摘要
针对电网不平衡条件,提出了一种预测功率控制策略。采用信号延迟法对电压、电流正负序分量进行提取;对电网电压平衡与不平衡条件下的预测功率进行对比分析,采用功率补偿方式消除负序电流,降低瞬时功率的波动振荡。该策略以功率跟踪误差最小作为控制目标,计算期望交流侧电压矢量,导入空间矢量脉宽调制中以形成闭环控制系统。在电网电压不平衡条件下,该策略响应速度快、鲁棒性好,能够有效抑制电流负序分量,降低电流中的谐波分量。利用Matlab/Simulink软件对Vienna整流器进行分析,验证了新策略的有效性。
At present,most of the research on the control strategy of the three-phase Vienna rectifier is carried out under the condition of grid balance,and the research on the control strategy under the condition of unbalanced grid is less.In this paper,a predictive power control strategy is proposed under the condition of unbalanced power grid.First,the signal delay method is used to extract the positive and negative sequence components of voltage and current,and then the predicted power is compared and analyzed under the condition of grid voltage balance and unbalance,power compensation is used to eliminate negative sequence current and reduce the fluctuation and oscillation problem of instantaneous power.This strategy satisfies the minimum power tracking error as the control objective,calculates the desired AC side voltage vector,and introduces it into the space vector pulse width modulation to form a closed-loop control system.Under the condition of unbalanced grid voltage,the strategy has fast response speed,good robustness,and can effectively suppress the negative sequence component of the current,thereby reducing the harmonic component in the current.Finally,the Vienna rectifier is verified and analyzed by Matlab/Simulink software.
作者
肖蕙蕙
向文凯
张路
郭强
陈岚
XIAO Huihui;XIANG Wenkai;ZHANG Lu;GUO Qiang;CHEN Lan(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Energy Internet Engineering Technology Research Center,Chongqing University of Technology,Chongqing 400054,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2022年第7期216-222,共7页
Journal of Chongqing University of Technology：Natural Science
基金
重庆市教委科学技术研究项目(KJQN202001128)
重庆市教委雏鹰计划研究项目(CY210909)
重庆理工大学研究生创新重点项目(clgycx20201004)。
