{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T12:30:08Z","timestamp":1771849808634,"version":"3.50.1"},"reference-count":49,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2022,4,26]],"date-time":"2022-04-26T00:00:00Z","timestamp":1650931200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>The doubly fed induction generator (DFIG) and back-to-back converter are very sensitive to power quality disturbances in grid-connected wind energy conversion systems (WECSs). Special attention has been given to protect the system from voltage sags, considering the introduction of several low-voltage ride-through (LVRT) techniques in the literature. However, only few works have really analyzed the behavior of power semiconductors during such phenomena in terms of the thermal stresses, whereas the existing studies are focused on balanced voltage sags only. In this context, this work presents a thermal profile analysis of power semiconductors in the grid-side converter (GSC) and rotor-side converter (RSC) considering a DFIG-based WECS submitted to symmetrical and asymmetrical voltage sags. The system is modeled using PLECS software and results on a 2.0 MW system are presented and thoroughly discussed. The results show that it is possible to meet the ride-through requirements during both balanced and unbalanced sags in terms of acceptable thermal stresses on the semiconductors as long as the back-to-back converter and its respective control system are properly designed.<\/jats:p>","DOI":"10.3390\/en15093152","type":"journal-article","created":{"date-parts":[[2022,4,26]],"date-time":"2022-04-26T11:45:55Z","timestamp":1650973555000},"page":"3152","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Thermal Analysis of Power Converters for DFIG-Based Wind Energy Conversion Systems during Voltage Sags"],"prefix":"10.3390","volume":"15","author":[{"given":"Igor","family":"de Oliveira","sequence":"first","affiliation":[{"name":"Graduate Program in Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7313-9060","authenticated-orcid":false,"given":"Fernando","family":"Tofoli","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Federal University of S\u00e3o Jo\u00e3o del-Rei, S\u00e3o Jo\u00e3o del-Rei 36307-352, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8453-344X","authenticated-orcid":false,"given":"Victor","family":"Mendes","sequence":"additional","affiliation":[{"name":"Graduate Program in Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,26]]},"reference":[{"key":"ref_1","unstructured":"Global Wind Energy Council (2021). Global Wind Report 2021, Global Wind Energy Council."},{"key":"ref_2","first-page":"042035","article-title":"A novel control strategy for enhancing the LVRT and voltage support capabilities of DFIG","volume":"Volume 121","author":"Shen","year":"2018","journal-title":"IOP Conference Series: Earth and Environmental Science"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2487","DOI":"10.1016\/j.rser.2017.06.054","article-title":"Analyzing effectiveness of LVRT techniques for DFIG wind turbine system and implementation of hybrid combination with control schemes","volume":"81","author":"Saeed","year":"2018","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"652","DOI":"10.1109\/TEC.2006.875783","article-title":"Control of a doubly fed induction generator in a wind turbine during grid fault ride-through","volume":"21","author":"Xiang","year":"2006","journal-title":"IEEE Trans. Energy Convers."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"713","DOI":"10.1109\/TPWRS.2011.2174387","article-title":"Advanced control strategy of DFIG wind turbines for power system fault ride through","volume":"27","author":"Yang","year":"2011","journal-title":"IEEE Trans. Power Syst."},{"key":"ref_6","unstructured":"ONS (2009). Procedimentos de Rede\u2014Subm\u00f3dulo 3.6: Requisitos T\u00e9cnicos M\u00ednimos Para a Conex\u00e3o \u00e0 Rede B\u00e1sica."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1016\/j.epsr.2017.09.002","article-title":"Parallel R-L configuration crowbar with series R-L circuit protection for LVRT strategy of DFIG under transient-state","volume":"154","author":"Justo","year":"2018","journal-title":"Electr. Power Syst. Res."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2021","DOI":"10.1109\/TIA.2018.2877400","article-title":"A modified DC chopper for limiting the fault current and controlling the DC-link voltage to enhance fault ride-through capability of doubly-fed induction-generator-based wind turbine","volume":"55","author":"Naderi","year":"2018","journal-title":"IEEE Trans. Ind. Appl."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Gray, C., Buque, C., and Chowdhury, S. (2016, January 17\u201321). AC series dynamic resistor protection scheme with switching control for doubly fed induction generator based WECS. Proceedings of the 2016 IEEE Power and Energy Society General Meeting (PESGM), Boston, MA, USA.","DOI":"10.1109\/PESGM.2016.7741299"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"4124","DOI":"10.1109\/TIA.2019.2904932","article-title":"Dynamic capabilities of an energy storage-embedded DFIG system","volume":"55","author":"Kim","year":"2019","journal-title":"IEEE Trans. Ind. Appl."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"22533","DOI":"10.1109\/ACCESS.2022.3154042","article-title":"Optimized series dynamic braking resistor for LVRT of doubly-fed induction generator with uncertain fault scenarios","volume":"10","author":"Huang","year":"2022","journal-title":"IEEE Access"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"836","DOI":"10.1109\/TEC.2010.2048033","article-title":"Feed-forward transient current control for low-voltage ride-through enhancement of DFIG wind turbines","volume":"25","author":"Liang","year":"2010","journal-title":"IEEE Trans. Energy Convers."