交流微电网接口变换器控制策略研究  

Research on Control Strategy of AC Microgrid Interface Converter

作　　者：郭清香 国海 徐锐 GUO Qingxiang;GUO Hai;XU Rui(College of Mechanical Engineering,Anhui Science and Technology University,Fengyang Anhui 233100,China)

机构地区：[1]安徽科技学院机械工程学院,安徽凤阳233100

出　　处：《佳木斯大学学报（自然科学版）》2021年第5期47-51,68,共6页Journal of Jiamusi University：Natural Science Edition

摘　　要：微电网与传统大电网可实现有机互补,充分利用可再生能源发电。接口变换器作为分布式电源(DG)接入微电网的关键设备,其控制特性直接决定了DG的发电效率。目前,微型燃气轮机发电系统(MTGS)需要通过交-直交两级变换向微电网交流母线供电。利用矩阵变换器(MC)作为交流母线与MTGS的接口变换器,设计了双空间矢量控制策略,对电流进行闭环控制,同时,利用MC能量的双向流动控制,将交流母线电能作为MTGS启动电源,省去了变频启动电源,发电工况下,实现了交-交直接变换,从而提高MTGS的发电效率,通过系统仿真,验证了所提控制策略的有效性。Micro-grid and traditional large-scale power grid can achieve organic complementary,make full use of renewable energy for power generation.Interface converter is the key device for distributed power supply(DG)to connect to microgrid.Its control characteristics directly determine the DG’s power generation efficiency.At present,the micro gas turbine power generation system(MTGS)needs to supply power to the AC bus of the micro-grid through the AC-DC two-stage transformation.In this paper,using matrix converter(MC)as the interface converter between AC bus and MTGS,a dual space vector control strategy is designed to close-loop control the current.At the same time,using the two-way flow control of MC energy,the AC bus power is used as MTGS startup power supply,eliminating the variable frequency startup power supply,and realizing the direct AC-AC transformation under the power generation condition,thus improving the MTGS power generation.The validity of the proposed control strategy is verified by system simulation.

关 键 词：微型燃气轮机发电系统 矩阵变换器 微电网 双空间矢量控制 

分 类 号：TM464[电气工程—电器]