II. CHANGES IN THE POWER SYSTEMS
For several years the generation, transmission and
distribution of electrical energy is going through some drastic
changes resulting in challenges for the electric power system
operators and potential problems for the corresponding assets.
The consumption of electrical energy is growing world-wide,
but due to economic or environmental restrictions, the
transmission networks do not grow in the same way. New
large generation centers, such as hydro power plants in Brazil
or China, or wind-parks in northern Germany are often built
far away from the consumers. Through the liberalization of
the energy markets, the power flows in the always growing
power networks are becoming more difficult to control,
leading to failures in the network. Measuring the
synchro phasors offers possibilities to analyze such problems
and eventually to react on them.