Abstract
This paper has proposed a phase controlled and PWM controlled power current source converter (CSC) for transmission line de-icing. The proposed system consists of a high-power thyristor-based line commutated converter to contribute a majority of the dc de-icing current and a low power PWM CSC to provide a part of the dc de-icing current and to compensate the low order harmonic ac current from the TCR. Thus, the grid current can be highly sinusoidal. In order to avoid the resonance caused by the interaction between TCR and PWM CSC, a virtual impedance control is implemented in the PWM CSC without using any additional sensors. Comprehensive verification results have been obtained to validate the correctness of the proposed approach.
Highlights
7UDQVPLVVLRQ OLQH iGF)LJXUH &LUFXLW GLDJUDP RI WKH SURSRVHG K\EULG FXUUHQW VRXUFH EDVHG GF GHLFLQJ V\VWHP.
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
)RU WKLV V\VWHP WKH KLJK GF FXUUHQW IRU GHLFLQJ LV FRQWUROOHG E\ WKH FRRUGLQDWLRQ RSHUDWLRQ RI ERWK FRQYHUWHUV ,Q DGGLWLRQ LW LV ZHOO XQGHUVWRRG WKDW WKH /&& FRQYHUWHU KDV QRQWULYLDO ULSSOH FXUUHQW LQ WKH DF VLGH ZKLFK LV XVXDOO\ FRPSHQVDWHG E\ WKH WXQHG KDUPRQLF ILOWHUV )RU WKLV V\VWHP WKH IOH[LEOH FRQWURO RI 3:0 &6& DOVR RIIHUV WKH SRVVLELOLW\ WR DFWLYHO\ FRPSHQVDWH WKH ULSSOHV IURP /&& FRQYHUWHU $FFRUGLQJO\ WKH FRVW RI WKH SDVVLYH ILOWHUV FDQ EH UHGXFHG
Summary
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
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
