Single-Phase Fault

This component simulates a single-phase fault operation, which can be a single-phase-to-ground or a line-to-line fault.

The Single-Phase Fault is controlled through a named input signal (default is Fault), where the fault logic is:

The fault control signal can be configured automatically by using the Timed Fault Logic component, or the Sequencer components. The fault may also be controlled manually through the use of on-line controls, or through a more elaborate control scheme.

Input Parameters

Fault Name	INTEGER	Variable	Enter a name for the fault input control signal

Clearing Possible at Any Current?	Choice		Select Yes or No. If No is selected, the fault will wait for the next current zero following the clear signal, before clearing the fault

Current Chopping Limit	REAL	Constant	If Clearing Possible at Any Current? \| No is selected, the fault will not clear until the absolute value of the fault current is less than this limit [kA].

Fault ON Resistance

REAL

Variable

Enter a small value to represent the branch resistance during a faulted state. This value is usually in the order of 0.01 (default), and is internally limited so that it is always less than 1% of the Fault OFF Resistance [W].

NOTE: Although this parameter is configured to take a variable signal, it cannot be changed dynamically. The value of the signal at first time step is taken as the ON resistance, independent of the project startup method (i.e. from Data File or Snapshot File). This allows the ability to change the ON resistance when the project is started from a snapshot, without invalidating the snapshot file.

NOTE: If this value is less than the ideal branch threshold, the fault will be modeled as an ideal branch while in the faulted state.

Fault OFF Resistance

REAL

Constant

Enter a large value to represent the cleared state of the fault. This should be in the order of 1.0 x 106 (default) [W]

Single Phase Fault

Description

Input Parameters