WO2006082727A1 - Dispositif de generation d'energie photovoltaique et controleur de connexion - Google Patents

Dispositif de generation d'energie photovoltaique et controleur de connexion Download PDF

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Publication number
WO2006082727A1
WO2006082727A1 PCT/JP2006/300993 JP2006300993W WO2006082727A1 WO 2006082727 A1 WO2006082727 A1 WO 2006082727A1 JP 2006300993 W JP2006300993 W JP 2006300993W WO 2006082727 A1 WO2006082727 A1 WO 2006082727A1
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WIPO (PCT)
Prior art keywords
power
solar cell
solar
housing
switch
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Application number
PCT/JP2006/300993
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English (en)
Japanese (ja)
Inventor
Hiroki Mori
Original Assignee
Sharp Kabushiki Kaisha
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Publication of WO2006082727A1 publication Critical patent/WO2006082727A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • 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

Definitions

  • Photovoltaic power generation device and connection control device are Photovoltaic power generation device and connection control device
  • the present invention relates to a photovoltaic power generation system, and more particularly to a photovoltaic power generation apparatus and a connection control apparatus having a safety measure function in a natural disaster.
  • the power from the solar panel is set by turning off the switch in the power conditioner. Shut off the input.
  • JP-A-2002-051571 Patent Document 1
  • the output of the boost unit is When the voltage becomes overvoltage, the input breaker in the boost unit is tripped. Thereby, the line with the solar cell string side is opened, and abnormal power can be prevented from being input to the inverter.
  • Patent Document 1 JP 2002-051571 A
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a solar power generation device and a connection control device capable of sufficiently taking safety measures in a natural disaster. Is to provide.
  • a solar power generation device includes a plurality of power generators that receive sunlight and generate power.
  • a solar cell panel including a solar cell module, one or more wirings for extracting DC power from the solar cell panels, and power conversion for converting the DC power obtained through the wirings to predetermined output power And a switch provided for each wiring to cut off DC power from the solar panel, a detection unit for comparing the observed amount with a predetermined amount, and a detection unit And a control unit for controlling conduction Z non-conduction of the switch based on the signal.
  • the switch is disposed at a tip portion of the wiring on the solar cell panel side.
  • the switch is arranged on an installation base for installing the solar cell panel on a roof or the like.
  • the switch causes the electrical connection between the solar cell panel and the power conversion unit to be irreversibly in a non-conductive state.
  • the switch mechanically disconnects the electrical connection between the solar cell panel and the power conversion unit.
  • a housing including a power conversion unit and a control unit is further provided, and the detection unit is installed at a position lower than a position where the housing is attached, and detects the presence or absence of water immersion at the position.
  • the detection unit detects vibration.
  • the apparatus further includes a casing including a power conversion unit and a control unit, and the detection unit is installed outside the casing and detects the presence or absence of ignition.
  • a housing including a power conversion unit and a control unit is further provided, and the detection unit is installed in the housing and detects the presence or absence of water in the housing.
  • the apparatus further includes a casing including a power conversion unit and a control unit, and the detection unit is installed in the casing and detects the presence or absence of the dropout / tilt of the casing.
  • a housing including a power conversion unit and a control unit is further provided, and the detection unit is installed in the housing and detects the presence or absence of heat generation abnormality in the housing.
  • the detection unit includes a plurality of detectors
  • the control unit controls conduction Z non-conduction of the switch based on signals from the plurality of detectors.
  • the apparatus further includes a housing including a power conversion unit and a control unit, and the detection unit is outside the housing. Including a first detector for comparing the observed amount with a predetermined amount and a second detector for comparing the observed amount with a predetermined amount in the housing.
  • the switch detects an abnormal condition, the switch is reversibly turned off, and when the second sensor detects an error condition, the switch is irreversibly turned off. .
  • the first detector is installed at a position lower than a position where the casing is attached, detects the presence or absence of water immersion at the position, and the second detector is installed in the casing. Detects whether there is water in the body.
  • the apparatus further includes a housing including a power conversion unit and a control unit, and the detection unit is installed in the housing and the first detector for detecting vibration, and the housing is dropped and inclined.
  • a second detector for detecting the presence or absence of the sensor, and when the first detector detects an abnormal state, the control unit reversibly puts the switch into a non-conductive state, and the second detector If the switch detects an abnormal condition, the switch is switched off and turned off.
  • the first detector is installed outside the casing and detects the presence or absence of ignition
  • the second detector is installed in the casing and detects the presence or absence of heat generation abnormality in the casing. To do.
  • a power storage unit for supplying electric power for control operation in the control unit is further provided.
