Theft detection and prevention in a power generation system

• US 10,969,412 B2
• Filed: 12/07/2017
• Issued: 04/06/2021
• Est. Priority Date: 05/26/2009
• Status: Active Grant

• Current Assignee: Solaredge Technologies Incorporated
• Original Assignee: Solaredge Technologies Incorporated
• Inventors: Sella, Guy, Adest, Meir, Gazit, Meir, Handelsman, Lior, Yoscovich, Ilan, Fishelov, Amir, Binder, Yaron, Galin, Yoav
• Primary Examiner(s): Nguyen, Nam V
• Application Number:
  US15/834,929
• Publication Number:
  US 20180210016A1
• Time in Patent Office: 1,216 Days
• Field of Search: 3405391, 3405712, 3405681, 3405682, 340531, 340533, 340 31, 136244, 136243
• CPC Class Codes: G01R 17/02 Arrangements in which the value to be measured is automatically compared with a reference value
• CPC Class Codes: G01R 27/26 Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
• CPC Class Codes: G08B 13/1409 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
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A system for generation of electrical power including an inverter connected to a photovoltaic source including a theft prevention and detection feature. A first memory is permanently attached to the photovoltaic source. The first memory is configured to store a first code. A second memory is attached to the inverter. The second memory configured to store a second code. During manufacture or installation of the system, the first code is stored in the first memory attached to the photovoltaic source. The second code based on the first code is stored in the second memory. Prior to operation of the inverter, the first code is compared to the second code and based on the comparison; the generation of the electrical power is enabled or disabled.

Claims

1. A method comprising:

receiving a plurality of values, wherein a first value of the plurality of values corresponds to a measurement of an impedance of a photovoltaic direct current (DC) power source;

retrieving a second value from a memory of a device associated with a load;

comparing the first value with the second value to produce a comparison result; and

alerting, by the device, a potential theft corresponding to the photovoltaic DC power source based on one of (i) the comparison result or (ii) determining that at least one value of the plurality of values does not correspond to an impedance measurement.

2. The method according to claim 1, wherein said second value comprises a hash of said first value.

3. The method according to claim 1, further comprising:

determining that the first value corresponds to the second value; and

enabling power conversion of an inverter of the load based on the determination that the first value corresponds to the second value.

4. The method according to claim 1, wherein the first value or the second value is generated by a global positioning system module which bases at least a portion of one of the first value or the second value on global coordinates of the photovoltaic DC power source or an inverter of the load.

5. The method according to claim 1, further comprising:

receiving a third value from a server associated with the load; and

comparing the third value with the second value to produce the comparison result.

6. The method according to claim 1, wherein at least a portion of the first value or the second value is based on global coordinates of at least one of the photovoltaic DC power source or the load.

7. The method according to claim 1,

further comprising determining that the first value corresponds to the second value;

transferring, based on the determining that the first value corresponds to the second value, via a DC power line, electrical power output from the photovoltaic DC power source to the load; and

enabling electrical power output of the load.

8. The method according to claim 1, further comprising disabling, based on the comparison result, electrical power conversion of an inverter of the load.

9. The method according to claim 1,

further comprising determining that the first value does not correspond to the second value;

and disabling, based on the determining that the first value does not correspond to the second value, electrical power output of the load.

10. A system comprising:

a photovoltaic direct current (DC) power source configured to generate DC power and comprising;

a processor configured to calculate a plurality of values, wherein a first value of the plurality of values corresponds to a measurement of an impedance of the photovoltaic DC power source;

a first memory configured to store the first value;

a load coupled to the photovoltaic DC power source via a DC power line;

a second memory associated with the load, the second memory configured to store a second value; and

a processor configured to receive the plurality of values from the photovoltaic DC power source, compare the first value of the plurality of values with the second value to produce a comparison result, and to alert a potential theft corresponding to the photovoltaic DC power source based on one of (i) the comparison result or (ii) a determination, by the processor, that at least one value of the plurality of values does not correspond to a measurement of an impedance.

11. The system according to claim 10, further comprising a global position module located at a location of the load or a location of the photovoltaic DC power source, wherein at least a portion of one of the first value or the second value is based on global coordinates generated by the global position module.

12. The system according to claim 10, wherein said second value comprises a hash of said first value.

13. The system according to claim 10, wherein the processor is configured to determine that the first value corresponds to the second value and to enable, based on a determination that the first value corresponds to the second value, power conversion of an inverter of the load.

14. The system according to claim 10, wherein the first value or the second value is generated by a global positioning system module which bases at least a portion of the first value or the second value on global coordinates of the photovoltaic DC power source or an inverter of the load.

15. The system according to claim 10, wherein the processor is configured to enable, based on a determination that the first value corresponds to the second value, electrical power output of the load.

16. The system according to claim 10, further comprising:

a server comprising a third memory configured to store a third value,

wherein the processor is further configured to compare at least one of the first value and the second value to the third value to generate the comparison result.

17. The system according to claim 10, wherein the photovoltaic DC power source comprises a second processor configured to:

receive the second value;

compare the second value with the first value to produce a second comparison result; and

alert a potential theft corresponding to the photovoltaic DC power source based on the second comparison result.

18. The system according to claim 17, wherein the photovoltaic DC power source comprises a bypass, and wherein the second processor is configured to control the bypass to switch, based on the second comparison result, power generation by the photovoltaic DC power source from being disabled to being enabled or from being enabled to being disabled.

19. An apparatus comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the apparatus to;

receive a plurality of values from a photovoltaic direct current (DC) power source;

calculate a first value of the plurality of values, wherein the first value corresponds to a measurement of an impedance of the photovoltaic DC power source;

retrieve a second value from the memory, wherein the memory is associated with a load;

compare the first value with the second value to produce a comparison result; and

alert a potential theft corresponding to the photovoltaic DC power source based on one of (i) the comparison result or (ii) a determination, by the apparatus, that at least one value of the plurality of values does not correspond to a measurement of an impedance.

20. The apparatus according to claim 19, wherein the instructions, when executed by the one or more processors, cause the apparatus to:

receive a third value from a server associated with the load; and

compare the third value with the second value to produce the comparison result.

21. The apparatus according to claim 19, wherein, the instructions, when executed by the one or more processors, cause the apparatus to:

determine that the first value corresponds to the second value; and

enable power conversion of an inverter of the load based on the determination that the first value corresponds to the second value.