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This paper proposes a new teaching-learning-based optimization algorithm (TLBO) for estimating state variables of radial distribution systems. In this method, the state variables are estimated by minimizing the sum of weighted squared errors considering either real or pseudo measurements. TLBO is a successful recently-proposed optimization technique that simulates the educational system in a classroom. In this paper, an effective mutation has been incorporated into original TLBO algorithm to evade trapping in local minima and develop search process. Nevertheless, developing the search process does not considerably lessen the speed of the algorithm. So the proposed method is an efficient algorithm for DSSE. Finally, the proposed method is studied on three radial distribution test systems. The numerical results have been depicted to demonstrate the efficiency and accuracy of the method for solving DSSE.<\/jats:p>","DOI":"10.3233\/ifs-141579","type":"journal-article","created":{"date-parts":[[2015,10,6]],"date-time":"2015-10-06T12:05:54Z","timestamp":1444133154000},"page":"791-801","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":10,"title":["A new teaching-learning-based optimization algorithm for distribution system state estimation"],"prefix":"10.1177","volume":"29","author":[{"given":"Taher","family":"Niknam","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran"}]},{"given":"Bahareh","family":"Bagheri","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shiraz University of Technology, Shiraz, Iran"}]},{"given":"Marzieh Mirzaei","family":"Bonehkhater","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shiraz University of Technology, Shiraz, Iran"}]},{"given":"Bahman Bahmani","family":"Firouzi","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran"}]}],"member":"179","published-online":{"date-parts":[[2015,10,5]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSG.2013.2261564"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSTE.2013.2288805"},{"key":"e_1_3_1_4_2","unstructured":"AburAExp\u00f3sitoA2004Power System State Estimation: Theory and ImplementationNew YorkMarcel Dekker"},{"key":"e_1_3_1_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/5.824004"},{"key":"e_1_3_1_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/61.248315"},{"key":"e_1_3_1_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/59.336098"},{"key":"e_1_3_1_8_2","doi-asserted-by":"publisher","DOI":"10.1109\/59.373946"},{"key":"e_1_3_1_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/59.373974"},{"key":"e_1_3_1_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/61.924823"},{"key":"e_1_3_1_11_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRS.2003.821426"},{"key":"e_1_3_1_12_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-gtd.2008.0485"},{"key":"e_1_3_1_13_2","doi-asserted-by":"publisher","DOI":"10.1109\/MSP.2012.2187037"},{"key":"e_1_3_1_14_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRS.2012.2187804"},{"key":"e_1_3_1_15_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRS.2004.840409"},{"key":"e_1_3_1_16_2","unstructured":"CoelloCACLamontGBVanDA2007Evolutionary Algorithms for Solving Multi-Objective ProblemsVeldhuisen Springer"},{"key":"e_1_3_1_17_2","unstructured":"DebK2008Multi-Objective Optimization Using Evolutionary AlgorithmsJohn Wiley and Sons"},{"key":"e_1_3_1_18_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRS.2002.807051"},{"key":"e_1_3_1_19_2","doi-asserted-by":"publisher","DOI":"10.3233\/IFS-2005-00254"},{"key":"e_1_3_1_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.renene.2009.03.005"},{"key":"e_1_3_1_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cad.2010.12.015"},{"key":"e_1_3_1_22_2","doi-asserted-by":"publisher","DOI":"10.1109\/JSYST.2012.2183276"},{"key":"e_1_3_1_23_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRD.2012.2209900"},{"key":"e_1_3_1_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijepes.2013.02.023"},{"key":"e_1_3_1_25_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.engappai.2012.07.004"},{"key":"e_1_3_1_26_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSMCB.2008.921005"},{"key":"e_1_3_1_27_2","doi-asserted-by":"publisher","DOI":"10.1109\/3468.983425"},{"key":"e_1_3_1_28_2","doi-asserted-by":"publisher","DOI":"10.1007\/s10898-007-9149-x"},{"key":"e_1_3_1_29_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.asoc.2011.08.040"},{"issue":"3","key":"e_1_3_1_30_2","first-page":"710","article-title":"An improved teaching-learning-based optimization algorithm for solving unconstrained optimization problems","volume":"20","author":"Venkata Rao R","year":"2013","unstructured":"Venkata RaoRPatelV2013An improved teaching-learning-based optimization algorithm for solving unconstrained optimization problemsScientia Iranica203710720","journal-title":"Scientia Iranica"},{"key":"e_1_3_1_31_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijepes.2008.10.016"},{"key":"e_1_3_1_32_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRD.2003.813641"}],"container-title":["Journal of Intelligent &amp; 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