楼宇直流微网用直流母线功率分级控制的新型多输入直流变换器研究  

Energy Management of MIC Building DC Micro-grid on DC Link Power Level Control

作　　者：易灵芝[1,2] 范明辉[1,2] 李卫平[3] 李济君[1,2] 李果[1,2] 

机构地区：[1]智能计算与信息处理教育部重点实验室(湘潭大学),湘潭411105 [2]湖南省风电装备与电能变换2011协同创新中心,湘潭411101 [3]惠州学院电子科学系,广州516007

出　　处：《电源学报》2016年第1期43-51,共9页Journal of Power Supply

基　　金：国家自然科学基金项目"基于自动需求响应的多功能互补智能楼宇全直流微网动态优化"(61572416);湖南省教育厅平台项目"小功率新型开关磁阻风力发电装备中关键技术研究"(14K095);湖南省"十二五"重点学科"信息与通信工程"资助项目~~

摘　　要：针对传统多输入变换器存在的输入/输出电压反极性、分布式能源汇集结构复杂等问题,提出一种新型多输入直流Buck-Boost变换器,有效实现楼宇直流微网中的风光混合供电,且将蓄电池直接嵌入变换器中,减小体积和降低成本。该变换器具有电路拓扑简洁、可实现升/降压、输入/输出电压同极性、各种分布式输入源可单独或同时向负载供电、蓄电池能根据负载功率变化吸收或释放功率等优点。以三输入为例分析了变换器的工作模式、推导其输入输出特性、提出基于直流母线功率的分级控制实现能量管理。通过Matlab/Simulink平台的仿真实验验证了该变换器的可行性和控制策略的有效性。Aiming at the problem for reverse polarity of input and output voltage in traditional multi-inputs converter,and complex structure in the distributed energy collection,a new multiple-inputs Buck-Boost converter is proposed for building DC micro-grid, which wind-solar hybrid power supply is effectively realized, battery is embed in converter directly, so the volume can be reduced and the cost is lower. It has many advantages, such as simple circuit topology, Boost and Buck, the same polarity of input and output voltage, and the power supply of input source alone or simultaneously, and the battery absorb or release power according to the changes of load. A three-input Buck-Boost DC/DC converter is analyze for its operating modes, input/output characteristics were derived, and DC link power level control is proposed to energy management. The experiment results on Matlab/Simulink platform verify the feasibility of theoretical analysis and the correction of new control strategy.

关 键 词：BUCK-BOOST变换器 直流楼宇微网 分布式电源 功率分级控制 

分 类 号：TM46[电气工程—电器]