scholarly journals Integrated compensation model using a three-phase neutral point clamped inverter

2020 ◽  
Vol 10 (5) ◽  
pp. 5074
Author(s):  
Chau Minh Thuyen ◽  
Nguyen Hoai Thuong ◽  
Truong Khac Tung
Keyword(s):  
Supply Voltage ◽  
Neutral Point ◽  
Phase Voltage ◽  
Nonlinear Load ◽  
Compensation Model ◽  
Three Phase ◽  
Different Types ◽  
Source Voltage ◽  
Simulation Results ◽  
Bus Voltage

Normally, when research on active compensation models, previous studies only assumed that the source of harmonics is nonlinear load. The nonlinear load here is fixed and balanced, the supply voltage is considered ideal, i.e. the three-phase source is balanced and there is no distortion. However, in reality, the above assumption is difficult to achieve. Therefore, this paper aims to design an integrated compensation model for different types of harmonic sources. The types of harmonic sources considered here include: harmonic sources generated from nonlinear load and source. The requirement of the integrated compensation model is to create a balanced three-phase voltage at the terminal of the load and the supply current must be a sinusoidal wave in phase with the source voltage. In order to reduce the loss caused by the inverter switching, this paper uses a three-level Neutral Point Clamped inverter. The simulation results performed on Psim software have demonstrated the effectiveness of the proposed integrated compensation model compared to the traditional integrated compensation model in reducing harmonics and stabilizing DC-bus voltage.

Development of Computational Technique for Better Utilization of Renewable Energy

2013 ◽  
Vol 768 ◽  
pp. 98-102
Author(s):  
R. Princelyn Jeba Kiruba ◽  
R. Arulmozhiyal
Keyword(s):  
Sliding Mode ◽  
Computational Technique ◽  
Sliding Mode Controller ◽  
Phase Voltage ◽  
High Quality ◽  
Second Stage ◽  
Three Phase ◽  
Fuzzy Sliding Mode ◽  
Source Voltage ◽  
Simulation Results

The project illustrates an idea of connecting the photovoltaic systems with the Grid, GCPS. In this work, the photovoltaic source of generation, the PVG is connected to the main electric grid via two static electronic stages. The first stage contains a buck-boost dc-dc converter, insuring impedance adaptation between PVG and grid. This converter is controlled by the Fuzzy Sliding Mode controller, FSMC. The controller is used to track the dc reference voltage which is used to satisfy the main grid. The second stage is composed of a dc bus and a three-phase voltage inverter, which serves as an interface to the PVG and the grid utility. The inverter output is regulated by means of suitable filters to inject the high quality Photovoltaic, PV power into the grid. The GCPS has been implemented in the MATLAB. The performances of the fuzzy sliding controller are compared to the results obtained by a sliding mode controller. The satisfactory simulation results, reduces the phenomenon of chattering. The resulting waveforms indicate the robustness of control against variation of the load and the source voltage of the converter.

Lissajous Curve of an Auxiliary Winding Voltage Park Components for Diagnosing Multiple Open Switches Faults in Three Phase Inverter

2014 ◽  
Vol 672-674 ◽  
pp. 1224-1233 ◽  
Author(s):  
Lamiaâ El Menzhi ◽  
Abdallah Saad
Keyword(s):  
Induction Motor ◽  
New Technique ◽  
Phase Voltage ◽  
Phase Inverter ◽  
Voltage Inverter ◽  
Three Phase ◽  
Open Switch ◽  
Simulation Results ◽  
A New Technique ◽  
Three Phase Inverter

In this paper, a new technique for diagnosing multiple open switch fault in three phase voltage inverter feeding induction motor is presented. It is based on the so-called the Lissajous curve of an auxiliary winding voltage Park components. For this purpose, expressions of the inserted winding voltage and its Park components are presented. Simulation results curried out for non defected and defected inverter show the effectiveness of the proposed method.

