不平衡输入三相-单相矩阵变换器电流解耦控制策略

发布时间：2018-03-01 12:25

本文关键词： 三相-单相矩阵变换器电流解耦不平衡正序负序加权合成　出处：《工程科学学报》2017年06期 　论文类型：期刊论文

【摘要】：分析了三相-单相矩阵变换器(3-1MC)输入侧低次谐波的产生原因,推导了功率补偿拓扑结构下的输出侧与补偿侧调制函数约束关系式.研究输入电压不平衡下,含电容补偿单元的3-1MC单网侧电流反馈控制策略无法对输入两相旋转坐标轴(dq轴)下的直轴与交轴电流分量实现无静差控制,提出了在功率补偿下对输入三相电流作正序、负序dq轴分解,分别独立对输入双dq轴下正序、负序电流作解耦内环,输出侧与补偿侧电压加权合成为外环的双闭环控制.实验与仿真结果均表明该策略不仅使3-1MC具有功率补偿功能,而且有效抑制了电压不平衡引起的输入电流与输出电压所含低次谐波,提高了3-1MC在单相用电场合的实用性.
[Abstract]:The causes of low order harmonics at input side of three-phase single-phase matrix converter (MMC) are analyzed, and the constraint relationship between output side and compensation side modulation function in power compensation topology is derived. Under unbalanced input voltage, the constraint relationship between output side and compensation side is derived. The 3-1MC single-side current feedback control strategy with capacitive compensation unit can not realize the static error control of the current components of the straight axis and the cross axis under the input two-phase rotation axis / dq axis. A positive sequence of the input three-phase current is proposed under the power compensation. The negative sequence DQ axis is decomposed, and the positive sequence and negative sequence current under the input double dq axis are separately decoupled inner loop. The output side and compensating side voltage weighted combination are double closed loop control with outer loop. Experimental and simulation results show that this strategy not only makes 3-1MC have power compensation function, Furthermore, the low order harmonics caused by the unbalanced voltage and the input current are effectively suppressed, and the practicability of the 3-1MC in single-phase electrical applications is improved.
【作者单位】：南京航空航天大学自动化学院;湖州师范学院工学院;
【基金】：国家自然科学基金资助项目(U1233127)
【分类号】：TM46

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