何晓琼,庞亚辉,陈元辉,黄子桐

• 1:西南交通大学电气工程学院
• 2:国家轨道交通电气化与自动化工程技术研究中心

摘要(Abstract)：

针对城轨柔性直流牵引供电系统中双向能量流动与多源并网的挑战，提出一种新型部分隔离型三端口变换器，通过单一功率级实现光伏、储能与牵引母线的统一功率管理。针对所提三端口变换器调制方式的多自由度特性，构建频域统一功率模型，并结合输出侧等效电路建立离散电压预测模型，分别提出两层候选筛选并结合粗细网格搜索的非线性模型预测控制策略与逐次凸化结合二次规划求解的非线性模型预测控制策略。所提控制方法相较于传统控制响应速度更快，稳态偏差更小，尤其是逐次凸化结合二次规划求解的非线性模型预测控制策略，采用信赖域顺序凸化与二次规划框架，展现了更优的在线求解速度。在多种工况下对所提方法与传统方法进行仿真及试验对比验证，系统评估了控制器的动态性能、鲁棒性以及实时求解能力。

关键词(KeyWords)： 柔性直流牵引供电;三端口直流变换器;频域统一建模;非线性模型预测控制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U2469203)

作者(Author): 何晓琼,庞亚辉,陈元辉,黄子桐

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