  • a connection control device includes a solar cell panel including a plurality of solar cell modules that receive sunlight to generate power, and a predetermined power capable of outputting DC power from the solar cell panel.
  • a connection addition control device that is added to control the opening and closing of the power supply line of the solar cell panel power to a solar power generation device that includes a power conversion unit for converting into electric power. Wiring to extract DC power of panel power, and a switch provided for each wiring to cut off DC power from the solar battery panel, and to compare the observed amount with a predetermined amount A detection unit; and a control unit for controlling conduction / non-conduction of the switch based on a signal from the detection unit.
  • the electric power from the solar cell panel can be cut off based on the signal from the detection unit. Therefore, it is possible to prevent electric shock and electric leakage at the time of disaster.
  • FIG. 1 is a block diagram of a general photovoltaic power generation apparatus.
  • FIG. 2 is a block diagram of the solar power generation device according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart showing a flow of safety measure processing executed by the control circuit of the photovoltaic power generator according to Embodiment 1 of the present invention.
  • FIG. 4 is a diagram showing an example of a state of installation of a solar cell module string in a normal state.
  • FIG. 5 is a diagram showing a situation in which a solar cell module is disconnected from an installation base.
  • FIG. 6 is a block diagram of a photovoltaic power generation apparatus according to a modification of the first embodiment.
  • FIG. 1 is a block diagram of a general photovoltaic power generator 1.
  • a photovoltaic power generation device 1 is used to firmly attach a solar cell array 10 composed of a plurality of solar cell module strings 11, a power conditioner 12, and a solar cell array 10 to the roof.
  • a gantry 20 is provided.
  • the solar cell module string 11 includes a plurality of solar cell modules (not shown) that receive sunlight and generate electric power.
  • Solar cell module strings 11 are especially When installed on the root surface, for example, a unit in which a plurality of solar cell modules (not shown) formed in a panel shape are connected in series or in parallel and bundled.
  • a wiring 50 for supplying power to the power conditioner 12 is provided for each solar cell module string 11. As described above, the output from the solar cell array 10 is input to the solar cell module string 11 via the wiring 50. In FIG. 1, three solar cell module strings 11 are provided in the solar cell array 10, and three wirings 50 are connected to the power conditioner 12.
  • the power conditioner 12 converts the switch 14 for cutting off the power from the solar cell module string 11 and the DC power from the solar cell module string 11 into predetermined power that can be supplied to the load 40. And a control circuit 16 for controlling the conduction Z non-conduction of the switch 14 and controlling the operation of the power conversion unit 30.
  • Control circuit 16 performs constant voltage control such that the input voltage to power conversion unit 30 is constant, for example. That is, if the voltage from the solar cell module string 11 is abnormal, the control circuit 16 controls the switch 14 to be in a non-conductive state. As a result, it is possible to prevent an overvoltage from being applied to the power conversion unit 30 and a failure.
  • the input from the solar cell module string 11 to the power conditioner 12 is blocked by a switch 14 built in the power conditioner 12. Therefore, when there is sunlight, the wiring 50 connecting the solar cell module string 11 and the power conditioner 12 remains in a state where the output from the solar cell module string 11 is directly applied. That is, the output from the solar cell module string 11 is directly applied to the input terminal of the power conditioner 12 even in the event of an abnormality due to a natural disaster or the like. For this reason, there was a risk of electric shock at the input terminal of the inverter 12. In addition, even if a junction box (see Fig. 5) is provided between the solar cell module string 11 and the power conditioner 12, and the junction box is provided with a switch, the same risk is observed. Will occur.
  • the photovoltaic power generator is configured as follows.
  • FIG. 2 is a block diagram of photovoltaic power generation apparatus 1000 according to Embodiment 1 of the present invention.
  • This solar power generation apparatus 1000 is robust to a solar panel including a plurality of solar battery modules, for example, a solar battery array 110 composed of solar battery module strings 111, a power conditioner 112, and a solar battery array 110. And a pedestal 120 for mounting on the rack.
  • the solar cell array 110 is mechanically connected to the gantry 120!
  • the "solar cell panel” is a concept representing a unit for taking out the electric power generated by the solar cell module. Therefore, in FIG. 2, since the solar cell module string 111 is a unit for taking out the electric power generated by the solar cell module, a wiring 150 to the power conditioner 112 is provided for each solar cell module string 111.
  • solar cell module string 111 itself is the same as that of solar cell module string 11 described with reference to FIG. 1, and therefore will not be repeated here.
  • FIG. 1 in FIG. 2, at least three solar cell module strings 111 are provided in the solar cell array 110, and three wires 150 are connected to the power conditioner 112. Note that the number of solar cell module strings 111 is not limited to three, and may be four or more or one.
