Abstract—The purpose of this study is to predominately investigate the power systems in the Bang Yo substation (Feeder7 Phone Thong) of the Lao PDR in correspondence to the 22 kV distribution system development plan of Electricity du Laos (EDL) during the period 2015-2020. The investigation will specify the additional distribution line projects implemented to satisfy the N-1 contingency criterion, justify the economic viability of the system’s impact, while make present additional projects that will facilitate the improvement of the quality and reliability of such regional networks. In the investigation, the steady-state power flow analysis and distribution system reliability assessment for Bang Yo’s substation power systems were conducted during the period of peak demand. As a direct result from the system reliability assessment, the improvements of system loss saving, Energy Not Supplied (ENS), System Average Interruption Frequency Index (SAIFI), and System Average Interruption Duration Index (SAIDI) after reinforcing the systems with each of the additional projects were obtained. Additionally, in the economic evaluation of each additional project during the corresponding period, the calculations of the Economic Internal Rates of Return (EIRRs) on account of the system reliability improvement were performed in correspondence to the interest rates of the Bank’s loan of 10%

 

Index Terms—electricity distribution system reliability, SAIFI, SAIDI, ENS

Cite: Viengsavanh Thepboualy, Danu Wiroteurairuang, Komson Darojn, and Natthapong Nanthasamroeng, "An Improvement of Reliability for Electricity Distribution System in Phone Thong District, Lao PDR," International Journal of Electronics and Electrical Engineering, Vol. 6, No. 1, pp. 6-9, March 2018. doi: 10.18178/ijeee.6.1.6-9