JP2010041784A - Power distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power distribution system capable of improving the efficiency of using power. <P>SOLUTION: An AC power distribution panel 3 is connected to a commercial power supply AC, and is used as a connection port of AC power from the commercial power supply AC. A DC power supply 4 generates DC power. A switching device 6 switches the connection source of a power supply line L1 to which an electric apparatus 1a is connected between an AC power supply main line Lac as a power supply path of AC power from the power distribution panel 3 and a DC power supply main line Ldc as a power supply path of DC power from the DC power supply 4. When the power supply line L1 is connected to the AC power supply main line Lac, the power on the power supply line L1 becomes AC power. At the same time, when the power supply line L1 is connected to the DC power supply main line Ldc, the DC power from the DC power supply 4 is supplied to the power supply line L1 without being converted into AC power, and the power on the power supply line L1 becomes DC power. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power distribution system for supplying electric power to an electrical device.

As a conventional power distribution system for supplying electric power to an electric device, means for supplying AC power from a commercial power source to the electric device, a DC power source (for example, a solar cell) that generates DC power, and DC power from the DC power source to AC power There is known a system that includes an inverter for converting to AC and supplies AC power converted by the inverter to an electric device along with AC power of a commercial power source via a current supply line (see, for example, Patent Document 1).
JP 2004-260913 A

  However, in the conventional power distribution system, since the DC power of the DC power source is converted into AC power by the inverter, a loss due to power conversion occurs. As a result, the conventional power distribution system has a problem that power utilization efficiency is lowered.

  In particular, in an electric device including a main operation unit that operates by being supplied with DC power, AC power supplied from a power supply line is converted into DC power. For this reason, in the inverter, the DC power of the DC power source is converted into AC power, and in the electric equipment, AC power is converted into DC power twice, and the power use efficiency is lowered. .

  This invention is made | formed in view of said point, The objective is to provide the power distribution system which can improve the utilization efficiency of electric power.

  The invention according to claim 1 is a power supply line to which a power receiving terminal for both AC and DC is connected, a power supply connecting means connected to a commercial power supply, a DC power supply including a power generator for generating DC power, and the power supply line And a switching device for switching the upper power between AC power from the commercial power source and DC power from the DC power source.

  According to a second aspect of the present invention, in the first aspect of the present invention, the power receiving side terminal is connected to an electrical device and whether the power supplied from the power supply line is AC power or DC power. The detection means for detecting the type of the supplied power, and the type of the supplied power when the type of the supplied power detected by the detection means and the type of the required power required by the electric device are different. It has the electric power adaptation means converted into a kind and supplied to the said electric equipment, It is characterized by the above-mentioned.

  According to a third aspect of the present invention, in the second aspect of the present invention, the power receiving side terminal is an outlet connected to the power supply line.

  The invention of claim 4 is characterized in that, in the invention of claim 2, an outlet connected to the power supply line is provided, and the power receiving terminal is an adapter connected to the outlet.

  According to a fifth aspect of the present invention, in the first aspect of the invention, the power receiving side terminal is provided integrally with the electric device, and the electric device is configured such that the power supplied from the power supply line is AC power or DC power. Detecting means for detecting the type of the supplied power, and the type of the supplied power when the type of the supplied power detected by the detecting means and the type of required power required by the electric device are different. It has the electric power adaptation means which converts into the kind of the said required electric power, and supplies it to the said electric equipment, It is characterized by the above-mentioned.

  According to a sixth aspect of the present invention, in the invention according to any one of the second to fifth aspects, the power adapting unit converts the type of the supplied power into a conversion unit and the supply power through the conversion unit. When the switching unit that switches whether or not to supply to an electric device, and the type of the supplied power detected by the detection unit and the type of the required power are the same, the supply power is not transmitted through the conversion unit. When the switching unit is controlled to be supplied to the electrical device, and the type of the supplied power detected by the detection unit is different from the type of the required power, the supplied power is supplied via the conversion unit. And a switching control unit that supplies the electric device.

