A filter is a passive tuned circuit that presents a low impedance “sink” to currents at a given frequency or frequencies. Filter on the equipment palette toolbar inserts a filter in the one-line diagram. The application of harmonic filters can cause the creation of parallel resonance below the filter tuning point (single tuned notch). The filter must be designed to minimize the impact of this resonant point.
This dialog box includes the following areas and tabs:
Figure 1: Filter Data Dialog Box
Option | Description |
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ID Name | Uniquely identifies the filter. This ID name can be up to 16 characters long. The names default to FL-1, FL-2, FL-3... as you enter new filters on the one-line, but these names can be changed to be more descriptive if needed. |
To Bus | The bus to which the filter connects, which must already exist on the one-line. For your reference, the To Bus base kV is displayed next to the bus name. |
Use the Harmonics tab to indicate whether this equipment item is introducing harmonics into your power system.
Figure 3: Harmonics Tab
Option | Description | |||||||||||||||||||||
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Resistance Factor |
EasyPower offers two methods for calculating RH:
RH = RFund * H R-EXP RH = RFund * (1+ECF*H2)/(1+ECF) EasyPower defaults all skin effect correction to R-EXP and a value of 0.5.
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Fundamental Amps |
Use to set the fundamental amps. The options are as follows:
To use fundamental current calculated by power flow, select Calculated from Power Flow in the Summation Fundamental Voltage area of the Harmonics Options > Control dialog box. |
See Location for more information.
This tab is read-only and appears only if you have imported data from an SKM Data Format file. See Importing an SKM Format File for more information.
See Comments for information.
See Hyperlinks for information.
Database Technical Reference |