• Active power losses in Estonian power transmission networkAinsaar, Karin Maria; Ülavere, Eero; Tammoja, Heiki; Valtin, Juhan14th International Symposium "Topical problems in the field of electrical and power engineering. Doctoral school of energy and geotechnology. II" : Pärnu, Estonia, January 13-18, 20142014 / p. 112-117 : ill
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• Analysis of black start strategies for microgrids with renewable distributed generationArmstorfer, Andreas; Biechl, Helmuth; Rosin, ArgoIECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society : proceedings2019 / p. 2121–2125 : ill https://doi.org/10.1109/IECON.2019.8926631 https://www.scopus.com/sourceid/56670 https://www.scopus.com/record/display.uri?eid=2-s2.0-85084108300&origin=inward&txGid=9faf155edf283e4af00deb506cfcc9f5 https://www.webofscience.com/wos/woscc/full-record/WOS:000522050602021
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• Avalike elektrivõrkude pinge tunnussuurused = Voltage characteristics of electricity supplied by public electricity networks2011 https://www.ester.ee/record=b2743062*est
• Avariielektrijaam valmis, virtuaaljõujaam arutamiselKöster, Ain; Strandberg, MarekInseneeria2014 / lk. 40-43 : ill https://artiklid.elnet.ee/record=b2678063*est
• Combined assessment of electrical supply interruption costsRaesaar, Peeter; Tiigimägi, Eeli; Valtin, JuhanWSEAS transactions on power systems2006 / 5, p. 953-960 : ill
• Defektide ja rikete seoste analüüs : lepingu Lep16039 aruanne [Võrguväljaanne]Palu, Ivo; Keel, Matti; Tammoja, Heiki2016 https://www.elektrilevi.ee/-/doc/6305157/ettevottest/defektide_rikete_aruanne.pdf
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• Dynamic positioning system for the multifunctional vessel EVA-316Subarev, Kirill; Vinnikov, Dmitri; Laugis, Juhan8th International Workshop on Research and Education in Mechatronics 2007 : 14-15 June 2007, Tallinn, Estonia2007 / p. 142-145 : ill
• Economical feasibility of off-grid hybrid power supply for Estonian remote areas. Part 1 : hybrid components sizingBolgov, Viktor; Laanetu, MargusPQ2016 : the 10th International Conference 2016 Electric Power Quality and Supply Reliability Conference (PQ) : August 29-31, 2016, Tallinn, Estonia : proceedings2016 / p. 179-186 : ill https://doi.org/10.1109/PQ.2016.7724110
• Economical feasibility of off-grid hybrid power supply for Estonian remote areas. Part 2 : determination of breakeven grid extension distancesBolgov, Viktor; Janson, KunoPQ2016 : the 10th International Conference 2016 Electric Power Quality and Supply Reliability Conference (PQ) : August 29-31, 2016, Tallinn, Estonia : proceedings2016 / p. 187-192 : ill https://doi.org/10.1109/PQ.2016.7724111
• Ehitiste elektripaigaldisedKroon, Kalju; Risthein, Endel2006 https://www.ester.ee/record=b2155977*est
• Einari Kisel: ilustamata elektrivarustuskindlusest [Võrguväljaanne]Kisel, Einaripostimees.ee2020 https://leht.postimees.ee/7113086/einari-kisel-ilustamata-elektrivarustuskindlusest
• Electric Power Quality and Supply Reliability : June 9-12, 1999, Sagadi, Estonia : conference proceedingsJärvik, Jaan; Vinnal, Toomas1999 https://www.ester.ee/record=b1817525*est
• Electricity supply of industrial plantsRisthein, Endel1993 http://www.ester.ee/record=b1064391*est
• Elektri varustuskindlusestKonist, AlarPostimees2021 / Lk. 15 https://dea.digar.ee/article/postimees/2021/02/22/14.6
• Elektri varustuskindlusestKonist, Alar; Aro, ReinElektriala2021 / lk. 6-9 : portr https://www.ester.ee/record=b1240496*est
• Elektrienergia säästlik kasutamine hoonetes : õppematerjalTeemets, Raivo; Vinnal, Toomas2013 http://www.ester.ee/record=b3033912*est
• Elektrikvaliteedi juubelikonverents TallinnasJärvik, JaanElektriala2016 / lk. 12-14 : fot https://artiklid.elnet.ee/record=b2803320*est
• Elektrivarustus : metoodiline juhend kursuseprojekti koostamiseks 10.02 eriala üliõpilastele1989 https://www.ester.ee/record=b1216609*est
