STOCHASTISCHE OPTIMIERUNG (OPERATIONS RESEARCH); PUMPED STORAGE POWER PLANTS + STORAGE POWER PLANTS (ELECTRICAL POWER GENERATION); PUMPSPEICHERKRAFTWERKE + SPEICHERKRAFTWERKE (STROMERZEUGUNG); OPTIMALE REGELUNG (MATHEMATISCHE KONTROLLTHEORIE); CONSTRAINED OPTIMIZATION (OPERATIONS RESEARCH); OPTIMAL CONTROL (MATHEMATICAL CONTROL THEORY); RISK ANALYSIS (OPERATIONS RESEARCH); STOCHASTIC PROGRAMMING (OPERATIONS RESEARCH); ERZWUNGENE OPTIMIERUNG (OPERATIONS RESEARCH); RISIKOANALYSE (OPERATIONS RESEARCH)