  According to a seventh aspect of the present invention, in the sixth aspect of the invention, the type of the required power of the electric device is DC power, and the power adapting means is that the supplied power detected by the detecting means is DC power. A voltage adjusting unit that adjusts the magnitude of the voltage of the supplied power to the voltage of the required power and supplies the voltage to the electric device, and the voltage switching control unit is detected by the detection unit When the supplied power is DC power, control is performed so that the supplied power is supplied to the electric device via the voltage conversion unit.

  The invention according to claim 8 is the invention according to claim 1, wherein the power receiving side terminal is an electric device for both AC and DC.

  The invention of claim 9 is the invention of any one of claims 1 to 8, further comprising direct-current power detection means for detecting the amount of direct-current power generated by the direct-current power supply, wherein the switching device comprises the direct-current power detection When the detected value of the means is greater than or equal to a preset DC power reference value, the power on the power supply line is switched to DC power from the DC power supply.

  The invention of claim 10 is the invention of any one of claims 1 to 8, further comprising a power failure detection means for detecting a power failure of the commercial power supply, wherein the switching device is a power failure of the commercial power supply by the power failure detection means. Is detected, the power on the power supply line is switched to DC power from the DC power supply.

  The invention of claim 11 is the invention of any one of claims 1 to 8, further comprising AC power detection means for detecting the magnitude of AC power from the commercial power supply, wherein the switching device is configured to detect the AC power detection. When the detected value of the means is greater than or equal to a preset threshold value, the power on the power supply line is switched to DC power from the DC power supply.

  According to the invention of claim 1, the switching device switches the power on the power supply line to which the AC / DC power receiving side terminal is connected between the AC power from the commercial power source and the DC power from the DC power source, Since AC power from a commercial power source and DC power from a DC power source can be supplied to the receiving terminal as they are, power loss due to conversion between DC power and AC power can be reduced, and power use efficiency Can be increased.

  According to the invention of claim 2, by converting the power supplied from the power supply line into the same type of power as the required power of the electrical equipment, the power on the power supply line is DC power even if the power is AC power. However, the electric power (AC power or DC power) required by the electric equipment can be supplied.

  According to the invention of claim 3, since the power receiving terminal is an outlet, it is not necessary to provide the electric device with a power conversion function for converting the type of electric power, so that the conventional electric device can be used. .

  According to the fourth aspect of the present invention, since the power receiving terminal is an adapter, it is not necessary for the electric device to have a power conversion function for converting the type of electric power, so that a conventional electric device can be used. .

  According to the invention of claim 5, since the power receiving side terminal is provided integrally with the electric device, it is not necessary to prepare the power receiving side terminal as a separate product.

  According to the sixth aspect of the invention, the power supplied from the power supply line is converted into the same type of power as the required power of the electrical equipment, so that the power on the power supply line is DC power even if the power is AC power. However, the electric power (AC power or DC power) required by the electric equipment can be supplied.

  According to the seventh aspect of the present invention, the voltage of the required power of the electric device is adjusted to the value of the supplied power by adjusting the magnitude of the voltage of the DC power that is the power supplied from the power supply line to the voltage of the required power. Even if the voltage is different from the voltage, DC power suitable for the electric device can be supplied to the electric device.

  According to the invention of claim 8, since the electric device can operate regardless of whether AC power is supplied to the electric device or DC power is supplied, the detection means necessary for converting the type of the supplied power And no power adapting means.

  According to the invention of claim 9, if the DC power supply has a sufficient supply capability, DC power can be supplied to the power receiving side terminal, so that the amount of AC power used from the commercial power supply can be reduced, As a result, the electricity bill can be reduced.

  According to the invention of claim 10, since the DC power from the DC power source can be supplied to the power receiving side terminal even during the power failure of the commercial power source, the influence of the power failure of the commercial power source can be reduced.