• Elektrivarustuse tulevikuvisioonidLehtla, Tõnu; Vinnal, Toomas2015 http://www.ester.ee/record=b4511325*est
• Elektrivarustuse tulevikuvisioonid : [kõrgkooliõpik]Lehtla, Tõnu; Vinnal, Toomas2016 http://www.ester.ee/record=b4571559*est
• Elektrivõrgu klientide elektripaigaldiste ühe ja kahepoolse toite mõju analüüs varustuskindlusele : lepingu nr LEP15094 aruanne [Võrguväljaanne]Valtin, Juhan; Tammoja, Heiki; Raesaar, Peeter2016 https://www.elektrilevi.ee/-/doc/6305157/ettevottest/uuringud/Elektrivorgu_klientide_elektripaigaldiste_yhe_ja_kahepoolse_toite_moju_analyys_varustuskindlusele.pdf
• Energeetika - otsapidi üksnes taastuvenergia küljesJanson, Kuno; Kallaste, Ants; Bolgov, ViktorHorisont2013 / lk. 30-36 : ill https://artiklid.elnet.ee/record=b2606466*est
• Euroopa perutav roheratsuRosin, Argo; Drovtar, ImrePostimees2021 / Lk. 6−7
• 5th International Conference : Electric Power Quality and Supply Reliability : August 23-26, 2006, Viimsi, Estonia : conference proceedings2006 http://www.ester.ee/record=b2184858*est
• Floating high step-down stacked dc-dc converter based on buck-boost cells [Electronic resource]Tibola, Gabriel; Duarte, Jorge; Blinov, AndreiEPE'15 ECCE Europe : 8-10 September 2015, Geneva, Switzerland : 17th European Conference on Power Electronics and Applications2015 / p. 1-10 : ill. [USB] http://dx.doi.org/10.1109/EPE.2015.7309181
• Fuzzy logic control application in DC-link voltage control of the energy routerNajafzadeh, Mahdiyyeh20th International Symposium "Topical problems in the field of electrical and power engineering. Doctoral school of energy and geotechnology. III" : Tallinn, Estonia, September 8-10, 20212022 / p. 59-60 : ill https://www.ester.ee/record=b5457278*est
• Harmonic load of residential distribution network - case study monitoring resultsKütt, Lauri; Saarijärvi, Eero; Lehtonen, Matti; Mõlder, Heigo; Vinnal, ToomasPQ2014 : the 9th International 2014 Electric Power Quality and Supply Reliability Conference (PQ) : June 11-13, 2014, Rakvere, Estonia : proceedings2014 / p. 93-98 : ill
• Hoonete jõu- ja andmevõrkudestLehtla, TõnuElektriku kalender 19991998 / lk. 164-169: ill
• Ilma ei jõua soojaks kütta : energia säästliku kasutamise õpik [3.-5. klassile]Kask, Ülo; Kask, Livia; Sihtmäe, Mariliis; Kuldpere, Kaire2005 https://www.ester.ee/record=b2118454*est
• Impact of distributed generation on estimation of exponential load modelsLeinakse, Madis; Tani, Pärtel; Kilter, Jako2019 IEEE Power & Energy Society General Meeting (PESGM)2019 / 5 p. : ill https://doi.org/10.1109/PESGM40551.2019.8974014
• Instantaneous, short-term and predictive long-term power balancing techniques in intelligent distribution gridsSuzdalenko, Alexander; Galkin, IlyaTechnological Innovation for the Internet of Things : 4th IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2013, Costa de Caparica, Portugal, April 15-17, 2013, Proceedings2013 / p. 343-350 https://doi.org/10.1007/978-3-642-37291-9_37 https://www.scopus.com/sourceid/19400157163 https://www.scopus.com/record/display.uri?eid=2-s2.0-84928226683&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1007%2F978-3-642-37291-9_37%29&sessionSearchId=b54b8b263198aa2b467a2e833e85bb3b
• Kisel: elektritarbimisprobleemi aitaksid lahendada soojasalvestid [Võrguväljaanne]Povilaitis, Dmitripealinn.ee2021 https://www.pealinn.ee/newset/kisel-elektritarbimisprobleemi-aitaksid-lahendada-soojasalvestid-n265822
• Maaelektriku teatmik1975 https://www.ester.ee/record=b1304264*est
• Mare Roosileht: president kohtus noorte kliimaaktivistidega, kas Ida-Virumaa on rohepöördeks valmis? [Võrguväljaanne]Roosileht, Mareepl.delfi.ee2021 https://epl.delfi.ee/artikkel/95472847/mare-roosileht-president-kohtus-noorte-kliimaaktivistidega-kas-ida-virumaa-on-rohepoordeks-valmis
• Modeling of lighting load in residential buildingsIqbal, Muhammad Naveed; Kütt, Lauri; Shabbir, NomanProceeding of the 4th International Conference on Recent Trends in Computer Science and Electronics 20192019 / p. 111 http://www.rtcse.org/RTCSE_2019.pdf
