Assessment and Analysis of Typical Eskom Secondary Distribution Network under Normal Steady State

Abstract

To enable secondary distribution network to perform optimally, it is critical to assess the performance of the system. Optimum performance means acceptable voltage profile, increase reliability of supply, no overloading of cables and distribution transformers, absence of imbalances in both voltage and current phases and acceptable loss. This work evaluates the performance of secondary distribution network as a result of voltage losses, voltage deviation, voltage variation and voltage imbalance using MATLAB software. This paper presents a performance analysis of a typical Eskom secondary 11/0.4 kV, unbalanced secondary distribution system. The network was modeled with standard network parameters for secondary Eskom distribution network using MATLAB/Simulink Sim Power System tool box. The summary of the paper gives recommendations on effectual techniques for improving the voltage profile and reducing the voltage imbalance and voltage drop to an allowable standard.