Modern societies largely depend on the reliable supply of electrical power. Besides a reliable and economically feasible provision of electrical energy, also the importance of an environmentally sound electrical power supply is increasing. Thus, the power system has been changing for years now. In the past, electrical power was supplied via a centralized system. Large plants supplied power in high-voltage levels to the end customer via transmission and distribution grids. Many newly installed generation plants use renewable primary sources such as wind or solar radiation and supply power to the distribution grid via a decentralized system. Therefore, the power system is transformed from a centralized into a decentralized structure. Furthermore, generation plants such as wind power plants or photovoltaic power systems do not supply energy with rotating machines, mostly synchronous generators as in large power plants, but use dierent technologies for connecting to the grid. If power converters are used for power supply, their behavior diers from synchronous generators not only during regular operation, but also in case of electrical faults in the system. To maintain a high reliability of the power supply, the correct function of the protection system is very important in case of electrical faults. Therefore, it is important that a fault can be cleared quickly and selectively. However, the applied protection devices were optimized for the conventional type of power supply via rotating machines. Therefore, their reactions in case of faults fed by distributed and converter-based generators must be examined in detail. In this thesis, the impact of some converter-based supply will be examined on the functions pickup, direction determination and selective triggering of the distance protection. Short circuits in model mains of an 110kV-voltage range with a conventional generation plant and a wind farm consisting of wind power plants with full-scale converters will be analyzed and the reactions of distance protection devices on dierent supply levels will be compared.