含恒功率负载的交直流混联配电系统稳定性分析

发布时间：2018-06-23 21:23

本文选题：交直流混联配电系统 + 恒功率负载　；参考：《中国电机工程学报》2017年19期

【摘要】：交直流混联配电系统的稳定性分析方法是评价系统能否安全稳定运行的关键技术。传统稳定性分析方法通常以直流级联系统和直流微电网作为研究对象,而对于含恒功率负载的交直流混联配电系统稳定性分析和评价较少涉及。基于这一问题,提出了适用于交直流混联配电系统的阻抗匹配稳定性分析方法,建立了柔性互联装置、光伏发电单元、恒功率负载以及?型线路的状态空间小信号模型。在多端柔性互联装置采用主从和下垂控制情况下构建了交直流混联配电系统的戴维南等效电路,利用奈奎斯特稳定判据确定了负阻抗稳定边界,并且采用Simulink仿真工具搭建了详细物理模型,通过仿真结果和奈奎斯特曲线对比分析验证了所提稳定性分析方法的可行性。
[Abstract]:The stability analysis method of AC / DC hybrid distribution system is the key technology to evaluate whether the system can operate safely and stably. The traditional stability analysis methods usually take the DC cascade system and DC microgrid as the research object, but the stability analysis and evaluation of AC / DC hybrid distribution system with constant power load are seldom involved. Based on this problem, an impedance matching stability analysis method for AC / DC hybrid distribution systems is proposed. Flexible interconnection devices, photovoltaic units, constant power loads and? The state space small signal model of type A line. In this paper, a Davinan equivalent circuit of AC / DC hybrid distribution system is constructed by using master slave and droop control in multiterminal flexible interconnection device. The negative impedance stability boundary is determined by using Nyquist stability criterion. The detailed physical model is built by Simulink simulation tool. The feasibility of the proposed stability analysis method is verified by comparing the simulation results with the Nyquist curves.
【作者单位】：中国科学院电工研究所;中国电力科学研究院;国网北京市电力公司;
【基金】：国家863高技术基金项目(2015AA050102) 国家自然科学基金项目(51407177) 国家电网公司科技项目(DZ71-16-001)~~
【分类号】：TM712

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