A Study on Small Signal Stability of the Large-Scale Wind Farm with DFIGs

Abstract

The high penetration of doubly-fed induction generators (DFIGs) entails a change in dynamics and operational characteristics of the power system, thus this paper investigates the small signal stability of the large-scale wind farm with DFIGs. The GE 1.5MW DFIG is modeled in power system analysis software package (PSASP), and a large-scale wind farm with DFIGs is established. Then, the two-area test system with four generators is applied to assess the effect of the large wind farm on power system inter-area oscillatory mode in which the penetration and the installation site of the wind farm are considered. Finally, the simulation results indicate that abundant penetration of DFIG-based wind power will improve the inter-area oscillatory, and the integration of wind farms with DFIGs in the receiving area makes the inter-area mode highly damped.

Small-Signal Stability Analysis of Wind Power System Based on DFIG

“…In [2], an aggregated wind farm model with DFIG based wind turbine for small-signal stability study is proposed to deal with the situation that the wind turbines operate receiving different incoming wind speeds. In [3], the 10-generator 39-bus New England test system is applied to assess the effect of the large scale wind farm on power system small-signal stability. In [4], the effect of wind power on the oscillations is investigated by gradually replacing the power generated by the synchronous generators in the system by power from either constant or variable speed wind turbines, while observing the movement of the eigenvalues through the complex plane.…”