A Control Method for Switching-Type Frequency Oscillations in Hydropower System Based on Adjusting Dead Zone Structure

Hongtao Xiong, Boxiong Zhang, Boliang Lou, Xiaobo Liu, Shan Hou, Jiawei Wang, Ancheng Xue

2022

Abstract

For the switching-type ultra-low frequency oscillation (ST-ULFO) that cannot be suppressed by increasing damping, in the single-hydropower-generator power system (SHG-PS) with enhanced dead zone, a control method based on adjusting the non-smooth structure of the dead zone is proposed. First, the model of the SHG-PS with enhanced dead zone, corresponding to Filippov non-smooth system, and the ST-ULFO phenomenon are introduced. Second, a case of oscillation cannot be suppressed by increasing system damping, as the system equilibrium point disappeared under disturbance, is introduced. Next, a construction method to make the enhanced dead zone continuous is given. Then, the Hopf-like non-smooth bifurcation characteristics of the equilibrium point and the post fault dynamics of the SHG-PS before/after the enhanced dead zone continuity are compared. Finally, the effectiveness of control method is verified in the SHG-PS and the 2-area-4-generators system. The results show that, the oscillations which cannot be suppressed by increasing system damping, will be effectively suppressed by adjusting the enhanced dead zone structure.

Paper Citation

in Harvard Style

Xiong H., Zhang B., Lou B., Liu X., Hou S., Wang J. and Xue A. (2022). A Control Method for Switching-Type Frequency Oscillations in Hydropower System Based on Adjusting Dead Zone Structure. In Proceedings of the 3rd International Symposium on Automation, Information and Computing - Volume 1: ISAIC; ISBN 978-989-758-622-4, SciTePress, pages 633-638. DOI: 10.5220/0012004400003612

in Bibtex Style

@conference{isaic22,
author={Hongtao Xiong and Boxiong Zhang and Boliang Lou and Xiaobo Liu and Shan Hou and Jiawei Wang and Ancheng Xue},
title={A Control Method for Switching-Type Frequency Oscillations in Hydropower System Based on Adjusting Dead Zone Structure},
booktitle={Proceedings of the 3rd International Symposium on Automation, Information and Computing - Volume 1: ISAIC},
year={2022},
pages={633-638},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012004400003612},
isbn={978-989-758-622-4},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 3rd International Symposium on Automation, Information and Computing - Volume 1: ISAIC
TI - A Control Method for Switching-Type Frequency Oscillations in Hydropower System Based on Adjusting Dead Zone Structure
SN - 978-989-758-622-4
AU - Xiong H.
AU - Zhang B.
AU - Lou B.
AU - Liu X.
AU - Hou S.
AU - Wang J.
AU - Xue A.
PY - 2022
SP - 633
EP - 638
DO - 10.5220/0012004400003612
PB - SciTePress