Singular Perturbation Theory-Based Qualitative Dynamics Investigation of Flywheel Energy Storage System in Discharge Mode
作者： Weiya Zhang , Yongli Li , Xiaoyong Chang , Nan Wang
DOI: 10.1155/2014/487596
关键词: Test bench 、 Transient (oscillation) 、 Electric power transmission 、 Computer science 、 Stability (probability) 、 Control theory 、 Singular perturbation 、 Fixed point 、 Smart grid 、 Bifurcation theory
摘要: An investigation on qualitative dynamics in a voltage-current dual-loop controlled flywheel energy storage system (FESS) operating discharge mode is presented this paper, providing novel insights into the effect of two-timescale characteristics safety and stability transmission FESS. Based singular perturbation theory, approach proposed to separate FESS fast slow subsystems. Stability analysis transient fixed points confirms effects systemic parameters FESS’s indicates that shifts from spiking state quiescent when variable crosses bifurcation point subsystem. Mechanism reveals root cause voltage instability Moreover, feasibility boundaries key are derived, application requirements also discussed, guiding extension engineering applications solving problem some extent at theoretical level. Constant experiment performed based test bench built Key Laboratory Smart Grid Ministry Education, Tianjin University, which validates results.
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