribution board 11 but also direct current from the solar cell 60 (see Fig. 2), fuel cell 62 (see Fig. 2) and storage battery 63 (see Fig. 2). It is also possible to convert the power into AC power and supply it to the AC distribution board 11. Furthermore, between the solar cell unit 3, the fuel cell unit 4 and the storage battery unit 1 6 and the control unit 7, a blocking means for cutting off the electric circuit between each battery unit 3, 4, 1 6 and the control unit 7. As DC breakers 4 4 a to 4 4 c are connected. The control unit 7 exchanges data with the DC distribution board 8 via the signal line 17.

The DC distribution board 8 is a type of breaker that supports DC power. The DC distribution board 8 branches the DC power input from the control unit 7 and outputs the DC power after branching to the control unit 9 via the DC power line 18 or the DC power line 1 9 Or output to relay unit 10 via. In addition, the DC distribution board 8 exchanges data with the control unit 9 via the signal line 20 and exchanges data with the relay unit 10 via the signal line 21.

A plurality of DC devices 5 are connected to the control unit 9. These DC devices 5 are connected to a control unit 9 via a DC supply line 22 that can carry both DC power and data by a pair of wires. The DC supply line 22 is a so-called power line carrier communication that superimposes a communication signal for transmitting data by a high-frequency carrier wave on the DC voltage that serves as the power source for the DC device 5. Transport both to DC device 5. The control unit 9 acquires the DC power source of the DC device 5 through the DC power line 1 8, and which DC device 5 is selected based on the operation command obtained from the DC distribution board 8 through the signal line 20. Figure out how to control. Then, the control unit 9 outputs a DC voltage and an operation command to the instructed DC device 5 via the DC supply line 22, and controls the operation of the DC device 5.

The control unit 9 is connected to a switch 2 3 that is operated when switching the operation of the DC device 5 in the home via the DC supply line 2 2. Further, for example, a sensor 24 that detects a radio wave transmitted from an infrared remote controller is connected to the control unit 9 via a DC supply line 22. Accordingly, not only the operation instruction from the DC distribution board 8 but also the operation of the switch 23 and the detection of the sensor 24, the DC device 5 is controlled by sending a communication signal to the DC supply line 22.

A plurality of DC devices 5 are connected to the relay unit 10 via individual DC power lines 25, respectively. The relay unit 10 obtains the DC power source of the DC device 5 through the DC power line 19 and determines which DC device 5 based on the operation command obtained from the DC distribution board 8 through the signal line 21. Know what to do. Then, the relay unit 10 controls the operation of the DC device 5 by turning on / off the power supply to the DC power line 25 with the built-in relay for the instructed DC device 5. In addition, the relay unit 10 is connected to a plurality of switches 26 for manually operating the DC device 5, and the power supply to the DC supply line 25 is turned on and off by the relay by the operation of the switch 26. As a result, the DC device 5 is controlled. For example, a wall outlet or a floor outlet is connected to the DC distribution board 8 through a DC power line 2 8. If a DC device plug (not shown) is inserted into this DC outlet 27, DC power can be supplied directly to the device.

In addition, between the commercial AC power source 2 and the AC distribution board 1 1, an electric power meter 29 capable of remotely measuring the usage amount of the commercial AC power source 2 is connected. The power meter 29 has not only the function of remote meter reading of commercial power consumption, but also functions of power line carrier communication and wireless communication, for example. The power meter 29 sends the meter reading result to an electric power company or the like via power line carrier communication or wireless communication. The power supply system 1 is provided with a network system 30 that enables various devices in the home to be controlled by network communication. The network system 30 is provided with a home server 31 as a control unit of the system 30. The home server 3 1 is connected to a management server 3 2 outside the home via a network N such as the Internet, and is connected to the home equipment 3 4 via a signal line 3 3. In addition, the in-home server 31 operates using DC power acquired from the DC distribution board 8 via the DC power line 35 as a power source. A control box 36 that manages operation control of various devices in the home through network communication is connected to the home server 31 via a signal line 37. The control box 36 is connected to the control unit 7 and the DC distribution board 8 via the signal line 17 and can directly control the DC device 5 via the DC supply line 38. For example, a gas / water meter 39 that can remotely measure the amount of gas and water used is connected to the control box 36, and also connected to the operation panel 40 of the network system 30. The operation panel 40 is connected to a monitoring device 41 including, for example, a door phone slave, a sensor, and a camera.

