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HVDC Transmission Operation

Mar 03, 2016

When the DC, AC system without synchronous operation on both sides, and AC transmission must be run synchronously. When long distance power supply AC current phase at both ends of the AC system will have a significant phase difference; grid-connected system of AC frequency though uniform 50HZ, but in fact often fluctuate. These two factors cause Exchange system can't run, need to use complicated compensation system and comprehensive technical adjustments, or they may form a powerful circular current of the device on the device, or cause a sync operation blackout. In countries where technology is not developed, transmission distances are generally not more than 300km HVDC interconnection, at both ends of the system can run with their frequency and phase, synchronous adjustment is not required.