high voltage measurement for reactive power compensation

[vikas.singh]

hi,
    i am working for reactive power compensation through voltage stability. i have done with the end control work but facing problem to measure the voltage which in necessary for software computation. using CVT (capacitive voltage transformer) i can down the voltage up to 50 V, now i want the acquisition of this voltage data to LabVIEW. what i have to do?? what are the DAQ hardware that going to use?

[Ana P]

Hi vikas.singh,

Do you want to measure 50 V DC or AC? If it is 50 V DC and the signal range is within 10 V I would recommend looking for the Industrial M series cards. However if you are trying to measure 50 V AC the Industrial M series cards won't serve that purpose, so I recommend using one of the DMM modules that can handle up to 300 V. I hope this is helpful,

[vikas.singh]

Thank you for the reply Ana. i have worked out for the code on LabVIEW, i require to find out the AC bus voltage of the range of 40 V to 55 V and then this  data i have to use in my code. like if the bus Voltage is 48 V at any time then the appropriate module should  send 48 V to the LabVIEW code (PC) because further using the data i am sending digital codes derived from the code through cRIO to another experiment location.

[Ana P]

Hi

From your last post I understand that you want to measure 50 V AC, and your signal will be varying between 40 V and 55 V. You also have a cRIO system set up that you will send data to depending on the readings of the AC signal. You can develop a code in LabVIEW that will continuously read the Analog Input and then you can use those values in the other part of your application. As I said before, have a look at the DMM modules, because they support your signal range. However, another option would be to lower the voltage of your AC signal in a range handled by one of the DAQ cards, generally -10V to 10 V.