The electricity systems of many countries are currently undergoing a
process of transformation. Market liberalization has induced major
mergers and acquisitions in the electricity sector, but has also forced
companies to seek out new business areas. Environmental regulations,
like the Kyoto process and the European Emissions Trading Scheme, are
exposing the sector to external pressure. New technologies - such as
renewable energy, combined heat and power (CHP), or "clean coal"
technologies - are emerging. Recent worldwide experiences with blackouts
have once more put security of supply on the agenda. In Germany, the
nuclear phase-out and decommissioning of outdated coal plants will lead
to a need for replacement of more than one third of the current
generation capacity by 2020. The need for replacement is an extremely
important driving force for the current transformation, forcing
conventional and new technologies to compete for a role in the future
energy supply. The overall transformation of electricity systems is
neither driven nor shaped by technical or societal modifications alone,
but rather by a rich diversity of processes in the realms of technology,
politics, society and economy.