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"8514","DOI":"10.1109\/TPEL.2016.2645791","article-title":"Inductance-emulating control for DFIG-based wind turbine to ride-through grid faults","volume":"32","author":"Zhu","year":"2016","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"670","DOI":"10.1109\/TEC.2017.2779864","article-title":"Feedforward current references control for DFIG-based wind turbine to improve transient control performance during grid faults","volume":"33","author":"Zhu","year":"2017","journal-title":"IEEE Trans. Energy Convers."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1452","DOI":"10.1109\/TIA.2013.2253439","article-title":"Feedforward transient compensation control for DFIG wind turbines during both balanced and unbalanced grid disturbances","volume":"49","author":"Liang","year":"2013","journal-title":"IEEE Trans. Ind. Appl."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1109\/TPEL.2019.2911346","article-title":"Dynamic stability analysis and improved LVRT schemes of DFIG-based wind turbines during a symmetrical fault in a weak grid","volume":"35","author":"Liu","year":"2019","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_17","first-page":"1172","article-title":"Real-time neural inverse optimal control for a wind generator","volume":"10","author":"Sanchez","year":"2018","journal-title":"IEEE Trans. Sustain. Energy"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Ozsoy, E., Padmanaban, S., Mihet-Popa, L., Fed\u00e1k, V., Ahmad, F., Akhtar, R., and Sabanovic, A. (2017). Control strategy for a grid-connected inverter under unbalanced network conditions\u2014A disturbance observer-based decoupled current approach. Energies, 10.","DOI":"10.20944\/preprints201706.0088.v1"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"107416","DOI":"10.1016\/j.ijepes.2021.107416","article-title":"Nonlinear MPC for DFIG-based wind power generation under unbalanced grid conditions","volume":"134","author":"Kong","year":"2022","journal-title":"Int. J. Electr. Power Energy Syst."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"105608","DOI":"10.1016\/j.ijepes.2019.105608","article-title":"High-order sliding mode control of DFIG under unbalanced grid voltage conditions","volume":"117","author":"Xiong","year":"2020","journal-title":"Int. J. Electr. Power Energy Syst."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Rafiee, Z., Heydari, R., Rafiee, M., Aghamohammadi, M.R., and Blaabjerg, F. (2022). Enhancement of the LVRT capability for DFIG-based wind farms based on short-circuit capacity. IEEE Syst. J., 1\u201312.","DOI":"10.1109\/JSYST.2022.3153887"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"3600","DOI":"10.1016\/j.egyr.2022.02.235","article-title":"Modified Super Twisting algorithm based sliding mode control for LVRT enhancement of DFIG driven wind system","volume":"8","author":"Hiremath","year":"2022","journal-title":"Energy Reports"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1161","DOI":"10.1109\/TEC.2011.2163718","article-title":"Modeling and ride-through control of doubly fed induction generators during symmetrical voltage sags","volume":"26","author":"Mendes","year":"2011","journal-title":"IEEE Trans. Energy Convers."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"6695","DOI":"10.1109\/TPEL.2014.2382603","article-title":"Improved demagnetization control of a doubly-fed induction generator under balanced grid fault","volume":"30","author":"Zhou","year":"2014","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1184","DOI":"10.1109\/TPEL.2004.833453","article-title":"Power electronics as efficient interface in dispersed power generation systems","volume":"19","author":"Blaabjerg","year":"2004","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Blaabjerg, F., Ma, K., and Zhou, D. (2012, January 28\u201331). Power electronics and reliability in renewable energy systems. Proceedings of the 2012 IEEE International Symposium on Industrial Electronics, Hangzhou, China.","DOI":"10.1109\/ISIE.2012.6237053"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Zhou, D., and Blaabjerg, F. (2013, January 10\u201313). Thermal analysis of two-level wind power converter under symmetrical grid fault. Proceedings of the IECON 2013-39th Annual Conference of the IEEE Industrial Electronics Society, Vienna, Austria.","DOI":"10.1109\/IECON.2013.6699422"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Zhou, D., Blaabjerg, F., Lau, M., and Tonnes, M. (2014, January 16\u201320). Thermal behavior of doubly-fed induction generator wind turbine system during balanced grid fault. Proceedings of the 2014 IEEE Applied Power Electronics Conference and Exposition-APEC 2014, Fort Worth, TX, USA.","DOI":"10.1109\/APEC.2014.6803744"},{"key":"ref_29","unstructured":"Wintrich, A., Nicolai, U., Tursky, W., and Reimann, T. (2011). Application Manual\u2014Power Semiconductors, Semikron International GmbH."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"4376","DOI":"10.1109\/TIE.2012.2216238","article-title":"Reliability analysis framework for structural redundancy in power semiconductors","volume":"10","author":"Behjati","year":"2013","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"298","DOI":"10.1109\/JESTIE.2021.3122996","article-title":"Improving the thermal performance of rotor-side converter of doubly-fed induction generator wind turbine while operating around synchronous speed","volume":"3","author":"Musarrat","year":"2021","journal-title":"IEEE J. Emerg. Sel. Top. Ind. Electron."