electricpy.fault.correctedcurrents

electricpy.fault.correctedcurrents(Ipri, TAP, correction='Y', CTR=1)[source]

Electrical Transformer Current Correction Function.

Function to evaluate the currents as corrected for microprocessor- based relay protection schemes.

Parameters:

  • Ipri (list of complex) – Three-phase set (IA, IB, IC) of primary currents.

  • TAP (float) – Relay’s TAP setting.

  • correction (string, optional) – String defining correction factor, may be one of: (Y, D+, D-, Z); Y denotes Y (Y0) connection, D+ denotes Dab (D1) connection, D- denotes Dac (D11) connection, and Z (Z12) denotes zero-sequence removal. default=”Y”

  • CTR (float) – Current Transformer Ratio, default=1

Returns:

Isec_corr – The corrected currents to perform operate/restraint calculations with.

Return type:

list of complex