LADRC Control for the Three-Phase Voltage-Type PWM Rectifier

2012 ◽  
Vol 591-593 ◽  
pp. 1531-1534 ◽  
Author(s):  
Jin Fang Zhang ◽  
En Li Yao ◽  
Jin Chao Xing
Keyword(s):  
Control Method ◽  
External Disturbance ◽  
Processing System ◽  
Normal Operation ◽  
Equivalent Resistance ◽  
Phase Voltage ◽  
Pwm Inverter ◽  
Three Phase ◽  
Dc Bus ◽  
Bus Voltage

In the three-phase voltage-type pulse width modulation (PWM) inverter system, the steady DC-bus voltage is significant for normal operation of PWM converter. With traditional control method, DC-bus voltage has poor anti-disturbance performance and large steady-state error generated by parametric uncertainties of inductive resistance and switching devices’ equivalent resistance. To cope with these problems, a linear active disturbance rejection control (LADRC) controller is designed based on the advantages of the LADRC in processing system internal perturbation and external disturbance. The simulation study shows that under the same disturbance the proposed method can realize not only faster dynamic response and better property of anti-disturbance performance, but also unity power factor control. For the uncertainties of AC equivalent resistance and inductance, the method shows strong adaptability and robustness.

scholarly journals Modeling and reliability analysis of three phase z-source AC-AC converter

2017 ◽  
Vol 66 (4) ◽  
pp. 731-743
Author(s):  
Hanuman Prasad ◽  
Tanmoy Maity
Keyword(s):  
Reliability Analysis ◽  
Output Voltage ◽  
Closed Loop ◽  
Supply Voltage ◽  
Loop System ◽  
Small Signal ◽  
Closed Loop System ◽  
Voltage Variation ◽  
Three Phase ◽  
Simulation Results

Abstract This paper presents the small signal modeling using the state space averaging technique and reliability analysis of a three-phase z-source ac-ac converter. By controlling the shoot-through duty ratio, it can operate in buck-boost mode and maintain desired output voltage during voltage sag and surge condition. It has faster dynamic response and higher efficiency as compared to the traditional voltage regulator. Small signal analysis derives different control transfer functions and this leads to design a suitable controller for a closed loop system during supply voltage variation. The closed loop system of the converter with a PID controller eliminates the transients in output voltage and provides steady state regulated output. The proposed model designed in the RT-LAB and executed in a field programming gate array (FPGA)-based real-time digital simulator at a fixedtime step of 10 μs and a constant switching frequency of 10 kHz. The simulator was developed using very high speed integrated circuit hardware description language (VHDL), making it versatile and moveable. Hardware-in-the-loop (HIL) simulation results are presented to justify the MATLAB simulation results during supply voltage variation of the three phase z-source ac-ac converter. The reliability analysis has been applied to the converter to find out the failure rate of its different components.

scholarly journals Vector Weighting Approach and Vector Space Decoupling Transform in a Novel SVPWM Algorithm for Six-Phase Voltage Source Inverter

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Peng Wu ◽  
Lei Yuan ◽  
Zhen Zuo ◽  
Junyu Wei
Keyword(s):  
Vector Space ◽  
Pulse Width Modulation ◽  
Permanent Magnet Synchronous Motor ◽  
Voltage Source ◽  
Phase Voltage ◽  
Three Phase ◽  
Action Time ◽  
Previous Algorithm ◽  
Bus Voltage ◽  
Smooth Transitions

For six-phase permanent-magnet synchronous motor (PMSM) which has two sets of Y-connected three-phase windings spatially phase shifted by 30 electrical degrees, to increase the utilization ratio of the DC bus voltage, a novel space vector pulse width modulation (SVPWM) algorithm in full modulation range capability based on vector weighted method is proposed in this paper. The basic vector action time of SVPWM method is derived in detail, employing vector space decomposition transformation approach. Compared with the previous algorithm, this strategy is able to overcome the inherent shortcomings of the four-vector SVPWM, and it achieves smooth transitions from linear to overmodulation region. Simulation and experimental analyses demonstrate the effectiveness and feasibility of the proposed strategy.

