WO2019053824A1 - Appareil de réglage de puissance pour centrale solaire, système de production d'énergie et procédé de réglage de puissance pour centrale solaire - Google Patents

Appareil de réglage de puissance pour centrale solaire, système de production d'énergie et procédé de réglage de puissance pour centrale solaire Download PDF

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Publication number
WO2019053824A1
WO2019053824A1 PCT/JP2017/033099 JP2017033099W WO2019053824A1 WO 2019053824 A1 WO2019053824 A1 WO 2019053824A1 JP 2017033099 W JP2017033099 W JP 2017033099W WO 2019053824 A1 WO2019053824 A1 WO 2019053824A1
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Prior art keywords
power
storage battery
conditioner
power generation
solar
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PCT/JP2017/033099
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English (en)
Japanese (ja)
Inventor
祐平 山本
輝 王
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祐平 山本
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Priority to PCT/JP2017/033099 priority Critical patent/WO2019053824A1/fr
Priority to JP2019520914A priority patent/JPWO2019053824A1/ja
Publication of WO2019053824A1 publication Critical patent/WO2019053824A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the present disclosure relates to a power conditioning device for a solar power plant, a power generation system, and a power conditioning method for a solar power plant.
  • the power transmission control device distributes the generated power of the solar power generation device to generate power corresponding to the specified power. Power is transmitted to the power company via the power transmission network, and at the same time, surplus power exceeding specified power is stored in the storage battery. Also, for example, in the power supply system described in Patent Document 1, when the generated power of the solar power generation device falls below the prescribed power, the power transmission control device combines the generated power of the solar power generation device and the power from the storage battery. Supply electricity to the power company through the transmission grid. As described above, in the power supply system described in Patent Document 1, since the power transmission control device performs distribution and combination of power, the configuration of the power transmission control device tends to be complicated.
  • At least one embodiment of the present invention provides a power conditioning device for a solar power plant, a power generation system, and a power conditioning method for a solar power plant, which can effectively use surplus power with a simple circuit configuration. With the goal.
  • a power conditioner for a solar power plant according to at least one embodiment of the present invention, A storage battery, An input terminal provided corresponding to the power conditioner and connected to each of a plurality of power generation units including one or more solar battery cells, a first output terminal connected to the power conditioner, and the storage battery
  • a switcher including a plurality of switch elements having a second output terminal connected to the The switcher is configured to be able to switch the connection destination of each of the power generation units to either the power conditioner or the storage battery by the operation of each of the switch elements.
  • connection destination of each power generation unit can be switched by the operation of the switch element of the switcher, switching of the power supply destination generated by each power generation unit or power generation by each power generation unit
  • the distributed power can be realized by a simple circuit configuration. Therefore, by operating the switch elements of the switcher, for example, part of the power generated by each power generation unit can be supplied to the power conditioner, and the surplus can be stored in the storage battery. As a result, since it is not necessary to use a circuit for performing distribution and combination of power which tends to have a complicated circuit configuration, surplus power can be effectively used with a simple circuit configuration.
  • An output circuit provided between the first output terminal and the power conditioner; A discharge circuit provided between the storage battery and the power conditioner; The discharge circuit is directly connected to the output circuit without passing through a combining circuit that combines the power from the plurality of power generation units and the power from the storage battery.
  • the power from the storage battery is directly output to the output circuit and supplied to the power conditioner without passing through a combining circuit that combines the power from the plurality of power generation units and the power from the storage battery. .
  • combines the electric power from a some electric power generation part and the electric power from a storage battery, the circuit structure in the power adjustment apparatus for solar power stations can be simplified.
  • the switcher operates the at least one switch element to switch the connection destination of the power generation unit to the power condition only when the output permission unit prohibits the output of power from the storage battery to the power conditioner. Configured to switch to the The output permission unit outputs the power from the storage battery to the power conditioner only when the connection destinations of all the power generation units are switched to the storage battery by the operation of the switch element in the switcher. Configured to allow.
  • the power from the plurality of power generation units and the power from the storage battery are alternatively input to the power conditioner by the switcher and the output permission unit.
  • the switcher is configured to operate each of the plurality of power generation units according to the generated power of the plurality of power generation units
  • the connection destination of the power generation unit is configured to be switched to either the power conditioner or the storage battery.
  • connection destinations of the respective power generation units are switched according to the generated power of the plurality of power generation units, so for example, when the power supplied from the power generation unit to the power conditioner becomes large It is also possible to switch the connection destination of the power generation unit to a storage battery and store it in the storage battery. Thereby, the surplus power can be effectively used with a simple circuit configuration.
  • the switcher in the configuration according to any one of the above (1) to (4), is configured such that the power supplied from the plurality of power generation units to the power conditioner has a first specified value. When it exceeds, by the operation of at least one said switch element, it is comprised so that the connecting point of the said electric power generation part may be switched to the said storage battery.
  • the connection destination of at least one power generation unit is switched to the storage battery when the power supplied from the plurality of power generation units to the power conditioner exceeds the first predetermined value, the first predetermined value is exceeded.
  • the surplus power can be effectively used by storing the surplus power in a storage battery.
  • the switcher in the configuration according to any one of the above (1) to (5), is configured such that the power supplied from the plurality of power generation units to the power conditioner has a first specified value.
  • the number of switch elements operated to switch the connection destination of the power generation unit to the storage battery is changed so as not to exceed the number.
  • the power conditioner can not output power beyond the first specified value, for example, if the first specified value is a value corresponding to the contracted power amount contracted with the power company, the power exceeding the first specified value is Even if power is supplied from the power generation unit to the power conditioner, surplus power exceeding the first specified value is released as heat by the power conditioner, and the surplus power can not be effectively used.
