Title :
Utilization of cable capacitance in GTO-HVDC transmission
Author :
Yao, Ziwen ; Ooi, Boon Teck
Author_Institution :
Dept. d´´Ingenierie, Quebec Univ., Trois-Rivieres, Que., Canada
fDate :
7/1/1998 12:00:00 AM
Abstract :
The voltage-source, GTO-HVDC stations require capacitor banks at their DC terminals for two purposes: (i) filtering of the GTO switching noise and (ii) voltage support. This paper examines the feasibility of exploiting the capacitance of submarine and/or underground cables, thus offsetting some of the cost. It is shown that the capacitance of cable length as short as 10 km can significantly reduce the total harmonic distortion (THD) of the DC voltage from 7.76% to 2.26%. However, the THD of the DC current is of the order of 18%. An inductor of 20 mH (0.106 p.u.) is sufficient to reduce the current THD to 7%. The cable is modeled as L-R-C π section representation of the transmission line (1-section per km). The results are obtained by digital simulations (Matlab/Simulink)
Keywords :
HVDC power convertors; HVDC power transmission; capacitance; capacitor storage; power cables; power system harmonics; submarine cables; thyristor convertors; underground cables; DC current THD; DC terminals; GTO switching noise filtering; GTO-HVDC transmission; L-R-C π section representation; Matlab/Simulink; cable capacitance; capacitor banks; digital simulations; submarine cables; total harmonic distortion reduction; transmission line; underground cables; voltage source converters; voltage support; voltage-source GTO-HVDC stations; Capacitance; Capacitors; Costs; Filtering; Inductors; Mathematical model; Power cables; Total harmonic distortion; Underwater vehicles; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
