Identification of the Maximum Wind Penetration Level during Over-Frequency Disturbances

Abstract:

Todays power system is integrating increasingly variable and uncertain generation resources, especially wind power. As much of wind generators in the market contribute little or none to system inertia, power system is operated much closer to its dynamic security margin. To identify the maximum wind penetration of a power system following a pre-defined disturbance, the impact of increased wind penetration on post-disturbance stability is studied. In this paper, the disturbance is simulated by a short circuit that leads to the sudden disconnection of a large amount of load demand. When wind power covers a small portion of system demand, the post-disturbance frequency is not much affected by grid-connected wind generators. But when wind penetration is increased to a comparative high level, power system loses stability in the form of undamped frequency oscillation. Simulation results show that, in the occurrence of system disturbances, 60% feed-in wind penetration will make the power system loses stability. Anyway, taking into consideration of simulation accuracy, severity of disturbances and diversity of power systems, 60% must not be a precise result, it could just be used as a reference when analyzing other grids.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 364-369
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.364
• Online since: September 2013
• Authors: Yong Gang Zhang*, Ming Yang Sun, Xian Feng Xu, Wei Jin Zhuang
• Keywords: Frequency Control, Penetration Level, Post-Disturbance, Undamped Oscillation

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