Electrical power energy auditing

I am doing a project on power supply monitoring system with labview. The main aim of the project is monitoring and data logging the signals from non contact type hall effect current sensors. Voltage and current are the two main parameters which is to be measured. Electrical power is the another parameter need to measure. I don't know how to start the task.
Help me......
Just give me a basic idea of how to start and provide me a basic vi for the task.

Hi sharavanen,
Sorry for replying late.
I suggest you refer to COMTRADE Logging examples from EPS toolkit. This example provides a solution to log voltage and current parameters (and other "electrical power" parameters if you add such VI's mainly from PQ category in the palette).
There are things that you should notice:
1. Choose your wiring method on the block diagram.
2. If you need to log more paramters, you have to add such VIs yourself. You can refer to Power Quality examples in this regard.
3. If you choose to use other target and/or modules than what's in the example, you have to modify the target in the project and/or FPGA VI to convert the fixed point data precision (details in the example's builtin help and description).

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I was transferring data from my old iMac to my new iMac via Time Machine. After about 4 hours, the electrical power fluctuated and turned off my wi-fi. Now most of my necessary programs are useless. How do I erase that mess and start over?

Hello there, LynnS.
The following Knowledge Base article and it's referenced link should get you started with the Erase and Install of Mavericks:
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Hi to all,
I want to measure the harmonics in a waveform. I take the THD block which is present in the Electrical Power Suite, but the input to that THD block is spectra but not waveform. So please help me in converting the waveform into spectra.
Awaiting Reply,
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I do not have that suite, so I am not sure of the exact requirements. LabVIEW has several VIs in the Signal Processing >> Spectral, Waveform Measurements, and Transforms palettes. One of those may be what you need.
Lynn

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Dear all,
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My customer is doing capacitor testing. He would like to measure the phase angle whiile varying the source frequency. Can the Electrical Power Suite be used for this? If not can you make a recommendation (basically for measuring power factor)?

I do not have the Electrial Power Suite so I cannot comment on its suitability. In addition to posting here, there is an Electrial Power Suite on the Forums, although it gets very little traffic. Some of the NI people involved with the suite seem to monitor that Board.
Assuming that your customer has suitable instrumentation and data acquisition hardware, it should not be too difficult to measure/calculate phase angle with LabVIEW and standard DAQ drivers.
Can you be more specific about the equipment?
Lynn

Will Non-DSA Simultaneous Cards (such as the 9220) Work with the Electrical Power Suite?

Hello, All!
I wondered if the 9220, and other non-delta-sigma (DSA) c-series modules, will still work with the Electrical Power Suite. From the overview on the product page:
Supported Hardware
C Series Modules
-The suite meets standard accuracy requirements when used with the NI 9225 (high voltage) and NI 9227 (5 A current) C Series modules.
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Note that a few modules are listed explicitly, and it sounds like any self-timed delta-sigma module (eg the 9229, 9232, 9234, 9239) will work appropriately, and that multiplexed modules (eg 9201, 9205) will not work. However, what about non-DSA simultaneous cards such as the 9220? Note also that supported hardware is not explicitly listed in the 2012 EPS Readme, so I wanted to check.
Please let me know!
Will Hilzinger | Switch Product Support Engineer | National Instruments

[originally posted 7-19-2013]
Hello, Fang!
Thank you for the information! The question is from a customer who is an Alliance Partner. They don't have to use the 9220, but would very much like to. Please let me know if you have any further questions for me, and thank you again!
Best,
Will H | Applications Engineering | National Instruments
Will Hilzinger | Switch Product Support Engineer | National Instruments

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Hi,
It's me again. I'm trying to set up a very simple 1-phase electrical power measurement system. I have found this link: http://sine.ni.com/nips/cds/view/p/lang/en/nid/208111. Here it's done with a DAQ system. I would like to use the same code, but with the CompactRIO. The question is how to connect the channelinput of the voltage and that of the current, to finally get the power reading. And how can I get a sine figure on the chart?
See attachment.
Soedarman
Attachments:
code.doc ‏209 KB

Hello Mr. Soedarman,
To do these Power Measurements it's better to better use the following software:
http://zone.ni.com/devzone/cda/tut/p/id/11336
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

