NDLI: Loss-of-excitation analysis and protection for pumped-storage machines during starting

Content Provider	IET Digital Library
Author	Li, Bin Duan, Zhitian Wang, Xin Wu, Jianzhong
Abstract	The reversible synchronous machines in a pumped station are put into operation frequently for effective operation of the hydro pumped-storage system. The detection of loss-of-excitation (LOE), which is a common failure for synchronous machines, must be guaranteed not only in normal operation, but also under starting and other possible operation conditions. A model of pumped-storage units under the starting condition was developed using the SimPowerSystems in Matlab/Simulink. The simulation results and real tests of a pumped-storage power plant in northeast China were presented. The LOE characteristics during starting were analysed for the first time. Since the frequency of voltage and current runs up gradually from zero to the rated frequency during starting, conventional LOE protections based on impedance under the rated frequency have to be disabled during starting. For this reason, a novel LOE protection was developed based on the R–L time-domain model and the least-square algorithm. Theoretical analysis and simulation tests demonstrate that the proposed LOE protection method is correct and valid.
Starting Page	71
Ending Page	78
Page Count	8
ISSN	17521416
Volume Number	10
e-ISSN	17521424
Issue Number	Issue 1, Jan (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/10/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2015.0013
Journal	IET Renewable Power Generation
Publisher Date	2016-01-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Hydro Pumped-storage System Interpolation And Function Approximation Least Mean Squares Method Least Square Algorithm LOE Protection Loss-of-excitation Numerical Analysis Power System Protection Pumped Station Pumped Storage Machine Pumped Storage Power Plant Pumped Storage Stations And Plant Pumped-storage Power Stations Reversible Synchronous Machine R–L Time-domain Model SimPowerSystem Starting Starting Condition Synchronous Machine Time Domain Analysis
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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