JP2009148009A - Power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To operate required apparatuses surely by limiting the apparatuses being supplied with power from a distributed power supply when power is supplied to the apparatuses only with the distributed power supply provided independently from a main power supply, and to facilitate specification of the apparatuses. <P>SOLUTION: A DC power supply section 101 comprises a distributed power supply 20 which can back up power supply when a main power supply 10 stops. DC apparatuses 102 are supplied with power from the DC power supply section 101 through a DC power supply line Wdc and communicable with an apparatus select section 14. When stop of the main power supply 10 is detected at a power failure detection section 11, the apparatus select section 14 selects DC apparatuses 102 to which DC power is supplied from the DC power supply section 101 according to a priority stored in a priority storage section 13, and designates nonselected DC apparatuses 102 to stop operation by communication. The apparatus select section 14 specifies the nonselected DC apparatuses 102 in the order of priority as the remaining capacity of a secondary battery provided in the distributed power supply 20 decreases. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a distributed power source that backs up the power supply in the event of a power failure of the main power supply, in addition to the main power source such as a commercial power source, when supplying power to a device arranged in a building such as a house, store, or office. The present invention relates to a provided power supply system.

Generally, this type of power supply system is configured to back up a power source using the power of a distributed power source such as a battery or a solar cell in the event of a power failure of a main power source such as a commercial power source (for example, Patent Documents). 1). Patent Document 1 is a configuration in which a load is connected to a power line that supplies power from a power supply control device that performs power backup, via an output-side switch, and an on / off signal of an output-side switch provided for each load is signaled. The technology to control by is described. In addition, it is described that on / off of the output-side switch is controlled so that power is supplied only to an important load when the AC power supply fails.
JP-A-9-135541

  A distributed power supply often has a small power capacity that can be supplied compared to a main power supply, and it is difficult to supply power stably and stably. For example, in a distributed power source that uses a battery as a power source, the remaining amount of the battery decreases as power is supplied to the device, so that the power supply to the device stops when time elapses. In addition, with a distributed power source that uses solar cells as a power source, it is possible to drive the device in the rainy or at night even though the power capacity required for driving the device can be secured during sunny daytime when sufficient amount of sunlight can be obtained. Necessary amount of power generation cannot be obtained.

  By the way, when using commercial power as main power, the average frequency of power outages is less than once a year in Japan, and the duration of one power outage is less than 30 minutes. It has been. Therefore, it can be said that it is sufficient if a backup distributed power source is provided so as to cope with such a power failure. However, since the distributed power supply has a limited power capacity as described above, there is a problem that backup becomes insufficient when all the devices attached to the building operate simultaneously.

  In the technique described in Patent Document 1, on / off of the output-side switch is controlled so that power from a distributed power supply (uninterruptible power supply) is supplied only to an important load. Therefore, the limited power of the distributed power supply is used. Thus, it becomes possible to supply power to the important load for a relatively long time. However, unless the load connected for each output-side switch is registered, the on / off state of each output-side switch during a power failure cannot be determined. In other words, it is essential to associate the load with the output side switch, and it is difficult to determine which output side switch is connected to the important load.

  The present invention has been made in view of the above-mentioned reasons, and the purpose of the present invention is to limit the number of devices to be powered from the distributed power source when supplying power to the device with only the distributed power source provided separately from the main power source. It is an object of the present invention to provide an electric power supply system that makes it possible to specify a device easily by allowing the device to operate reliably and directly specifying a device that needs to be supplied with power from a distributed power source.

  The invention of claim 1 includes a power supply unit including a distributed power source that can be backed up when the main power supply is stopped, a device attached to the building and driven by power supplied from the power supply unit, and a stop of the main power supply. The power failure detection unit to detect, the priority storage unit that stores the priority of the device to be used, and the device can communicate with each other, and when the power failure detection unit detects a stop of the main power supply, it is set in the priority storage unit And a device selection unit that selects a device to be fed from the power supply unit according to the priority for each device, and instructs a non-selected device to stop operation by communication.

  Here, the stop of the main power source means that the main power source cannot be used, and includes not only the case where the power source is interrupted, such as a power failure, but also the case where the line voltage is abnormally lowered.

  According to a second aspect of the present invention, in the first aspect of the invention, the distributed power source uses a battery as a power source, and the device selection unit includes a remaining amount monitoring unit that monitors a remaining battery level and is monitored by the remaining amount monitoring unit. A priority is associated with each stage of the remaining battery level, and as the remaining battery level decreases, non-selection is made in order from the device with the lowest priority.

