基于预励磁技术的船用变压器励磁涌流控制

Magnetizing Inrush Current Control of Ship Transformer Using Pre-exciting Technology

在采用中压配电系统的船舶上,通常采用中压/低压变压器实现对低压负载的供电,该变压器的容量相对于船舶电力系统来说很大,当变压器投入运行的时候在变压器原边会产生非常大的浪涌电流,其幅值可达到变压器额定电流的十倍以上,对船舶电力系统的安全运行以及变压器本身造成危害。论文分析了变压器励磁涌流产生的机理和特性,认为涌流是由于变压器空载投入时的饱和特性造成的,分析了采用预充磁技术的涌流抑制原理和方法,并经过仿真和实验对涌流抑制效果进行了验证。

In the ship with medium voltage in the electric power system, low voltag loads are fed by a large power transformer . When switching on, the primary side of transformer will produce very high current, which would endanger the safe operation of power for ships. The mechanism and characteristics of magnetizing inrush current are analyzed when the transformer switches with no load. We think that the reason caused magnetizing inrush current is transformers saturation. Pre-excitation is presented through a small volume transformer magnetizing method of suppressing the inrush current of transformer, and the effect of suppressing the inrush current of transformer is validated by simulation and experiments.