Harmonic blocking at source transformer

Details Harmonic blocking at source transformer Harmonic blocking at source transformer

1997-07-14

1998-09-29

Elms, Richard T.

Electrical transmission or interconnection systems

With harmonic filter or neutralizer

333177, H02J 301

Patent

active

058149015

ABSTRACT:
Apparatus and method to separate the harmonic problems in the load side circuit of an electrical power distribution system from the source side circuit of a source transformer in a reliable and economical manner. The electrical power distribution system includes at least a source of AC electrical power, a load, and the connection from the source to the load including a source transformer, electrical conductors, wires, or cables. A part of the load is the non-linear load which injects harmonics. A harmonic blocking filter, comprised of an existing source transformer and a series combination of an auxiliary transformer and a capacitor, is connected in parallel with the source transformer. The MVA rating of the auxiliary transformer is chosen to be equal or smaller than the MVA rating of the source transformer, and the leakage impedance of the auxiliary transformer is chosen to be equal or larger than the impedance of the source transformer.

REFERENCES:
patent: 4308575 (1981-12-01), Mase

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