Patent ID: 11973073
Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KG
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 17:
18. A method for operating a photovoltaic device, the method comprising:
arranging a multi-PV cell group such that, with respect to an incident light direction, a first PV cell of a first cell type is positioned neared to the source of incident light than a second PV cell of a second cell type;
directing the incident light onto the first PC cell to generate a first voltage and a first current and subsequently onto the second PV cell to generate a second voltage and a second current;
providing a measurement of the first voltage, the first current, the second voltage, and the second current to a control device, the control device including a first controller and an independent second controller, the first controller generating a first signal based in part on the measured values of the first voltage and the first current and the second controller generating a second signal based in part on the measured values of the second voltage and the second current;
varying a first input resistance of a first power electronics unit in response to the first signal to vary the first voltage and the first current;
varying, independent of the first input resistance, a second input resistance of a second power electronics unit in response to the second signal to vary the second voltage and the second current; and
operating the first controller to vary the first signal to maximize the product of the first voltage and the first current and operating the second controller to vary the second signal to maximize the product of the second voltage and the second current.