  According to invention of Claim 11, when the magnitude | size of alternating current power becomes more than a threshold value, the switching apparatus will switch the electric power on a power supply line to the direct current power from direct current power supply, and the peak of alternating current power from commercial power supply will be carried out. Since it can suppress, an electricity bill can be reduced.

(Embodiment 1)
A configuration of the power distribution system according to the first embodiment will be described. As shown in FIG. 1, this power distribution system is a system that is installed in a house H and supplies power to a plurality of electric devices 1a and 1b, and a power supply line L1 to which each electric device 1a is electrically connected, A power supply line L2 to which the electrical equipment 1b is electrically connected, a plurality of outlets (outlets) 2a and 2b provided connected to the power supply lines L1 and L2, and an AC distribution board connected to the commercial power source AC 3, a DC power supply 4 including a power generation device that generates DC power, a management device 5 that manages the DC power supply 4, and a switching device 6 that switches power on the power supply line L <b> 1 between AC power and DC power. I have. In the present embodiment, the outlets 2a and 2b are shown as outlets, but the hooking ceiling for attaching the lighting fixture is also included in the outlets.

  Each electric device 1a is an AC / DC electric device including a main operation unit 10a that operates regardless of whether AC power is supplied or DC power and a plug 11a that is connected to the outlet 2a. Each electric appliance 1a corresponds to a power receiving side terminal of the present invention. On the other hand, the electrical device 1b is an electrical device for alternating current provided with a main operation unit 10b that operates only when AC power is supplied and a plug 11b for connection to the outlet 2b.

  Each outlet 2a, 2b is provided with a plurality of plug insertion holes 20a, 20b into which plugs are inserted, and the plugs 11a, 11b of the electric devices 1a, 1b are inserted into the respective plug insertion holes 20a, 20b. Electrical devices 1a and 1b are connected to the outlets 2a and 2b.

  The AC distribution board 3 includes a main breaker 30, breakers 31 and 31, and an AC power detection unit (AC power detection means) 32 that detects the magnitude of AC power from the commercial power source AC. The AC distribution board 3 corresponds to the power connection means of the present invention.

  The AC power detection unit 32 transmits a peak power signal to the switching device 6 when the detected value is equal to or greater than a preset threshold value. For example, if the threshold is set to 80% to 90% of the contract power instead of the contract power itself, the AC power from the commercial power source is prevented from exceeding the contract power by the operation described later. Can do.

  The AC power detection unit 32 is also a power failure detection unit that detects a power failure and power failure recovery of the commercial power source AC. The AC power detection unit 32 that has detected a power failure of the commercial power supply AC transmits a power failure signal to the switching device 6. Thereafter, the AC power detection unit 32 that has detected the recovery from the power failure transmits a power failure recovery signal to the switching device 6.

  Here, the AC power supply main line Lac, which is a power supply path from the AC distribution board 3 for AC power generated by the commercial power supply AC, is also used as a communication path. The AC power detection unit 32 is connected to the AC power supply main line Lac by superimposing a communication signal (peak power signal, power failure signal, power failure recovery signal) that transmits data using a high-frequency carrier wave on the AC voltage. Communication with the switching device 6 is enabled.

  The DC power source 4 includes a solar cell 40 and a fuel cell 41 that generate DC power, and a secondary battery 42 that is charged with DC power.

  The management device 5 detects the amount of DC power generated by the DC power supply 4. The management device 5 transmits a supply enable signal to the switching device 6 when the detected value is equal to or greater than a preset reference value. The management device 5 corresponds to the DC power detection means of the present invention.

  Here, the DC power supply main line Ldc, which is a power supply path from the DC power supply 4 for the DC power generated by the DC power supply 4, is also used as a communication path. The management device 5 communicates with the switching device 6 connected to the DC power supply main line Ldc by superimposing a communication signal (a suppliable signal) for transmitting data using a high-frequency carrier wave on the DC voltage. Is possible. This technique is similar to a power line carrier technique in which a communication signal is superimposed on an AC voltage in a power line that supplies AC power.

