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Power system restoration takes place where power systems experience a blackout and might be splitted into several islands with limited number of black start units. The main challenge of the restoration process is to keep both frequency and voltage within allowable limits while restoring the network through energizing lines and transformers as well as load pickup. The load pickup scheme is determined...
This paper presents the possibility of using a point-to-point voltage source converter — high voltage direct current (VSC-HVDC) transmission system connecting offshore wind power plant (WPP) to the onshore grid as black start unit to initiate the restoration process for an interconnected electrical system after a large area system blackout. The onshore converter station (CS) provides voltage in order...
The energy turnaround in Europe's and especially Germany's energy system raises various questions concerning the European energy market as well as the electrical power grids in Germany and all over Europe. An enabler to cope with these questions is the possibility to simulate the respective structure of market mechanisms and electrical power transmission. Because of the complexity of both systems...
This contribution investigates the influence of SiC semiconductor devices for HVDC transmission technology on system level. Different SiC devices are recently in the focus of many scientific publications. However, for extra high power applications, the SiC-JFET exhibits promising properties. In order to assess the impact on system losses of such a new technology, a scenario of a large-scale meshed...
Frequency control in interconnected electrical power systems is nowadays realized using the networks' conventional thermal power plants. With the ongoing changes in power systems worldwide the share of these conventional power plants is decreasing while renewable resources such as wind power and photovoltaics are increasing their share continuously. Up to now a contribution of renewable sources to...
The article at hand gives an overview of a newly developed method and tool to flexibly and efficiently remediate different kinds of congestion in the power grid. The presented approach consists of three main steps: Building the network model, identifying the technical factors influencing the congestion, formulating and solving an optimization problem to remediate the congestion by changing the active...
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