TITLE:
Influence Caused by Harmonic and Filtering Methods of Synchronous Generator in Short-capacity System
AUTHORS:
Chunming Wang, Cong Pan, Jingjing Chen, Pengchao Song, Jian-ke Li
KEYWORDS:
Short-capacity System; Synchronous Generator; Harmonic; Instantaneous Power; Active Filtering
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
13,
2013
ABSTRACT:
Relative to the power grid, the short-capacity system
has smaller inertia and weaker ability to bear disturbance. As a result, the
synchronous generator in short-capacity system will be greatly influenced by
harmonic. To reveal how harmonic influence the generator, this article analyzed
how harmonic current will influence the output voltage. Deduced a formula that
can describe the electromagnetic torque pulsation brought by the theory of
Instantaneous Power, which can explain why generator’s shaft vibrates. Then
this article evaluated the applicability of current filtering methods in view
of characteristics of the small capacity of the system. As a result, it was
demonstrated that active filtering method is best suited for small capacity
system. At last, it conducted the experiment that diesel generator set supply
power to non-liner load to demonstrate the conclusion of theoretical analysis.