Fault Characteristic on DC Pole-to-Pole Short-Circuit in Distribution Electronic Power Transformers

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Sang, Zi-Xia^1 ; Li, Ya^2 ; Zhang, Ji^1 ; Wang, Si-Cong^1 ; Yan, Jiong^1 ; Du, Zhi^1 ; Huang, Jia-Qi^1 ; Chen, Zhu^1

State Grid HBEPC Economic and Technology Research Institute, Wuhan

430077, China^1

State Grid Huanggang Electric Power Supply Company, Huanggang, 438000, China^2

关键词: DC links;    Distribution electronic power transformers;    Distribution power grids;    Fault characteristics;    Pole short circuits;    Protection schemes;    Resonant mode;    Short circuit voltages;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/6/062016/pdf
DOI  :  10.1088/1755-1315/237/6/062016

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The analysis on fault characteristic of Distribution Electronic Power Transformer (D-EPT) can help design its operation and protection scheme, hence improve the reliability of the D-EPT as well as the distribution power grid. The DC pole-to-pole short-circuit fault at DC-Link is analyzed with R-L-C resonant mode and free-wheeling mode, and the theoretical analysis on the short-circuit voltage and current is based on several influence factors and relevant system parameters, which indicates that the fault characteristics are related to the configuration, operation and system parameters of D-EPT.