弱电网下储能电池能量回馈系统自适应并网控制策略  

An Adaptive Grid-connected Control Strategy for Energy Feedback System in Weak Grid

作　　者：胡国珍[1,2] 段善旭[1] 陈昌松[1] 江小龙[1] 陈曦[1] 

机构地区：[1]强电磁工程与新技术国家重点实验室,华中科技大学,湖北省武汉市430074 [2]湖北理工学院电气与电子信息工程学院,湖北省黄石市435003

出　　处：《电力系统自动化》2013年第1期84-89,共6页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB227206);湖北省教育厅科学研究计划资助项目(B20104404,D20114402)~~

摘　　要：随着充放储一体化电站的建设及推广应用,为提高电站运营经济性,可通过合理安排储能电池充放电时间实现对电网的削峰填谷作用。文中主要研究一体化电站中的储能电池能量回馈装置,重点关注其并网电流电能质量。弱电网下电网阻抗对系统有较大的影响,在分析弱电网特性的基础上,通过注入非特征频率谐波对电网阻抗进行检测,进一步引入一种自适应比例—积分—谐振控制策略,并给出控制器的设计方法及实现过程。最后,通过实验验证表明,该控制策略能有效降低能量回馈装置并网放电电流的总谐波畸变率,保证各次谐波含量满足相关标准要求。With the development and popularization of the charging-discharging-storing integrated power station,it is possible to increase the economic benefits of the station operation through peak clipping and valley filling for the grid by rational arrangements of the energy storage time for the energy storage system.This paper is mainly concerned with the battery energy feedback device of the electric vehicle charging station focusing on its power quality of grid-connected current.Owing to the considerable influence of grid impedance on the control performance in the weak grid,an adaptive proportion integrated resonance（PIR） control strategy based on impedance detection is proposed.Also the method of designing the PIR controller is given.The control strategy can effectively reduce the high frequency harmonic due to resonance and the low-order harmonic.Experimental results have verified the effectiveness of the proposed control strategy with the current total harmonic distortion meeting the requirements of related standards.

关 键 词：弱电网 谐波畸变 能量回馈 储能系统 电网阻抗 

分 类 号：TM912[电气工程—电力电子与电力传动] TM76