JP2013110944A - Power management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently utilize generated power using natural energy or the like.SOLUTION: A management control board includes steps of: detecting power consumption Pc, power Ps generated by a photovoltaic power generator and power Pw generated by a wind power generator, and confirming whether generated power which is power to be supplied exceeds the power consumption or not (step 110 to 116); supplying the generated power to a distribution board when the generated power exceeds the consumption power to inform so as to stop a system power supply, and then supplying the generated power to the distribution board and stopping the system power supply to inform that the system power supply is stopped (step 118 to 122); and obtaining discharge power from a storage battery and a vehicle and generated power Pf of a fuel cell when the power consumption exceeds the generated power, and supplying power of the respective power source to the distribution board when a suppliable power obtained by summing the discharge power and generated power exceeds the power consumption to inform that the system power source is stopped (step 124 to 152).

Description

  The present invention relates to a power management system.

  In recent years, a power generation apparatus using natural energy such as a solar power generation apparatus or a wind power generation apparatus has been provided even in a general house. In general, the generated power of the power generation device provided in the house is sold to be transmitted to the system power source, and the power including the generated power of the solar power generation device is supplied to the house from the system power source.

  By the way, the power consumption peaks during the daytime hours, and surplus power is generated during the midnight hours. From here, a proposal has been made to provide a storage battery, charge the storage battery with surplus power in the midnight hours, and consume solar power and storage battery power as household power during the daytime hours when power consumption peaks. (For example, refer to Patent Document 1).

  Moreover, in this proposal, when there is a shortage in the photovoltaic power and the power charged in the storage battery (discharged power), the power of the grid power supply is supplied, and there is a surplus in the power of the solar power and the storage battery. When this occurs, the power generated by the system power supply is averaged by transmitting power to the system power supply so as to sell power.

JP 2002-17043 A

  However, charging the power of the system power supply to the storage battery and supplying the power stored in the storage battery so that it is consumed in the house can be achieved even if the power consumption of the system power supply can be averaged. However, it is not possible to efficiently use the power generated by using natural energy at home.

  The present invention has been made in view of the above-described facts, and an object thereof is to propose a power management system that can suppress the power consumption of the system power supply and can efficiently use the power generated by using natural energy at home. And

  The invention according to claim 1 for solving the above problem includes a natural energy power generation means for generating power using natural energy, and a plurality of power sources that supply power to electrical equipment in a building, including a system power supply, Based on the priority set with the rank of the natural energy power generation means higher than the rank of the grid power supply, the priority is given when the current suppliable power from the plurality of power sources exceeds the power consumption consumed by the electrical equipment. Power management means for controlling power to be supplied from the power source having the higher priority and stopping the power source having the lower priority.

  According to the first aspect of the present invention, a plurality of power sources including a system power source and a natural energy power generation unit are provided as power sources for supplying power to the electrical equipment in the building, and the grid is provided between the plurality of power sources. Priorities are set so that the order of natural energy power generation means is higher than the power source.

  In addition, if the current suppliable power from multiple power sources exceeds the power consumption consumed by the electrical equipment in the building, power is supplied from the power source with higher priority to the electrical equipment, and the priority is lower. Control to stop the power source. At this time, for example, if it is not possible to cover the power consumption with the suppliable power of the power source with a high priority, the power including the power source with the next highest priority is supplied to the electric equipment, Stop power supply from low power sources.

  Thereby, the power generated by the natural energy power generation means is supplied to the electric device in preference to the system power supply, and the power consumption of the system power supply can be suppressed.

  According to a second aspect of the present invention, in the first aspect, the power management unit includes a notification unit that notifies at least a power source that has stopped power supply among the plurality of power sources.

  According to the second aspect of the present invention, at least when the power supply from the power source having the lower priority is stopped, the power supply is stopped by supplying the power from the power source having the higher priority. The power source is notified by displaying it on the display means.

  Thereby, the resident can clearly grasp not only the state of power use but also the power consumption of the system power supply is suppressed.

  According to a third aspect of the present invention, in the second aspect, the notification unit notifies the information indicating that the current suppliable power exceeds the power consumption, the priority order, and the power source to be stopped. .

  According to the third aspect of the present invention, the current suppliable power, the priority set among the plurality of power sources, and the stopped power source are displayed to notify the resident.

  This makes it clear that the resident can control the power consumption of the system power supply because the current suppliable power from multiple power sources exceeds the power consumption. It is possible to accurately grasp the current power source and the power source for which power supply is stopped.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the power source is set lower than the natural energy power generation means and higher than the grid power source and stored as the power source. Power storage means capable of discharging electric power is included.

  According to invention of Claim 4, an electrical storage means is included in an electric power source. The power storage means can discharge power corresponding to the amount of charge by being charged in advance, and supplies the discharged power to the electrical device.

  According to a fifth aspect of the present invention, in the fourth aspect, when the surplus power is generated in the power generated by the natural energy power generation means, the power storage means is charged.

  According to the invention described in claim 5, when surplus is generated in the generated power of the natural energy power generation means, the surplus power is charged in the power storage means, so that the generated power of the natural energy power generation means is Can be used efficiently. Here, the power charged in the power storage means is not limited to the power generated by the natural energy power generation means, but may be, for example, the power of the system power supply in the midnight time zone.

  The invention according to claim 6 uses any one of claims 1 to 3 as the power source, wherein the priority is set lower than the natural energy power generation means and higher than the system power source, and uses non-natural energy. Non-natural energy power generation means for generating electricity.

  The invention according to claim 7 is the power source according to claim 4 or claim 5, wherein the power source is set to have a lower priority than the power storage means and higher than the system power supply, and uses non-natural energy to generate power. Including non-renewable energy generation means.

  According to invention of Claim 6 and Claim 7, using the non-natural energy electric power generation means using the non-natural energy which is energy different from natural energy, such as sunlight and wind power, such as a fuel cell, as an electric power source. it can.

  The priority of the non-natural energy power generation means is set higher than the system power supply and lower than the natural energy power generation means, and when the power storage means is provided, it is set lower than the power storage means.

  By setting priorities for the non-natural energy power generation means in this way, it is possible to suppress the power consumption of the system power supply and to suppress the use of non-natural energy.

  The invention according to claim 8 includes, in claim 1 to claim 7, at least one of a solar power generation means and a wind power generation means as the natural energy generation means.

  According to the invention described in claim 8, at least one of the solar power generation means and the wind power generation means is used as the natural energy power generation means. At this time, since the priority order of the solar power generation means and the wind power generation means is set high, the generated power of the solar power generation means and the wind power generation means using natural energy is preferentially used.

  The invention according to a ninth aspect includes the maintenance means for performing a preset maintenance process on the plurality of power sources and the electrical equipment of the building according to any one of the first to seventh aspects, wherein the power The management means operates the maintenance means when surplus occurs in the generated power of the natural energy power generation means.

  When the surplus is generated only by the power generated by the natural energy power generation means, it is assumed that the power sources other than the natural energy power generation means are in a stopped state and that there are few electrical devices used in the building. From here, efficient maintenance is possible by performing maintenance of each electrical device and power source.

  As described above, the invention according to claim 1 is excellent in that power consumption of a system power supply can be suppressed by supplying power from a power source having a high priority set among a plurality of power sources. Effect.

  According to the invention described in claim 2, since the power source that has been stopped is notified, the power source that has been stopped and the power source that is being used are clarified. According to this, it is possible to accurately grasp the power source that supplies power and the power source that stops power supply.

  According to the fourth aspect of the present invention, since electric power is stored in the power storage means and used as an electric power source, it is possible to improve the power use efficiency. Moreover, according to the invention of Claim 5, the electric power generated by the natural energy power generation means can be used efficiently.