• Modeling of lighting load in residential buildingsIqbal, Muhammad Naveed; Kütt, Lauri; Shabbir, NomanInternational journal of engineering and advanced technology2018 / p. 233–236 https://www.scopus.com/record/display.uri?eid=2-s2.0-85064435587&origin=resultslist
• Multifunctional energy router for residential applications = Multifunktsionaalne energiaruuter eramuteleNajafzadeh, Mahdiyyeh2022 https://doi.org/10.23658/taltech.25/2022 https://digikogu.taltech.ee/et/Item/6914b8ca-7ca5-49d1-868a-a6de9192f8b4 https://www.ester.ee/record=b5501867*est
• Non-intrusive load monitoring based smart energy management system for smart buildingsJawad, Muhammad; Shabbir, Noman; Ahmadiahangar, Roya; Rosin, Argo; Khaleel, T.; Tahir, W.2024 7th International Conference on Information and Computer Technologies (ICICT) : proceedings2024 / p. 46-50 https://doi.org/10.1109/ICICT62343.2024.00014
• Optimal approximation of input-output characteristics of power units and plantsŠuvalova, Jelena2004 https://www.ester.ee/record=b1967729*est
• Outlook of usage of supercapacitors in uninterruptible power suppliesGalkin, Ilja; Stepanov, A.; Laugis, JuhanBEC 2006 : 2006 International Baltic Electronics Conference : Tallinn University of Technology, October 2-4, 2006, Tallinn, Estonia : proceedings of the 10th Biennial Baltic Electronics Conference2006 / p. 237-240 : ill
• An overview of reliability enhancing methods for energy router for residental applicationRahimpour, Saeed20th International Symposium "Topical problems in the field of electrical and power engineering. Doctoral school of energy and geotechnology. III" : Tallinn, Estonia, September 8-10, 20212021 / p. 51-52 : ill https://www.ester.ee/record=b5457278*est
• Pilk energeetika ja elektrivarustuse tulevikkuLehtla, TõnuElektriala2016 / lk. 12-15 : ill https://artiklid.elnet.ee/record=b2762698*est
• Power quality improvement in diode rectifiers using ripple-power re-rectification and multifunctional filter elementsSakkos, Tiiu; Sarv, Vello; Järvik, JaanEPQU'01 : Electrical Power Quality and Utilisation : 6th International Conference : September 19-21, 2001, Cracow, Poland : proceedings2001 / p. 333-338 : ill
• PQ2010 : 7th International Conference "2010 Electric Power Quality and Supply Reliability" : June 16-18, 2010, Kuressaare, Estonia : conference proceedings2010 http://www.ester.ee/record=b2631897*est
• PQ2012 : 8th International Conference : 2012 Electric Power Quality and Supply Reliability : June 11-13, 2012, Tartu, Estonia : conference proceedings2012 https://www.ester.ee/record=b4770080*est
• PQ2014 : the 9th International 2014 Electric Power Quality and Supply Reliability Conference (PQ) : June 11 - 13, 2014, Rakvere, Estonia : proceedings2014 https://www.ester.ee/record=b4479987*est
• PQ2016 : the 10th International Conference 2016 Electric Power Quality and Supply Reliability Conference (PQ) : August 29-31, 2016, Tallinn, Estonia : proceedings2016
• Professor : Eesti ei peaks Vene elektrisüsteemist kergekäeliselt lahkumaPõlendik, Kadri; Luts, Janekerr.ee2022 / fot https://www.err.ee/1608480857/professor-eesti-ei-peaks-vene-elektrisusteemist-kergekaeliselt-lahkuma
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• Rahvusvaheline elektritoite kvaliteedi ja elektrivarustuskindluse konverents - PQ2012Keskkonnatehnika2012 / lk. 9 https://artiklid.elnet.ee/record=b2526343*est
• Rahvusvaheline elektritoite kvaliteedi ja varustuskindluse konverents PQ2012 möödus edukaltVaimann, Toomas; Kütt, Lauri; Järvik, JaanElektriala2012 / lk. 10-11 : fot
• Rahvusvaheline konverents elektritoite kvaliteedist ja elektri varustuskindlusest - PQ2012 : [eelinfo]Elektriala2012 / lk. 32
• Rahvusvaheline konverents elektritoite kvaliteedist ja elektri varustuskindlusest - PQ2012 : [eelinfo]Inseneeria2012 / lk. 4