  • the configuration of (6) the number of power generation units whose storage destinations are storage batteries is changed so that the power supplied from the plurality of power generation units to the power conditioner does not exceed the first specified value. Therefore, the surplus power can be stored in the storage battery instead of being released as heat by the power conditioner. Thereby, surplus power can be used effectively.
  • the switcher in any one of the configurations (1) to (6), is configured to set the first prescribed value of the power supplied from the plurality of power generation units to the power conditioner. It is configured to change the number of switch elements operated to switch the connection destination of the power generation unit to the storage battery so as to be the largest within the range not exceeding.
  • the power supplied to the power conditioner is increased within the range not exceeding the first specified value, so that it is possible to suppress the reduction of the power output to the power system.
  • the switcher is configured to set the first prescribed value of the power supplied from the plurality of power generation units to the power conditioner.
  • the connection destination of the power generation unit is switched to the storage battery by the operation of at least one of the switch elements when exceeding, when the power supplied from the plurality of power generation units to the power conditioner falls below a second prescribed value
  • the connection destination of the power generation unit which is the storage battery, is switched to the power conditioner by the operation of at least one of the switch elements.
  • the connection destination is the storage battery whose power storage unit is a storage battery by the operation of at least one switch element. Since the power conditioner is switched to the power conditioner, the power supplied to the power conditioner can be increased. Thereby, the power to be output to the power system can be increased.
  • the switcher is configured to control the voltage of the power supplied from the plurality of power generation units to the power conditioner as the power conditioner.
  • the connection destination of all the power generation units is switched to the storage battery by the operation of the switch element.
  • the storage battery may be able to store electricity.
  • the configuration of (9) since the connection destinations of all the power generation units are switched to the storage battery, the storage battery can be stored with the power from the power generation unit. Thereby, the power generated by the power generation unit can be effectively used.
  • the switcher is configured such that the voltage of the power supplied from the plurality of power generation units to the power conditioner is the power conditioner. If the minimum starting voltage of the power supply is lower than the minimum starting voltage, the connection destination of all the power generation units is switched to the storage battery by the operation of the switch element, and then the voltage of the power supplied to the storage battery from the plurality of power generation units When the minimum starting voltage of the conditioner is exceeded, the connection destination of all the power generation units is switched to the power conditioner by the operation of the switch element.
  • the solar radiation amount decreases due to the deterioration of the weather and the voltage of the power supplied from the plurality of power generation units to the power conditioner falls below the minimum startup voltage of the power conditioner, the solar radiation amount is restored due to the weather recovery.
  • the voltage of the power supplied from the plurality of power generation units to the power conditioner again exceeds the minimum starting voltage of the power conditioner.
  • the configuration of (10) when the voltage of the power supplied from the plurality of power generation units to the storage battery exceeds the minimum startup voltage of the power conditioner, all the power generation is performed by the operation of the switch element The connection destination of the unit is switched from the storage battery to the power conditioner.
  • the amount of power supplied to the power conditioner can be increased, and the amount of power output to the power system can be increased.
  • the storage battery has a storage battery cell group in which a plurality of storage battery cells are connected, The output voltage of the storage battery cell group is within the range of applicable voltage on the input side of the power conditioner.
  • the output voltage of the storage battery cell group is within the range of the compatible voltage of the input side of the power conditioner, the output voltage of the storage battery cell group is the available voltage of the input side of the power conditioner. It is possible to eliminate the need for a DC-DC converter that changes within the range. Thereby, the device configuration can be simplified.
  • the number of the storage battery is one, and power can be supplied to a plurality of the power conditioners.
  • the number of storage batteries can be suppressed to suppress the cost increase.
  • a plurality of the storage batteries are provided corresponding to a plurality of the power conditioners.
  • a plurality of storage batteries are provided corresponding to a plurality of power conditioners, and as described in the above (1), switchers are provided corresponding to the power conditioner. Therefore, in the power conditioner for a solar power plant according to the configuration of (13), a plurality of power conditioners having a simple circuit configuration may be installed according to the number of installed power conditioners, so a plurality of power conditioners are installed. Even in this case, surplus power can be effectively used with a simple circuit configuration.
  • a power generation system according to at least one embodiment of the present invention, Power conditioner, A plurality of power generation units provided corresponding to the power conditioner, each including one or more solar cells; A power conditioner for a solar power plant according to any one of the above (1) to (13); Equipped with
  • the power conditioner for the solar power plant of the configuration of the above (1) since the power conditioner for the solar power plant of the configuration of the above (1) is included, as described in the above (1), for example, Since a part of the generated electric power can be supplied to the power conditioner and the surplus can be stored in the storage battery, the surplus electric power can be effectively used with a simple circuit configuration.
  • a power adjustment method for a solar power plant wherein each of a plurality of power generation units provided corresponding to the power conditioner and including one or more solar battery cells is connected
  • a switcher including a plurality of switch elements each having a first input terminal connected to the power conditioner, a first output terminal connected to the power conditioner, and a second output terminal connected to the storage battery; And a switching step of switching a connection destination of the power generation unit to either the power conditioner or the storage battery.
  • surplus power can be effectively used with a simple circuit configuration. Moreover, according to at least one embodiment of the present invention, surplus power can be effectively used by simple control contents.