  In the invention of claim 3, in the invention of claim 1 or claim 2, the priority storage unit sets the priority for each device based on the type of each device acquired through communication with the device. Features.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the device is configured to stop the main function and continuously operate the communication function when the stop is instructed by the device selection unit. And the said apparatus selection part has the function to change the priority of the apparatus supplied with power from the said electric power supply part, after the said power failure detection part detects the stop of the said main power supply.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, the priority storage unit stores the elapsed time after the stop of the main power supply is detected by the power failure detection unit in relation to the priority of each device. The device selection unit includes a timing unit that counts an elapsed time after the stop is detected in a period from when the main power supply is stopped until power is restored, and gives priority to the measured elapsed time. The power supply device is changed by using the priority associated with the elapsed time in comparison with the elapsed time stored in the degree storage unit.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the priority storage unit includes an area for storing a time zone in association with the priority for each device, and the device selection The unit includes a clock unit that measures the current time, and is associated with the time zone by comparing the current time with the time zone stored in the priority storage unit when selecting a device to be fed from the power supply unit. The priority is used.

  According to a seventh aspect of the invention, in any one of the first to sixth aspects of the invention, the power supply unit supplies direct current power, and the device is a direct current device driven by direct current power. .

  According to the configuration of the first aspect of the present invention, the device selection unit that selects a device to be fed from the power supply unit according to the priority stored in the priority storage unit is provided, and the device selection unit is configured for a device that is not selected. Since communication is instructed to stop the operation, only the selected device is supplied with power from the distributed power supply. As a result, it is possible to limit devices that are supplied with power from the distributed power source when the main power source is stopped, and to reliably operate necessary devices even with the limited power capacity of the distributed power source. In addition, the device that supplies power from the power supply unit is selected, the non-selected device is instructed to stop operation by communication, and the device that needs to be supplied from the distributed power supply is directly specified by communication. Is easy.

  According to the configuration of the invention of claim 2, the distributed power source uses the battery as the power source, and the priority of the device is related to each stage of the remaining battery level, and the number of non-selected devices increases as the remaining battery level decreases. Since the high-priority device is supplied with power until the remaining battery level is exhausted, it is possible to continue supplying power to the essential device as much as possible for ensuring safety.

  According to the configuration of the invention of claim 3, since the priority storage unit acquires the device type by communication and sets the priority, for example, each device is classified into a security device, a communication device, and a lighting device. If priorities are set for various types of devices in this order, the security device can be operated to the end even when the power capacity of the distributed power supply is the smallest, and safety can be ensured.

  According to the configuration of the invention of claim 4, since the communication function of the device is used after the main power supply is stopped, the priority of the device that supplies power from the distributed power supply can be changed. When a switch that turns on the lighting device is operated for a lighting device that has a priority set so as not to supply power from the distributed power supply, it is possible to supply power only to the lighting device. Become. That is, when the main power supply stops at night, even if the lighting device that illuminates the room is a device that is not selected by the device selection unit, the lighting device is forcibly turned on by operating the switch at hand. Can be used to ensure safety.

  According to the configuration of the invention of claim 5, the priority of the device that supplies power from the distributed power supply can be changed with the elapsed time after the main power supply is stopped. The power supply to the lighting device is made possible, and the operation of gradually decreasing the number of lighting lamps with the passage of time becomes possible. With such an operation, in lighting equipment such as stair lights, the lighting of the lighting equipment that is lit up will not be suddenly turned off when the main power supply stops and the safety of the feet cannot be secured. As the number decreases with the passage of time, it is possible to notify that the main power supply has stopped, and it is possible to leave a safe place before all the lighting devices are turned off.

  According to the configuration of the invention of claim 6, the priority can be changed if the time zone is different even in the same device. For example, the lighting priority required for the night time zone is lowered in the daytime time zone. Therefore, it is possible to avoid power supply to unnecessary equipment and save power of the distributed power source.

  According to the configuration of the seventh aspect of the invention, since the device is a direct current, there is no need to convert it to an alternating current power when a secondary battery or a solar battery is used as the distributed power source. Well, the configuration of the distributed power supply becomes simple.

