| Title | A simulation calculation method for suppressing the magnetizing inrush current in the setting of the overcurrent protection of the connecting transformer in the hydropower station |
| Publication Type | Conference Paper |
| Year of Publication | 2020 |
| Authors | Yang, Jian, Liu, Shoubao, Fang, Yuan, Xiong, Zhonghao, Li, Xin |
| Conference Name | 2020 5th International Conference on Mechanical, Control and Computer Engineering (ICMCCE) |
| Date Published | dec |
| Keywords | Analytical models, compositionality, connected transformer, Hydroelectric power generation, magnetizing inrush current, overcurrent, protection setting, pubcrawl, remanence, Resiliency, short-circuit currents, simulation calculation, Software, Surge protection, Switches, Transformer cores |
| Abstract | In order to improve the reliability of power supply in adjacent hydropower stations, the auxiliary power systems of the two stations are connected through a contact transformer. The magnetizing inrush current generated by the connecting transformer of a hydropower station has the characteristics of high frequency, strong energy, and multi-coupling. The harm caused by the connecting transformer is huge. In order to prevent misoperation during the closing process of the connecting transformer, this article aims at the problem of setting the switching current of the connecting transformer of the two hydropower stations, and establishes the analysis model of the excitation inrush current with SimPowerSystem software, and carries out the quantitative simulation calculation of the excitation inrush current of the connecting transformer. A setting strategy for overcurrent protection of tie transformers to suppress the excitation inrush current is proposed. Under the conditions of changing switch closing time, generator load, auxiliary transformer load, tie transformer core remanence, the maximum amplitude of the excitation inrush current is comprehensively judged Value, and then achieve the suppression of the excitation inrush current, and accurately determine the protection setting of the switch. |
| DOI | 10.1109/ICMCCE51767.2020.00051 |
| Citation Key | yang_simulation_2020 |
A simulation calculation method for suppressing the magnetizing inrush current in the setting of the overcurrent protection of the connecting transformer in the hydropower station