WO2007125867A1 - 太陽光発電システムおよび太陽光発電システム制御方法 - Google Patents
太陽光発電システムおよび太陽光発電システム制御方法 Download PDFInfo
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- WO2007125867A1 WO2007125867A1 PCT/JP2007/058741 JP2007058741W WO2007125867A1 WO 2007125867 A1 WO2007125867 A1 WO 2007125867A1 JP 2007058741 W JP2007058741 W JP 2007058741W WO 2007125867 A1 WO2007125867 A1 WO 2007125867A1
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- power generation
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- solar
- photovoltaic power
- photovoltaic
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- 238000010248 power generation Methods 0.000 title claims abstract description 559
- 238000000034 method Methods 0.000 title claims description 71
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- 230000005856 abnormality Effects 0.000 claims description 73
- 230000005855 radiation Effects 0.000 claims description 44
- 238000001514 detection method Methods 0.000 claims description 34
- 238000004891 communication Methods 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 31
- 230000008569 process Effects 0.000 description 26
- 238000009434 installation Methods 0.000 description 15
- 238000012423 maintenance Methods 0.000 description 10
- 239000008186 active pharmaceutical agent Substances 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000010485 coping Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 241000112598 Pseudoblennius percoides Species 0.000 description 1
- 102000006463 Talin Human genes 0.000 description 1
- 108010083809 Talin Proteins 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/20—Arrangements for controlling solar heat collectors for tracking
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/10—Supporting structures directly fixed to the ground
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/10—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
- F24S30/45—Arrangements for moving or orienting solar heat collector modules for rotary movement with two rotation axes
- F24S30/452—Vertical primary axis
-
- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
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- 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
Definitions
- the present invention relates to a solar power generation system configured by arranging a plurality of solar power generation units having a solar cell module and a tracking drive unit, and a solar power generation system control method.
- the solar power generation system is desired to be low-cost for further spread, and as one of them, the solar cell module is provided with a tracking drive unit that tracks sunlight and directs the solar cell module to the solar direction and altitude.
- a photovoltaic power generation system has been proposed that improves power generation and reduces power generation cost per unit power generation.
- solar cell module the amount of solar cells, which are the most expensive components in a solar power generation system (solar cell module), is generated by collecting the incident sunlight and collecting power by tracking the sun. Concentrating solar power generation systems that reduce the overall cost of solar power generation systems are also being developed.
- These photovoltaic power generation systems can be connected to the electric power system for the purpose of serving as a supplementary power plant for supplying power to undeveloped areas and urban areas in the mountains.
- a solar power generation system connected to a power converter (a conditioner).
- Patent Document 1 discloses a method for tracking the sun by detecting the direction of the sun using a solar position sensor.
- Patent Document 2 the azimuth and altitude of the sun are calculated based on the latitude 'longitude and date' time of the place where the photovoltaic power generation system is installed, and the light receiving surface of the solar cell module is set in that direction.
- a method of directing is disclosed.
- Patent Document 3 detects the direction of the sun from the output of an optical sensor, and A method for orienting the light-receiving surface of the positive battery module to the solar orientation 'altitude' is disclosed.
- the solar light is collected by a lens and irradiated to the solar cell, so the only difference is that high accuracy is required for solar tracking where the allowable angle of tracking deviation is small.
- the basic solar tracking operation is the same as that of a non-concentrating solar power generation system.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-196126
- Patent Document 2 Japanese Patent Laid-Open No. 2002-202817
- Patent Document 3 Japanese Patent Application Laid-Open No. 2004-153202
- a photovoltaic power generation system As a photovoltaic power generation system, a plurality of photovoltaic power generation unit units (solar cell module and tracking drive unit are the basic components) are installed in a vast location, and deployed as a facility for generating large power Is considered.
- most of the proposals have been made on the configuration of the photovoltaic power generation system in the case of installing a plurality of photovoltaic power generation units and how to specifically configure the photovoltaic power generation system control method.
- each photovoltaic power generation unit is driven while individually tracking the sun.
- any solar power generation unit unit When the output is small for reasons such as tracking shift, there is a problem that it is necessary to detect which solar power generation unit it is and correct the malfunction.
- Patent Documents 1 to 3 that is, conventional solar power generation systems are disclosed in Patent Documents 1 to 3. It is related to control with a single photovoltaic power generation unit. Moreover, as a solar power generation system, a solar power generation system including a power conditioner (electric power conversion device) so that it can be connected to an electric power system has not yet been proposed.
- a power conditioner electric power conversion device
- the present invention has been made in view of such a situation, and is a solar power generation system in which a plurality of solar power generation unit units are arranged to form a power generation unit unit group. It is an object of the present invention to provide a photovoltaic power generation system and a photovoltaic power generation system control method capable of coping with a photovoltaic power generation unit unit that has caused an abnormal power generation by detecting the power generation state of the installation unit.
- the present invention can detect power generation abnormality easily and reliably in real time and easily correct the power generation abnormality, so that it is easy to link with the power system, and is a safe and stable solar power generation system and Another object is to provide a solar power generation system control method.
- the present invention is a photovoltaic power generation system configured by arranging a plurality of power generation device unit groups, and by detecting the power generation state of the power generation device unit group, the power generation device unit group in which power generation abnormality has occurred. Another object is to provide a solar power generation system and a solar power generation system control method capable of coping with the problem.
- the present invention provides a solar power generation system capable of detecting a power generation abnormality of a solar power generation device unit by providing a direct solar radiation meter in the solar power generation device unit constituting the power generation device unit group. Another object is to provide a method for controlling a solar power generation system.
- the present invention uses a terminal that controls the unit group current collection control unit by communicating with the unit group current collection control unit that collects the generated power of the power generation unit group and controls the tracking drive.
- a terminal that controls the unit group current collection control unit by communicating with the unit group current collection control unit that collects the generated power of the power generation unit group and controls the tracking drive.
- a photovoltaic power generation system includes a photovoltaic device unit group configured by arranging a plurality of photovoltaic power generation units having a photovoltaic module and a tracking drive unit that tracks and drives the photovoltaic module, A unit group current collection control unit that collects and controls the generated power of the power generation unit group, and the generated power collected by the unit group current collection control unit
- a photovoltaic power generation system comprising a power conversion device for converting, comprising: a unit state detection unit that detects a power generation state of each of the photovoltaic power generation unit units, wherein the output of the unit state detection unit is the unit group current collection control It is characterized by being supplied to a part.
- the unit cable of the power generator unit group force is converged by the unit group power collection control unit disposed near the power generator unit group, and the collected power is collectively converted into a power converter using a single cable. Therefore, the wiring route can be made simple and shortest, and the installation position of the power converter can be easily selected.
- the power generation abnormality in the solar power generation unit is corrected and the solar power generation unit (solar power generation System power generation can be prevented from lowering.
- it is possible to easily correct the power generation abnormality it is possible to make a photovoltaic power generation system that is easy to link with the power system and that is safe and stable.
- the unit group power collection control unit includes the unit state detection unit, and is configured to control the tracking drive unit.