  According to the invention of Claim 6 and Claim 7, the power consumption of a system power supply can be suppressed using a non-natural energy power generation means.

  According to the eighth aspect of the invention, since the generated power of the natural energy power generation means that generates power using natural energy is preferentially consumed, the consumption of energy resources can be suppressed and the environmental load can be reduced. .

  According to the ninth aspect of the present invention, it is possible to efficiently maintain each device constituting the system without using the power of the system power supply.

It is the schematic of the principal part of the house which concerns on this Embodiment. It is a block diagram which shows the outline of a connection of an electric power source and an electric equipment. It is a block diagram which shows the outline of the connection to a power management system. It is the schematic which shows an example of U / I. (A) is a diagram which shows an example of the priority for every power source, and an example of the power value for every power source, (B) is a chart which shows an example of the power value for every power source according to (A). It is a flowchart which shows an example of the setting of the power consumption upper limit electric power with respect to a system power supply. (A) is a diagram which shows an example of the change of the consumption upper limit target for every time slot | zone, and system power, (B) is a diagram which shows an example of the change of the electric power generation for every time slot | zone of a solar power generation device. It is a flowchart which shows an example of a power management process. Each of (A) to (D) is a schematic diagram illustrating an example of display on the display in accordance with the processing of FIG. Each of (A) to (C) is a schematic diagram showing an example of display on the display according to the process of FIG. 8 together with FIGS. 9 (A) to 9 (D). It is a flowchart which shows an example of a charging process. (A) And (B) is the schematic which shows an example of the display of the display according to the process of FIG. (A) And (B) is the schematic which shows an example of the display of the display according to the process of FIG. 11 with FIG. 12 (A) and FIG. 12 (B).

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a house 10 as an example of a building according to the present embodiment. A system power source 12 such as a commercial power source is drawn into the house 10, and power is supplied from the system power source 12.

  As shown in FIG. 1, a distribution board 14 is installed in the house 10, and the system power supply 12 drawn into the house 10 is connected to the distribution board 14 via an integrated watt-hour meter (not shown). The The distribution board 14 is connected to a main switch (main breaker) having a breaking capacity determined by contract power or the total amount of power consumed by the electrical equipment used in the house 10, and connected in advance to the secondary side of the main breaker. It has a general configuration in which a large number of branch switches (branch breakers) having a set capacity are provided (all not shown).

  The house 10 is provided with various electric devices including home appliances such as a lighting fixture 16, a refrigerator 18, and an air conditioner (air conditioner) 20. In the house 10, these electric devices are connected to any branch breaker in the distribution board 14 via a wiring (indoor wiring) (not shown) or an outlet connected to the indoor wiring.

  Thereby, in the house 10, the power of the power source such as the system power supply 12 supplied to the distribution board 14 is supplied to each electrical device such as the lighting fixture 16, the refrigerator 18, and the air conditioner 20 through the main breaker and the branch breaker. Each electric device is operated by the supplied electric power. In addition, the electric equipment provided in such a house 10 can use the electric power load containing the well-known general electric equipment which uses electric power. Moreover, a well-known structure can be applied to the electrical wiring in each electric device in the house 10, and detailed description thereof is omitted here.

  By the way, the house 10 is provided with a plurality of power sources including the system power supply 12. As the plurality of power sources, natural energy power generation means using natural energy, non-natural energy power generation means using non-natural energy, and power storage means for accumulating power and discharging the stored power can be used. .

  In the house 10, as a natural energy power generation means using natural energy, a solar power generator 24 that generates electric power corresponding to the amount of received light by receiving sunlight with the solar panel 22, and a generator rotated by wind power A wind power generator 26 that generates power by being driven is provided. In the following description, the solar power generation device 24 and the wind power generation device 26 are described as examples of the power generation device using natural energy. However, the present invention is not limited to this, and any power generation device using natural energy can be applied. As long as it is provided with at least one power generation device using natural energy.

  Further, the house 10 is provided with a fuel cell (SOCF) 28 as a non-natural energy power generation means. The non-natural energy power generation means is not limited to this, but may be of any configuration, such as a power generation device of a general configuration that generates power by rotating the generator using an internal combustion engine that uses fuel as a drive source. Power generation means can be applied.

  Furthermore, the housing 10 is provided with a storage battery (battery) 30 as a power storage means. The power storage means is not limited to this, and an electric vehicle (EV) having a storage battery as an electrical energy source, a plug-in hybrid electric vehicle (PHV), or the like can be used. In the house 10, a plug-in hybrid vehicle (PHV, hereinafter referred to as a vehicle 32) is assumed to be used as a power storage unit. Hereinafter, the vehicle 32 including a storage battery provided in the vehicle 32 will be described.

  In the following description, a natural energy power generation unit, a non-natural energy power generation unit, and a power storage unit will be described. However, any power source may be used as long as it includes at least the natural energy power generation unit and the system power source 12. Although it is not necessary to include the natural energy power generation means and the power storage means, in order to suppress the power consumption of the system power 12, it is preferable that at least one of the non-natural energy power generation means and the power storage means is provided.

  As shown in FIG. 2, the house 10 is provided with a power switching device 34, and a system power source 12, a solar power generation device 24, a wind power generation device 26, a fuel cell 28, a storage battery 30, and a vehicle as a power source. 32 is connected to the power switching device 34 and supplies power to the distribution board 14 via the power switching device 34.

  Here, each of the storage battery 30 and the vehicle 32 is connected to dedicated charging / discharging devices 30 </ b> A and 32 </ b> A and connected to the power switching device 34. The charging / discharging devices 30A and 32A have an inverter function for converting DC power into AC power and a converter function for converting AC power into DC power, and the DC power is converted into AC power according to the voltage, phase, and the like of the system power supply 12. The data is converted and output to the power switching device 34.

  The charge / discharge devices 30A and 32A are connected to a branch breaker (not shown) of the distribution board 14. Thereby, charging / discharging apparatus 30A, 32A operate | moves as an electric equipment (electric power load), and converts the alternating current power supplied via the distribution board 14 into direct current power by an inverter function, and thereby the storage battery 30 and the vehicle 32. To charge. The charging / discharging device 32 </ b> A can charge / discharge the vehicle 32 when the vehicle 32 is parked and connected to a parking space (not shown) provided adjacent to the house 10.

  The charge / discharge devices 30A and 32A are applied with a general configuration for controlling charge / discharge so that the storage battery 30 and the vehicle 32 are maintained in the range of the charge amount that is in an optimal operation state. Further, when discharging the stored power, the charging / discharging devices 30A and 32A discharge from the storage battery 30 and the vehicle 32 power corresponding to the amount of power that can be discharged up to a preset power value (current value). To do.

  Each of the solar power generation device 24, the wind power generation device 26, and the fuel cell 28 converts the generated power into AC power that matches the voltage and phase of the system power supply 12 and outputs it. A known general configuration can be applied to the configuration including such an inverter function and a converter function.

  The power switching device 34 selects and distributes power of at least one system of the power of the system power supply 12, the power of each power generation means, and the power of each power storage means (hereinafter also referred to as power of each system). Output to the panel 14. In addition, the power switching device 34 is provided with, for example, a backflow prevention function, so that the power of the system power supply 12 is prevented from flowing from the power switching device 34 to the system such as the solar power generation device 24 and other systems. Is prevented from flowing to the system power supply 12.

  In addition, the power switching device 34 outputs the generated power of the power generation means using natural energy, such as the solar power generation device 24 and the wind power generation device 26, separately from the distribution board 14, so Electric power can be transmitted to the outside of the house 10, thereby selling power. The power transmission to the outside of the house 10 such as power sale is applied not only to the power generated by natural energy but also to the power generated by the fuel cell 28 and the power stored in the storage battery 30 and the vehicle 32. The power transmission destination (power sales destination) is not limited to the system power supply 12. Any configuration can be applied to the power switching device 34 as long as it satisfies the above functions.

