Recently, it is proven the effectivness of driving the grid-connected PV with low power factor to benefit from reactive power exchange with the network (typically to enhance voltage regulation). this is becomes suitable when the inverters are not operating at their rated powers (ie at night, morning or evening times). if so, has this technique any effect on the converters effeciency or performances ?
Dear mustapha
Please see these attachements documents
Regards
https://www.ias.ac.in/article/fulltext/sadh/041/01/0015-0030
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.727.4819
https://ieeexplore.ieee.org/document/7310569/
For the same output current, reducing the power factor causes reduction of the output active power as the output apparent power is nearly the same. Therefore, the inverter efficiency may be increased or decreased due to the reduction of the active power loading. The change in the efficiency depends on the normal loading level, and the reduced loading level. You may refer to
https://www.e-education.psu.edu/eme812/node/738
Dear Mustafa,
Assuming that the VA generated is constant, so decreasing the power factor may lead to lower the converter efficiency. For more details please follow the paper in the link: https://www.osti.gov/servlets/purl/1146928
however, concerning the overall power system it may be beneficial since will reduce the main generator reactive power generation.
Best wishes
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