我明明没有这个方程port_b.m_flow = 0.0;
只设定了port_b.m_flow = OUTanode_F;，但是仿真时却显示我重复设定方程
equation
port_b.m_flow=OUTanode_F;
port_b.p=OUTanode_P;
port_b.h_outflow=h_anode;
port_b.Xi_outflow = {OUTanodez_H2O, OUTanodez_KOH, OUTanodez_O2};
h_anode=OUTanode_h/MW_anode*1000000;