Study of Impact on penetration of induction stoves in electrical distribution network of Jorpati, Kathmandu: A case study of Gothatar Feeder

Abstract

The use of Induction stoves by replacing traditional ways of cooking can be beneficial for improving the health of people and for reducing impact on environment. Due to this Induction stove is gaining massive popularity in new policies initiated by the government. When there is massive insertion of Induction stove, it can be burden to electrical power distribution network. For our study residential area of Gothatar is taken which is supplied by Gothatar feeder of Jorpati Distribution Center. Gothatar feeder is radial feeder having total length of 10.67 kilometer with Dog, Weasel and Rabbit conductors. Gothatar feeder consist of total 4946 consumers and consisting of 36 public transformers and 13 private transformers. This study analyzes the effect of penetration of induction stove in 11 kV Gothatar feeder of Jorpati Distribution Center using DigSILENT powerfactory software. Electrical distribution networks are surveyed in terms of peak power of feeder, active power loss, line loading, voltage deviation, and transformer loading before and after penetration of Induction stove. For the feasibility of study different zones of area are created for induction stove penetration. At base case peak load is seen at 7 p.m. in the month of Poush which is 5.73 MVA with active power loss of 113 kW. Induction stove is penetrated at various operating range at different zones at step of 5 percent. When the penetration level of Induction stove reached 25 percent power demand reached 7.67 MVA and active power loss reached 179 kW. As induction stove penetration level increases the transformers got overloaded. At 25 percent penetration of Induction stove 18 number of the transformer got overloaded at different sections along with conductors. Analysis of results are performed. The results showsthat to increase the withstand capacity of distribution network for induction stove penetration mitigation have to be applied. Mitigation is done by changing transformer, cable, protection system to next higher available standard size for the reliable operation of electrical distribution network.