基于多目标优化的机组一次调频自抗扰控制

Active Disturbance Rejection Control Based on Multi Objective Genetic Algorithm for Primary Frequency Modulation

燃气轮机的一次调频能力对于电网频率的稳定十分重要。针对燃气轮机一次调频的控制问题,提出了基于多目标遗传算法的自抗扰控制策略。首先提出了一种基于输出量直接反馈的自抗扰控制结构,并推导出其参数稳定域的计算公式。在介绍NSGA-Ⅲ多目标遗传算法的基础上,提出了基于多个控制性能指标的多目标参数优化流程,并将该方法应用于燃气轮机机组的一次调频控制策略设计中。仿真结果表明,提出的基于多目标遗传算法的自抗扰控制策略在保证鲁棒性的前提下能够提高燃气轮机机组一次调频的性能,显示了很好的应用前景。

The primary frequency modulation capability of gas turbine is important for the frequency stability of power grid.In view of the control of the primary frequency modulation of gas turbine and an active disturbance rejection control(ADRC)strategy based on multi-objective genetic algorithm was proposed.Firstly,an ADRC structure based on the output direct feedback was proposed and the calculation formula of its parameter stability region was derived.Based on the introduction of NSGA-Ⅲmulti-objective genetic algorithm,a multi-objective parameter optimization method based on multiple control performance indexes was proposed,and then the proposed method was applied to the control strategy design for primary frequency modulation of gas turbine unit.The simulation results indicate that the proposed ADRC strategy based on multi-objective genetic algorithm can improve the control performance of primary frequency modulation of gas turbine unit with satisfactory robustness,and this shows that the proposed control strategy has a good application prospect.