JP2015162966A - Cogeneration unit, cogeneration system comprising the same, and power energy management apparatus - Google Patents

Cogeneration unit, cogeneration system comprising the same, and power energy management apparatus Download PDF

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JP2015162966A
JP2015162966A JP2014036724A JP2014036724A JP2015162966A JP 2015162966 A JP2015162966 A JP 2015162966A JP 2014036724 A JP2014036724 A JP 2014036724A JP 2014036724 A JP2014036724 A JP 2014036724A JP 2015162966 A JP2015162966 A JP 2015162966A
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unit
power
power generation
control signal
amount
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JP6184888B2 (en
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正徳 矢吹
Masanori Yabuki
正徳 矢吹
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東芝燃料電池システム株式会社
Toshiba Fuel Cell Power Systems Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as enabling technology in buildings sector
    • Y02B90/22Systems characterised by the monitored, controlled or operated end-user elements or equipments
    • Y02B90/222Systems characterised by the monitored, controlled or operated end-user elements or equipments the elements or equipments being or involving energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators involved in the last power distribution stages
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of electrical power generation, transmission or distribution, i.e. smart grids as climate change mitigation technology in the energy generation sector
    • Y02E40/72Systems characterised by the monitoring, control or operation of energy generation units, e.g. distributed generation [DER] or load-side generation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of electrical power generation, transmission or distribution, i.e. smart grids as climate change mitigation technology in the energy generation sector
    • Y02E40/76Computing methods or systems for efficient or low carbon management or operation of electric power systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/10Systems characterised by the monitored, controlled or operated power network elements or equipment
    • Y04S10/12Systems characterised by the monitored, controlled or operated power network elements or equipment the elements or equipment being or involving energy generation units, including distributed generation [DER] or load-side generation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/10Systems characterised by the monitored, controlled or operated power network elements or equipment
    • Y04S10/12Systems characterised by the monitored, controlled or operated power network elements or equipment the elements or equipment being or involving energy generation units, including distributed generation [DER] or load-side generation
    • Y04S10/123Systems characterised by the monitored, controlled or operated power network elements or equipment the elements or equipment being or involving energy generation units, including distributed generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/54Management of operational aspects
    • Y04S10/545Computing methods or systems for efficient or low carbon management or operation of electric power systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Systems supporting the management or operation of end-user stationary applications, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y04S20/10System characterised by the monitored, controlled or operated end-user elements or equipments
    • Y04S20/12System characterised by the monitored, controlled or operated end-user elements or equipments the elements or equipments being or involving energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators involved in the last power distribution stages

Abstract

PROBLEM TO BE SOLVED: To make it possible to suppress reduction in thermal energy utilization efficiency of a cogeneration unit even under management of a power energy management apparatus.SOLUTION: A cogeneration unit 10 according to an embodiment comprises: a power generation amount adjustment apparatus 13 for adjusting a power generation amount of a cogeneration unit main body 12; and a unit control apparatus 30 for designating a power generation amount to be adjusted in the power generation amount adjustment apparatus 13. The unit control apparatus 30 includes a learning control signal generation section 31 for performing demand prediction by learning past power demand 32 and past thermal demand 33 to generate a learning control signal 34 including a power generation designation amount based on the demand prediction. Either of the learning control signal 34 generated by the learning control signal generation section 31 and a management control signal 71 including a power generation designation amount generated by a power energy management apparatus 60 is selected by a signal selection transmission section 35 and transmitted to the power generation amount adjustment apparatus 13.

Description

  Embodiments described herein relate generally to a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus.

  In recent years, global warming has become a big topic and attention has been focused on carbon dioxide emissions, and the spread of cogeneration units with excellent energy savings is accelerating. Examples of small-capacity cogeneration units for home use include fuel cell power generation units that use city gas and LPG as raw fuel, and gas engine units. Of these, fuel cell power generation units are more powerful than gas engine power generation units. It is spreading because it is environmentally friendly. A fuel cell power generation unit is a unit that generates electric power by extracting hydrogen from raw fuel and reacting with oxygen in the air, recovering heat generated at the same time as generating power, and using the recovered heat as hot water supply, It is an energy-saving power generation unit that can achieve high energy efficiency.

  In recent years, the spread of household photovoltaic power generation units has been widespread. The number of cases where so-called W power generation, in which two power generation units of this solar power generation unit and the above-described fuel cell power generation unit are installed in one house, is increasing. In addition to this, storage battery units are beginning to spread for the purpose of preparing for peak cuts that reduce the amount of power consumed during the daytime by storing nighttime power and using it in the daytime, and in the event of a power failure.

  When a plurality of power generation units and storage battery units as described above are installed in one house, these units are power-managed by a power energy management device (HEMS: Home Energy Management System) and integrated in the home. Power energy management is performed.

  In the above-described fuel cell power generation unit as a home cogeneration unit, it has been devised to efficiently operate a fuel cell by predicting power demand and heat demand. This is called “learning control”, and each maker adopts a unique control method and is commercialized.

JP 2002-29887A JP 2001-258293 A JP 2007-306661 A

  However, when these power generation units and storage battery units are installed, there is a problem that energy is wasted unless power management is performed appropriately, resulting in a low energy saving effect. For example, considering a combination including a fuel cell power generation unit that generates thermal energy, the HEMS management device performs so-called “visualization” and power management of the power generation amount of each power generation unit and the power consumption amount at the load. The thermal energy management of the fuel cell power generation unit is not performed. For this reason, it has become difficult to appropriately manage the power of each power generation unit, leading to a decrease in heat energy utilization efficiency, and there has been a problem that the above-described merit of the fuel cell power generation unit can be impaired.

  The problem to be solved by the present invention is to provide a cogeneration unit that can suppress a decrease in thermal energy utilization efficiency of a cogeneration unit even under the control of the power energy management device, a cogeneration system including the cogeneration unit, and a power energy management device. Is to provide.