- the unit group current collection control unit can detect the power generation state of each photovoltaic power generation unit and control the tracking drive unit.
- each photovoltaic power generation unit includes a distributed control unit that controls a tracking drive unit in units of photovoltaic power generation units, and the unit group current collection control unit is And communicating with the distributed control unit.
- the unit group current collection control unit and the distributed control unit can be individually controlled. Therefore, even after the solar power generation system is operated, repair of the solar power generation device unit in which power generation abnormality has occurred is repaired. This makes it easier to respond on-site during maintenance and maintenance, and to improve the efficiency of maintenance work.
- the decentralized control unit can be individually controlled, the operation of the control system Z detection system can be easily confirmed on a unit basis.
- the dispersion control unit includes the unit state detection unit. [0024] With this configuration, it becomes possible to control the tracking drive unit by detecting the power generation state of each of the photovoltaic power generation unit units by the dispersion control unit.
- the unit state detection unit detects an output current of each of the solar power generation device units.
- a plurality of power generator unit groups and a plurality of unit group power collection control units are arranged, and a group state detection unit that detects a power generation state of each of the plurality of power generator unit groups. It is characterized by providing.
- the photovoltaic power generation system according to the present invention is characterized in that at least one of the photovoltaic power generation device units constituting the power generation device unit group is provided with a direct solar radiation meter.
- the photovoltaic power generation system includes a system management control unit that integrally manages and controls the plurality of power generation device unit groups and the unit group power collection control unit arranged,
- a unit identification signal for identifying a photovoltaic power generation unit having a power generation abnormality identified based on the power generation state detected by the unit state detection unit via the unit group power collection control unit is transmitted to the system management control unit, and The system management control unit is configured to correct the tracking deviation of the identified solar power generation unit via the unit group current collection control unit.
- a plurality of solar power generation unit units having a solar cell module and a tracking drive unit for tracking driving the solar cell module are arranged to form a power generation unit group.
- the tracking drive unit is controlled via a unit group current collection control unit that collects the generated power of the power generation unit group, and the generated power collected by the unit group current collection control unit is A method for controlling a photovoltaic power generation system to be converted, wherein a photovoltaic power generation unit unit that generates a power generation abnormality is identified based on a power generation state of each of the photovoltaic power generation device units via the unit group power collection control unit. And correcting the power generation abnormality of the identified solar power generation unit.
- a plurality of the power generation device unit groups and unit group power collection control units are arranged to detect a power generation state of each of the plurality of power generation device unit groups.
- a power generation device unit group that has generated a power generation abnormality is identified, and the power generation abnormality of the identified power generation device unit group is corrected.
- At least one of the solar power generation device units arranged in the power generation device unit group includes a direct solar radiation meter, and the direct solar radiation meter
- the reference generated power is calculated based on the amount of solar radiation detected by the solar power generator, the generated power of the solar power generator unit is compared with the reference generated power, and the solar power generator unit that generates the power generation abnormality is identified and specified.
- the power generation abnormality of the photovoltaic power generation unit is corrected.
- the photovoltaic power generation system control method includes a system management control unit that integrates and controls a plurality of the power generation device unit groups and the unit group power collection control unit, and the unit A unit identification signal for identifying a photovoltaic power generation unit having a power generation abnormality identified based on a power generation state detected by the unit state detection unit via a group current collection control unit is transmitted to the system management control unit, and the system The management control unit detects the tracking deviation of the identified photovoltaic power generation unit as the unit group current collection control unit. It is characterized by making it correct via.
- the tracking drive unit is controlled by controlling the unit group current collection control unit using a terminal capable of controlling the unit group current collection control unit by communication. It is characterized by controlling.
- the tracking drive unit of the photovoltaic power generation unit unit can be individually controlled, so that adjustment of tracking drive can be performed individually, and initial setting, maintenance, and the like can be easily performed. Become.
- a power generation device unit group configured by arranging a plurality of solar power generation device units, and the generated power of the power generation device unit group are collected. Since the power generation state of the solar power generation unit is detected by the unit group current collection control unit that controls the power tracking drive unit, the power generation abnormality of the solar power generation unit in which the power generation abnormality has occurred is corrected and the solar power generation device Unit (Solar power generation system
- the photovoltaic power generation system and the photovoltaic power generation system control method according to the present invention it is possible to easily detect and correct a power generation abnormality in real time. This makes it possible to produce a solar power generation system that is easy, safe and stable.
- the power generation state of the power generation device unit group is detected with respect to the plurality of power generation device unit groups and the unit group power collection control unit. Therefore, it is possible to correct the power generation abnormality of the power generation unit group that has generated power generation and to prevent the power generation unit group (solar power generation system) from reducing the generated power.
- the photovoltaic power generation device unit constituting the power generation device unit group is provided with a direct solar radiation meter, and Detecting a power generation abnormality, the sun that generated the power generation abnormality If the power generation abnormality of the photovoltaic power generation unit can be corrected to prevent a decrease in the generated power of the photovoltaic power generation unit (solar power generation system), there is an effect.
- the photovoltaic power generation apparatus unit since the terminal that communicates with the unit group power collection control unit and controls the unit group current collection control unit is used, the photovoltaic power generation apparatus unit is provided.
- the effect is that the tracking drive can be adjusted by controlling separately from the generator unit group.
- FIG. 1 is a perspective view showing an external appearance of a photovoltaic power generation unit applied to a photovoltaic power generation system according to Embodiment 1 of the present invention.
- FIG. 2 is a conceptual diagram conceptually showing the configuration of a photovoltaic power generation system when one unit group current collection control unit and one power converter are arranged in correspondence with each other.
- FIG. 3 is a conceptual diagram conceptually showing a configuration of a photovoltaic power generation system when a plurality of unit group power collection control units and one power conversion device are arranged in correspondence with each other.
- FIG. 4 is a conceptual diagram conceptually showing the configuration of the photovoltaic power generation system when the photovoltaic power generation system shown in FIG. 2 is expanded on a large scale.
- FIG. 5 is a conceptual diagram conceptually showing the configuration of the photovoltaic power generation system when the photovoltaic power generation system shown in FIG. 3 is deployed on a large scale.
- FIG. 6 is a conceptual conceptual diagram conceptually showing a configuration example of a unit group current collection control unit applied to the solar power generation system according to Embodiment 1 of the present invention.
- FIG. 7 is a flow chart showing an example of a basic flow of drive control in a solar power generation system (solar power generation unit) in the case of not detecting the power generation state.
- FIG. 8 is a flowchart showing an example of a control flow when a power generation state of a solar power generation device unit is detected in the solar power generation system according to Embodiment 2 of the present invention.
- FIG. 9 is a flowchart showing a more specific control program example of the flowchart in FIG.
- FIG. 10 is a flowchart showing an example of a control flow in the case of detecting a power generation state of a photovoltaic power generation unit in the photovoltaic power generation system according to Embodiment 2 of the present invention.
