配电网安全域的全维观测

提出了配电网安全域(DSSR)全维观测的概念与方法。首先,在总结现有2维、3维投影观测不足的基础上提出全维观测的概念。其次,提出一种基于安全距离的全维观测方法。该方法包括以下内容:(1)定义DSSR的等效半径,即原点到所有有效安全边界的距离;(2)通过DSSR半径的折线图和雷达图进行全维可视化,以观察域的特征和凹陷;(3)定义凹陷指标和形状畸变指标量化描述域的凹陷程度和圆润程度;(4)分析凹陷对应的边界表达式,得出凹陷原因及改善方案。最后,进行算例验证并与投影法对比。上述方法能完整地观测高维域的形态,发现投影法难以发现的隐藏缺陷,为安全域信息的深度挖掘提供了新的工具。

Full-dimensional Observation of Distribution System Security Region

The concept and method of full-dimensional(F-D)observation of distribution system security region(DSSR)are proposed. Firstly, on the basis of summarizing the shortcomings of the existing 2D and 3D projective observation method, the concept of F-D observation is put forward. Secondly, the F-D observation method based on the security distance is proposed, which includes the following contents: (1)The equivalent radiuses of DSSR are defined as the distance from original point(zero loading point)to all of the effective security boundaries; (2)The DSSR radiuses are visualized by line and radar map to observe the characteristics and concavity of DSSR; (3)The concavity indices and the shape distortion index are defined to quantify the degree of concavity and distortion of DSSR; (4)The reasons of concavity and the solutions to solve the concavity problem are acquired by analyzing the concavity security boundaries expressions. Finally, the proposed F-D observation method is illustrated and compared with 2D/3D projective approach through the case studies. The result shows that the F-D method can achieve complete observation of high dimensional regions and detect the hidden defects which 2D/3D method is difficult to find. The new F-D method provides a powerful tool to explore the deeper information in DSSR.