In recent years, the Global Climate Change, etc. have affected the electricity consumers' consideration on the power network systems.
The on-going energy shift toward the renewable energy resources(solar and wind power, etc.) and the progress of smart grid systems conducting the demonstration projects at the several sites reflect the changes of collective awareness on energy. Such new energy resources and technologies will invite drastic changes in the existing power network systems which have been built over the several decades. This special edition introduces our initiatives and programs for the energy solutions.