  • external switch 104 is provided for each wiring 150 at the end on the solar cell module string 111 side.
  • the external switch 104 is attached to the gantry 120, for example.
  • the external switch 104 will be described later in detail.
  • the observation amount and A sensor for comparison with a predetermined amount is provided.
  • the possibility of an electric shock or electric leakage due to disconnection of the power supply line (wiring 150) from the solar cell module string 111 is hereinafter referred to as “danger”.
  • At least one danger detection sensor is provided. This danger detection sensor may be provided outside the power conditioner 112 or may be provided inside. It is also possible to provide one or more danger detection sensors on the outside and inside of the inverter 112, respectively.
  • sensors installed outside the power conditioner 112 include the following. i) As a sensor for detecting water damage, for example, a sensor installed at a position lower than the position where the power conditioner 112 is installed in a house, etc., and detecting the presence or absence of inundation, ii) For detecting a fire As a sensor, for example, a sensor that is installed at a position higher than the position where the power conditioner 112 is installed and detects the presence or absence of ignition based on the amount of smoke. Examples of sensors installed in the power conditioner 112 include the following.
  • two sensors a first sensor 117a and a second sensor 117b
  • the first sensor 117a is provided, for example, outside the power conditioner 112, and compares the observed amount with a predetermined amount.
  • an abnormal event such as a natural disaster is detected.
  • the second sensor 117b is installed in the power conditioner 112, for example, and compares the observation amount with a predetermined amount.
  • an abnormal state in the power conditioner 112 is detected.
  • the danger detection sensor detects the danger, that is, the observation amount is, for example, a predetermined amount. When it exceeds, an abnormal signal is transmitted to the control circuit 116 described later. In addition, when it is detected that the danger has been released, that is, when the observation amount becomes, for example, a predetermined amount or less, a danger release signal is transmitted. When danger is detected, an abnormal signal may be continuously transmitted every predetermined period. In this case, the control circuit 116, which will be described later, determines that the danger has been released when the abnormal signal is not received.
  • the power conditioner 112 converts the internal switch 114 for cutting off the power from the solar cell module string 111 and the DC power from the solar cell module string 111 into predetermined power that can be supplied to the load 140.
  • Power converter 130 for controlling the control circuit 116 and a control circuit 116 for performing various controls.
  • the internal switch 114 corresponds to the switch 14 in FIG. Similarly to the switch 14, the internal switch 114 is opened / closed by, for example, constant voltage control by the control circuit 116.
  • the control circuit 116 includes a microcomputer, a memory 131 such as a FLASH-ROM, a DSP (Digital Signal
  • the microcomputer controls the operation of the power conditioner 112 by using various execution programs stored in the memory 131 in advance.
  • the control circuit 116 controls conduction / non-conduction of the external switch 104 based on signals from the danger detection sensors, for example, the first sensor 117a and the second sensor 117b.
  • the external switch 104 is reversibly turned on and off by the control circuit 116.
  • reversibly conducting Z non-conducting means that conduction and non-conduction can be repeatedly controlled by a control signal from the control circuit 116 based on the signal of the danger detection sensor force. .
  • "irreversibly non-conductive” means that once a non-conductive state is established by a control signal from the control circuit 116 based on the signal of the danger detection sensor force, the non-conductive state is set to a conductive state unless there is a special operation. Means not to return.
  • the original state cannot be restored without manual intervention. Even without human intervention, the signal may be restored only by a special signal having a predetermined pattern rather than a simple signal that constantly enters a state such as HighZLow. .
  • the external switch 104 is, for example, reversibly conductive Z non-conductive.
  • a relay for switching to a state and a circuit protector for irreversibly to be turned off are connected in series.
  • the relay can be turned on and off by a control signal (electric signal) from the control circuit 116.
  • the circuit protector is turned off by the trip circuit in response to a control signal from the control circuit 116. And once switched to the non-conducting state, a switching operation of a mechanical mechanism such as manual intervention is required to make the conducting state.
  • Non-conducting is mechanical non-conducting.
  • the configuration of the external switch 104 is not limited to the configuration described above, and any configuration that can reversibly and irreversibly open and close the connection may be used. For example, it may be a switching circuit using a 1S FET (field-effect transistor) using a relay to reversibly be turned on and off. / ⁇ .
  • the external switch 104 may be one that can be opened / closed only irreversibly (mechanically), or may be one that can be opened / closed only reversibly (electrically). .
  • the memory 131 has a first flag Fa that is set when the external switch 104 is electrically non-conductive, and is set when the external switch 104 is mechanically non-conductive.
  • the second flag Fb to be stored is stored.
