  This paper presents a distributed simulation based method for harmonic
resonance assessment (HRA) in multi-area large-scale power systems. Further
consideration is devoted to the early harmonic frequency-scan formulation to
shape them into a Bordered Blocked Diagonal Form (BBDF), which is suitable for
parallel processing. The proposed algorithm (BBDF) allows operator of each area
of an interconnected system to independently conduct the HRA. A large-change
sensitivity based approach is then handled in a secure platform to apply the
effects of whole network to each single area. The introduced decentralized HRA
is capable to find the exact values as those of the interconnected system
through TCP/IP communication media. The developed method is successfully
implemented in an existing software package and applied to IEEE 14-bus harmonic
test system, followed by a discussion on results.