  On the other hand, as shown in FIG. 2, the house 10 applied to the present embodiment is provided with a power management system 40 for monitoring power. The power management system 40 includes a management control panel 42.

  The management control panel 42 (power management system 40) forms a HEMS (Home Energy Management System) that manages the energy consumption of the house 10, manages the power generated by the power generation means such as the solar power generation device 24, and controls the storage battery 30 and the like. It also has functions to control charging and discharging. In addition, the management control panel 42 applied to the present embodiment performs management of power supplied to the distribution board 14, that is, management of power consumed by each electrical device in the house 10. In the following description, the management control panel 42 is provided separately from the distribution board 14. However, the distribution panel 14 and the management control panel 42 may be integrated.

  As shown in FIG. 3, the management control board 42 includes a CPU 44A, a RAM 44B, a ROM 44C, and an HDD 44D, and includes a microcomputer having a general configuration connected to a bus 44E. Various programs and data are stored in the ROM 44C and the HDD 44D used as the storage means, and the CPU 44A performs various processes by executing the programs stored in the ROM 44C and the HDD 44D. At this time, the RAM 44B is used as a work memory.

  The management control board 42 is provided with a network interface (NET I / F) 46, and the network I / F 46 is connected to a public line network such as the Internet or a dedicated line network so that the management control board 42 has a predetermined configuration. To the host server 48 (see also FIG. 2). As a result, the management control panel 42 can transmit preset data to the host server 48 and acquire various data from the host server 48, and the power management system 40 functions as a HEMS.

  The management control panel 42 is provided with a U / I (user interface) 50. As shown in FIG. 4, the U / I 50 is provided with a display 52A serving as a display means, a power switch 52B, a menu switch 52C, a speaker 52D, and the like. The display 52A is, for example, a touch panel type using an LCD, thereby displaying various information and touching the display surface (hereinafter referred to as “operation”), thereby displaying a user interface (displayed on the display 52A) ( Various information input operations according to the UI) are possible.

  As shown in FIG. 3, the U / I 50 is connected to a bus 44E. As a result, the CPU 44A displays various types of information including information that causes the display 52A of the U / I 50 to function as notification means. Further, the CPU 44A displays a preset UI on the display 52A, and functions as an input means for inputting various types of information by a touch operation corresponding to this display. As the monitoring control panel 42, any configuration in which the U / I 50 including the display 52 </ b> A is separately provided and the U / I 50 is connected to the monitoring control panel 42 can be applied.

  The management control board 42 is provided with an input / output interface (input / output I / F) 54, and the input / output I / F 54 is connected to the bus 44E. In the HEMS, it is preferable that each electrical device is connected to the management control panel 42 so that information such as data and control signals can be exchanged. As a result, the management control panel 42 can grasp whether or not each electrical device is operating, the operating state such as power consumption when it is operating, the maintenance state, and the like, and if necessary, Activation / deactivation can be controlled.

  From here, in the house 10 which concerns on this Embodiment, the management control board 42 is provided with the communication unit 56. FIG. In the management control panel 42, the communication unit 56 is connected to the input / output I / F 54. The management control panel 42 is connected via the communication unit 56 so that information can be exchanged with each electrical device. As such a communication unit 56, the management control board 42 and each electric apparatus may be connected by wire, and may perform wireless communication. In addition, as the communication unit 56, any communication method such as communication via a power line, communication via an indoor network using a communication line installed in the house 10 (building) can be applied.

  On the other hand, in the management control panel 42, the power switching device 34 is connected to the input / output I / F 54. The input / output I / F 54 of the management control panel 42 is connected to the solar power generation device 24, the wind power generation device 26, the fuel cell 28, the charge / discharge device 30A of the storage battery 30, and the charge / discharge device 32A of the vehicle 32. Yes.

  As a result, the management control panel 42 acquires whether or not each of the solar power generation device 24 and the wind power generation device 26 is operating, and the generated power when it is operating. The management control panel 42 controls power generation of the fuel cell 28 and controls charging / discharging of the storage battery 30 and the vehicle 32 by controlling the operation of the charging / discharging devices 30A, 32A.

  As shown in FIG. 2, the distribution board 14 is provided with a power sensor (power meter) 58. The power sensor 58 detects the power consumed by the operation of each electrical device by the power supplied from the distribution board 14 (instantaneous value of power consumption, hereinafter referred to as power consumption), and uses the detected power consumption. A corresponding signal is output. As shown in FIG. 3, the management control panel 42 is provided with an A / D converter 60, and a power sensor 58 is connected to the input / output I / F 54 via the A / D converter 60.

  The management control panel 42 detects the power consumption Pc consumed in the house 10 when a detection signal is input from the power sensor 58. The management control panel 42 manages the power consumption in the house 10 by controlling the operation of the power switching device 34 according to the power consumption Pc detected by the power sensor 58. Although the power sensor 58 is used here, the present invention is not limited to this. For example, the current sensor (ammeter) is used to calculate and obtain the power consumption (power consumption value) from the current value detected by the current sensor. Any configuration can be applied as long as it is a configuration that detects the power consumption consumed at 10.

  Here, the management control panel 42 detects the power supplied from each system and the power consumption Pc consumed in the house 10, and based on the power consumption Pc and the power that can be supplied from each power source at the present time. The power source to be supplied to the power board 14 is selected, and the operation of the power switching device 34 is controlled so that power is supplied from the selected power source to the power distribution board 14.

  In the management control panel 42, priority is set for the power source that supplies power to the distribution board 14, and based on this priority, the power source is selected so that the supplied power exceeds the power consumption Pc. To do.

  Here, FIG. 5A shows an example of the priority order set for each power source. 5A illustrates a solar power generation device 24 as a natural energy power generation means, a vehicle 32 (PHV) as a power storage means, and a fuel cell (SOFC) 28 as a non-natural energy power generation means.

  In the present embodiment, the priority of the solar power generation device 24 (and the wind power generation device 26) that generates power using natural energy is set to the highest priority (first priority), and the priority of the system power supply 12 is set to the lowest. (4th priority). Further, in the present embodiment, the priority order of the vehicle 32 (and the storage battery 30) is set to the second order, which is higher than the priority order of the fuel cells 28 that use non-natural energy (the third priority order).

  Thereby, the management control panel 42, when the sum total of the generated power Ps of the solar power generator 24 and the generated power Pw of the wind power generator 26 exceeds the power consumption Pc, the generated power Ps of the solar power generator 24 and the wind power generator The generated power Pw of 26 is supplied to the distribution board 14, and the power supply from other power sources is stopped. In addition, when one of the solar power generation device 24 or the wind power generation device 26 is operating, the power of the operating power generation device is supplied to the distribution board 14.

  In addition, the management control panel 42 is configured such that the power consumption Pc is the generated power Ps of the solar power generator 24, the generated power Pw of the wind power generator 26, the storage battery 30 and the discharge power Pd of the vehicle 32 (the discharge power Pd is the storage battery 30 or If the sum of the electric power discharged from one of the vehicles 32, the electric power discharged from both the storage battery 30 and the vehicle 32), and the sum of the generated power Pf of the fuel cell 28 is exceeded, the system of the system power supply 12 together with these generated power The power switching device 34 is actuated so as to supply the distribution board 14 with the electric power plus the electric power Pa. Thereby, in the power management system 40, the power consumption Pa of the system power supply 12 is suppressed.

  On the other hand, the management control panel 42 displays a predetermined UI on the display 52A, so that an upper limit target value (consumed upper limit power Pm (kw)) supplied from the system power supply 12 and consumed can be input. It has become. In the power monitoring system 40, the occupant can arbitrarily set the consumption upper limit power Pm within a range within the breaking capacity of the main breaker of the distribution board 14. The management control panel 42 stores the consumption upper limit power Pm when the consumption upper limit power Pm is input.