  • the first sensor 117a and the second sensor 117b are connected to the control circuit 116 via the signal line 170. Note that the signal may not be transmitted via the signal line 170 but may be transmitted wirelessly.
  • the control circuit 116 transmits a control signal to the external switch 104 via the signal line 160, and controls the conduction / non-conduction of the external switch 104. As a result, it is possible to cut off or connect the input of electric power from the solar cell module string 111. Note that the signal may not be transmitted via the signal line 160 but may be transmitted wirelessly.
  • the power conversion unit 130 may be a DC-DC power converter or a DC-AC converter.
  • the photovoltaic power generation apparatus 1000 according to the first embodiment of the present invention shows an independent power supply system connected to the load 140. It may be an interconnected system.
  • the safety measure operation of the photovoltaic power generation apparatus 1000 when two risk detection sensors, that is, the first sensor 117a and the second sensor 117b are provided will be described using a flowchart. To do.
  • the output from the solar cell module string 111 is cut off by the external switch 104 installed in the vicinity of the solar cell module string 111.
  • the external switch can be reversibly turned off and safety measures can be taken.
  • control circuit 116 determines whether or not there is an abnormal signal from the second sensor 117b (step S108). If control circuit 116 determines that there is no abnormal signal from second sensor 117b (NO in step S108), control circuit 116 proceeds to step S114. In step S114, the control circuit 116 further determines whether or not there is an abnormal signal from the first sensor 117a. If it is determined that there is an abnormal signal from the first sensor 117a (YES in step S114), the process returns to step S108 again to determine whether or not there is an abnormal signal from the second sensor 117b.
  • the control circuit 116 mechanically turns off the external switch 104 (step S112).
  • the solar cell array 10 is not damaged, power generation may be performed as usual. Then, the electric power input to the flooded power conditioner 12 causes troubles such as short circuit or electric shock due to electric leakage.
  • the power conditioner 12 appears to be free of damage.
  • the circuit board of the power conditioner 12 that has been submerged in water may have residual moisture or suspended dust or dirt. Doing so will cause electric shock problems due to short circuits and leakage.
  • the first sensor 117a is the first sensor 117a outside the power conditioner 112, for example, about 10 cm below the position where the housing is installed. Install a submergence sensor.
  • the first sensor 117a monitors the water level below the power conditioner 112.
  • the first sensor 117a transmits an abnormal signal to the control circuit 116 when the water reaches the installation position.
  • the first sensor 117a is It is assumed that an abnormal signal is not transmitted only when water is strong, such as at times.
  • a second submersion sensor is installed inside the power conditioner 112, for example, at the bottom inside the casing.
  • the second sensor 117b monitors the presence or absence of water in the power conditioner 112 main body.
  • the second sensor 117b is installed at least below the control circuit 116 inside the power conditioner 112. Therefore, the abnormal signal is transmitted to the control circuit 116 by the second sensor 117b before the control circuit 116 is submerged.
  • the first sensor (first submergence sensor) 117a attached to the lower portion of the power conditioner 112 is detected by the inundation due to the increased water, and the inundation risk of the power conditioner 112 is detected.
  • the first sensor 117a transmits an abnormal signal to the control circuit 116 when the set water level is reached (YES in step S102).
  • the control circuit 116 sets the first flag Fa indicating “there is a risk of flooding” in the memory 131 (step S104), and makes the external switch 104 electrically non-conductive (step S106).
  • the presence or absence of water in the power conditioner 112 is detected by a second sensor (second water immersion sensor) 117b attached to the inner bottom of the power conditioner 112.
  • the second sensor 117b transmits an abnormality signal to the control circuit 116 when the power conditioner 112 is submerged (YES in step S108).
  • the control circuit 116 sets the second flag Fb indicating “with water” in the memory 131 (step S110).
  • the external switch 104 is mechanically turned off (step S112).
  • the external switch 104 when the first flag Fa with the risk of flooding and the second flag Fb with the flooding are set, the external switch 104 Is mechanically turned off. Therefore, even if the control circuit 116 in the power conditioner 112 breaks down and a control signal for connecting the external switch 104 is transmitted, the control circuit 116 is not connected unless manually, and safety is improved. [0083] Further, as in Case 1, even if the weather recovers while the inverter 112 is flooded, the external switch 104 is installed in the vicinity of the solar cell module string 111. The power output is cut off in the vicinity of the battery module string 111. Therefore, even if the weather recovers with the inverter 112 submerged, the wiring 150 is not energized. As a result, it is possible to prevent electric shock or electric leakage at the input terminal portion of the power conditioner 112.
