Abstract
To compensate for the ever-growing energy gap, renewable resources have undergone fast expansions worldwide in recent years, but they also result in some challenges for power system operation such as the static security and transient stability issues. In particular, as wind power generation accounts for a large share of these renewable energy and reduces the inertia of a power network, the transient stability of power systems with high-level wind generation is decreased and has attracted wide attention recently. Effectively analyzing and evaluating the impact of wind generation on power transient stability is indispensable to improve power system operation security level. In this paper, a Doubly Fed Induction Generator with a two-lumped mass wind turbine model is presented firstly to analyze impacts of wind power generation on power system transient stability. Although the influence of wind power generation on transient stability has been comprehensively studied, many other key factors such as the locations of wind farms and the wind speed driving the wind turbine are also investigated in detail. Furthermore, how to improve the transient stability by installing capacitors is also demonstrated in the paper. The IEEE 14-bus system is used to conduct these investigations by using the Power System Analysis Tool, and the time domain simulation results show that: (1) By increasing the capacity of wind farms, the system instability increases; (2) The wind farm location and wind speed can affect power system transient stability; (3) Installing capacitors will effectively improve system transient stability.
Highlights
With the growing population, the electrical load is increasing day by day
It is of great significance to effectively evaluate the influence of wind power generation on power transient stability to improve the safe level of power system operation
doubly fed induction generator (DFIG) of model two-lumped mass based wind turbine is firstly introduced for investigating the dynamics wind farms
Summary
The electrical load is increasing day by day. To compensate the ever-growing energy gap, renewable resources have undergone fast expansion worldwide in recent years [1], but they result in some challenges for power system operation such as the static security and transient stability issues [2,3]. As wind power generation accounts for large share of these renewable energy and reduces the inertia of the power network, the transient stability of power systems with high-level wind generation is decreased and has attracted wide attention recently [4,5]. With the continuous increase in penetration of wind power, it has become an important issue to systematically and effectively evaluate the impact of integrated DFIGs on transient stability [14]. The factors including wind power generation level, the wind power location and wind speed are comprehensively investigated for system transient stability analysis in the paper.
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