  • FIG. 1 It is a figure showing the whole composition of the solar power plant concerning some embodiments. It is a figure explaining the case where multiple electric power generation systems shown in Drawing 1 are installed in a solar power station concerning one embodiment. It is a figure showing the state where the input terminal of one switch element in a switcher was connected with the 2nd output terminal. It is a figure showing the whole structure of the solar power station concerning other embodiment. It is a figure which shows the example of embodiment which comprised the 1st prescription
  • a representation representing a relative or absolute arrangement such as “in a direction”, “along a direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” is strictly Not only does it represent such an arrangement, but also represents a state of relative displacement with an angle or distance that allows the same function to be obtained.
  • expressions that indicate that things such as “identical”, “equal” and “homogeneous” are equal states not only represent strictly equal states, but also have tolerances or differences with which the same function can be obtained. It also represents the existing state.
  • expressions representing shapes such as quadrilateral shapes and cylindrical shapes not only represent shapes such as rectangular shapes and cylindrical shapes in a geometrically strict sense, but also uneven portions and chamfers within the range where the same effect can be obtained.
  • the shape including a part etc. shall also be expressed.
  • the expressions “comprising”, “having”, “having”, “including” or “having” one component are not exclusive expressions excluding the presence of other components.
  • FIG. 1 is a diagram showing the overall configuration of a solar power plant according to some embodiments.
  • a power generation system 1 of a solar power plant includes a power conditioner 10, a solar cell group 20, and a power adjustment device 100.
  • the power conditioner 10 is a device that converts DC power generated by the solar cell group 20 into AC power and outputs the AC power to the power system.
  • the solar cell group 20 includes a plurality of power generation units 22 to which a plurality of solar cell modules 21 including at least one solar battery cell are connected.
  • the power generation unit 22 is also referred to as a string 22.
  • the power conditioning apparatus 100 is a power conditioning apparatus for the power generation system 1, that is, a solar power plant, and includes a storage battery 110 and a switcher 120.
  • Power adjustment apparatus 100 includes an output circuit 131 provided between a first output terminal 121 of switcher 120 described later and power conditioner 10, and a discharge circuit 132 provided between storage battery 110 and power conditioner 10. And an output permission unit 133 provided in the discharge circuit 132.
  • the power adjustment device 100 includes a control circuit 141, a voltage sensor 142, and a current sensor 143.
  • Storage battery 110 includes storage battery cell group 112 to which a plurality of storage battery cells 111 are connected, charging device 113 for charging storage battery cell group 112, and output device 114 for outputting the power stored in storage battery cell group 112 to the outside. And. Storage battery 110 stores the power generated by each power generation unit 22 in storage battery cell group 112, and outputs the stored power to power conditioner 10.
  • Charging device 113 converts a voltage of the input power into a voltage suitable for charging storage battery cell group 112 (not shown), and a charge controller (not shown) controlling charging of storage battery cell group 112 And.
  • the charge controller controls each part of the charging device 113 to start and stop charging of the storage battery cell group 112 based on, for example, a control signal of the control circuit 141. Also, the charge controller monitors, for example, the remaining charge amount of the storage battery cell group 112 being charged, and stops the charging of the storage battery cell group 112 when it is determined that the storage battery cell group 112 is fully charged. Control each part.
  • Output device 114 includes a DC-DC converter (not shown) for converting the voltage of the power stored in storage battery cell group 112 into a voltage suitable for output to power conditioner 10, and the output of the power stored in storage battery cell group 112. And a discharge controller (not shown) to control.
  • the discharge controller controls each part of the output device 114 to start and stop the discharge of the power stored in the storage battery cell group 112 to the outside based on, for example, a control signal of the control circuit 141.
  • the discharge controller monitors, for example, the remaining charge of storage battery cell group 112 so that storage battery cell group 112 is not in the overdischarged state, and determines that the remaining charge capacity has decreased to a predetermined remaining charge amount.
  • Each part of the output device 114 is controlled to stop the discharge from the group 112. If the output voltage of storage battery cell group 112 is within the range of the compatible voltage at the input side of power conditioner 10, it is not necessary to provide a DC-DC converter in output device 114, so the device configuration can be simplified. , You can reduce the cost.
  • the switcher 120 is a device that switches the connection destination of each power generation unit 22 to either the power conditioner 10 or the storage battery 110, and is a switch element 124 having a first output terminal 121, a second output terminal 122, and an input terminal 123. Contains more than one. Each switch element 124 individually switches whether to connect the input terminal 123 and the first output terminal 121 or to connect the input terminal 123 and the second output terminal 122 by a control signal from the control circuit 141 described later. It is configured to be possible. Each switch element 124 of the switcher 120 may be a mechanical switch or a relay having a mechanical contact, or may be a semiconductor switch. It is sufficient if it can be switched.
  • Each first output terminal 121 is connected to the input side of the power conditioner 10 via the output circuit 131, respectively.
  • the second output terminals 122 are each connected to the charging device 113 of the storage battery 110.
  • Each of the plurality of power generation units 22 is connected to each input terminal 123.
  • One end of the discharge circuit 132 is connected to the output device 114 of the storage battery 110, and the other end is connected to the output circuit 131. That is, some embodiments include an output circuit 131 provided between the first output terminal 121 and the power conditioner 10, and a discharge circuit 132 provided between the storage battery 110 and the power conditioner 10.
  • the discharge circuit 132 is directly connected to the output circuit 131 without passing through a combining circuit that combines the power from the plurality of power generation units 22 and the power from the storage battery 110. Therefore, the power from the storage battery 110 is directly output to the output circuit 131 and supplied to the power conditioner 10 without passing through a combining circuit that combines the power from the plurality of power generation units 22 and the power from the storage battery 110.
