WO2007006564A2 - Device for monitoring photovoltaic panels - Google Patents

Device for monitoring photovoltaic panels 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
Grant status
Application
Patent type
Prior art keywords
device
monitoring
event
photovoltaic panels
theft
Prior art date
Application number
PCT/EP2006/006820
Other languages
German (de)
French (fr)
Other versions
WO2007006564B1 (en )
WO2007006564A3 (en )
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

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Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02Monitoring continuously signalling or alarm systems
    • G08B29/06Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08Signalling of tampering with the line circuit
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00Burglar, theft or intruder alarms
    • G08B13/02Mechanical actuation
    • G08B13/14Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1409Mechanical 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
    • G08B13/1418Removal detected by failure in electrical connection between the appliance and a control centre, home control panel or a power supply
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00Monitoring or testing of PV systems, e.g. load balancing or fault identification

Abstract

The invention relates to a device for monitoring photovoltaic panels in the event of theft or damage. The aim of the invention is to provide a solution that, without a predetermined action of nominal current, furnishes a signal by a monitoring of direct current voltage in the event of damage or theft. To this end, the invention provides that a window comparator with programmed reference voltage divides the residual voltage of the photovoltaic panels, which is given at twilight or night, into three categories: outside, inside and below and, per panel, a coded signal typical for a panel is sent to a central alarm device, which is located next to the inverter and which has a decoder that sets off a panel-specific alarm in the event the signal indicates below.

Description

"A device for monitoring of photovoltaic panels"

The invention relates to a device for monitoring of photovoltaic modules in the event of theft or damage by the evaluation of residual stress signals.

The prior art is given by the utility model G 94 11 783.7 in which a current source is applied with predetermined rated current to the power current line by a suitable device falls below a defined voltage. This approach has the disadvantage of the electric power consumption for small, particularly large photovoltaic systems.

The object of the invention is to find a device that provides predetermined Nennstrombeaufschlagung without a signal by a direct-voltage monitoring in case of damage or theft.

This object is achieved according to the invention by an apparatus having the features of claim 1.

Large photovoltaic systems are usually configured such that a certain number of solar panel in order to achieve the necessary voltage for the inverter are connected in series and these power current lines via device connection boxes (GAK) lead to the inverter. This device connection boxes with a control cable to the inverter are suitable for holding the closed-circuit protection of the invention.

When the system is due to low energy radiation to the mains and the inverter, is still sufficient voltage is present, which can be used for monitoring. In a moonless night the luminance 0.0003 Lux, while be converted into energy by moonlight 0.2 Lux. Add the Resthimmelbe- comes illumination by "Lichtverschirmtzung".

This residual brightness creates a low electrical voltage that can range from a few hundred millivolts to several volts / GAK. Since the lines of the solar modules to the inverter electrically isolated, that are highly resistive, this voltage may be used to monitor the entire system.

According to the invention, a window is used, which evaluates the following criteria and is incorporated into each GAK:

1. Is the solar panel during the day arises in operation a high voltage. In the monitoring device, called window here; the "window outside" signal is activated and the system is switched on, in which a relay is energized, the panels with the solar modules electrically switched by the inverter.

2. the voltage generated during the dusk and night drops below a value that has been set during the installation of the system, in the window comparator, the switching threshold "window within" is achieved. The output of the window "window outside" is deactivated and the relay to connect the panels to the inverter drops and opens this circuit.

3. The "window within" signal reaches the encoder in which a unique assignment to each GAK fixed sets is. The generated signal is transmitted via a secured by bias power source line to the decoder and to the central evaluation device.

4. If the central evaluation unit from the encoded signals of the encoder in the GAK s, and thus the respective panels of solar modules 's is achieved, then the respective GAK' are signaled as "okay".

5. the residual voltage generated by the solar panels falls to zero volts, the output "window below" is activated. Via the signal line from the encoder to the decoder and to the evaluation unit, an alarm is triggered.

