electricpy.fault.distmeasz

electricpy.fault.distmeasz(VLNmeas, If, Ip, Ipp, CTR=1, VTR=1, k0=None, z1=None, z0=None, linelength=1)[source]

Distance Element Measured Impedance Function.

Function to evaluate the Relay-Measured-Impedance as calculated from the measured voltage, current, and line parameters.

Parameters:

  • VLNmeas (complex) – Measured Line-to-Neutral voltage for the faulted phase in primary volts.

  • If (complex) – Faulted phase current measured in primary amps.

  • Ip (complex) – Secondary phase current measured in primary amps.

  • Ipp (complex) – Terchiary phase current measured in primary amps.

  • CTR (float, optional) – Current transformer ratio, default=1

  • VTR (float, optional) – Voltage transformer ratio, default=1

  • k0 (complex, optional) – Residual Compensation Factor

  • z1 (complex, optional) – The positive-sequence impedance characteristic of the line, specified in ohms-per-unit where the total line length (of same unit) is specified in linelength argument.

  • z0 (complex, optional) – The zero-sequence impedance characteristic of the line, specified in ohms-per-unit where the total line length (of same unit) is specified in linelength argument.

  • linelength (float, optional) – The length (in same base unit as impedance characteristics) of the line. default=1

Returns:

Zmeas – The “measured” impedance as calculated by the relay.

Return type:

complex