摘要
微网并网运行与离网孤岛运行之间的切换会引起电压电流的暂态冲击,从而威胁系统的可靠运行。研究微网离并网运行时的恒压恒频与恒功率控制策略,并提出基于滞环缓冲环节的并网/孤岛无缝切换策略,抑制并网/孤岛切换过程中产生的暂态冲击。最后建立系统的Matlab/Simulink仿真模型,分别仿真分析了传统控制策略和新型控制策略。仿真结果表明,提出的新型切换控制策略可有效抑制切换过程中的暂态冲击,实现微网的平滑切换。
The switching between the grid-connected operation and islanding operation of microgrid will cause the transient impact of voltage and current, and thus threaten the reliable operation of the system. The constant voltage and constant frequency,and constant power control strategies of grid-connected and off-grid operation for microgrid are studied,and the grid- connected / islanding seamless switching strategy based on hysteresis buffer unit is proposed to suppress the transient impact during grid-connected and islanding switching process. The Matlab/Simulink simulation model of the system was established, and the traditional control strategy and new control strategy were simulated and analyzed respectively. The simulation results show that the proposed switching control strategy can effectively suppress the transient impact in the switching process,and realize the smooth switching of the microgrid.
作者
刘玥妤
赵艳雷
刘伟
刘韩琦
LIU Yueyu;ZHAO Yanlei;LIU Wei;LIU Hanqi(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China)
出处
《现代电子技术》
北大核心
2019年第9期76-80,共5页
Modern Electronics Technique
基金
国家重点研发计划子课题:基于微型同步相量测量的智能配电网运行关键技术研究(2017YFB092800)~~
