A NEW APPROACH FOR MODELLING OF MULTITERMINAL DC SYSTEM IN LOAD FLOW PROGRAMS

摘要

The conventional methods of the DC network modelling in the existing AC load flow program need structural changes in the AC part. As a result, in the case of an advanced AC program this combination becomes a difficult and complex programming effort. This paper presents a new and practical approach for solving the AC-DC load flow problem, whose DC system can be a multiterminal DC network. The presented approach just models the converters and it uses the AC load flow to solve other parts of DC network with a simple transformation.