杠杆量测内涵分析及其改进广义潜能指标辨识方法

杠杆量测的准确辨识多年来一直是状态估计精度提升的瓶颈.文中针对杠杆量测这一重要的量测类型进行了深入分析和研究.首先,分析了2个关于杠杆量测定义的内涵一致性;进而,分别从代数和几何角度对杠杆量测的特性进行了分析,并以命题形式证明了无限靠近雅可比矩阵列空间的量测只能是杠杆量测;在此基础上,提出了基于潮流解及改进广义潜能指标的杠杆量测辨识新方法.相对于其他方法而言,该方法能够明显提升多个杠杆量测的正确辨识率.算例结果验证了所提方法的可行性和正确性.

Connotation Analysis of Leverage Measurement and Its Identification Method Based on Improved Generalized Potential Indicator

The accurate identification of leverage measurement (LM) has been the bottleneck of precision improvement of state estimation for many years. This paper deeply analyzes and explores the relevant issues about the important measurement type of LM. Firstly, the connotation consistency of the two definitions on LM is analyzed. Secondly, the characteristics of LM are explored from both algebraic and geometric aspects. The proposition that a measurement infinitely closing to the column space of Jacobi matrix indeed is LM is strictly proven. On this basis, this paper proposes a new identification method of LM using the power flow solution and the improved generalized potential indicator. Compared with other methods, the proposed method can significantly improve the correct identification rate of multiple LMs. The example results verify the feasibility and validity of the proposed method.