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Questions tagged [power-quality]

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-1
votes
1answer
41 views

How to decide where to place devices for power quality handeling [closed]

In a facility that experienced voltage sags where 175 KVA of the load is sensitive, and we are asked to implement MG set or flywheels to handle the power quality issues. where should the MG set/ ...
0
votes
4answers
84 views

what causes voltage harmonics

People keep telling me that Nonlinear loads causes current harmonics and when i ask them about what causes voltage harmonics, they tell me wherever there is current harmonics there is voltage ...
0
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2answers
61 views

How to compensate for grid quality changes in three phase power

Suppose I measure both current and voltage going to an electric motor. So that I have two continuous streams of three phase data (current and voltage). I want to use this data to diagnose potential ...
0
votes
2answers
115 views

Can a AC generator be powered by D.C.?

I have a very specific need. I need to avoid a VFD due to its square waves - my research requires exact sinwave frequencies of electrical current. With that said I have a Tesla turbine which powers ...
0
votes
1answer
674 views

Measuring Q and Bandwidth of an RLC series circuit using Oscilloscope

I have a HNC Lab assignment coming up. As part of the prep for the lab work we have been given an RLC series circuit for which we had to calculate some values such as volt drop , Wn, Q and Bs, which I'...
3
votes
3answers
489 views

Microcontroller power directly from SMPS DC-DC (SPR01 series) - is it OK?

Is it OK to supply power durectly from 5V SMPS DC-DC converter? Of course I will put several capacitors: at the DC-DC output (I'd put 1uF or something), at the controller power input(s) (I'd put ...
0
votes
1answer
1k views

What is the difference between voltage UNBALANCE and voltage IMBALANCE?

I'm a Brazilian (so not a native English speaker) who just came across the user guide of a power quality analyser which has, among its features, measurement of both "voltage unbalance" as well as "...
3
votes
3answers
5k views

How do residential analog and smart meters measure power?

I'm building my own digital meter in order to upload the data to a SQL database; up until now I know that there are several parameters being measured into a digital watt-meter: volts, current, ...
7
votes
6answers
1k views

What is the physical/electrical limit of audio quality?

A few days ago I was in a class about electronics on my study. The first lesson was an introduction into the main subject, bits, analog signals, conversion, etc. An example was asked by the teacher: ...
0
votes
2answers
159 views

Using triacs to switch more complex equipment than just motors and lights?

Obviously triacs have been well known to be used in applications which don't really require a perfect sine wave to function. However, what about say a triac to switch on and off more complicated ...