分级磁控电抗器谐波的数值分析与抑制研究

Numerical Analysis and Suppression Research of Harmonics of the Multi-stage Magnetically Controlled Reactor

为了减小磁控电抗器产生的谐波对公用电网的污染,使用分级磁阀结构抑制谐波输出,提出了基于离散时间函数的磁化曲线建模方法,提高磁控电抗器谐波分析的准确性,给出了分级磁阀结构的磁路等效模型,建立等效数值模型,利用粒子群算法对磁阀的级数、横截面积和长度等参数进行优化,使用Matlab对分级磁控电抗器编程仿真,仿真结果表明3级以上的磁阀结构能有效降低磁控电抗器的额定总谐波含量,7级及其以上的磁阀结构能有效的将额定总谐波含量降到5%以下。

In order to reduce the harmonics which pollutes the power grid generated by magnetically controlled reactor, multi-stage iron core was used to suppress the harmonics. A model of B-H curve based on discrete time function was proposed, which increased the accuracy of harmonic analysis. Equivalence magnetic path of multi-stage iron core was given and equivalence numerical model was built. For optimizing the construction of stage about quantity, area and length, PSO was used. After computer programming by Matlab, the result shows that three stages above can reduce the rated THD by MCR obviously. Rated THD of seven-stage MCR or above is decreased to less than 5%.