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PHD THESIS
Background and objectives
Within the EU/EEA-area in Europe, work is in
progress to standardize the requirements of
generating units. The objective is to increase the
operational security of the power system.
In the Nordic power system, the hydroelectric
generation is widely spread throughout the
transmission grid. Single short circuit events in
such a system will have impact on a number of
nearby units. These short circuit events imply
heavy strain to the generating equipment.
The capability of hydroelectric generating units
to stay in synchronism through short circuit
events in the connected power network is
investigated.
The impact of the electric relaying systemon the
dynamic properties of generating units which
are interconnected in a comprehensive grid
system is also investigated.
Process, Energy and
Automation Engineering
2016 – 2020
Transient Stability in
High Voltage Power
Systems
Supervisor:
Gunne Hegglid
Co-supervisor:
Svein Thore Hagen
Manjula Edirisinghe
Figure: Fault on oneline of two lines i parallel. Equal-area
criterion. Resistance neglected. 1 is critical clearing angle for
input power Po (Reference: B. M. Weedy, B. J. Cory, N. Jenkins, J.
B. Ekanayeka, G. Strbac, Electrical Power Systems, Fifth edition,
2012, page 289)
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