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The capacitor-commutated converter (CCC) has frequently been used in the conception of HVDC systems connected to busbars with low short circuit level. This alternative arrangement, in substitution to the conventional ones, guarantees less sensitive operational conditions to problems related with the commutation failure in the inverters besides supplying part of the reactive energy to be compensated...
This paper describes part of our recent works on a project of China Southern Power Grid (CSG), which involves the simultaneous coordinated tuning of the three HVDC modulation controllers, with wide-area signals, in 2008's CSG to damp interarea oscillations. Due to the modeling limitation of HVDC control loops in small signal stability analysis, previous works on similar projects of CSG strongly depended...
The Apollo Songo HVDC scheme receives power generated at Cahora Bassa hydro power station. At Songo converter station, this power is converted to dc and sent to Apollo converter station. At present, the scheme is rated to send about 1920 MW from Songo. There is a potential for new generation capacity in Mozambique due to availability of gas and hydro fuels. A possibility of transporting some of this...
The potential differences caused by the current injected in the ground by a HVDC-electrode can cause corrosion of e.g. pipelines and operational problems in transformer stations. Also, hazardous electric fields can arise in the vicinity of HVDC- electrodes. High potentials and strong fields from electrodes are, in principle, related to high-resistivity rock in the ground. The presence of such potentially...
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