Elimination of Transformer Inrush Current by Three-Phase Linkage Circuit Breakers
The random switching of power transformers may generate high inrush currents. These currents have undesirable effects, including potential damage or loss-of-life to the transformer, protective relay misoperation, and reduced power quality on the system. Controlled transformer switching can eliminate these transients if residual core and bias flux are taken into account in the closing methods. This paper explores the practical considerations of residual and bias flux transients, performance of control strategies, and the application of three-phase linkage circuit breakers to control transformer inrush transients, and a simulation has been taken to test its feasibility.
KeywordsTransformer Inrush current Bias flux Simulation
- 1.de Castro Cezar, V.O., Rouve, L.-L., Coulomb, J.-L., Zgainski, F.-X., Chadebec, O., Caillault, B.: Elimination of inrush current using a new prefluxing method. In: ICEM 2014, pp. 1717–1723 (2014)Google Scholar
- 2.Gohil, K., Patel, J., Parekh, C.: Reduction of inrush current for transformer using sequential switching method. In: ICEEOT 2016, pp. 3942–3948 (2016)Google Scholar
- 3.Barnett, R.P., Nelson, J.H.: Transformer inrush mitigation using controlled switching of a 500-kV circuit breaker. In: 2010 International Conference on High Voltage Engineering and Application, New Orleans, LA, pp. 81–84 (2010)Google Scholar
- 6.Wei, C., Weixu, W., Jing, X., Wuyang, G., Yingchun, F.: Transformer inrush current restraining scheme based on switching voltage amplitude controlling method. Autom. Electr. Power Syst. 41(8), 159–165 (2017)Google Scholar
- 7.Song, Y., Jia, H., Xu, X., Yu, L.: Simulation analysis of inrush current of three phase transformer based on MATLAB. In: 2017 29th Chinese Control and Decision Conference (CCDC), pp. 3983–3985 (2017)Google Scholar