中国电机工程学报Issue(16)：4015-4024,10.DOI:10.13334/j.0258-8013.pcsee.2015.16.003
多端柔性直流输电系统小信号建模
Small Signal Modeling for VSC-MTDC
摘要
Abstract
Small signal model is the basis of stability analysis and control design. This paper aims to revise and improve the defect of existing small signal model of voltage source converter based multi-terminal direct current (VSC-MTDC) through theoretical analysis and derivation. Firstly, it eliminated the impact of AC system short-circuit capacity to accuracy of the small signal model by choosing d-q synchronous reference frame flexibly. Then according to PWM modulation principle, the coupling mechanism between AC and DC of converter were analyzed and used to optimize the linear equation of converter. Meanwhile, the linear equation of controller and DC network were deduced. Finally combining these linear equations, the global small signal model of VSC-MTDC was proposed. Then proved by the simulation, the small-signal model has better accuracy and value for stability analysis, coupling mechanism and control design.关键词
多端柔性直流输电系统/小信号模型/同步旋转坐标系/交直流耦合Key words
voltage source converter based multi-terminal direct current (VSC-MTDC)/small signal model/d-q synchronous reference frame/AC/DC coupling分类
信息技术与安全科学引用本文复制引用
杨洁,刘开培,饶雪,秦亮..多端柔性直流输电系统小信号建模[J].中国电机工程学报,2015,(16):4015-4024,10.基金项目
国家高863高技术基金项目(2015AA050101)。 The National High Technology Research and Development of China 863 Program (2015AA050101) （2015AA050101）
