Version 1
: Received: 11 November 2021 / Approved: 15 November 2021 / Online: 15 November 2021 (15:08:07 CET)
Version 2
: Received: 13 December 2021 / Approved: 14 December 2021 / Online: 14 December 2021 (15:26:32 CET)
How to cite:
Chen, C.; Lin, C.E. Improve the Three-phase Unbalance Rate of Railway System Under 2% By Three Kinds of Special Transformer Wiring. Preprints2021, 2021110270. https://doi.org/10.20944/preprints202111.0270.v2
Chen, C.; Lin, C.E. Improve the Three-phase Unbalance Rate of Railway System Under 2% By Three Kinds of Special Transformer Wiring. Preprints 2021, 2021110270. https://doi.org/10.20944/preprints202111.0270.v2
Chen, C.; Lin, C.E. Improve the Three-phase Unbalance Rate of Railway System Under 2% By Three Kinds of Special Transformer Wiring. Preprints2021, 2021110270. https://doi.org/10.20944/preprints202111.0270.v2
APA Style
Chen, C., & Lin, C.E. (2021). Improve the Three-phase Unbalance Rate of Railway System Under 2% By Three Kinds of Special Transformer Wiring. Preprints. https://doi.org/10.20944/preprints202111.0270.v2
Chicago/Turabian Style
Chen, C. and Chin E. Lin. 2021 "Improve the Three-phase Unbalance Rate of Railway System Under 2% By Three Kinds of Special Transformer Wiring" Preprints. https://doi.org/10.20944/preprints202111.0270.v2
Abstract
Because imbalanced power will cause the loss of the propulsion motor of the railway vehicle, and the increase in temperature will shorten the service life of the electric vehicle. Not only this, but also increase the cost of electricity and maintenance. In the past, the industry only focused on methods to improve power quality such as load capacity, relay setting, and harmonic resolution. Now, the consider of three-phase unbalance rate (TPUR) must be applied. I propose special transformers wiring (STW) to improve the three unbalance rates and provide different transformer wiring methods. According to the IEEE Committee, in the future, power companies will need to install balanced relay stations to improve three-phase unbalance rate. the internal regulations of Taipower must be less than 4.5% (voltage unbalance rate (NPSUR)of 2.5% and motor temperature rise of 12.5%). the derivation of the transformer "three-phase unbalance rate" model is the focus of the railway system. This research is based on the model derivation of different wiring methods to improve the hot problem caused by the three-phase imbalance and improve the service life of the train. And pointed out that Scott, Le-Blanc, Modified-Woodbridge three wiring methods can be applied to future railway system routes to improve the three-phase unbalance rate, in line with the IEEE standard of less than 2%.
Keywords
three-phase unbalance rate (TPUR); negative phase sequence unbalance rate (NPSUR); special transformer wiring (STW); Railway System Transport Cable (RSTC); Traction Supply Substation (TSS)
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
