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Two novel schemes suitable for static switching of three-phase delta-connected capacitor banks with minimum surge current

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4 Author(s)
Nandi, S. ; Central Testing & Res. Lab., Central Power Res. Inst., Bangalore, India ; Biswas, P. ; Nandakumar, V.N. ; Hedge, R.K.

Delta-connected capacitor banks are used for power factor improvement of balanced three-phase loads (e.g., three-phase induction motors, etc.) and are normally switched in and out using antiparallel thyristors. This paper describes two new schemes for switching delta-connected capacitor banks. While the first scheme can be readily used for existing delta-connected capacitor banks, the second scheme can switch delta-connected capacitor banks in and out very quickly and, hence, is suitable for static VAr compensator (SVC) applications

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Industry Applications, IEEE Transactions on  (Volume:33 ,  Issue: 5 )