  5A and 5B show an example of current power use, current available power, set power, and suppliable power for each power source. As shown in FIG. 5A, a solar power generation device 24 (wind power generation device 26), a fuel cell (SOFC) 28, and a vehicle 32 (storage battery 30), which are power sources (non-system power supply) excluding the system power supply 12, are provided. The maximum output power (rated power) is the suppliable power, and the set power at the normal output is set within the suppliable power. For example, in the vehicle 32, it is necessary to leave electric power for traveling. From here, in the management control panel 42, the set power of the storage battery 30 and the vehicle 32 is set lower than the suppliable power. Moreover, in the solar power generation device 24 and the wind power generation device 26, the power that can be supplied is set as it is.

  On the other hand, in the system power supply 12, the power that can be supplied is, for example, contract power for the house 10, and the interruption capacity of the main breaker provided in the distribution board 14. For the system power supply 12, the upper limit power consumption Pm corresponds to the set power.

  In addition, the currently available power corresponds to the currently available power of the present invention. In the photovoltaic power generation device 24 and the fuel cell 28, the generated power at that time corresponds to the storage battery 30 and the vehicle 32. In the power storage means, the dischargeable power at that time corresponds. On the other hand, the management control panel 42 is configured so that the set power, that is, the consumption upper limit power Pm corresponds to the currently available power in the system power supply 12. Note that the current power consumption is the power consumed by the output of each power source at the current time.

  FIG. 5B shows an example of each power value. Here, the power consumption Pc (current power consumption) in the house 10 is 8 kw, and this power consumption Pc is covered by the generated power Ps of the solar power generation device 24, the discharged power Pd of the vehicle 24, and the generated power of the fuel cell 28. If possible, the power (system power Pa) supplied from the system power supply 12 can be made zero. That is, the necessary power can be supplied to the electrical equipment that is in use (operating) in the house 10 at that time without using the power of the system power supply 12.

  As described above, in the power management system 40, the resident sets the upper limit power consumption Pm corresponding to the set power for the system power supply 12. As a result, the management control panel 42 uses the power of the system power supply 12 within the range of the consumption upper limit power Pm.

  Here, FIG. 6 shows an outline of setting of the upper limit power consumption Pm. The upper limit power consumption Pm is set by, for example, operating a menu switch 52C of the display 52A to display a user interface (UI) for setting the upper limit power consumption Pm.

  In this flowchart, the time zone is designated in the first step 100, and in the next step 102, the upper limit power consumption Pm for the designated time zone is input. Further, in step 104, it is confirmed whether or not the setting is completed, and the upper limit power consumption Pm for all the time zones is set, so that an affirmative determination is made in step 104, and the routine proceeds to step 106. In this step 106, the upper limit power consumption Pm for each set time zone is stored in the HDD 44D, and the process ends.

  Further, when the upper limit power consumption Pm for the next time zone is set, a negative determination is made in step 104, the process proceeds to step 100, and the upper limit power consumption Pm for the next time zone is set. When the upper limit power consumption Pm is changed for a part of the time zone, the corresponding time zone is selected in step 100 and the upper limit power consumption Pm for the time zone selected in step 102 is input.

  Here, the time zone can be set in units of one hour, whereby the consumption upper limit power Pm is set every hour for 24 hours per day. In addition, the time zone is preferably divided into about one hour, but is not limited to this, and may be in units of two hours, taking into account the daily life cycle of the resident and the charge of the system power supply 12. Can be classified. In this case, for example, from 11 pm to 6 am (midnight and early morning), from 6 am to 9 am (morning), from 9 am to 4 pm (daytime), from 4 pm to 6 pm (evening) Obi), 6:00 pm to 11 pm (nighttime), etc.

  FIG. 7A shows an example of a pattern of the upper limit power consumption Pm. In this consumption upper limit power Pm pattern, for example, the power of the grid power supply 12 that can be used in the midnight time zone where the electricity charge of the grid power supply 12 is relatively low is set relatively high. Thereby, in the house 10, the storage battery 30 and the vehicle 32 using the late-night power can be charged.

  Moreover, the solar power generation device 24 is provided in the house 10. FIG. 7B shows an example of a change in the generated power Ps of the solar power generation device 24. The solar power generation device 24 operates to start power generation when the outdoors is brighter than a predetermined brightness (for example, from about 8:00 am). Moreover, in the solar power generation device 24, large generated power Ps can be obtained during the daytime when the sunlight is strong (for example, from about 9 am to about 4 pm), and the day is inclined (for example, after 4 pm). The generated power Ps decreases, and it stops when the sun goes down. Therefore, during the daytime, the generated power Ps of the solar power generator 24 can be used as the power consumed in the house 10.

  From this, in the pattern of the consumption upper limit power Pm shown in FIG. 7A, the upper limit consumption power Pm during the daytime (for example, from 9:00 am to about 3:00 pm) is set low. Note that the upper limit power consumption Pm is stored in advance in accordance with not only the contract power but also the floor area of the house 10, the number of residents, the age configuration, etc., and any of the patterns stored by the residents. May be temporarily selected, and the selected pattern may be changed according to the resident's preference.

  The management control board 42 monitors the power consumption Pa of the system power 12 when supplying the system power Pa of the system power supply 12 to the distribution board 14. At this time, when the power consumption Pa exceeds the power consumption upper limit power Pm, the management control panel 42 issues an alarm so as to prompt the resident to suppress power. In addition, the alarm at this time is configured such that, on the display 52A, an arbitrary display that prompts suppression of power consumption in the house 10 is displayed together with information that the system power Pa of the system power supply 12 exceeds the consumption upper limit power Pm. Applicable. Further, not only display on the display 52A but also any visual and auditory notification methods such as notification by voice can be applied.

  In addition, the management control panel 42 displays, on the display 52A, the generated power Ps of the solar power generator 24, the generated power Pw of the wind power generator 26, the generated power of the fuel cell 28, the discharged power of the storage battery 30 and the vehicle 32, and each of them. In addition to displaying the power consumption relative to the power, by displaying the power supplied from the system power supply 12 (system power Pa) and the consumption upper limit power Pm for that time zone, the usage status of the power is clearly indicated to the resident. Yes. A known general configuration can be applied to the display of the generated power and the power consumption of each power source.

  Hereinafter, an example of the operation of the power management system 40 will be described. The management control panel 42 applied to the present embodiment includes the generated power Ps of the solar power generation device 24, the generated power Pw of the wind power generation device 26, the discharge power Pd when the storage battery 30 and the vehicle 32 can be discharged, and the fuel cell 28. The generated electric power Pf that can be supplied when operating is acquired, and the electric power consumption Pc is detected. After that, by selecting in order from the power source with the highest priority so that power exceeding the power consumption Pc is obtained, the power source supplied by the power that covers the power consumption Pc is set, and the power is supplied from the set power source. The power switching device 34 is operated so as to be supplied to the distribution board 14.

  Thus, in the present invention, when the power that can be supplied from each power source currently exceeds the power consumption, power is supplied from the power source with higher priority, and the power source with lower priority is stopped (power Stop supply).

  FIG. 8 shows an example of processing executed by the management control board 42 at this time. This flowchart is executed at a preset time interval (for example, about 1 minute to 10 minutes) in a state where the consumption upper limit power Pm for the system power supply 12 is set. In the initial state of the power management system 40, for example, power corresponding to the power consumption Pc is supplied to the distribution board 14 while the power supplied from the system power 12 is equal to or lower than the consumption upper limit power Pm. The power exceeding the power consumption Pc is being supplied to the distribution board 14.

