WO2007006564A2 - Dispositif de surveillance de panneaux photovoltaiques - Google Patents

Dispositif de surveillance de panneaux photovoltaiques Download PDF

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Publication number
WO2007006564A2
WO2007006564A2 PCT/EP2006/006820 EP2006006820W WO2007006564A2 WO 2007006564 A2 WO2007006564 A2 WO 2007006564A2 EP 2006006820 W EP2006006820 W EP 2006006820W WO 2007006564 A2 WO2007006564 A2 WO 2007006564A2
Authority
WO
WIPO (PCT)
Prior art keywords
monitoring
photovoltaic panels
window comparator
event
inverter
Prior art date
Application number
PCT/EP2006/006820
Other languages
German (de)
English (en)
Other versions
WO2007006564A3 (fr
WO2007006564B1 (fr
Inventor
Jobst-Peter Riese
Original Assignee
Rev Renewable Energy Ventures Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rev Renewable Energy Ventures Inc. filed Critical Rev Renewable Energy Ventures Inc.
Publication of WO2007006564A2 publication Critical patent/WO2007006564A2/fr
Publication of WO2007006564A3 publication Critical patent/WO2007006564A3/fr
Publication of WO2007006564B1 publication Critical patent/WO2007006564B1/fr

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1409—Mechanical actuation by lifting or attempted removal of hand-portable articles for removal detection of electrical appliances by detecting their physical disconnection from an electrical system, e.g. using a switch incorporated in the plug connector
    • G08B13/1418—Removal detected by failure in electrical connection between the appliance and a control centre, home control panel or a power supply
    • 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
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • 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 invention relates to a device for monitoring photovoltaic modules in the event of theft or damage by the evaluation of residual voltage signals.
  • the object of the invention is to find a device that delivers a signal without DC voltage application through a DC monitoring in case of damage or theft.
  • This residual brightness produces a low electrical voltage, which can range from a few hundred millivolts to a few volts / GAK. Since the cables are galvanically isolated from the solar modules to the inverter, ie high impedance, this voltage can be used to monitor the entire system.
  • a window comparator which evaluates the following criteria and is installed in each GAK:
  • the window comparator If the solar module is in operation during the day, a high voltage is created.
  • the monitoring device here called the window comparator; the signal “window outside” is activated and the system is switched on, in which a relay attracts the panels with the solar modules galvanically switched through to the inverter.
  • the window comparator will reach the threshold "window within”.
  • the output of the window comparator "window outside” is deactivated and the relay for connecting the panels to the inverter drops off and opens this circuit.
  • the signal "window within” reaches the encoder, in which a clear assignment to the respective GAK is determined. is laid.
  • the generated signal is forwarded to the decoder and to the central evaluation device via a line secured by closed-circuit current.
  • the signal transmission path is protected by a normally closed contact (Ük) in the GAK, which is located in the housing of the GAK, in which the contact drops when the GAK's housing is opened and the closed circuit is interrupted.
  • Ük normally closed contact
  • the additional power supply for this protection device where at fixed intervals a signal from the encoder in the GAK to the decoder in the central alarm device requires a few milliwatts, which are taken from a small battery and which is fed by the live conductors to the inverter during operation or can be ensured by remote feeding through the control cables.
  • the monitoring device consists of:
  • the device is shown in the drawing.
  • Solar systems for operation with the invention consist of a series of solar panels 1, of which a certain number are connected in series and connected to a device connection box 2.
  • a variety of such Terminal boxes 2 is connected in parallel and connected to an inverter 17, which generates a usable AC voltage from the DC voltage generated by the solar panels.
  • the number of solar panels 1 connected in series is selected such that the resulting voltage for the inverter 17 can be used.
  • a monitoring device 3 according to the invention is integrated in each of the device connection boxes 2.
  • the solar panels 1 are connected via the terminal 4 with the monitoring device.
  • the terminal 5 is used for power transmission to the inverter 17.
  • a switching relay 6 can connect the solar panels 1 to the inverter 17 in response to a control pulse.
  • a window comparator 8 which is connected to the panel terminal 4 with the interposition of an overvoltage protection 7, is used.
  • a reference voltage can be set at the window comparator 8.
  • the comparator result of the window comparator 8 can be fed via a coder 9 via a line 10 to a central alarm device 13, with a quiescent current 11 having a normally closed contact 12 being additionally provided for increasing safety, by means of which manipulations on the control line 10 can be detected.
  • a battery buffer 18 is provided to provide power to the entire monitoring device 3 when the solar panels 1 do not generate sufficient energy.
  • the evaluation unit 13 includes a decoder 14 for the signals of the encoder 9 and a quiescent current monitor 15 which monitors the signal lines for tampering attempts with the quiescent current line 11 and the normally closed contact 12. Furthermore, an evaluation and reporting device 16 is provided which evaluates the interference signals generated by the decoder 14 and the quiescent current monitoring 15 and, if necessary, triggers an alarm.
  • the monitoring device works as follows:
  • the window comparator 8 If enough light on the solar panels 1, so that they generate a sufficiently high utility voltage, it is detected by the window comparator 8 as lying above the upper limit and the relay 6 is switched so that the voltage is applied to the inverter 17 and energy is generated. If manipulation attempts are made on the solar panels 1 in this operating state, the generated power drops and a warning signal is generated.
  • the switching relay 6 In the event that no sufficient useful voltage is generated at night or in heavy cloud, when switching below a threshold value of the window comparator 8, the switching relay 6 is released and so the solar panels 1 separated from the inverter 17. Also in this case, a residual voltage is generated by the solar panels 1 due to various residual light influences on the opened by the switching relay 6 high-resistance connection. This is detected with the window comparator 8 and forwarded via the encoder 9, a corresponding signal to the monitoring and reporting device 13.
  • the residual voltage drops significantly, as detected by the window comparator 8 and a corresponding signal is forwarded via the encoder 9 to the monitoring device 13, which triggers an alarm signal in the sequence.
  • Certain fluctuations in the panel voltage about the adjustable reference value are tolerated by the window comparator 8, without an alarm signal is triggered or the switching relay is turned on again before reaching a minimum voltage. In this way, manipulations on the panels can be reliably detected. Since a device connection box is usually equipped in each case with a monitoring device according to the invention, precise assignments to individual panel groups are possible even with larger systems.

