A Simple and Generalized Model to Compute LT Distribution Loss
Authors: Deepak Adhikari, Nava Raj Karki, Mahammad Badrudoza
Abstract—For all electricity utilities, losses are the major problem. Most of the losses occur in the electricity distribution system. For the economic operation of the power system, these losses should be minimized by implementing proper loss reduction techniques. The electric utility can segregate losses, identify their priority, and may launch effective loss reduction techniques. The total loss of an LT feeder can be determined by knowing the total energy supplied by a transformer and the energy consumed by all consumers connected to that transformer. But the determination of the technical loss of a distribution feeder by simulation is tedious and time-consuming. Non-technical loss is the difference between total loss and technical loss. So, without knowing the technical loss non-technical loss cannot be determined. Therefore, some mathematical model shall be formulated which can help to determine the technical loss of the distribution line in a faster way. This research intends to find a simple and generalized model to compute LT Distribution Loss. This research is based on the real field data of certain parts of the Balaju Distribution Center, Nepal Electricity Authority (NEA). Five different distribution feeders of the urban area and five different distribution feeders of rural areas are taken for the analysis. Losses for those distribution feeders are found after load flow analysis on ETAP. Similarly, losses for the same distribution feeders are found using uniformly distributed load (UDL) and uniformly varying load (UVL) concepts and compared with ETAP simulation results. The study shows that, for the urban area, losses obtained from ETAP simulation and UDL concept are nearly equal with a maximum error of 3.86% while that of ETAP and UVL concept is not equal as there is a maximum variation of 51.32%. Similarly, for the rural areas, losses obtained from ETAP simulation and UDL concept are not equal with a maximum error of 26.83% and that of ETAP and UVL concept is also not equal as there is a maximum variation of 23.01%. Thus, the study shows that the losses of rural area LT feeders cannot be computed using either UDL or UVL concept but the losses of urban area LT feeders can be computed using the UDL concept with a maximum error of 3.86 %.
Keywords—Technical loss, Non-technical loss, uniformly distributed load, uniformly varying load
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Published In: International Conference on Role of Energy for Sustainable Social Development (RESSD-2023)
Date of Conference: 14th-15th May 2023
Conference Location: Kathmandu, Nepal
Publisher: IEEE Power and Energy Society Nepal Chapter
Cite the paper as:
D. Adhikari, N. R. Karki, M. Badrudoza, “A Simple and Generalized Model to Compute LT Distribution Loss”, International Conference on Role of Energy for Sustainable Social Development, 14th-15th May 2023, Kathmandu, Nepal