Small signal stability research on integrating Wind Power Plant – An Almaty Region Example

The paper presents the results of Wind Power Plant (WPP) influence during its integration to the electrical grid of110 kV and higher, as well as the help of Power System Stabilizer (PSS) to the power system. Providing stability is the most important aspect in the electric power industry, especially when renewable energy sources (RES), in particular WPPs are integrated. When integrating a large amount of RES into the power system, there are challenges for the System Operator associated with generation instability and undamped low-frequency oscillations (LFO). The aim of this work is to study the impact of WPPs integration into traditional power system considering the standards and requirements and the use of PSS in the power system to prevent LFO during WPP integration. The object of the study is an installed WPP in the Almaty region with a capacity of 60 MW. WPP with DFIG type connection to the grid. Rotor-angle stability, small signal stability, voltage stability of the electrical system during the integration of the WPP was carried out. It should be noted that when integrating WPPs into electrical networks without revising the existing PSS at traditional power plants, the oscillatory stability of the power system may decrease.