  • the external switch 104 is mechanically turned off. Therefore, as in case 2, even if the water level subsequently drops and the abnormal signal is released from the second sensor 117b or the first sensor 117a, the connection is not made by the control from the control circuit 116. As a result, even if residual moisture or suspended dust or dirt adheres to the circuit board after being immersed in water, the input of power from the solar cell module string 111 to the power conditioner 112 is cut off. Therefore, it is possible to prevent a short circuit or a leakage of the circuit.
  • the external switch 104 since the external switch 104 is installed in the vicinity of the solar cell module string 111, the output of electric power is cut off in the vicinity of the solar cell module string 111. Therefore, even if water is pulled after the inverter 112 is submerged as in Case 2, the wiring 150 is not energized. As a result, even though the power conditioner 112 is activated, damage due to energization on the input terminal of the power conditioner 112, for example, poor insulation of the wiring 150 due to floating woods or a flying typhoon during flooding There will be no electrical leakage due to electrical shocks caused by the above, or poor insulation due to dirt inside the inverter 112.
  • the risk of inundation is detected by the first sensor 117a attached to the lower part of the inverter 112 due to inundation due to increased water.
  • the first sensor 117a transmits an abnormal signal to the control circuit 116 when the preset water level is reached (YES in step S102).
  • the control circuit 116 sets the first flag Fa at risk of flooding in the memory 131 (step S104), and makes the external switch 104 electrically non-conductive (step S106).
  • the control circuit is turned on when the first sensor 117a determines that the water immersion is below the preset water level. An abnormal signal is released, such as a danger release signal is sent to the road 116 (NO in step S114).
  • the first flag Fa with the water immersion risk is withdrawn from the memory 131 by the control circuit 116 (step S116). Then, the external switch 104 is electrically connected and returned to the conductive state (step S 118).
  • the power conditioner 112 itself has not been submerged. Therefore, when the danger of submersion of the power conditioner 112 is released (the abnormal signal from the first sensor 117a is released).
  • the external switch 104 is reversibly returned to the conductive state. Accordingly, when the weather recovers, power is supplied from the solar cell module string 111 to the power conditioner 112.
  • case 3 when the photovoltaic power generation apparatus 1000 performs a self-sustained operation after the weather recovers, it is preferable to perform the following in order to supply power safely.
  • power can be supplied only to the outlet located above the inverter 112
  • the system is divided by a distribution board (not shown).
  • the weather recovers it is preferable to close only the breaker connected to the outlet located above the power conditioner 112.
  • a breaker such as a distribution board (not shown) may be dropped when the first sensor 117a detects the danger of flooding.
  • the external switch 104 is turned on when the abnormal signal is canceled by the first sensor 117a as the water level decreases.
  • the first sensor 117a may be installed, for example, about 10 cm below the outlet installed in advance at the lowest position in the home. It is also possible to monitor the water level below the inverter 112 by attaching the first sensor 117a to the back of the floor of the house.
  • the power conditioner 12 may be partially disconnected from the power wiring 50 that is fixed to the wall of the house. In such a case, problems such as electric shock occur.
  • a seismic intensity sensor is installed outside power conditioner 112, for example, in an arbitrary part of a house.
  • a seismic intensity sensor is installed in the power conditioner 112 itself.
  • This first sensor 117a monitors the intensity of the inverter 112.
  • an abnormal signal is transmitted to the control circuit 116.
  • the seismic intensity at which the abnormal signal is transmitted to the first sensor 117a may be set in advance by the user or may be set in advance on the apparatus side.
  • an inclination sensor is installed in the power conditioner 112 itself.
  • the second sensor 117b monitors the damage of the inverter 112 due to an earthquake or the like, for example, the state of tilting or falling.
  • This tilt sensor may be fixed in the power conditioner 112! /, Or may be attached to the outer periphery of the power conditioner 112.
  • the first sensor (seismic intensity sensor) 117a detects an earthquake. Thereby, the first sensor 117a transmits an abnormal signal to the control circuit 116 when the seismic intensity set in advance is reached (YES in step S102). In response to the signal from the first sensor 117a, the control circuit 116 sets a first flag Fa indicating “there is an earthquake” in the memory 131 (step S104). Then, the external switch 104 is set in an electrically nonconductive state (step S106).
  • the second sensor (inclination sensor) 117b attached to the inside of the power conditioner 112.
  • the second sensor 117b transmits an abnormal signal to the control circuit 116 when the power conditioner 112 is tilted (YES in step S108).
  • the control circuit 116 sets the “inclined” second flag Fb in the memory 131 (step S110).
  • the external switch 104 is mechanically turned off (step S). 112).
  • the external switch 104 is Mechanically turn off.
