基于直流激磁的半铁心可调电抗器

介绍了射阳河闸自动化系统的结构，详细介绍了其中复杂多样的闸门控制模式;针对闸门多模式控制的特点，分析了实现闸门分批控制（群控）的2个方案，重点讨论了一种运用顺控流程组态程序完成复杂控制程序的方法，这种方法为大型闸站的闸门多批次控制提供了参考;另外，讨论了射阳河闸自动化系统可行的几点改进措施。

Semi-core Variable Inductor Based on DC Excitation Field

This paper presents a design of variable inductor based on the orthogonal magnetization in order to reduce the amplitude of harmonic and exciting current created by traditional magnetization saturation inductor. Under the application of ac excitation field and dc bias field, the effective inductance can be changed. Experiment shows that the inductance decreases when the dc current increases. With an appropriate current in the orthogonal bias coils, an inductance plateau can be reached on which the inductance remains stable over a range of ac excitation currents, and the linearity of the magnetizing process can be maintained. In the paper, the orthogonal magnetization mechanism is analyzed. Furthermore, the harmonic characteristics are compared for two types of dc bias coils. The proposed inductor provides a good harmonic characteristic and needs less dc bias current.