  As illustrated in FIG. 2, the switching device 6 includes a first communication unit 60 that performs communication with the AC power detection unit 32, a second communication unit 61 that performs communication with the management device 5, and A switching unit 62 and a control unit 63 that controls the switching unit 62 are provided. The switching device 6 is housed in the DC distribution board B together with the management device 5 (see FIG. 1).

  The first communication unit 60 receives the peak power signal transmitted from the AC power detection unit 32 when the detection value of the AC power detection unit 32 reaches the threshold value. Further, the first communication unit 60 receives a power failure signal transmitted from the AC power detection unit 32 when the AC power detection unit 32 detects a power failure of the commercial power supply AC. Furthermore, the first communication unit 60 receives from the AC power detection unit 32 a power failure recovery signal that is transmitted when the AC power detection unit 32 detects the recovery of the commercial power supply AC.

  The second communication unit 61 receives from the management device 5 a supplyable signal that is transmitted when the detection value of the management device 5 is greater than or equal to the reference value.

  The control unit 63 controls the switching unit 62 so as to switch the connection source of the power supply line L1 between the AC power supply main line Lac and the DC power supply main line Ldc.

  In particular, when the peak power signal is received by the first communication unit 60 when the connection source of the power supply line L1 is the AC power supply main line Lac, the control unit 63 determines the connection source of the power supply line L1. By controlling the switching unit 62 to switch from the AC power supply main line Lac to the DC power supply main line Ldc, the power on the power supply line L1 is changed from AC power from the commercial power supply AC to DC power from the DC power supply 4. Switch.

  In addition, when a power failure signal is received by the first communication unit 60, the control unit 63 controls the switching unit 62 so that the connection source of the power supply line L1 is the DC power supply main line Ldc. The power on the supply line L1 is changed to DC power from the DC power supply 4. Thereafter, when the power failure recovery signal is received by the first communication unit 60, the control unit 63 switches the connection source of the power supply line L1 from the DC power supply main line Ldc to the AC power supply main line Lac. By controlling 62, the power on the power supply line L1 is switched from DC power to AC power.

  On the other hand, when the connection source of the power supply line L1 is the AC power feeding main line Lac and the second communication unit 61 receives a supplyable signal, the control unit 63 determines the connection source of the power supply line L1. The power on the power supply line L1 is switched to the DC power from the DC power supply 4 by controlling the switching unit 62 so as to switch from the AC power supply main line Lac to the DC power supply main line Ldc.

  As described above, according to this embodiment, the switching device 6 switches the power of the power supply line L1 to which the AC / DC electric device 1a is connected between the AC power from the commercial power source AC and the DC power from the DC power source 4. Thus, the DC power from the DC power source 4 and the DC power from the DC power source 4 are directly converted into the DC power from the commercial power source AC without converting the DC power from the DC power source 4 into AC power and converting it again into DC power. Since it can supply to 1a, the power loss by conversion between direct-current power and alternating current power can be reduced, and the utilization efficiency of electric power can be improved.

  In addition, according to the present embodiment, if the DC power supply 4 has a sufficient supply capability, DC power can be supplied to each electrical device 1a, so that the amount of AC power used from the commercial power supply AC can be reduced. As a result, the electricity bill can be reduced.

  Furthermore, according to the present embodiment, since the DC power from the DC power supply 4 can be supplied to each electrical device 1a even during a power failure of the commercial power supply AC, the influence of the power failure of the commercial power supply AC can be reduced. it can. And after commercial power supply AC recovers from a power failure, the alternating current power from commercial power supply AC can be supplied to each electric equipment 1a.

