By HDK / Published on Wed, 2009-05-27 07:38
Phase disturbances in electric power signals are neglected and only amplitude (envelope) distortions are discussed in literature. Amplitude disturbances are interpreted as Amplitude Modulation (AM) of the main 50 Hz frequency. Detailed analyses of all disturbances and their sources are presented in this paper. It is shown that AM and narrow band PM (phase modulation) take place in power networks simultaneously, and those two modulations interact with each other. Voltage variation is proposed for disturbance measurement.
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By Hans De Keulenaer / Published on Tue, 2008-01-22 18:39
By C Rong et al
The UIE/IEC flickermeter is built based on 60W 230V incandescent lamp. It cannot be used to measure the flicker level for other lamp types. The flickermeter can be improved for different lamp types by using different weighting filters, which can represent the flicker responses of different lamp types. Five lamp models for different lamp types are derived in this paper by using the system identification method.
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