When the home server 3 1 inputs operation commands for various devices in the home via the network N, the control box 3 6 notifies the control box 3 6 of the instructions so that the various devices operate in accordance with the operation commands. To work. In addition, the home server 3 1 can provide various information acquired from the gas water meter 39 to the management server 32 via the network N, and operate the monitoring device 41 to detect that an abnormality has been detected. When accepted from panel 40, this is also provided to management server 32 via network N.

Next, the control unit 7 will be described in detail.

As shown in FIG. 2, the control unit 7 includes various types of power supply systems 1 including a commercial AC power source 2 constituting a power system 2 and a solar cell unit 3, a fuel cell unit 4 and a storage battery unit 16 constituting a distributed power source. Distribution line (electric circuit) 4 3 that is connected to the load F and distributes power. The load F includes various components such as the DC device 5 and the AC device 6 as well as system components such as the controller unit, and the AC power line 1 2 and the DC power line 1 3 that supply power to them. The distribution path 4 3 is composed of ˜15, 18, 19, 25, 28, 35, 42, and the DC supply lines 22, 38. In addition, the control unit 7 efficiently supplies DC power generated by the solar cell unit 3 and the fuel cell unit 4 to the load F side, and at the same time, an active power conditioner (hereinafter referred to as an active power conditioner) for protecting the connection with the distribution system. , “Active supercomputer J” 50, and control device 51 for controlling the operating state of active supercomputer 50.

The active supercomputer 50 includes an AC / DC converter 52 that converts AC power supplied from the commercial AC power source 2 into DC power, and a D CZD C converter 53 a connected to the solar cell unit 3 and the fuel cell unit 4. 53 b. That is, DC power converted from AC power through the ACZDC converter 52 and DC power supplied from the solar cell unit 3 and the fuel cell unit 4 through the DCZDC converters 53a and 53b are transformed. The load is supplied to the F side. In this respect, the AC / DC converter 52 and the DC / DC converters 53a and 53b function as power adjusting means.

The active computer 50 includes a discharge circuit 54 for sending DC power discharged from the storage battery 63 of the storage battery unit 16 to the load F side, and a charging circuit as a charging means for charging the storage battery 63 of the storage battery unit 16. And 55. That is, since the storage battery 63 functions as an emergency power source during a power outage or the like, the DC power is always charged via the charging circuit 55, and the stored DC power is discharged during a power failure or the like. It is designed to be discharged to the load F side via 54.

Furthermore, the active computer 50 includes a power measurement circuit 56 having a sensor function for measuring the power flowing through the distribution path 43 and detecting an abnormality (overcurrent, overvoltage, temperature abnormality, etc.) in the 7 active computer 50. Yes. The power measurement circuit 56 outputs information such as the measured power value (current value or voltage value) and detected abnormality to the control device 51.

The control device 51 includes a storage unit 57 serving as a storage unit capable of reading and rewriting information, and a CPU 58 serving as a central processing unit. The storage unit 57 includes power input from the power measurement circuit 56. In addition to storing information indicating the state of the active computer 50 such as values and abnormality information, programs for the control device 51 to perform various controls are stored. Further, the control device 51 controls the ACZDC converter 52 and the D CZ DC converters 53 a and 53 b as necessary.

That is, the control device 51 determines the presence or absence of an abnormality that may be a precursor to the occurrence of excessive power such as leakage or overdischarge in the active computer 50 based on the information of the active computer 50 obtained by the power measuring circuit 56. . Then, the reactive computer 50 is controlled based on the determined abnormality. In this respect, the control device 51 functions as a determination unit and a control unit. Further, the control device 51 is connected to a monitor 59 as a notification means for displaying information stored in the storage unit 57 and a home server 31 for transmitting the information to the outside via the network N. ing. In FIG. 2, the control box 36 is omitted for the sake of simple illustration. However, referring to FIG. 1, it is obvious that the control device 51 is connected to the home server 31 via the control box 36. As shown in FIG. 2, the solar cell unit 3 includes a solar cell 60 as a power generation means for outputting DC power generated by energy conversion from solar energy, which is natural energy, and the electric power generated by the solar cell 60. The sensor 6 1a detects the state of the solar cell 60, such as the current value, the voltage value, the amount of solar radiation to the solar cell 60, and the temperature of the solar cell 60. The solar battery 60 is connected to the DCZDC converter 53a via a DC breaker 44a. Further, the sensor 61a is connected to the control device 51, and outputs the detected state of the solar cell 60 to the control device 51.