  In addition, according to the present embodiment, when the magnitude of the AC power becomes equal to or greater than the threshold, the switching device 6 switches the power on the power supply line L1 to the DC power from the DC power supply 4, whereby the AC from the commercial power supply AC. Since the power peak can be suppressed, the electricity cost can be reduced.

  Furthermore, according to this embodiment, since the electric device 1a can operate regardless of whether AC power is supplied to each electric device 1a or DC power is supplied, a function for converting the type of supplied power Is unnecessary.

  As a modification of the first embodiment, a timer (time measuring means) that measures the current time, an AC supply time zone in which the power on the power supply line L1 is AC power, and the power on the power supply line L1 are converted to DC power. And a storage unit (storage means) for storing the DC supply time zone. In this configuration, the control unit 63 of the switching device 6 switches the connection unit of the power supply line L1 to the AC power feeding main line Lac when the current time measured by the timer is included in the AC supply time zone. 62 is controlled. On the other hand, when the current time measured by the timer is included in the DC supply time zone, the control unit 63 controls the switching unit 62 so that the connection source of the power supply line L1 is the DC power supply main line Ldc. The same applies to the following second to fourth embodiments.

  According to the configuration of the modified example, it is possible to perform power supply in accordance with the user's intention. For example, when the AC supply time zone is set to midnight when the electricity bill is cheap, the electricity bill can be reduced.

  Moreover, you may provide the illumination intensity sensor which detects the illumination intensity of external light as another modification of Embodiment 1. FIG. In this configuration, when the illuminance detection value of the illuminance sensor is equal to or higher than a preset illuminance reference value, the control unit 63 of the switching device 6 sets the connection source of the power supply line L1 to the DC power supply main line Ldc. The switching unit 62 is controlled. On the other hand, when the illuminance detection value of the illuminance sensor is less than the illuminance reference value, the control unit 63 controls the switching unit 62 so that the connection source of the power supply line L1 is the AC power supply main line Lac. The same applies to the following second to fourth embodiments.

  According to the configuration of the other modified example described above, when the illuminance of external light is high, the solar cell 40 can generate sufficient DC power, so that the DC power can be used effectively.

(Embodiment 2)
As shown in FIG. 3, the power distribution system according to the second embodiment is different from the power distribution system according to the first embodiment (see FIG. 1) in that adapters 7 a and 7 b connected to the outlet 2 a are provided. In addition, about the component similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  Similarly to the first embodiment, the electric device 1b is an AC electric device to which AC power is supplied and the main operation unit 10b operates. The required power of the main operation unit 10b of the electric device 1b is AC power. On the other hand, the electric device 1c is a direct-current electric device that is supplied with direct-current power and operates the main operation unit 10c. The required power of the main operation unit 10c of the electric device 1c is DC power.

  The adapter 7a includes a plug 70a for connecting to the outlet 2a and a plug insertion hole 71a to which the AC electrical device 1b is connected, and an AC device adapter having a built-in AC power supply block 8 to be described later. It is. The adapter 7b includes a plug 70b for connecting to the outlet 2a and a plug insertion hole 71b to which the DC electric device 1c is connected, and includes a DC power supply block 9 to be described later. It is.

  The AC power supply block 8 includes a first AC power supply path 80 for supplying AC power from the power supply line L1 to the electric device 1b, and a second AC power supply connected in parallel to the first AC power supply path 80. A path 81, an inverter (converter) 82 that is inserted into the second AC power supply path 81 and converts DC power from the power supply line L1 into AC power, and detection that detects the type of power supplied from the power supply line L1 Unit (detection means) 83, a switching unit 84, and a control unit (switching control unit) 85 that controls the switching unit 84.

  The second AC power supply path 81 is for supplying the AC power converted by the inverter 82 to the electric device 1b.

  The detection unit 83 detects whether the supplied power is AC power or DC power as detection of the type of supplied power.

  The switching unit 84 switches whether to supply power to the electric device 1b via the inverter 82.