  • there is no need to provide a combining circuit that combines the power from the plurality of power generation units 22 and the power from the storage battery 110 so the circuit configuration in the power adjustment device 100 can be simplified.
  • the output permission unit 133 is, for example, a switch provided in the discharge circuit 132 to open or close the discharge circuit 132 or a disconnector, and opens or closes the discharge circuit 132 by a control signal from a control circuit 141 described later.
  • the output of power from storage battery 110 to power conditioner 10 is permitted or prohibited.
  • the control circuit 141 is a control circuit that controls each part of the power adjustment apparatus 100. The control contents of the control circuit 141 will be described later.
  • the voltage sensor 142 and the current sensor 143 are sensors that detect the voltage and current of the power supplied to the power conditioner 10, and are provided in the output circuit 131.
  • the power conditioner 10 when the power generated by the power generation unit 22 is supplied to the power conditioner 10 via the switcher 120, the power conditioner 10 outputs power to the power system.
  • the size of the power output from the solar power plant to the power grid is limited to the contract power contracted with the power company.
  • This contracted power is, for example, 49.5 kw, for example, in a solar power plant linked to the voltage system at low pressure.
  • the upper limit value W out -max of the power that can be output from the power conditioner 10 to the power system is the contract power Wcv. It becomes a value.
  • the upper limit value W out -max of the power that can be output from each power conditioner 10 to the power system Is a value (Wcv / n) obtained by dividing the contracted power Wcv by the number n of installed power generation systems 1.
  • the maximum value is referred to as a first predetermined value Sv1.
  • FIG. 2 is a figure explaining the case where multiple electric power generation systems 1 shown in FIG. 1 are installed in the solar power station which concerns on one Embodiment.
  • the configuration of the solar cell group 20, the storage battery 110 and the switcher 120 is omitted in FIG. 2, the configuration of the solar cell group 20, the storage battery 110 and the switcher 120 in FIG.
  • the configuration is the same as that of the storage battery 110 and the switcher 120.
  • the amount of electricity generated by solar cells depends on the amount of solar radiation, it decreases in the morning and evening and is susceptible to the weather. Therefore, in order to generate as much electric power as possible for a long time of day, a solar power plant is generally provided with a solar cell having a generation capacity exceeding the contracted amount of power.
  • the power generation capacity of the solar cell group 20 provided corresponding to the power conditioner 10 exceeds the above-described first specified value. Therefore, for example, in a sunny daytime, the power generated by the solar cell group 20 exceeds the first specified value Sv1.
  • the connection destination of the power generation unit 22 is a power conditioner by the operation of at least one switch element 124 of the switcher 120.
  • the storage battery 110 stores surplus power.
  • the power stored in the storage battery 110 is supplied to the power conditioner 10 to supply power to the power system.
  • the power adjustment method includes a switching step of switching the connection destination of each power generation unit 22 to either the power conditioner 10 or the storage battery 110 by the operation of the switch element 124 of each of the switchers 120.
  • the details of this switching step are as follows.
  • control circuit 141 controls each part of power conditioner 100 as follows. Hereinafter, the control contents performed by the control circuit 141 will be described with time.
  • the control circuit 141 causes the storage battery 110 to be connected to all the power generation units 22 until a predetermined time t1 is reached based on the information on the time obtained from the built-in clock function. And outputs a control signal for operating the switch element 124 to the switcher 120.
  • the switcher 120 each of the input terminals 123 is connected to each of the second output terminals 122. Therefore, the connection destination of all the power generation units 22 is the storage battery 110.
  • time t1 is time when it can be expected to start the output to the electric power grid of the generated power by sunlight, for example.
  • the information of the time t1 is, for example, information of a time in which the latitude and longitude of the location of the solar power plant is considered, and is stored in a storage unit (not shown) of the control circuit 141.
  • the information of the time t1 includes information of a plurality of times set according to the season.
  • the control circuit 141 selects and acquires information of the suitable time t1 from among the information of the plurality of times t1 based on the information of the month and day obtained from the built-in calendar function.
  • the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of all the power generation units 22 to the power conditioner 10.
  • the switcher 120 each of the input terminals 123 is connected to each of the first output terminals 121. Therefore, the connection destination of all the power generation units 22 is used as the power conditioner 10.
  • control circuit 141 Before outputting the control signal to the switcher 120, the output permission unit 133 outputs the control signal for stopping the power supply from the storage battery 110 to the output device 114 of the storage battery 110 and opens the discharge circuit 132. Output control signal to Thus, the output device 114 stops the power supply from the storage battery 110 to the power conditioner 10, and the output permission unit 133 disconnects the storage battery 110 from the output circuit 131.
  • control circuit 141 operates the switch element 124 of the switcher 120 such that the power from the plurality of power generation units 22 and the power from the storage battery 110 are alternatively input to the power conditioner 10,
  • the open / close state of the output permission unit 133 is controlled. That is, in some embodiments, the switcher 120 generates power by operating the at least one switch element 124 only when the output permission unit 133 prohibits the output of power from the storage battery 110 to the power conditioner 10.
  • the connection destination of the unit 22 is configured to be switched to the power conditioner 10.
  • time t0 is stored in a storage unit (not shown) of control circuit 141 as information of a plurality of times set according to the season, taking into account the latitude and longitude of the location of the solar power plant, as in the above time t1. It may be done.