The fuel cell unit 4 includes a fuel cell 6 2 as a power generation means and a sensor 6 1 b. The fuel cell 62 outputs DC power generated by a chemical reaction between hydrogen and oxygen from a fuel gas (for example, reformed gas rich in hydrogen) and an oxidant gas (for example, air containing oxygen). The sensor 6 1 b measures the current value and voltage value of the electric power generated by the fuel cell 6 2 and detects the state of the fuel cell 6 2, for example, the temperature of the fuel cell 6 2. The fuel cell 62 is connected to the DC / DC comparator 53b through the DC breaker 44b. The sensor 6 1 b is connected to the control device 51, and outputs the measured and detected state of the fuel cell 62 to the control device 51.

The storage battery unit 16 measures the current value and the voltage value of the storage battery 63 as chargeable / dischargeable storage means, the current and voltage of the storage battery 63 when charging and storage, and the state of the storage battery 63, for example, And a sensor 6 1 c for detecting the temperature of the storage battery 6 3. The storage battery 63 is connected to the discharge circuit 54 and the charging circuit 55 via the DC breaker 44c. The sensor 6 1 c is connected to the control device 51, and outputs the measured and detected charge / discharge amount of the storage battery 63 and the state of the storage battery 63 to the control device 51. Thus, the solar cell 60, the fuel cell 62, and the storage battery 63 function as DC power output means.

Then, the control device 51 uses each of the battery units 3, 4, and 16 in the same manner as the active computer 50 based on the input states of the solar cell 60, the fuel cell 62, and the storage battery 63. In addition to determining whether there is an abnormality that can be a sign of excessive power generation, the storage unit 57 stores the state of each battery and the determination result. Then, each DC breaker 4 4 a to 4 4 c is controlled based on each discrimination result.

Thus, in this embodiment, the control unit 7, the solar cell unit 3, the fuel cell unit 4, the storage battery unit 16 and the DC breakers 4 4a to 4a provided with the active supercomputer 50 and the control device 51. 4 4 c constitutes the power distribution system.

Next, the determination of the presence / absence of abnormality by the control device 51 and the electric circuit interruption control at the time of abnormality determination will be described.

The control device 51 determines whether there is an abnormality based on the status of the solar cell unit 3, the fuel cell unit 4, the storage battery unit 16 and the active computer 50. The circuit breakers 4 4 a to 4 4 c connected to 3, 4, and 16 and the active supercomputer 50 are controlled. That is, the control device 51 includes each sensor 6 of each battery unit 3, 4, 16. 1 a-61 c and active battery 50 Based on information indicating the status of each device such as current value, voltage value, temperature, etc. measured and detected by power measuring circuit 56 of each battery unit 3, 4, 1 6 In addition, it is determined whether or not there is an abnormality in the active computer 50 that may be a precursor to the occurrence of excessive power.

If it is determined that there is no abnormality in each of the battery units 3, 4, 1 6 and the active supercomputer 50, the control device 51 sends the corresponding DC / DC converter 53a from each of the battery units 3, 4, 1 6 , 53 b and discharge circuit 54 to output DC power and supply power to load F. On the other hand, if it is determined that there is an abnormality in each battery unit 3, 4, 1 6, the control device 51 first starts the DC-DC converter 53a, connected to the battery unit that has been determined to have such an abnormality. 53 b or the discharge circuit 54 is controlled, and the output of DC power from the corresponding DC / DC comparator 53 a, 53 b or the discharge circuit 54 is stopped. Then, the DC breaker connected to the unit determined to be abnormal is activated to cut off the corresponding DC power line. Here, the process of controlling the DC / DC converters 53a, 53b or the discharge circuit 54 connected to the battery unit that has been determined to be abnormal and stopping the output can be omitted.

When it is determined that there is an abnormality in the active computer 50, the operation of the active computer 50 is stopped. Then, the DC bracing forces 44 a to 44 c connected to the battery units 3, 4, 16 are operated to cut off the DC power lines 1, 42, 15.

Further, the control device 51 stores the input information indicating the state of each of the battery units 3, 4, 16 and the active computer 50 and the presence / absence of the determined abnormality in the storage unit 57, and manages the abnormality log and the like. . Then, the stored states of the battery units 3, 4, 16 and the active computer 50 are output to the monitor 59 and the home server 31 together with the presence / absence of an abnormality.