  Although the embodiment described below is described assuming a detached house as a building to which the present invention is applied, it does not preclude applying the technical idea of the present invention to an apartment house. FIG. 3 shows the overall configuration of a power supply system to which this embodiment is applied. As shown in FIG. 3, the house H is provided with a DC power supply unit (power supply unit) 101 that outputs DC power, and a DC device (device) 102 as a load driven by DC power. DC power is supplied to the DC device 102 through the DC supply line Wdc connected to the output end of the power supply unit 101. A current flowing through the DC supply line Wdc is monitored between the DC power supply unit 101 and the DC device 102. When an abnormality is detected, power is supplied from the DC power supply unit 101 to the DC device 102 on the DC supply line Wdc. A DC breaker 114 is provided for limiting or blocking the current.

  The DC supply line Wdc is used as both a DC power supply path and a communication path, and is connected to the DC supply line Wdc by superimposing a communication signal for transmitting data on a DC voltage using a high-frequency carrier wave. Enables communication between devices. 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.

  The DC supply line Wdc is connected to the home server 116 via the DC power supply unit 101. The in-home server 116 is a main device for constructing a home communication network (hereinafter referred to as “home network”), and communicates with a subsystem constructed by the DC device 102 in the home network.

  In the example shown in the drawing, as an subsystem, an illumination system comprising an information equipment system K101 comprising an information-system DC device 102 such as a personal computer, a wireless access point, a router, and an IP telephone, and an illumination system DC equipment 102 such as a lighting fixture. K102, K105, entrance system K103 composed of DC device 102 for dealing with visitors, monitoring intruders, etc., and residential alarm system K104 composed of alarm DC device 102 such as a fire detector. Each subsystem constitutes a self-supporting distributed system, and can operate even with the subsystem alone.

  The above-described DC breaker 114 is provided in association with a subsystem. In the illustrated example, four DCs are associated with the information equipment system K101, the lighting system K102 and the entrance system K103, the house alarm system K104, and the lighting system K105. A breaker 114 is provided. When a plurality of subsystems are associated with one DC breaker 114, a connection box 121 for dividing the system of the DC supply line Wdc is provided for each subsystem. In the illustrated example, a connection box 121 is provided between the illumination system K102 and the entrance system K103.

  As the information equipment system K101, there is provided an information equipment system K101 composed of a DC equipment 102 connected to a DC outlet 131 arranged in advance in the house H (constructed when the house H is constructed) in the form of a wall outlet or a floor outlet.

  The lighting systems K102 and K105 include a lighting system K102 composed of a lighting device (DC device 102) arranged in advance in the house H and a lighting device (DC device 102) connected to a hook ceiling 132 arranged in advance on the ceiling. An illumination system K105 is provided. At the time of interior construction of the house H, the contractor attaches the lighting fixture to the hook ceiling 132, or the householder himself attaches the lighting fixture.

  In addition to using an infrared remote control device, a control instruction for the lighting apparatus that is the DC device 102 constituting the lighting system K102 can be given using a communication signal from the switch 141 connected to the DC supply line Wdc. That is, the switch 141 has a communication function together with the DC device 102. In addition, a control instruction may be given by a communication signal from another DC device 102 in the home network or the home server 116 regardless of the operation of the switch 141. The instructions to the lighting fixture include lighting, extinguishing, dimming, and blinking lighting.

  Since any DC device 102 can be connected to the DC outlet 131 and the hooking ceiling 132 described above and DC power is output to the connected DC device 102, the DC outlet 131 and the hooking ceiling 132 are distinguished below. When it is not necessary, it is called “DC outlet”.

  These DC outlets have a plug-in connection port into which a contact (not shown) provided directly on the DC device 102 or a contact (not shown) provided via a connection line is inserted into the body. The contact receiver that directly contacts the contact inserted into the connection port is held by the container. That is, the direct current outlet supplies power in a contact manner. When the DC device 102 connected to the DC outlet has a communication function, a communication signal can be transmitted through the DC supply line Wdc. A communication function is provided not only in the DC device 102 but also in the DC outlet.

  The home server 116 not only is connected to the home network, but also has a connection port connected to the wide area network NT that constructs the Internet. When the in-home server 116 is connected to the wide area network NT, it is possible to receive services from the center server 200 that is a computer server connected to the wide area network NT.

  The service provided by the center server 200 includes a service that enables monitoring and control of equipment (including mainly the DC equipment 102 but also other equipment having a communication function) connected to the home network through the wide area network NT. is there. This service makes it possible to monitor and control devices connected to the home network using a communication terminal (not shown) having a browser function such as a personal computer, Internet TV, or mobile phone.