  • the voltage of the power supplied from the plurality of power generation units 22 to the storage battery 110 is the minimum startup voltage of the power conditioner 10 by the detection function of the input voltage included in the charging device 113 of the storage battery 110. It is possible to detect that it has exceeded. That is, when the charging device 113 detects that the input voltage exceeds the minimum start-up voltage of the power conditioner 10, a signal notifying that the input voltage exceeds the minimum start-up voltage of the power conditioner 10 is sent to the control circuit 141. Output. Then, when the control circuit 141 receives the signal, the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of all the power generation units 22 to the power conditioner 10.
  • a voltage sensor may be separately provided to detect that the voltage of the generated power in each power generation unit 22 has exceeded the minimum start-up voltage of power conditioner 10.
  • control circuit 141 outputs to the switcher 120 a control signal for operating the switch element 124 to switch the connection destination of all the power generation units 22 to the power conditioner 10. It explains as a premise.
  • the control circuit 141 performs the following control from time t1 to a predetermined time t2 after the evening.
  • time t2 is time when it becomes impossible to expect, for example, to output power generated by sunlight to the power system.
  • the time t2 is stored in a storage unit (not shown) of the control circuit 141 as information of a plurality of times set in accordance with the season after taking into consideration the latitude and longitude of the location of the solar power plant, for example. ing.
  • the control circuit 141 monitors the voltage and the magnitude of the power supplied from the solar cell group 20 to the power conditioner 10 based on the voltage and the current detected by the voltage sensor 142 and the current sensor 143.
  • the control circuit 141 causes the power conditioner 10 to be connected to all the power generation units 22 and The control signal for operating the switch element 124 is output to the switcher 120 as follows.
  • the control circuit 141 causes the connection of one power generation unit 22 to be connected
  • the control signal is output to the switcher 120 to operate the switch element 124 so as to switch the storage battery 110 to the storage battery 110.
  • the control circuit 141 also outputs a control signal to the charging device 113 to start charging the storage battery cell group 112.
  • FIG. 3 is a diagram showing a state in which the input terminal 123 of one switch element 124 in the switcher 120 is connected to the second output terminal 122.
  • the power supplied from the solar cell group 20 to the power conditioner 10 has the first specified value Sv1 in order to suppress excessive switching of the switch element 124 and repetition of excessive charging start and stop in the storage battery 110.
  • the control circuit 141 may output the control signal when the exceeded state continues beyond a predetermined time. Even in cases other than this, when outputting a control signal for switching the connection destination in the switch element 124, or when outputting a control signal for switching the start and stop of charging / discharging of the charging device 113 of the storage battery 110 or the output device 114. The same is true for
  • the switcher 120 operates the at least one switch element 124 when the power supplied from the plurality of power generation units 22 to the power conditioner 10 exceeds the first predetermined value Sv1.
  • the connection destination of the power generation unit 22 is configured to be switched to the storage battery 110. Thereby, it is possible to effectively utilize the surplus power for the amount exceeding the first specified value Sv1 in the storage battery.
  • the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of yet another power generation unit 22 to the storage battery 110.
  • the switcher 120 the input terminal 123 of yet another switch element 124 is connected to the second output terminal 122.
  • the control circuit 141 performs control of sequentially switching the connection destination of the power generation unit 22 to the storage battery 110 until the power supplied from the solar cell group 20 to the power conditioner 10 falls below the first specified value Sv1.
  • the connection destination of the power generation unit 22 is switched to the storage battery 110 such that the power supplied to the power conditioner 10 becomes the largest within the range not exceeding the first specified value Sv1.
  • the switcher 120 is connected to the power generation unit 22 such that the power supplied from the plurality of power generation units 22 to the power conditioner 10 does not exceed the first specified value Sv1. It is configured to change the number of switch elements 124 operated to switch to the storage battery 110. As a result, since the surplus power can be stored in the storage battery 110 instead of being released as heat by the power conditioner 10, the surplus power can be effectively used.
  • the switcher 120 is configured such that the power supplied from the plurality of power generation units 22 to the power conditioner 10 is the largest within a range not exceeding the first predetermined value Sv1.
  • the number of switch elements 124 operated to switch the connection destination to the storage battery 110 is changed.
  • the power supplied to the power conditioner 10 increases in the range not exceeding the first specified value Sv1, and therefore, it is possible to suppress a decrease in the power output to the power system.
  • the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of one power generation unit 22 to the power conditioner 10.
  • the switcher 120 one switch element 124 whose input terminal 123 is connected to the first output terminal 121 is added. Therefore, the number of power generation units 22 that supply generated power to the power conditioner 10 is increased by one.
  • the second prescribed value Sv2 is, for example, the power value W in-max described above, that is, the maximum value of DC power supplied to the power conditioner 10 divided by the number ⁇ of the power generation units 22 in the solar cell group 20
  • the value (W in -max / ⁇ ) is set to a value (Sv1- (W in -max / ⁇ )) obtained by subtracting the first specified value Sv1.
  • the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of yet another power generation unit 22 to the power conditioner 10.
  • the input terminal 123 of the further switch element 124 is connected to the first output terminal 121.
  • the control circuit 141 repeats control of sequentially switching the connection destination of the power generation unit 22 to the power conditioner 10 until the power supplied from the solar cell group 20 to the power conditioner 10 exceeds the second specified value Sv2.
  • the connection destination of the power generation unit 22 is switched to the power conditioner 10 so that the power supplied to the power conditioner 10 becomes the largest within the range not exceeding the first specified value Sv1.
  • the switcher 120 operates the at least one switch element 124 when the power supplied from the plurality of power generation units 22 to the power conditioner 10 exceeds the first predetermined value Sv1.
  • connection is performed by the operation of at least one switch element 124
  • the connection destination of the power generation unit 22 whose tip is the storage battery 110 is configured to be switched to the power conditioner 10.