  • the abnormal signal is canceled by the first sensor 117a and Z or the second sensor 117b, it is not connected unless it is manually operated, and safety is improved.
  • Step S112 is the same as Case 4 above.
  • the external switch 104 is installed in the vicinity of the solar cell module string 111, the output from the solar cell module string 111 is output to the solar cell when the house is inclined after the earthquake as in Case 5. Can be shut off near module string 111. Therefore, even when the weather recovers or when there is sunlight, the wiring 150 is not energized.
  • step S106 an earthquake is first detected by the first sensor 117a.
  • the first sensor 117a transmits an abnormal signal to the control circuit 116 when the seismic intensity set in advance is reached (YES in step S102).
  • the control circuit 116 sets the first flag Fa with an earthquake in the memory 131 (step S104), and makes the external switch 104 electrically non-conductive (step S106).
  • the presence or absence of the inclination of the power conditioner 112 is detected by the second sensor 117b attached to the inside of the power conditioner 112.
  • the power conditioner 112 does not tilt, so an abnormal signal to the control circuit 116 is not transmitted (NO in step S108). Therefore, the inclined second flag Fb cannot be set in the memory 131.
  • the control circuit 116 is in danger when the first sensor 117a determines that the seismic intensity is lower than the set seismic intensity. An abnormal signal is released, such as when a release signal is sent (NO in step S114). In this way, the first flag Fa with earthquake is withdrawn from the memory 131 by the control circuit 116 only when the second flag Fb with inclination is not set in the memory 131 (step S116). Then, the external switch 104 is electrically connected and returned to the conductive state (step S118).
  • the solar power generation device 1000 performs a self-supporting operation after the external switch 104 is reversibly returned to the conductive state as in the case 6, the following is performed. It is preferable to keep it. For example, it is preferable to supply power as an emergency power source only to the outlet (not shown) attached to the main body of the power conditioner 112. By doing so, it is possible to prevent the occurrence of electrical leakage due to the failure of the power line between the electrical product and the distribution panel power outlet due to the earthquake.
  • a breaker such as a distribution board (not shown) may be dropped when an earthquake is detected by the first sensor 117a.
  • the external switch 104 is turned on when the abnormal signal is released by the first sensor 117a. Is done.
  • the first sensor 117a can be installed at a high place near the roof of the house to monitor the fluctuation of the solar cell module string 111 against an earthquake.
  • a smoke sensor is installed outside the power conditioner 112, for example, an arbitrary part of a house, as the first sensor 117a. It is desirable that the smoke sensor be provided above the position where the power conditioner 112 is installed in order to easily detect smoke.
  • the first sensor 117a which is a smoke sensor, may be installed on the outer periphery of the power conditioner 112 itself. Moreover, it does not have to be a smoke sensor. It only needs to be able to detect a fire near the inverter 112. This first sensor 117a monitors the presence or absence of a fire hazard in the inverter 112 by smoke. When a fire is detected, an abnormal signal is transmitted to the control circuit 116.
  • a temperature sensor is installed in the inverter 112 as the second sensor 117b. To do.
  • the second sensor 117b monitors whether the power conditioner 112 is damaged by a fire or the like, for example, based on whether or not the temperature is higher than a preset temperature. Note that it is not necessary to detect a fire of the inverter 112 according to the temperature.
  • the first sensor (smoke sensor) 117a detects smoke due to a fire. Thereby, the first sensor 117a transmits an abnormal signal to the control circuit 116 when the smoke amount reaches a preset level (YES in step S102). In response to the signal from the first sensor 117a, the control circuit 116 sets the first flag Fa indicating “fire” in the memory 131 (step S104). Then, the external switch 104 is set in an electrically nonconductive state (step S106).
  • the temperature in the power conditioner 112 is detected by the second sensor (temperature sensor) 117b attached to the inside of the power conditioner 112.
  • the second sensor 117b transmits an abnormal signal to the control circuit 116 when the temperature in the power conditioner 112 reaches the set temperature (YES in step S108).
  • the control circuit 116 sets the second flag Fb “with heating” in the memory 131 (step S110).
  • the external switch 104 is mechanically turned off (step S112).
  • the external switch 104 is installed. Mechanically turn off. As a result, even if the abnormal signal is canceled by the first sensor 117a and Z or the second sensor 117b, it is not connected unless it is manually operated, and safety is improved.
  • the external switch 104 is installed in the vicinity of the solar cell module string 111, even when the weather recovers or when the sun is shining, the power is output in the vicinity of the solar cell module string 111. Is cut off. Accordingly, the wiring 150 is not energized when the power conditioner 112 is burned or the wiring 150 is disconnected as in the case 7. As a result, electric shock or leakage at the input terminal of the inverter 112 Electricity can be prevented.
