Research of decentralized loop automation simulation in distribution network using MALAB/SIMULINK

Abstract

Nowadays, technologies are rapidly developing, automation is omnipresent in our life. In the power system, automation technology solutions have been applied gradually and widely to meet the requirements of reliability. Before, when a fault occurs on the distribution network, the fault locating, isolating and grid restoring are still being done manually, so a large number of customers that are not in the fault zone still suffer outage for a long time. Distribution Automation System was developed to solve this problem. Currently, with the development of information technology, the Decentralized Loop Automation (DLA) in the distribution network is carried out by communication between the protective devices in the grid. Communication between devices can be done using time-control rules, using GOOSE messages, wifi or according to protocol IEC 61850. In addition, the protective devices can be connected to the control center to create a Centralized Loop Automation (CLA) in the distribution network. The paper considers the DLA solution with the time-control rules for a simple grid. Time-control rules models and simulation results were performed on MATLAB/ SIMULINK software. The paper proposed a user interface for DLA solution with many different failure cases, especially considering the protection coordination in case of doubles failure. The results of the paper show that DLA can isolate faults automatically and restore the grid in a short time, and these results can be developed as an experimental simulation in the future.