  The in-home server 116 has both functions of communication with the center server 200 connected to the wide area network NT and communication with equipment connected to the home network, and identification information on equipment in the home network ( Here, it is assumed that an IP address is used).

  The home server 116 enables monitoring and control of home devices through the center server 200 from a communication terminal connected to the wide area network NT by using a communication function with the center server 200. The center server 200 mediates between home devices and communication terminals on the wide area network NT.

  When monitoring and controlling home devices from a communication terminal, monitoring and control requests are stored in the center server 200, and the home device periodically performs one-way polling communication to monitor from the communication terminal. And receive control requests. With this operation, it is possible to monitor and control devices in the house from the communication terminal.

  Further, when an event that should be notified to the communication terminal, such as a fire detection, occurs in the home device, the home device notifies the center server 200, and the center server 200 notifies the communication terminal by e-mail.

  An important function among the communication functions with the home network in the home server 116 is the detection and management of devices constituting the home network. The home server 116 automatically detects devices connected to the home network by applying UPnP (Universal Plug and Play). The home server 116 includes a display device 117 having a browser function, and displays a list of detected devices on the display device 117. The display device 117 has a configuration with a touch panel type or an operation unit, and can perform an operation of selecting desired contents from options displayed on the screen of the display device 117. Therefore, the user (contractor or householder) of the home server 116 can monitor or control the device on the screen of the display device 117. The display device 117 may be provided separately from the home server 116.

  The in-home server 116 manages information related to device connection, and grasps the type, function, and address of the device connected to the home network. Accordingly, the devices in the home network can be operated in conjunction with each other. Information on the connection of the device is automatically detected as described above. In order to operate the device in an interlocking manner, the device itself is automatically associated with the attribute held by the device itself, and the home server 116 is configured as a personal computer. It is also possible to connect various information terminals and use the browser function of the information terminals to associate devices.

  Each device holds the relationship of the interlocking operation of the devices. Therefore, the device can operate in an interlocked manner without passing through the home server 116. By associating the linked operations for each device, for example, by operating a switch that is a device, it is possible to turn on or off the lighting fixture that is the device. In many cases, the association of the interlocking operations is performed within the subsystem, but the association beyond the subsystem is also possible.

  By the way, the DC power supply unit 101 basically generates DC power by power conversion of an AC power supply AC supplied from outside the house like a commercial power supply. In the configuration shown in the figure, the AC power source AC is input to an AC / DC converter 112 including a switching power source through a main circuit breaker 111 attached to the distribution board 110 as an internal unit. The DC power output from the AC / DC converter 112 is connected to each DC breaker 114 through the cooperative control unit 113.

  The DC power supply unit 101 is provided with a secondary battery 162 in preparation for a period in which power is not supplied from the AC power supply AC (for example, a power failure period of the commercial power supply AC). It is also possible to use a solar cell 161 or a fuel cell 163 that generates DC power. The solar battery 161, the secondary battery 162, and the fuel battery 163 are distributed power supplies with respect to the main power supply including the AC / DC converter 112 that generates DC power from the AC power supply AC. In the illustrated example, the solar cell 161, the secondary battery 162, and the fuel cell 163 include a circuit unit that controls the output voltage, and the secondary battery 162 includes a circuit unit that controls charging as well as discharging.

  Of the distributed power sources, the solar cell 161 and the fuel cell 163 are not necessarily provided, but the secondary battery 162 is preferably provided. The secondary battery 162 is charged in a timely manner by a main power source or other distributed power source, and the secondary battery 162 is discharged not only in a period in which power is not supplied from the AC power source AC but also in a timely manner as necessary. The cooperation control unit 113 performs charge / discharge of the secondary battery 162 and cooperation between the main power source and the distributed power source. That is, the cooperative control unit 113 functions as a DC power control unit that controls the distribution of power from the main power supply and the distributed power supply constituting the DC power supply unit 101 to the DC devices 102. Note that a configuration may be adopted in which the outputs of the solar cell 161, the secondary battery 162, and the fuel cell 163 are converted into AC power and used as input power of the AC / DC converter 112.