  The cogeneration unit according to the embodiment is managed by the power energy management device together with the photovoltaic power generation unit or the storage battery unit. This cogeneration unit includes a cogeneration unit main body that generates electric power and heat, a power generation amount adjustment device that adjusts the power generation amount of the cogeneration unit main body, and a unit control that indicates the power generation amount to be adjusted in the power generation amount adjustment device And a device. The unit control device has a learning control signal creation unit that learns a past power demand and a past heat demand and makes a demand prediction and creates a learning control signal including a power generation instruction amount based on the demand prediction. . Either one of the learning control signal created by the learning control signal creation unit and the management control signal including the power generation instruction amount created by the power energy management device is selected by the power generation amount adjusting device to generate power. It is transmitted to the quantity adjusting device.

It is the schematic which shows the cogeneration system in 1st Embodiment. It is the schematic which shows the structure of the fuel cell control apparatus in the cogeneration system of FIG. It is the schematic which shows the cogeneration system in 2nd Embodiment. It is the schematic which shows the cogeneration system in 3rd Embodiment. In 4th Embodiment, it is the schematic which shows the structure of a fuel cell control apparatus. In 5th Embodiment, it is the schematic which shows the structure of a HEMS management apparatus.

  Hereinafter, a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
First, a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the cogeneration system 1 includes a fuel cell power generation unit 10 (cogeneration unit), a solar power generation unit 40, a storage battery unit 50, and a HEMS management device 60 (power energy management device). I have. Among these, the HEMS management device 60 is for power management of the fuel cell power generation unit 10, the solar power generation unit 40, and the storage battery unit 50. First, the fuel cell power generation unit 10 will be described. The fuel cell power generation unit 10 in the present embodiment is power-managed by the HEMS management device 60 together with the solar power generation unit 40 and the storage battery unit 50 as described above.

  The fuel cell power generation unit 10 is supplied with raw fuel (city gas or the like) to generate a hydrogen rich gas, a hydrogen rich gas generated in the reformer 11, and an oxidant gas. And a fuel cell stack 12 (cogeneration unit main body) that is supplied with air containing oxygen and generates electric power and heat. Note that air is supplied to the fuel cell stack 12, but is also supplied to the reformer 11.

  An inverter 13 (power generation amount adjusting device) is connected to the load 100 side of the fuel cell stack 12. The inverter 13 is connected to the load 100 and the commercial power system 110. As a result, the inverter 13 converts DC power generated from the fuel cell stack 12 into AC power and supplies the AC power to the load 100 and the commercial power system 110. In the present embodiment, the inverter 13 is configured to adjust the power generation amount generated from the fuel cell stack 12. That is, the inverter 13 adjusts the amount of power generated from the fuel cell stack 12 and converts it into AC power.

  The power supplied from the inverter 13 is detected by the two power demand sensors 14a and 14b. One power demand sensor 14a is provided in a portion closer to the inverter 13 than a second connection point 62b in a first system line 61a described later, and the other power demand sensor 14b is provided in the first system line 61a. It is provided in a portion between the first connection point 62a and the third connection point 62c. The amount of power detected by these power demand sensors 14a and 14b is stored in a storage unit (not shown) and used for learning control of the fuel cell power generation unit 10 as a power demand 32 described later. The power demand sensors 14a and 14b may be configured as current sensors that measure current, and a current signal may be transmitted to the inverter 13 as a power amount signal, and the inverter 13 may convert the current signal into a power amount signal. .

  On the other hand, the fuel cell power generation unit 10 collects and uses the heat generated and discharged in the fuel cell stack 12. That is, the fuel cell power generation unit 10 includes a first exhaust heat recovery line 22 and a heat utilization unit 20 connected to the first exhaust heat recovery line 22. In the present embodiment, an example in which the heat utilization unit 20 includes a hot water storage tank 21 is shown. In addition, the heat utilization unit 20 is not limited to the case where the hot water storage tank 21 is included, and a specific configuration may be arbitrary.

  The water in the hot water storage tank 21 is heated using the heat generated from the fuel cell stack 12. The first exhaust heat recovery line 22 is provided with an exhaust gas heat exchanger 23, a stack heat exchanger 24, and a circulation pump 25. Among these, the first exhaust heat recovery water circulates through the first exhaust heat recovery line 22 by the circulation pump 25.

  The first exhaust heat recovery water discharged from the hot water storage tank 21 is first supplied to the exhaust gas heat exchanger 23 and heated by the exhaust gas discharged from the reformer 11 and the like. Subsequently, the first exhaust heat recovery water is supplied to the stack heat exchanger 24 and is heated by the heat discharged from the fuel cell stack 12. That is, the stack heat exchanger 24 and the fuel cell stack 12 are connected by the second exhaust heat recovery line 26, and the second exhaust heat recovery water supplied from the stack heat exchanger 24 to the fuel cell stack 12 is Heat is generated by the heat generated in the fuel cell stack 12. The heated second exhaust heat recovery water is returned to the stack heat exchanger 24 to heat the first exhaust heat recovery water flowing through the first exhaust heat recovery line 22.

  Note that the configuration and number of the exhaust heat recovery system and the heat exchanger described above are merely examples, and are not limited to the configuration described above.

  The first exhaust heat recovery water heated by the stack heat exchanger 24 is supplied to the hot water storage tank 21 to heat the water stored in the hot water storage tank 21. Hot water heated to a high temperature in the hot water storage tank 21 is supplied to various places in the home and used as hot water.

  The flow rate of hot water supplied from the hot water storage tank 21 to various locations in the home is detected by a hot water flow rate sensor 27. The detected flow rate of the hot water is stored in a storage unit (not shown) and is used for learning control of the fuel cell power generation unit 10 as a heat demand 33 described later.

  The fuel cell power generation unit 10 further includes a fuel cell control device 30 (unit control device) that controls the inverter 13 so as to indicate the power generation amount to be adjusted in the inverter 13. The fuel cell control device 30 instructs the power generation amount to be adjusted in the inverter 13 on the basis of the power demand 32 and the heat demand 33 described above, and the reformer 11 described above according to the power generation amount. The flow rate of the supplied raw fuel and the flow rate of air supplied to the fuel cell stack 12 are controlled.

  Next, the solar power generation unit 40 will be described.

