Power maximised and anti-saturation power conditioning circuit for current transformer harvester on overhead lines


The current transformer (CT) harvester is an effective and efficient solution due to its higher reliability and power density compared to other techniques. However, the current of overhead conductor fluctuates from tens of to thousands of amperes, which brings two challenges for the CT harvester design. First, the startup current, above which the harvester can independently power the monitoring devices, should be as low as possible, so that the battery capacity can be reduced; secondly, the magnetic core should be ensured unsaturated in high current condition. This paper proposes a power conditioning circuit with comprehensive control to maximize the output power and prevent the core from saturation. A prototype that can deliver 22.5 W power with 200 A is designed, and a control strategy based on the finite-state machine is implemented. Experimental results show that the startup current for 2 W load is about 30 A, and the core power density at 60 A is 45.96 mW/cm3, both of which are markedly improved compared to the reported results of the same condition.

Publication DOI: https://doi.org/10.1049/iet-pel.2018.5389
Additional Information: This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library
Publication ISSN: 1755-4543
Last Modified: 10 Jun 2024 07:29
Date Deposited: 19 Oct 2018 07:44
Full Text Link:
Related URLs: http://digital- ... t-pel.2018.5389 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-10-05
Published Online Date: 2018-09-04
Accepted Date: 2018-08-28
Authors: Qian, Zhongnan
Wu, Jiande
He, Xiangning
Lin, Zhengyu (ORCID Profile 0000-0001-7733-2431)



Version: Accepted Version

| Preview

Export / Share Citation


Additional statistics for this record