Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation

The main merit of grid-connected adjustable-speed pumped storage unit (ASPSU) is the capability to control the pumping power flexibly, which contributes to active power balance in power system operation. Physics-based dynamic modeling of ASPSU in pumping mode under power regulation is the foundation...

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Autores principales:	Zhu Zhu, Wenxia Pan, Tongchui Liu, Ye Li, Mingyang Liu
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Adjustable-speed pumped storage unit (ASPSU) pumping mode dynamic modeling eigen analysis Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/06430bb31a444d88b02d22049004b5e6
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spelling	oai:doaj.org-article:06430bb31a444d88b02d22049004b5e62021-11-26T00:01:21ZDynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation2169-353610.1109/ACCESS.2021.3128627https://doaj.org/article/06430bb31a444d88b02d22049004b5e62021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9617583/https://doaj.org/toc/2169-3536The main merit of grid-connected adjustable-speed pumped storage unit (ASPSU) is the capability to control the pumping power flexibly, which contributes to active power balance in power system operation. Physics-based dynamic modeling of ASPSU in pumping mode under power regulation is the foundation of the quantitative analysis on its transient performance, which has been studied inadequately. This study aims to derive a dynamic model of ASPSU in pumping mode which embodies reversible pump-turbine characteristics, and to conduct eigen analysis on ASPSU in pumping mode which facilitates a better understanding of its intrinsic dynamics. Firstly, the dynamic model of reversible pump-turbine is revealed to depict its regulation properties that the pumping power is adjusted by rotational speed rather than guide vane opening. Then, the state-space representation of ASPSU in pumping mode is established to be utilized with small disturbances (including indicial and ramp tests) and validated by comparing simulated results with actual records of a commissioned ASPSU in Japan. It is also effective for compensating the wind power fluctuations based on a timescale of seconds in simulation. Finally, the eigenvalues, damping ratios, and participation factors of the state variables are investigated based on the small-signal-stability model of ASPSU in pumping mode under power regulation. The results of eigen analysis indicate that the small-signal behavior of the system is characterized by electromechanical mode and electromagnetic mode, and the latter is dominant. Moreover, the damping ratio of electromagnetic mode which is sensitive to system stability needs to be increased.Zhu ZhuWenxia PanTongchui LiuYe LiMingyang LiuIEEEarticleAdjustable-speed pumped storage unit (ASPSU)pumping modedynamic modelingeigen analysisElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 155035-155047 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Adjustable-speed pumped storage unit (ASPSU) pumping mode dynamic modeling eigen analysis Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Adjustable-speed pumped storage unit (ASPSU) pumping mode dynamic modeling eigen analysis Electrical engineering. Electronics. Nuclear engineering TK1-9971 Zhu Zhu Wenxia Pan Tongchui Liu Ye Li Mingyang Liu Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation
description	The main merit of grid-connected adjustable-speed pumped storage unit (ASPSU) is the capability to control the pumping power flexibly, which contributes to active power balance in power system operation. Physics-based dynamic modeling of ASPSU in pumping mode under power regulation is the foundation of the quantitative analysis on its transient performance, which has been studied inadequately. This study aims to derive a dynamic model of ASPSU in pumping mode which embodies reversible pump-turbine characteristics, and to conduct eigen analysis on ASPSU in pumping mode which facilitates a better understanding of its intrinsic dynamics. Firstly, the dynamic model of reversible pump-turbine is revealed to depict its regulation properties that the pumping power is adjusted by rotational speed rather than guide vane opening. Then, the state-space representation of ASPSU in pumping mode is established to be utilized with small disturbances (including indicial and ramp tests) and validated by comparing simulated results with actual records of a commissioned ASPSU in Japan. It is also effective for compensating the wind power fluctuations based on a timescale of seconds in simulation. Finally, the eigenvalues, damping ratios, and participation factors of the state variables are investigated based on the small-signal-stability model of ASPSU in pumping mode under power regulation. The results of eigen analysis indicate that the small-signal behavior of the system is characterized by electromechanical mode and electromagnetic mode, and the latter is dominant. Moreover, the damping ratio of electromagnetic mode which is sensitive to system stability needs to be increased.
format	article
author	Zhu Zhu Wenxia Pan Tongchui Liu Ye Li Mingyang Liu
author_facet	Zhu Zhu Wenxia Pan Tongchui Liu Ye Li Mingyang Liu
author_sort	Zhu Zhu
title	Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation
title_short	Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation
title_full	Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation
title_fullStr	Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation
title_full_unstemmed	Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation
title_sort	dynamic modeling and eigen analysis of adjustable-speed pumped storage unit in pumping mode under power regulation
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/06430bb31a444d88b02d22049004b5e6
work_keys_str_mv	AT zhuzhu dynamicmodelingandeigenanalysisofadjustablespeedpumpedstorageunitinpumpingmodeunderpowerregulation AT wenxiapan dynamicmodelingandeigenanalysisofadjustablespeedpumpedstorageunitinpumpingmodeunderpowerregulation AT tongchuiliu dynamicmodelingandeigenanalysisofadjustablespeedpumpedstorageunitinpumpingmodeunderpowerregulation AT yeli dynamicmodelingandeigenanalysisofadjustablespeedpumpedstorageunitinpumpingmodeunderpowerregulation AT mingyangliu dynamicmodelingandeigenanalysisofadjustablespeedpumpedstorageunitinpumpingmodeunderpowerregulation
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Dynamic Modeling and Eigen Analysis of Adjustable-Speed Pumped Storage Unit in Pumping Mode Under Power Regulation

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