ﻣﮑﺎﻧﯿﺎﺑﯽ ﺗﺨﻠﯿﻪ ﺟﺰﺋﯽ در ﻋﺎﯾﻖ ﻣﺎﺷﯿﻦﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ وﻟﺘﺎژ ﺑﺎﻻ ﺑﺎ آﻧﺎﻟﯿﺰ ﻣﺪل ﻣﺪاري و ﻣﯿﺪاﻧﯽ

Locating partial discharge in insulation of high voltage electric machines using circuit-field model analysis

اﯾﻦ ﻣﻘﺎﻟﻪ آﺷﮑﺎرﺳﺎزي و ﻣﮑﺎﻧﯿﺎﺑﯽ ﺗﺨﻠﯿﻪ ﺟﺰﺋﯽ4 در ﻋﺎﯾﻖ ﺳﯿﻢﭘﯿﭻ ﻣﺎﺷﯿﻦﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ وﻟﺘﺎژ ﺑﺎﻻ را ﺗﻮﺳﻂ ﻣﺪل ﻣﺪاري و ﻣﯿﺪاﻧﯽ در آﻧﺎﻟﯿﺰ اﻟﻤﺎن ﻣﺤﺪود ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﻣﯽدﻫﺪ. اﺳﺘﻔﺎده از ﻣﺪلﻫﺎي ﮔﺬاري ﺳﺮﯾﻊ ﻣﺎﺷﯿﻦﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ، اﯾﻦ ﻣﻬﻢ را ﺑﺮاي ﻣﮑﺎﻧﯿﺎﺑﯽ ﺗﺨﻠﯿﻪ ﻫﺎي ﺟﺰﺋﯽ ﺑﺎ ﻣﻮﻟﻔﻪﻫﺎي ﻓﺮﮐﺎﻧﺴﯽ ﮐﯿﻠﻮﻫﺮﺗﺰ ﺗﺎ ﻣﮕﺎﻫﺮﺗﺰ ﻓﺮاﻫﻢ ﻣﯽﺳﺎزد. ﺑﻪ اﯾﻦ ﻣﻨﻈﻮر، ﺑﻪ ﻫﺮ دور از ﺳﯿﻢﭘﯿﭻ ﻣﺪل ﮔﺬراي ﺑﺴﯿﺎر ﺳﺮﯾﻊ ﻣﺎﺷﯿﻦاﻟﻘﺎﯾﯽ ﻗﻔﺲ ﺳﻨﺠﺎﺑﯽ6KV/250KW ﭘﺎﻟﺲ ﺟﺮﯾﺎﻧﯽ PD1 ﺑﺎ ﻣﻮﻟﻔﻪ ﻓﺮﮐﺎﻧﺴﯽ ﻣﮕﺎﻫﺮﺗﺰ ﺗﺮزﯾﻖ ﻣﯽﺷﻮد. ﺑﺎ ﻫﺪف آﺷﮑﺎرﺳﺎزي ﭘﺎﻟﺲ PD، ﺗﻤﺎﻣﯽ ﻣﻌﺎدﻻت ﻣﺪاري و ﻣﯿﺪاﻧﯽ ﺑﺮاي ﺑﻪ دﺳﺖ آوردن ﻣﺎﺗﺮﯾﺲ ﻧﻬﺎﯾﯽ ﺳﯿﺴﺘﻢ اراﺋﻪ ﺷﺪه اﺳﺖ. ﺟﻬﺖ اﻋﺘﺒﺎر ﺑﺨﺸﯿﺪن ﺑﻪ ﺻﺤﺖ و دﻗﺖ ﻣﮑﺎﻧﯿﺎﺑﯽﻫﺎ، ﺳﯿﻢﭘﯿﭻﻫﺎي ﻣﺎﺷﯿﻦاﻟﻘﺎﯾﯽ ﺑﻪ ﮐﻤﮏ ﻣﺪل ﻣﺪاري ﺧﻂ اﻧﺘﻘﺎل ﭼﻨﺪ ﺳﯿﻤﻪ در ﻧﺮماﻓﺰار ﻣﺘﻠﺐ ﻧﯿﺰ ﺷﺒﯿﻪﺳﺎزي ﮔﺮدﯾﺪ و ﭘﺲ از ﺗﺰرﯾﻖ ﭘﺎﻟﺲ PD، ﻣﮑﺎنﻫﺎي ﺗﺨﻠﯿﻪ ﺑﻪ ﮐﻤﮏ آﻧﺎﻟﯿﺰ ﺟﺮﯾﺎﻧﯽ ﺗﺨﻤﯿﻦ و اﯾﻦ ﻣﮑﺎﻧﯿﺎﺑﯽﻫﺎ ﺑﺎ ﻣﺪل ﭘﯿﺸﻨﻬﺎدي ﺑﻪ ﻣﻘﺎﯾﺴﻪ ﮔﺬاﺷﺘﻪ ﺷﺪ. ﺑﺮرﺳﯽ و ﻣﻘﺎﯾﺴﻪ ﻧﺘﺎﯾﺞ ﺷﺒﯿﻪﺳﺎزي ﻣﺎﺷﯿﻦﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ ﻣﺪل ﭘﯿﺸﻨﻬﺎدي ﻣﯽﺗﻮاﻧﺪ ﻣﮑﺎن ﺗﺨﻠﯿﻪ ﺟﺰﺋﯽ ﺑﺎ ﻣﻮﻟﻔﻪﻫﺎي ﻓﺮﮐﺎﻧﺴﯽ ﺑﺎﻻ را ﺑﺎ دﻗﺖ ﺧﻮﺑﯽ ﺗﺨﻤﯿﻦ ﺑﺰﻧﺪ.

This paper uses circuit and field models incorporated into the finite element analysis to detect and locate partial discharges (PDs) in winding insulation of high voltage electric machines. Locating PDs with KHz-MHz frequency components is enabled by fast transient models. For this purpose, a PD current pulse with MHz frequency component is injected into each winding turn of the very fast transient model of a squirrel cage induction machine 6KV/250KW. To detect the PD pulse, all field and circuit equations are presented and solved to obtain the system final matrix. In addition, to investigate the model accuracy, the induction machine windings are also simulated using the multi conductor transmission line circuit model. After injecting the PD pulse, the discharge locations are estimated using current analysis. The results are then compared with the proposed model, confirming the reasonable accuracy of the model in estimating the location of PD with high frequency components.