- FIG. 11 is a conceptual diagram illustrating a configuration example of a photovoltaic power generation system according to Embodiment 3 of the present invention.
- FIG. 11 is a conceptual diagram illustrating a configuration example of a photovoltaic power generation system according to Embodiment 3 of the present invention.
- FIG. 12 is a structural conceptual diagram conceptually showing a structural example of the photovoltaic power generation system according to Embodiment 4 of the present invention.
- FIG. 13 is a graph showing daily fluctuations in the amount of solar radiation irradiated to the stationary solar cell module and the amount of direct solar radiation irradiated to the tracking solar cell module.
- Fig. 14 is a conceptual diagram conceptually showing a configuration example of the photovoltaic power generation system according to Embodiment 5 of the present invention, and shows a solar power generation unit unit showing the installation status of the direct solar radiation meter. It is a schematic perspective view.
- FIG. 15 is a conceptual diagram conceptually showing a configuration example of a photovoltaic power generation system according to Embodiment 5 of the present invention, and is a schematic configuration diagram showing a schematic configuration of the photovoltaic power generation system.
- FIG. 16 is a perspective view showing an appearance of a solar power generation unit applied to the solar power generation system according to Embodiment 6 of the present invention.
- FIG. 17 is a structural conceptual diagram conceptually showing a structural example of a photovoltaic power generation system according to Embodiment 6 of the present invention.
- FIG. 18 is a structural conceptual diagram conceptually showing a structural example of a photovoltaic power generation system according to Embodiment 6 of the present invention.
- FIG. 19 is a conceptual conceptual diagram conceptually showing a configuration example of a mute group current collection control unit applied to the solar power generation system according to Embodiment 6 of the present invention.
- FIG. 20 is a configuration conceptual diagram conceptually showing a configuration example of a distributed control unit applied to the photovoltaic power generation system according to Embodiment 6 of the present invention.
- FIG. 21 is a conceptual conceptual diagram conceptually showing a structural example of a photovoltaic power generation system according to Embodiment 7 of the present invention.
- FIG. 1 is a perspective view showing an external appearance of a solar power generation unit applied to the solar power generation system according to Embodiment 1 of the present invention.
- the photovoltaic power generation unit 1 includes a solar cell module 2 and a tracking drive unit 3 as main components. That is, the solar power generation device unit 1 is configured as a tracking solar cell module.
- the solar cell module 2 is mounted with a large number of solar cells and constitutes a basic functional unit of solar power generation.
- FIG. 1 shows the solar cell module 2 as viewed from the back side.
- the solar cell module 2 is preferably a concentrating type, but is not limited thereto. In the case of the non-condensing type, the only difference is that the allowable angle of tracking angle deviation is large, and the other parts can be considered in the same way as in the case of the condensing type.
- the tracking drive unit 3 is configured to track the solar cell module 2 so that the normal direction of the light receiving surface of the solar cell module 2 is parallel to the sunlight.
- the tracking drive is preferably performed by biaxial rotation of azimuth rotation and tilt rotation.
- connection box 4 is provided on the support unit 5 that holds the solar cell module 2 and the tracking drive unit 3, and the unit cable lc is connected to the connection box 4.
- the unit cable lc is a power generation cable lcg that transmits the generated power generated by the solar cell module 2 (hereinafter sometimes simply referred to as power), and a power cable connected to a power source that drives the tracking drive unit 3 for tracking. It has a control system cable lcc that transmits and receives control system signals such as a signal for controlling the bull lcp and the tracking drive unit 3.
- FIGS. 2 to 5 are conceptual diagrams conceptually showing the configuration of the photovoltaic power generation system according to Embodiment 1 of the present invention.
- FIG. 2 shows that one unit group current collection control unit and one power conversion device are arranged in correspondence with each other. It is a conceptual diagram which shows notionally the structure of the solar power generation system in a case.
- the electric power generated by the plurality of photovoltaic power generation unit 1 is combined into one unit group current collection control unit 12, and further one unit group current collection control unit 12. 1 shows a photovoltaic power generation system 10 in a case where the power conversion device 15 has a small capacity and is supplied (transmitted) to one power conversion device 15 corresponding to the above.
- FIG. 3 is a conceptual diagram conceptually showing the configuration of the photovoltaic power generation system in the case where a plurality of unit group current collection control units and one power conversion device are arranged in correspondence with each other.
- the power generated by the plurality of photovoltaic power generation apparatus units 1 is collected into one unit group current collection control unit 12, and further, the plurality of unit group current collection control units 12 are combined.
- 1 shows a photovoltaic power generation system 10 in a case where the power conversion device 16 has a large capacity and is supplied (transmitted) to one power conversion device 16 corresponding to the above.
- the solar power generation system 10 includes a power generation device unit group 11 configured by arranging a plurality of solar power generation device units 1, and a solar power generation device unit 1 of the power generation device unit group 11 via a unit cable lc.
- a unit group current collection control unit 12 that collects the generated power of the photovoltaic power generation unit 1 connected to the power generation unit unit group 11 (the power generation power of the power generation unit group 11) and controls the tracking drive unit 3; .
- the photovoltaic power generation system 10 further collects the generated power of the power generation device group 11 collected by the unit group power collection control unit 12 through a conversion cable 12c into a single cable. Power is transmitted to the power converter 15 (power converter 16).
- the power conversion device 15 power conversion device 16
- the power converter 15 (power converter 16) is installed in the power management station 10s in order to ensure stability and safety.
- a plurality of power generation device unit groups 11 and unit group power collection control units 12 are arranged and centrally managed by the power management station 10s.
- the conversion cable 12c from the unit group power collection control unit 12 is a management personal computer (hereinafter also referred to as a management PC) in order to perform integrated control of the power generator unit group 11 and the unit group power collection control unit 12.
- Management PC 18 uses power converter 15 (power converter It is arranged in the power management station 10s together with the conversion device 16).
- each photovoltaic power generation unit 1 Power supply to each photovoltaic power generation unit 1 is performed from the power management station 10s via the conversion cable 12c, the unit group power collection control unit 12, and the unit cable lc (power cable lcp).
- the electric power generated by each photovoltaic power generation unit 1 is converted into the power conversion device 15 in the power management station 10s via the unit cable lc (generated power cable leg), the unit group current collection control unit 12, and the conversion cable 12c. (Power converter 16).
- control system cable lcc As described above, any communication method such as serial communication and parallel communication using commonly used RS232C, RS485, USB, optical communication, etc. can be used. It is also possible to use the power cable lcp as the control cable lcc with signals superimposed.
- the unit cable lc conversion cable 12c
- the power cable lcp the generated power cable leg
- the control cable lcc are not affected by each other in the same wiring path. It is desirable in terms of construction.
- the cable configuration is not limited to the example described above, and can be set as appropriate.
- the unit group current collection control unit 12 is configured to be installed as close to the solar power generation unit 1 as possible.
- the group power collection control unit 12 generates power cable legs, power cables lcp, and unit cables lc connected to each photovoltaic power generation unit 11.
