A Less Intrusive Solution To Stablize VSC Transmission Against Highly Variable Grid Strength

Research Output

A less-intrusive solution to stabilize a Voltage Source Converter (VSC) over an unknown grid strength is presented in this paper. The existence of equilibrium point is investigated as a prerequisite to stabilization. By partially imposing grid forming control, a simple auxiliary outer loop is proposed to exhaust the physical limit of power delivery in steady state and provide support to fault-ride-through operations over a wide range of grid strength. The proposed control can be used to upgrade a commissioned VSC with inner current loop intact; it also offers a non-intrusive solution to stabilize VSCs externally. The effectiveness of the proposed approach and schemes are verified by analysis in frequency domain and case studies in time domain including change of grid strength and fault-ride-through.

Type:

Article
Date:

12 October 2020
Publication Status:

Published
DOI:

10.1109/JESTPE.2020.3030362
ISSN:

2168-6777
Funders:

Edinburgh Napier Funded

http://researchrepository.napier.ac.uk/output/2690581 Zhang, Z., Chen, D., Givaki, K., & Xu, L. (2021). A Less Intrusive Solution To Stablize VSC Transmission Against Highly Variable Grid Strength. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(6), 7199-7211. https://doi.org/10.1109/JESTPE.2020.3030362

Citation

Zhang, Z., Chen, D., Givaki, K., & Xu, L. (2021). A Less Intrusive Solution To Stablize VSC Transmission Against Highly Variable Grid Strength. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(6), 7199-7211. https://doi.org/10.1109/JESTPE.2020.3030362