等离子体电流保护在EAST控制系统中的应用

Application of plasma current protection in controlling system of EAST Tokamak

EAST(Experimental Advanced of conducting Tokamak)是我国自主研发的世界上第一个全超导托卡马克装置系统。全超导托克马克系统有独特的运行特性和更高的运行风险,需要更加严密而有效的安全监测和保护系统。本文介绍的等离子体电流保护系统具有等离子体电流的检测功能,若等离子体出现异常状况,如破裂,引起等离子体电流截止,系统会使极向场电源系统和微波加热系统以快速方式退出,而不是出于继续工作状态,从而及时地保护EAST的极向场电源系统、磁体以及EAST装置。系统已在2009年4月的EAST实验中成功投入使用。

EAST（Experimental Advanced of conducting Tokamak）is the first superconducting Tokamak device system in the world studied and developed by our country.The superconducting Tokamak system boasts unique running characteristics and higher running risks.Thus,it needs more rigorous and effective protecting system.The plasma current cut-off system introduced in the paper possesses the function of plasma current-detecting.When plasma cuts off unexpectedly due to some abnormity of plasma,such as breaking,the system protects PF Magnet Power Supply（MPS）,magnet and EAST device on time,by making MPS and the microwaveheating system exit in the fast model rather than keeping working.The system has been successfully applied in the EAST experiment in April,2009.