4.7 Article

Analysis of 0.1-Hz Var Oscillations in Solar Photovoltaic Power Plants

Journal

IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
Volume 14, Issue 1, Pages 734-737

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2022.3220083

Keywords

Grid integration; solar photovoltaic; oscillations; plant control

Ask authors/readers for more resources

Low-frequency oscillations at 0.1 Hz have been observed in voltage and var in practical solar photovoltaic systems, and this letter provides an explanation for their formation. Three critical factors leading to the oscillations are identified: communication delay between plant-level and inverter-level control, high volt/var sensitivity at high power exporting levels, and the volt-var feedback system involving plant control, inverter control, and grid impact. Additionally, the critical feature of the 0.1 Hz oscillation is explained, which is the absence of oscillations in real power.
Oscillations with very low frequency at 0.1 Hz, have been observed in voltage and var in practical solar photovoltaic (PV) systems when power exporting ramps up to a certain level. This letter provides an explanation on the formation of 0.1-Hz oscillations and identifies three critical factors that lead to the oscillations: communication delay between the plant-level control and the inverter-level control, high volt/var sensitivity at a high power exporting level, and the volt-var feedback system consisting of the plant control, inverter control and the grid impact. Furthermore, a critical feature of the 0.1-Hz oscillation is also explained: why oscillations appear only in voltage and var, but not in real power.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available