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\begin{document}
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\title{A modified current differential protection for transmission line
connected to energy storage plant based on adaptive phase compensation}



\author[1]{Haoyu Zhu}%
\author[2]{Xiaoran Wang}%
\author[2]{Chunju Fan}%
\author[2]{Yan Hu}%
\author[2]{Nengling Tai}%
\affil[1]{Shanghai Jiaotong University}%
\affil[2]{Shanghai Jiao Tong University}%


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  \date{April 25, 2026}


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\begin{abstract}
In current engineering practice, the phase of the short-circuit current
provided by a grid-connected energy storage plant is affected by the
pre-fault status of charging and discharging. When energy storage
encounters a fault in the transmission line during charging, the phase
difference is likely to be large between the short-circuit current it
provides and the short-circuit current provided by the grid on the other
side of the line, leading to a risk of no-trip failure in traditional
current differential protection (CDP). To address the above problems,
this paper proposes a modified current differential protection criterion
based on adaptive phase compensation (MCDP). By judging the state of
energy storage charging and discharging state as well as the presence of
negative sequence currents, current phases on both sides of the line
will be compensated at different angles, so as to reduce the phase
difference and improve the sensitivity of the protection without
reducing the reliability. The performance test of the MCDP is carried
out through PSCAD simulation. The results show that the MCDP has good
performance under different fault conditions and ability to resist fault
resistance.%
\end{abstract}%



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\textbf{Hosted file}

\verb`A modified current differential protection for transmission line of energy storage plant based on adaptive phase compensation.docx`  available at \url{https://authorea.com/users/942080/articles/1344804-a-modified-current-differential-protection-for-transmission-line-connected-to-energy-storage-plant-based-on-adaptive-phase-compensation}

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