Frequency-domain modelling of interharmonics in HVDC systems
作者： C.M. Osauskas , D.J. Hume , A.R. Wood
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摘要: A fast and accurate method for the direct calculation of noncharacteristic frequencies occurring around HVDC links is presented. The technique calculates small signal linearised frequency crosscoupling interrelationships both converters about a base operating point, modelling coupling with matrix transfers. full system, including AC DC systems, modelled by connecting all individual transfers together appropriate system equations nodal analysis. resulting equation set rearranged solved directly unknown interharmonic quantities. Returned subsynchronous effect switching instant variation are discussed. validated against time-domain simulation, two different asynchronous links, excellent results.
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