Distribution network reconfiguration based on vector shift operation

• Published in: IET generation, transmission & distribution Vol. 12; no. 13; pp. 3339 - 3345
• Main Authors: Ji, Xingquan, Liu, Qi, Yu, Yongjin, Fan, Shuxian, Wu, Na
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 31.07.2018
• Subjects: branch exchanging; bus voltages; distributed generations; distributed power generation; distribution network reconfiguration; distribution networks; distribution system; efficient reconfiguration algorithm; element shift operation; load flow; load flow calculation; nodal equivalent power model; nodal voltages; open‐branch set; power loss variation; power moment; power vectors; Research Article; resistance vectors; vector shift operation; VSO‐based reconfiguration algorithm; efficient reconfiguration algorithm; distribution networks; distribution network reconfiguration; distributed generations; distribution system; resistance vectors; power loss variation; distributed power generation; load flow calculation; nodal voltages; vector shift operation; VSO-based reconfiguration algorithm; open-branch set; nodal equivalent power model; power vectors; element shift operation; power moment; bus voltages; branch exchanging; load flow
• ISSN: 1751-8687; 1751-8695; 1751-8695
• DOI: 10.1049/iet-gtd.2018.0099

To make an appropriate compromise between the solving speed and solution quality for a distribution network with distributed generations (DGs), an efficient reconfiguration algorithm based on vector shift operation (VSO) considering DGs is proposed. The nodal equivalent power model considering the influence of DGs is established. Power moment is selected as an index to decide whether load flow calculation or VSO should be conducted. In the former case, all bus voltages are updated and then be regarded as the initial condition for VSO. In the latter case, the power and resistance vectors are first formulated based on the structure and parameters of the distribution system, and the variation of power loss after branch exchange is then calculated based on these vectors instead of the time-consuming load flow calculation. The power and resistance vectors are updated by simple element shift operation after each step of branch exchanging. The final optimal solution is obtained when the open-branch set remains unchanged after branch exchanging. The proposed VSO-based reconfiguration algorithm is applied to a practical distribution system in Taiwan. The influences of the DGs and network reconfiguration on power loss and nodal voltages are illustrated. Test results show that the proposed reconfiguration algorithm is feasible and efficient.