摘要
传统FCS-MPC策略在实际应用中存在在线计算量大的问题,并且计算量会随着拓扑结构以及被控目标的增加而增长。为此,本文研究了两种用于三电平并网变换器的简化有限控制集模型预测电流/功率控制策略。该方法结合了电压空间矢量等效变换的原理,引入了矢量扇区判断方法,求出三电平并网变换器的参考输出电压矢量,从其所处相关扇区的开关状态子集中选取以目标函数最优的开关状态,并直接作用于并网变换器。最后,仿真结果表明该方法在实际工程应用中具有一定的借鉴性。
In practical applications,the calculation load under the conventional finite control-set model predictive con.trol(FCS-MPC)strategy is heavy;moreover,with the increase of topological structures and controlled objects,the cal.culation load will increase as well.For this reason,two simplified finite control-set model predictive current/power con.trol strategies are proposed for a three-level grid-connected converter.With the combination of the principle of voltage space vector equivalent transformation and the introduction of a judgment method for vector sectors,a reference output voltage vector of the converter is obtained using the proposed method;and from the sub-set of switch states in the rele.vant sector where the vector exists,the switch state corresponding to the most optimal objective function is selected and directly used for the grid-connected converter.Finally,simulation results show that the proposed method has certain ref.erence values to practical engineering applications.
作者
王洋
程志江
李永东
WANG Yang;CHENG Zhijiang;LI Yongdong(College of Electrical Engineering,Xinjiang University,Urumqi 830008,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2018年第10期34-41,共8页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(51667020
51567022)
关键词
三电平并网变换器
有限集模型预测电流控制
有限集模型预测功率控制
控制目标函数
three-level grid-connected converter
finite control-set model predictive current control
finite control-set model predictive power control
control objective function
