Real Time Optimal Decentralized Voltage Regulation Scheme of Active Distribution Networks on Per Phase Basis /

Abstract

Considering the boom in renewable energy integration rate in distribution networks and resulting power quality issues, this study proposes a novel real-time coordinated decentralized voltage regulation strategy utilizing distributed generators, which does not involve wide span communication infrastructure or power curtailment. The research utilizes stochastically modelled distributed generators along with load variation during time simulations to mimic the realistic operational scenarios. An adaptive and dynamic network segregation scheme is proposed for highly penetrated grids that ensures smooth plug and play operation of PV and wind dis­tributed energy units minus any long span communication and control infrastructure, eliminating any voltage perturbations following IEEE Std 1547TM_ Two-level control including optimal operational point selection of zone controllers at the first stage followed by OLTC tap optimiza­tion using three different schemes and their comparative analysis is done as second-level reliability support for voltage control in second stage. The network partition into smaller control zones following constrained optimization functions of both stages are tested on IEEE-123 node test feeder under different scenarios to verify the validity and effectiveness of the proposed scheme. All the results show that the proposed scheme achieves all of its objectives efficiently.