Active Power Decoupling Method for Single-Phase Current-Source Rectifier With No Additional Active Switches

2016 ◽  
Vol 31 (8) ◽  
pp. 5644-5654 ◽  
Author(s):  
Yao Sun ◽  
Yonglu Liu ◽  
Mei Su ◽  
Xin Li ◽  
Jian Yang
Keyword(s):  
Single Phase ◽  
Current Source ◽  
Active Power ◽  
Decoupling Method ◽  
Phase Current ◽  
Power Decoupling

scholarly journals Active Power Decoupling for Current Source Converters: An Overview Scenario

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 197 ◽  
Author(s):  
Jianhua Zhang ◽  
Hao Ding ◽  
Baocheng Wang ◽  
Xiaoqiang Guo ◽  
Sanjeevikumar Padmanaban
Keyword(s):  
Single Phase ◽  
Current Source ◽  
Low Frequency ◽  
Cost Effective ◽  
Active Power ◽  
Systematic Classification ◽  
Phase Current ◽  
Power Decoupling ◽  
Lc Circuit ◽  
Low Frequency Power

For single-phase current source converters, there is an inherent limitation in DC-side low-frequency power oscillation, which is twice the grid fundamental frequency. In practice, it transfers to the DC side and results in the low-frequency DC-link ripple. One possible solution is to install excessively large DC-link inductance for attenuating the ripple. However, it is of bulky size and not cost-effective. Another method is to use the passive LC branch for bypassing the power decoupling, but this is still not cost-effective due to the low-frequency LC circuit. Recently, active power decoupling techniques for the current source converters have been sparsely reported in literature. However, there has been no attempt to classify and understand them in a systematic way so far. In order to fill this gap, an overview of the active power decoupling for single-phase current source converters is presented in this paper. Systematic classification and comparison are provided for researchers and engineers to select the appropriate solutions for their specific applications.

scholarly journals Active Power Decoupling Design of a Single-Phase AC–DC Converter

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 841 ◽  
Author(s):  
Mingjie Qiu ◽  
Ping Wang ◽  
Huakun Bi ◽  
Zhishuang Wang
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Active Power ◽  
Second Order ◽  
Voltage Source ◽  
Decoupling Method ◽  
Power Decoupling ◽  
Phase Converter ◽  
Dc Bus ◽  
Bus Voltage

The second-order ripple power of single-phase converter causes second-order ripple voltages on the DC bus. For eliminating second-order ripple components, passive power decoupling methods including DC bus electrolytic capacitors have some shortcomings, such as low power density and poor stability of converters. Thus, an active power decoupling method based on a single-phase converter is proposed in this paper. The control method, taking single-phase voltage source pulse width modulation (PWM) rectifier (single-phase VSR) as the basic converter and adopting a buck-boost power decoupling circuit, introduces second-order ripple of DC bus voltage into a power decoupling circuit. The ripple acts as compensation of the phase deviation between the command value and the actual value of the second-order ripple current. Therefore, estimation of the second-order ripple current is more accurate, the power decoupling circuit absorbs the second-order ripple power behind the H-bridge more completely, and the DC bus voltage ripple is effectively suppressed accordingly. Finally, experimental results of the single-phase VSR are given to verify the validity of the proposed method.

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