A method of approximate steady-state analysis for non-linear networks

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Abstract
The paper describes a method whereby the fundamental and third-harmonic quantities in the steady-state solution of a network containing certain non-linear elements may be obtained approximately.The method consists of three stages:(a) A first approximation to the fundamental-frequency solution, usually accurate to within 10%.(b) A third-harmonic solution (generally within 15%) using an equivalent circuit which is dependent on the first fundamental solution.(c) A correction to the fundamental solution, using third-harmonic quantities, which brings its accuracy to within about 3%.Adaptations of some standard techniques of solving linear steady-state problems for use with this method of analysis are described.

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