Backward/Forward sweep-based harmonic analysis method for distribution systems

doi:10.1109/TPWRD.2007.899523

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Backward/Forward sweep-based harmonic analysis method for distribution systems

2007-07-01

115

PRE

Jen‐Hao Teng *

Chuo-Yean Chang

DOI：10.1109/TPWRD.2007.899523

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Abstract

En 中文

A fast harmonic analysis method designed for three-phase radial distribution systems is proposed in this paper. The proposed method is developed based on the exact three-phase component models, frequency-scan formulation, and a commonly used forward/backward sweep technique. The backward sweep is used to build the relationship between branch currents and bus current injections of a distribution system, and then the forward sweep can use the aforementioned relationship to calculate bus voltages. The forward/backward sweep technique is a powerful method and has been widely used in distribution system analysis; however, it cannot be used for harmonic analysis directly. Therefore, the proposed method designs some specific data formats, integrates them into the commonly used forward/backward sweep technique, and derives useful formulas to calculate the effects of system status induced by harmonic pollution. The proposed method is more efficient than the conventional harmonic analysis algorithms since the time-consuming procedure of the admittance matrix inverse is not necessary in the solution procedure. Test results demonstrate the accuracy and efficiency of the proposed method.

Keywords:

distribution automation (DA)

forward/backward sweep

harmonic analysis method

total harmonic distortion (THD)

unbalanced three-phase system

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