Thesis defence K. Xi: power system stability

20 June 2018 12:30 - Location: Aula, TU Delft - By: webredactie

Power system stability and frequency control for transient performance improvement. Promotor 1: H.X. Lin (EWI); Promotor 2: J.H. van Schuppen (EWI).

Power systems have changed considerably over the past twenty years due to increasing energy supply by wind turbines and solar photovoltaic panels. However, these renewable power sources are suffering from uncertainty of the weather, which further introduces fluctuations to the frequency of the power systems. In order to guarantee the stability of a power systems, it is important to have efficient control algorithms that balance the power supply and demand to avoid serious frequency fluctuations. The traditional algorithms may introduce extra oscillations to the frequency, which threatens the stability of power systems.

In this PhD project, we have proposed new control algorithms for frequency control of large-scale power systems. These algorithms, which are also applicable to power systems with a hierarchical structure, are better at estimating the power-imbalance and avoiding the extra frequency oscillations caused by the controllers. In addition, we study the influences of the topology of the power network on the stability via energy barriers of nonlinear systems. From the study, we show that small cycles in the network can improve the transient stability of the power system. 

More information?

For access to theses by the PhD students you can have a look in TU Delft Repository, the digital storage of publications of TU Delft. Theses will be available within a few weeks after the actual thesis defence.