  Since the driving voltage of the DC device 102 is selected from a plurality of types of voltages depending on the device, the cooperative control unit 113 is provided with a DC / DC converter to convert the DC voltage obtained from the main power source and the distributed power source into the necessary voltage. Is desirable. Normally, one type of voltage is supplied to one subsystem (or DC device 102 connected to one DC breaker 114), but three or more wires are used for one subsystem. A plurality of types of voltages may be supplied. Alternatively, it is possible to adopt a configuration in which the DC supply line Wdc is of a two-wire type and the voltage applied between the lines is changed with time. The DC / DC converter may be provided in a plurality of dispersed manners like the DC breaker.

  In the above configuration example, only one AC / DC converter 112 is illustrated, but a plurality of AC / DC converters 112 can be arranged in parallel, and when a plurality of AC / DC converters 112 are provided. It is desirable to increase or decrease the number of AC / DC converters 112 that are operated according to the magnitude of the load.

  The AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, the solar cell 161, the secondary battery 162, and the fuel cell 163 described above are provided with a communication function, and include a main power source, a distributed power source, and a DC device 102. It is possible to perform cooperative operations that deal with the load status. The communication signal used for this communication is transmitted in the form of being superimposed on the DC voltage in the same manner as the communication signal used for the DC device 2.

  In the above example, the AC / DC converter 112 is arranged in the distribution board 110 in order to convert the AC power output from the main breaker 111 into DC power by the AC / DC converter 112. On the output side, a branch breaker (not shown) provided in the distribution board 110 branches the AC supply line into a plurality of systems, and an AC / DC converter is provided on the AC supply line of each system to convert it into DC power for each system. You may employ | adopt the structure to do.

  In this case, since the DC power supply unit 101 can be provided for each floor or room of the house H, the DC power supply unit 101 can be managed for each system, and the DC device 102 that uses DC power and Since the distance of the DC supply line Wdc between the two is reduced, the power loss due to the voltage drop in the DC supply line Wdc can be reduced. Also, the main breaker 111 and the branch breaker are housed in the distribution board 110, and the AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, and the home server 116 are housed in a separate board from the distribution board 110. Also good.

  Below, the principal part of this embodiment is demonstrated with reference to FIG. In FIG. 1, a solid line indicates a power supply path, and a broken line indicates a communication path. As described above, the communication signal is superimposed on the DC voltage, but a communication path for transmitting the communication signal may be provided separately from the DC supply line Wdc. The direct-current power supply unit 101 includes a main power supply 10 including an AC / DC converter 112 and an alternating-current power supply AC, and a distributed power supply 20 including at least the secondary battery 162 among the solar battery 161, the secondary battery 162, and the fuel cell 163. With.

  In the illustrated example, the DC power supply unit 101 includes a power failure detection unit 11 that detects a stop of the main power source 10 (power failure or abnormal decrease in line voltage), a main power source 10, a distributed power source 20, and a DC supply line Wdc. And a power supply control unit 12 that performs the connection. The power supply control unit 12 also has a function of controlling the charging current to the secondary battery 162 provided in the distributed power supply 20. The power failure detection unit 11 and the power supply control unit 12 may be provided separately from the DC power supply unit 101. When the power failure detection unit 11 detects that the main power supply 10 is stopped, the power supply control unit 12 disconnects the main power supply 10 from the DC supply line Wdc and connects only the distributed power supply 20 to the DC supply line Wdc. With this configuration, backup by the distributed power source 20 is possible when the main power source 10 is stopped.

  The power failure detection unit 11 and the power supply control unit 12 are provided in the cooperative control unit 113 together with the priority storage unit 13 and the device selection unit 14. The priority storage unit 13 includes a rewritable nonvolatile semiconductor memory that stores the priority determined by the type or the like of the DC device 102 in association with the identification information (IP address or the like) of each DC device 102.

  As shown in FIG. 2, the DC device 102 includes a communication function unit 102 b to enable communication, in addition to the main function unit 102 a that exhibits the functions expected as the DC device 102, and communicates with the main function unit 102 a. The functional unit 102b is connected to the DC supply line Wdc through a filter circuit 102c that separates DC power and communication signals. A switch element 102d controlled by the communication function unit 102b is inserted between the filter circuit 102c and the main function unit 102a. The communication function unit 102b always turns on the switch element 102d, but turns off the switch element 102d according to an instruction from the device selection unit 14. The power of the communication function unit 102b is supplied to the switch element 102d from the filter circuit 102c side, and DC power is supplied to the communication function unit 102b even when the switch element 102d is turned off. Further, the communication function unit 102b consumes less power than the main function unit 102a, and the DC device 102 becomes high impedance when the switch element 102d is off.

