Apparatus and method for determining the effects of harmonics on

Details Apparatus and method for determining the effects of harmonics on Apparatus and method for determining the effects of harmonics on

1993-12-09

1996-07-23

Ramirez, Ellis B.

Boots, shoes, and leggings

364492, 364484, 324623, G01R 1906

Patent

active

055396518

ABSTRACT:
The present invention relates to a system and method for determining the effects of linear and nonlinear loads on electrical power systems. The invention utilizes stored load characteristic data in terms of current spectra at predefined voltage values and network impedances to determine the voltage drop between an electrical substation bus and an electrical load bus. The actual load voltage is determined by an iteration technique which takes the difference between a collected substation voltage and the voltage drop and compares the result of the difference to an estimated load voltage. For each iteration the estimated load voltage is re-estimated until the difference result equals the estimated voltage, thereby determining the actual load voltage. Knowing the actual load voltage, permits determination of actual current and power values which are compared to collected substation current and power values. If the values are equal, the effects of the harmonics are known. If the values are not equal, load composition data is adjusted and the system repeats the above until the values are equal.

REFERENCES:
patent: 3903399 (1975-09-01), Enns et al.
patent: 4661769 (1987-04-01), Girgis
patent: 4818947 (1989-04-01), Zucker et al.
patent: 4871971 (1989-10-01), Jeerings et al.
patent: 5072187 (1991-12-01), Shilo
patent: 5179376 (1993-01-01), Pomatte
patent: 5298888 (1994-03-01), McEachern et al.
patent: 5301121 (1994-04-01), Garverick et al.
patent: 5334877 (1994-08-01), Mohan et al.
patent: 5343079 (1994-08-01), Mohan et al.
patent: 5347464 (1994-09-01), McEachem et al.
Sharma et al., "An Iterative Approach for Analysis of Harmonic Penetration in the Power Transmission Networks", Oct. 1991.
Williams et al., "Harmonic Propagation on an Electric Distribution System: Field Measurements Compared with Computer Simulation", Apr. 1993.
Williamson et al., "Harmonic Analysis of Spacecraft Power Systems Using a Personal Computer", 1989.
Valcareel et al., "Harmonic Power Flow for Unbalanced Systems", Oct. 1993.
Fleming et al., "Harmonic Analysis of a Reduced SaskPower Transmission Network Using an Iterative Approach", 1991.
Caramia et al., "Probabilistic Iterative Harmonic Analysis of Power Systems", Jul. 1994.
Grebe et al., "Software Analyzer Harmonics", Aug. 1993.
Mathews, Numerical Method, p. 116, 1992.

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