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PROJECT TITLE :

Loss-of-excitation analysis and protection forpumped-storage machines during starting - 2016

ABSTRACT:

The reversible synchronous machines in an exceedingly pumped station are place into operation frequently for effective operation of the hydro pumped-storage system. The detection of loss-of-excitation (LOE), which may be a common failure for synchronous machines, must be guaranteed not solely in traditional operation, however additionally underneath starting and different doable operation conditions. A model of pumped-storage units underneath the beginning 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 throughout beginning were analysed for the primary time. Since the frequency of voltage and current runs up gradually from zero to the rated frequency throughout beginning, typical LOE protections based mostly on impedance underneath the rated frequency should be disabled during starting. For this reason, a unique LOE protection was developed primarily based on the R-L time-domain model and the smallest amount-sq. algorithm. Theoretical analysis and simulation tests demonstrate that the proposed LOE protection method is correct and valid.


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Starting Time-Domain Analysis Least Mean Squares Methods Power System Protection Pumped-Storage Power Stations Synchronous Machines Loss-Of-Excitation Hydro Pumped-Storage System Pumped Station Reversible Synchronous Machine
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