As scale of solar photovoltaic application continues to expand

real-time state monitoring

fault diagnosis and fault positioning for photovoltaic（PV） array are becoming more and more important.A new kind of PV array sensor embedding method is put forward to reduce usage of sensors on the basis of assure positioning precision.With the structure the consistency and strategic decision problems among the measurement data in diagnosis is solved using fuzzy group decision theory.Experimental result verifies the proposed fault diagnosis and positioning method for PV array has strong ability of anti-interference and increases accuracy and reliability of diagnosis.