ABSTRACT

This manuscript proposes to improve the use of space vector modulation (SVM) AC-DC matrix converter and fuzzy logic controller (FLC) based type I type II switching method to diminish the ripple of DC in this environment. The SVM strategy can optimize the zero vector duty cycle. The Type I and Type II FLC can recognize the error and send the correct signal to identify the pulse. Battery Energy Storage System (BESS) technology is the forefront of power generation and proves to be the most efficient and cost-effective. The ripple current flowing to the battery during charging interacts with the internal resistance of the battery to generate heat (I²R losses). Therefore, excessive ripple current reduces the service life of the battery and requires a high-performance Alternating Current (AC)/Direct Current (DC) matrix converter topology to achieve high efficiency with low ripple current. The AC-DC matrix converter facilitates that the bi-directional interconnection between the utility grid and relatively minimum voltage DC source/load. AC-DC matrix converter generates minimum ripples at DC current and minimal THD at AC current for satisfying grid codes and DC source/load demands. The study also compares the performance of DC current ripple with Current source converter (CSC), Back to Back converter (BBC) and T₁-T₂ Fuzzy-logic-based switching system for enhanced AC/DC matrix converter. The simulation outcomes demonstrate that the proposed enhanced AC-DC matrix converter is more efficient to reduce ripples compared to the existing converters, and controls the power according to the current requirement. The efficiency of the proposed system achieves optimal result of power efficiency. The efficiency of the proposed system is 98%. Also the ripple factor DC link current of the proposed technique for 1mH is 96%, 1.6mH is 78% and 2.5mH is 60%.

摘要

本手稿建议改进空间矢量调制 (SVM) AC-DC 矩阵转换器和基于模糊逻辑控制器 (FLC) 的 I 型 II 型开关方法的使用，以减少这种环境中的 DC 纹波。SVM 策略可以优化零向量占空比。Type I 和 Type II FLC 可以识别错误并发送正确的信号来识别脉冲。电池储能系统 (BESS) 技术是发电的前沿技术，被证明是最高效和最具成本效益的。充电时流向电池的纹波电流与电池内阻相互作用产生热量（I ²R 损失）。因此，过大的纹波电流会降低电池的使用寿命，需要高性能的交流（AC）/直流（DC）矩阵转换器拓扑结构以实现低纹波电流的高效率。AC-DC 矩阵转换器促进了公用电网和相对最低电压的 DC 电源/负载之间的双向互连。AC-DC 矩阵转换器在 DC 电流下产生最小纹波，在 AC 电流下产生最小 THD，以满足电网规范和 DC 电源/负载需求。该研究还比较了直流电流纹波与电流源转换器 (CSC)、背对背转换器 (BBC) 和 T ₁ -T _{2 的性能}用于增强型 AC/DC 矩阵转换器的基于模糊逻辑的开关系统。仿真结果表明，与现有转换器相比，所提出的增强型 AC-DC 矩阵转换器更有效地减少纹波，并根据电流要求控制功率。所提出系统的效率达到了电源效率的最佳结果。建议系统的效率为 98%。此外，1mH 的建议技术的纹波系数 DC 链路电流为 96%，1.6mH 为 78%，2.5mH 为 60%。