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In the last 3 years, HVDC technology has been extended to much higher voltages and currents than before, particularly for large back to back and interconnector schemes in rapidly developing countries such as China and Brazil. HVDC schemes are being built with voltage ratings as high as 800kV, with current ratings of up to 4500A today and 4750A planned in the near future. These increases of rating...
HVDC (High Voltage Direct Current) transmission is considered as a mature technology to meet the demand for the bulk power transmission over long distances and provide flexibility for the network interconnections. For ultra-high voltage HVDC applications, the significant effects of the stray capacitance on the voltage imbalance for thyristor converters have to be considered during the transient conditions...
Experimental development of dynamic models for the saturable reactor for HVDC applications was made by taking account of the effects of the eddy-current, the air gap, and the nonlinear magnetisation of the cores of the 3% grain-oriented silicon steels used. The experimentally developed models were confirmed by comparing them to measurements with regard to step current, rate of change of the reactor...
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