The teclinique ofvarying order and step size of integration is researched according to thetrUncation error controI. The study results have established the theorybases for the numerical integral methods of the full dynandc simulation.

• 并研究了根据积分的截断误差控制，自动变阶变步长的技术，为电力系统全过程动态仿真技术中的数值积分方法奠定了坚实的理论基础。