摘要：The paper analyses the complementarity of electrical energy yield,using a multiannual,monthly and daily approach,for a small hydroelectric power station,wind turbine and photovoltaic plant.The results obtained point to the existence of a strong negative correlation between the solar industry and the wind industry from the perspective of monthly changes.The energy yield generated by a hydroelectric power station is significantly correlated with the generation yield of wind sources.When considering a multiannual perspective,the existence of a correlation between small-scale water and solar power plants was identified.The conclusions of this study may serve as vital rationales when planning the contribution of these sources to the Polish National Power System (KSE).
关键词：electric power system;renewable energy;instability