  The solar power generation unit 40 is connected to the load 100 and the commercial power system 110, and generates power so as to increase the power generation efficiency in accordance with the amount of solar radiation. That is, the solar power generation unit 40 has a solar power generation control device 41, and the solar power generation control device 41 performs maximum power point tracking control to increase the power generation efficiency of the solar power generation unit 40.

  Next, the storage battery unit 50 will be described.

  The storage battery unit 50 is connected to the load 100 and the commercial power system 110, and is charged and discharged according to a charging time and a discharging time set by a user at an operation terminal (not shown) or according to an instruction from the HEMS management device 60. Discharge. That is, the storage battery unit 50 has a storage battery control device 51, and the storage battery control device 51 is configured to charge and discharge electric power.

During discharge, as shown below in (Formula 1) and (Formula 2), the amount of power consumed by the load 100 and the power consumed by the fuel cell power generation unit 10 according to the operating state of the fuel cell power generation unit 10 The amount of discharge power is determined so as to be equal to or less than the sum of the amount or the amount of power to be generated. This is because the fuel cell power generation unit 10 and the storage battery unit 50 are prohibited from causing reverse power flow to the commercial power system 110 by the grid connection regulations. In addition, the power generation amount of the fuel cell power generation unit 10 in (Equation 1) means the power amount obtained by subtracting the power consumption amount of the fuel cell power generation unit 10.
(Formula 1) When the fuel cell power generation unit 10 is in operation (discharge power amount of the storage battery unit 50)
≦ (Power consumption of load 100) − (Power generation of fuel cell power generation unit 10)
(Formula 2) When the fuel cell power generation unit 10 is stopped (discharged electric energy of the storage battery unit 50)
≦ (Power consumption of load 100) + (Power consumption of fuel cell power generation unit 10)

  Next, the HEMS management device 60 will be described.

  The HEMS management device 60 includes the power generation amount of each of the power generation units 10 and 40, the charge power amount or discharge power amount of the storage battery unit 50, the power consumption amount of the load 100, and the power at the connection point (power reception point) with the commercial power system 110. The amount is monitored.

  More specifically, a first system line 61 a extending from the inverter 13 of the fuel cell power generation unit 10 is connected to the commercial power system 110. The first power sensor 63a is provided in the first system line 61a. The first power sensor 63a detects the amount of power supplied from the fuel cell power generation unit 10 and manages the first power amount signal 64a with HEMS. To device 60. The first power sensor 63a is configured as a current sensor that measures current, and the current signal is transmitted to the HEMS management device 60 as the first power amount signal 64a. The HEMS management device 60 converts the current signal into a power amount signal. You may make it do. Or it is also possible to transmit the value measured by the power demand sensor 14a installed in the fuel cell power generation unit 10 to the HEMS management device 60 via communication and use it.

  The second system line 61b extending from the solar power generation unit 40 is connected to a midway position (first connection point 62a) of the first system line 61a, and the second power sensor 63b is provided on the second system line 61b. It has been. The second power sensor 63 b detects the amount of power supplied from the solar power generation unit 40 and transmits a second power amount signal 64 b to the HEMS management device 60. The second power sensor 63b is configured as a current sensor that measures current, and the current signal is transmitted to the HEMS management device 60 as the second power amount signal 64b, and the HEMS management device 60 converts the current signal into a power amount signal. You may make it do. Alternatively, a value measured by a power demand sensor (not shown) installed in the solar power generation unit 40 can be transmitted to the HEMS management device 60 via communication and used.

  The third system line 61c extending from the storage battery unit 50 is connected to a middle position (second connection point 62b) on the fuel cell power generation unit 10 side from the first connection point 62a in the first system line 61a. A third power sensor 63c is provided in the three system lines 61c. The third power sensor 63 c detects the charge power amount or the discharge power amount of the storage battery unit 50 and transmits a third power amount signal 64 c to the HEMS management device 60. The third power sensor 63c is configured as a current sensor that measures current, and the current signal is transmitted to the HEMS management device 60 as the third power amount signal 64c. The HEMS management device 60 converts the current signal into a power amount signal. You may make it do. Alternatively, a value measured by a power demand sensor (not shown) installed in the storage battery unit 50 can be transmitted to the HEMS management device 60 via communication and used.

  A fourth system line 61d extends and is connected to the load 100 from a midway position (third connection point 62c) between the first connection point 62a and the second connection point 62b in the first system line 61a. A fourth power sensor 63d is provided in the fourth system line 61d, and the fourth power sensor 63d detects the power consumption amount of the load 100 and transmits a fourth power amount signal 64d to the HEMS management device 60. The fourth power sensor 63d is configured as a current sensor that measures current, and the current signal is transmitted to the HEMS management device 60 as the fourth power amount signal 64d, and the HEMS management device 60 converts the current signal into a power amount signal. You may make it do.

  A fifth power sensor 63e is provided in a portion of the first system line 61a closer to the commercial power system 110 than the first connection point 62a. The fifth power sensor 63e detects the amount of power at a power reception point with the commercial power system 110 and transmits a fifth power amount signal 64e to the HEMS management device 60. The fifth power sensor 63e is configured as a current sensor that measures current, and the current signal is transmitted to the HEMS management device 60 as the fifth power amount signal 64e. The HEMS management device 60 converts the current signal into a power amount signal. You may make it do.

  Thus, the electric energy detected by each electric power sensor 63a-63e is transmitted to the HEMS management apparatus 60 as electric energy signal 64a-64e, and the HEMS management apparatus 60 monitors each electric energy on the display which is not shown in figure. The so-called “visualization”.

  On the other hand, the HEMS management device 60 controls the operation of each of the power generation units 10 and 40 and the storage battery unit 50 while managing each power. More specifically, the HEMS management device 60 transmits a first management control signal 71 (management control signal) to the fuel cell control device 30 of the fuel cell power generation unit 10 to instruct the operation and stop of the fuel cell power generation unit 10. And the power generation amount to be adjusted in the inverter 13 described above. Moreover, the HEMS management apparatus 60 transmits the 2nd management control signal 72 for performing an electric power generation stop instruction | indication to the solar power generation control apparatus 41, and charge, a discharge instruction | indication, and charge electric energy or A third management control signal 73 for instructing the amount of discharge power is transmitted. Here, each of these management control signals 71 to 73 is created by the HEMS management device 60 in order to improve the overall power energy utilization efficiency in the fuel cell power generation unit 10, the solar power generation unit 40, and the storage battery unit 50. Signal.

