基于矢量拟合的主从控制微电网稳定性分析
摘要：目前对微电网稳定性分析的研究主要集中于采用下垂控制的微网，对主从控制的微电网尚缺乏深入的研究；此外，现广泛采用的基于状态空间模型和阻抗模型的分析方法需要获取每个分布式电源的详细参数，在实际工程应用中难以实施。为解决上述问题，提出了基于矢量拟合的主从控制微电网稳定性分析方法：将各分布式电源视为黑盒模型测量其频率响应；基于系统拓扑计算系统聚合阻抗；采用矢量拟合技术获取聚合阻抗传递函数进而分析系统稳定性。在MATLAB/Simulink平台建立了微电网仿真模型，通过在并网和孤岛模式下的仿真验证了所提方法的有效性，分析了线路阻抗、负荷等参数变化对微电网稳定性的影响。所提方法无需获取电源内部详细参数，具有较高的工程实用性。
Abstract:At present, the research on microgrid stability analysis is concentrated mainly on the microgrid adopting droop control, the microgrid adopting master-slave control is still lack in the thorough research, besides, it is necessary to obtain detailed parameters of each distributed energy source for the nowadays widely used state-space model and impedance model based analysis method, however it is hard to implement in practical engineering. To cope with above-mentioned problem, stability analysis method for vector fitting based master-slave controlled microgrid was proposed, that is, each distributed energy resource was regarded as a black-box model and its frequency response was measured, based on the system topology the system aggregation impedance was calculated, and finally, the vector-fitting technique was utilized to obtain transfer function of aggregation impedance, furthermore, the system stability was analyzed. On MATLAB/Simulink platform a microgrid simulation model was established, and by means of the simulation under grid-connected mode and isolated mode the effectiveness of the proposed method was verified. The influences of the variation of such parameters as line impedance and load parameters on microgrid stability were analyzed. Needing not to obtain detailed internal parameters of the power supply, the proposed method possesses high engineering practicability.
标题：基于矢量拟合的主从控制微电网稳定性分析
英文标题：A Vector-Fitting Based Stability Analysis of Master-Slave Controlled Microgrid
作者：王蓉, 殷彪, 高阳, 刘彬, 王杨, 宋子宏,
关键词：微电网, 主从控制, 稳定性分析, 测量阻抗, 矢量拟合,
发表日期：2021-12-10
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