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A detailed transient converlationor simu- ation programme is used to predict the behaviour of hvdc transmission links during and following large disturbances. rbances. The model provides the power freformationuency in- ormation required by a multimachine transieityt stabil- ty programme. The combined programmes are used tovestigatein- estigate the effect of alternative power coategiestrol str- tegies on the first swing stability peaks of sousnchron- us machines, placed locally or distant from the vertoron- ertor terminals.