  • the power generated by the solar cell group 20 can not be output from the power conditioner 10 to the power system. However, even in such a case, the storage battery 110 may be able to be charged by the power generated by the solar cell group 20.
  • the control circuit 141 determines the connection destination of all the power generation units 22.
  • the control signal is output to the switcher 120 to operate the switch element 124 so as to switch the storage battery 110 to the storage battery 110.
  • the control circuit 141 also outputs a control signal to the charging device 113 to start charging the storage battery cell group 112.
  • the input terminals 123 of all the switch elements 124 are connected to the second output terminal 122. Therefore, the power generated by all the power generation units 22 is supplied to storage battery 110.
  • storage battery 110 when storage battery cell group 112 can be charged by the power generated by power generation unit 22, charging of storage battery cell group 112 is started.
  • the switcher 120 operates the switch element 124 when the voltage of the power supplied to the power conditioner 10 from the plurality of power generation units 22 falls below the minimum start-up voltage of the power conditioner 10.
  • the connection destinations of all the power generation units 22 are configured to be switched to the storage battery 110. Thereby, even if the voltage of the power supplied from the plurality of power generation units 22 to the power conditioner 10 falls below the minimum start-up voltage of the power conditioner 10, the storage battery 110 can be stored with the power from the power generation unit 22 . Thereby, the electric power generated by the power generation unit 22 can be effectively used.
  • control circuit 141 A control signal for operating the switch element 124 is output to the switcher 120 so that the connection destination of all the power generation units 22 is switched to the power conditioner 10.
  • the control circuit 141 also outputs a control signal to the charging device 113 so as to stop the charging of the storage battery cell group 112.
  • the voltage of the power supplied from the plurality of power generation units 22 to the storage battery 110, that is, the solar cell group 20 is generated by the detection function of the input voltage of the charging device 113. It can be detected that the voltage of the power exceeds the minimum starting voltage of the power conditioner 10.
  • the charging device 113 detects that the input voltage exceeds the minimum start-up voltage of the power conditioner 10, it controls a signal notifying that the input voltage exceeds the minimum start-up voltage of the power conditioner 10. It outputs to the circuit 141.
  • the control circuit 141 receives the signal, the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of all the power generation units 22 to the power conditioner 10.
  • the switcher 120 the input terminals 123 of all the switch elements 124 are connected to the first output terminal 121. Therefore, the power generated by all the power generation units 22 is supplied to the power conditioner 10. Moreover, in the storage battery 110, charging of the storage battery cell group 112 is stopped.
  • the switcher 120 operates the switch element 124 when the voltage of the power supplied to the power conditioner 10 from the plurality of power generation units 22 falls below the minimum start-up voltage of the power conditioner 10. Therefore, when the connection destination of all the power generation units 22 is switched to the storage battery 110 and thereafter the voltage of the power supplied from the plurality of power generation units 22 to the storage battery 110 exceeds the minimum startup voltage of the power conditioner 10, It is comprised so that the connection destination of all the electric power generation parts 22 may be switched to the power conditioner 10 by operation. As a result, the amount of power supplied to the power conditioner 10 can be increased, and the amount of power output to the power system can be increased.
  • the switcher 120 operates the switch element 124 to set the connection destination of each power generation unit 22 according to the generated power of the plurality of power generation units 22 as the power conditioner 10 or It is configured to switch to any one of the storage batteries 110.
  • the connection destinations of the respective power generation units 22 are switched according to the generated power of the plurality of power generation units 22. For example, when the power supplied from the power generation unit 22 to the power conditioner 10 becomes large It becomes possible to switch the connection destination of the unit 22 to the storage battery 110 and store the storage battery 110 in it. Thereby, the surplus power can be effectively used with a simple circuit configuration.
  • the control circuit 141 outputs, to the switcher 120, a control signal for operating the switch element 124 so as to switch the connection destination of all the power generation units 22 to the storage battery 110.
  • the switcher 120 each of the input terminals 123 is connected to each of the second output terminals 122. Therefore, the connection destination of all the power generation units 22 is the storage battery 110.
  • the control circuit 141 outputs a control signal for starting the discharge from the storage battery 110 to the output device 114 of the storage battery 110, and outputs a control signal to the output permission unit 133 so as to close the discharge circuit 132.
  • the output device 114 starts the power supply from the storage battery 110 to the power conditioner 10, and the output permission unit 133 connects the storage battery 110 and the output circuit 131. Thereby, the power stored in storage battery 110 is supplied to power conditioner 10.
  • Power conditioner 10 converts DC power from storage battery 110 into AC power and outputs the AC power to a power system.
  • the control circuit 141 operates the switch element 124 of the switcher 120 such that the power from the plurality of power generation units 22 and the power from the storage battery 110 are alternatively input to the power conditioner 10,
  • the open / close state of the output permission unit 133 is controlled. That is, in some embodiments, in the switcher 120, the output allowing unit 133 outputs power from the storage battery 110 only when the connection destinations of all the power generation units 22 are switched to the storage battery 110 by the operation of the switch element 124. It is configured to allow the output of power to the conditioner 10.
  • the power from the plurality of power generation units 22 and the power from the storage battery 110 are alternatively input to the power conditioner 10 by the switcher 120 and the output permission unit 133.
  • the switcher 120 and the output permission unit 133 there is no need to provide a combining circuit that combines the power from the plurality of power generation units 22 and the power from the storage battery 110, so the circuit configuration in the power adjustment device 100 can be simplified.
