Abstract
In this paper, the impact of increasing in wind energy penetration level on voltage stability is studied by utilizing quasi-static time domain simulation (QSTDS). Connecting a squirrel cage induction generator (SCIG)-based wind farm has an undesirable effect on the voltage stability in power system, especially when this connection is accompanied with increase in the level of wind generation. Due to the asynchronous operation of induction machine, the increment of wind power generation will be possible only by absorption of more reactive power. Increasing in the power reactive consumption of induction generator leads to reduction of voltage in the bus of common connection between wind farm and the grid. Under these conditions, if the reactive power absorption of wind farm is not managed efficiently it would result in voltage instability of the grid. In this paper, it is shown that using static Var compensator (SVC) and static synchronous compensator (STATCOM) has improved the voltage stability of the system and leads to desirable performance of the wind farms.
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