A Novel method to trace flicker sources

Voltage flicker is a common phenomenon of power quality problems which is referred to asvoltage low frequency fluctuations modulated on carrier signal. Voltage flicker creates some variationsin network voltage. In order to mitigate flicker, the flicker source should be identified. This paperproposes a novel method to determine the direction of flicker flow by using flicker powermeasurement. At first, low frequency fluctuations are separated from monitored signals by usingcoherent phase demodulation and wavelet transform. Then the flicker power is computed via voltageand current envelopes. The direction of flicker flow in network is obtained from the sign of the flickerpower. The proposed algorithm has been validated by simulations.

Keywords:

Flicker , Flicker Assessment , Flicker Power Flow , IEC 61000-4-15 , Power Quality