  • Discharge from storage battery 110 is continued until the remaining charge of storage battery 110 (storage battery cell group 112) reaches a predetermined remaining charge, or until time t1 is reached. That is, the output device 114 of the storage battery 110 monitors the remaining charge amount of the storage battery cell group 112 during discharge from the storage battery cell group 112. Then, when it is determined that the remaining charge amount has decreased to a predetermined remaining charge amount, the output device 114 stops the discharge from the storage battery cell group 112. In addition, the output device 114 outputs, to the control circuit 141, a signal notifying that the discharge from the storage battery cell group 112 has been stopped.
  • control circuit 141 When the control circuit 141 receives the signal, the control circuit 141 outputs a control signal to the output permitting unit 133 so as to open the discharge circuit 132. Thereby, the output permission unit 133 disconnects the storage battery 110 from the output circuit 131. If time t1 is reached before the remaining charge amount of storage battery cell group 112 decreases to a predetermined remaining charge amount, control circuit 141 outputs a control signal for stopping discharge from storage battery 110 to output device 114 of storage battery 110 At the same time, a control signal is output to the output permission unit 133 so as to open the discharge circuit 132. Thus, the output device 114 stops the discharge from the storage battery cell group 112, and the output permission unit 133 disconnects the storage battery 110 from the output circuit 131.
  • the power adjustment device 100 includes the storage battery 110 and the switcher 120.
  • the switcher 120 is provided corresponding to the power conditioner 10 and has an input terminal 123 to which each of a plurality of power generation units 22 each including one or more solar battery cells is connected, and a first output connected to the power conditioner A plurality of switch elements 124 each having a terminal 121 and a second output terminal 122 connected to the storage battery 110 are included.
  • the switcher 120 is configured to be able to switch the connection destination of each power generation unit 22 to either the power conditioner 10 or the storage battery 110 by the operation of each switch element 124.
  • the power generation system 1 according to some embodiments is provided corresponding to the power conditioner 10 and the power conditioner 10, and includes a plurality of power generation units 22 each including one or more solar cells, and power adjustment And an apparatus 100.
  • connection destination of each power generation unit 22 can be switched by the operation of the switch element 124 of the switcher 120, so switching of the power supply destination generated by each power generation unit 22 or power generation by each power generation unit 22
  • the distributed power can be realized by a simple circuit configuration. Therefore, by the operation of the switch element 124 of the switcher 120, for example, part of the electric power generated by each of the power generation units 22 can be supplied to the power conditioner 10 and the surplus can be stored in the storage battery 110. As a result, since it is not necessary to use a circuit for performing distribution and combination of power which tends to have a complicated circuit configuration, surplus power can be effectively used with a simple circuit configuration.
  • the power adjustment method includes an input terminal 123 provided corresponding to the power conditioner 10 and connected to each of the plurality of power generation units 22 each including one or more solar cells,
  • the switcher 120 including a plurality of switch elements 124 each having the first output terminal 121 connected to the conditioner 10 and the second output terminal 122 connected to the storage battery 110, each power generation is performed by operation of each switch element 124.
  • a switching step of switching the connection destination of the unit 22 to any one of the power conditioner 10 and the storage battery 110 is provided. Thereby, the surplus power can be effectively used by simple control contents such as switching control of the switch element 124.
  • a plurality of storage batteries 110 are provided corresponding to the plurality of power conditioners 10.
  • the switcher 120 is also provided corresponding to the power conditioner 10.
  • the power conditioner 100 can be applied retrofit to existing solar power plants.
  • the switcher 120 is interposed between the power conditioner 10 and the solar cell group 20 in the existing solar power plant. That is, each power generation unit 22 of the solar cell group 20 is connected to each of the input terminals 123 of the switcher 120. Then, the first output terminals 121 of the switcher 120 are connected to the input side of the power conditioner 10 via the output circuit 131, respectively. Further, the second output terminals 122 of the switcher 120 are connected to the charging device 113 of the storage battery 110 respectively.
  • one end of the discharge circuit 132 provided with the output permitting unit 133 is connected to the output device 114 of the storage battery 110, and the other end is connected to the output circuit 131.
  • the voltage sensor 142 and the current sensor 143 are installed in the output circuit 131. Note that instead of installing the voltage sensor 142 and the current sensor 143, information on the voltage and current of the input power to the power conditioner 10 may be acquired from the power conditioner 10.
  • the first prescribed value Sv1 and the second prescribed value Sv2 may be changed by an instruction from the outside of the solar power plant.
  • FIG. 5 is a diagram showing an example of an embodiment in which the first predetermined value Sv1 and the second predetermined value Sv2 can be changed by an instruction from the outside of the solar power plant.
  • a server 90 is installed outside the solar power plant.
  • the server 90 is configured to be able to output a change instruction for changing the first predetermined value Sv1 or the second predetermined value Sv2.
  • the change instruction includes at least information on values of the first predetermined value Sv1 and the second predetermined value Sv2 after the change.
  • the change instruction includes the date and time information for changing the values of the first predetermined value Sv1 and the second predetermined value Sv2, and the original values of the first predetermined value Sv1 and the second predetermined value Sv2 after the change. It may include date and time information etc.
  • Information transfer between the control circuit 141 of the power adjustment apparatus 100 and the server 90 is performed via, for example, a communication network 91 including a telephone line, the Internet, and the like.
  • the control circuit 141 is configured to be able to change the first predetermined value Sv1 and the second predetermined value Sv2 based on the received change instruction.
