Modeling of power electronic loads in AC distribution systems using the generalized State-space averaging method
Emadi, A.
Industrial Electronics, IEEE Transactions on
Volume 51, Issue 5, Oct. 2004 Page(s): 992 - 1000
Digital Object Identifier   10.1109/TIE.2004.834950
Summary: Most of the loads in ac distribution systems have positive incremental impedance characteristic. However, power electronic loads, when tightly regulated, sink constant power from the system. Therefore, they have negative incremental impedance characteristic. This can cause negative impedance instability. Power electronic loads usually have a controlled or uncontrolled rectifier at the front end. In this paper, these loads are modeled using the generalized state-space averaging method. An assessment of their effects in ac distribution systems is also presented. Experimental results are presented to verify the proposed analysis.

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