自适应高通滤波下垂控制的孤岛直流微电网功率分配控制  

Power distribution control of an island DC microgrid based on adaptive high-pass filter droop control

作　　者：喻思 米阳[1] 马宇辰 牛庆松 亓富军 彭静 YU Si;MI Yang;MA Yuchen;NIU Qingsong;QI Fujun;PENG Jing(Shanghai University of Electric Power,Shanghai 200090,China;State Grid Linyi Power Supply Company,Linyi 276002,China)

机构地区：[1]上海电力学院,上海200090 [2]国网临沂供电公司,山东临沂276002

出　　处：《电力系统保护与控制》2020年第18期19-26,共8页Power System Protection and Control

基　　金：国家自然科学基金项目资助(61873159);上海市科委项目资助(18020500700);上海绿色能源并网工程技术研究中心项目资助(13DZ2251900)“电气工程”上海市II类高原学科;上海市电站自动化技术重点实验室。

摘　　要：直流微电网孤岛运行时,由于不匹配线路阻抗及本地负荷因素的影响,传统“电压-功率”下垂控制难以使得各分布式电源按照下垂系数精确分配负荷功率。提出了一种基于自适应高通滤波下垂控制的孤岛直流微电网功率分配控制策略。通过在分布式电源下垂控制中引入采样保持器,根据采样保持器输出结果不断自适应地修改下垂系数,进而减小分布式电源实际输出功率与期望输出功率的偏差,同时高通滤波控制也有效提高了母线电压质量。最后基于RTDS仿真平台搭建不同工况下的实验模型,实验结果验证了所设计控制策略的有效性。For the islanded DC microgrid,it is difficult for the traditional"voltage-power"droop control to make the distributed generation to supply the load power accurately according to the droop coefficient.This is because of the unmatched line impedances and local loads.An island DC microgrid power allocation control strategy is proposed by using adaptive high-pass filtering droop control.By introducing the sample-and-holder,the droop coefficient is modified when the actual output power of DG deviates from the expected output power.At the same time,the high-pass filter control guarantees good bus voltage quality.Finally,based on the platform of RTDS,an experimental scheme under different working conditions is designed and the results verify the effectiveness of the proposed control strategy.

关 键 词：直流微电网 负荷功率分配 高通滤波控制 分布式电源 

分 类 号：TM73[电气工程—电力系统及自动化]