Modelling Selected Parameters of Power Grid Network in the South-Eastern Part of Poland: The Case Study

Abstract

In this paper, a case study is conducted based on the real data obtained from the local Distribution System Operator (DSO) of electrical energy. The analyzed network represents connections and high-voltage switchgears of 110 kV. Selected graph parameters—vertex degree distribution, the average vertex degree, the graph density, network efficiency, the clustering coefficient, the average path length, and the graph diameter were examined, taking into account that in the analysis, some nodes were removed due to the different failures. For each failure, the possible effects on network parameters were tested. As a final result, it was shown that in the analyzed case, the removal of only five nodes could cause a significant (almost four times) fall of graph efficiency. In turn, this means that the whole analyzed network cannot be considered as a fault-tolerant.

The interconnection exchange and complex systems properties in power grid network

“…After each removal the graph properties are shown in Table 2. The description of parameters given in Table 2 can be found in literature, see for example [12]. It can be seen that after the removal of 3 nodes the average network efficiency falls more than 25%.…”