The reliable transport of electricity according to customers’ needs is crucial for a state’s security of energy supplies. In Germany, to provide sufficient transmission system capacities according to the amount of power to be transferred is the task of the transmission system operators (TSO) which experts say have been doing a good job so far. According to the Federal Ministry of Economics and Technology the German power grid is the most stable in Europe with an average of 21 minutes down time per year. However, as the amount of electricity to be transported is steadily increasing, some sections of the national grid are at already at their limits. Occasionally, wind power plants even have even to be switched off in order to avoid overload.