Honorary Professorship Power Automation
The guest lecturer course Basics in Power Automation addresses power engineering students as well as students from other branches. They are given the opportunity to improve their knowledge of protection within electric transmission and distribution networks. The lecture block during the winter semester covers the following topics:
- Basic requirements: Selectivity, redundancy, accuracy, speed of operation
- Protection principles: Over-current protection, distance protection, differential protection and in addition further principles
- Influence of the network structure on the protection concepts
- Algorithms for digital estimation of current and voltage amplitudes as well as impedances
- Protection concepts for lines, transformers, bus-bars and machines including the technical implementation
- Influence of the system neutral grounding on the protection concepts
- Principles for selective protection settings
- Hardware requirements
- Communication in substations
These topics span from traditional power system technology, which for example calculates short circuit parameters with symmetrical components, to numerical measuring method algorithms including the hardware implementation and further on to communication solutions for application in substations. The protection technology in electrical systems is covered both from the point of view of the manufacturer (algorithms, measuring methods) as well as that of the user (protection concepts, application of relay settings).
During the summer semester these topics are consolidated in a workshop. This is mainly done with a protection user point of view. Protection concepts for special system configurations are discussed and the computation of protection settings (“Grading Charts”) is covered in depth. Although the basic principles of protection technology have not significantly changed in the past decades, system wide optimal setting of protection devices is becoming more and more difficult and at the same time more important: in-feed from renewable energy sources as well as intensive trading of electrical energy result in the systems not always being operated in the state that they were designed for and that they are operated closer to their limits. This demands innovative solutions from protection equipment.
Both units are a part of the scope of studies for the English Masters Degree course and are therefore presented in English.
Lecturer in this field is Prof. Dr.-Ing. Siegfried Lemmer, Siemens AG Nürnberg. Prof. Lemmer as the head of the Protection Technology Product Management within Siemens AG and as a member of national and international working groups obtained in depth experience over a long period of time in his area of expertise. He is therefore able to convey this subject matter on a solid theoretical basis and with practical relevance.