- Each control cable lcc is concentrated.
- the unit group current collection control unit 12 can easily arrange and arrange the control system cables lcc and the generated power cable legs connected to each photovoltaic power generation unit unit 1, and the unit group current collection control unit 12. Can reduce the number of wires from the power management station 10s to the power management station 10s (the number of conversion cables 12c) to the minimum, simplify wiring and reduce costs, and photovoltaic power generation unit 1 (power generation unit group) Since a plurality of cables (unit cable lc) from 11) can be combined into a single conversion cable 12c to supply power to the power converter 15 (power converter 16), the generator unit group 11 and the power converter 15 (power converter 16) can be connected very neatly and simply.
- the unit group current collection control unit 12 will be described in more detail with reference to FIG.
- FIG. 4 is a conceptual diagram conceptually showing the configuration of the photovoltaic power generation system when the photovoltaic power generation system shown in FIG. 2 is deployed on a large scale.
- Fig. 5 is a conceptual diagram conceptually showing the configuration of the photovoltaic power generation system when the photovoltaic power generation system shown in Fig. 3 is deployed on a large scale.
- the basic configuration is the same as that shown in FIGS. 2 and 3, and a description thereof will be omitted as appropriate.
- an integrated unit group current collection control unit 13 that is positioned higher than a predetermined number of unit group current collection control units 12 is provided to provide an integrated cable 13c.
- the integrated unit group power collection control unit 13 is connected to the PC 18 via the management cable 10d. That is, the control calculation of the tracking drive that requires computing power is performed by the integrated unit group current collection control unit 13, and the calculation result is stored in each unit group current collection control unit 12 to reduce the cost.
- FIG. 6 is a conceptual conceptual diagram conceptually showing a configuration example of the unit group power collection control unit applied to the solar power generation system according to Embodiment 1 of the present invention.
- the unit group current collection control unit 12 includes, as a basic configuration, a solar cell output terminal block 31, a control cable terminal block 32, a backflow prevention diode 33, a current sensor 34, a data acquisition unit 35, a drive control controller 36, A driving driver 37 and a concentrating bus bar 38 are provided.
- the solar cell output terminal block 31 is connected in correspondence with the terminal to which the generated power cable leg wired from the photovoltaic power generation unit 1 is assigned a number corresponding to the photovoltaic power generation unit 1 Is done.
- the control cable terminal block 32 is connected with a control system cable lcc corresponding to the numbering in the same manner as the generated power cable 1 eg.
- appropriate power is supplied from the power management station 10s via the conversion cable 12c to ensure necessary operation.
- the power is supplied to the photovoltaic power generator unit 1 via the power cable lcp.
- the electric power (current) supplied to the solar cell output terminal block 31 is passed through the backflow prevention diode 33 to the current sensor 34 as a unit state detection unit that detects the power generation state, and the output current (power generation current) ) Is measured in real time from time to time. That is, the unit group current collection control unit 12 includes a unit state detection unit.
- the power generation state can be detected by measuring the generated power and the generated voltage in addition to the output current by using another type of sensor.
- the output current can be measured at any time by the current sensor 34, it is possible to easily and accurately detect a power generation abnormality (for example, a tracking abnormality) of the solar power generation device unit 1 in real time.
- a power generation abnormality for example, a tracking abnormality
- the output current is detected for each individual photovoltaic power generation unit 1, it is possible to easily identify the photovoltaic power generation unit 1 that has caused the power generation abnormality and easily correct the power generation abnormality.
- the measured output current is converted into data by the data acquisition unit 35 and stored in the drive control controller 36.
- the drive control controller 36 is configured to collate and store the ID code as a unit identification signal for identifying the photovoltaic power generator unit 1 and the output current.
- the tracking drive unit 3 of each photovoltaic power generation unit 1 is adjusted for tracking drive by a drive driver 37 corresponding thereto.
- the generated power from the generated power cable leg is collected by the collecting bus bar 38 and changed.
- the power is transmitted to the power management station 10s via the exchange cable 12c.
- the present embodiment relates to a flow example in the case of driving and controlling the photovoltaic power generation apparatus unit 1 in the photovoltaic power generation system 10 according to the first embodiment.
- FIG. 7 is a flow chart showing an example of a basic flow of drive control in the solar power generation system (solar power generation unit) in the case where the power generation state is not detected.
- the basic control of the flow is a unit group current collection control unit for each of the solar power generation unit units 1 arranged in the power generation unit group 11 It is executed by 12.
- the unit group current collection control unit 12 can be applied by applying a program installed in advance.
- the management PC 18 is appropriately linked as necessary.
- Step S 501
- Step S 504
- tracking drive unit 3 (referred to as drive unit on the flow chart) of one photovoltaic power generation unit 1 in power generation unit group 11 to drive and return solar cell module 2 to the tracking start position Let That is, the solar cell module 2 is directed to the starting position when the sun rises.
- step S505 NO
- step S505a After waiting for a predetermined time (step S505a), the process returns to step S505. If it is stopped ( Step S505: YES) proceeds to step S506.
- Step S 506
- step S506 NO
- step S506 YES
- step S507 It is determined whether the date and time of day rising calculated in step S502 has been reached. If it is not the daylight rising time (step S507: NO), after waiting for a predetermined time (step S507a), the process returns to step S507. If the daylight saving time is reached (step S507: YES), the process proceeds to step S508.
- Step S 508
- step S508 NO
- step S508a the time is confirmed (step S508a), and then the process returns to step S508. If the predetermined time has elapsed (step S508: YES), the process proceeds to step S509.
- All solar power generation unit 1 solar cell module 2. In the flowchart, it is assumed to be a module.) Acquire azimuth “altitude”.
- the solar direction 'altitude at that time is calculated.
- Step S513 Based on the difference between the solar azimuth calculated in step S511 'altitude and the solar power unit 1 (solar cell module 2 ) obtained in step S509 Calculates the amount of drive required to track the solar cell module 2. [0092] Step S513:
- the tracking drive unit 3 of the solar power generation unit 1 (solar battery module 2) is driven, and the solar power generation unit unit is at the solar orientation altitude calculated in step S511.
- Turn 1 (solar cell module 2).
- step S510 to step S513 the start time (the time required for the solar cell module 2 to be driven by the tracking drive unit 3 to be directed to the desired solar direction and altitude), the start interval Wait for time.
- step S515 NO
- step S515 YES
- step S516 Check if the power is sunset or not. If it is not sunset (step S516: NO), the process returns to step S508. If it is sunset (step S516: YES), the process returns to step S501.
- FIG. 8 is a flowchart showing an example of a control flow in the case of detecting the power generation state of the solar power generation unit unit in the solar power generation system according to Embodiment 2 of the present invention.
- a control flow (solar flow when adding a subroutine between step S513 and step S514 to detect the power generation state of the photovoltaic power generation unit and deal with power generation abnormality in the flow of Fig. 7 shown as a basic flow example. An example of a photovoltaic system control method) is shown.