  In the first step 110 of this flowchart, the power consumption Pc is detected by reading a signal input from the power sensor 58. At the same time, in step 112, it is confirmed whether or not the solar power generation device 24 and the air volume power generation device 26 are operating (whether or not power generation is in progress). At this time, if at least one of the solar power generation device 24 and the wind power generation device 26 is operating (power generation), an affirmative determination is made in step 112 and the process proceeds to step 114.

  In this step 114, the generated power Ps of the operating solar power generation device 24 and the generated power Pw of the wind power generation device 26 are read (detected), and the generated power Pg (Ps + Pg) using natural energy as the current supplyable power. Is calculated. In addition, when only one of the solar power generation device 24 or the wind power generation device 26 is generating power, the generated power Pg is the power output from one.

  In the next step 116, it is confirmed whether or not the generated power Pg exceeds the consumed power Pc by comparing the generated power Pg and the consumed power Pc. If the generated power Pg exceeds the consumed power Pc (Pg > Pc), affirmative determination is made at step 116, and the routine proceeds to step 118. In this step 118, the occupant is notified by displaying on the display 52A that the power consumed in the house 10 can be covered by the generated power Pg.

  FIG. 9A shows an example of display on the display 52A at this time. The display screen 62 displays a message 62A indicating that solar power generation and wind power generation are performed and the generated power Ps and Pw can be used, and a message 62B using the generated power Ps and Pw. In the management control panel 42, the first place is the photovoltaic power generation device 24 and the wind power generation device 26, the second place is the storage battery 30 and the vehicle (PHV) 32, the third place is the fuel cell (SOFC) 28, the fourth place. The priority is set and stored as the system power supply 12. The management control board 42 displays this priority table 62C on the display screen 62 of the display 52A.

  Thereby, the resident can clearly grasp the current priority setting, the power source that can supply power to the current power consumption Pc, and the power source to be stopped from the display on the display 52A.

  In FIG. 8, the process proceeds to step 120 at a predetermined timing, and the power switching device 34 is operated so that the generated power Ps of the solar power generator 24 and the generated power of the wind power generator 26 are supplied to the distribution board 14. At this time, the supply of the system power Pa to the distribution board 14 is stopped by shutting off the system power supply 12.

  Thereby, in the house 10, only the electric power generated by the solar power generation device 24 and the wind power generation device 26 is consumed. When only one of the solar power generator 24 or the wind power generator 26 is operating, only the operating power generator is displayed on the display 52A, and the operating power generator is displayed on the distribution board 14. Ensure that only device power is supplied.

  In addition, when the difference between the power consumption Pc and the generated power Pg is small, if only the generated power Pg of the generated power Pg is supplied, the power consumption Pc exceeds the generated power Pg when a new electric device is activated. In order to suppress this, for example, when it is determined that the generated power Pg exceeds the power consumption Pc, it is preferable to provide a margin (for example, Pg> Pc + α). Further, when a change in the power consumption Pc is measured and there is a possibility that the power consumption Pc increases and exceeds the generated power Pg, the power consumption Pc exceeds the suppliable power (in this case, the generated power Pg). Apply methods such as making judgments.

  Thereafter, in step 122, the display 52A is displayed with a message indicating that the generated power Pg of the solar power generator 24 and the wind power generator 26 is used and the power of the system power supply 12 is not used (not used). By switching, the information is notified to the resident.

  FIG. 9B shows an example of display on the display 52A at this time. In this display screen 64, for example, a message 64A indicating that “power of solar power generation and power of wind power generation” is used, and a message such as “the power supply from the system power supply is“ 0 kW ””. 64B is displayed. Note that the display screen 64 may clearly indicate the power used (for example, “solar power generation OO kw”, “wind power generation OO kw”, etc.). In addition, this display may be displayed for a preset time, or may be continued when the state where power supply from the system power supply 12 is stopped is continued.

  On the other hand, if the generated power Pg is insufficient (Pg ≦ Pc), a negative determination is made in step 116 in FIG. In this step 124, the discharge power Pd of the storage battery 30 and the vehicle 32 is detected, and the suppliable power Pb including the discharge power Pd is calculated. The discharge power Pd is only the discharge power of the storage battery 30 when the vehicle 32 is not in a parking space and is not connected to the charge / discharge device 32A, and the remaining capacity of both the storage battery 30 and the vehicle 32 is small. When the discharge cannot be performed, the discharge power Pd = 0. When there is no generated power Pg (Pg = 0, when negative determination is made in step 112), the suppliable power Pb = Pd.

  In the next step 126, the generated power Pg and the consumed power Pc are compared to determine whether or not the suppliable power Pb exceeds the consumed power Pc. At this time, if the suppliable power Pb exceeds the power consumption Pc (Pc <Pb, where Pb = Pg + Pd), an affirmative determination is made at step 126 and the routine proceeds to step 128. In step 128, the display 52A uses a message indicating that the power consumed in the house 10 can be covered by the generated power Pb and the discharged power Pd of the storage battery 30, and the generated power Pb and the discharged power Pd. Notify the resident by displaying a message.

  FIG. 9C shows an example of display on the display 52A at this time. On this display screen 66, a priority table 62C is displayed. Further, the display screen 66 indicates that solar power generation and wind power generation are performed, the generated power Ps and Pw can be used, and the discharge power Pd of the storage battery 30 and the vehicle 32 can be used. A message 66A and a message 66B indicating that the discharge power Pd is used for the generated power Pg (generated power Ps, Pw) are displayed.

  In FIG. 8, the process proceeds to step 130 at a predetermined timing, and the generated power Ps of the solar power generator 24, the generated power Pw of the wind power generator 26, and the discharged power Pd of the storage battery 30 and the vehicle 24 are supplied to the distribution board 14. Thus, the power switching device 34 is operated. At this time, the charging / discharging devices 30 </ b> A and 32 </ b> A are operated and the system power supply 12 is shut off to stop the supply of the system power Pa to the distribution board 14.

  Thereby, in addition to the generated power Ps and Pw of the solar power generation device 24 and the wind power generation device 26, the discharge power Pd of the storage battery 30 and the vehicle 32 is supplied to the distribution board 14. And only the electric power generated by the wind power generator 26 is consumed.

  Thereafter, in step 132, the display 52A is displayed using the generated power Pg of the solar power generator 24 and the wind power generator 26, and the discharged power Pd of the storage battery 30 and the vehicle 32, and the power of the system power supply 12 is used. Switch to a message indicating that it is not (not used). In addition, when the electric power of only one of the storage battery 30 or the vehicle 32 is usable, the power storage means that can be used is displayed, and only the discharge power Pd of the power storage means that can be used is supplied to the distribution board 14. So that

  FIG. 9D shows an example of display on the display 52A at this time. In this display screen 68, for example, a message 68A indicating that “photovoltaic power generation, wind power generation power, storage battery discharge power, and vehicle 32 (PHV) discharge power” is used, and “system power supply”. The message 68B such as “The power supply from is“ 0 kW ”” is displayed.

  However, if the suppliable power Pb is insufficient with respect to the power consumption Pc (Pb ≦ Pc), a negative determination is made in step 126 in FIG. In this step 134, the generated power Pf (power that can be supplied by the fuel cell 28) when the fuel cell 28 is operated is read, and the power obtained by adding the generated power Pf of the fuel cell 28 to the generated power Pg and the discharged power Pd at the present time. Is calculated as Pb (Pb = Pg + Pd + Pf).

  In the next step 136, the calculated suppliable power Pb and the consumed power Pc are compared to determine whether or not the suppliable power Pb exceeds the consumed power Pc. At this time, if the suppliable power Pb exceeds the power consumption Pc (Pc <Pb, Pb = Pg + Pd + Pf), an affirmative determination is made in step 136 and the process proceeds to step 138.

