HVDC, 12-pulse, 1 GW, transmission system

This demo models a 1000 MW (500 kV, 2 kA), high voltage dc (HVDC) link used to transmit power from a 500 kV, 5000 MVA, 60 Hz network to a 345 kV, 10 000 MVA, 50 Hz network.

The rectifier and the inverter are 12-pulse converters. The rectifier and the inverter are interconnected through a 300 km distributed parameter line and two 0.5 H smoothing reactors. The transformer tap changers are not simulated and fixed taps are assumed. The tap factor used on the primary voltage is 0.90 on rectifier side and 0.96 on inverter side. Reactive power required by the converters is provided by a set of capacitor banks plus 11th, 13th and high pass filters for a total of 600 MVAR on each side. Two circuit breakers are used to apply faults on the inverter AC side and the rectifier DC side.

This model can be used to study and validate various phenomena related to HVDC systems. HVDC start-ups and shut-downs, dc link fault, different ac faults at rectifier/inverter side, thyristor misfire, and etc, can be studied with this model.

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