6. The signal transmission path is 'secured is s, in which upon opening of the housing of GAK' through a normally closed contact (ICE) in the GAK, located in the housing of the GAK drops s of the contact and the bias power source line is interrupted.

Consequently, continuous monitoring is ensured for all operating states of the system, since all GAK 's are included in the system and paneelgenau an alarm can be triggered by the alarm device.

A separate monitoring of the solar panels during operation with the inverter is not necessary, since already automatically when power loss a fault signal is generated.

The additional power supply for this safety device, in which in fixed deposited time intervals a signal is sent to means in the central alarm from the encoder in GAK to the decoder requires a few milliwatts, which are taken from a small battery and powered by the current carrying conductor to the inverter during operation, is or may be provided by remote power supply by the control cable.

The monitoring device consists of:

1. individual solar panels

2 which are connected in series to the GAK

3. the monitoring device in the individual GAK's

4. the power supply of the panels for GAK

5. the current forwarding to the inverters

6. the switching relays to the inverters

7. overvoltage protection for the window

8. the window with programmed reference voltage

9. the encoder

10 the line to the evaluation unit

11. quiescent current line to the evaluation unit

12. the break contact in the closed-circuit line in GAK

13 of the central alarm at the inverter

14 decoder

15 of the closed-circuit protection

16, the evaluation and reporting device

17. the inverter

18. the battery backup of the monitoring device

The device is shown in the drawing.

Solar systems for use with the invention consist of a series of solar panels 1, of which a certain number of connected in series and having a device connection box 2 are connected. A plurality of such Gera- teanschlusskästen 2 is connected in parallel and connected to an inverter 17 which generates from the power generated by the solar panels DC voltage into a usable AC voltage. The number of series-connected solar panels 1 is chosen such that the thus concluded next voltage for the inverter 17 is usable.

A monitoring device 3 according to the invention is respectively integrated into each of the device connection boxes. 2 The solar panels 1 are connected via the connection 4 to the monitoring device. The terminal 5 is used for the current transmission to the inverter 17. A switch relay 6 can connect to a control pulse, the solar panels 1 to the inverter 17th

a Fensterkompa- rator 8, the protection interposition of a surge 7 is connected to the panel terminal 4 serves to monitor the PaneelSpannung. On FEN sterkomparator 8 a reference voltage is adjustable.

The comparator result of the window 8 is supplied via a coder 9 over a line 10 to a central alarm device 13, wherein a bias power source line 11 is provided with a normally closed contact 12 is provided to increase security even further, by means of which can be recognized manipulations on the control line 10th A battery backup 18 is provided for the entire monitoring device 3 to be supplied with current when the solar panels 1 do not generate enough energy.

The processing unit 13 constitutes a decoder 14 for the signals of the encoder 9 and a closed-circuit protection 15 connected to the bias power source line 11 and the normally closed contact 12 monitors the signal lines to tampering. Furthermore, an evaluation and alarm device 16 is provided, which evaluates the generated from the decoder 14 and the noise Ruhestromüberwa- chung 15 and optionally triggers an alarm.

The monitoring device functions as follows:

Smaller enough light to the solar panels 1, so that they create a sufficiently high working voltage, it is recognized as above the upper limit lying from the window 8 and the relay 6 connected so that the voltage at the inverter 17 is applied and energy is generated. In this operating state, manipulation attempts made to the solar panels 1, the generated power falls off and a warning signal is generated.

In the case that at night or in cloudy weather sufficient useful voltage is generated, is achieved when falling short of a threshold value from the window 8, the switching relays 6 and the solar panels 1 disconnected from the inverter 17th Also in this case, a residual voltage is generated by the solar panels 1 due to various influences residual light at the opened by the switching relay 6 high-impedance connection. This is detected by the window comparator 8, and to forward a corresponding signal to the monitoring and signaling device 13 via the encoder. 9

If, because of tampering or theft attempts in the panels 1 to a line interruption, the residual voltage significantly drops, which recognized from the window 8 and a corresponding signal via the encoder 9 is passed on to the monitoring device 13, which triggers an alarm signal in the sequence. Certain variations in the PaneelSpannung to the adjustable reference value shall be tolerated by the window 8 without an alarm signal is triggered or the switching relay is switched on again before reaching a minimum voltage. In this way, manipulation of the panels allows the reliable detection. Since usually each a device connection box is equipped with an inventive monitoring device, precise assignments to individual Paneel- are groups also possible for larger plants.