  • step S108 when the inverter 112 itself is heated by a fire (YES in step S108), the same as case 7 above until the external switch 104 is mechanically turned off (step S112). It is.
  • the external switch 104 is mechanically turned off, so that the weather can be recovered and the sunshine can be emitted regardless of whether the abnormal signal from the second sensor 117b and the first sensor 117a is released. In such a case, power is not supplied to the power conditioner 112.
  • the external switch 104 is installed near the solar cell module string 111, as in Case 8, after the fire, the power conditioner 112 was burned, but the wiring 150 was not broken. In this case, the output from the solar cell module string 111 can be shut off in the vicinity of the solar cell module string 111. Therefore, even if the weather recovers or when there is sunlight, the wiring 150 is not energized.
  • a fire is first detected by the first sensor 117a.
  • the first sensor 117a transmits an abnormal signal to the control circuit 116 when the amount of smoke reaches a preset level (YES in step S102).
  • the control circuit 116 sets the first flag Fa with a fire in the memory 131 (step S104), and electrically disconnects the external switch 104.
  • the conduction state is set (step S106).
  • step S114 When the second flag Fb with heating is not set in the memory 131, when the first sensor 117a determines that the smoke level is lower than the set smoke level, the control circuit 116 is reached. An abnormal signal is released, such as a danger release signal is sent (NO in step S114). As described above, only when the second flag Fb with heating is not set in the memory 131, the first flag Fa with fire is removed from the memory 131 by the control circuit 116 (step S116). Then, the external switch 104 is electrically connected and returned to the conductive state (step S 118).
  • the external switch 104 is reversibly returned to the conductive state as in the case 9, when the photovoltaic power generation device 1000 performs a self-sustaining operation, in order to supply power safely, the following is performed. It is preferable to keep it. For example, it is preferable to supply power as an emergency power source only to the outlet (not shown) attached to the main body of the power conditioner 112. By doing so, it is possible to prevent leakage due to a failure of the power line between the electrical product and the distribution panel power outlet due to a fire.
  • a breaker such as a distribution board (not shown) may be dropped when a fire is detected by the first sensor 117a. If the damage of the power conditioner 112 itself is not detected by the second sensor 117b as in the case 9, the external switch 104 is turned on when the abnormal signal is canceled by the first sensor 117a. But not shown It is desirable to supply the power to the outlet in the house, which is the load 140 side of the distribution board, by manually raising the breaker after confirming safety. By doing so, for example, it is possible to prevent power from being supplied in a state where the outlet of the room is in a fire. Thereby, safety can be improved.
  • the smoke sensor as the first sensor 117a may be used in combination with a generally installed fire alarm. Thereby, you may monitor the ignition with respect to the whole house.
  • the photovoltaic power generation apparatus 1000 includes a plurality of sensors that have more than a force that detects the risk of a predetermined disaster using the two sensors (first sensor 117a and second sensor 117b). It is preferable to provide a type. In this way, it is possible to take further safety measures.
  • the wiring 150 connected to the external switch 104 is preferably structured to be disconnected from the solar cell module string 111 due to mechanical stress from the outside. Such a structure will be described with reference to FIGS. 4 and 5.
  • FIG. 4 See FIG. 4
  • FIG. 4 is a diagram showing an example of an installation state of the solar cell module string 111 in a normal state.
  • solar cell module 101 (101a, 101b) is fixed by module frame 102.
  • the solar cell module 101a and the solar cell module 101b are electrically connected by a module wiring 152 to constitute a solar cell module string 111.
  • the solar cell module string 111 is mechanically fixed to the gantry 120 with a fastener 122 such as a screw.
  • the external switch 104 is fixed to the gantry 120.
  • the external switch 104 may be fixed to the module frame 102.
  • the wiring 150 connected to the power conditioner 112 and the connector 151 with the terminal portion not exposed are electrically connected to the external switch 104.
  • This connector 151 is connected to the solar cell module string 111 (solar cell module 101a constituting the solar cell module string 111).
  • the solar cell module string 111 is as shown in FIG.
  • FIG. 5 is a diagram showing a situation where the solar cell module 101 is disconnected from the installation base 120.
  • control circuit 116 may detect a change in impedance, or may detect a change (presence / absence) of a current value by passing a constant current. In addition, these detection methods may be performed periodically or intermittently.
  • FIG. 6 is a block diagram of solar power generation device 2000 according to a modification of the first embodiment.
  • Photovoltaic power generation device 2000 according to the modification of the first embodiment performs the same safety measure operation as that of the first embodiment. Therefore, the description of the flow of safety measures operation will not be repeated.
