Long-medium term hydro-wind-PV complementary operation considering short-term characteristics
Traditional long-medium term operation models based on ten-day/month scales are difficult to describe the opera-tional risk induced by the fluctuations of wind and PV output,and cannot effectively guide the long-term operation of hydro-wind-PV complementary systems.To this end,a method for deriving long-medium term hydro-wind-PV complementary sys-tems operating rules while considering short-term operational characteristics was proposed.First,a short-term operation model was established to estimate possible power curtailment,abandoned water,and lost load in the hydro-wind-PV complementary operation.Then,based on the long series of short-term operation samples,the response relationships between hydropower output and power curtailment,abandoned water,lost load were extracted.Finally,these response relationships were nested in implicit sto-chastic optimization dispatching model to extract operating rules.A clean energy base in the upper Yellow River basin was select-ed as a case study.The results indicated that compared with the simplified operation strategy,the energy increased by6.5%,and the lost load rate decreased by 3.71%through implicit stochastic optimization.Nesting the short-term operational risks in long-term hydro-wind-PV complementary dispatching model can reduce power curtailment and lost load risk,thus effectively guiding the long-term scheduling operation of complementary systems.
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