For additional security, the Rühestromüberwachung that u even with manipulations of supply lines. like. trigger alarms.

Of course, the invention is not limited to the above embodiment but can be modified in many respects without departing from the spirit. Thus, the design of the individual components and their technical realization is particularly variable and the addition or integration in additional monitoring equipment.

Claims

claims:
1. A device for monitoring of photovoltaic panels in the event of theft or damage, characterized in that a window comparator with the programmed reference voltage, provided at dusk or night rest voltage of the photovoltaic panels a paneeltypisches encoded into the three categories outside, divides within and below and each panel signal is sent to a located at the inverter central alarm means with decoder, which triggers in the event of the signal below a paneelbezogenen alarm.
2. A device for monitoring of photovoltaic panels in the event of theft or damage, characterized in that the bridged on the leading to the inverter lines window comparator having an overvoltage protection from the window comparator.
3. A device for monitoring of photovoltaic panels in the event of theft or damage, characterized in that the window and the encoding unit is powered by a battery backup power, and the battery buffer is daytime fed from the leading to the inverter lines.
4. Device for monitoring of photovoltaic panels in the event of theft or damage, characterized in that the device located in the equipment connection box from overvoltage contactor window and encoding idle current are secured, and upon opening of the housing, the quiescent current is interrupted.
PCT/EP2006/006820 2005-07-12 2006-07-12 Device for monitoring photovoltaic panels WO2007006564B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE202005011131 2005-07-12
DE202005011131.7 2005-07-12
DE200520020161 DE202005020161U1 (en) 2005-07-12 2005-12-22 module monitoring
DE202005020161.8 2005-12-22

Publications (3)

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WO2007006564A2 true true WO2007006564A2 (en) 2007-01-18
WO2007006564A3 true WO2007006564A3 (en) 2007-04-05
WO2007006564B1 true WO2007006564B1 (en) 2007-05-31

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DE (1) DE202005020161U1 (en)
WO (1) WO2007006564B1 (en)

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JP2010245532A (en) * 2009-04-06 2010-10-28 Savio Spa Antitheft and monitoring system for photovoltaic panel
US7900361B2 (en) 2006-12-06 2011-03-08 Solaredge, Ltd. Current bypass for distributed power harvesting systems using DC power sources
WO2011074025A1 (en) 2009-12-14 2011-06-23 Antonio Sacchetti Antitheft system for photovoltaic panels
US8013472B2 (en) 2006-12-06 2011-09-06 Solaredge, Ltd. Method for distributed power harvesting using DC power sources
US8289742B2 (en) 2007-12-05 2012-10-16 Solaredge Ltd. Parallel connected inverters
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US8319471B2 (en) 2006-12-06 2012-11-27 Solaredge, Ltd. Battery power delivery module
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US8766696B2 (en) 2010-01-27 2014-07-01 Solaredge Technologies Ltd. Fast voltage level shifter circuit
US8771024B2 (en) 2009-05-22 2014-07-08 Solaredge Technologies Ltd. Dual compressive connector
US8816535B2 (en) 2007-10-10 2014-08-26 Solaredge Technologies, Ltd. System and method for protection during inverter shutdown in distributed power installations
US8957645B2 (en) 2008-03-24 2015-02-17 Solaredge Technologies Ltd. Zero voltage switching
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WO2007006564B1 (en) 2007-05-31 application
DE202005020161U1 (en) 2006-11-23 grant
WO2007006564A3 (en) 2007-04-05 application

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