单相可控电抗器的一种谐波抑制原理及实现

新型单相可控电抗器近年来在电气化铁路动态无功补偿、自动调谐消弧线圈等方面得到了应用。减小单相应用条件下可控饱和类电抗器产生的谐波颇为困难，通常采用LC并联滤波装置，但效果不甚理想。该文提出单相应用条件下，可控电抗器的一种谐波抑帛方法，该方法将两组工作于不同电磁参数的单相可控电抗器并联，通过实施协调控制，可使每个并联单元（可控电抗器）所产生的谐波相经补偿，从而单相并联电抗器组的谐波水平大大降低。理论分析和实验结果证明了上述方法的有效性和可行性。

PRINCIPLE AND IMPLEMENTATION OF A HARMONIC DEPRESSION APPROACH FOR SINGLE-PHASE CONTROLLED SATURABLE REACTOR

Single phase controlled reactors have been used in many applications, such as dynamic var compensation in electrical railway power supply systems , adjustable arc extinguishing reactors ,et al. Generally it is difficult to damp the harmonics generated in the above mentioned controlled saturable reactors in single phase applications. A method for depressing the harmonics generated from a single phase controlled saturable reactor group is proposed. The technique employs two similar single phase controlled saturable reactors in shunt but with different electromagnetic parameters. With coordination control over the shunted reactors, the harmonics generated from each unit are compensated each other. As a result, the total harmonic level seen in the group is greatly decreased. Theoretical analysis and experimental results confirmed the effectiveness and feasibility of the proposed state of the art technique.The project is supported by Foundation for University Key Teacher by the Ministry of Education.