Harmonics Control
Select 
Harmonics Options, and click the Control tab to specify various parameters for controlling the behavior of the harmonic analysis routines.
To set harmonics options, from the Harmonics focus, click Harmonics Options. You can also access the options from within the Database Edit focus by selecting Tools > Options > Analysis Options > Harmonics.
Figure 1: Control Tab of the Harmonics Options Dialog Box
| Option | Description |
|---|---|
|
Summation Fundamental V&I |
Selecting Calculated from Power Flow causes the fundamental voltages and currents calculated in the Power Flow to be used for summation calculations. Selecting User Defined enables you to enter a per-unit fundamental voltage and causes the fundamental current to be determined by the Fundamental Amps setting in the Harmonics tab of the equipment dialog boxes. |
|
Harmonic Current Flow |
This field specifies the frequency for Single Point Current Flow or All Source Current Flow calculations. |
|
Summation/All Source Network |
All solutions will use positive sequence unless Pos Seq with Zero seq triplens is selected, in which case the solution for the 3, 6, 9, and so on harmonics use the zero sequence/network. |
|
Scan/Single Point Injection |
Magnitude is defined in either amps or per-unit. The Angle of the current being injected may also be entered. For Network, you can select to have the network solved based on the positive sequence or the zero sequence. |
|
Transformer Branch Side |
For items using a pi-model impedance representation (cable, transmission lines, and transformers), the branch side currents may differ. Select either the From or To, indicating which branch side to use for determining item losses, K-factor and derating. Frequency scans are also affected by this choice, where the current value plotted for a branch is selected here. |
|
Summation Thresholds |
VSUM, VRSS, and K-Factor violations can be highlighted on the one-line using threshold values. |
