ﺑﻬﺒﻮد ﭘﺎﺳﺦ دﯾﻨﺎﻣﯿﮑﯽ ژﻧﺮاﺗﻮر اﻟﻘﺎﺋﯽ دوﺳﻮ ﺗﻐﺬﯾﻪ در ﺑﺮاﺑﺮ وﻟﺘﺎژ ﭘﺎﯾﯿﻦ ﺷﺒﮑﻪ ﺑﻪ ﮐﻤﮏ ﺳﯿﺴﺘﻢ ﮐﻨﺘﺮﻟﯽ ﻣﺒﺘﻨﯽ ﺑﺮ ﺣﺎﻟﺖ ﻟﻐﺰش اﻧﺘﮕﺮاﻟﯽ ﺑﺎ ﻣﺮﺟﻊ ﺗﻮان راﮐﺘﯿﻮ ﻣﺘﻐﯿﯿﺮ

Dynamic Response and Low-Voltage Ride-Through Improvement for A DFIG, Using an Integral Sliding Mode Controller with an Adjustable Reactive Power Reference Value

در اﯾﻦ ﻣﻘﺎﻟﻪ ﺑﻪﻣﻨﻈﻮر ﺑﻬﺒﻮد ﭘﺎﺳﺦ دﯾﻨﺎﻣﯿﮑﯽ ژﻧﺮاﺗﻮر اﻟﻘﺎﯾﯽ دوﺳﻮﺗﻐﺬﯾﻪ )DFIG(، ﯾﮏ ﺳﯿﺴﺘﻢ ﮐﻨﺘﺮﻟﯽ ﺟﺪﯾﺪ ﻣﺒﺘﻨﯽ ﺑﺮ ﮐﻨﺘﺮلﮐﻨﻨﺪه ﺳﻄﺢ ﻟﻐﺰش ﭘﯿﺸﻨﻬﺎد ﺷﺪه اﺳﺖ. ﺑﻪاﯾﻦ ﻣﻨﻈﻮر ﮐﻨﺘﺮل ﻣﺴﺘﻘﻞ ﺗﻮانﻫﺎي اﮐﺘﯿﻮ و راﮐﺘﯿﻮ ﺧﺮوﺟﯽ ژﻧﺮاﺗﻮر از ﻃﺮﯾﻖ ﯾﮏ ﮐﻨﺘﺮلﮐﻨﻨﺪه ﻣﺪ ﻟﻐﺰﺷﯽ )SMC( ﮐﻪ در ﺑﺮاﺑﺮ اﻏﺘﺸﺎﺷﺎت ﺧﺎرﺟﯽ و ﻧﺎﻣﻌﯿﻨﯽﻫﺎي ﺳﯿﺴﺘﻢ ﻣﻘﺎوم اﺳﺖ، ﮐﻨﺘﺮل ﻣﯽﮔﺮدد. ﺑﺮاي ﺑﻬﺒﻮد ﻋﻤﻠﮑﺮد ﮐﻨﺘﺮل در ﺣﺎﻟﺖ ﻣﺎﻧﺪﮔﺎر، ﻣﺪل اﻧﺘﮕﺮاﻟﯽ ﮐﻨﺘﺮلﮐﻨﻨﺪه ﻣﺪ ﻟﻐﺰﺷﯽ )ISMC( و ﺑﺮاي ﺑﻬﺒﻮد ﻗﺎﺑﻠﯿﺖ ﻋﺒﻮر از وﻟﺘﺎژ ﭘﺎﺋﯿﻦ )LVRT( ژﻧﺮاﺗﻮر در ﺷﺮاﯾﻂ وﻗﻮع ﺧﻄﺎ، ﮐﻨﺘﺮلﮐﻨﻨﺪه ﺗﻮان راﮐﺘﯿﻮ ﺑﺎ ﻣﺮﺟﻊ ﻣﺘﻐﯿﺮ ﻣﺒﺘﻨﯽ ﺑﺮ ﮐﻨﺘﺮلﮐﻨﻨﺪه ﻣﺘﻨﺎﺳﺐ-اﻧﺘﮕﺮالﮔﯿﺮ )PI( ﭘﯿﺸﻨﻬﺎد ﺷﺪه اﺳﺖ. ﻋﻤﻠﮑﺮد ﮐﻨﺘﺮلﮐﻨﻨﺪه ﭘﯿﺸﻨﻬﺎدي در ﻣﺪت زﻣﺎن ردﯾﺎﺑﯽ ﺗﻮان ﻣﺮﺟﻊ، ﺑﺎ دو ﺳﯿﺴﺘﻢ ﮐﻨﺘﺮﻟﯽ دﯾﮕﺮ ﮐﻪ ﻣﺮﺟﻊ ﺛﺎﺑﺘﯽ ﺑﺮاي ﺗﻮان راﮐﺘﯿﻮ داﺷﺘﻪ و ﻣﺒﺘﻨﯽ ﺑﺮ ﮐﻨﺘﺮلﮐﻨﻨﺪهﻫﺎي SMC و PI ﻫﺴﺘﻨﺪ در 9 ﺣﺎﻟﺖ ﻣﺨﺘﻠﻒ ﺧﻄﺎ ﻣﻘﺎﯾﺴﻪ ﺷﺪه اﺳﺖ. ﺧﻄﺎﻫﺎي ﺗﮏ ﻓﺎز ﺑﻪ زﻣﯿﻦ، دو ﻓﺎز ﺑﻪ زﻣﯿﻦ و ﺳﻪ ﻓﺎز ﺑﻪ زﻣﯿﻦ در ﺣﺎﻟﺖﻫﺎي زﯾﺮ ﺳﻨﮑﺮون، ﺳﻨﮑﺮون و ﻓﻮق ﺳﻨﮑﺮون ﺣﺎﻟﺖ-ﻫﺎي ﻣﺨﺘﻠﻒ ﻣﻮرد ﻧﻈﺮ در ﻣﻘﺎﯾﺴﻪ ﺳﯿﺴﺘﻢﻫﺎي ﮐﻨﺘﺮﻟﯽ ﻫﺴﺘﻨﺪ. ﻧﺘﺎﯾﺞ ﺷﺒﯿﻪﺳﺎزي