en Electricity Markets and Regulation Electricity Markets and Regulation Research Paper Research Paper <div style="text-align: justify;"><span style="font-family:Times New Roman;"><span style="font-size:14px;"><span style="color:#000000;"><span style="line-height:107%"><span style="line-height:107%"><span new="" roman="" times="">State estimation is used in power systems to estimate grid variables based on meter measurements. Unfortunately, <span class="fontstyle11"><span style="font-weight:bold"><span style="font-style:normal"><span style="line-height:107%"><span new="" roman="" times="">power grids are vulnerable to cyber-attacks. </span></span></span></span></span>Reducing cyber-attacks against state estimation is necessary to ensure power system safe and reliable operation. False data injection (FDI) is a type of cyber-attack that tampers with measurements. This paper proposes network reconfiguration as a strategy to decrease FDI attacks on distribution system state estimation. It is well-known that network reconfiguration is a common approach in distribution systems to improve the system&rsquo;s operation. In this paper, a modified switch opening and exchange (MSOE) method is used to reconfigure the network. The proposed method is tested on the IEEE 33-bus system. It is shown that network reconfiguration decreases the power measurements manipulation under false data injection attacks. Also, the resilient configuration of the distribution system is achieved, and the best particular configuration for reducing FDI attacks on each bus is obtained.&nbsp; <span style="color:red"></span></span></span></span></span></span></span><br> &nbsp;</div> Cyber-attack,false data injection (FDI) attacks,distribution system reconfiguration,state estimation. 135 145 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-4336-1&slc_lang=en&sid=1 reza behnam reza.be74@aut.ac.ir 1800319475328460013390 1800319475328460013390 Yes Amirkabir University of Technology Gevork Gharehpetian grptian@aut.ac.ir 1800319475328460013391 1800319475328460013391 No Amirkabir University of Technology