A Control Method of Superposition Ratio in the Improvement of Voltage Utilization Factor in Three-Phase Multilevel Inverter Considering the DC Voltage Fluctuation

2007 ◽  
Author(s):  
Kenji Amei ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Control Method ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Utilization Factor ◽  
Dc Voltage ◽  
Three Phase

A Simple Control Method of Output Voltage for Three-Phase Multilevel Inverter Considering the DC Voltage Fluctuation

2008 ◽  
Vol 128 (3) ◽  
pp. 244-250
Author(s):  
Kenji Amei ◽  
Kenji Teshima ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Output Voltage ◽  
Control Method ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Dc Voltage ◽  
Three Phase

A simple method for output voltage control of a three-phase multilevel inverter considering DC voltage fluctuation

2010 ◽  
Vol 170 (3) ◽  
pp. 40-47
Author(s):  
Kenji Amei ◽  
Kenji Teshima ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Output Voltage ◽  
Voltage Control ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Simple Method ◽  
Dc Voltage ◽  
Three Phase

Research on Main-Line Voltage Fluctuation of Z-Source Inverter

2012 ◽  
Vol 430-432 ◽  
pp. 1273-1276
Author(s):  
Ru Qi Cheng ◽  
Yao Zhao ◽  
Geng Shen Zhao ◽  
Zhi Hua Zha
Keyword(s):  
Circuit Design ◽  
Control Method ◽  
Second Harmonic ◽  
Sine Wave ◽  
Main Line ◽  
Voltage Fluctuation ◽  
Line Voltage ◽  
Dc Voltage ◽  
Harmonic Content ◽  
And Control

Z-source inverter main-line voltage has a fluctuation and its frequency is same with the second harmonic of output sine wave, it will increase the second harmonic content of output which affecting the performance of the inverter. Introduced the topology and control method of Z-source inverter. By modeling the Z-source inverter, analyzed the reason of DC voltage fluctuation. Proposed the method to weak the fluctuation based on circuit design. By Comparing the simulation results of main-line voltage under various circuit parameters, verified the effectiveness of this method.

scholarly journals Three-Phase Six-Level Multilevel Voltage Source Inverter: Modeling and Experimental Validation

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1133
Author(s):  
Sheikh Tanzim Meraj ◽  
Nor Zaihar Yahaya ◽  
Kamrul Hasan ◽  
Molla Shahadat Hossain Lipu ◽  
Ammar Masaoud ◽  
...  
Keyword(s):  
Output Voltage ◽  
Experimental Validation ◽  
High Efficiency ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Voltage Step ◽  
Current Harmonics ◽  
Dc Voltage ◽  
Three Phase ◽  
Vector Modulation

This research proposes a three-phase six-level multilevel inverter depending on twelve-switch three-phase Bridge and multilevel DC-link. The proposed architecture increases the number of voltage levels with less power components than conventional inverters such as the flying capacitor, cascaded H-bridge, diode-clamped and other recently established multilevel inverter topologies. The multilevel DC-link circuit is constructed by connecting three distinct DC voltage supplies, such as single DC supply, half-bridge and full-bridge cells. The purpose of both full-bridge and half-bridge cells is to provide a variable DC voltage with a common voltage step to the three-phase bridge’s mid-point. A vector modulation technique is also employed to achieve the desired output voltage waveforms. The proposed inverter can operate as a six-level or two-level inverter, depending on the magnitude of the modulation indexes. To guarantee the feasibility of the proposed configuration, the proposed inverter’s prototype is developed, and the experimental results are provided. The proposed inverter showed good performance with high efficiency of 97.59% following the IEEE 1547 standard. The current harmonics of the proposed inverter was also minimized to only 5.8%.

scholarly journals Three Phase Eleven Level Modular Multilevel Inverter with PD-PWM for Grid Connected System

2020 ◽  
pp. 86-91
Author(s):  
P Yogini Dr. Sujatha Balaraman,
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Utilization Factor ◽  
Multilevel Inverters ◽  
Three Phase ◽  
Conversion System ◽  
Effective Use

The prominence of Modular Multilevel Inverters (MMI) is rising owing their merits of simple mechanical construction and good voltage sharing for semiconductor devices. Mostly Multilevel Inverters use more than one source; however, the effective use of all the sources at all levels is rare. Conventional Multilevel Inverters will diminish the energy efficiency of the conversion system. When compared to conventional multilevel inverter, Modular Multilevel Inverter with a high numbers of voltage levels seem to be the most suitable because of the use of an isolated dc source. This paper explores a three-phase eleven level modular multilevel inverter with phase disposition pulse width modulation technique (PD-PWM) that can extract power from all the sources at all the levels. Besides, this paper develops a synchronous d-q reference frame controller to control the current of 11kV. When compared with Reduced Switch Count based Multilevel Inverter Series/Parallel switching topologies, the Modular Multilevel Inverter provides better Total Harmonic Distortion (THD) of output voltage and utilization factor.

Study of PWM Voltage Source Rectifier Based on Predictive Current Control Strategy

2013 ◽  
Vol 380-384 ◽  
pp. 3069-3072
Author(s):  
Quan Wen ◽  
Ling Zhu
Keyword(s):  
Control Method ◽  
Control Strategies ◽  
Dynamic Performance ◽  
Current Control ◽  
Voltage Source ◽  
Dc Voltage ◽  
Three Phase ◽  
Ac Current ◽  
Dc Voltage Control ◽  
Discrete Mathematical Model

Traditional current strategy based on dq transformation used in three-phase PWM voltage source rectifier (VSR) has some shortcomings, such as dynamic response slow and DC voltage fluctuation. According to the problems, firstly this paper established discrete mathematical model of VSR, derived predictive current control strategies for VSR. Secondly, design a dual-closed-loop controller with current inner loop and voltage outer loop for the system. Finally, experimental researches are done. The results show that the three-phase PWM voltage source rectifier based on predictive current control in stabilizing DC voltage, control the AC current, etc, it has good steady-state and dynamic performance. The control method is simple, easy to implement, and has a certain practical value.

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