Effects of wind generation intermittency and volatility on power system transient stability

Abstract

The transient stability analysis incorporating wind power intermittency and volatility is studied in this study. The wind turbines with doubly fed induction generator (DFIG) and direct-driven permanent magnet synchronous generator (PMSG) are considered respectively during analysis. In modelling of DFIG and PMSG the default GE wind turbine model and the Western Electricity Coordinating Council generic wind turbine model are employed respectively. Based on the Jensen modelwhich is applied to describe the wake effect in a wind farm located on flat terrain an equivalent simplified model of a wind farm is established regarding wind farm layout. On the basis of the built wind farm model the Monte Carlo simulation technique combined with two evaluation indices namely angle-based margin index and critical clearing time (CCT) is applied on the IEEE 10-generator-39-bus test system and a real-sized China-Jiangxi power grid as a benchmark to exploit and explore the effects of wind power intermittency and volatility on power system transient stability. The frequency distributions of transient stability evaluation index CCT probability of system transient instability and the range of wind speeds causing system transient instability are simulated. In addition the influence of wake effect on transient stability is discussed as well. © The Institution of Engineering and Technology 2014.