In order to further improve the numerical stability of solution of equation, the orthogonal transformation technique based on PMU is used to solve the problem of state estimation.
为了进一步改善求解方程的数值稳定性，利用正交变换技术来求解状态估计问题。
In terms of state estimation, there are great differences between the innovation graph technique and the conventional methods on obtaining the topology configuration and identifying bad data.
新息图状态估计在拓扑结构获取和不良数据辨识方面与一般状态估计差异较大。
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