绝缘栅双极型晶体管（IGBT）模块作为风电机组发电系统功率变流器的核心组件,优化其导电性能和制造成本意义重大。为解决这一问题,提出一种基于改进非支配排序遗传算法（NSGA-Ⅱ）的风电机组变流器IGBT模块快速迭代优化设计方法。首先,定义以其导电性能和制造成本为优化目标的优化问题,并构建了参数化热电耦合模型,实现了导电性能的精确快速求解;随后,提出基于核密度估计的改进NSGA-Ⅱ算法,通过与传统优化算法对比,改进算法显著提高了计算效率与优化精度。此外,为减轻计算负担,引入克里金（Kriging）代理模型技术构建了设计变量与优化目标间的高精度代理模型,从而实现了快速迭代优化设计。优化结果表明,该方法最多可将导电损耗减少20.00%,制造成本最多可节约27.63%。
Abstract
Insulated-gate bipolar transistor （IGBT） modules, as the core power components of wind turbine power converters, are crucial for achieving high operational efficiency and cost-effectiveness. Optimizing the electrical conductivity and manufacturing cost of these modules is essential. However, the demanding operational environments often cause performance degradation, and traditional design optimization methods incur high computational costs, making rapid iterative optimization difficult. To address these limitations, this study proposes a rapid iterative design optimization method for wind turbine converter IGBTs based on an improved NSGA-Ⅱ algorithm （Non-dominated Sorting Genetic Algorithm Ⅱ）. Firstly, the optimization problem is formulated with electrical conductivity and manufacturing cost as dual objectives. A parametric thermoelectric coupling model is developed to enable accurate and efficient evaluation of conductivity under varying design conditions. To further enhance the optimization process, an improved NSGA-Ⅱ algorithm based on kernel density estimation is proposed, significantly improving computational efficiency and optimization accuracy compared to traditional optimization algorithms. Additionally, a Kriging-based surrogate model is employed to construct high-fidelity mappings between design variables and optimization objectives, thereby reducing computational burdens and enabling rapid iterative optimization. Numerical experiments confirm the effectiveness and robustness of the proposed method, demonstrating reductions in electrical losses of up to 20.00% and decreases in manufacturing costs by as much as 27.63%. This study provides a practical and efficient design framework for IGBT modules, offering valuable insights into multi-objective optimization in the field of power electronics. By integrating advanced optimization algorithms with surrogate modeling, the proposed method addresses key challenges in the design and performance enhancement of wind turbine power systems.
关键词
绝缘栅双极型晶体管 /
风力发电机组 /
变流器 /
NGSA-Ⅱ算法 /
核密度估计 /
优化算法
Key words
IGBT /
wind turbines /
power converters /
NSGA-Ⅱ algorithm /
kernel density estimation /
optimization algorithm
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基金
国家自然科学基金（52275275）; 浙江省“尖兵”“领雁”研发攻关计划（2023C01008）
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