Abstract：Different from traditional power system, many kinds of micro sources are widely used in microgrid to connect distributed generation (DG) to grid, such as synchronous generator, inverter. As a result, the electrical mechanical transient model used in small signal analysis is very complex. This paper develops the modeling and analysis of autonomous operation of micro-grid with inverter and synchronous generator. A reduced order small signal analysis model is proposed. The synchronous generator adopts three order model and one order exciter model. The inverter considers the outer power loop. Each DG units is modeled in state-space form and all are combined together on a common reference frame. The complete model is linearized around an operating point and the resulting system matrix is used to derive the eigenvalues. The eigenvalue analysis was presented to identify the stability and dynamic effect when the controller and net parameters changes. The results are verified on the basis of the comparison with those obtained from time-domain simulation in the PSCAD/EMTDC environment.
王阳, 鲁宗相, 闵勇, 时珊珊. 基于降阶模型的多电源微电网小干扰分析[J]. 电工技术学报, 2012, 27(1): 1-8.
Wang Yang, Lu Zongxiang, Min Yong, Shi Shanshan. Small-Signal Analysis of Micro-Grid with Multiple Micro Sources Based on Reduced Order Model in Islanding Operation. Transactions of China Electrotechnical Society, 2012, 27(1): 1-8.
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