Multiscale power fluctuation evaluation of a hydro-wind-photovoltaic system

The hybrid energy systems are required to operate stably in different time scales. Previous studies on the stability carried out under unrealistic assumption of discontinuous Therefore, a second scale model for is presented this study. To overcome possible uncertainty caused by assumption, new method introduced analyze power fluctuations system considering hydroelectric station (HPS) and PV-wind complementarity. Compared with traditional statistics, proposed three indices, discussed terms variation frequency, have ability show complementarity characteristics varying from hour, results that volatility wind photoelectric increase scale. In (100, 102) seconds, HPS could not compensate as they do meet flexibility demand particular frequency domain, hydro-electric able PV sources well when over 102 s. obtained evolution law has important reference significance subsequent systems.