- Step S513a
- the output current (generated current) of each photovoltaic power generator unit 1 (referred to as a unit in the flowchart) is measured by the current sensor 34.
- Step S 513b It is determined whether or not the solar power generation unit 1 having a smaller output current than the output current of the other solar power generation unit 1 is generated. If it occurs (step S51 3b: YES), the process proceeds to step S513c. If it has not occurred (step S513b: NO), the process proceeds to step S514.
- ID code unit identification signal
- the drive control controller 36 determines whether or not the photovoltaic power generation apparatus unit 1 whose output current is small is, for example, the force whose output current is continuously small ten times. If the output current is small 10 times continuously! /, (Step S513c: YES), go to Step S513d. If the output current is small continuously and less than 10 times (step S513c: NO), the process proceeds to step S514.
- the same photovoltaic power generation unit 1 is determined to have a low output current 10 times consecutively, it is identified as a power generation abnormality such as a tracking error, and the power management station 10s (Management PC18: System management) Report to the control unit).
- the notification can be made, for example, in a form in which the ID code of the photovoltaic power generator unit 1 is appropriately displayed on the display unit of the management PC 18.
- the management PC 18 can recognize (identify) the photovoltaic power generation unit 1 in which power generation abnormality has occurred, and can instruct the unit group power collection control unit 12 to execute the tracking correction program. It becomes.
- the power generation abnormality of the photovoltaic power generation unit 1 can be corrected by this execution.
- the photovoltaic power generation unit 1 (solar cell module 2) that caused the tracking shift is rotated azimuthally and tilted around both the azimuth and tilt axes, resulting in a large output current. This is done by adjusting to the position. Specifically, there are cases where it is performed manually and cases where it is performed automatically.
- the photovoltaic power generation unit 1 that caused the tracking shift is disconnected from the photovoltaic power generation system 10 and manually controlled and output. This can be done by calculating the difference between the current increasing position and the original control position and reflecting it in the initial offset value.
- disconnecting manually send a through signal to let through the solar power generation unit 1 with abnormal power generation from the basic flow (main program) of the solar power generation system 10 shown in Fig. 7. Switch. Further, when returning, a return signal for returning is sent to return.
- step S513 tilt drive unit 3 in the basic flow (main program) of the photovoltaic power generation system 10 shown in Fig. 7 is changed. Incorporate an automatic tracking correction program in the unit drive routine) based on instructions from the management PC18.
- step S513 the drive amount of the photovoltaic power generation unit 1 that has caused the tracking shift is transmitted as the tracking correction position detection drive signal for the azimuth rotation and the tilt rotation with respect to both the azimuth and tilt axes.
- the unit group current collector control unit 12 to the tracking drive unit 3 based on an instruction from the management PC 18
- the increase / decrease in the output current is measured, and the output from the normal photovoltaic power generation unit 1 Detect the position where current is equal
- the tracking deviation is corrected by reflecting the tracking correction signal obtained based on the difference between the detected position and the original control position, for example, in the initial setting value of the offset as in the case of manual operation. This can be done automatically by driving the battery module 2.
- the tracking correction program itself is not limited to the above-described method, and various methods can be adopted.
- the unit power collection control unit 12 detects the power generation abnormality and identifies the solar power generation unit 1 that has generated the power generation abnormality. Since the power generation abnormality of the solar power generation device unit 1 is corrected and the output is improved, a decrease in the generated power of the solar power generation system 10 can be reduced. Especially for power generation abnormalities due to tracking abnormalities, the tracking drive unit 3 can be controlled by the unit group current collection control unit 12 and the tracking correction program can be automatically executed, further improving efficiency. The solar power generation system 10 can be operated.
- FIG. 9 is a flowchart showing a more specific control program example of the flowchart in FIG.
- the drive signal for device unit 1 is defined as DS (k), and the rotation angle information of tracking drive unit 3 is defined as RS (k).
- the photovoltaic power generation unit 1 is represented as UT (1) to UT (50), and the drive signals DS (1) to DS (50) and the rotation angle information RS (1) to RS are associated with these. Expressed as (50).
- the basic flow photovoltaic power generation system control method
- the flow is more specific in relation to the specific number of units.
- Rotation angle information RS (1) to RS (50) of the tracking drive unit 3 for each of UT (1) to UT (50) is acquired.
- Step S605 The UT (1) to UT (50) solar cell modules 2 are oriented in the direction, and the direction is calculated based on the rotation angle information RS (1) to RS (50) of the tracking drive unit 3,
- the drive signals DS (1) to DS (50) are generated from the difference between the sun direction and altitude of the next day's ascension time obtained in S603.
- Step S606a
- Step S606c NO
- step S606d After waiting for a predetermined time (step S606d), the process returns to step S606c. If it is stopped (step S606c: YES), the process proceeds to step S606e.
- step S606e YES
- Step S606f
- Step S606b to Step S606f are repeated for all the photovoltaic power generation unit units 1, and all the photovoltaic power generation unit units 1 (UT (1) to UT (50)) are tracked.
- the tracking start position can be set by the drive unit 3 (step S606: tracking start position return step).
- step S607 It is determined whether or not the date of ascending time calculated in step S602 has been reached. If the daylight saving time has not been reached (step S607: NO), after waiting for a predetermined time (step S607a), Return to step S607. If the daylight saving time is reached (step S607: YES), the process proceeds to step S608.
- step S608 NO
- step S608a the time is confirmed (step S608a), and then the process returns to step S608. If the predetermined time has elapsed (step S608: YES), the process proceeds to step S609.
- Rotational angle information RS (k) ⁇ Based on this, calculate the azimuth 'altitude to which all photovoltaic power generator units 1 (solar cell module 2. Modules are shown in the flowchart).
- Step S610a
- the sun direction and altitude at that time are calculated.
- Step S614 Tracking drive unit 3 based on the difference between the solar azimuth and altitude calculated in step S612 and the solar power generation unit 1 (solar cell module 2 ) obtained in step S610.
- a drive signal DS (n) for driving is generated.
- the drive signal DS (n) includes a drive amount necessary for the tracking drive unit 3 to drive the solar cell module 2 for tracking.
- step S611 to step S614 the start-up time (the time required to drive the solar cell module 2 by the tracking drive unit 3 and aim at the intended solar direction and altitude), the start-up interval Wait for time.
- step S616 YES
- Step S616a
- Step S611 to Step S615 are repeated for all the photovoltaic power generation unit units 1, and each of the photovoltaic power generation unit units 1 (UT (1) to UT (50)) is tracked.
- the drive position can be set by the drive unit 3.
- step S617 NO
- step S617a After waiting for a predetermined time (step S617a), the process returns to step S617. If stopped (step S617: YES), the process proceeds to step S618.
- step S618 determines whether or not the power is sunset. If it is not sunset (step S618: NO), the process returns to step S608. If it is sunset (step S618: YES), the process returns to step S601. When sunset occurs, the sun tracking operation of UT (1) to UT (50) is stopped (step S601).