Next, an example of what to do when an abnormality occurs in the power distribution system is described. For example, when power generation is performed in the solar cell unit 3, first, each of the current value, the voltage value, the amount of solar radiation to the solar cell 60, and the temperature of the solar cell 60 is generated. The value is detected by the sensor 61a, and the theoretical power amount to be generated is calculated by the control device 51 from each detected value. Then, the calculated theoretical voltage amount is compared with the actual power generation amount, and the presence or absence of abnormality in the solar battery 60 is determined. When the theoretical voltage amount and the actual power generation amount are significantly different, it is determined that the solar cell 60 is abnormal. Then, the DC power 44a corresponding to the solar cell 60 is activated, and the DC power line 13 connected to the DCZDC converter 53a is cut off. Therefore, the supply of DC power from the solar cell 60 to the distribution line 43 including the DC system power line 13 is stopped, and the load F and the solar cell 60 main body are protected.

At this time, the control device 51 transmits (outputs) information indicating the state of the solar cell 60 together with the presence or absence of abnormality in the solar cell 60 to the monitor 59, and the information is displayed on the screen of the monitor 59. Therefore, the user can visually recognize the presence / absence of an abnormality and the device and cause of the abnormality by viewing the monitor 59. In addition, when power generation is performed in the fuel cell unit 4, the current value, the voltage value, and the temperature value of the fuel cell 62 generated by the fuel cell 62 are detected by the sensor 61b. Whether or not there is an abnormality is determined based on whether or not each detected value is equal to or greater than a predetermined abnormality threshold. When each detected value is equal to or greater than a predetermined abnormality threshold, it is determined that the fuel cell 62 is abnormal. Then, similarly to the case of the solar cell unit 3, the corresponding DC breaker 44b is operated to cut off the DC power line 42 connected to the DCZDC converter 53b. Therefore, the supply of DC power from the fuel cell 62 to the distribution line 43 including the DC power line 42 is stopped, and the load F and the fuel cell 62 main body are protected.

In addition, when DC power is being sent from the storage battery unit 16 to the load F side via the discharge circuit 54, the current value, voltage value, and temperature of the storage battery 63 of the DC power sent from the storage battery unit 16 are Each value is detected by the sensor 61c, and whether or not there is an abnormality is determined based on whether or not each detected value is equal to or greater than a predetermined abnormality threshold value. As in the case of the fuel cell unit 4, when each detected value is equal to or greater than a predetermined abnormality threshold, it is determined that the storage battery 63 is abnormal. Then, as in the case of the solar cell unit 3 and the fuel cell unit 4, the corresponding DC breaker 44c is operated, and the DC power line 15 connected to the discharge circuit 54 and the charging circuit 55 is cut off. The Therefore, the supply of DC power from the storage battery 63 to the distribution line 43 including the DC power line 15 is stopped, and the load F and the storage battery 63 main body are protected. In the active computer 50, whether or not there is an abnormality is determined based on whether or not the current value, voltage value, temperature of the active computer 50, etc. detected by the power measuring circuit 56 are equal to or higher than a predetermined abnormality threshold. The Then, when the detected value is equal to or greater than a predetermined abnormality threshold, it is determined that the active computer 50 is abnormal. In this case, all DC breakers 44a to 44c corresponding to the units 3, 4, 16 are operated, and the DC power lines 1, 3, 42, 15 are shut off. As a result, the supply of DC power to the distribution circuit 43 including the DC power lines 13, 4, 42, and 15 is stopped, and the load F, the active capacitor 50, and the batteries 60, 62, and 63 are protected.

According to the embodiment described above, the following effects can be obtained.

(1) In the power supply system (distribution system) 1 of the present embodiment, the control device 51 determines whether there is an abnormality in the solar cell unit 3, the fuel cell unit 4, the storage battery unit 16 and the active battery 50. Based on the result of the discrimination, each battery unit 3, 4,

DC breakers 44 a to 44 c corresponding to 1 6 are controlled to cut off DC power lines 1, 42, 1 5. For this reason, it is possible to protect the load F from excessive power caused by an abnormality in at least one of the battery units 3, 4, 16 and the active supercomputer 50.

(2) In the power supply system 1 of the present embodiment, before the excessive power is output from the solar cell unit 3, the fuel cell unit 4, and the storage battery unit 16, each battery unit 3, which can be a sign of excessive power generation 3, The control device 51 determines whether there are any abnormalities in 4, 16 and the active computer 50. For this reason, each battery unit 3, 4, 1 6 serving as DC power output means is connected to the power distribution path. Since it is possible to prevent excessive power from being output to 4 3, it is possible to protect the load F from excessive power and protect each of the battery units 3, 4, 16 and the active computer 50.

