en Optimal Setting Sor Under Frequency Load Shedding Relays Using Mixed Integer Linear Programming قدرت Power پژوهشي Research <div dir="ltr"><span style="font-weight:normal;"><span style="font-size:10.0pt;">After occurrence of some disturbances in power system that causes the sever imbalance between generation power and electrical load, the power system frequency begins to decrease. To prevent power system frequency instability and stop the frequency decay below the power system allowable frequency</span></span> <span style="font-weight:normal;"><span style="font-size:10.0pt;">limitation, load shedding schemes should be utilized by applying under frequency load shedding relays. In this paper, power system behavior is modeled as a mathematical mixed integer programing (MIP), moreover the parameters that are required for UFLS relays setting are determined optimally in order to minimize the load shedding amount throughout power system in compliance with certain restrictions. The obtained results have been verified by Simulation studies. </span></span></div> After occurrence of some disturbances in power system that causes the sever imbalance between generation power and electrical load, the power system frequency begins to decrease. To prevent power system frequency instability and stop the frequency decay below the power system allowable frequency limitation, load shedding schemes should be utilized by applying under frequency load shedding relays. In this paper, power system behavior is modeled as a mathematical mixed integer programing (MIP), moreover the parameters that are required for UFLS relays setting are determined optimally in order to minimize the load shedding amount throughout power system in compliance with certain restrictions. The obtained results have been verified by Simulation studies. Under frequency load shedding, Optimization, Mixed integer program, Disturbance, Frequency stability. Under frequency load shedding, Optimization, Mixed integer program, Disturbance, Frequency stability. 115 121 http://jiaeee.com/browse.php?a_code=A-10-183-22&slc_lang=en&sid=1 Mohammad Alizadeh محمد علیزاده golmahalleh63@gmail.com 10031947532846003704 10031947532846003704 No Department of electrical engineering, Imam Khomeini naval Sciences University, iran, noshahr. Department of electrical engineering, Imam Khomeini naval Sciences University, iran, noshahr. Turaj Amraee تورج امرایی amraee@kntu.ac.ir 10031947532846003705 10031947532846003705 Yes Department of electrical and computer engineering, K.N. Toosi University of Technology, iran, tehran. Department of electrical and computer engineering, K.N. Toosi University of Technology, iran, tehran. Meysam Jaefari میثم جعفری m.jafari@nit.ac.ir 10031947532846003706 10031947532846003706 No Department of electrical engineering, Noshirvani University of Technology, iran, babol Department of electrical engineering, Noshirvani University of Technology, iran, babol