三相电压源型逆变器的多目标满意优化脉宽调制策略

发布时间：2018-01-03 04:22

本文关键词：三相电压源型逆变器的多目标满意优化脉宽调制策略　出处：《中国电机工程学报》2016年06期 　论文类型：期刊论文

【摘要】：提出了一种基于伏秒平衡方程组特解在线规划的新型多目标满意脉宽调制策略(multi-objective satisfactory optimization PWM,MSO-PWM)。首先,针对单个载波周期内线性调制范围扩展、输出电流纹波损耗与开关损耗3个优化目标分别建立了时域数学规划模型,并求解各自的全局最优解,实现了单个目标的全局最优化。通过对3个目标的全局最优解的分析,揭示了不同优化目标之间矛盾的本质原因,通过引入满意优化的思想,以多目标满意取代单目标最优,并通过目标满意度松弛避免了因目标矛盾而出现的无解问题,最终实现了3个目标的整体满意优化。相对于现有的单目标局部优化PWM,所提出的MSO-PWM能够根据决策者偏好信息通过调整开关损耗系数界限来灵活地调整各控制目标的重要性,在偏重优化某个目标的同时兼顾其他目标,实现多个目标的满意优化,以满足现代逆变器系统越来越多的设计要求,具有很强的通用性和灵活性。实验结果验证了MSO-PWM的正确性与灵活性。
[Abstract]:In this paper, a novel multi-objective satisfactory pulse width modulation strategy based on the special solution of Voltage-second equilibrium equations is proposed. Multi-objective satisfactory optimization PWM. First of all, for the linear modulation range expansion in a single carrier cycle, the output current ripple loss and switching loss are optimized to establish the time domain mathematical programming model respectively. Through the analysis of the global optimal solution of the three objectives, the essential reason of the contradiction between the different optimization objectives is revealed. By introducing the idea of satisfactory optimization, the single-objective optimization is replaced by multi-objective satisfaction, and the problem of non-solution caused by goal contradiction is avoided through the relaxation of goal satisfaction. Finally, the overall satisfactory optimization of the three objectives is achieved. Compared with the existing single-objective local optimization PWM. The proposed MSO-PWM can flexibly adjust the importance of each control objective according to the preference information of the decision maker by adjusting the threshold of the switching loss coefficient, while focusing on the optimization of one goal and taking other objectives into account. In order to meet more and more design requirements of modern inverter system, it has strong generality and flexibility. The experimental results verify the correctness and flexibility of MSO-PWM.
【作者单位】：中国矿业大学信息与电气工程学院;
【分类号】：TM464
【正文快照】： 化目标分别建立了时域数学规划模型,并求解各自的全局最优解,实现了单个目标的全局最优化。通过对3个目标的全局最优解的分析,揭示了不同优化目标之间矛盾的本质原因,通过引入满意优化的思想,以多目标满意取代单目标最优,并通过目标满意度松弛避免了因目标矛盾而出现的无解问

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