  When the detection unit 83 detects that the power on the power supply line L1 is AC power, the control unit 85 determines that the electrical device 1b connected to the adapter 7a is an AC electrical device. The switching unit 84 is controlled so as to switch the connection destination of the power supply line L <b> 1 to the first AC feeding path 80. That is, the supply power that is AC power is supplied to the electric device 1b as it is.

  On the other hand, when the detection unit 83 detects that the power on the power supply line L1 is DC power, the control unit 85 switches the connection destination of the power supply line L1 to the second AC power supply path 81. 84 is controlled. That is, the supplied power that is DC power is converted into AC power by the inverter 82, and the converted AC power is supplied to the electrical device 1b.

  The DC power supply block 9 includes a first DC power supply path 90 for supplying DC power from the power supply line L1 to the electric device 1c, and a second DC power supply connected in parallel to the first DC power supply path 90. Inserted into the path 91, the DC / DC converter (voltage adjustment unit) 92 that is inserted into the first DC power supply path 90 and adjusts the magnitude of the DC power from the power supply line L 1, and is inserted into the second DC power supply path 91. AC / DC converter 93 that converts AC power from the power supply line L1 into DC power, a detection unit (detection means) 94 that detects the type of power supplied from the power supply line L1, a switching unit 95, and a switching unit The control part (switching control part) 96 which controls 95 is provided.

  The first DC power supply path 90 is for supplying the DC power converted by the DC / DC converter 92 to the electric device 1c. The second DC power supply path 91 is for supplying the DC power converted by the AC / DC converter 93 to the electric device 1c.

  The detection unit 94 detects whether the supplied power is AC power or DC power as detection of the type of supplied power.

  The switching unit 95 switches whether to supply power to the electric device 1c via the AC / DC converter 93.

  When the detection unit 94 detects that the power on the power supply line L1 is DC power, the control unit 96 determines that the electrical device 1c connected to the adapter 7b is a DC electrical device. The switching unit 95 is controlled so as to switch the connection destination of the power supply line L <b> 1 to the first DC power supply path 90. In other words, the supply power that is direct current power is adjusted by the DC / DC converter 92 so as to have the voltage level of the required power of the main operation unit 10c of the electric device 1c, and the adjusted direct current power is supplied to the electric device 1c. Is done.

  On the other hand, when the detection unit 94 detects that the power on the power supply line L1 is AC power, the control unit 96 switches the connection destination of the power supply line L1 to the second DC power supply path 91. 95 is controlled. That is, the supplied power that is AC power is converted into DC power by the AC / DC converter 93, and the converted DC power is supplied to the electrical device 1c.

  In the present embodiment, the combination of the inverter 82, the switching unit 84 and the control unit 85 and the combination of the AC / DC converter 93, the switching unit 95 and the control unit 96 correspond to the power adapting means of the present invention.

  As described above, according to the present embodiment, the power supplied from the power supply line L1 is converted into the same type of power as the required power of the main operation units 10b and 10c of the electric devices 1b and 1c, so that the power on the power supply line L1. Whether the power is AC power or DC power, the power (AC power or DC power) required by the main operating units 10b and 10 can be supplied.

  In addition, according to the present embodiment, the AC power supply block 8 and the DC power supply block 9 are provided in the adapters 7a and 7b, thereby providing a power conversion function for converting the type of power to the electric equipment 1b, Since it does not need to prepare for 1c, the conventional electric equipment can be used.

  Furthermore, according to the present embodiment, the voltage of the required power of the main operation unit 10c is adjusted by adjusting the magnitude of the voltage of the DC power that is the power supplied from the power supply line L1 to the voltage of the required power. Even if the voltage is different from the voltage of the supplied power, the DC power suitable for the main operating unit 10c can be supplied to the electric device 1c.

