逆变器
控制理论(社会学)
微电网
瞬态(计算机编程)
理论(学习稳定性)
灵敏度(控制系统)
特征向量
计算机科学
电阻抗
工程类
控制工程
电子工程
电压
控制(管理)
物理
量子力学
人工智能
机器学习
操作系统
电气工程
作者
N. Pogaku,Milan Prodanović,T.C. Green
出处
期刊:IEEE Transactions on Power Electronics
[Institute of Electrical and Electronics Engineers]
日期:2007-03-01
卷期号:22 (2): 613-625
被引量:2719
标识
DOI:10.1109/tpel.2006.890003
摘要
The analysis of the small-signal stability of conventional power systems is well established, but for inverter based microgrids there is a need to establish how circuit and control features give rise to particular oscillatory modes and which of these have poor damping. This paper develops the modeling and analysis of autonomous operation of inverter-based microgrids. Each sub-module is modeled in state-space form and all are combined together on a common reference frame. The model captures the detail of the control loops of the inverter but not the switching action. Some inverter modes are found at relatively high frequency and so a full dynamic model of the network (rather than an algebraic impedance model) is used. The complete model is linearized around an operating point and the resulting system matrix is used to derive the eigenvalues. The eigenvalues (termed “modes”) indicate the frequency and damping of oscillatory components in the transient response. A sensitivity analysis is also presented which helps identifying the origin of each of the modes and identify possible feedback signals for design of controllers to improve the system stability. With experience it is possible to simplify the model (reduce the order) if particular modes are not of interest as is the case with synchronous machine models. Experimental results from a microgrid of three 10-kW inverters are used to verify the results obtained from the model.
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