Method for determining a maximum power point of photovoltaic generators

US9235226B2 · kind B2 · utility

Assignee

• SMA Solar Technology AG · DE

Inventors

• Jens Klein · Grünwald, DE
• Gerd Bettenwort · Kassel, DE
• Markus Hopf · Vellmar, DE

Key dates

• Filing date: Aug 22, 2012
• Grant date: Jan 12, 2016
• Expiry date: Jul 12, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/56
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method for determining a maximum power point (MPP) of a photovoltaic generator (PV) by variation of at least one parameter of search voltage and search current, within a maximally searchable search area on a power/voltage curve is disclosed. The method includes initializing by defining a start point with a start voltage and a start current, searching for the maximum power point (MPP) in at least one search direction by repeated variation of the search voltage or search current in the search area taking account of at least two limiting conditions for limiting the search area, wherein at least one of the limiting conditions for limiting the search area are is determined with evaluation of parameters provided in an operating state already attained during the search, and ending the search if one of the at least two limiting conditions for limiting the search area is met.