A novel control scheme of 230kA DC power source using thyristor, Phase-shifting rectifier transformer and On-load tap changer

作者：Qiao Shutong^*; Jiang Jianguo; Zuo Dongsheng; Wu Xiaojie

来源：CES/IEEE 5th International Power Electronics and Motion Control Conference, China,Shanghai, 2006-08-14 to 2006-08-16.

• power source
• phase-shifting rectifier transformer
• control system
• parallel operation

This 230kA DC Power source is composed of four set separated DC power in parallel operation. There are +3.75 degrees,-3.75 degrees, +11.25 degrees, -11.25 degrees phase shifting between each rectifier transformer and original source. Each set device mainly contains on-load tap changer, phase-shifting rectifier transformer and con-phase counter parallel rectifier. In this paper, a current control scheme is realized based on SIEMENS corp. product. According to the required function, the hardware is chose and described, and the software is designed and realized. The design control system is organized by current control level, logic control level and human level. The relation between these levels is determined. The system is validated by electrolytic aluminum plant. From the measured data, the current control precision can reach 0.1% in dynamic process. The rectifier efficiency is more than 97.5%. The whole control device's realized zero current changing on-load tap changer. This developed DC power source can utilize for electrochemical, electro winning, plasma torches etc.

• 出版日期2006
• 单位上海交通大学