Aiming at the nonlinear noise distribution is unknown but bounded discrete power system, in order to improve the computational efficiency, this paper puts forward a method of power system nonlinear high order error bound processing method and considering the linearization error boundary. First of all, the nonlinear state equation and measurement equation are carry out Taylor series expansion, linear analysis method using interval is integrated into the system error ellipsoid set, on this basis, time update strategy and measurement update strategy are renewed. The simulation results show that the robustness of the algorithm is good.%针对噪声未知分布但有界的非线性系统,为了提高系统计算效率,提出一种通过对非线性系统的高阶误差项进行定界处理并考虑线性化误差边界的方法.首先,对非线性状态方程和量测方程进行泰勒级数展开,利用区间分析法进行线性化处理,将系统误差整合到椭球集合中,在此基础上进行时间更新策略和测量更新策略.分析仿真结果表明了该算法良好的鲁棒性.
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