基于改进下垂法的光伏微电网并网控制策略研究  

Research on control strategy of PV micro-grid connected based on improved droop method

作　　者：孟凡姿[1] 孟杰[2] 潘巧波 马乐[2] 李春来[3] 

机构地区：[1]吉林建筑大学城建学院,吉林长春130118 [2]东北电力大学自动化工程学院,吉林吉林132012 [3]国网青海省电力公司电力科学研究院,青海西宁810008

出　　处：《可再生能源》2016年第5期660-665,共6页Renewable Energy Resources

基　　金：青海省光伏发电并网技术重点实验室项目(2014-Z-Y34A)

摘　　要：基于光伏发电的特点,分别提出了光伏微网孤岛运行、并网运行模式下的电压型下垂法控制策略。实现了其在孤岛模式下的切入负荷的均匀分配和自身稳定运行,以及并网模式下的直流母线电压稳定和最大功率输出。针对由孤岛模式到并网模式切换瞬间对配电网造成冲击的问题,设计了基于改进下垂法控制的预同步器,确保光伏微网的安全并网。基于Matlab/Simulink的仿真实验,验证了所提控制策略的正确性、可行性和有效性。Based on the characteristics of photovoltaic power generation, PV micro-grid are proposed islanding and voltage-drop method of network operation mode control method to achieve a uniform distribution of its cutting load in island mode and stable operation of its own, and the next grid mode DC bus voltage stability and maximum power output. For the island mode and network mode to switch instantly to the impact of the issue of distribution network was designed based on the improved pre-synchronizer droop control law to ensure the safety of PV micro-grid and network. Based on Matlab /Simulink simulation experiments, to verify the correctness, feasibility and effectiveness of the proposed control strategy.

关 键 词：光伏微网 下垂控制 逆变器 预同步器 

分 类 号：TM615[电气工程—电力系统及自动化]