## Answers

Jun 28, 2022 - 08:03 PM

Cam you please attached the case? Just the source.

I am using 3 x Single-Phase Voltage Source Model 1 to make an unbalanced 3 phase source. I get an error message: "Impedance[+] is < .000001% of Base Impedance."

- What does this mean?

- Where is the Base Impdence defined?; I have specified the volatage, but not base power, so as far as I can see Zbase is undefined.

- What do I have to chnge?

My paramaters are below. The terms in sqaure brackets are greyed out, so irrelevant.

Thanks, Dave

- What does this mean?

- Where is the Base Impdence defined?; I have specified the volatage, but not base power, so as far as I can see Zbase is undefined.

- What do I have to chnge?

My paramaters are below. The terms in sqaure brackets are greyed out, so irrelevant.

NAME | CAPTION | VALUE | UNIT |

Type | Source Impedance Type: | 2 | |

Ctrl | Source Control: | 2 | |

Vm | Rated Volts (AC:L-G | 76210.2 | Real |

Name | Source Name | Source1 | |

F | Base Frequency | 50.0 | Hz |

Tc | Voltage Input Time Constant | 0.001 | s |

Imp | Impedance Data Format: | RRL values | |

ACDC | Source Type: | AC | |

Exph | External Phase Input Unit | Degrees | |

Term | Specified Parameters | behind the source impedence | |

Es | Initial Source Magnitude (L-G | 132.79056 [kV] | Real |

F0 | Initial Frequency | [60.0] | Hz |

Ph | Initial Phase[ | [0.0] | deg |

Pac | Initial Real Power | [0.0] | MW |

Qac | Initial Reactive Power | [0.0] | MVAR |

Esd | Initial Source Magnitude | [100.0] | kV |

Pdc | Initial Real Power | [0.0] | MW |

R1s | Resistance (series) | [1.0] | ohm |

R1p | Resistance (parallel) | [1.0] | ohm |

L1p | Inductance (parallel) | 100.0 | H |

Z1 | Impedance Magnitude | [1.0] | ohm |

Phi1 | Impedance Phase angle | [80.0] | deg |

RN | Harm. # where phase is same as fundamental | 2.0 | |

Ia | Name for Current [kA] |

Thanks, Dave

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Open Jun 27, 2022 - 04:21 AM

single phase voltage source er

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Jun 28, 2022 - 08:03 PM

Cam you please attached the case? Just the source.

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