Givens正交变换法状态估计中基于VPAIR消元的改进策略

发布时间：2018-03-13 19:00

本文选题：状态估计　切入点：正交变换　出处：《电力自动化设备》2017年10期 　论文类型：期刊论文

【摘要】：Givens正交变换法是提高电力系统状态估计数值稳定性的有效方法,但是在变换过程中出现的大量非零注入元影响了其计算效率。按最小度原则的列编号排序和VPAIR逐列变转轴消元策略可以有效减少注入元数目。在上述消元策略的基础上,提出在消元过程中动态调整量测排序的改进策略。所提策略在选择合适旋转对进行Givens变换的同时,进行量测排序的动态优化,可以进一步减少注入元数目。将改进策略与VPAIR策略在不同规模仿真系统的仿真结果进行比较,表明所提改进策略具有更高的计算效率,能够更好地满足在线状态估计的要求。
[Abstract]:Givens orthogonal transformation method is an effective method to improve the numerical stability of the power system state estimation, but appear in the transformation process of a large number of non zero injection element affects its computational efficiency. According to the principle of the minimum number of columns of the column sorting and VPAIR variable elimination shaft strategy can effectively reduce the number of elements. Based on the above injection elimination strategy on the improvement strategy is put forward in the elimination process of dynamic adjustment measurement. The proposed strategy in order to select the appropriate rotation of the Givens transform and dynamic optimization of the measurement sequence, can further reduce the number of elements. The improved injection comparison strategy and VPAIR strategy in the simulation of different scale simulation results. Show that the improved method has higher computational efficiency, better able to meet the requirements of on-line state estimation.

【作者单位】：南京国电南自电网自动化有限公司;浙江大学电气工程学院;
【分类号】：TM73

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