Abstract
In this paper hybrid power quality conditioner for three-phase four wire power systems is considered. The conditioner is composed of single modules installed at various locations of distribution power system. Individual modules ensure compensation of zero-sequence and negative- sequence voltage and current components. This open configuration of power quality conditioner composed of independent modules allows compensation voltage and current distortion caused by nonlinear and unbalanced single-phase loads. The performance of the proposed conditioner is validated through computer simulation using MatLab software. Simulation results show that the proposed conditioner achieves PQ normalization
Highlights
The issue of ensuring the power quality (PQ) in 3-phase 4-wire systems has become important in recent years
A more economical version of unified power quality conditioner (UPQC) for 3-phase 4wire systems is proposed in the article [7]
The article considers a HQPC for 3-phase 4-wire systems that provides compensation for current and voltage distortions caused by the nonlinear nature and asymmetry of single-phase loads
Summary
The issue of ensuring the power quality (PQ) in 3-phase 4-wire systems has become important in recent years. The widespread use of nonlinear single-phase loads has led to the fact that the asymmetry and non-sinusoidal nature of currents and voltages in 3-phase 4-wire systems have become permanent factors that reduce the efficiency of power supply systems [1, 2] It should be taken into account that many consumers in such systems have increased requirements for power quality [3, 4]. A more economical version of UPQC for 3-phase 4wire systems is proposed in the article [7] It consists of two parallel hybrid filters that provide separate compensation for the symmetric components of the negative and zero sequence. Power quality conditioners, considered in [7 – 9], allow to solve the problems caused by harmonic distortion and unbalanced (asymmetric) load These devices are designed to regulate PQ in network nodes that are connected to a concentrated non-linear load. A model in the MatLab (Simulink) environment was developed to study the characteristics of HPQC
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