Analysis of power supply from high-voltage side for electronic Current Transformer

Conference: PCIM Asia 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/27/2017 - 06/29/2017 at Shanghai, China

Proceedings: PCIM Asia 2017

Pages: 6Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Tian, Yi (Xi’an Polytechnic University & Xidian University, China)
Huang, Xinbo (Xi'an Polytechnic University, China)
Tian, Wenchao (Xidian University, China)
Wang, Xiang (Xi’an Polytechnic University, China)

The wireless sensor has been widely applied in the field of power monitoring system; one of the difficulties in the design of the whole system design is the power supply. Because of the particularity of installation location of the wireless sensor, a self-supply power of the high-voltage side is designed in this paper. To limit the voltage and current output of the Current Transformer (CT) in the large current state, a simpler and more reliable direct limit mode-flat-wave reactance limit mode is adopted. It uses saturation characteristics of CT, and the current from 1A~50000 A on busbars is converted to voltage energy 1~60 V. By comparing the experimental results with the iron-core of permalloy and amorphous, the circuit model of the CT is analyzed, eventually, the calculation formula of the iron-core specification is given. The experimental results demonstrate that the scheme is feasible.