Abstract

L'invention concerne un dispositif de surveillance de panneaux photovoltaïques contre le vol et les dégâts. L'invention vise à mettre en oeuvre un tel dispositif de surveillance sous courant continu, fournissant un signal en cas de vol ou de dégâts, sans recevoir de courant nominal. A cet effet, un comparateur à fenêtres présentant une tension de référence programmée, divise, au crépuscule ou de nuit, la tension résiduelle des panneaux photovoltaïques en trois catégories : extérieur ; intérieur ; inférieur. Pour chaque panneau, le comparateur émet un signal codé caractéristique du panneau, vers un système d'alarme central situé sur l'onduleur, déclenchant une alarme caractéristique du panneau en présence du signal « inférieur ».
PCT/EP2006/006820 2005-07-12 2006-07-12 Dispositif de surveillance de panneaux photovoltaiques WO2007006564A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202005011131 2005-07-12
DE202005011131.7 2005-07-12
DE202005020161.8 2005-12-22
DE202005020161U DE202005020161U1 (de) 2005-07-12 2005-12-22 Modulüberwachung

Publications (3)

Publication Number Publication Date
WO2007006564A2 true WO2007006564A2 (fr) 2007-01-18
WO2007006564A3 WO2007006564A3 (fr) 2007-04-05
WO2007006564B1 WO2007006564B1 (fr) 2007-05-31

Family

ID=37429248

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/006820 WO2007006564A2 (fr) 2005-07-12 2006-07-12 Dispositif de surveillance de panneaux photovoltaiques

Country Status (2)

Country Link
DE (1) DE202005020161U1 (fr)
WO (1) WO2007006564A2 (fr)

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US10599113B2 (en) 2016-03-03 2020-03-24 Solaredge Technologies Ltd. Apparatus and method for determining an order of power devices in power generation systems
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