  The communication function unit 102 b provided in the DC device 102 holds identification information and information regarding the type of the DC device 2. The type of the DC device 102 is, for example, a security device such as the DC device 102 constituting the entrance system K103 or the residence guard system K104, a lighting device constituting the lighting systems K102 and K105, and an information device constituting the information equipment system K101. and so on. In order to give priority according to the type of the DC device 102, for example, the priority is set in the order of security device, information device, and lighting device. In this example, the security device has the highest priority. In addition, priority may be set for the DC device 102 of the same type according to the installation location.

  The identification information and type of the DC device 102 are managed by the home server 116, and thus the information of the home server 116 may be used. However, the priority storage unit 13 collects information by communicating with the DC device 102. Also good. When the priority is set only by the type acquired from the DC device 102, the priority storage unit 13 automatically sets the priority for each device from the type, and as shown in Table 1, (DC device 102 , Identification information, type of DC device 102, and priority of DC device 102), each DC device 102 is associated with a priority. In Table 1, numerical values 1, 2, and 3 representing priority indicate that the smaller the numerical value, the higher the priority.

  The priority can be set not only by the type of the DC device 102 but also by using information such as the installation location for each DC device 102. When setting the priority using information such as the installation location, the user registers in the priority storage unit 13 using an information terminal or display device 117 that can communicate with the home server 116. The use of the priority set in this way will be described later.

  The device selection unit 14 can communicate with the DC device 102, and when the power failure detection unit 11 detects the stop of the main power supply 10, the DC power supply unit 101 () according to the priority set in the priority storage unit 13. That is, the DC device 102 to be fed from the distributed power source 20) is selected. Here, the device selection unit 14 communicates with the unselected DC device 102 and instructs the DC device 102 to stop the operation. The DC device 102 includes the switch element 102d controlled by the communication function unit 102b as described above, and when the stop is instructed from the device selection unit 14, the switch element 102d is turned off. That is, the DC device 102 stops the main function when the device selection unit 14 instructs to stop, but continues the communication function.

  As is apparent from the above-described operation, in the present embodiment, the power supply may be stopped while the main power supply 10 is stopped, instead of forcibly supplying power to the device at the time of a power failure like a guide light or an emergency light. The operation of the DC device 102 is stopped according to the priority. The priority is used to determine whether or not the DC device 102 can be used during power supply from the distributed power supply 20, and the low priority means that it can be used while the main power supply 10 is stopped. It means lowering. This does not mean that power is automatically supplied to the DC device 102 with high priority when the main power supply 10 is stopped. Therefore, for example, when the period during which the main power supply 10 is stopped is short, all the DC devices 102 can be used and the convenience is ensured. In order to effectively use the limited distributed power supply 20, the DC device 102 with a high priority is made available, and the DC device 102 with a low priority can be stopped even during operation. Such an operation will be described later.

  With the above-described operation, the DC device 102 to be fed from the DC power supply unit 101 is selected according to the priority stored in the priority storage unit, and the DC device 102 that has not been selected is stopped, so only the selected DC device 102 is selected. The power is supplied from the distributed power source 20. That is, it is possible to limit the DC devices 102 that are fed from the distributed power supply 20 when the main power supply 10 is stopped. Below, the technique using priority is demonstrated concretely.

  First, after the main power supply 10 is stopped, the number of DC devices 102 that supply power from the distributed power supply 20 is sequentially reduced in accordance with the remaining battery capacity of the secondary battery 162 (the amount of charge that can be used by discharging from the secondary battery 162). A technique that uses priority when performing control will be described. In this operation, the number of operable DC devices 102 decreases as the remaining battery level of the secondary battery 162 decreases. However, it is possible to supply power to the necessary DC devices 102 as much as possible. Become.

  In order to perform the above-described operation, the device selection unit 14 includes a remaining amount monitoring unit 14 a that monitors the remaining battery level of the secondary battery 162 provided in the distributed power source 20. The remaining amount monitoring means 14a is configured to detect the remaining battery level of the secondary battery 20 based on a voltage change when discharged for a specified time through a specified value of electrical resistance, or to monitor the charge / discharge current of the secondary battery 20. And adopting a configuration for estimating the remaining battery level. The battery remaining amount monitored by the remaining amount monitoring unit 14a is assigned with a stage in the same manner as the priority, and the priority is associated with each stage. That is, the battery remaining amount is set in a section divided by a plurality of reference values, and the priority of the DC device 102 is related to the section to which the remaining battery amount detected by the remaining amount monitoring means 14a belongs. Attached.

