Flash testing of photovoltaic modules with integrated electronics

Patent metadata

Field	Value
Publication number	US-9735730-B2
Application number	US-201514663976-A
Country	US
Kind code	B2
Filing date	Mar 20, 2015
Priority date	Mar 6, 2011
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A method for testing a photovoltaic (PV) module having an integrated power converter includes: obtaining a reference output signature of a PV module design in response to a flash pattern; applying the flash pattern to a PV module under test; acquiring an observed output signature of the PV module under test in response to the flash pattern; and comparing the observed output signature of the PV module under test to the reference output signature. Second reference output and observed output signatures may be obtained in response to a second flash pattern. The output signatures may be combined using various techniques. One or more parameters of the integrated power converter may be preset to one or more predetermined states prior to applying a flash pattern.

First claim

What is claimed is:

1. A photovoltaic (PV) module, comprising:
at least one PV cell;
an integrated power converter configured to process power from said at least one PV cell and provide power at an output thereof; and
an accessible node configured to enable a parameter of said integrated power converter to be preset to a predetermined state prior to application of a test flash pattern to said PV module.

2. The PV module as recited in claim 1 wherein said accessible node is separate from said output.

3. The PV module as recited in claim 1 wherein said parameter comprises at least one of a node voltage, a bias current, a logic state and a power converter state.

4. The PV module as recited in claim 1 wherein said parameter enables a housekeeping power supply in said integrated power converter.

5. The PV module as recited in claim 1 wherein said integrated power converter comprises a drive train configured to be enabled through said accessible node.

6. The PV module as recited in claim 1 wherein said accessible node is positioned on a connector of said integrated power converter.

7. The PV module as recited in claim 1 wherein said parameter is operable to be released prior to application of said test flash pattern.

8. The PV module as recited in claim 1 wherein said parameter is operable to be maintained in said predetermined state during application of said test flash pattern.

9. The PV module as recited in claim 1 further comprising a plurality of test flash patterns.

10. The PV module as recited in claim 9 wherein said parameter is preset to different predetermined states prior to application of said plurality of test flash patterns.

11. A method of operating a photovoltaic (PV) module, comprising:
providing at least one PV cell;
processing power from said at least one PV cell with an integrated power converter and providing power at an output thereof; and
enabling a parameter of said integrated power converter via an accessible node to be preset to a predetermined state prior to application of a test flash pattern to said PV module.

12. The method as recited in claim 11 wherein said accessible node is separate from said output.

13. The method as recited in claim 11 wherein said parameter comprises at least one of a node voltage, a bias current, a logic state and a power converter state.

14. The method as recited in claim 11 further comprising enabling a housekeeping power supply in said integrated power converter.

15. The method as recited in claim 11 further comprising enabling a drive train of said integrated power converter.

16. The method as recited in claim 11 further comprising positioning said accessible node on a connector of said integrated power converter.

17. The method as recited in claim 11 further comprising releasing said parameter prior to application of said test flash pattern.

18. The method as recited in claim 11 further comprising maintaining said parameter in said predetermined state during application of said test flash pattern.

19. The method as recited in claim 11 further comprising a plurality of test flash patterns.

20. The method as recited in claim 19 further comprising enabling said parameter to be preset to different predetermined states prior to application of said plurality of test flash patterns.

Assignees

• Sunpower Corp

Inventors

• Naiknaware Ravindranath

Classifications

• H02S50/10 Primary

  Testing of PV devices, e.g. of PV modules or single PV cells (testing of semiconductor devices during manufacturing {H10P74/00}) · CPC title

• G01J2001/4266

  for measuring solar light · CPC title

• H02S50/15 Primary

  using optical means, e.g. using electroluminescence · CPC title

• G01J1/42

  using electric radiation detectors (optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10) · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title