基于双层级联模型预测电流控制的零序环流抑制策略  

Zero-sequence Circulation Suppression Strategy Based on Double Cascade Model Predictive Current Control

作　　者：杨金东 刘红文 杨泽宇 荣飞[2] YANG Jindong;LIU Hongwen;YANG Zeyu;RONG Fei(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650000,China;College of Electrical and Information Engineering,Hunan University,Changsha 410000,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650000 [2]湖南大学电气与信息工程学院,湖南长沙410000

出　　处：《智慧电力》2024年第10期88-95,共8页Smart Power

基　　金：国家自然科学基金资助项目(52277045);云南电网公司科技项目(0510002023030301SC00075)。

摘　　要：逆变器并联系统在运行过程中,由于功率分配不均、控制参数失配等因素导致两逆变器开关状态不同步,使得环路中产生零序环流。为此,提出一种基于双层级联模型预测电流控制的零序环流抑制策略,通过将零序环流加入综合目标函数,选取最优开关状态组合实现零序环流的抑制。同时,通过改变目标函数结构、利用双层级联的方式进行开关状态组合选取,在消除权重系数对控制系统影响的同时减轻计算负担。最后,通过仿真和试验验证了所提控制策略的有效性。During the operation of the inverter parallel system,due to some factors such as uneven power distribution and mismatched control parameters,the switch state of the two inverters are not synchronized,resulting in zero sequence circulating current in the loop.Therefore,this article proposes a zero sequence circulating current suppression strategy based on double cascade model predictive current control.By adding zero sequence circulating current to the comprehensive objective function and selecting the optimal switch state combination,the zero sequence circulating current suppression is achieved.At the same time,by changing the objective function structure and implementing a double cascade to select the switch state combination,the influence of weight coefficients on the control system is eliminated while reducing computational burden.Finally,the effectiveness of the control strategy is verified through the simulation and experimentation by MATLAB/Simulink.

关 键 词：低压配电网 并联逆变器 零序环流 有限集模型预测控制 

分 类 号：TM464[电气工程—电器]