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引用次数: 0
摘要
模块化多电平矩阵变流器可为远程交流电网提供频率控制支持,在高压低频交流输电系统中具有良好的应用前景。然而,传统外环 PI 控制器的动态性能易受自身参数和外部条件变化的影响,进而影响控制效果。因此,本文提出了一种变宇宙模糊比例积分(PI)自适应外环控制策略。利用可变宇宙模糊控制的自动感应和自适应能力,实现了外环输入误差大小的自适应和自调整。同时,利用基于函数的缩放因子方法为输入域和输出域制定缩放因子,以提高控制精度。仿真和实验结果表明,与现有方法相比,该控制策略提高了系统稳定性,并增强了外环控制的自适应调节能力。
M3C outer loop control strategy based on variable universe fuzzy PI control
The modular multilevel matrix converter can provide frequency control support for remote AC power grids and has good application prospects in high-voltage low-frequency AC transmission systems. However, the dynamic performance of the traditional outer-loop PI controller is susceptible to changes in its own parameters and external conditions, which in turn influences the control effect. Therefore, a variable universe fuzzy proportional-integral (PI) adaptive outer-loop control strategy is proposed in this paper. Using the automatic sensing and self-adaptive capability of variable universe fuzzy control, the self-adaptation and self-adjustment of the size of the input error of the outer loop is achieved. Meanwhile, a function-based scaling factor approach is utilized to develop scaling factors for the input and output domains to enhance the control accuracy. Simulation and experimental findings demonstrate that this control strategy advances system stability and reinforces the self-adaptive adjustment capability of outer-loop control when compared to preexisting approaches.
期刊介绍:
The scope of Journal of Power Electronics includes all issues in the field of Power Electronics. Included are techniques for power converters, adjustable speed drives, renewable energy, power quality and utility applications, analysis, modeling and control, power devices and components, power electronics education, and other application.