- FIG. 10 is a flowchart showing an example of a control flow in the case of detecting the power generation state of the photovoltaic power generation unit in the photovoltaic power generation system according to Embodiment 2 of the present invention, as in FIG. It is. Specifically, the control flow when the subroutine for detecting the power generation state of the solar power generation unit unit and dealing with power generation abnormality is added between step S614 and step S615 in the flow of FIG. 9 (solar power generation system Example of control method)
- Step S614a
- the output current (generated current) of each photovoltaic power generator unit 1 (referred to as a unit in the flowchart) is measured by the current sensor 34.
- the current value signal IO (n), which is the measurement result in step S614a, is transmitted from the current sensor 34 to the data acquisition unit 35.
- step S61 4c YES
- step S614d If it has not occurred (step S614c: NO), the process proceeds to step S615.
- the drive control controller 36 Stores the ID code (unit identification signal) of the photovoltaic power generator unit 1 whose output current is smaller than that of the other photovoltaic power generator unit 1.
- the comparison of the output current and the storage of the ID code can be performed by the drive control controller 36, for example.
- the drive control controller 36 determines whether or not the photovoltaic power generation apparatus unit 1 whose output current is small is, for example, the force whose output current is continuously small 10 times. If the output current is small 10 times continuously (Step S614e: YES), go to Step S614f. If the output current is small and the case is less than 10 consecutive times (step S614e: NO), the process proceeds to step S615.
- the power management station 10s (management PC 18) is notified.
- the notification can be made, for example, in such a form that the ID code of the unit is appropriately displayed on the display unit of the management PC 18 (system management control unit). In other words, in this step, it is possible to recognize (specify) the photovoltaic power generation apparatus unit 1 in which the power generation abnormality has occurred.
- the tracking drive unit 3 is caused to execute a tracking correction program for correcting the tracking shift. That is, in this step, the power generation abnormality of the photovoltaic power generation unit 1 can be corrected.
- the tracking shift can be corrected automatically or manually in accordance with the tracking correction program described with reference to FIG. 8, and the same operational effects as in FIG. 8 can be obtained.
- all units (UT (1) to UT (50): solar power generation device) are repeated by repeating a series of steps according to the flow shown in Figs.
- the drive control of the tracking drive unit 3 can be automatically performed so as to automatically eliminate the power generation abnormality of the unit 1).
- FIG. 11 is a configuration conceptual diagram conceptually showing a configuration example of the photovoltaic power generation system according to Embodiment 3 of the present invention.
- each power generation unit group 11 arranged in the solar power generation system 10 is assigned to each solar power generation unit unit by each corresponding unit group current collection control unit 12. It is configured to control 1.
- each photovoltaic power generation device unit 1 controlled by each unit group current collection control unit 12 is driven to follow by the same control method, so that the generated power in each of the multiple power generation device unit groups 11 is Almost equal It becomes.
- each power generation device unit group 11 (each unit group power collection control unit 12) There is a risk that the difference in generated power cannot be grasped.
- each unit group current collection control unit 12 (conversion cable) is used to detect the power generation state of each of the plurality of power generation device unit groups 11 arranged.
- a management PC 19 serving as a group state detection unit that detects power transmitted to the power conversion device 15 via each of them is arranged in the power management station 10s.
- the management PC 19 also functions as a system management control unit, similar to the management PC 18.
- the generated power of each power generator unit group 11 controlled by each unit group power collection control unit 12 is also the output of the power converter 15 connected to each power generator unit group 11. Therefore, the output power of the power conversion device 15 can be detected by the management PC 19 arranged in the power management station 10s.
- the management PC 19 is configured to detect an output via an output detection cable 19c connected to the output side of the power conversion device 15. With this configuration, it is possible to compare and monitor the generated power in each of the power generator unit groups 11. The output can be detected, for example, by providing the management PC 19 with a current sensor (which can be configured with the same sensor as the current sensor 34 shown in FIG. 6). Since the other configuration is the same as that shown in FIG. 2, for example, detailed description is omitted.
- the generated power of each unit group power collection control unit 12 can also be detected by detecting the output current of the unit group power collection control unit 12 without depending on the output of the power conversion device 15. In this case, It can be obtained by measuring the current value of the concentrating bus bar 38 (see Fig. 6) or by calculating the sum of the current detected by the current sensor 34 for each photovoltaic power generation unit 1 .
- the current value (DC output current) of the concentrator bus bar 38 see Fig. 6) Detection by is effective.
- the tracking accuracy of each unit group current collecting control unit 12 is grasped, and the tracking The unit group current collection control unit 12 corresponding to the generator unit group 11 with irregularity can be corrected at any time, and the tracking accuracy of all the unit group current collection control units 12 can be best and evenly adjusted. It becomes.
- FIG. 12 is a conceptual diagram showing a conceptual configuration example of the photovoltaic power generation system according to Embodiment 4 of the present invention.
- the photovoltaic power generator units 1 are sequentially installed at the installation site.
- the photovoltaic power generator units 1 are sequentially installed at the installation site.
- it is equivalent to the time required for pure construction work and the condition setting and initial setting of the azimuth 'tilt in two axis rotations of azimuth rotation and tilt rotation of tracking drive It takes time.
- each photovoltaic power generation device unit 1 is driven and controlled by the control from the power management station 10s. Rather than performing the setting, it is more efficient to complete the initial setting every time one photovoltaic power generation unit 1 is installed at the installation site.
- the notebook personal computer As a terminal is also used. Connect the controller 20 so that it can communicate with the unit group current collection control unit 12 wirelessly or by wire. As a result, the tracking drive of the photovoltaic power generator unit 1 can be switched from automatic to manual, and the unit group current collection control unit 12 corresponding to the photovoltaic power generator unit 1 can be individually controlled by the notebook personal computer 20. Become.
- the solar cell module 2 can be aligned with the solar position at that time so that the generated power (output) is maximized, the initial setting can be performed easily and installed. The efficiency and ease of work can be improved and the installation cost can be reduced.
- the unit group current collection control unit 12 can be individually controlled independently. Therefore, even after the solar power generation system 10 is operated, the solar power generator unit 1 in which the power generation abnormality has occurred. This facilitates on-site support for repairs and maintenance, and makes it possible to improve the efficiency of maintenance work.
- Fig. 13 is a graph showing the daily fluctuations in the amount of solar radiation applied to the fixed installation solar cell module and the amount of direct solar radiation applied to the tracking solar cell module.
- the graph shows time on the horizontal axis and solar radiation SQ on the vertical axis.
- a fixed installation type solar cell module is installed at an angle of noon to the sun at noon. Therefore, when comparing the solar radiation amount of the fixed installation type solar cell module (total solar radiation amount SQa) and the solar radiation amount of the tracking type solar cell module (direct solar radiation amount SQd), the same solar radiation amount SQ is obtained at noon. At other times, the direct solar radiation SQd of the tracking solar cell module increases. In other words, the power generated by tracking solar power generation is determined by the direct solar radiation SQd, which is generally less than the so-called solar radiation SQ (global solar radiation SQa).