  In the device selection unit 14, during the period in which the main power supply 10 is stopped and power is supplied from the distributed power supply 20, the remaining battery level detected by the remaining power monitoring unit 14a is determined for each stage (the remaining battery level is a reference value). ), An instruction to stop in order from the DC device 102 with the lower priority is given as the remaining battery level decreases.

  Here, according to Table 1 described above, a case where the priority between the device 1 and the device 3 is 3, the priority of the device n is 2, and the priority of the device 2 is 1 will be described as an example. Now, it is assumed that the remaining battery level of the secondary battery 162 immediately after the main power supply 10 is stopped is related to the priority 3. In this case, since it is possible to supply DC power to all of the device 1, the device 2, the device 3, and the device n, the DC device 102 is not instructed to stop.

  When the DC device 102 of any one of the device 1, the device 2, the device 3, and the device n is used after the stop state of the main power supply 10 continues, the remaining battery level of the secondary battery 162 is lowered, and eventually the priority 2 Degraded to a stage related to At this time, the device 1 and the device 3 are instructed to stop the operation from the device selection unit 14. If either the device 1 or the device 3 has been used up to this point, the power consumption for the secondary battery 162 is reduced, and the reduction rate of the remaining battery capacity of the secondary battery 162 is reduced.

  Similarly, when the remaining battery level is reduced to the level related to priority level 1, a stop is instructed except for the device 2, so that the operation of the device 2 can be continued with the remaining battery level, The period during which the device 2 can operate can be extended as much as possible. Therefore, if the DC device 102 that is indispensable for ensuring safety is assigned as the device 2, power supply to the DC device 102 is continued as much as possible to contribute to ensuring safety.

  Note that when the main power supply 1 is restored, the device selection unit 14 releases the operation stop instruction to all the DC devices 102. That is, in any DC device 102, the switch element 102d is turned on, and normal operation is possible.

Next, an operation of changing the priority of the DC device 102 according to the time zone when the main power supply 10 is stopped will be described. This operation is applied to, for example, a lighting device that needs to be lit during the nighttime period but does not need to be lit during the daytime period. By adopting this operation, it is possible to save the power of the distributed power supply 20 by preventing power from being supplied to the DC device 102 that does not require operation depending on the time of day.
The operation of changing the priority according to the time zone can be combined with the operation of limiting the DC device 102 to be fed according to the remaining battery level.

  In order to perform this operation, the device selection unit 14 requires clock means 14b for measuring the current time. Further, as shown in Table 2, the information stored in the priority storage unit 13 is a set of four (identification information of the DC device 102, type of the DC device 102, priority of the DC device 102, time zone). . That is, the priority storage unit 13 includes an area for storing a time zone in relation to the priority. In order to set the above four sets in the priority storage unit 13, the information acquired by the home server 116, the information acquired uniquely by the priority storage unit 13, and the user using the display device 117 or the information terminal Combine the set information.

  In the device selection unit 14, the current time measured by the clock unit 14 b is collated with the time zone stored in the priority storage unit 13 during the period in which the main power supply 10 is stopped and the power is supplied from the distributed power supply 20. To do. When there is a DC device 102 in which a time zone is set and the current time is included in the time zone, the priority associated with the time zone is adopted. Therefore, the priority can be changed even when the same DC device 102 has different time zones. In this operation, the operation of the DC device 102 is prohibited when the DC device 102 shifts to a time zone in which the priority is low while the DC device 102 is in use.

  By the way, in the above-described operation, the case where only priority given in advance is used is exemplified, but the priority can be changed in the device selection unit 14 after the power failure detection unit 11 detects the stop of the main power supply 10. As a result, convenience can be improved. For example, even when the use of a lighting device that illuminates the room is prohibited during a period when the main power supply 10 is stopped at night, only the lighting device is forcibly turned on when the hand switch is operated. If this can be done, it can be used to ensure safety. Therefore, the DC device 102 necessary for ensuring safety, such as a lighting device, among the DC devices 102 is changed in priority for the operation of a specific switch even if the priority is set low. Therefore, it is desirable to adopt a configuration in which it can be used. This configuration can be combined with the other configurations described above.