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Hello,
The data acquisition training course offerred by National Instruments can be found at ni.com/training. This class offers an excellent forum to learn quickly, and effectively, some of the basics and more advanced data acquisition topics. The course is offerred in a variety of different ways.
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Hi!
I am looking for a good solution for the following:
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Of course the resistivity is slightly different at different temperatures, so that is why I think I need active control.
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Hi,
Everything is set up for the hardware. I generate the DC voltage with a NI Static waveform card (DAQmx). I measure the voltage drop and the current (via voltage drop measurement on a calibrated resistor connected in serial with the heater wire) with a Keithley DVM via GPIB card. The SetPoint is the required electrical power, the ProcessVariable is the calculated power from the measured U and I. The output is the driving voltage between 0-3 DC Volts, what I amplify with a factor 5.8 with an amplifier connected to the heater wire.
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hi there, i am very upset since my iphone 4 stopped working, last night i connected it to my macbook pro and showed me that a new update was ready for4 my phone, i click on it and it started showing that it was downloading, afterwards when it was downloaded i continued to update the phone, just before the blue bar was showing that was almost ready something happened and showed me on the screen errror 6 (what is error 6?) after that it showed me on nthe screen that i needed to restore my phone in order to keep going, at this point it was showing on the screen the symbol of itunes and the little usb cord, after that it got stock and then it went black and never turned on again, my phone is dead, it doesnt work at all not connecting it to the computer nor the electricity, i dont know my IMEI number or serial number cuz i cant even turn it on, i dont have the box where it came either, what do i do? i need my phone to work asap. can u help me giving me a call with some instructions? right now i am in Mexico and i will be here for a while so i definitely need my phone working. can u call me please to a local numer. the number is 00529981091605, you can call me anytime, this is urgent.
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No that is not what I am saying you will not lose your applications or internet connections if you trash the preferences that is sound advice you should first try that method.
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Also in this case in the same user's preferences folder there is a file called com.adobe.illustrator.plist trash that as well.
Restaring the computer is a good idea after doing that but not necessary. BTW make certain you first quit Adobe Illustrator before trashing the preferences.
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Using arduino with electrical power suite

I am using an arduino to measure voltage and current and eventually get the power readings . But however when i am getting the readings from the analog input and connect it to my power VI the power factor remains 1or -1 . I am measuring single phace power. I am using an SCT- 013 -000 current transformer for the current . and apower transformer for the voltage 240 - 6V . below is my vi and screenshots . Can you help me troubleshoot why my powerfactor isonly flickering between 1and -1 . for all loads including resistive , capacitive and inductive loads .
Attachments:
Power from Wall Socket.vi ‏45 KB
VI outlook.PNG ‏58 KB

OK. Let's try to define some terms.
Phase resolution: The smallest difference in phase angle between the voltage and current waveforms that can be measured.
Example: At 50 Hz one period is 20 ms. If you take a sample every millisecond (1 kHz), you will get 20 samples per cycle of the 50 Hz signal. That is equvalent to 18 degrees between samples. Since power factor is proprtional to the cosine of the phase difference you would get possible power factor values of 1, 0.95, 0.81, and 0.59 for phase differences of 0, 18, 36, and 54 degrees or time differences of 0, 1, 2, 3, and 4 milliseconds.
If the sampling rate is 120 Hz, the period is 8.333 ms and the phase resolution is 150 degrees. That is meaningless for power factor measurements.
Next, the Arduino LINX software cannot achieve anywhere near 120 Hz as you have the VI set up. Open up the LINX VIs and look at what they are doing. It sends an 8-byte packet to define a channel. Then it waits for 2 bytes to return. One of those bytes tells the next VI how many data bytes are coming. It appears that you get 2 bytes of data from each read. That is a total of 24 bytes for two channels. The digital write also sends 8 bytes although that runs in parallel with the reads. With the standard settings doing two one-channel analog reads takes at least 25 ms. That is equivalent to a sampling rate of 40 Hz. The Nyquist criterion specifies that the sampling rate must be greater than twice the frequency of the signal you want to measure. So your sampling rate needs to be >100 Hz.
If you use the N Channel version of Analog Read for two channels (as opposed to the two separate Reads you have now), it sends a 9-byte packet and receives 6 bytes. The maximum rate it could achieve is ~64 Hz, which is still far too slow.
Lynn

MOVED: [Z77A-GD65]Electric power and current on fan headers

This topic has been moved to Off-Topic Technical.
https://forum-en.msi.com/index.php?topic=158182.0

Hi Froggy,
Thanks for all the suggestions, really appreciate it.
I think I must have been updating my signature when you viewed the post if it wasn't showing up. I am getting by on integrated graphics for the time being so could I OC that a little too? The memory is Samsung Green DDR3 2 x 4GB but I've not re OC'd it yet whilst trying to ensure the CPU OC is stable first.
I found an old screenshot from my OC on BIOS v10.5 where I had the Spread Spectrum disabled so I think that has been the main thing causing instability this time around at achieving 4.4GHz on BIOS v10.6. I've not used the Enhanced Turbo before so am not sure what that does, am coming from a very old non msi motherboard that used an Intel 440GX chipset. Is the Enhanced Turbo the feature that OC's just the one core? I've implemented some of these changes that I've highlighted in green and been running P95 for around 4 hours without any bsod, or threads in error. CPU-Z mainly shows a core voltage of 1.176 or 1.184 and my temps on the hottest cores have maxed at 60c. Will it be possible to go any higher than 4.4 but still retain the power saving of throttling back to 1.6GHz on idle?
Disable EuP 2013
Change Internal PLL to 'Enabled'
Enhanced Turbo to 'Enabled'
Disable 'Spread Spectrum'
Try VDroop at 100%
Digital Comp Level change from 'Auto'
Core Expander change from 'Default'
Leave Core Switch as is
Change I/O to 1.07
SA to 0.970
PLL to 1.82-1.84
PCH 1.055-1.061
C-State either 'Disabled' or if want to keep it, change package limit to 'No Limit'
Long 'D' (W) change to 250
LD Maintain (s) to 60
Short D (W) to 250
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Secondary Turbo (W) to 250
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Electrical power energy auditing

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