Impact of Increasing Load on the Distribution Network with the addition of Electric Cooking Stoves at each Household: Case Study of Nepal
Authors: Prashant Kumar Shah, Nava Raj Karki, Akhileshwar Mishra, Mahammad Badrudoza
Abstract— According to Nepal’s budget for fiscal year 2079/80, the government has planned to distribute electric cooking stoves (ECS) to each household. With the use of ECS on a large scale, the load on the distribution feeder will increase significantly, resulting in a reduced voltage level at buses, increased loading on the distribution transformer, and, in fact, increased current carried by the feeder conductor. The study focuses mainly on the loading of the distribution transformer (DT), the voltage level at the buses, and the ampacity of the feeder conductor. The study is carried out considering two feeders: the Jorpati feeder in Kathmandu district and the Malangwa feeder in Sarlahi district of Nepal. The load and ZIP Coefficients of the study area are estimated by polynomial load modeling technique on a seasonal basis. The results show after connecting ECS, the major impact is seen on the Jorpati feeder during the winter season. There is overloading on 18 DTs, the existing dog conductor will not be able to handle the increasing demand for load current and voltage level at buses drops slightly. Thus, system upgradation is required to meet the growing load due to the addition of ECS at each household. Similarly, in the Malangwa feeder, the results show that after connecting ECS, the major impact is seen in the summer season. There is overloading on almost all DTs, low voltage levels at buses, and the existing feeder conductor will not be able to handle the increasing current requirement. Since the complete system needs to be restructured, in the present context, promoting the use of ECS at each household in the Malangwa area is not recommended.
Keywords— Electric cooking stoves, ZIP Coefficients, Ampacity of feeder conductor, distribution transformer sizing
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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:
P. K. Shah, N. R. Karki, A. Mishra, M. Badrudoza, “Impact of Increasing Load on the Distribution Network with the addition of Electric Cooking Stoves at each Household: Case Study of Nepal”, International Conference on Role of Energy for Sustainable Social Development, 14th-15th May 2023, Kathmandu, Nepal