Fundamental Power Values (1 Cycle) VI

Owning Palette: Power & Energy VIs

Requires: Electrical Power Toolkit

Calculates the fundamental power values from the voltage and current spectra for a single-cycle block.

This VI supports measuring single-line and multiple-line systems.

Note  You must use the D to Y Conversion VI to convert line voltages to phase voltages before performing power measurement. The result of this VI is valid only when the electrical system is balanced.

Details  Examples

	one-cycle fundamental phase voltage vectors specifies one-cycle fundamental vectors of voltage channels. Each array element represents one measurement channel and contains one-cycle fundamental vectors from 10-cycle time interval for a 50 Hz power system or 12-cycle time interval for a 60 Hz power system. Each array element of one-cycle fundamental phase voltage vectors and the corresponding array element of one-cycle fundamental current vectors must be in the same phase of the electrical power system. timestamps specifies timestamp of the end of each signal cycle. vectors specifies the one-cycle fundamental vector value. channel specifies the channel of the fundamental vector.
	one-cycle fundamental current vectors specifies one-cycle fundamental vectors of current channels. Each array element represents one measurement channel and contains one-cycle fundamental vectors from 10-cycle time interval for a 50 Hz power system or 12-cycle time interval for a 60 Hz power system. Each array element of one-cycle fundamental current vectors and the corresponding array element of one-cycle fundamental voltage vectors must be in the same phase of the electrical power system. timestamps specifies timestamp of the end of each signal cycle. vectors specifies the one-cycle fundamental vector value. channel specifies the channel of the fundamental vector.
	system info in specifies the basic configuration of the electrical power system. Use the Initialize System VI to generate the basic configuration information.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	one-cycle fundamental power values returns one-cycle fundamental power values. Each array element represents one measurement channel and contains one-cycle power values from 10-cycle time interval for a 50 Hz power system or 12-cycle time interval for a 60 Hz power system. timestamps returns the timestamp of the end of each signal cycle. apparent power returns fundamental apparent power vectors. active power returns active apparent power vectors. reactive power returns reactive apparent power vectors.
	system info out returns information about the basic configuration of the electrical power system.
	error out contains error information. This output provides standard error out functionality.

Fundamental Power Values (1 Cycle) Details

Related Information
Line and Bus Configurations

Examples

Refer to the following VIs for examples of using the Fundamental Power Values (1 Cycle) VI:

• Power & Energy (DAQmx) VI: labview\examples\Electrical Power\Power Quality\Applications (DAQmx)
• Power & Energy VI: labview\examples\Electrical Power\Power Quality\Applications (cRIO) (Delta-Sigma)
• Power & Energy VI: labview\examples\Electrical Power\Power Quality\Applications (cRIO) (SAR)