摘要
针对三相并网逆变器传统三矢量预测电流控制计算复杂度高和稳态性能不佳的问题,提出了一种低复杂度的三矢量预测电流控制算法。首先,将传统并网电流跟踪控制转换为逆变器电压跟踪控制,并利用无差拍原理计算了逆变器电压参考值。其次,提出了一种最优矢量快速选择策略以及基于逆变器电压参考跟踪误差最小化的最优占空比计算方法,有效降低了实现复杂度。最后,搭建了实验平台,实验结果表明:所提策略在有效降低计算量的同时,可显著提升系统的稳态并网性能,大大降低并网电流谐波。
To solve the problem of high computational complexity and poor steady-state performance of traditional three-vector predictive current control for three-phase grid-connected inverters,a low-complexity three-vector predic-tive current control algorithm is proposed.Firstly,the traditional grid-connected current tracking control is converted into inverter-voltage tracking control,and the inverter voltage reference value is calculated by the deadbeat principle.Secondly,an optimal-vector fast selection strategy and an optimal duty cycle calculation method based on minimizing the inverter voltage reference tracking error are proposed,which effectively reduces the computational complexity.Fi-nally,the experimental platform is built.The experimental results show that the proposed strategy can significantly im-prove the steady-state grid-connected performance of the system while effectively reducing the calculation amount and greatly reducing the harmonics of the grid-connected current.
作者
丁朝辉
姚斐
郑长明
韩文笏
DING Chao-hui;YAO Fei;ZHENG Chang-ming;HAN Wen-hu(State Grid Jiangu Electric Power Co.,Lid,Zhenjiang Power Supply Company,Zhenjiang 212000,China;School of Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China)
出处
《电力电子技术》
2025年第3期6-10,共5页
Power Electronics
基金
国家自然科学基金(52107217)
国网江苏省电力有限公司省管产业科技项目(JC2024044)。
关键词
并网逆变器
低复杂度:三矢量
grid-connected inverter
low-complexity
three-vector
