Research on fault characteristics about switching component failures for distribution electronic power transformers

2017 International Conference on New Energy and Future Energy System

Sang, Z.X.^1 ; Huang, J.Q.^2 ; Yan, J.^1 ; Du, Z.^1 ; Xu, Q.S.^2 ; Lei, H.^2 ; Zhou, S.X.^1 ; Wang, S.C.^2

State Grid HBEPC Economic and Technology Research Institute, Wuhan

430077, China^1

State Grid Laboratory for Hydro-thermal Power Resources Optimal Allocation and Simulation Technology, Wuhan

430077, China^2

关键词: Current distortion;    Distribution electronic power transformers;    Fault characteristics;    Fault diagnosis method;    Operational principles;    Power devices;    Power electronic devices;    Switching components;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/93/1/012069/pdf
DOI  :  10.1088/1755-1315/93/1/012069

来源: IOP

【 摘 要 】

The protection is an essential part for power device, especially for those in power grid, as the failure may cost great losses to the society. A study on the voltage and current abnormality in the power electronic devices in Distribution Electronic Power Transformer (D-EPT) during the failures on switching components is presented, as well as the operational principles for 10 kV rectifier, 10 kV/400 V DC-DC converter and 400 V inverter in D-EPT. Derived from the discussion on the effects of voltage and current distortion, the fault characteristics as well as a fault diagnosis method for D-EPT are introduced.