Yuting Zheng, Fan Xiao, Weijie Xie, Chunming Tu, Qi Guo
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引用次数: 0
Abstract
Grid-connected converters (GCCs) exhibit diverse stability characteristics at different operating points. However, traditional stability analysis methods usually study the stability of GCC at a specific operating point. To analyze the stability under time-varying operation conditions, this paper proposes an area-based stability analysis method. Firstly, operating point variables are introduced by the coordinate transformation relationship in phase-locked loop (PLL). Secondly, the small-signal model of GCC considering the coupling between PLL and current control is built. Based on the built model, the stable operation domain can be obtained. The stability of the system can be quickly determined by the relative position of the operating point to the stable boundary. Then, the mechanisms of impedance parameters and control parameters on the stable domain are analyzed to improve the stability of GCC. Finally, the effectiveness and correctness of the proposed area-based stability analysis method are verified by simulation and experiment.
期刊介绍:
The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces.
As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.