روش ﻣﺪوﻻﺳﯿﻮن ﭘﻬﻨﺎي ﭘﺎﻟﺲ ﺑﺮدار ﻓﻀﺎﯾﯽ ﺗﺤﻤﻞ ﺧﻄﺎ ﺑﺮاي ﺧﻄﺎﻫﺎي ﮐﻠﯿﺪ ﺑﺎز ﭼﻨﺪﮔﺎﻧﻪ در ﻣﺒﺪل ﺗﻮرﺑﯿﻦ ﺑﺎدي ﺷﺶﻓﺎز

Fault-Tolerant SVPWM Method for Multiple Open-Switch Faults in Six-Phase Wind Turbine Converter

ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ اﻓﺰاﯾﺶ اﺳﺘﻔﺎده از اﻧﺮژي ﺑﺎد و ﺗﺎﺛﯿﺮ ﻗﺎﺑﻞ ﺗﻮﺟﻪ آن ﺑﺮ ﺷﺒﮑﻪ ﻗﺪرت، ﺗﺤﻤﻞ ﺧﻄﺎ در ﺗﻮرﺑﯿﻦ ﺑﺎدي ﺑﺮاي اﻓﺰاﯾﺶ ﻗﺎﺑﻠﯿﺖ اﻃﻤﯿﻨﺎن و ﺳﻄﺢ در دﺳﺘﺮس ﺑﻮدن آن ﺿﺮوري اﺳﺖ. در اﯾﻦ ﻣﻘﺎﻟﻪ، ﯾﮏ روش ﺟﺪﯾﺪ ﺗﺤﻤﻞ ﺧﻄﺎي ﮐﻠﯿﺪ ﺑﺎز ﭼﻨﺪﮔﺎﻧﻪ ﺑﺮاي ﻣﺒﺪل AC-DC ﺷﺶﻓﺎز، ﺑﻪﻋﻨﻮان آﺳﯿﺐﭘﺬﯾﺮﺗﺮﯾﻦ ﻗﺴﻤﺖ ﺳﯿﺴﺘﻢ ﺗﻮرﺑﯿﻦ ﺑﺎدي اراﯾﻪ ﺷﺪه اﺳﺖ. روش ﭘﯿﺸﻨﻬﺎدي ﺗﺤﻤﻞ ﺧﻄﺎ از ﺣﺎﻟﺖ اﻓﺰوﻧﮕﯽ ﺑﺮدارﻫﺎي ﻓﻀﺎﯾﯽ ﻣﺒﺪل ﺷﺶﻓﺎز در ﻣﺪوﻻﺳﯿﻮن ﭘﻬﻨﺎي ﭘﺎﻟﺲ ﺑﺮدار ﻓﻀﺎﯾﯽ )SVPWM( اﺳﺘﻔﺎده ﻧﻤﻮده اﺳﺖ و ﺑﺎ ﺗﻐﯿﯿﺮ ﺳﯿﮕﻨﺎلﻫﺎي ﮐﻠﯿﺪزﻧﯽ در ﻧﺎﺣﯿﻪﻫﺎي ﺧﻄﺎدار، ﺑﺮدار ﻓﻀﺎﯾﯽ دﯾﮕﺮي را ﺟﺎﯾﮕﺰﯾﻦ ﺑﺮدار ﻓﻀﺎﯾﯽ ﻣﻄﻠﻮب ﻧﻤﻮده ﺗﺎ از اﯾﺠﺎد ﺑﺮدار ﻓﻀﺎﯾﯽ ﻧﺎﻣﻄﻠﻮب ﺑﺮاﺛﺮ ﺧﻄﺎ ﮐﻠﯿﺪ ﺑﺎز ﺟﻠﻮﮔﯿﺮي ﺷﻮد. ﻣﺰﯾﺖ اﺻﻠﯽ روش ﭘﯿﺸﻨﻬﺎدي اﯾﻦ اﺳﺖ ﮐﻪ ﺑﺪون اﻓﺰودن ﭘﺎﯾﻪ، ﮐﻠﯿﺪ ﯾﺎ ﺗﺮﯾﺎك )TRIAC(، ﺑﻪ ﻣﺪار ﻣﺒﺪل و ﻫﻤﭽﻨﯿﻦ ﺑﺪون ﻧﯿﺎز ﺑﻪ ﻣﺤﺎﺳﺒﺎت ﭘﯿﭽﯿﺪه، ﺧﻄﺎﻫﺎي ﮐﻠﯿﺪ ﺑﺎز ﻣﺒﺪل را ﺗﺤﻤﻞ ﻧﻤﻮده و ﻣﻘﺪار اﺿﺎﻓﻪ ﺟﺮﯾﺎن و ﻣﻘﺪار اﻋﻮﺟﺎج ﻫﺎرﻣﻮﻧﯿﮏ ﮐﻞ )THD( ﻧﺎﺷﯽ از اﯾﻦ ﺧﻄﺎﻫﺎ را در ﻓﺎزﻫﺎي ﺳﺎﻟﻢ و ﺧﻄﺎدار ﮐﺎﻫﺶ داده اﺳﺖ. در ﻧﻬﺎﯾﺖ روش ﭘﯿﺸﻨﻬﺎدي ﺗﺤﻤﻞ ﺧﻄﺎ ﺑﺎ ﺷﺒﯿﻪﺳﺎزي در ﻣﺤﯿﻂ ﺳﯿﻤﻮﻟﯿﻨﮏ ﻧﺮماﻓﺰار ﻣﺘﻠﺐ ارزﯾﺎﺑﯽ ﺷﺪه و ﻧﺘﺎﯾﺞ ﺣﺎﺻﻞ از اﯾﻦ ﺷﺒﯿﻪﺳﺎزي ﺟﻬﺖ ﺗﺎﯾﯿﺪ اﺛﺮ ﺑﺨﺸﯽ آن اراﺋﻪ ﺷﺪه اﺳﺖ.

Due to the rapid growth of wind energy and its significant effect on the power grid, fault-tolerant in wind turbines is considered crucial to increase their reliability and availability levels. This paper presents a fault-tolerant technique for multiple open-switch faults in a six-phase AC-DC converter as the most vulnerable components of the wind turbine system. The proposed fault-tolerant technique uses the redundancy mode of six-phase space vectors in space vector pulse width modulation (SVPWM) and changes the switching signals in fault sectors, replacing the desired space vector with another space vector to avoid creating an undesired space vector. The main advantage of this technique is that, without adding any legs, switches, or triode for alternating currents (TRIAC) to the converter circuit, and without the need for complex calculations, the open switch faults are tolerated and the value of overcurrent and total harmonic distortion (THD) caused by the open switch faults on the healthy and faulty phases are reduced. Finally, the proposed fault-tolerant technique is evaluated by MATLAB simulation and the results of this simulation show its effectiveness.