Harmonic responsibility quantification method based on harmonic wave analysis integrated equivalent circuit

Abstract

The invention discloses a harmonic responsibility quantification method based on a harmonic analysis integrated equivalent circuit and belongs to the field of a harmonic responsibility quantification technology. Apart from an evaluated user, other parts of a power grid are taken as a system; an attention period of harmonic responsibilities is divided into N analysis periods; obtaining fundamental waves, subharmonic voltages and harmonic current phasors of N+L-1 analysis periods are obtained by acquiring bus voltages and current waveforms at a common connecting point between the system and the evaluated user of the attention period and L-1 analysis periods before the attention period; an equivalent circuit model in which a harmonic voltage source at a system side is connected in series with harmonic impedance and an equivalent circuit model in which a harmonic current source at a user side is connected in parallel with the harmonic impedance under h-time harmonic waves in k-th analysis period are established; an h-th harmonic analysis integrated equivalent circuit in the k-th analysis period is obtained; and when K is greater than and equal to N+L, harmonic responsibility quantification statistical indexes at the system side and the user side in the attention period are obtained. According to the invention, the harmonic responsibilities of the system side and the user side are more clearly defined, and application in engineering practice is facilitated.

Description

technical field [0001] The invention belongs to the technical field of harmonic pollution liability quantification, and in particular relates to a harmonic liability quantification method based on harmonic analysis comprehensive equivalent circuit. Background technique [0002] With the rapid development of power electronic technology, a large number of power electronic devices are widely used in power grids, industries and households, and the problem of harmonic pollution is becoming more and more serious. A large number of nonlinear harmonic source loads inject high-order harmonic currents into the power grid, causing voltage distortion and deteriorating power quality indicators, which have a great impact on the safety and economic operation of the power system. Especially in recent years, users' requirements for power quality have been continuously improved, and harmonic distortion has become one of the prominent problems in many power quality disturbances. [0003] The ...

AI Technical Summary

Problems solved by technology

How to reasonably quantify the responsibility of each party's harmonic pollution has not yet been clearly recognized. Therefore, the present invention proposes a method for quantifying harmonic responsibility based on harmonic analysis and comprehensive equivalent circuits.

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