  • the photovoltaic power generation apparatus 2000 in the modification of the first embodiment is different in hardware configuration from the photovoltaic power generation apparatus 1000 in the first embodiment. Therefore, the different configurations are described below. Note that the same reference numerals are used for the same configuration as the photovoltaic power generation apparatus 1000 in Embodiment 1, and the description thereof is not repeated here.
  • solar power generation device 2000 in the modification of the first embodiment performs grid interconnection operation linked to grid power source 201.
  • a junction box 119 is provided between the inverter 112 and the conditioner 112.
  • the connection box 119 collects the wiring 150 provided for each solar cell module string 111 and supplies power to the power conditioner 112.
  • the node conditioner 112 shows an input terminal 113 for inputting power from the connection box 119 and an output terminal 200 for outputting power to the system power supply 201.
  • the power converter 130 includes a direct current (DC) ZDC converter 132 for boosting DC power and an inverter 118 for converting DC power to AC power.
  • DC direct current
  • An internal switch 114 is provided between the input terminal 113 and the DCZDC converter 132.
  • An output switch 124 is provided between the inverter 118 and the output terminal 200.
  • This output switch 124 corresponds to a general earth leakage breaker, and is brought into a non-conducting state when an earth leakage occurs in the power conditioner 112. This prevents leakage to the outside.
  • the input terminal 113 is provided with a thermal fuse 107 for detecting an abnormality such as a temperature rise caused by a connection failure in the input terminal 113.
  • the control circuit 116 makes the internal switch 114 non-conductive. Thereby, the input of electric power from the solar cell module string 111 is cut off.
  • the modification of the first embodiment includes a backup power supply circuit 204.
  • the backup power supply circuit 204 can supply power to the control circuit 116.
  • the series of processes described in the first embodiment can be performed.
  • the constant power generated by solar power generation during sunshine may be temporarily stored in the capacitor that is the backup power supply circuit 204. Then, it is possible to confirm the state of the photovoltaic power generator 2000 in the control circuit 116 and determine whether there is an abnormality. At this time, if power is supplied to the control circuit 116 by charging the knock-up power supply circuit 204, it is preferable to first transmit a signal for making the external switch 104 non-conductive from the control circuit 116. The power supply from the solar cell module string 111 to the power converter 130 is cut off at the solar cell module string 111 side until it can be determined whether there is an abnormality. It is preferable to do this.
  • the power storage unit of the backup power supply circuit 204 may be formed of a secondary battery such as a lead storage battery.
  • connection box 119 due to a natural disaster, the external switch 104 may be opened and closed.

Abstract

L'invention concerne un dispositif de génération d'énergie photovoltaïque qui est muni d'une chaîne de modules de cellules solaires (111) qui inclut une pluralité de modules de cellules solaires destinés à recevoir la lumière solaire et à générer de l'énergie, un ou plusieurs câblages (150) destinés à prélever l'énergie en courant continu de la chaîne de modules de cellules solaires (111), une section de conversion d'énergie (130) destinée à convertir l'énergie en courant continu obtenue par l'intermédiaire du câblage (150) en une énergie prescrite qui peut être fournie en sortie, un commutateur extérieur (104) prévu pour chaque câblage (150) afin d'interrompre l'énergie en courant continu provenant de la chaîne de modules de cellules solaires (111), des capteurs (117a, b) destinés à comparer une quantité surveillée à une quantité spécifiée au préalable et un circuit de commande (116) destiné à commander la continuité/non continuité du commutateur extérieur (104) sur la base d'un signal provenant des capteurs (117a, b).
PCT/JP2006/300993 2005-02-02 2006-01-24 Dispositif de generation d'energie photovoltaique et controleur de connexion WO2006082727A1 (fr)

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JP2005026252A JP4703202B2 (ja) 2005-02-02 2005-02-02 太陽光発電装置および接続制御装置
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ITMI20110982A1 (it) * 2011-05-30 2012-12-01 Energy Engineering S R L Dispositivo di sicurezza per un impianto fotovoltaico
EP2461456B1 (fr) * 2010-12-03 2014-07-02 ABB Oy Conversion CA de tension CC variable tel qu'une alimentation solaire
JP2014132823A (ja) * 2009-11-06 2014-07-17 Panasonic Corp 配電システム
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JP2014132823A (ja) * 2009-11-06 2014-07-17 Panasonic Corp 配電システム
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EP3557725A1 (fr) * 2018-04-18 2019-10-23 Beijing Hanergy Solar Power Investment Co., Ltd. Dispositif, système et procédé de commande de marche/arrêt de module solaire

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