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"10326","DOI":"10.1109\/TPEL.2018.2803125","article-title":"Optimized demagnetizing control of DFIG power converter for reduced thermal stress during symmetrical grid fault","volume":"33","author":"Zhou","year":"2018","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_33","unstructured":"Kov\u00e1cs, P.K. (1984). Transient Phenomena in Electrical Machines, Elsevier."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1049\/ip-epa:19960288","article-title":"Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation","volume":"143","author":"Pena","year":"1996","journal-title":"IEE Proc.-Electr. Power Appl."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Rodriguez, P., Teodorescu, R., Candela, I., Timbus, A.V., Liserre, M., and Blaabjerg, F. (2006, January 18\u201322). New positive-sequence voltage detector for grid synchronization of power converters under faulty grid conditions. Proceedings of the 2006 37th IEEE Power Electronics Specialists Conference, Jeju, Korea.","DOI":"10.1109\/pesc.2006.1712059"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"783","DOI":"10.1049\/iet-rpg.2014.0373","article-title":"Doubly-fed induction generator ride-through fault capability using resonant controllers for asymmetrical voltage sags","volume":"9","author":"Mendes","year":"2015","journal-title":"IET Renew. Power Gener."},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Teodorescu, R., Liserre, M., and Rodriguez, P. (2011). Grid Converters for Photovoltaic and Wind Power Systems, John Wiley & Sons.","DOI":"10.1002\/9780470667057"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"273","DOI":"10.1016\/j.epsr.2008.06.017","article-title":"Modeling and enhanced control of DFIG under unbalanced grid voltage conditions","volume":"79","author":"Hu","year":"2009","journal-title":"Electr. Power Syst. Res."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"439","DOI":"10.1109\/TIE.2008.2006952","article-title":"Improved control of DFIG systems during network unbalance using PI\u2013R current regulators","volume":"56","author":"Hu","year":"2008","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"829","DOI":"10.1016\/j.renene.2010.07.004","article-title":"DFIG wind generation systems operating with limited converter rating considered under unbalanced network conditions\u2013analysis and control design","volume":"36","author":"Hu","year":"2011","journal-title":"Renew. Energy"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"836","DOI":"10.1109\/TPEL.2006.875566","article-title":"Multiple harmonics control for three-phase grid converter systems with the use of PI-RES current controller in a rotating frame","volume":"21","author":"Liserre","year":"2006","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"709","DOI":"10.1109\/TEC.2006.878241","article-title":"Dynamic behavior of the doubly fed induction generator during three-phase voltage dips","volume":"22","author":"Lopez","year":"2007","journal-title":"IEEE Trans. Energy Convers."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"L\u00f3pez, J., Sanchis, P., Gub\u00eda, E., Urs\u00faa, A., Marroyo, L., and Roboam, X. (July, January 30). Control of doubly fed induction generator under symmetrical voltage dips. Proceedings of the 2008 IEEE International Symposium on Industrial Electronics, Cambridge, UK.","DOI":"10.1109\/ISIE.2008.4677148"},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Bollen, M.H. (2000). Understanding Power Quality Problems, IEEE Press.","DOI":"10.1109\/9780470546840"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1041","DOI":"10.1109\/TPEL.2008.921157","article-title":"Coordinated control of DFIG\u2019s rotor and grid side converters during network unbalance","volume":"23","author":"Xu","year":"2008","journal-title":"IEEE Trans. Power Electron."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"321","DOI":"10.1109\/TEC.2007.914317","article-title":"Wind turbines based on doubly fed induction generator under asymmetrical voltage dips","volume":"23","author":"Lopez","year":"2008","journal-title":"IEEE Trans. Energy Convers."},{"key":"ref_47","unstructured":"(2022, April 20). Infineon Datasheet of Module FF1500R12IE5. Available online: https:\/\/www.infineon.com\/dgdl\/Infineon-FF1500R12IE5-DataSheet-v03_01-EN.pdf?fileId=5546d4625f2e26bc015f2e9197d90007."},{"key":"ref_48","unstructured":"(2022, April 20). SEMIKRON Datasheet of Heatsink P16\/300. Available online: https:\/\/pdf1.alldatasheetpt.com\/datasheet-pdf\/view\/127115\/SEMIKRON\/P16\/300.html."},{"key":"ref_49","unstructured":"(2022, April 20). Infineon Datasheet of Module FF1500R17IP5P. Available online: https:\/\/www.infineon.com\/dgdl\/Infineon-FF1500R17IP5P-DataSheet-v03_02-EN.pdf?fileId=5546d46264a8de7e0164f4b761db4512."}],"container-title":["Energies"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1073\/15\/9\/3152\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:01:09Z","timestamp":1760137269000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1073\/15\/9\/3152"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,4,26]]},"references-count":49,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2022,5]]}},"alternative-id":["en15093152"],"URL":"https:\/\/doi.org\/10.3390\/en15093152","relation":{},"ISSN":["1996-1073"],"issn-type":[{"value":"1996-1073","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,4,26]]}}}