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000000010 001__ 10
000000010 037__ $$aENY-ARTICLE-2008-009
000000010 041__ $$aeng
000000010 100__ $$aLobos, T$$uWroclaw University of Technology, Poland
000000010 245__ $$aReal-Time Determination of Power System Frequency
000000010 260__ $$c1997-05-30
000000010 300__ $$a5p
000000010 500__ $$aIEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, VOL. 46, NO. 4, AUGUST 1997, pp. 877-881
000000010 520__ $$aThe main frequency is an important parameter of an electrical power system. The frequency can change over a small range due to generation-load mismatches. Some power system protection and control applications, e.g., frequency relay for load shedding, load-frequency controller, require accurate and fast estimation of the frequency. Most digital algorithms for measuring frequency have acceptable accuracy if voltage waveforms are not distorted. However, due to nonlinear devices, e.g., semiconductor rectifiers, electric arc furnaces, the voltage waveforms can include higher harmonics. The paper presents a new method of measurement of power system frequency, based on digital filtering and Prony’s estimation method. Simulation results confirm, that the proposed method is more accurate than others, e.g., than the method based on the measurement of angular velocity of the rotating voltage phasor.
000000010 6531_ $$aDiscrete Fourier transforms
000000010 6531_ $$aFIR digital filters
000000010 6531_ $$afrequency measurement
000000010 6531_ $$apower system parameter estimation
000000010 6531_ $$aprotective relaying
000000010 700__ $$aRezmer, J$$uWroclaw University of Technology, Poland
000000010 8560_ $$fzbigniew.leonowicz@pwr.wroc.pl
000000010 8564_ $$uhttp://zet10.ipee.pwr.wroc.pl/record/10/files/$$zAccess to Fulltext
000000010 909CO $$ooai:zet10.pwr.wroc.pl:10$$pglobal
000000010 980__ $$aARTICLE