(3) In the power supply system 1 of the present embodiment, DC breakers 4 4 a to 4 4 c are connected to each of the solar cell unit 3, the fuel cell unit 4, and the storage battery unit 16. For this reason, when there is an abnormality in each battery unit 3, 4, 16, the distribution path 4 3 can be shut off for each battery unit 3, 4, 16. , 16 If at least one of the six cannot be used due to an abnormality, other battery units can be used.

(4) In the power supply system 1 according to the present embodiment, the control device 51 stores the abnormalities of the identified solar cell unit 3, fuel cell unit 4, storage battery unit 16 and active battery 50 in the storage unit 5 7 can be memorized. Therefore, the history of abnormal contents in each of the battery units 3, 4, 16 and the active computer 50 can be easily confirmed by reading information from the storage unit 57.

(5) In the power supply system 1 of the present embodiment, the presence / absence of an abnormality determined based on the state of the solar cell unit 3, the fuel cell unit 4, the storage battery unit 16 and the active computer 50, and the state of each device And the details of the error are displayed on the monitor 59. For this reason, the abnormality of the power supply system 1 can be easily recognized by the monitor 59.

The above embodiment may be changed to another embodiment as described below.

• In the above embodiment, the presence or absence of abnormality in the power supply system (distribution system) 1 may be notified to the outside by generating an alarm sound by a buzzer or the like.

In the above embodiment, the presence or absence of abnormality of the storage battery unit 16 may be determined based on the battery life of the storage battery 63.

In the above embodiment, the state (current value, voltage value, etc.) of the fuel cell unit 4 and the storage battery unit 16 may be detected by the power measuring circuit 56 of the active computer 50.

■ In the above embodiment, the power supply system (distribution system) 1 outputs at least one of the solar cell 60, the fuel cell 62, and the storage battery 63 as direct power collection means for outputting direct current power. .

In the above embodiment, notifying means for notifying the outside of the abnormality of the power supply system (distribution system) 1 is not necessarily provided.

• In the above embodiment, the abnormality content of the power supply system (distribution system) 1 may not be stored in the storage unit 57.

In the above embodiment, the DC breakers 4 4 a to 4 4 c need not be provided for each battery unit of the power supply system (distribution system) 1.

In the above embodiment, the control device 51 determines whether or not there is an abnormality that can be a precursor to the occurrence of leakage or excessive power output in the solar cell unit 3, the fuel cell unit 4, and the storage battery unit 16. Based on the detection result of at least one of current, voltage, and temperature It may be determined.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to these specific embodiments, and various changes and modifications can be made without departing from the scope of the subsequent claims. Yes, it can be said to belong to the category of the present invention.

Claims

The scope of the claims

[Claim 1]

DC power output means for outputting DC power generated by energy conversion from natural energy,

Power adjustment means capable of executing at least one of voltage adjustment of DC power output from the DC power output means and power conversion to AC power, and

A power distribution system that cuts off an electric circuit between the DC power output means and the power adjustment means when an abnormality is detected in at least one of the DC power output means and the power adjustment means.

[Claim 2]

A disconnecting means capable of interrupting an electric path between the DC power output means and the power adjusting means; an abnormality determining means for determining presence / absence of an abnormality in at least one of the DC power output means and the power adjusting means;

Control means for causing the shut-off means to shut off when the abnormality judging means determines that there is an abnormality.

The power distribution system according to claim 1.

[Claim 3]

The abnormality determination unit determines whether there is an abnormality that can be a precursor to output of excessive power from the DC power output unit.

The power distribution system according to claim 2.

[Claim 4]

The power adjusting means is capable of inputting DC power from each of the plurality of DC power output means via each electric circuit, and is provided with a plurality of blocking means corresponding to each electric circuit, The control means individually corresponds to the DC power output means determined to be abnormal when any one of the DC power output means is determined to be abnormal by the abnormality determination means. Shut off the shut off means

The power distribution system according to claim 2 or claim 3.

[Claim 5]

The DC power output means includes a power generation means for generating DC power by energy conversion from natural energy, and a power storage means capable of storing the DC power generated by the power generation means.

The power distribution system according to any one of claims 2 to 4.

[Claim 6]

When the abnormality determination unit determines that there is an abnormality, the control unit stores the determination content in a predetermined storage unit. The power distribution system according to any one of claims 2 to 5.

[Claim 7]

When the abnormality determining means determines that there is an abnormality, the control means causes the predetermined notification means to notify the outside of the determination contents.

The power distribution system according to any one of claims 2 to 6.