Study on the Characteristic of Sensitive Load under Voltage Sags

2013 ◽  
Vol 418 ◽  
pp. 269-272
Author(s):  
Rong Hui Liu ◽  
Ai Qang Pan ◽  
Hai Bo Wang ◽  
Xiu Yang
Keyword(s):  
Power Supply ◽  
Single Phase ◽  
Voltage Sensitivity ◽  
Voltage Sags ◽  
Phase Voltage ◽  
Three Phase ◽  
Simulation Results

In this paper, the characteristics of AC/DC converter under single-phase voltage sags and three-phase voltage sags are simulated with Matlab emulator. The simulation results show that effects on rectifier equipment under three-phase voltage sags are more serious than those under single-phase voltage sags. The flat wave capacitance plays an important role in voltage sensitivity of sensitive loads. In practice, the capacitance of flat wave capacitor is chosen according to the power supply and load requirements so as to realize the best balance of performance and price.

scholarly journals a Three Phase Voltage Source Neutral-Point-Clamped Converter with Divided Capacitors.

1997 ◽  
Vol 117 (2) ◽  
pp. 196-203
Author(s):  
Noriaki Kamigaito ◽  
Yasumasa Kubota ◽  
Shigeo Masukawa ◽  
Shoji Iida
Keyword(s):  
Neutral Point ◽  
Voltage Source ◽  
Phase Voltage ◽  
Three Phase ◽  
Clamped Converter

A three-phase voltage-source neutral-point-clamped converter with divided capacitors

1997 ◽  
Vol 121 (2) ◽  
pp. 72-82
Author(s):  
Noriaki Kamigaito ◽  
Yasumasa Kubota ◽  
Shigeo Masukawa ◽  
Shoji Iida
Keyword(s):  
Neutral Point ◽  
Voltage Source ◽  
Phase Voltage ◽  
Three Phase ◽  
Clamped Converter

scholarly journals High Performances of Five–Phase Induction Machine Feeding by A [3 × 5] Matrix Converter

2014 ◽  
Vol 65 (2) ◽  
pp. 83-89 ◽  
Author(s):  
Mohamed Mounir Rezaoui ◽  
Lazhari Nezli ◽  
Mohand Oulhadj Mahmoudi
Keyword(s):  
Induction Machine ◽  
Matrix Converter ◽  
Input Current ◽  
Phase Voltage ◽  
Current Modulation ◽  
Machine Drive ◽  
Three Phase ◽  
Control Matrix ◽  
Simulation Results ◽  
Four Quadrant

Abstract In this paper, we study an analytic technique to control matrix converter for a four-quadrant five-phase induction machine drive with use PWM five intervals modulation strategy. The multiphase induction machine is feeding by a matrix converter using a three-phase network. Special emphasis is given to the sinusoidal five phase voltage in the output and five phase voltage input current modulation. Simulation results are presented.

Three Phase Induction Motor Inverter Defects Diagnosis Using Voltage Spectrum of an Auxiliary Winding

2014 ◽  
Vol 672-674 ◽  
pp. 1244-1252
Author(s):  
Lamiaâ El Menzhi ◽  
Abdallah Saad
Keyword(s):  
Fourier Transform ◽  
Induction Motor ◽  
Time Domain ◽  
Phase Voltage ◽  
Voltage Inverter ◽  
Three Phase ◽  
Voltage Signal ◽  
Simulation Results ◽  
A New Technique ◽  
The Time Domain

In this paper, a new technique for diagnosing faults in three phase voltage inverter feeding induction motor is presented. It is based on the so-called the voltage spectrum of an auxiliary winding. For this purpose, expression of the inserted winding voltage is presented. After that, discrete Fourier transform analyzer is required for converting the voltage signal from the time domain to the frequency domain. Simulation results curried out for non defected and defected inverter show the effectiveness of the proposed method.

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