  Further, the HEMS management device 60 has a reverse power flow preventing function for preventing the reverse flow of the fuel cell power generation unit 10 and the storage battery unit 50 described above. More specifically, a reverse power flow prevention sensor 65 is provided in a portion between the first connection point 62a and the third connection point 62c in the first system line 61a. Based on the electric power detected by the tidal current prevention sensor 65, it is determined whether or not there is a possibility that the fuel cell power generation unit 10 and the storage battery unit 50 may reversely flow. When the HEMS management device 60 determines that there is a possibility of reverse power flow, the HEMS management device 60 issues at least one of an instruction to stop the operation of the fuel cell power generation unit 10 and an instruction to stop the discharge of the storage battery unit 50. When an instruction to stop the operation of the fuel cell power generation unit 10 is given, the first management control signal 71 is transmitted to the fuel cell control device 30, and when an instruction to stop the discharge of the storage battery unit 50 is given, the storage battery control device 51. The third management control signal 73 is transmitted. Here, instead of the reverse power flow preventing sensor 65, the power demand sensor 14b of the fuel cell power generation unit 10 or the power demand sensor (not shown) of the storage battery unit 50 may be used.

  In the present embodiment, the third connection point 62c to which the load 100 is connected is provided on the system 110 side from the second connection point 62b to which the storage battery unit 50 is connected. However, the present invention is not limited to this, and both the second connection point 62b and the third connection point 62c are opposite to the system 110 from the power demand sensor 14b and the reverse power flow prevention sensor 65 (the fuel cell power generation unit 10). The third connection point 62c may be provided on the opposite side of the system 110 from the second connection point 62b.

  In the cogeneration system 1 configured as described above, the fuel cell control device 30 of the fuel cell power generation unit 10 is configured as follows.

  As shown in FIG. 2, the fuel cell control device 30 learns the power demand 32 and the heat demand 33 and creates a learning control signal 34 including a power generation instruction amount, and this learning control signal 31. 34 and the signal selection transmission part 35 which selects any one signal of the 1st management control signal 71 transmitted from the HEMS management apparatus 60.

  Among these, the learning control signal creation unit 31 learns the past power demand 32 and the past heat demand 33 stored in the storage unit described above, and performs future demand prediction, and based on this demand prediction, the inverter 13 The instructed power generation instruction amount is calculated, and a learning control signal 34 including the calculated power generation instruction amount is created. The power generation instruction amount included in the created learning control signal 34 is calculated so that the sum of electric power energy and heat energy is the most energy-saving for the demand prediction. Then, the learning control signal creation unit 31 creates a learning control signal 34 including the calculated power generation instruction amount, and transmits the learning control signal 34 to the signal selection transmission unit 35.

  A first management control signal 71 is transmitted from the HEMS management device 60 to the signal selection transmission unit 35 together with the learning control signal 34 created by the learning control signal creation unit 31. As described above, since the first management control signal 71 is generated by the HEMS management device 60, the effective use of thermal energy in the fuel cell power generation unit 10 is not considered.

  Then, the signal selection / transmission unit 35 selects one of the learning control signal 34 and the first management control signal 71 described above and transmits the selected signal to the inverter 13. The inverter 13 adjusts the power generation amount of the fuel cell stack 12 based on the received signal. Specifically, when the signal selection transmission unit 35 selects the learning control signal 34 and transmits it to the inverter 13, the fuel cell stack 12 performs an operation giving priority to thermal energy (thermal energy priority mode), and fuel The operation of improving the energy utilization efficiency of the fuel cell power generation unit 10 can be performed using the heat energy and power energy of the battery power generation unit 10. On the other hand, when the signal selection transmission unit 35 selects the first management control signal 71 and transmits it to the inverter 13, the fuel cell stack 12 performs an operation giving priority to power energy (power energy priority mode), and the fuel cell. The operation | movement which improves the utilization efficiency of the total electric power energy in the electric power generation unit 10, the solar power generation unit 40, and the storage battery unit 50 can be performed.

  Incidentally, as shown in FIG. 1, the HEMS management device 60 includes a selection signal setting unit 81 that sets which signal should be selected in the signal selection transmission unit 35 of the fuel cell control device 30. The selection signal setting unit 81 can be configured such that the user selects and inputs a signal to be selected, that is, a thermal energy priority mode or a power energy priority mode. For example, when the user sets and inputs the thermal energy priority mode to the selection signal setting unit 81, the signal selection transmission unit 35 can select the learning control signal 34 and perform the operation in the thermal energy priority mode. On the other hand, when the user sets and inputs the power energy priority mode to the selection signal setting unit 81, the signal selection transmission unit 35 can select the first management control signal 71 and perform the operation in the power energy priority mode. .

  For example, when the first management control signal 71 is received from the HEMS management device 60, the signal selection transmission unit 35 selects the first management control signal 71 and does not receive the first management control signal 71. In some cases, the learning control signal 34 may be selected. That is, the HEMS management device 60 stops the transmission of the first management control signal 71 to the signal selection transmission unit 35 when the thermal energy priority mode is set in the selection signal setting unit 81. Thus, the signal selection transmission unit 35 selects the learning control signal 34 and transmits it to the inverter 13. On the other hand, the HEMS management device 60 transmits the first management control signal 71 to the signal selection transmission unit 35 when the selection mode setting unit 81 sets the power energy priority mode. As a result, the signal selection transmission unit 35 selects the first management control signal 71 and transmits it to the inverter 13. In this way, the HEMS management device 60 can control signal selection in the signal selection transmission unit 35. Note that the signal selection method in the signal selection transmission unit 35 is not limited to the above. For example, the learning control signal 34 and the first management control signal 71 are transmitted to the signal selection transmission unit 35, and the signal selection transmission unit 35 transmits the learning control signal 34 transmitted in response to a command from the HEMS management device 60. And the first management control signal 71 can be selected.