ﺑﺎ اﺳﺘﻔﺎده از ﻧﺮماﻓﺰار ﺳﯿﻤﻮﻟﯿﻨﮏ ﻣﺘﻠﺐ، ﻧﺸﺎن-دﻫﻨﺪه رﻓﺘﺎر ﺣﺎﻟﺖ ﮔﺬراي ﻣﻨﺎﺳﺐﺗﺮ و ﺑﻪ وﯾﮋه ﻓﺮاﺟﻬﺶﻫﺎي ﮐﻤﺘﺮ ﺟﺮﯾﺎن، وﻟﺘﺎژ ﻟﯿﻨﮏ DC و ﺗﻮان اﮐﺘﯿﻮ ﺧﺮوﺟﯽ در ﺳﯿﺴﺘﻢ ﮐﻨﺘﺮل ﭘﯿﺸﻨﻬﺎدي در ﻣﻘﺎﯾﺴﻪ ﺑﺎ دو ﺳﯿﺴﺘﻢ دﯾﮕﺮ در ﺷﺮاﯾﻂ وﻗﻮع اﻧﻮاع ﺧﻄﺎ ﺑﻮده اﺳﺖ.

In this paper, a sliding mode controller with an adjustable reactive power reference value is proposed. To improve the performance of the controller in a steady-state, an Integral Sliding Mode Control is designed and used. In addition, to improve the low-voltage ride-through capability in the fault condition, a reactive power controller with an adjustable reference value is proposed. The performance of this control system, during the power track, is compared with two other control systems that have a fixed reference for reactive power and are based on SMC and PI controllers in 9 different fault modes. These 9 different modes include one-phase, two-phase, and three-phase short circuit faults in the sub-synchronous, synchronous, and super-synchronous mode of operation for DFIG. The proposed method has been implemented in Simulink/MATLAB software. The simulation results confirm the capability and effectiveness of the proposed control system in comparison with two other aforementioned control systems.