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Error 150 | [PSCAD] | Negative SCR or X/R value detected


Relevant software:

PSCAD


Emitted message:

SCR and X/R channels do not support negative values

Description:​

This error is raised by a CONTROL, CH=SCR, AT=, VAL Command in a PSCAD Node. It indicates that a negative value was detected during a Short Circuit Ratio (SCR) or X/R ratio calculation. These values cannot be negative by definition.

danger

This error will stop the PSCAD simulation from launching, as a negative SCR or XR value is not supported.

Possible impact:​

  • The PSCAD simulation will not launch and subsequent tasks will not run.

Potential fixes:​

This error is typically caused by the input data to a calculation.

  • Review input data: Check the data channels being used in the calculation. The data used for SCR or X/R calculation is likely incorrect. If an Internode Variable is being used, check that the Internode Variable is not containing negative values.