Verification of the Effects of the Harmonic Voltages in the Distribution System by Single-Phase SCs for Suppressing Voltage Unbalance
نویسندگان
چکیده
Recently, since single phase loads and dispersed generators become widespread, unbalanced voltage in distribution line become an important problem for voltage management. One of them is that the control of a conventional voltage regulation device become difficult because of the difference of the magnitude of the line voltages, the other one is increase of 3rd harmonic voltages. The authors proposed an unbalanced voltage suppression system using static capacitors (SC system) in the past research. Hence, the effect of 3rd harmonic voltage should be verified under the conditions of harmonic resonance between reactance of line and capacitors. This paper presents analysis of the harmonic voltages in distribution systems with the unbalanced voltages. For the analysis, two distribution system models are configured, which is a model of a residential area and an industrial area. Harmonic voltages are calculated under the condition of SC system and evaluate the harmonic voltage level in the distribution line.
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