Open AccessAnalysis of Influence of Inverter New Energy Transient Short-Circuit Current Harmonic Component on Transformer Differential Protection
Author(s) -
Yuyuan Huang,
Wei Zong,
Bo Zhang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/677/5/052110
Subject(s) - inrush current , inverter , transformer , isolation transformer , electrical engineering , delta wye transformer , engineering , current transformer , electronic engineering , voltage
The second harmonic braking protection is the key to the differential excitation inrush current of the transformer and the quick action of the differential protection. In this paper, it is verified that the large-scale inverter type power supply may affect the second harmonic braking protection of the transformer. The mechanism of generating the second harmonic component of the current during the short-circuit fault of the inverter-type power supply is analyzed. Further analysis of the secondary harmonic current generated by the inverter-type power supply during the fault in the transformer zone may cause the second harmonic braking component of the transformer. Finally, the correctness of the analysis is verified based on the PSCAD/EMTDC transient electromagnetic simulation software.