Power Values Period 3Ph

The Power Values Period module calculates the power values of the connected loads. These include the fundamental components and the phase shift angle. For this purpose, only the first harmonics of the input signal are used for the calculation in addition to the signal curve in the time range. The advantage of these algorithms is the high dynamics of the calculations. The results refer to a configurable number of signal periods. The period duration refers to the frequency specified at the input at the start of the period. The statistical results refer to the entire runtime or the time at which the statistical results were last reset.

In the Beckhoff Information System you will find the documentation of the corresponding PLC function block FB_PMA_PowerValues_Period_3Ph.

In the Beckhoff Information System you will find the documentation of the TF3650 TwinCAT 3 Power Monitoring function with descriptions of the corresponding PLC library.

Configuration parameters

Buffer Length: Length of the input buffer.

Sample Rate [Hz]: Sample rate (samples per second) of the input signal.

Min Input Current [A]: Minimum input value (RMS) of the current. This parameter prevents the calculation of input values that are too small.

Periods: Number of periods that influence the calculation. (Period length = sample rate/frequency).

Input values

Frequency: Current frequency of the input signal. Is used to determine the length of the period at the beginning of a period. The output of the Frequency Period1 Ch module can be used.
Input Voltage 1 .. Input Voltage 3: Input values of the voltage.
Input Current 1 .. Input Current 3: Input values of the current.
Reset Statistics (optional): TRUE resets the min. and max. values of the outputs.

Output values

Apparent Power: Total apparent power.
Apparent Power 1: Fundamental apparent power.
Active Power: Active power.
Reactive Power d: Distortion reactive power.
Reactive Power 1: Fundamental shift reactive power.
Total Reactive Power: Total reactive power.
Phi: Phase shift angle.
Cos Phi: CosPhi (active power/fundamental apparent power).
Power Factor: Power factor (active power/total apparent power).
Power Quality Factor: Represents the quality of the power supply simplified in a value range between 0 and 1. The frequency, the RMS value of the voltage and the THD of the voltage are also included.
Energy Pos: Energy in positive direction.
Energy Neg: Energy in the negative direction.
Energy Res: Resulting energy.

Sum Apparent Power: Sum of the total apparent power of all phases.
Sum Active Power: Sum of the active power of all phases.
Sum Total Reactive Power: Sum of the total reactive power of all phases.
Sum Reactive Power 1 Res: Sum of the values of the fundamental shift reactive power of all phases.