Impedance element evaluations using automatic testing modes
In addition to the base functionality of Distance, Advanced Distance provides the following advanced functionality:
- Search and Check tests of the zone reaches
- Test settings relative to zone reaches and line angle (“relative shots“)
- Constant source impedance test model
- Load current superimposition
Shot test, Search test, and Check test
In a Shot test, single test points are added to a test point table and are automatically processed.
Relative test definitions
A powerful feature is the possibility to make test point definitions relative to the nominal characteristic of the distance relay (e.g. 90 % of zone 1, 110 % of zone 1, 90 % of zone 2,…).
Constant source impedance model
Besides the constant test current and constant test voltage models, Advanced Distance provides the constant source impedance test model which is useful in special cases where parameters such as SIR (Source Impedance Ratio) are important.
To verify special behavior of certain relays which occurs only when a pre-fault (load) current is present (e.g. accelerated tripping performance), a load current can be superimposed.
Testing multiple fault loops in one test module
Advanced Distance provides special support by performing the tests for multiple fault loops (L-N, L-L and L-L-L) within one test module. For all test modes (Shot, Search, Check) multiple tabs are provided with a separate test point table for every fault type.
Test settings can either be entered fault-loop-specific or defined simultaneously for multiple fault types.
Distance Characteristic Guesser
If the nominal characteristic of a relay should be unknown or the actual characteristic shape is to be documented, a guesser function allows the automatic generation of an approximated characteristic based on the results of a Search and/or Shot test.
Multi-windows user interface
The user interface can be configured individually, using the following elements:
- Test View
- Z/t Diagram
- Phasor diagram
- Time Signal View