• Residential energy management system to support increased renewable penetration = Taastuvenergiaallikate kasutustihedust toetav energiahaldussüsteemShabbir, Noman2022 https://doi.org/10.23658/taltech.37/2022 https://digikogu.taltech.ee/et/Item/2c178a6b-f918-4932-bd1b-48fefb7fc7aa https://www.ester.ee/record=b5503996*est
• Riigikontrolli hävitav hinnang: Eestis võib mõne aasta pärast tekkida probleeme elektri varustuskindlusegaLepik, Piretarileht.delfi.ee2023 https://arileht.delfi.ee/artikkel/120245488/paari-aasta-parast-voib-eestis-tekkida-probleeme-elektri-varustuskindlusega-praegu-rutakalt-uhendusi-tehes-investeerime-topelt
• Riigikontrolli hävitav hinnang: Eestis võib mõne aasta pärast tekkida probleeme elektri varustuskindlusegaLepik, Piretarileht.delfi.ee2023 https://arileht.delfi.ee/artikkel/120245488/paari-aasta-parast-voib-eestis-tekkida-probleeme-elektri-varustuskindlusega-praegu-rutakalt-uhendusi-tehes-investeerime-topelt
• Stability issues with network impedances and its mitigation in islanded microgridsBeg, Nauman; Biechl, Helmuth; Rosin, ArgoNEIS 2019 : Conference on Sustainable Energy Supply and Energy Storage Systems Hamburg, 19-20 September, 20192019 / p. 189-194 https://10times.com/neis-germany https://www.vde-verlag.de/buecher/565152/neis-2019.html
• Standalone electrical storages as part of the network system in metropolitan area in FinlandRikkas, Elina Rebecka2018 15th International Conference on the European Energy Market (EEM 2018), Lodz, Poland, 27-29 June 20182018 / p. 363-367 : ill https://doi.org/10.1109/EEM.2018.8469985
• Stiihilise taastuvenergia kohandamine inimeste tehiskeskkonna vajadusteleJanson, Kuno; Kallaste, AntsTallinna Tehnikaülikooli aastaraamat 20122013 / lk. 29-39 : ill
• Suppression of voltage flicker by saturable reactor operating under forced magnetization [Electronic resource]Bolgov, Viktor; Järvik, JaanEUROCON 2007 : the International Conference on Computer as a Tool : September 9-12, 2007, Warsaw, Poland : proceedings2007 / p. 1417-1422 : ill. [CD-ROM] https://ieeexplore.ieee.org/document/4400513
• Tarbijal puudub elektrimajanduse osas selgusRajangu, VäinoPostimees2021 / Lk. 16 https://dea.digar.ee/article/postimees/2021/02/26/16.7 https://leht.postimees.ee/7188694/vaino-rajangu-tarbijal-puudub-elektrimajanduse-tuleviku-osas-selgus
• Teabepäev TTÜs "Uut elektrivarustuses ja -valgustuses"Elektriala2011 / 6, lk. 29
• The 4th International Conference : Electric Power Quality and Supply Reliability : August 29...31, 2004, Pedase, Estonia : proceedings2004 https://www.ester.ee/record=b1978182*est
• 6th International Conference "2008 Power Quality and Supply Reliability" : August 27-29, 2008 : Pärnu, Estonia : conference proceedings2008 https://www.ester.ee/record=b2549933*est
• Tööstusettevõtete elektriseadmed ja elektrivarustus : programm, metoodilised juhendid, laboratoorsete tööde kirjeldused ja kursusprojekteerimise juhend erialale 03081973 https://www.ester.ee/record=b1339847*est
• Uninterruptible power supply in distribution substations auxiliary circuitsHõimoja, Hardi4th International Symposium Topical Problems of Education in the Field of Electrical and Power Engineering. Doctoral School of Energy and Geotechnology : Kuressaare, Estonia, January 15-20, 20072007 / p. 78-82
• Use of hydrogen and AI as an opportunities to increase energy autarky and create business more sustainableKrzos, G.; Piwoni-Krzeszowska, E.; Kowalski, J.; Prause, Gunnar KlausProcedia computer science2023 / p. 3276-3285 https://doi.org/10.1016/j.procs.2023.10.321 https://www.scopus.com/sourceid/19700182801 https://www.scopus.com/record/display.uri?eid=2-s2.0-85183564169&origin=inward&txGid=4bb6aa18c21a7a58dcb5ef169eb85481
• Using common household thermal storages to support the PV- and battery system in nearly zero energy buildings in off-grid modeHäring, Tobias; Rosin, Argo; Biechl, HelmuthSustainable energy technologies and assessments2019 / p. 12-24 : ill https://doi.org/10.1016/j.seta.2019.05.014 https://www.scopus.com/sourceid/21100239262 https://www.scopus.com/record/display.uri?eid=2-s2.0-85066495583&origin=inward&txGid=f0a17a9ed5bfabbbccca8a0fb03ffc9f https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SUSTAIN%20ENERGY%20TECHN&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000484794800002