  In step 138, the power obtained by removing the discharge power Pd from the calculated supplyable power Pb is calculated as the current supplyable power Pb (Pb = Pg + Pf). In the next step 140, the calculated suppliable power Pb and the consumed power Pc are compared, and it is determined whether or not the suppliable power Pb exceeds the consumed power Pc.

  Here, when the suppliable power Pb excluding the discharge power Pd exceeds the power consumption Pc (Pc <Pb (Pb = Pg + Pf)), an affirmative determination is made in step 140 and the process proceeds to step 142. In this step 142, The display 52A, together with the priority order table 62C, can supply the power consumed in the house 10 by the generated power Pb of the solar power generator 24 and the wind power generator 26 and the generated power Pf of the fuel cell 28. And a message using solar power, wind power, and power generated by the fuel cell are displayed to inform the resident (illustration of the display screen is omitted).

  Thereafter, the process proceeds to step 144 at a predetermined timing, the fuel cell 28 is operated to start power generation, and the generated power Ps of the solar power generation device 24, the generated power Pw of the wind power generation device 26, and the power generation of the fuel cell 28. The power switching device 34 is operated so that the power Pf is supplied to the distribution board 14. At this time, the charging / discharging devices 30 </ b> A and 32 </ b> A and the system power supply 12 are shut off to stop the supply of power from the storage battery 30, the vehicle 32, and the system power supply 12 to the distribution board 14.

  Thereby, in addition to the power generation power Ps and Pw of the solar power generation device 24 and the wind power generation device 26, the power generation power Pf of the fuel cell 28 is supplied to the distribution board 14, and in the house 10, the solar power generation device 24, the wind power Electric power generated by the power generation device 26 and the fuel cell 28 is consumed.

  Thereafter, in step 146, the power of the storage battery 30, the vehicle 32, and the system power supply 12 is used for the display 52A using the generated power Pg of the solar power generation device 24, the wind power generation device 26, and the fuel cell 28. Switch to a message indicating that it is not (not used).

  On the other hand, when the suppliable power Pb excluding the discharge power Pd (Pb = Pg + Pf) does not exceed the power consumption Pc (Pb <Pc, that is, Pc ≧ Pb), a negative determination is made in step 140 and step 148 is performed. Migrate to In this step 148, the power consumed in the house 10 can be supplied to the display 52A together with the priority table 62C by the generated power Pb, the discharged power Pd of the storage battery 30, etc., and the generated power Pf of the fuel cell 28. And a message that uses the power of these power sources (the power other than the power of the system power source) are displayed to notify the resident. (The display screen is not shown).

  Thereafter, the routine proceeds to step 150 at a predetermined timing, and the fuel cell 28 is operated to start power generation, and the generated power Ps of the solar power generator 24, the generated power Pw of the wind power generator 26, the storage battery 30 and the vehicle 32. The power switching device 34 is operated so that the discharge power Pd and the generated power Pf of the fuel cell 28 are supplied to the distribution board 14. At this time, the supply of the system power Pa to the distribution board 14 is stopped by shutting off the system power supply 12.

  Thereby, in addition to the generated power Ps of the solar power generation device 24 and the wind power generation device 26, the discharge power of the Pw fuel cell 30 and the vehicle 32, the generated power Pf of the fuel cell 28 is supplied to the distribution board 14, and the house 10 Then, the electric power supplied from the solar power generation device 24, the wind power generation device 26, the storage battery 30, the vehicle 32, and the fuel cell 28 is consumed.

  Thereafter, in step 152, the display 52A is displayed using the solar power generation device 24, the wind power generation device 26, the storage battery 30, the vehicle 32, and the fuel cell 28, and the power of the system power supply 12 is not used (non- Switch to a message indicating use).

  On the other hand, if all of the power sources with higher priorities of the system power supply 12 are used and the current supplyable power Pb does not exceed the power consumption Pc (Pc ≧ Pb), a negative determination is made in step 136. To step 154. In this step 154, the consumption upper limit power Pm set for the current time zone is read, and in the next step 156, the consumption power Pc is compared with the consumption upper limit power Pm so that the consumption power Pc becomes the consumption upper limit power. It is confirmed whether or not the power Pm is exceeded.

  If the power consumption Pc does not exceed the consumption upper limit target Pm (Pc ≦ Pm), an affirmative determination is made in step 156 and the routine proceeds to step 158. In this step 158, the electric power consumed in the house 10 is supplied to the display 52A by the generated power Pb, the discharged power Pd of the storage battery 30, etc., the generated power Pf of the fuel cell 28, and the system power Pa supplied from the system power source 12. In addition to indicating that the power can be covered, a display for notifying that the generated power Pb, the discharged power Pd, the generated power Pf, and the system power Pa are used is displayed.

  FIG. 10A shows an example of display on the display 52A at this time. On this display screen 70, a message 78A indicating that it is necessary to supply power from the system power supply 12 in order to cover the current power consumption Pc is displayed, and the power of the system power supply 12 is supplied to the distribution board 14. A message 70B indicating this is displayed. The message 70 </ b> B is not limited to this, and it is more preferable that the occupant clearly displays the power source used, such as displaying all the power sources used.

  In FIG. 8, the power switching device 34 is operated so as to supply the generated power Pg, the discharged power Pd, the generated power Pf, and the system power Pa to the distribution board 14 by moving to the next step 160. Thus, the generated power Ps of the solar power generation device 24, the generated power Pw of the wind power generation device 26, the storage battery 30 and the vehicle 32 and the discharge power Pd, the generated power P of the fuel cell 28, and the system power Pa of the system power supply 12 are divided. The electric power is supplied to the panel 14 and supplied to each electric device used in the house 10. When there is no generated power Pg and no discharged power Pd, substantially only the system power Pa is supplied to the distribution board 42. Even in this case, the power consumption Pc is equal to or lower than the upper limit power consumption Pm, so that at least the resident's consumption target is achieved.

  In the next step 162, a display for notifying that the power of each power source is being used is displayed on the display 52A. At this time, only the power source that outputs power may be displayed, or the power supplied from each power source may be displayed on the display 52A.

  On the other hand, when the power consumption Pc exceeds the consumption upper limit power Pm (Pc> Pm), a negative determination is made in step 156 and the process proceeds to step 164. In this step 164, it is informed that the power consumption Pc is excessive, and a request to stop any of the electrical devices is made to promote suppression of power consumption.

  FIG. 10B shows an example of display on the display 52A at this time. On this display screen 72, a message 72A indicating that the power consumption exceeds the upper limit (consumption upper limit power Pm) of the consumption target of the system power supply 12 is displayed. In addition, the display screen 72 displays a message 72B requesting to stop the operation of any electrical device.

  The display screen 72 may display, for example, an electric device that is in operation, thereby facilitating selection of an electric device that the resident stops (an electric device that is refrained from use). Also, the priority order of use is set in advance for each electrical device and stored in the management control panel 42 so that the management control panel 42 displays the lowest priority electrical device among the operating electrical devices. Also good.

  FIG. 10C illustrates an example of display on the display 52A based on the priority order of the electrical devices. On this display screen 74, a message 74A is displayed together with the message 72A to prompt the stop of the electric device with the lowest priority among the electric devices in operation. The display screen 72 urges the air conditioner to stop as an example. By displaying the display screen 74 on the display 52A, it becomes easy to grasp and select an electrical device that the resident stops. In this case, the management control panel 42 may be configured to forcibly stop the displayed low-priority electrical equipment after receiving a stop instruction from a resident or after a preset time has elapsed. Thus, the power consumption Pc can be suppressed to the power consumption upper limit power Pm or less.