  Further, the HEMS management device 60 includes a mode setting unit 82 that sets one of an economic mode (first mode) and an environmental mode (second mode). Here, the economic mode is a mode for selling the electric power generated by the photovoltaic power generation unit 40 at a higher unit price and providing economic benefits to the user. The environmental mode is a mode for reducing the amount of purchased power from the commercial power system 110 and maximally using relatively clean power generated by the fuel cell power generation unit 10 or the solar power generation unit 40. . These economical mode and environmental mode can be modes in which operation is performed in the power energy priority mode. The mode selection unit 82 can be configured such that one of the modes is set and input by the user, and the input mode is set.

  When the economy mode is set in the mode setting unit 82, the HEMS management device 60 creates a first management control signal 71 that sets the power generation instruction amount to zero (0), and the signal selection transmission unit of the fuel cell control device 30. 35. As a result, the first management control signal 71 is selected by the signal selection / transmission unit 35 and transmitted to the inverter 13, the power generation amount of the fuel cell stack 12 becomes zero, and the operation of the fuel cell power generation unit 10 is stopped.

  Moreover, when economic mode is selected, the HEMS management apparatus 60 transmits the 3rd management control signal 73 to the storage battery control apparatus 51 of the storage battery unit 50 so that the driving | operation of the storage battery unit 50 may be stopped. In this way, the operation of the fuel cell power generation unit 10 and the storage battery unit 50 can be stopped. In this case, the unit price of power generated by the solar power generation unit 40 can be increased. This is a system that reduces the purchase price of the electric power generated by the solar power generation unit 40 when the power generation is performed in another power generation unit such as the fuel cell power generation unit 10 simultaneously with the solar power generation unit 40. By becoming.

  On the other hand, when the environmental mode is set in the mode setting unit 82, the HEMS management device 60 creates the first management control signal 71 for increasing the power generation instruction amount of the fuel cell stack 12, and selects the signal of the fuel cell control unit It transmits to the transmission part 35. Thus, the first management control signal 71 is set by the signal selection / transmission unit 35 and transmitted to the inverter 13, and the amount of power generated from the fuel cell stack 12 increases. In this way, the amount of power generated by the fuel cell power generation unit 10 can be increased.

  When the environmental mode is set, the HEMS management device 60 transmits the third management control signal 73 to the storage battery control device 51 of the storage battery unit 50 so that the storage battery unit 50 performs the charging operation. In this way, when the storage battery unit 50 can be charged with a surplus portion of the power generated by the fuel cell power generation unit 10 and the solar power generation unit 40, and when the power consumption in the load 100 is relatively increased, By discharging from the storage battery unit 50, the increase in power consumption can be compensated. For this reason, the purchased electric energy from the commercial power system 110 can be reduced.

  Next, the operation of the present embodiment having such a configuration will be described.

  When the thermal energy priority mode is set in the selection signal setting unit 81 of the HEMS management device 60, the HEMS management device 60 stops transmitting the first management control signal 71 to the signal selection transmission unit 35 of the fuel cell control device 30. To do. Thus, the signal selection transmission unit 35 selects the learning control signal 34 transmitted from the learning control signal creation unit 31 and transmits it to the inverter 13. As a result, the fuel cell power generation unit 10 generates power with the amount of power generated in the thermal energy priority mode, and uses the heat energy and power energy of the fuel cell power generation unit 10 to improve the energy utilization efficiency of the fuel cell power generation unit 10. Can be achieved.

  When the power energy priority mode is set in the selection signal setting unit 81 of the HEMS management device 60, the HEMS management device 60 transmits the first management control signal 71 to the signal selection transmission unit 35 of the fuel cell control device 30. As a result, the signal selection / transmission unit 35 switches the signal to be selected from the learning control signal 34 to the first management control signal 71 and transmits the first management control signal 71 to the inverter 13. Thus, the fuel cell stack 12 generates power with the amount of power generation in the power energy priority mode, and aims to improve the overall power energy utilization efficiency in the fuel cell power generation unit 10, the solar power generation unit 40, and the storage battery unit 50. Can do.

  In the power energy priority mode, either the economic mode or the environmental mode is further set in the mode setting unit 82.

  That is, when the economic mode is set in the mode setting unit 82 of the HEMS management device 60, the HEMS management device 60 creates the first management control signal 71 that sets the power generation instruction amount to zero and sends it to the signal selection transmission unit 35. Send. As a result, the power generation amount of the fuel cell stack 12 becomes zero, and the operation of the fuel cell power generation unit 10 is stopped. In this case, the HEMS management device 60 transmits the third management control signal 73 to the storage battery control device 51 to stop the operation of the storage battery unit 50. At this time, the storage battery unit 50 is neither charged nor discharged. Thus, the fuel cell power generation unit 10 and the storage battery unit 50 are stopped, and the unit price of power generated by the solar power generation unit 40 can be increased. In this case, the electric power generated by the solar power generation unit 40 is consumed by the load 100, and the surplus can be supplied to the commercial power system 110 and sold.

  On the other hand, when the environmental mode is set in the mode setting unit 82 of the HEMS management device 60, the HEMS management device 60 generates the first management control signal 71 that increases the power generation instruction amount and transmits the first management control signal 71 to the signal selection transmission unit 35. To do. As a result, the amount of power generated by the fuel cell stack 12 increases. In this case, the HEMS management device 60 transmits the storage battery management control signal 73 to the storage battery control device 51 to cause the storage battery unit 50 to perform the charging operation. Thus, the surplus portion of the electric power generated by the fuel cell power generation unit 10 and the solar power generation unit 40 can be charged to the storage battery unit 50, and the amount of power consumption in the load 100 is relatively increased. However, the increase in power consumption can be compensated by discharging from the storage battery unit 50. For this reason, the purchased electric energy from the commercial power system 110 can be reduced.

  Incidentally, in the power energy priority mode, the fuel cell power generation unit 10 operates based on the first management control signal 71 created by the HEMS management device 60. Here, the HEMS control device 60 does not manage the thermal energy of the fuel cell power generation unit 10 as described above. For this reason, the power generation instruction amount indicated by the first management control signal 71 does not consider the effective use of the thermal energy of the fuel cell power generation unit 10. As a result, while the operation in the power energy priority mode is performed, the hot water created in the hot water storage tank 21 may become full or empty.

