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Received:June 03, 2013
Received:June 03, 2013
中文摘要: 研究了两级式三相光伏并网发电系统的小干扰稳定性.建立了完整的小信号模型,包含光伏阵列出口侧稳压电容、Boost电路、L滤波器、MPPT控制器和并网逆变控制器.基于PSCAD/EMTDC的仿真模型,利用特征值分析法研究了系统的小干扰稳定性,计算了控制器参数变化时的系统特征值轨迹,据此调整控制器参数.小信号分析与仿真结果表明,合理调整控制器参数,可以提高系统的小干扰稳定性.
Abstract:The small-signal stability of a two-stage three-phase grid-connected PV system is analyzed by means of eigenvalues analysis.A complete small-signal model of the system including voltage stabilizing capacitor, Boost circuit, L filter, MPPT controller and controller for grid-connected inverter is developed.The eigenvalues traces as the controller's parameters variation are calculated, according to which the controller's parameters are adjusted.Additionally, a simulation model of the system based on PSCAD/EMTDC is built.The small-signal analysis and the simulation results show that reasonable adjusting of the conlroller's parameters can improve the small-signal stability of the system.
keywords: grid-connected photovoltaic generation small-signal stability small-signal modeling eigenvalue analysis
文章编号：20140106 中图分类号： 文献标志码：
基金项目:国家863高技术基金(2011AA05A106);上海市科学技术委员会重点科技攻关计划(11dz1210405);曙光计划(10SG51)
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