梅杨, 张家奇. 基于无差拍预测算法的双向隔离型AC-DC矩阵变换器高动态电流控制策略[J]. 高电压技术, 2024, 50(3): 1090-1099. DOI: 10.13336/j.1003-6520.hve.20230793
引用本文: 梅杨, 张家奇. 基于无差拍预测算法的双向隔离型AC-DC矩阵变换器高动态电流控制策略[J]. 高电压技术, 2024, 50(3): 1090-1099. DOI: 10.13336/j.1003-6520.hve.20230793
MEI Yang, ZHANG Jiaqi. High Dynamic Current Control Strategy for Bidirectional Isolated AC-DC Matrix Converter Based on Deadbeat Predictive Algorithm[J]. High Voltage Engineering, 2024, 50(3): 1090-1099. DOI: 10.13336/j.1003-6520.hve.20230793
Citation: MEI Yang, ZHANG Jiaqi. High Dynamic Current Control Strategy for Bidirectional Isolated AC-DC Matrix Converter Based on Deadbeat Predictive Algorithm[J]. High Voltage Engineering, 2024, 50(3): 1090-1099. DOI: 10.13336/j.1003-6520.hve.20230793

基于无差拍预测算法的双向隔离型AC-DC矩阵变换器高动态电流控制策略

High Dynamic Current Control Strategy for Bidirectional Isolated AC-DC Matrix Converter Based on Deadbeat Predictive Algorithm

  • 摘要: 针对双向隔离型AC-DC矩阵变换器采用传统双闭环控制策略存在的控制参数多、整定困难等问题,提出了一种基于无差拍预测算法的高动态电流控制策略,通过引入无差拍预测算法对网侧电流进行控制,以减少控制器参数,消除数字控制时延。考虑到算法中电压电流检测量众多,故采用输入电压观测器以降低检测成本,减小采样误差的影响。变换器采用后级单重移相的调制方法来协调配合无差拍预测算法,其中参考输入电流指令与移相角为双射函数关系,简单易实现。仿真和实验结果表明:采用所提控制策略可以实现网侧电流正弦,功率因数接近于1;直流侧电压稳定,电流纹波率小于1%;直流电流在参考值突变时,跟踪快速且无超调、无振荡;同时,在变换器功率正向传输、反向传输以及正反向切换过程中,采用所提控制策略相比于传统的双闭环控制策略,电流动态调节时间分别缩短了69%、85%、67%。由此证明所提控制策略可以保证变换器良好的输入输出性能,并且相比于传统的双闭环控制策略在切换过程中动态性能得到显著提升。

     

    Abstract: In the conventional double -closed-loop control strategy for the bidirectional isolated AC-DC matrix converter, many control parameters are overmany and it is difficult to be tuned. In order to solve these problems, a high dynamic current control strategy based on deadbeat predictive algorithm is proposed in this paper. In the proposed strategy, a deadbeat predictive algorithm is introduced for the grid currents control, by which the controller parameters are reduced and digital control delay is eliminated. A large number of voltage and current detection in the algorithm are taken into account, and the input voltage observer is used to reduce the detection cost and the impact of sampling errors. The transducer uses a single phase shift method to coordinate with the deadbeat predictive algorithm. The reference input current and the phase shift angle are bijective functions, and the method is simple and easy to implement. Simulation and experimental results show that the proposed control strategy can achieve the sinusoidal grid currents and a unity power factor. The DC voltage is stable with a current ripple rate of less than 1%. Fast-tracking is realized with no overshoot and no oscillation when the DC current changes abruptly at the reference value. Meanwhile, the proposed control strategy reduces the current dynamic adjustment time by 69%, 85% and 67%, respectively, compared with the conventional double-closed-loop control strategy during the forward and reverse power transfer and forward and reverse switching of the converter. It can be verified that the proposed control strategy can ensure good input and output performance of the converter and significantly improve the dynamic performance in the switching process compared with the conventional double-closed-loop control strategy.

     

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