| 摘要 |
<p>The present invention relates to the field of increasing the power efficiency of photovoltaic systems with solar cell(s) (801) or modules by compensating for output-power loss caused by insolation difference and mismatch.
In practical cases, differences will exist between output powers of the solar cells in various modules, e.g. due to (part of) the modules being temporarily shaded, pollution on one or more solar cells, or even spread in solar-cell behaviour that may become worse during aging. Due to the current-source-type behaviour of solar cells and their series connection these differences will lead to a relatively large drop in output power coming from the PV system. This invention addresses this problem by adding DC/DC converters (803) on a single or multiple solar-cell level that add or subtract difference currents thereby increasing the output power of the complete PV system. As a distinguishing feature compared to state-of-the-art, the series and parallel connections of the solar modules in the PV system arc left in tact.</p> |
