针对多机系统的经典数学模型，给出多机系统在角度中心下的状态空间方程及其暂态能量函数。
Secondly, Aiming at classical mathematics model of Multi-machine System, state equation and transient energy function are putted forward in the center of angle.
该模型考虑了配电网优化规划中存在的可靠性、线路走径、中间节点、线路型号与回数、多负荷状念、多运行状态、原有电网的改建等多个方面。
Reliability, paths of lines, middle nodes, circuit number and type of lines, rebuilding and multiple load and running states were considered in the novel model.
在初步分离结果的基础上，利用多模型融合滤波算法对故障进行精确定位并得到状态和故障的融合估计。
Then based on the primary isolation result, the fault is accurately located by the multiple-model fusion filtering algorithm, and the fused state and fault estimates are obtained as well.
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