(Embodiment 3)
As shown in FIG. 4, the power distribution system according to the third embodiment is that the AC power supply block 8 and the DC power supply block 9 are provided in the outlets 2 c and 2 d, and thus the power distribution system according to the second embodiment. (See FIG. 3). In addition, about the component similar to Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the present embodiment, the outlet 2c is an AC outlet to which an AC electrical device 1b is connected. The outlet 2d is a DC outlet to which the DC electrical device 1c is connected.

  As described above, according to this embodiment, the AC power supply block 8 and the DC power supply block 9 are built in the outlets 2c and 2d, so that the electric device does not have a power conversion function for converting the type of power. Therefore, a conventional electric device can be used. Further, it is not necessary to prepare the AC power supply block 8 and the DC power supply block 9 as separate products.

(Embodiment 4)
As shown in FIG. 5, the power distribution system according to the fourth embodiment is provided with an AC power supply block 8 and a DC power supply block 9 built in the electrical devices 1 d and 1 e, and thus the power distribution system according to the second embodiment. This is different from the system (see FIG. 3). In addition, about the component similar to Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The main operation unit 10d of the electric device 1d operates by being supplied with AC power. On the other hand, the main operation unit 10e of the electric device 1e operates by being supplied with DC power.

  As described above, according to the present embodiment, the AC power supply block 8 and the DC power supply block 9 are incorporated in the electric devices 1d and 1e and are provided integrally with the electric devices 1d and 1e, so that the AC power supply block 8 and the DC power supply block 9 are integrated. There is no need to prepare the power supply block 9 as a separate product.

(Embodiment 5)
In the first embodiment, the AC power distribution board 3 is provided with an AC power detection unit 32 in order to detect the magnitude of AC power from the commercial power source AC and a power failure of the commercial power source AC. In this case, since communication is performed between the AC power detection unit 32 and the switching device 6, the AC power detection unit 32 and the switching device 6 need to have a communication function. Further, since the management device 5 detects the amount of DC power generated by the DC power supply 4 and performs communication between the management device 5 and the switching device 6, the management device 5 also needs to have a communication function.

  Therefore, in the power distribution system according to the fifth embodiment, instead of the AC power detection unit 32, although not illustrated, an AC power detection unit having a function equivalent to that of the AC power detection unit 32 is provided in the switching device 6. Moreover, in this embodiment, it replaces with the function which detects the electric power generation amount of DC power in the DC power supply 4, and the switching apparatus 6 has a function which detects the illumination intensity of external light (sunlight).

  The switching device 6 of the present embodiment detects AC power (AC current, AC voltage) on the AC power feeding main line Lac by the AC power detection unit, and determines that AC power is no longer supplied from the commercial power supply AC ( When the commercial power supply AC fails, the power on the power supply line L is switched to the DC power from the DC power supply 4. Thereafter, when it is determined that the AC power is supplied again from the commercial power source AC (when the commercial power source AC recovers from the power failure), the switching device 6 switches the power on the power supply line L to the AC power from the commercial power source AC.

  In addition, when the illuminance of outside light is equal to or higher than a preset reference value, the switching device 6 determines that the amount of DC power generated by the solar battery 40 is large, and the power on the power supply line L is supplied from the DC power source 4. Switch to DC power.

  As described above, according to the present embodiment, it is not necessary to provide a communication function for performing communication between the AC distribution board 3 and the switching device 6 and between the management device 5 and the switching device 6. can do.

  Note that, as in the fifth embodiment, the configuration in which the switching device 6 has the function of detecting AC power on the AC power supply main line Lac and the function of detecting the illuminance of external light is the power distribution system according to the second to fourth embodiments. It can also be applied to.

1 is a configuration diagram of a power distribution system according to Embodiment 1. FIG. It is a block diagram which shows the structure of the switching apparatus which concerns on the same as the above. It is a block diagram of the principal part of the power distribution system which concerns on Embodiment 2. FIG. It is a block diagram of the principal part of the power distribution system which concerns on Embodiment 3. It is a block diagram of the principal part of the power distribution system which concerns on Embodiment 4.

