This paper deals with the concept development and laboratory testing of an adaptive protection system for distribution networks with distributed energy resources. Adaptation of protection relay settings according to currently available short-circuit current at respective grid nodes, is one solution to cope with the challenges originating from distributed generation. The challenges in conventional protection systems in low and medium voltage grids are discussed and a new concept of an adaptive network overcurrent protection is developed. The soft- and hardware realization of the concept are described and first results of laboratory tests are presented
This paper describes how an adjusted coaction of protection and distribution management systems in future distribution networks can help to improve security of supply. A high penetration with distributed energy resources is considered, challenges for network operation are discussed and protection concepts for both interconnected and islanded operation are developed
Fluctuation of load and generation from distributed energy resources may impact the system protection in distribution networks. The aim of this research work is to determine in how far short-term peak loading conditions restrict the ability of a protection relay to distinguish between load and fault case. Suitable network scenarios are analysed in order to address this new challenge for the system protection
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