Comparison of Voltage-Vector Control based on Duty Cycle Analysis in Three-Phase Four-Leg System Active Filter

Abstract

Comparison of voltage vector control in various forms of tetrahedron that result from switching combination on three-phase four-leg system active filter is presented especially asymmetric tetrahedron shape which is a projection pqr-coordinate into αβ0-coordinate. Parameter tetrahedrons such as modulation boundary-line, reference vector, switching duration time and duty cycle are described. Duty cycle analysis conducted on the Shen’s model, the Zhang’s model, the Perales’s model and asymmetric’s model are presented. The characteristics results showed that switching combination of each IGBT conductor especially its reviews on the neutral wire. Asymmetric tetrahedron can be proposed as control technique in three-phase four-leg system active filter.

Novel asymmetric space vector pulse width modulation for dead-time processing in three-phase power converters

“…An asymmetric voltage vector in a skewed cylindrical shape was projected from the pqr-coordinate to the αβ0-coordinate (Clarke transformation) obtained from the switching combination of voltage vector [15], [16]. Furthermore, three voltage vector combinations in skewed cylindrical shape coordinates were made into twelfth of asymmetrical tetrahedron pairs for modulation control with side lengths of ½ Vdc.…”

“…Duty cycle and switching time were used to the modulation control signal in three-phase power converters. It produced compensation currents that can be used to reduce distortion [15], [16]. Therefore, this research analyzes novel asymmetric SVPWM in αβ0-coordinates, modulation parameters determination, and describes its application to dead-time processing in three-phase power converters.…”

Pengaturan Arus Kompensasi Untuk Pembebanan Nonlinier Pada Sistem Filter Aktif Tiga Fase

“…Superposisi antara arus kompensasi dan arus beban terdistorsi menghasilkan arus sumber sinusoida. Filter aktif sistem tiga fase dapat digunakan untuk mereduksi distorsi (gangguan) dengan mengatur duty cycle dan durasi waktu switching masing-masing lengan agar mempunyai nilai sebesar Vdc [2], [3].…”

Super-capacitor energy storage system to recuperate regenerative braking energy in elevator operation of high buildings

“…Among them, percentage of recovering regenerative braking energy is the highest. This solution group can be divided into two categories: the direct use of regenerative energy by matching time of accelerating and braking elevators by timetable optimization using the optimal control theory so that regenerative braking energy of elevators operating in power generation state transfers to elevators operating Int J Elec & Comp Eng ISSN: 2088-8708  Super-capacitor energy storage system to recuperate regenerative … (An Thi Hoai Thu Anh) 1359 in motoring state [10], [11], and the indirect use of regenerative energy by applying energy storage devices recovering braking energy when elevators operate in no-load lifting, and full-load lowering [12]- [17], or active rectifiers, reversible rectifiers in order to back the braking energy to the grid source [18]- [20]. This paper proposes the method for recovering regenerative braking energy by the super-capacitor energy storage system (SCESS) with the saving energy percentage indicated in the simulation results on MATLAB of the building ten floor being up to 30%.…”

“…𝑇 𝑖𝑢 . 𝑠 + 𝑘 1(20) Finding values of 𝑘 𝑝𝑢 , 𝑘 𝑖𝑢 by using symmetry optimal method, 𝐺 𝑘𝑢 (𝑠) = 𝑘 1 . 𝑇 𝑖𝑢 .…”