Properties and Physical Interpretation of the Dynamic Interactions between Voltage Source Converters and Grid:Electrical Oscillation and Its Stability Control

What is it about?

This paper is intended to reveal the mechanism behind electrical oscillations observed in the grid-tie Voltage-source-converter, as well as the stability issues.

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Why is it important?

To learn the small-signal-stability of VSC in the perspective of physical understanding is important. This paper is a complementary work to the impedance-based stability analysis tool, which is numerical-oriented. This paper gives physical insights, and comes up with an analytical stability criterion.