在HL-2A等离子体放电过程中,利用CF编码计算出的等离子体边界磁场,计算出Shafranov积分S1,S2和S3,再利用反磁磁通导出极向比压βp,等离子体内自感li,等离子体磁轴的大半径Rm,等离子体的能量Wdia,能量约束时间τE;再用电流矩导出等离子体的电流中心(Rc,Zc).实时确定这些量对于及时了解和改进装置的放电和改善等离子体性能很有意义. In the process of HL-2A plasma discharge, the Shafranov integrals S1, S2 and S3 are calculated by using the plasma boundary magnetic field calculated by CF code to derive the polar pressure βp and the plasma intrinsic inductance li, The large radius of the plasma magnetic axis, Rm, the plasma energy, Wdia, and the energy confinement time, τE, are then used to derive the current center of the plasma (Rc, Zc) .Determination of these quantities in real time is essential for timely understanding and improvement of device discharge and improvement Plasma performance makes sense.