- the power generated by the tracking type solar power generation unit 1 composed of the tracking type solar cell module is larger than the power generated by the photovoltaic power generation unit composed of the fixed installation type solar cell module.
- the power that grows and has the advantage is that you can generate electricity without any shortage! / I can't figure out if the direct solar radiation SQd is a component.
- the present embodiment is configured so that the direct solar radiation amount SQd can be easily and reliably grasped.
- FIG. 14 is a conceptual configuration diagram conceptually showing a configuration example of the photovoltaic power generation system according to Embodiment 5 of the present invention, and is a schematic perspective view of the photovoltaic power generation unit showing the installation status of the direct solar radiation meter
- FIG. 15 is a conceptual diagram conceptually showing a configuration example of the photovoltaic power generation system according to Embodiment 5 of the present invention, and is a schematic configuration diagram showing a schematic configuration of the photovoltaic power generation system.
- At least one of the plurality of photovoltaic power generation device units 1 arranged in the photovoltaic power generation system 10 (power generation device unit group 11)
- the direct solar radiation meter Is is installed in Although only one power generator unit group 11 is illustrated, when a plurality of power generator unit groups 11 are arranged, it is possible to arrange a direct solar radiation meter Is in each of the power generator unit groups 11. .
- the direct solar radiation meter Is is installed in parallel to the front normal direction of the solar cell module 2 (panel surface: vertical direction of the light receiving surface). Therefore, the direction can be changed (tracking drive) in synchronization with the tracking drive of the solar cell module 2. Since the direct solar radiation Is is corrected for an error of about ⁇ 5 ° relative to the sun's direction and the true direct solar radiation SQd can be measured, the solar power generation unit with the direct solar radiation Is installed Even if tracking deviation is caused in 1, true direct solar radiation SQd can be measured by correction.
- the direct solar radiation amount S Qd data is sent in real time to the management PC 18 via, for example, the unit cable lc from the direct solar radiation meter Is installed in one photovoltaic power generation unit 1.
- the theoretical value (reference generated power) of the solar power generation system 10 calculated from the direct solar radiation SQd the theoretical value and the actual generated power are displayed on the management PC18 screen.
- Power generated by the photovoltaic power generation unit 1 is displayed side by side.
- the calculation of the reference generated power can be performed efficiently by performing it at predetermined time intervals.
- the power generation efficiency of the solar power generation system 10 can be easily grasped.
- the solar power generation unit 1 that has a small actual power generation and has a power generation abnormality, and correct the power generation abnormality (for example, tracking shift) of the solar power generation unit 1 that has a power generation abnormality Can do. Furthermore, it is also possible to detect a power generation abnormality other than the tracking shift, for example, a deterioration state of the solar power generation device unit 1 (solar cell module 2).
- FIG. 16 is a perspective view showing an appearance of a solar power generation unit applied to the solar power generation system according to Embodiment 6 of the present invention.
- each solar power generation unit 101 is provided with a dispersion control unit 114, and a unit state detection unit that detects a power generation state is provided in the dispersion control unit 114.
- the configuration is the same as in the first embodiment.
- the unit state detection unit of each photovoltaic power generation unit 1 is provided in the unit group current collection control unit 12, whereas in this embodiment, the unit state detection is performed.
- the distributed control unit 114 are provided in the distributed control unit 114.
- the main configuration of the photovoltaic power generation unit 101 is the same as that of the first embodiment, and a unit cable 101c is connected to the connection box 4 provided in the support portion 5.
- This unit cable 101c includes a generated power cable lOlcg that transmits the generated power generated by the solar cell module 2, a power cable 101 cp connected to a power source that drives the tracking drive unit 3, and a tracking drive unit. And a time information system cable 10 let to transmit the date / time information signal necessary to control the 3.
- FIG. 17 and FIG. 18 are conceptual diagrams conceptually showing the configuration of the photovoltaic power generation system according to Embodiment 6 of the present invention.
- FIG. 17 is a conceptual diagram conceptually showing the configuration of the photovoltaic power generation system in the case where one unit group power collection control unit and one power converter are arranged in correspondence with each other.
- This solar power generation system 100 is different from the solar power generation system shown in FIG. 2 described above in that a unit state detection unit is provided for each of the solar power generation unit units in the distributed control unit 114 of each solar power generation unit 101.
- the other configurations are the same as those in FIG. 2, and thus detailed description thereof is omitted.
- Fig. 18 conceptually shows a configuration of photovoltaic power generation when a plurality of photovoltaic power generation device units 101 are arranged in a serial or parallel connection with the unit cable 101c via the dispersion control unit 114. It is a conceptual diagram.
- the power generated by the plurality of photovoltaic power generation apparatus units 101 is combined into one unit group current collection control unit 112 via each distributed control unit 114.
- the power is supplied (transmitted) to the power conversion device 15 corresponding to the unit group power collection control unit 112 via one unit group power collection control unit 112.
- the control speed of the unit group power collection control unit 112 the drive speed of the tracking drive unit 3 of the solar power generation unit 101, etc.
- the layout of the unit cable 101c constituting the photovoltaic power generation system 100 is varied as shown in FIGS.
- the drive control statuses of the adjacent photovoltaic power generation unit 101 can be recognized from each other, so that the driving timing of the photovoltaic power generation unit 101 can be arbitrarily shifted. There are merits that can be done.
- each photovoltaic power generation unit 101 Power is supplied to each photovoltaic power generation unit 101 from the power management station 10s via the conversion cable 112c, the unit group power collection control unit 112, and the unit cable 101c (power supply lOlcp).
- the power generated by each photovoltaic power generation unit 101 is aggregated to the power conversion device 15 in the power management station 10s via the unit cable 101c (generated power cable lOlcg), the unit group current collection control unit 112, and the conversion cable 112c. Is done.
- the transmission of the time information system signal from the unit group power collection control unit 112 to each photovoltaic power generation unit 101 is performed via the time information system cable lOlct as described above.
- Any communication method such as serial communication or parallel communication using commonly used RS232C, RS485, USB, optical communication, etc. can be used, and the power cable is controlled by lOlcp. It is also possible to use the power cable lOlcp as a time information system cable 1 Olct with the system signal superimposed.
- the unit cable 101c conversion cable 112c
- the power cable 101cp, the generated power cable lOlcg, and the time information system cable lOlct must be in the same wiring path without affecting each other. It is desirable for the construction to be contained within.
- the configuration of the cable is not limited to the example described above, and can be set as appropriate.
- the unit group current collection control unit 112 is configured to be installed as close to the photovoltaic power generation unit 101 as possible.
- the unit group power collection control unit 112 collects the generated power cable lOlcg, the power supply cable 101cp, and the time information system cable lOlct constituting the unit cable 101c connected to each photovoltaic power generation unit 111.
- the connection between the long-distance unit group power collection control unit 112 and the power management station 10s is 1 This can be done by the conversion cable 112c, and the wiring can be simplified. Also, safety in construction, stability in maintenance, and reliability can be ensured.
