摘要
基于交直流混合微网风光储一体化模型,针对非计划离网的情况,提出一种在并网运行模式与孤岛运行模式下,两者平滑切换的控制策略。首先,在并网运行模式的情况下,互联变换器采用PQ控制策略;在离网运行模式的情况下,采用V/f控制策略;随着运行状态的改变,同时改变控制策略,以达到各自运行模式的最优控制效果。同时,在由孤岛模式切换到并网模式时使用预同步控制,由并网模式切换到孤岛模式时使用积分初值法控制。本研究主要针对特殊状况下,非计划离网的突变性和不确定性等因素,研究并给出控制方式和理论分析,最后通过仿真对本研究所提出的方法进行实验,验证了方法的可行性和有效性,并通过QuiKIS软件分析了孤岛模式和并网模式的系统稳定性。
Based on the AC-DC hybrid microgrid wind-storage integration model,the article proposes a control strategy for smooth switching between grid-connected operation mode and islanding operation mode for the unplanned off-grid situation.First,in the case of grid-connected operation mode,the interconnection converter adopts the PQ control strategy;in the case of off-grid operation mode,the V/f control strategy is adopted;with the change of opera-tion state,the control strategy is changed simultaneously to achieve the optimal control effect of the respective operation modes.Meanwhile,the pre-synchronous control is used when switch-ing from islanding mode to grid-connected mode,and the integral initial value method control is used when switching from grid-connected mode to islanding mode.In this paper,the control method and theoretical analysis are studied and given for the special condition,such as the sudden change and uncertainty of unplanned off-grid,and finally,the method proposed in this paper is experimented through simulation to verify its feasibility and effectiveness,and the system stability of islanding mode and grid-connected mode is analyzed by QuiKIS software.
作者
程东海
王栋
刘喜梅
孙晓鹏
郜登科
李鸿彪
CHENG Donghai;WANG Dong;LIU Ximei;SUN Xiaopeng;GAO Dengke;LI Hongbiao(College of Automation and Electronic Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;Shanghai Keliang Information Technology Co.,Ltd.,Shanghai 200233,China)
出处
《青岛科技大学学报(自然科学版)》
2025年第4期136-143,共8页
Journal of Qingdao University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金项目(52407113)
山东省自然科学基金项目(ZR2024ME075)
山东省高等学校青创科技支持计划项目(2024KJH134)。
关键词
交直流微网
平滑切换
孤岛检测
预同步控制
AC-DC microgrid
seamless switching
pre-synchronous control
islanding detection