  In step 158, where the power consumption Pc does not exceed the consumption upper limit power Pm and the determination is affirmative in step 156, the process proceeds to step 158 where power is supplied to the distribution board 14 from all power sources including the system power supply 12. However, the present invention is not limited to this, and for example, the discharge from the storage battery 30 and the vehicle 32 may be stopped, so that charging can be performed at a preset time. In addition, the power generation of the fuel cell 28 may be stopped, whereby the consumption of fuel (non-natural energy) used for power generation can be suppressed.

  Further, when the power consumption Pc does not exceed the consumption upper limit power Pm, even if the power generation of the solar power generation device 24 and the wind power generation device 26 is stopped, the discharge of the storage battery 20 and the vehicle 32, the fuel cell 28 The operation (power generation) may be stopped. In this case, the resident may select whether to stop (whether only the grid power supply 12 is supplied to the distribution board 14).

  Even if the power consumption Pc exceeds the consumption upper limit power Pm, the system power Pa of the system power supply 12 is supplied to the power consumption upper limit power by supplying the generated power Pg of the solar thermal power generation device 24 and the wind power generation device 26. When Pm is not exceeded, in step 158, the discharge of the storage battery 30 and the vehicle 32 and the operation of the fuel cell 28 may be stopped.

  As described above, the management control panel 42 uses the power consumption Pc to cover the power generation power Pg of the solar power generation device 24 and the wind power generation device 26 and the discharge power Pd of the storage battery 30 and the vehicle 32, or the power generation power of the fuel cell 28. The power corresponding to the power consumption Pc is covered. Thereby, as FIG. 5 shows, the system electric power Pa (current electric power used) of the system power supply 12 can be made into zero.

  Therefore, for example, as shown in FIG. 7A, the system power Pa supplied from the system power supply 12 can be suppressed in the daytime when the generated power Ps of the solar power generation device 24 is large. In general, there is a time zone in which the power consumption Pc increases during the daytime, but the grid power Pa is reduced to zero by supplying the power generation power Ps of the photovoltaic power generation device 24 to the distribution board 14 preferentially during this time zone. Can be suppressed. At this time, the management control panel 42 preferentially supplies the electric power generated using the natural energy in the house 10 to the electric equipment provided in the house 10 to perform so-called self-produced self-extinguishment.

  In the above description, the power that can be supplied in order from the power source with the highest priority is detected, and the power source is selected so that the detected power exceeds the power consumption Pc. This is not a limitation.

  For example, power that can be supplied from each power source is acquired, and the power that has the lowest priority is set such that the power to be supplied is set to exceed the power consumption Pc by selecting power from the power sources having the highest priority in order. Any configuration can be applied as long as the power supplied from the system power supply 12 as a source is suppressed.

  Further, in steps 118, 128, 142, and 148 of FIG. 8, the power source that is confirmed that the suppliable power Pb exceeds the power consumption Pc is displayed, and the power is displayed at a timing such as after a preset time has elapsed. The power of the power source is supplied to the distribution board 14. However, the present invention is not limited to this. For example, a display prompting the resident's instruction is displayed on the display screen (display screens 62, 66, etc.) displayed on the display 52 </ b> A. Anyway.

  In this case, power may be supplied from the power source to the distribution board 14 when a resident instruction is input based on the display on the display 52A or when a predetermined time has elapsed.

  On the other hand, if there is a surplus in the generated power, it can be used for charging the storage battery 30 and the vehicle 32. That is, the management control panel 42 charges the storage battery 30 and the vehicle 32 using midnight power. In addition, when surplus occurs in the generated power Pg or the total generated power Ptg, the management control panel 42 performs charging of the storage battery 30 and the vehicle 32, power sale, maintenance processing of the power management system 40, and the like.

  In the management control panel 42, for example, a maintenance program for diagnosing its own operating state is stored in the HDD 44D. When surplus power is generated in the generated power Pa (the sum of the generated power Ps and the generated power Pw), the management control panel 42 executes a maintenance program to perform self-diagnosis of the operation state of the management control panel 42 and the management control panel. System maintenance such as confirmation of the communication state between each device (electrical equipment, each power generation device, etc.) connected to the management control panel 42 and confirmation of the operation state of each device connected to the management control panel 42 Execute.

  FIG. 11 shows an outline of a charging process (surplus power process) including a process for surplus power among the power generated in the house 10. Here, the sum of the generated power Ps of the solar power generator 24, the generated power Pw of the wind power generator 26, and the generated power of the fuel cell 28 is defined as the total generated power Ptg, and the solar power generator 24 and the wind power generator 26 are used. The fuel cell 28 is collectively referred to as “power generation device”.

  This flowchart is executed in parallel with, for example, the power management process shown in FIG. 8. In the first step 170, the power generation state of each power generation device of the solar power generation device 24, the wind power generation device 26 and the fuel cell 28 is read. In step 172, it is confirmed whether any power generator is operating.

  Here, if any of the power generation devices is operating, an affirmative determination is made in step 172. Thereby, in the next step 174, the total generated power Ptg is acquired, and in step 176, the power consumption Pc is acquired.

  The total generated power Ptg is, for example, when only the solar power generation device 24 is generating power, the generated power Ps is the total generated power Ptg, and when the wind power generation device 24 and the fuel cell 28 are generating power, respectively. Is the total generated power Ptg. Further, the total generated power Ptg may not include the generated power of the fuel cell 28, thereby using surplus power of the generated power Pg of the solar power generation device 24 and the wind power generation device 26 using natural energy. Processing is possible.

  In the next step 168, it is confirmed whether or not the total generated power Ptg exceeds the power consumption Pc. That is, it is confirmed whether or not the system power Pa of the system power supply 12 is used and whether or not the storage battery 30 and the vehicle 32 are discharged. In other words, if the total power generation Ptg exceeds the power consumption Pc, the power supply from the system power supply 12 is stopped, and the total power generation Ptg not including the discharge power Pd exceeds the power consumption Pc. Thus, it can be determined that the discharge from the storage battery 30 and the vehicle 32 is stopped.

  Here, if the total generated power Ptg exceeds the power consumption Pc, the surplus power is obtained, and an affirmative determination is made in step 178 and the routine proceeds to step 180. In this step 180, the charge states of the storage battery 30 and the vehicle 32 are read, and in the next step 182, it is confirmed whether or not charging is possible. At this time, for example, if the vehicle 32 is out and is not connected to the charging / discharging device 32A, the vehicle 32 cannot be charged. Moreover, if the electric power to the upper limit is accumulate | stored in the storage battery 30, the charge to the storage battery 30 will become impossible.

  Here, if at least one of the storage battery 30 and the vehicle 32 can be charged, an affirmative determination is made in step 182 and the process proceeds to step 184 to display on the display 52A that charging with surplus power is possible, for example. To inform the resident. Thereby, when an instruction to start charging is given, an affirmative determination is made in step 186 and the process proceeds to step 188 to start a charging process based on the designation.

  FIGS. 12A and 12B show an example of display on the display 52 </ b> A in step 184. Here, on the display screen 76 shown in FIG. 12 (A), a message 76A indicating that the storage battery 30 or the vehicle 32 can be charged with the power being generated is displayed. The message 76A shows an example in which generated power Ps and Pw by natural energy is applied as the total generated power Ptg.

  Further, on the display screen 76, a message 76B and a charge button 76C for instructing to charge the storage battery 30, a message 76D and a charge button 76E for instructing to charge the vehicle 32, and a cancel button 74F. Is provided. Thereby, one of the charging buttons 76C and 76E is operated, and the charging process based on the instruction is started. In addition, if the vehicle 32 is leaving, only the display regarding the storage battery 30 should be performed without displaying the vehicle 32, and if the charging to the storage battery 30 is unnecessary, only the display regarding the vehicle 32 may be performed. . Moreover, what is necessary is just to change the expression regarding the generated electric power of natural energy, when the electric power generated of the fuel cell 28 is included.

