TY - SER AU - Muller, Bernd TI - Energy from Everywhere KW - INTERNET KW - VIRTUAL POWER PLANTS N1 - Fifteen years ago, only a few hundred power stations fed electricity into the German grid; in the future, millions of solar, wind, biomass, and small-scale combined heat and power plants will form a diverse energy network. To harness these disparate sources, German utility providers RWE and Stadtwerke Munchen have set up virtual power plants based on technology from Siemens ER -