Control strategy for a three-phase to single-phase power converter using an active buffer with a small capacitor

2009 ◽  
Author(s):  
Yoshiya Ohnuma ◽  
J.-I. Itoh
Keyword(s):  
Control Strategy ◽  
Single Phase ◽  
Power Converter ◽  
Three Phase

scholarly journals Improved Voltage Unbalance and Harmonics Compensation Control Strategy for an Isolated Microgrid

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2688 ◽  
Author(s):  
Mohammad Jafar Hadidian Moghaddam ◽  
Akhtar Kalam ◽  
Mohammad Reza Miveh ◽  
Amirreza Naderipour ◽  
Foad H. Gandoman ◽  
...  
Keyword(s):  
Control Strategy ◽  
Power Converter ◽  
Phase Model ◽  
Nonlinear Load ◽  
Loop Control ◽  
Single Input Single Output ◽  
Three Phase ◽  
Control Scheme ◽  
Unbalanced Load ◽  
Load Conditions

This paper suggests an enhanced control scheme for a four-leg battery energy storage systems (BESS) under unbalanced and nonlinear load conditions operating in the isolated microgrid. Simplicity, tiny steady-state error, fast transient response, and low total harmonic distortion (THD) are the main advantages of the method. Firstly, a new decoupled per-phase model for the three-phase four-leg inverter is presented. It can eliminate the effect of power stage coupling on control design; thus, the three-phase four-leg power inverter can be viewed as three single input single output (SISO) control systems. Then, using an improved orthogonal signal generation method, the per-phase model of the four-leg inverter in the stationary and synchronous frame is derived. As the second step, a per-phase multi-loop control scheme for the four-leg inverter under unbalanced load conditions is suggested. The proposed control strategy has the ability to provide balanced output voltages under unbalanced load conditions by avoiding the need to deal with the symmetrical components. Finally, a multi-resonant harmonic compensator is used to actively prevent low-order harmonic currents to distort the output voltages of the three-phase four-leg grid-forming power converter. Simulations results are also presented to verify the performance of the suggested control strategy.

The Research on Main Circuit Parameters and its Control Law of TCR Single-Phase to Three-Phase Power Converter

2015 ◽  
Vol 740 ◽  
pp. 359-363
Author(s):  
Shi Long Chen ◽  
Lu Luo ◽  
Yan Wu Wang
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
High Reliability ◽  
Power Converter ◽  
Control Law ◽  
Configuration Theory ◽  
Three Phase ◽  
Railway System ◽  
Electrified Railway ◽  
And Control

The TCR single-phase to three-phase power converter has been widely used in electrified railway system as its simple control raw and high reliability. The research on main circuit parameters and its control law is necessary to design suitable TCR single phase to three phase power converter. This paper analyses the main circuit of TCR single phase to three phase power converter, and acquires the parameters configuration theory of each element in main circuit and control law of converter when the power factor varies from 0.7 to 0.9.

scholarly journals Output-Feedback Nonlinear Adaptive Control Strategy of Three-phase AC/DC Boost Power Converter for On-line UPS Systems

2016 ◽  
Vol 49 (13) ◽  
pp. 324-329 ◽  
Author(s):  
M. Kissaoui ◽  
A.A.R. Al Tahir ◽  
A. Abouloifa ◽  
F.Z. Chaoui ◽  
Y. Abouelmahjoub ◽  
...  
Keyword(s):  
Adaptive Control ◽  
Control Strategy ◽  
Output Feedback ◽  
Power Converter ◽  
Nonlinear Adaptive Control ◽  
Three Phase ◽  
On Line ◽  
Adaptive Control Strategy

scholarly journals Unified Power Flow Controller Based on Autotransformer Structure

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1542
Author(s):  
Hyun-Jun Lee ◽  
Dae-Shik Lee ◽  
Young-Doo Yoon
Keyword(s):  
Power Flow ◽  
Single Phase ◽  
Low Voltage ◽  
Power Converter ◽  
Unified Power Flow Controller ◽  
Phase System ◽  
Three Phase ◽  
Flow Controller ◽  
And Control ◽  
Power Flow Controller

This paper proposes a new unified power flow controller (UPFC) topology. A single phase of them system with the proposed topology consists of an N:2 transformer with a center tap at the low-voltage side and a power converter module comprising full- and half-bridge converters. A three-phase system can be implemented with three devices. While the conventional UPFC topology uses two three-phase transformers, which are called series and parallel transformers, the proposed topology utilizes three single-phase transformers to implement a three-phase UPFC system. By using an autotransformer structure, the power rating of the transformers and the voltage rating of switches in the power converter module can be significantly decreased. As a result, it is possible to reduce the installation spaces and costs compared with the conventional UPFC topology. In addition, by adopting a full- and half-bridge converter structure, the proposed topology can be easily implemented with conventional power devices and control techniques. The techniques used to control the proposed topology are described in this paper. The results obtained from simulations and experiments verify the effectiveness of the proposed UPFC topology.

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