Abstract
In this paper, a practical method to establish Doubly Fed Induction Generator (DFIG) based wind farm equivalent model for switching transient analysis is demonstrated. In order to verify this method, a 3.6MW equivalent wind farm model is built. The steady state results and load switching results are verified with those of detailed models of four 0.9MW generators. Using this method, a model of 40MW wind farm, representing the capacity for a proposed South Carolina offshore wind farm is established. To study large wind farm switching transient impacts on a system, different switching operations such as cable energizing and three phase faults at different locations in wind farm are investigated and their impact on system are analysed. Finally, conclusions based on the switching cases are presented.
Highlights
With the increasing concern about environmental constraints, economic pressure, and energy security requirements, the world energy demand has pushed utilities to invest in renewable energy sources such as wind, geothermal, hydropower, tides, waves, solar, and biomass
Since countries in the world have started moving wind industry into the ocean. 4600 megawatts of offshore wind farms had been installed by mid-2012 [1]; the majority of them are in Europe
This paper focuses on switching transient only
Summary
With the increasing concern about environmental constraints, economic pressure, and energy security requirements, the world energy demand has pushed utilities to invest in renewable energy sources such as wind, geothermal, hydropower, tides, waves, solar, and biomass. (2014) The Impact of the Offshore Wind Farm Switching Transient Operation on Power System. South Carolina, as part of the eastern American coastline, possesses potential offshore wind energy over twice the amount of its state level consumption [4]. The impact of switching transient in power system with offshore wind farm is important to investigate. The fact that offshore wind farms consist of large numbers of relatively small and identical generating units makes equivalent model possible. A DFIG-based wind farm equivalent model is developed for switching transient operation analysis. This paper is organized in two parts: the first part is modelling offshore wind farm equivalent system, and the second part investigates the impact of switching transient operations in offshore wind farm on the transmission system.
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