A study on VSC-HVDC based black start compared with traditional black start

A good black-start scheme is important and necessary to resume power supply fast and efficiently after black out, and how to choose black-start power is the first thing to consider in the scheme. In this paper, the advantages of VSC-HVDC as black start power are analyzed with contrast to traditional black start power. The ability of VSC-HVDC to soft energize major power system equipment is proved through simulation by software PSCAD/EMTDC. Simulation waveforms during soft energization are illustrated. These plots have described the good voltage and frequency characteristics of VSC-HVDC. The transition from one control mode of VSC to another is also discussed. Simulation results indicate that by using soft energization, VSC-HVDC is an ideal black start power.