  If the cancel button 76F is operated, a negative determination is made in step 186 in FIG. 11, and charging is stopped. If the predetermined time has elapsed, charging may be stopped (No in step 186). However, a priority order of charging is set between the storage battery 30 and the vehicle 32, and the display screen 74 is displayed. If there is no response, charging to a higher priority may be started.

  On the other hand, between the storage battery 30 and the vehicle 32, there may be a difference in charging efficiency between charging the storage battery 30 and charging the vehicle 32 due to a difference in remaining capacity. From this, it is possible to select the one with higher charging efficiency and recommend charging. FIG. 12B shows an example of the display at this time. In this display screen 78, a message 78A indicating that the charging efficiency when charging the vehicle 32 is higher than when charging the storage battery 30 is displayed together with a message 78B indicating that charging with surplus power is possible. .

  On the display screen 78, a charging button 78C and a cancel button 78D for instructing charging are displayed. By operating the charging button 78C, charging of the charging target (here, the vehicle 32) displayed in the message 78B is started. Is done. It should be noted that a display for confirming charging to the storage battery 30 that is assumed to have low charging efficiency may be performed by operating the cancel button 78D, or charging may be stopped.

  On the other hand, in FIG. 11, when a negative determination is made in step 182 or step 186, the process proceeds to step 190. In step 190, a display for notifying that surplus power can be output to the outside is performed.

  FIG. 13A shows an example of display on the display 52A at this time. In this display screen 80, a message 80A indicating that there is room for power transmission to the outside, a message 80B for confirming whether or not to transmit power, a power transmission button 80C for instructing power transmission, and a cancel button 80D for instructing stop of power transmission are displayed. Is provided.

  In FIG. 11, it is confirmed in the next step 192 whether or not an output of power to the outside (power transmission) has been instructed. At this time, if the power transmission button 80C is operated, an affirmative determination is made in step 192, the process proceeds to step 194, and power transmission is started. In the power monitoring system 40, it is possible to output power from the power switching device 34 to the outside (see FIG. 2), and the management control panel 42 proceeds to step 194, thereby transferring surplus power from the power switching device 34 to the outside. (For example, the system power supply 12).

  On the other hand, if there is no power transmission instruction even after a predetermined time has elapsed, and if the cancel button 80D is operated, a negative determination is made in step 192, and the process proceeds to step 196. In step 196, the management control panel 42 confirms whether or not to execute system diagnosis.

  Maintenance such as system diagnosis is set in the management control panel 42 such that periodic system maintenance is performed every predetermined period. Moreover, in the management control panel 42, each connected electric device such as the refrigerator 18 and the air conditioner 20, each power generation device such as the solar power generation device 24, the wind power generation device 26, and the fuel cell 28, the storage battery 30, and the charge / discharge device 30A. , 32A, the power switching device 34, etc., a regular maintenance time can be set. When each device has a self-diagnosis function, the management control device 42 causes the self-diagnosis function to be executed at a predetermined timing and obtains the result from the device.

  Here, if it is determined that the system diagnosis is to be performed from the preset timing or the operation state of each device, an affirmative determination is made in step 198 and the process proceeds to step 198 to execute a predetermined system diagnosis. When the execution of the system diagnosis is completed, the management control panel 42 stores the diagnosis result as a history and displays it on the display 52A to notify the resident.

  FIG. 13B shows an example of display on the display 52A at this time. On this display screen 82, a message 82A indicating that the diagnosis result is being displayed is displayed. On the display screen 82, a request button 82C is provided for each message 82B, together with a device 82B indicating the maintenance required for inspection and repair, and a message 82B indicating the content of the maintenance.

  Here, as shown in FIGS. 2 and 3, the management control board 42 is connected to the host server 48, and the management control board 42 operates the request button 82 </ b> C on the display screen 82. Notification is made via the host server 48 to the manufacturer of the corresponding device, maintenance company, or the like. Thereby, the troublesomeness that a resident has to find and contact a manufacturer or a maintenance company can be eliminated.

  On the other hand, in FIG. 11, when the storage battery 30 or the vehicle 32 is charged by shifting to step 188, in step 200, the time zone in which charging is performed, that is, the time zone in which surplus power is generated is stored as a history. In the next step 202, it is confirmed from the stored history whether or not there is a time zone in which the storage battery 30 and the vehicle 32 using surplus power are frequently charged (number of times).

  Here, for example, if the battery is charged a predetermined number of times (the number of days determined according to the period) within a preset period (for example, a unit from one week to one month), an affirmative determination is made in step 202. The process proceeds to step 204. In this step 204, when surplus power is generated in the extracted time zone, it is proposed that the charging program is set or changed so as to perform charging using the surplus power.

  FIG. 13C shows an example of the display at this time. On the display screen 84 displayed on the display 52A, there is a message 84A indicating a time zone in which the generated power has a margin and charging is frequently performed, and a message suggesting that the charging is performed in that time zone. 84B is displayed.

  Based on this, the resident installs a predetermined charging program on the management control panel 42 and sets the charging program to be activated during the proposed time zone. As a result, the power management panel 42 automatically charges the storage battery 30 and the vehicle 32 when surplus power is generated during the time period. Thereby, the troublesome charging operation can be eliminated, and the electric power charged in the storage battery 30 and the vehicle 32 can be maintained in a state where it can be supplied to the electrical equipment in the house 10.

  8 and 11, the information notified by the resident is displayed on the display 52A. However, for example, the notification by voice may be performed together, or the display on the display 52A and the notification by voice. Any one of these may be selected and performed. Furthermore, the present invention is not limited to these, and any reporting method can be applied as long as predetermined information can be accurately transmitted to the resident.

  Further, the configuration and control of the present embodiment described above are merely examples, and the present invention is not limited to the above, and various modifications can be made without departing from the gist of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 Housing 12 System power supply 14 Distribution board 24 Solar power generation device 26 Wind power generation device 28 Fuel cell 30 Storage battery 32 Vehicle 34 Power switching device 40 Power management system 42 Management control panel 52A Display

Claims (9)

A plurality of power sources including a natural energy power generation means for generating power using natural energy and a system power supply, and supplying power to the electrical equipment of the building;
Based on the priority set higher than the rank of the system power supply, the natural energy power generation means is higher than the power consumption consumed by the electrical equipment at the present time from the plurality of power sources, Power management means for controlling power to be supplied from the power source having a high priority and stopping the power source having a low priority;
Including power management system.   The power management system according to claim 1, wherein the power management unit includes a notification unit that notifies at least a power source that stops power supply among the plurality of power sources.   The power management system according to claim 2, wherein the notification unit notifies information indicating that the current suppliable power exceeds the power consumption, the priority, and the power source to be stopped. The power source includes a power storage unit that has a lower priority than the natural energy power generation unit and is set higher than the system power source, and is capable of discharging the stored power.
The power management system according to any one of claims 1 to 3.   The power management system according to claim 4, wherein when the surplus power is generated in the power generated by the natural energy power generation unit, the power storage unit is charged. The power source includes non-natural energy power generation means for generating power using non-natural energy, wherein the priority is set lower than the natural energy power generation means and higher than the system power source.
The power management system according to any one of claims 1 to 3.   6. The non-natural energy power generation unit according to claim 4, wherein the power source includes a non-natural energy power generation unit that sets the priority lower than the power storage unit and higher than the grid power source and generates power using non-natural energy. Power management system.   The power management system according to any one of claims 1 to 7, wherein the natural energy generation means includes at least one of a solar power generation means and a wind power generation means. Maintenance means for performing a preset maintenance process on the plurality of power sources and the electrical equipment of the building,
The power management means operates the maintenance means when surplus occurs in the generated power of the natural energy power generation means.
The power management system according to any one of claims 1 to 7.