VSC-HVDC中直流换流器的比例积分-准谐振-重复控制策略Proportional Integral-Quasi-Resonant-Repetitive Control Strategy for VSC of VSC-HVDC
操丰梅;朱喆;张效宇;韩健;陈建卫;司喆;陈俊;许树楷;
摘要(Abstract):
为解决交流电网不平衡和畸变导致电压源换流器高压直流输电(voltage source converter based high voltage DC transmission,VSC-HVDC)的交直流侧电能质量恶化问题,提出单正序同步旋转坐标系下的d、q轴电流分量的比例积分-谐振控制-重复控制的混合控制策略。通过使有功功率的瞬时波动为零获得了网侧电流正负序分量参考值的表达式,进而利用比例积分控制器控制正序电流分量、谐振控制器控制负序电流分量,而利用重复控制用于抑制交流电网谐波的影响。进一步分析了采样频率与被控信号频率的比值为非整数时对重复控制的影响,进而提出基于线性插值的实际采样点对应的反馈信号的估计方法,以改善重复控制的性能。详细的仿真结果证明了所提出的混合控制策略的正确性和有效性。
关键词(KeyWords): 柔性直流输电系统;不平衡;畸变;单旋转坐标系;混合控制
基金项目(Foundation):
作者(Author): 操丰梅;朱喆;张效宇;韩健;陈建卫;司喆;陈俊;许树楷;
Email:
DOI: 10.13335/j.1000-3673.pst.2015.04.014
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