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A adaptive accelerating frequency drift (AAFD) method combined with the negative impulse current amplitude disturbance is proposed for the islanding detection of grid-connected photovoltaic (PV) system. Based on the number of continuing frequency change towards some direction for the voltage at the point of common coupling (PCC), the positive feedback frequency drift coefficient is adaptive subsection...
A phthalocyanine derivative of poly (phenylethanone)-Znic phthalocyanine (PPE-ZnPc) with excellent film-forming property was synthesized and characterized. The photoconductivity of PPE-ZnPc increased about 6 times compared with dark conductivity, indicating that PPE-ZnPc has good photovoltaic response.
A novel soluble zinc phthalocyanine derivative was synthesized and characterized by infrared (IR) and electronic absorption spectra. Current-voltage characteristics of the films were measured and photoconductivity was increased by an order of magnitude compared with dark conductivity, which indicates the product is a promising functional material for photovoltaic cells.
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