摘要
针对混合微电网谐波的频次丰富及在交直流侧相互传递等特点,提出了虚拟联合谐波抑制器的控制策略。以混合微电网中互联接口变换器的拓扑结构为主体,结合直流有源滤波器构成虚拟联合谐波抑制器,控制三相H桥的通断以生成交流侧谐波补偿电流,同时通过控制子网间功率流动和适时启动直流有源滤波器抑制直流纹波。搭建了MATLAB/SIMULINK仿真模型,结果表明,该控制策略在进行交流子网谐波补偿的同时,对直流母线电压纹波实现了二次补偿,实现了交直流侧谐波抑制系统的协同运行。该策略最大限度利用了互联接口变换器的容量,可降低装设谐波治理装置的成本。
In accordance with the harmonic characteristics of the hybrid microgrid,such as complex harmonic frequencies,and the characteristics that harmonics can be transmitted on the AC and DC sides,we proposed a control strategy of virtual united harmonic suppressor.Taking the topology of interlinking converters in hybrid microgrids as the main body and combining DC active filters to form a virtual united harmonic suppressor,we controlled the switching of the three-phase H-bridge to generate the AC-side harmonic compensation current.Meanwhile,the DC ripple was also suppressed by controlling the power flow between the subgrids or starting the DC active filter in a timely manner.A MATLAB/SIMULINK simulation model wass built.The simulation results show that this control strategy not only carries out the harmonic compensation of the AC subnet,but also realizes the secondary compensation of the DC bus voltage ripple,and realizes the coordinated operation of the harmonic suppression system on the AC and DC sides initially.This method maximizes the use of the capacity of the interlinking converters,which can reduce the cost of installing harmonic control devices.
作者
李占凯
岳怀瑜
张福民
李炬
吴启亮
宗川皓
LI Zhankai;YUE Huaiyu;ZHANG Fumin;LI Ju;WU Qiliang;ZONG Chuanhao(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin 300130,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第7期2307-2315,共9页
High Voltage Engineering
基金
国家自然科学基金(51677052)
河北省科技计划项目(16211827)
河北省高等学校科学技术研究项目(ZD2020133)。
关键词
混合微电网
虚拟联合
谐波抑制器
直流纹波电压
二次补偿
hybrid microgrid
virtual united
harmonic suppressor
DC ripple voltage
secondary compensation