  For example, the case where the hot water becomes full due to the selection of the environmental mode is considered. In this case, the heat generated in the fuel cell power generation unit 10 is recovered through the exhaust heat recovery lines 22 and 26. May become difficult, and heat may remain in the fuel cell stack 12. In this case, the internal temperature of the fuel cell stack 12 increases, and the amount of power generated by the fuel cell stack 12 decreases.

  Therefore, the HEMS management device 60 determines the fuel cell stack 12 with respect to the power generation instruction amount indicated by the first management control signal 71 based on the amount of power supplied from the fuel cell power generation unit 10 transmitted from the first power sensor 63a. It is determined whether or not the amount of power generation has decreased. When it is determined that the power generation amount has decreased, it can be assumed that the hot water in the hot water storage tank 21 is full. Then, the HEMS management device 60 stops transmitting the first management control signal 71. Accordingly, the signal selection / transmission unit 35 of the fuel cell control device 30 switches the signal to be selected from the first management control signal 71 to the learning control signal 34 and transmits the learning control signal 34 to the inverter 13. As a result, the fuel cell stack 12 can generate power with the power generation amount in the thermal energy priority mode. As a result, management of thermal energy can be started, and the fuel cell power generation unit 10 can perform an appropriate operation by learning control based on the power demand 32 and the heat demand 33.

  On the other hand, there is a case where the hot water is emptied by selecting the economic mode. In this case, the user sets the thermal energy priority mode in the selection signal setting unit 81 of the HEMS management device 60 as necessary. By inputting the setting, the fuel cell stack 12 can generate power with the power generation amount in the thermal energy priority mode.

  By the way, it is desirable that it is possible to avoid the possibility that the hot water in the hot water storage tank 21 becomes full or empty by the operation in the power energy priority mode. For this reason, the learning control signal creation unit 31 learns based on the past power demand 32 and the past heat demand 33 while the past first management control signal 71 is selected in the signal selection transmission unit 35. It is preferable that the next first management control signal 71 is selected after the generated learning control signal 34 is selected in the signal selection / transmission unit 35. In this case, although the amount of power generated by the fuel cell stack 12 is increased by the operation in the environmental mode and the amount of hot water in the hot water storage tank 21 is increased, the amount of hot water used is small, so It is possible to adjust the power generation amount of the fuel cell stack 12 by learning that there is excess hot water inside. Further, the hot water in the hot water storage tank 21 is used by using the hot water even though the power generation in the fuel cell stack 12 stops and the amount of the hot water in the hot water storage tank 21 does not increase by the operation in the economic mode. Can be adjusted to adjust the power generation amount of the fuel cell stack 12.

  That is, it is preferable that the power generation amount of the fuel cell stack 12 is adjusted so that the amount of hot water in the hot water storage tank 21 is reduced before the operation in the environmental mode is started. As a result, when the environmental mode operation is performed, it is possible to earn time until the hot water in the hot water storage tank 21 becomes full, and it is possible to increase the operable time of the environmental mode.

  On the other hand, it is preferable to adjust the power generation amount of the fuel cell stack 12 so as to increase the amount of hot water in the hot water storage tank 21 before the operation in the economic mode is started. As a result, by performing the operation in the economic mode, it is possible to earn time until the hot water in the hot water storage tank 21 becomes empty, and it is possible to increase the operable time in the economic mode.

  As described above, according to the present embodiment, the signal transmitted to the inverter 13 that adjusts the power generation amount of the fuel cell stack 12 is a demand forecast obtained by learning the past power demand 32 and the heat demand 33. Based on the learning control signal 34 (corresponding to the heat energy priority mode) including the power generation instruction amount based on the first management control signal 71 (corresponding to the power energy priority mode) including the power generation instruction amount created by the HEMS management device 60. be able to. As a result, even under the control of the HEMS management device 60, the fuel cell power generation unit 10 can be operated by adjusting the power generation amount based on the power generation instruction amount of the learning control signal 34 as the thermal energy priority mode. The use efficiency of the heat energy of the battery power generation unit 10 can be improved, and the decrease in the use efficiency of the heat energy can be suppressed.

  Further, according to the present embodiment, as described above, the thermal energy priority mode and the power energy priority mode can be selected. As a result, the operation mode of the fuel cell power generation unit 10 can be changed according to the user's wishes, improving convenience and increasing user satisfaction. Furthermore, according to the present embodiment, the economic mode and the environmental mode can be selected while the power energy priority mode is selected. As a result, the operation mode of the fuel cell power generation unit 10 can be set more finely according to the user's wishes, the convenience can be further improved, and the user's satisfaction can be further increased.

(Second Embodiment)
Next, a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus according to the second embodiment of the present invention will be described with reference to FIG.

  The second embodiment shown in FIG. 3 is mainly different in that the fuel cell management control signal is created based on the predicted amount of solar radiation obtained from the Internet. Other configurations are the same as those in FIGS. This is substantially the same as the first embodiment shown in FIG. In FIG. 3, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the cogeneration system 1 further includes a host control device 130 that can receive, from the Internet 120, the predicted amount of solar radiation in the area where the cogeneration system 1 is installed. The host control device 130 transmits the received predicted solar radiation amount as the predicted solar radiation amount signal 131 to the HEMS management device 60. The HEMS management device 60 creates the first management control signal 71 based on the received predicted solar radiation amount.

  More specifically, the HEMS management device 60 predicts the amount of power generated by the solar power generation unit 40 based on the predicted amount of solar radiation.

