### Abstract

A method is presented for the calculation of bus voltage transients in an electric power system. The method is specifically intended for application to distribution and subtransmission networks during the application of large industrial loads. In this sense, the calculation is a power quality assessment. In particular, the case of load currents that are electronically switched may be analyzed. The essence of the method is the Fourier transform of Ohm's law. The fast Fourier transform is used for computational efficiency. An interesting method for obtaining the Fourier transform of the bus transfer impedance is developed from the theory of parallel n-port networks. Examples are used to illustrate the calculation of bus voltage transients harmonic content. Although the latter is not a transient, harmonic voltages may be calculated by the proposed method under certain circumstances. The main application illustrated is that a transient which has dynamics which occur in a time interval of similar order as the period of the power frequency (i.e., 1/60 s for a 60-Hz system).

Original language | English (US) |
---|---|

Pages (from-to) | 1869-1875 |

Number of pages | 7 |

Journal | IEEE Transactions on Power Delivery |

Volume | 4 |

Issue number | 3 |

DOIs | |

State | Published - Jul 1989 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Electrical and Electronic Engineering

### Cite this

**New method for the calculation of subtransmission and distribution system transients based on the FFT.** / Heydt, Gerald T.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - New method for the calculation of subtransmission and distribution system transients based on the FFT

AU - Heydt, Gerald T.

PY - 1989/7

Y1 - 1989/7

N2 - A method is presented for the calculation of bus voltage transients in an electric power system. The method is specifically intended for application to distribution and subtransmission networks during the application of large industrial loads. In this sense, the calculation is a power quality assessment. In particular, the case of load currents that are electronically switched may be analyzed. The essence of the method is the Fourier transform of Ohm's law. The fast Fourier transform is used for computational efficiency. An interesting method for obtaining the Fourier transform of the bus transfer impedance is developed from the theory of parallel n-port networks. Examples are used to illustrate the calculation of bus voltage transients harmonic content. Although the latter is not a transient, harmonic voltages may be calculated by the proposed method under certain circumstances. The main application illustrated is that a transient which has dynamics which occur in a time interval of similar order as the period of the power frequency (i.e., 1/60 s for a 60-Hz system).

AB - A method is presented for the calculation of bus voltage transients in an electric power system. The method is specifically intended for application to distribution and subtransmission networks during the application of large industrial loads. In this sense, the calculation is a power quality assessment. In particular, the case of load currents that are electronically switched may be analyzed. The essence of the method is the Fourier transform of Ohm's law. The fast Fourier transform is used for computational efficiency. An interesting method for obtaining the Fourier transform of the bus transfer impedance is developed from the theory of parallel n-port networks. Examples are used to illustrate the calculation of bus voltage transients harmonic content. Although the latter is not a transient, harmonic voltages may be calculated by the proposed method under certain circumstances. The main application illustrated is that a transient which has dynamics which occur in a time interval of similar order as the period of the power frequency (i.e., 1/60 s for a 60-Hz system).

UR - http://www.scopus.com/inward/record.url?scp=0024703020&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024703020&partnerID=8YFLogxK

U2 - 10.1109/61.32684

DO - 10.1109/61.32684

M3 - Article

AN - SCOPUS:0024703020

VL - 4

SP - 1869

EP - 1875

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 3

ER -