Explanation of symbols

1a to 1e Electrical equipment 2a to 2d Outlet 3 AC distribution board (power connection means)
32 AC power detection unit (AC power detection means, power failure detection means)
4 DC power supply 5 Management device (DC power detection means)
6 Switching device 7a, 7b Adapter 8 AC power supply block 82 Inverter (conversion unit)
83 Detection part (detection means)
84 switching unit 85 control unit (switching control unit)
9 DC power supply block 92 DC / DC converter (voltage regulator)
93 AC / DC converter (conversion unit)
94 Detection part (detection means)
95 switching unit 96 control unit (switching control unit)
L1, L2 Power supply line Lac AC power supply main line Ldc DC power supply main line AC Commercial power supply

Claims (11)

A power supply line to which a power receiving terminal for both AC and DC is connected;
Power connection means connected to a commercial power source;
A DC power source including a power generating device that generates DC power;
A power distribution system comprising: a switching device configured to switch power on the power supply line between AC power from the commercial power source and DC power from the DC power source. The power receiving side terminal
Connection means to which electrical equipment is connected;
Detecting means for detecting the type of the supplied power whether the supplied power from the power supply line is AC power or DC power;
When the type of the supplied power detected by the detecting means is different from the type of required power required by the electric device, the type of the supplied power is converted into the required power type and supplied to the electric device The distribution system according to claim 1, further comprising: an adaptation unit.   The power distribution system according to claim 2, wherein the power receiving side terminal is an outlet connected to the power supply line. Comprising an outlet connected to the power supply line;
The power distribution system according to claim 2, wherein the power receiving side terminal is an adapter connected to the outlet. The power receiving terminal is provided integrally with the electrical device,
The electrical equipment is
Detecting means for detecting the type of the supplied power whether the supplied power from the power supply line is AC power or DC power;
When the type of the supplied power detected by the detecting means is different from the type of required power required by the electric device, the type of the supplied power is converted into the required power type and supplied to the electric device The power distribution system according to claim 1, further comprising: an adaptation unit. The power adapting means is
A conversion unit for converting the type of the supplied power;
A switching unit that switches whether to supply the supplied power to the electrical device via the conversion unit;
When the type of the supplied power detected by the detection unit is the same as the type of the required power, the switching unit is controlled so as to supply the supplied power to the electric device without going through the conversion unit. On the other hand, when the type of the supplied power detected by the detecting means is different from the type of the required power, a switching control unit that supplies the supplied power to the electric device via the conversion unit is provided. The power distribution system according to any one of claims 2 to 5. The type of the required power of the electrical device is DC power,
The power adapting means adjusts the magnitude of the voltage of the supplied power to the magnitude of the required power when the supplied power detected by the detecting means is DC power, and supplies the adjusted power to the electric equipment. Having a voltage regulator,
The voltage switching control unit controls the supply power to be supplied to the electric device via the voltage conversion unit when the supply power detected by the detection unit is DC power. The power distribution system according to claim 6.   The power distribution system according to claim 1, wherein the power receiving terminal is an electric device for both AC and DC. DC power detection means for detecting the amount of DC power generated by the DC power supply,
The switching device switches power on the power supply line to DC power from the DC power supply when a detection value of the DC power detection means is equal to or greater than a preset DC power reference value. Item 9. The power distribution system according to any one of Items 1 to 8. Comprising a power failure detection means for detecting a power failure of the commercial power supply,
9. The switching device according to claim 1, wherein when the power failure is detected by the power failure detection means, the power on the power supply line is switched to the DC power from the DC power source. The power distribution system according to claim 1. AC power detection means for detecting the magnitude of AC power from the commercial power supply,
The switching device switches power on the power supply line to DC power from the DC power supply when the detection value of the AC power detection means is equal to or greater than a preset threshold value. The power distribution system according to any one of 8.

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