  When the predicted power generation amount is larger than the predetermined amount, the HEMS management device 60 creates a first management control signal 71 that sets the nighttime power generation instruction amount to zero. As a result, the first management control signal 71 is selected by the signal selection / transmission unit 35 and transmitted to the inverter 13, and the power generation amount of the fuel cell stack 12 at night becomes zero. In this way, the operation of the fuel cell power generation unit 10 can be stopped at night, and the amount of hot water in the hot water storage tank 21 can be reduced. In this case, in the daytime, it is possible to earn time until the hot water in the hot water storage tank 21 becomes full due to the operation of the fuel cell power generation unit 10. That is, the operable time of the fuel cell power generation unit 10 can be increased. As a result, the power supplied from the fuel cell power generation unit 10 is consumed by the load 100 (push-up effect). The amount of power sold to the commercial power system 110 can be increased.

  Even when the operation of the fuel cell power generation unit 10 is performed as described above, if the power supplied from the solar power generation unit 40 is consumed in the load 100, the HEMS management device 60 may store the storage battery unit. The third management control signal 73 is transmitted to the storage battery control device 51 so that the discharge operation is performed at 50 and the amount of discharge power is increased. As a result, the amount of power consumed by the load 100 is covered by the amount of power discharged from the storage battery unit 50. As a result, the amount of power sold to the commercial power system 110 among the amount of power supplied from the solar power generation unit 40 is further increased. It can be further increased. In addition, there is a case where the operation of the fuel cell power generation unit 10 is continued, the hot water in the hot water storage tank 21 becomes full, and the power generation amount of the fuel cell power generation unit 10 decreases or the operation stops. It is done. However, even in this case, it is possible to increase the amount of electric power sold from the solar power generation unit 40 to the commercial power system 110 by increasing the amount of electric power discharged from the storage battery unit 50.

  On the other hand, if the predicted power generation amount in the solar power generation unit 40 is smaller than the predetermined amount, the HEMS management device 60 stops transmitting the first management control signal 71 to the signal selection transmission unit 35. Thus, the signal selection transmission unit 35 selects the learning control signal 34 and transmits it to the inverter 13. As a result, the fuel cell power generation unit 10 generates power with the amount of power generated in the thermal energy priority mode, and uses the heat energy and power energy of the fuel cell power generation unit 10 to improve the energy utilization efficiency of the fuel cell power generation unit 10. Can be achieved.

  Thus, according to the present embodiment, the first management control signal 71 is created based on the predicted solar radiation received from the Internet 120. Thus, the operation and stop of each power generation unit 10, 40 can be switched according to the predicted amount of solar radiation, and the total use of power energy in the fuel cell power generation unit 10, the solar power generation unit 40 and the storage battery unit 50. Efficiency can be further improved.

(Third embodiment)
Next, a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus according to a third embodiment of the present invention will be described with reference to FIG.

  The third embodiment shown in FIG. 4 is mainly different in that the reverse flow prevention function is canceled based on the reverse flow permission command obtained from the Internet, and other configurations are shown in FIGS. This is substantially the same as the first embodiment shown. In FIG. 4, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the cogeneration system 1 further includes a host controller 130 capable of receiving from the Internet 120 a reverse flow permission command that can be issued when there is a concern about power shortage in the commercial power system 110. . The host control device 130 transmits the received reverse flow permission command to the HEMS management device 60 as the reverse flow permission command signal 132. The HEMS management device 60 cancels the reverse flow prevention function based on the received reverse flow permission command.

  In other words, as described above, when the HEMS management device 60 determines that there is a possibility that the storage battery unit 50 may reversely flow based on the amount of power detected by the reverse flow prevention sensor 65, the reverse flow prevention function To instruct at least one of an instruction to stop the operation of the fuel cell power generation unit 10 and an instruction to stop the discharge of the storage battery unit 50. The reverse power flow preventing function is possible in both the thermal energy priority mode and the power energy priority mode.

  However, when the HEMS management device 60 receives the reverse flow permission command, it does not relate to the amount of power detected by the reverse flow prevention sensor 65 and does not give an instruction to stop the operation of the fuel cell power generation unit 10. In addition, the storage battery unit 50 is not instructed to stop discharging. In this way, the reverse flow prevention function of the HEMS management device 60 is canceled, and the generated power of the fuel cell power generation unit 10 and the discharge power of the storage battery unit 50 can be supplied to the commercial power system 110 (reverse flow). And can contribute to the stabilization of the commercial power system 110.

  When canceling the reverse power flow preventing function, the fuel cell power generation unit 10 is preferably operated in the power energy priority mode, for example. In this case, in the fuel cell power generation unit 10, since the use of electric power is prioritized over the use of thermal energy, the amount of electric power supplied to the commercial power system 110 can be increased.

  Thus, according to the present embodiment, the reverse flow prevention function of the HEMS management device 60 is canceled based on the reverse flow permission command received from the Internet 120. As a result, the generated power of the fuel cell power generation unit 10 and the discharged power of the storage battery unit 50 can be supplied to the commercial power system 110, which can contribute to the stabilization of the commercial power system 110.

  4 may be configured to receive the predicted amount of solar radiation obtained from the Internet 120, like the host controller 130 shown in FIG. In this case, it is preferable that the HEMS management device 60 creates the first management control signal 71 based on the predicted amount of solar radiation.

(Fourth embodiment)
Next, a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus according to a fourth embodiment of the present invention will be described with reference to FIG.

  The fourth embodiment shown in FIG. 5 is mainly different in that the HEMS management device is built in the fuel cell control device, and the other configurations are the same as those in the first embodiment shown in FIGS. It is almost the same as the form. In FIG. 5, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the HEMS management device 60 is built in the fuel cell control device 30. In this case, the HEMS management device 60 may be built in the fuel cell control device 30 in hardware. Alternatively, it may be built in software. In this case, a program capable of executing the function of the HEMS management device 60 is provided in the fuel cell control device 30 as an arithmetic processing unit.

  Thus, according to this Embodiment, the installation space of the HEMS management apparatus 60 can be abbreviate | omitted, and the installation space of the whole cogeneration system 1 can be reduced.

(Fifth embodiment)
Next, a cogeneration unit, a cogeneration system including the cogeneration unit, and a power energy management apparatus according to a fifth embodiment of the present invention will be described with reference to FIG.

