Optimum Design of a Grounding Grid for Substations

• Main Authors: Chun-Hong Wang, 王淳弘
• Other Authors: Ying-Tung Hsiao
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/79302266564788931062

碩士 === 國立臺北教育大學 === 資訊科學系碩士班 === 103 === The planning of grounding systems for a substation attempts not only to ensure personnel safety, but also to provide a stable reference voltage for protection system. The planning of grounding systems problem is a complex non-linear combinatorial problem, since the variables of the problem is non-differentiable and the constraints must be satisfied with the system requirements. This work presents a novel means of designing grounding grids while addressing safety and cost related issues by a general-purpose optimization technique. The paper considers practical aspects of grounding grids and safety constraints. The safety constraints comprise of the step voltage, touch voltage and ground potential rise. Also proposed herein is a solution methodology based on an optimization technique and the IEEE Std. 80-2000 to determine the configuration of grounding grids with minimum cost. Finally a practical case demonstrates the effectiveness of the proposed approach.