  • the control circuit 141 When the control circuit 141 receives the change command output from the server 90, the control circuit 141 changes the value of the first predetermined value Sv1 or the second predetermined value Sv2 included in the change command based on the received change command. The value is updated to the value of the specified value Sv1 or the second specified value Sv2. Information on the date and time when the values of the first prescribed value Sv1 and the second prescribed value Sv2 are changed to the change instruction, and the values of the first prescribed value Sv1 and the second prescribed value Sv2 are returned to the original values When the date and time information is included, the control circuit 141 changes the values of the first predetermined value Sv1 and the second predetermined value Sv2 or restores the original values based on the information.
  • the power output to the power system can be easily generated by configuring the first specified value Sv1 and the second specified value Sv2 to be able to be changed by an instruction from the outside of the solar power plant. Can be suppressed or released.
  • the power company managing the electric power system requests the suppression of the generated power from the solar power plant, it can be coped with by the remote control by the server 90.
  • the server 90 even if it is necessary to suppress the power output to the power system as described above, since the surplus power can be stored in the storage battery 110, the surplus power can be effectively used.
  • FIG. 4 is a diagram showing the overall configuration of a solar power plant according to another embodiment. That is, in the other embodiment shown in FIG. 4, one storage battery 110 is configured to be able to supply power to a plurality of power conditioners 10.
  • the number of storage batteries 110 can be suppressed to suppress cost increase.
  • the power generation system 1A of the solar power plant according to the other embodiment shown in FIG. 4 has some embodiments described above except that one storage battery 110 is installed for a plurality of power generation systems 1A. It has the same configuration as the power generation system 1 according to.
  • the number n of installed power generation systems 1A may be more than one, and the number of storage batteries 110 installed may be less than the number n installed of power generation systems 1A.
  • the power generation unit 22 includes a plurality of solar cell modules 21 connected in series.
  • the number of solar cell modules 21 included in the power generation unit 22 may be one.
  • voltage sensor 142 and current sensor 143 are provided in output circuit 131.
  • at least one of the voltage sensor 142 and the current sensor 143 may be a sensor (not shown) provided in the power conditioner 10 to detect the voltage or current of the power supplied to the power conditioner 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

Un appareil de réglage de puissance pour une centrale solaire selon la présente invention comprend : une batterie rechargeable; et un commutateur comprenant une pluralité d'éléments de commutation ayant des bornes d'entrée auxquelles sont connectées une pluralité d'unités de production d'énergie respectives, qui sont disposées en correspondance avec des conditionneurs d'énergie et dont chacune comprend une ou plusieurs cellules de batterie solaire, des premières bornes de sortie connectées aux conditionneurs d'énergie, et des secondes bornes de sortie connectées à la batterie rechargeable. En actionnant chacun des éléments de commutation, le commutateur commute la destination de connexion de chacune des unités de production d'énergie soit vers le conditionneur d'énergie soit vers la batterie rechargeable.
PCT/JP2017/033099 2017-09-13 2017-09-13 Appareil de réglage de puissance pour centrale solaire, système de production d'énergie et procédé de réglage de puissance pour centrale solaire WO2019053824A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2017/033099 WO2019053824A1 (fr) 2017-09-13 2017-09-13 Appareil de réglage de puissance pour centrale solaire, système de production d'énergie et procédé de réglage de puissance pour centrale solaire
JP2019520914A JPWO2019053824A1 (ja) 2017-09-13 2017-09-13 ソーラ発電所用の電力調整装置、発電システム及びソーラ発電所用の電力調整方法

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PCT/JP2017/033099 WO2019053824A1 (fr) 2017-09-13 2017-09-13 Appareil de réglage de puissance pour centrale solaire, système de production d'énergie et procédé de réglage de puissance pour centrale solaire

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WO2021251326A1 (fr) * 2020-06-08 2021-12-16 ＡＵＲＡ－Ｇｒｅｅｎ Ｅｎｅｒｇｙ株式会社 Système pour utiliser la puissance excédentaire provenant d'énergie renouvelable
CN116031955A (zh) * 2023-03-31 2023-04-28 赫里欧新能源有限公司 一种微电网型风光柴热储智能互补电力供应方法及系统

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JP2013183488A (ja) * 2012-02-29 2013-09-12 Sharp Corp 電力制御装置および電力システム
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JP2004023879A (ja) * 2002-06-14 2004-01-22 Mitsubishi Heavy Ind Ltd 給電システム及びその制御方法
JP2013183488A (ja) * 2012-02-29 2013-09-12 Sharp Corp 電力制御装置および電力システム
JP2017051083A (ja) * 2015-09-02 2017-03-09 清水建設株式会社 発電システム、発電方法およびプログラム
JP2017060375A (ja) * 2015-09-14 2017-03-23 株式会社福元技研 再生可能エネルギーによる発電電力の電力供給方法およびそのシステム

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Publication number Priority date Publication date Assignee Title
WO2021251326A1 (fr) * 2020-06-08 2021-12-16 ＡＵＲＡ－Ｇｒｅｅｎ Ｅｎｅｒｇｙ株式会社 Système pour utiliser la puissance excédentaire provenant d'énergie renouvelable
JP2021193869A (ja) * 2020-06-08 2021-12-23 ＡＵＲＡ−Ｇｒｅｅｎ Ｅｎｅｒｇｙ株式会社 自然エネルギー余剰電力の利活用システム
JP7096555B2 (ja) 2020-06-08 2022-07-06 ＡＵＲＡ－Ｇｒｅｅｎ Ｅｎｅｒｇｙ株式会社 自然エネルギー余剰電力の利活用システム
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CN116031955B (zh) * 2023-03-31 2023-06-27 赫里欧新能源有限公司 一种微电网型风光柴热储智能互补电力供应方法及系统

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