  The fifth embodiment shown in FIG. 6 is mainly different in that a learning control signal creation unit and a signal selection / transmission unit are built in the HEMS management apparatus. Other configurations are the same as those in FIGS. This is substantially the same as the first embodiment shown in FIG. In FIG. 6, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the HEMS management device 60 includes a HEMS management device body 66 including various functions of the HEMS management device 60 itself, a learning control signal creation unit 31, and a signal selection transmission unit 35. ing. That is, the learning control signal creation unit 31 and the signal selection transmission unit 35 are built in the HEMS management device 60. The learning control signal creation unit 31 and the signal selection transmission unit 35 are preferably built in the HEMS management device 60 so as to be programmed in software.

  The power demand 32 and the heat demand 33 are transmitted to the learning control signal creation unit 31 built in the HEMS management device 60. The first management control signal 71 created in the HEMS management apparatus body 66 is transmitted to the built-in signal selection / transmission unit 35.

  The signal selected by the signal selection transmission unit 35 is transmitted from the signal selection transmission unit 35 to the inverter 13 of the fuel cell power generation unit 10. At this time, the selected signal may be transmitted to the inverter 13 via the fuel cell control device 30 of the fuel cell power generation unit 10.

  As described above, according to the present embodiment, the learning control signal creation unit 31 and the signal selection transmission unit 35 can be built in the HEMS management device 60. Therefore, programming of the learning control signal creation unit 31 and the signal selection transmission unit 35 in the fuel cell control device 30 of the fuel cell power generation unit 10 can be omitted, and the cost of the fuel cell power generation unit 10 can be reduced. Can be achieved.

  According to the present embodiment described above, it is possible to suppress a decrease in the efficiency of heat energy utilization of the cogeneration unit even under the management of the power energy management device.

  Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Cogeneration system 10 Fuel cell power generation unit 12 Fuel cell stack 13 Inverter 30 Fuel cell control apparatus 31 Learning control signal preparation part 32 Electric power demand 33 Heat demand 34 Learning control signal 35 Signal selection transmission part 40 Photovoltaic power generation unit 50 Storage battery unit 60 HEMS management device 71 first management control signal 81 selection signal setting unit 120 Internet 130 host control device

Claims (12)

  1. A cogeneration unit that is managed by a power energy management device together with a photovoltaic power generation unit or a storage battery unit,
    A cogeneration unit that generates power and heat;
    A power generation amount adjusting device for adjusting the power generation amount of the cogeneration unit main body;
    A unit control device that indicates a power generation amount to be adjusted in the power generation amount adjustment device,
    The unit controller is
    A learning control signal creating unit that learns a past power demand and a past heat demand, performs a demand prediction, and creates a learning control signal including a power generation instruction amount based on the demand prediction;
    The power generation amount adjustment is performed by selecting one of the learning control signal created by the learning control signal creation unit and the management control signal including the power generation instruction amount created by the power energy management device. A cogeneration unit comprising: a signal selection transmission unit that transmits to the apparatus.
  2. The cogeneration unit according to claim 1;
    The photovoltaic unit or the storage battery unit;
    A cogeneration system comprising: the cogeneration unit; and the power energy management device that manages power of the photovoltaic power generation unit or the storage battery unit.
  3. The cogeneration system includes the solar power generation unit,
    The power energy management device includes a mode setting unit that sets one of a first mode and a second mode,
    When the first mode is set in the mode setting unit, the power energy management device creates the management control signal that sets the power generation instruction amount to zero,
    3. The cogeneration system according to claim 2, wherein, when the second mode is set in the mode setting unit, the power energy management device creates the management control signal for increasing a power generation instruction amount. 4.
  4. The cogeneration system further comprises the storage battery unit,
    The cogeneration system according to claim 3, wherein when the first mode is set in the mode setting unit, the power energy management device stops the operation of the storage battery unit.
  5. The cogeneration system further comprises the storage battery unit,
    The cogeneration system according to claim 3, wherein when the second mode is set in the mode setting unit, the power energy management device causes the storage battery unit to perform a charging operation.
  6.   The learning control signal creation unit is configured to perform the learning control based on the past power demand and the past heat demand while the past management control signal is selected in the signal selection transmission unit of the unit control device. The signal is generated and the next management control signal is selected after the created learning control signal is selected in the signal selection / transmission unit. Cogeneration system.
  7. The cogeneration system further includes a host controller capable of receiving the predicted solar radiation from the Internet,
    The cogeneration system according to any one of claims 2 to 6, wherein the power energy management device creates the management control signal based on the predicted amount of solar radiation received by the host controller.
  8.   When the predicted amount of solar radiation is greater than a predetermined amount, the power energy management device creates the management control signal with a power generation instruction amount of zero, and when the predicted amount of solar radiation is smaller than the predetermined amount, The cogeneration system according to claim 7, wherein the signal selection transmission unit selects the learning control signal.
  9. The cogeneration system is
    The storage battery unit;
    A host controller capable of receiving a reverse flow permission command from the Internet, and
    The power energy management device has a reverse power flow preventing function for preventing a reverse power flow of the cogeneration unit and the storage battery unit,
    The cogeneration system according to claim 2, wherein the power energy management device cancels the reverse flow prevention function when the host controller receives a reverse flow permission command.
  10.   The cogeneration system according to any one of claims 2 to 9, wherein the power energy management device is built in the unit control device.
  11.   The said power energy management apparatus has a selection signal setting part which sets which signal should be selected in the said signal selection transmission part of the said unit control apparatus, The Claim 1 thru | or 10 characterized by the above-mentioned. A cogeneration system according to any one of the above.
  12. A cogeneration unit that generates electric power and heat, and a power generation amount adjusting device that adjusts the power generation amount of the cogeneration unit main body, and manages the power together with the photovoltaic power generation unit or the storage battery unit, A power energy management device that indicates a power generation amount to be adjusted in a power generation amount adjustment device,
    A learning control signal creating unit that learns a past power demand and a past heat demand, performs a demand prediction, and creates a learning control signal including a power generation instruction amount based on the demand prediction;
    The power generation amount adjustment is performed by selecting one of the learning control signal created by the learning control signal creation unit and the management control signal including the power generation instruction amount created by the power energy management device. A power energy management apparatus comprising: a signal selection transmission unit that transmits to the apparatus.
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