• Value stream mapping for evaluation of load scheduling possibilities in a district heating plantMelsas, Raivo; Rosin, Argo; Drovtar, ImreTransactions on environment and electrical engineering2016 / p. 62-67 : ill http://dx.doi.org/10.22149/teee.v1i3.34
• Value stream mapping for evaluation of load scheduling possibilities in a district heating plant [Electronic resource]Melsas, Raivo; Rosin, Argo; Drovtar, Imre2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC) : 7-10 June 2016, Florence, Italy : conference proceedings2016 / [6] p. : ill. [CD-ROM] https://doi.org/10.1109/EEEIC.2016.7555696
• Weight and size estimation of energy efficient LED BallastsGalkin, Ilja; Tetervenok, Oleg; Milaševski, IrenaElektronika ir elektrotechnika = Electronics and electrical engineering2012 / p. 55-60 : ill https://eejournal.ktu.lt/index.php/elt/article/view/1453
• Анализ схем компенсации реактивной мощности и улучшения качества напряжения в системе электроснабжения машиностроительного заводаJanson, KunoИсследование электрических машин и электромагнитных устройств специального назначения1983 / с. 65-74 : ил https://www.ester.ee/record=b1271915*est https://digikogu.taltech.ee/et/Item/d1676714-579b-4ec9-949f-401ab84c5a70
• Комплексный план модернизации энергоснабжения ткацкого производства предприятия Кренгольм холдингGolubõhh, Oleg; Risthein, EndelActual Problems of Electrical Drives and Industry Automation : the research symposium of young scientists : Tallinn, Estonia, May 31 - June 5, 19991999 / p. 73-76: ill
• Откуда мы станем в ближайшем будущем получать свою электроэнергию? [Online resource]Konist, AlarСеверное побережье (Пыхьяранник)2021 https://severnojepoberezhje.postimees.ee/7266753/alar-konist-otkuda-my-stanem-v-blizhayshem-budushchem-poluchat-svoyu-elektroenergiyu
• Программа "Электричество" для проектирования электроснабжения на АвтоКАД-еMöldre, HeinoEngineering graphics BALTGRAF - 5 : abstracts of the International Conference : Tallinn, Estonia, June 15-16, 20002000 / p. 75
• Специальные вопросы электроснабжения предприятий : учебное пособие для студентов электроэнергетических специальностейVagin, G.; Orlov, V.; Järvik, Jaan1993 https://www.ester.ee/record=b1064028*est
• Электроснабжение и электрооборудование металлорежущих станков : программа, методические указания и контрольные работы для студентов специальности 0501 "Технология машиностроения, металлорежущие станки и инструменты"1977 https://www.ester.ee/record=b1309170*est
• Электроснабжение промышленных предприятий : программа, методические указания и контрольные задания1968 https://www.ester.ee/record=b1339778*est
• Электроснабжение промышленных предприятий : программа, методические указания и контрольные задания для специальности 06281969 https://www.ester.ee/record=b1339874*est
• Электроснабжение промышленных предприятий : рабочая программа и методические указания для специальности 06281974 https://www.ester.ee/record=b1346451*est
• Электроснабжение промышленных предприятий : рабочая программа и методические указания для специальности 06281981 https://www.ester.ee/record=b1312080*est
• Электроснабжение промышленных предприятий : расчеты на 100-строчных программируемых микрокалькуляторах1988 https://www.ester.ee/record=b1255457*est
• Электроснабжение промышленных предприятий : учебник для студентов вузовФедоров А.Я.; Risthein, Endel1981 https://www.ester.ee/record=b1566583*est
• Электроснабжение промышленных установок : развитие и современное состояние : методическое пособие1989 https://www.ester.ee/record=b1192541*est
• Электроснабжение промышленных установок : [учебник для вузов по специальности "Электропривод и автоматизация промышленных установок и технологических комплексов"]Risthein, Endel1991 http://www.ester.ee/record=b1529560*est