Grounding System Design in Electrical Substation: An Optimization Approach
Grounding System Design in Electrical Substation: An Optimization Approach
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Date
2006
Authors
Vladimiro Miranda
Hussein Khodr
Gustavo Salloum
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Abstract
The main purpose of this work is the development of
an optimization model for the design of the grounding grid in
electrical substations. The problem is formulated as a mixedinteger
linear programming problem, in terms of the constructive
characteristics and the peculiar requirements to construct and to
install the grounding grid.
The model incorporates the variables that define the grid
characteristics of all possible configurations including the grid
geometry and the depth and conductor size. The optimization
problem is subject to safety constraints related with the maximum
allowed touching and step voltages. It also includes the equivalent
impedance of the transmission line connected to the substation
where it will be located the grounding grid to be designed.
The methodology allows selecting the optimum grid of the
possible configurations, so that is a very useful tool for the
engineering design. The formulation and specifications used is
based in IEEE Std. 80-2000.