- the unit information collecting control unit 112 can easily arrange and arrange the time information system cables lOlct and the generated power cables lOlcg connected to each photovoltaic power generation unit 101.
- the number of wiring from the control unit 112 to the power management station 10s (the number of conversion cables 112c) can be reduced to the minimum, simplifying the wiring 'cost reduction, photovoltaic power generation unit 101 (power generation unit Since a plurality of cables (unit cable 101c) from group 111) can be combined into a single conversion cable 112c to supply power to power converter 15, power generator unit group 111 and power converter 15 Can be connected in a very orderly and simple manner.
- the unit group current collection control unit 112 will be described in more detail with reference to FIG.
- FIG. 19 is a configuration example of a unit group power collection control unit applied to the photovoltaic power generation system according to Embodiment 6 of the present invention
- FIG. 20 is a photovoltaic power generation according to Embodiment 6 of the present invention
- FIG. 2 is a configuration conceptual diagram conceptually showing the configuration of a configuration example of a distributed control unit applied to a system.
- the unit group current collection control unit 112 includes a solar cell output terminal block 131, a time information system cable terminal block 132, a collecting bus bar 38, and a hub 139 as basic components.
- the role of the unit group power collection control unit 112 in the present embodiment is to collect the generated power of the power generation device unit group 111 and to control the transmission of time information to the distributed control unit 114.
- the decentralized control unit 114 obtains time information necessary for solar orbit calculation, and transmits and receives drive command Z movement position signals to the drive system driver circuit of each unit to control the drive system.
- the time information may be transmitted based on the clock provided in the unit group current collection control unit 112, or the time information in the power management station may be transmitted to the distributed control unit via the unit group current collection control unit 112. Also good.
- the time information transmission control can be done at any time, and it can be a deviation from regular or intermittent transmission, transmission only during the day, or transmission when the amount of solar radiation is secured. May be! /
- the power generation power cable lOlcg wired from the photovoltaic power generation unit 101 is associated with the terminal to which the number corresponding to the photovoltaic power generation unit 101 is assigned. Connected. A time information system cable lOlct is connected to the time information system cable terminal block 132 corresponding to the numbering in the same manner as the generation power cable lOlcg.
- appropriate power is supplied from the power management station 10s via the conversion cable 112c to ensure necessary operation.
- the power is supplied to the photovoltaic power generation unit 101 via the power cable lOlcp.
- the distributed control unit 114 includes, as a basic configuration, a solar cell output terminal block 31, a control system cable terminal block 32, a backflow prevention diode 33, a current sensor 34, a data acquisition unit 35, a drive control controller 36, and a drive.
- Driver 37 is provided.
- the power (current) supplied to the solar cell output terminal block 31 of the dispersion control unit 114 is passed through the backflow prevention diode 33 to the current sensor 34 as a unit state detection unit that detects the power generation state.
- Output current (generated current) is measured in real time as needed. That is, the distributed control unit 114 is configured to include a unit state detection unit.
- the power generation state can be detected by measuring the generated power and the generated voltage in addition to the output current by using a sensor of another form.
- the output current can be measured at any time by the current sensor 34, it is possible to easily and accurately detect a power generation abnormality (for example, a tracking abnormality) of the photovoltaic power generation apparatus unit 101 in real time.
- a power generation abnormality for example, a tracking abnormality
- the output current is detected for each individual photovoltaic power generation unit 101, it is possible to easily identify the photovoltaic power generation unit 101 that has generated a power generation abnormality. This can be corrected, and a decrease in the generated power of the photovoltaic power generation unit 101 (solar power generation system 100) can be easily and reliably prevented.
- the measured output current is converted into data by the data acquisition unit 35 and stored in the drive control controller 36.
- the ID code as a unit identification signal for identifying the photovoltaic power generator unit 101 and the output current are collated and stored.
- the time information signal from the time information system cable lOlct output from the unit group current collection control unit 112 is transmitted to the drive control controller 36 of the distributed control unit 114, and the solar power generation unit 101 unit solar power unit
- the trajectory calculation is performed and converted into a control signal by the driving driver 37, and the driving control unit 3 of each photovoltaic power generation unit 101 is adjusted for the tracking drive by the corresponding driving driver 37.
- FIG. 21 is a conceptual configuration diagram conceptually showing a configuration example of the photovoltaic power generation system according to Embodiment 7 of the present invention.
- the notebook personal computer 20 as a terminal is connected wirelessly or wiredly.
- the notebook personal computer 20 is connected so as to be able to communicate not only with the unit group power collection control unit 112 but also with the distributed control unit 114, and other configurations are the same as in the first embodiment.
- the unit group current collection control unit 112 and the distributed control unit 114 can be individually controlled, so that a power generation abnormality occurred even after the photovoltaic power generation system 100 was operated. This makes it easier to handle on-site when repairing or maintaining the photovoltaic power generation unit 101, and further improves the efficiency of maintenance work.
- the distributed control unit 114 can be individually controlled, the operation of the control system Z detection system can be easily confirmed on a unit basis.
- the present invention can be applied to a solar power generation system and a solar power generation system control method configured by arranging a plurality of solar power generation units having a solar cell module and a tracking drive unit.
Abstract
Description
Claims
Priority Applications (5)
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US12/298,233 US8288644B2 (en) | 2006-04-24 | 2007-04-23 | Photovoltaic power generation system and photovoltaic power generation system control method |
JP2008513192A JP5137820B2 (ja) | 2006-04-24 | 2007-04-23 | 太陽光発電システムおよび太陽光発電システム制御方法 |
EP07742176A EP2012363A1 (en) | 2006-04-24 | 2007-04-23 | Photovoltaic power generation system and photovoltaic power generation system control method |
AU2007244454A AU2007244454B2 (en) | 2006-04-24 | 2007-04-23 | Photovoltaic power generation system and photovoltaic power generation system control method |
US13/618,863 US9086228B2 (en) | 2006-04-24 | 2012-09-14 | Photovoltaic power generation system and photovoltaic power generation system control method |
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JP2006119454 | 2006-04-24 |
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US12/298,233 A-371-Of-International US8288644B2 (en) | 2006-04-24 | 2007-04-23 | Photovoltaic power generation system and photovoltaic power generation system control method |
US13/618,863 Division US9086228B2 (en) | 2006-04-24 | 2012-09-14 | Photovoltaic power generation system and photovoltaic power generation system control method |
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US (2) | US8288644B2 (ja) |
EP (1) | EP2012363A1 (ja) |
JP (1) | JP5137820B2 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
US20090159113A1 (en) | 2009-06-25 |
JP5137820B2 (ja) | 2013-02-06 |
US20130009486A1 (en) | 2013-01-10 |
EP2012363A1 (en) | 2009-01-07 |
US9086228B2 (en) | 2015-07-21 |
JPWO2007125867A1 (ja) | 2009-09-10 |
US8288644B2 (en) | 2012-10-16 |
AU2007244454B2 (en) | 2011-06-30 |
AU2007244454A1 (en) | 2007-11-08 |
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