Alternative source module array characterization
A system and method for mapping relative positions of a plurality of alternative energy source modules. In one embodiment, the method includes injecting a first contribution current into a power grid by a first alternative energy source module of the plurality of alternative energy source modules and determining an output voltage for each of the plurality of alternative energy source modules. The method also includes constructing a data structure of the relative positions of the plurality of alternative energy source modules employing the output voltage for ones of the plurality of alternative energy source modules.
1. A method for characterizing a system formed with a plurality of alternative energy source modules, comprising:
enabling a first alternative energy source module of said plurality of alternative energy source modules to provide a first output current and a first output voltage;
enabling a second alternative energy source module of said plurality of alternative energy source modules to provide a second output current and a second output voltage;
determining a first impedance associated with said first alternative energy source module from said first output current and said first output voltage;
determining a second impedance associated with said second alternative energy source module from said second output current and said second output voltage;
constructing an impedance matrix from said first and second impedances; and
assessing an operational condition of said system employing said impedance matrix.
2. The method as recited in claim 1 wherein said assessing comprises employing said impedance matrix to determine if changes are occurring in said system.
3. The method as recited in claim 1 wherein said assessing is performed periodically to determine if changes are occurring in said system.
4. The method as recited in claim 1 wherein said first and second impedances represent conductors coupling said plurality of alternative energy source modules to a power grid.
5. The method as recited in claim 1 wherein respective impedances of said plurality of alternative energy source modules including said first and second impedances provide an indication of a number of said plurality of alternative energy source modules in said system.
6. The method as recited in claim 1 wherein said first and second impedances comprise module impedances of said first and second alternative energy source modules, respectively.
7. The method as recited in claim 1 further comprising reporting a fault code for said system in accordance with assessing said operational condition.
8. The method as recited in claim 7 wherein said reporting said fault code is in response to changes over time of said impedance matrix.
9. The method as recited in claim 1 wherein said enabling said first and second alternative energy source modules is in response to a snap command.
10. The method as recited in claim 1 wherein said system is a photovoltaic system.
11. An apparatus operable with a system formed with a plurality of alternative energy source modules, comprising:
a processor configured to:
enable a first alternative energy source module of said plurality of alternative energy source modules to provide a first output current and a first output voltage;
enable a second alternative energy source module of said plurality of alternative energy source modules to provide a second output current and a second output voltage;
determine a first impedance associated with said first alternative energy source module from said first output current and said first output voltage;
determine a second impedance associated with said second alternative energy source module from said second output current and said second output voltage;
construct an impedance matrix from said first and second impedances; and
assess an operational condition of said system employing said impedance matrix.
12. The apparatus as recited in claim 11 wherein said processor is configured to assess said operational condition by employing said impedance matrix to determine if changes are occurring in said system.
13. The apparatus as recited in claim 11 wherein said processor is configured to assess said operational condition periodically to determine if changes are occurring in said system.
14. The apparatus as recited in claim 11 wherein said first and second impedances represent conductors coupling said plurality of alternative energy source modules to a power grid.
15. The apparatus as recited in claim 11 wherein said processor is configured to provide an indication of a number of said plurality of alternative energy source modules in said system based on respective impedances of said plurality of alternative energy source modules including said first and second impedances.
16. The apparatus as recited in claim 11 wherein said first and second impedances comprise module impedances of said first and second alternative energy source modules, respectively.
17. The apparatus as recited in claim 11 wherein said processor is configured to report a fault code for said system in accordance with assessing said operational condition.
18. The apparatus as recited in claim 17 wherein said processor is configured to report said fault code in response to changes over time of said impedance matrix.
19. The apparatus as recited in claim 11 wherein said processor is configured to enable said first and second alternative energy source modules is in response to a snap command.
20. The apparatus as recited in claim 11 wherein said system is a photovoltaic system.