Week 11
Power Quality Analysis & Testing the Inverter (Parallel Work)
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Power Quality Analysis
Power Quality Analysis
THD value of current and voltage were observed for power quality analysis. This was done in 2 steps.
Observed the current and voltages with the negative half noise.
Observed the waveforms after the noise filtering techniques used in noise analysis in previous week.
Figure: Testing setup with the THD Analyzer
YOKOGAWA power quality analyzer is a reliable device to measure harmonics and quantify them.
Figure: Signal before noise elimination
Figure: Signal after noise elimination
Figure: Power quality analyzer interface screen
Power quality analyzer displays the RMS Voltages and Currents , THD Value etc. (Input DC voltage =200 V and modulation index is 0.8)
THD values should be less than 5% , for a good inverter.
Conclusions
Conclusions
Harmonics are still present in the system.
Our next task is to minimize the THD value under 5% with good filtering characteristics.
Parallel Work
Parallel Work
Initial Voltage testing
Initial Voltage testing
100 V
150 V
200 V
Voltage and Current Testing
Voltage and Current Testing
100 V
100 V Zoomed View
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