级联STATCOM抑制电弧炉系统电压闪变的在线SPEA-II遗传算法

IF 4.2 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-04-03 DOI:10.1016/j.epsr.2025.111667

Kevin Liu, Fei Wang, Chen Xu

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引用次数: 0

摘要

级联式静态同步补偿器是抑制中压电弧炉电网电压闪变的有效方法。将振荡有功功率指令转换为无功功率指令的方法可以在子模块电容较小的情况下实现良好的抑制效果。然而，这种转换的准确性强烈依赖于网格阻抗参数。本文提出了一种基于在线人工智能的强化帕累托进化算法-ⅱ遗传算法来动态优化虚拟电网阻抗参数，在电容器电压纹波和开关电流限制的约束下尽可能抑制电网电压闪变。计算得到的虚拟网格参数是时变的，能很好地适应网格参数漂移的情况，易于在实际应用中实现。通过一系列精心设计的模拟，获得了一个实际工业现场熔化期间20 ~ 70 MVA电弧炉电流数据，证明了该算法的优点。与传统方法相比，该方法在固定栅格参数和漂移栅格参数条件下的平均瞬时闪变值分别降低了6.62%和20.32%。

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An online SPEA-II genetic algorithm for cascaded STATCOM suppressing voltage flicker in electric arc furnace system

The cascaded static synchronous compensator is an efficient solution to suppress the gird voltage flicker in medium-voltage arc furnace systems. The method of transforming the oscillating active power command to reactive power command could achieve a good suppression effect with relatively small submodule capacitance. However, the accuracy of this transformation strongly relies on grid impedance parameters. This paper proposed an online artificial intelligence based strengthen pareto evolution algorithm-II genetic algorithm to optimize the virtual grid impedance parameters dynamically, in the constraint of the capacitor voltage ripple and switch current limitations to suppress the gird voltage flicker as much as possible. The calculated virtual grid parameters are time-varying quantities and well adaptive to the grid parameter drift scenario, and estimated to be easily implemented in the practical use. The merits of the proposed algorithm are demonstrated by a series of carefully designed simulations, where the 20 s 70 MVA arc furnace current data during the melting period is acquired from a practical industrial site. With our proposed method, the average instantaneous flicker values decrease 6.62 % and 20.32 % under constant grid parameter and drifted grid parameter conditions respectively, compared with the conventional method.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.