Method of finding a maximum power of a photovoltaic generator
First Claim
1. A method of finding a power maximum of a photovoltaic generator, using MPP regulation of a power converter by means of which a maximum generator power is set at an operating point of the generator'"'"'s characteristic curve,wherein the MPP regulation is switched off in order to find a plurality of power maxima due to partial shadowing effects and wherein the MPP regulation is switched off in order to then load and/or unload the generator and that the MPP regulation is next switched on again in order to bring the operating point of the generator'"'"'s characteristic curve from a stable condition into an instable condition and vice versa, wherein the instable condition is performed in that way, that a new operating point that is arranged near to a local or global maximum is provided nearly without delay.
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Accused Products
Abstract
A method of finding a power maximum of a photovoltaic generator using an MPP regulator of a photovoltaic current converter by means of which a maximum generator power is set at an operating point of the generator'"'"'s characteristic curve is intended to supply improved efficiency when the generator is partially shadowed. This is achieved by switching the MPP regulator off in order to next load and/or unload the generator to allow a new operating point of the generator'"'"'s characteristic curve to set and by next switching the MPP regulator on again.
43 Citations
11 Claims
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1. A method of finding a power maximum of a photovoltaic generator, using MPP regulation of a power converter by means of which a maximum generator power is set at an operating point of the generator'"'"'s characteristic curve,
wherein the MPP regulation is switched off in order to find a plurality of power maxima due to partial shadowing effects and wherein the MPP regulation is switched off in order to then load and/or unload the generator and that the MPP regulation is next switched on again in order to bring the operating point of the generator'"'"'s characteristic curve from a stable condition into an instable condition and vice versa, wherein the instable condition is performed in that way, that a new operating point that is arranged near to a local or global maximum is provided nearly without delay.
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8. A method of finding a power maximum of a partially shadowed photovoltaic generator having multiple maximum power points, comprising the steps of
setting a first operating point of the photovoltaic generator at a first maximum power point using an MPP regulator of an inverter; -
switching off the MPP regulator; loading or unloading the photovoltaic generator by a predetermined factor by adjusting the output current of the inverter; and
turning on the MPP regulator. - View Dependent Claims (9, 10, 11)
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Specification