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This paper presents results of earth fault field tests in a medium voltage network using new earth fault detection methods. An interpretation of voltage and current signals measured at the area of influence is provided. The pros and cons of different algorithms in different grid constellations are elaborated. The results show that new detection algorithms can provide stable directional decisions even...
Recently occurred critical system states have triggered a broad discussion between Distribution System Operators (DSO) and Transmission System Operators (TSO) about the actuality and validity of grid restoration plans all across ENTSO-E. Generally being in the responsibility of the TSOs, the role of DSOs in the restoration concept in case of islanded grid restoration is not yet clearly defined and...
For supporting security and reliability of supply KELAG Netz GmbH, TÜV Süd AG, the Institute of Power Systems and Power Economics of Aachen University and FGH e. V. developed a certification of control centres and network operation. This paper describes the development process of certification. Furthermore, the main three columns of the requirements of certification process (process management, risk...
This paper presents decisive factors for a stable islanded grid restoration and operation. To get a detailed replication of the electrical conditions during grid restoration network, operators are dependent on dynamic simulations. Therefore, the 110-kV-grid of the Austrian network operator KELAG Netz GmbH (KNG) and the generation units of the Austrian power plant operator KELAG are modeled in a simulation...