Three-phase Four-leg Inverter LC Filter Using FCS MPC

Andang, Asep; Pamungkas, Trio Adi; Busaeri, Nundang; Hartati, Rukmi Sari; Manuaba, Ida Bagus Gede; Kumara, I Nyoman Satya

doi:10.1109/icsgteis53426.2021.9650376

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…In order to stop the propagation of harmonic currents created by four leg inverter connected to balanced load, an LC filter is used. It is a series resonant circuit tuned to the frequency of the harmonics and mounted as a shunt across the terminals of the AC terminals voltage, [34]. This filtering system behaves like a reactive power compensator.…”

Section: Design Of the Input Filtermentioning

confidence: 99%

Four-Leg Inverter Based on Three-Dimensional Space Vector Modulation Method for Desired Output Frequency

2024

Teh. vjesn.

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Conventional six-switch inverters, designed for balanced three-phase systems, face challenges in low-voltage networks with mixed single-phase and three-phase loads, leading to voltage imbalances. This imbalance adversely affects equipment, especially protection devices and power electronic converters. The increasing use of power electronic devices in industries with nonlinear loads has driven the adoption of four-leg inverters to handle neutral currents during unbalanced load connections in three-phase networks. This shift introduces challenges in pulse width modulation, particularly in the application of Space Vector Modulation (SVM). This work proposes a novel control strategy using a direct 3D-SVM approach, effectively determining switch states for voltage capacitor balancing and precise output current control. The study's main focus is presenting an advanced control strategy for a four-leg inverter utilizing the 3D-SVM technique to operate efficiently under highly unbalanced loads in distribution networks. The goal is to achieve balanced output voltages and currents under varying load conditions while maintaining the desired variable output frequency. Simulation results validate the proposed control strategy, showing a Total Harmonic Distortion (THD) of output current is 2.06% at 50 Hz and 2.55% at 25 Hz under balanced load, same thing in second case under unbalanced load, the THD is 1.65% at 50 Hz and 2.10% at 25 Hz. with similar under nonlinear load, the THD is 1.94% at 50 Hz and 2.46% at 25 Hz. Importantly, all outcomes fall within IEEE Standard 519-1992 for harmonic limits, highlighting the robustness and reliability of the proposed control approach.

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Section: Design Of the Input Filtermentioning

confidence: 99%

Four-Leg Inverter Based on Three-Dimensional Space Vector Modulation Method for Desired Output Frequency

2024

Teh. vjesn.

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“…(1-4) respectively. The filter plays a vital role in smoothing the current and voltage waveforms [26]. The utilization of non-linear loads such as laptops, printers, desktops, servers, inverters, matrix converters, etc., is increasing day by day, which results in non-sinusoidal voltage and current waveforms at the output of load [14].…”

Section: B Non-linear Loadsmentioning

confidence: 99%

Design of LC Filter with Shunt Damping Resistor for Non-linear Load to Reduce the Total Harmonic Distortion in Load Voltage

Soomro,

Iqrar Ahmed Khoso,

Naseeb Ullah Sawand

et al. 2024

SSURJET

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The electrical power distribution system is the part of a power system, which supplies electrical power to consumers for utilization. Recently the utilization of nonlinear loads has been increasing in distribution system which badly affected the sinusoidal output voltage waveform. Every consumer of electricity demand consistent and sinusoidal voltage waveform to run their loads properly but due to power quality issues such as harmonics, voltage sag, voltage swell, flickering, and interruption of power supply which badly affect the output voltage of the loads may result in equipment damages, and financial loss. This research study discusses the voltage harmonic which is one of the power quality problems. The harmonic is a Non sinusoidal waveform that is generated due to the applications of nonlinear loads which affect the power system reliability, increase the transformer losses, line losses, and frequent faults are generated which results in poor utility revenue, and reduction in production in industries. So, in this research study, the LC filter with a damping resistor is designed to improve the output voltage waveform. The MATLAB simulation model is developed to analyze the performance of the distribution system under linear and nonlinear loads with and without an LC filter circuit and also THD% is analyzed through FFT.

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Model Predictive Control for Three-Phase, Four-Leg Dynamic Voltage Restorer

Liu,

Zhang,

Liang

et al. 2024

Energies

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Dynamic voltage restores (DVRs) are usually used to mitigate the effect of voltage sag and guarantee sufficient power supply for sensitive loads. However, three-phase voltage cannot be compensated to the desired balance voltage under unbalanced three-phase loads by traditional DVRs with a three-phase, three-leg inverter. To address this problem, a three-phase, four-leg inverter-based DVR is first introduced in this paper, and then the state space model in its continuous form and discrete form are established, respectively. A two-step predictive method is proposed for the prediction of the output voltage in each switching state by the established voltage prediction model. Finite-control-set model predictive control (MPC) is developed to be used in the three-phase, four-leg inverter-based DVR. Its dynamic response is effectively improved by the proposed MPC method under various voltage sag conditions. The proposed DVR control strategy is validated via MATLAB/Simulink-R2022b simulations, which demonstrate its effectiveness in voltage compensation under various sag conditions.

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Three-phase Four-leg Inverter LC Filter Using FCS MPC

Cited by 3 publications

References 24 publications

Four-Leg Inverter Based on Three-Dimensional Space Vector Modulation Method for Desired Output Frequency

Four-Leg Inverter Based on Three-Dimensional Space Vector Modulation Method for Desired Output Frequency

Design of LC Filter with Shunt Damping Resistor for Non-linear Load to Reduce the Total Harmonic Distortion in Load Voltage

Model Predictive Control for Three-Phase, Four-Leg Dynamic Voltage Restorer

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