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\begin{document}

\title{Distance protection of transmission lines emanating from photovoltaic
power plants based on superconducting magnetic energy storage}



\author[1]{Zhihui Dai}%
\author[1]{Meiyuan Liu}%
\author[1]{Wenzhuo Wang}%
\author[2]{Weiping Zhu}%
\affil[1]{North China Electric Power University - Baoding Campus}%
\affil[2]{State Grid Jiangsu Electric Power Co Ltd}%


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  \date{June 17, 2024}


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\begin{abstract}
Due to influences of a control strategy reliant on photovoltaic(PV)
inverters, weak feedback of PV power plants and controlled
characteristics of current phases make the measured impedance of PV-side
distance protection of outgoing transmission lines unable to reflect the
location of faults. In this paper, the solution equations of the line
short-circuit impedance are accurately derived according to the fault
component sequence network diagram of the transmission line. Based on
the superconducting magnetic energy storage (SMES) connected to the DC
bus of the photovoltaic station, the traditional
low-voltage-ride-through(LVRT) control strategy is changed. The unknowns
in the equations are eliminated by the control and protection
coordination, and then the short-circuit impedance is solved. Compared
with the existing methods, there is no approximate calculation in this
method, and the accuracy of the calculation is greatly improved. In
addition, while reasonably solving the unreliable action of distance
protection, it also takes into account the reactive power support of the
photovoltaic station for the power grid during the fault period. Instead
of being weakened, the LVRT capability is even enhanced.%
\end{abstract}%



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\textbf{Hosted file}

\verb`Distance protection of transmission lines emanating from photovoltaic power plants based on superconducting magnetic energy storage.doc`  available at \url{https://authorea.com/users/692296/articles/682509-distance-protection-of-transmission-lines-emanating-from-photovoltaic-power-plants-based-on-superconducting-magnetic-energy-storage}

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