Small-Signal Methods for AC Distributed Power Systems–A Review
Small-Signal Methods for AC Distributed Power Systems–A Review
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DOI：
10.1109/tpel.2009.2029859
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发表时间：
2009-08
影响因子：
6.7
通讯作者：
Jian Sun
中科院分区：
文献类型：
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作者：
Jian Sun
交流分布式电源系统（DPS）可以在一些新的和新兴的应用中找到。与直流分布式电源系统类似，交流DPS依靠电力电子和控制来实现其功能和达到所需的性能。由于源侧和负载侧的主动控制导致系统行为复杂，系统稳定性和电能质量在这两类系统中都是重要的问题。由于系统运行轨迹的周期性时变，传统的小信号分析方法不能直接应用于交流DPS。该问题的可能解决方案包括转换为旋转参考系、使用动态相量建模、降阶建模和谐波线性化。本文综述了这些小信号方法，并讨论了它们的应用和局限性。每种类型的模型与状态空间和基于阻抗的系统分析方法的兼容性也将被讨论。重点讨论了基于相量模型的线性化问题及其在基于阻抗的系统分析中的应用。
AC distributed power systems (DPS) can be found in several new and emerging applications. Similar to dc distributed power systems, an ac DPS relies on power electronics and control to realize its functions and achieve the required performance. System stability and power quality are important issues in both types of systems due to the complex system behavior resulted from active control at both the source and the load side. Traditional small-signal analysis methods cannot be directly applied to an ac DPS because of the periodically time-varying system operation trajectory. Possible solutions to this problem include transformation into a rotating (dq) reference frame, modeling using dynamic phasors, reduced-order modeling, and harmonic linearization. This paper reviews these small-signal methods and discusses their utilities as well as limitations. Compatibility of each type of models with state-space and impedance-based system analysis approaches will also be discussed. Problems related to the linearization of phasor-based models and their use in impedance-based system analysis are highlighted in particular.