Sri Jagadguru Chandrasekaranathaswamiji Institute of Technology
Question
Asked 22nd Feb, 2015
What is the difference between current harmonics and voltage harmonics? How should i measure each of them using a clamp on power meter?
How and where should i measure current harmonics and voltage harmonics using a clamp on power meter in a dSTATCOM ?
Most recent answer
Harmonics are generated due to non linearity, periodic switching circuits such as convertors and due to non conformity with ideal machines e.g sinusoidal conductor distributions , slots etc. Regarding voltage and current harmonics please see attached pdf which contains a very simple nonlinear transformer pspice model with a sinusoidal voltage source generating current harmonics from the load side. If the voltage source is replaced with current source you should be able to observe voltage harmonics.
Suggest you use rogowski coil for current m/s and same with high impedance parallel resistor across terminals calibrated to read voltage.
Hope you find it useful..
Cheers
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Popular answers (1)
Hi
Please see this link:
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All Answers (7)
Akdeniz University
Both of the current and voltage are measured same structure. in other words, current are measured like voltage measuring.
1 Recommendation
Electronics Research Institute
When you used the power meter, there are some program to calculate the harmonic
and the max. harmonic of voltage under 5% and 20% for the current
National University of Sciences and Technology
you will require a Power analyzer and not just an ordinary clamp meter
1 Recommendation
Birla Vishvakarma Mahavidyalaya Engineering College
Current Harmonics are caused by non-linear loads even though votage is pure sinusoidal. The voltage harmonics generated due to flow of non-linear current through system impedance and results in corruption of source voltage. Power analyser used to detect current and voltage harmonics.
3 Recommendations
Sri Aurobindo Institute of Technology, Indore, India
Current and voltage harmonics both are generated due to nonlinear loads. But the difference is current harmonics are generated in the source side (eg input of rectifier) and the voltage harmonics are generated at output of nonlinear converters which output is AC (eg. Inverter output) or due to uneven generator design. Harmonics Analyzer or Power Analyzer can be used to get current and voltage harmonics. You can also use some standard DSO for measuring harmonics.
1 Recommendation
Sri Jagadguru Chandrasekaranathaswamiji Institute of Technology
Harmonics are generated due to non linearity, periodic switching circuits such as convertors and due to non conformity with ideal machines e.g sinusoidal conductor distributions , slots etc. Regarding voltage and current harmonics please see attached pdf which contains a very simple nonlinear transformer pspice model with a sinusoidal voltage source generating current harmonics from the load side. If the voltage source is replaced with current source you should be able to observe voltage harmonics.
Suggest you use rogowski coil for current m/s and same with high impedance parallel resistor across terminals calibrated to read voltage.
Hope you find it useful..
Cheers
1 Recommendation
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