Static Voltage Stability Margin Enhancement Using STATCOM in Grid Connected Wind Farms

In the era of ever increasing deregulation in power systems., load growth due to improvement of global economic rise., industrial infrastructure development., social living status of people, the power system faces new challenges every single day. However the power system has to operate under these ever changing conditions in order to meet the load demand satisfying constraints pertaining to technical., environmental and regulatory issues. In order to achieve this, system must be stable. Of all stabilities related to power system, voltage stability achieves significant importance because of its inherent nature of gradually endangering the power system operation leading to system blackouts. The major reason for voltage instability is the system operation under stressed conditions which is a consequence of many technical issues such as limited generation, increased loading and transmission congestion. In this situation, it is essential to supervise the power system for an extensive range of system circumstances in order to assess voltage stability. FACTS devices prove to be extremely useful in enhancing the voltage stability limits of the power system. Hence, keeping in view, the current scenario of power system deregulation, it is intended to study the effects of incorporating renewable energy sources in power system network and the effectiveness of FACTS devices in improving the voltage stability margin. The proposed work has been implemented on modified IEEE 14 bus test system and the results are analysed.