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Shrestha, Ashish
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Performance Enhancement of Radial Distribution System via Network Reconfiguration: A Case Study of Urban City in Nepal Pandey, Govinda Prashad; Shrestha, Ashish; Mali, Bijen; Singh, Ajay; Jha, Ajay Kumar
Journal of Renewable Energy, Electrical, and Computer Engineering Vol 1, No 1 (2021): March 2021
Publisher : Institute for Research and Community Service, Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v1i1.3455

Abstract

Increasing unplanned energy demand increase has led to network congestion, increases power losses and poor voltage profile. To decrease these effects of an unmanaged power system, distribution network reconfiguration provides an effective solution. This paper deals with improving the power losses and poor voltage profile of the Phulchowk Distribution and Consumer Services (DCS) via the implementation of an optimum reconfiguration approach. A Genetic Algorithm (GA) is developed for the optimization. Further, it tries to answer to what extent can we improve the distribution system without overhauling the entire network. The developed simulation algorithm is firstly put into work on the IEEE 33 bus system to better its voltage profile and the poor power losses. The effectiveness of the developed system is validated as it reduced the voltage drop by 5.66% and the power loss by 25.96%. With the solution validated, the algorithm is further implemented in the case of Pulchowk DCS. After reconfiguring the system in different individual cases, optimum network reconfiguration is selected that improved the voltage profile by 3.85%, and the active and reactive power losses by 44.29% and 45.54% respectively from the base case scenario.
Analysis of Technical Loss Calculation Using Load Curve Approach on 20 kV Distribution Network Maulana, Rizky Rahmat; Salahuddin, S; Ezwarsyah, E; Ismail, Baharuddin; Shrestha, Ashish; Astonkar, Dhiraj Vijayrao
Journal of Renewable Energy, Electrical, and Computer Engineering Vol 1, No 2 (2021): September 2021
Publisher : Institute for Research and Community Service, Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v1i2.5238

Abstract

Energy loss (losses) is the loss of a certain amount of energy generated when it is distributed to consumers so that it affects the profitability of the company concerned. The size of the losses from an electric power system shows the level of efficiency of the system, the lower the percentage of losses that occur the more efficient the system. Energy losses in the distribution network are generally divided into two, namely technical and non-technical losses. The calculation of technical losses in the 20 KV medium distribution network of PT PLN (Persero) Ulp Matang Glumpang Dua is carried out using the load curve approach method and using the help of the Microsoft Exel program, while the technical losses calculated are technical losses on the Medium Voltage Network and Distribution Transformer. From the results of the analysis of the calculation of technical losses in 2020, the total technical loss value at MG-01 Matang City is in the range of 13.8% to 20.8% which consists of the average technical loss in the Medium Voltage Network feeder of 0.02%. and the loss of Distribution Transformer by 17.6%.
Thermal and Physical Properties of Patchouli Essential Oil Industry Residue as Renewable Feedstock for Bioenergy Ginting, Zainuddin; Setiawan, Adi; Mulyawan, Rizka; Armadani, Wika; Hermawan, Yuda; Shrestha, Ashish
Journal of Renewable Energy, Electrical, and Computer Engineering Vol 2, No 1 (2022): March 2022
Publisher : Institute for Research and Community Service, Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v2i1.6644

Abstract

Patchouli plant is one of main agricultural commodities in Indonesia with an area of 64.67 ha. The solid waste produced from the distillation industry is around 98% of total feedstock. The aim of this research is to disclose the characteristics of solid waste biomass from patchouli essential oil industry harvested from Lhokseumawe, Indonesia. The properties of patchouli biomass before and after distillation was analyzed by using a number of techniques including proximate, bomb calorimeter, TGA-DTG, DSC and lignocellulosic analyses. Five kilograms of biomass was collected after patchouli harvesting then sorted into four categories i.e. leaves, branches and trunk. and mixture of all. Another set of biomass residue was collected after distillation process and grouped similar to those collected before distillation. All samples were then dried, ground and sieved to 50 mesh size. The analysis results showed that the highest heating value was observed from the sample of patchouli leaves collected before distillation process with a value of 15.65 MJ/kg where its volatile matter content was 81.26%. Compositional analysis of lignocellulosic suggested that 27% in pre-distilled branches. Mixture of all parts was found to contain 35% cellulose that was the highest. Lignin content with 42% value was found in after distilled trunk.
Voltage Profile Improvement of Distribution System via Integration of Distributed Generation Resources Pokhrel, Biswas Babu; Shrestha, Ashish; Phuyal, Sudip; Jha, Shailendra Kumar
Journal of Renewable Energy, Electrical, and Computer Engineering Vol 1, No 1 (2021): March 2021
Publisher : Institute for Research and Community Service, Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v1i1.3519

Abstract

This study attempts to identify the causes and possible solutions for voltage profile issues in the lower land of Nepal, and is specifically focused on Laukahi feeder, a radial distribution system with an approximate length of 65 km and distributed at 11KV system voltage. Currently, the end-users feeding through this feeder are getting extremely poor voltage along with frequent interruptions in the power supply. In this study, a forward/ backward sweep algorithm is used to analyze the load flow of the distribution system, whereas ant colony optimization (ACO) technique is used to identify the best location for the Distributed Generator (DG) penetrations. After completion of this study, it is found that, the branch loss of the feeder can be reduced up to 87.22%, and voltage profile can be improved from 0.828 pu to 0.982 pu by integrating some form of DGs.
Co-Authors Adi Setiawan Armadani, Wika Astonkar, Dhiraj Vijayrao Ezwarsyah, E Hermawan, Yuda Ismail, Baharuddin Jha, Ajay Kumar Mali, Bijen Maulana, Rizky Rahmat Mulyawan, Rizka Pandey, Govinda Prashad Phuyal, Sudip Pokhrel, Biswas Babu Salahuddin, S Shailendra Kumar Jha, Shailendra Kumar Singh, Ajay Zainuddin Ginting