  As a configuration in which the priority can be changed while the main power supply 10 is stopped, a configuration in which the reference to be changed is registered in the priority storage unit 13 in advance can be employed. That is, the priority storage unit 13 associates the elapsed time since the main power supply 10 is stopped with the priority for each DC device 102, and the device selection unit 14 restores the main power supply 10 after the main power supply 10 is stopped. A time measuring unit 14c is provided for measuring the elapsed time since the stop in the period until power is supplied, and the elapsed time measured by the time measuring unit 14c is compared with the elapsed time stored in the priority storage unit 13, and the elapsed time The priority related to time is applied to each DC device 102. As shown in Table 3, the priority storage unit 13 is provided with an area for registering elapsed time. The priority storage unit 13 stores four sets (identification information of the DC device 102, type of the DC device 102, priority of the DC device 102, and elapsed time).

  For example, if the priority is set according to the elapsed time as in the device 1, the priority is 1 for 10 seconds after the main power supply 10 is stopped, so that the operation can be used without being prohibited. Since the priority is 2 for 10 to 20 seconds after 10 stops, the battery may not be used depending on the remaining battery level, and since the priority is 3 after 20 seconds after the main power supply 10 is stopped, use is prohibited. It becomes possible to operate. In addition, when multiple lighting devices are arranged in the same space, such as corridor lights and stair lights, if the priority according to the elapsed time is different for each lighting device, it gradually increases with time. It is also possible to reduce the number of lighting lamps. Therefore, the main power supply 10 is stopped because the number of lights of the lighting devices that are lit decreases with the passage of time without suddenly turning off with the stop of the main power supply 10 and securing the safety of the feet. It is also possible to notify the user of this fact, and it becomes possible to leave the safe place before all the lighting devices are turned off.

  In the above-described embodiment, the DC power supply unit 101 is exemplified as the power supply unit, but an AC power supply unit can also be used. In this case, instead of the DC device 102, an AC device is used as the device.

It is a principal part block diagram which shows embodiment of this invention. It is operation | movement explanatory drawing same as the above. It is a block diagram which shows the whole structure same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main power supply 11 Power failure detection part 12 Power supply control part 13 Priority memory | storage part 14 Device selection part 14a Remaining amount monitoring means 14b Clock means 14c Time measuring means 20 Distributed power supply 101 DC power supply part (power supply part)
102 DC equipment (equipment)
162 Secondary battery (battery)
H House (Building)
Wdc DC supply line

Claims (7)

  A power supply unit including a distributed power source that can be backed up when the main power supply is stopped, a device that is attached to the building and is driven by power supplied from the power supply unit, a power failure detection unit that detects the stop of the main power supply, The priority storage unit that stores the priority of the device to be used and the device-specific priority set in the priority storage unit when communication with the device is possible and the power failure detection unit detects a stop of the main power supply And a device selection unit that selects a device to be fed from the power supply unit and instructs a non-selected device to stop operation by communication.   The distributed power source uses a battery as a power source, and the device selection unit includes a remaining amount monitoring unit that monitors a remaining battery level, and associates a priority with each stage of the remaining battery level monitored by the remaining amount monitoring unit, 2. The power supply system according to claim 1, wherein the power supply system is deselected in order from a device with a lower priority as the remaining amount decreases.   The power supply system according to claim 1, wherein the priority storage unit sets a priority for each device based on a type of each device acquired through communication with the device.   The device is configured to stop the main function when the stop is instructed by the device selection unit and continuously operate the communication function, and the device selection unit detects the stop of the main power supply by the power failure detection unit. The power supply system according to any one of claims 1 to 3, further comprising a function of changing a priority of a device to be fed later from the power supply unit.   The priority storage unit includes an area that stores an elapsed time after the stop of the main power source is detected by the power failure detection unit in relation to a priority for each device, and the device selection unit includes the main power source. A time measuring means for measuring the elapsed time after the stop is detected in the period from when the power is stopped until power is restored, and by comparing the elapsed time with the elapsed time stored in the priority storage unit The power supply system according to claim 4, wherein the power supply device is changed by using a priority related to time.   The priority storage unit includes an area for storing a time zone in association with the priority for each device, and the device selection unit includes a clock unit that measures the current time and supplies power from the power supply unit. 5. The priority associated with the time zone is used by comparing the current time with the time zone stored in the priority storage unit when the device is selected. The power supply system according to item.   The power supply system according to any one of claims 1 to 6, wherein the power supply unit supplies DC power, and the device is a DC device driven by DC power.

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