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中文摘要：
建立含同步发电机和逆变器微源接口的微电网小信号分析模型。各微源接口首先在本地坐标系上建模,模型忽略同步发电机定子磁链和逆变器电流环等快速动态过程,然后通过网络方程将微源接口和负荷变换到统一旋转坐标轴,最后线性化得到微电网小信号分析模型。利用模型分析微电网离网运行时电压源换流器分别采用PQ下垂控制和PV下垂控制策略时同步机网络参数及控制器参数变化对微电网稳定性和动态特性的影响。采用MATLAB/Simulink构建时域仿真模型进行仿真研究,验证了所建模型的可行性。
英文摘要：
A small-signal stability analysis model is built for a microgrid with the microsource interfaces for synchronous generator and inverter. By ignoring the dynamic transient processes of synchronous generator stator flux and inverter current loop,the microsource interfaces are modeled in local coordinates,which,together with the loads,are then transformed into the unified rotational coordinates by network equations and finally linearized into the small-signal stability analysis model. With the built model,the influence of network or controller parameter variation on the stability and performances of islanded microgrid is analyzed when its voltage source converter applies PQ and PV droop control strategies respectively. The time-domain simulation model is established with MATLAB / Simulink and the correctness of the small-signal stability analysis model is verified.
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