scholarly journals A New Single-Phase Transformerless Current Source Inverter for Leakage Current Reduction

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1633 ◽  
Author(s):  
Xiaoqiang Guo ◽  
Jianhua Zhang ◽  
Jiale Zhou ◽  
Baocheng Wang
Keyword(s):  
Leakage Current ◽  
Single Phase ◽  
Current Source ◽  
Current Source Inverter ◽  
Current Reduction

scholarly journals Single-Phase Current Source Inverter with Reduced Ground Leakage Current for Photovoltaic Applications

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1618
Author(s):  
Giovanni Migliazza ◽  
Emilio Lorenzani ◽  
Fabio Immovilli ◽  
Giampaolo Buticchi
Keyword(s):  
Leakage Current ◽  
Single Phase ◽  
High Reliability ◽  
Current Source ◽  
Phase Current ◽  
Current Source Inverter ◽  
Point Tracking ◽  
Photovoltaic Application ◽  
Photovoltaic Applications ◽  
Current Reduction

Integrated power electronics for photovoltaic applications has attracted increasing interest, due to the possibility of having grid-connected photovoltaic modules with independent maximum power point tracking and high reliability. In this paper, a single-phase Current Source Inverter (CSI) is discussed for a photovoltaic application. The basic CSI topology will be explained for the sake of completeness, highlighting its main features and analyzing the ground leakage current problem, an important benchmark for photovoltaic application. A novel topology, called CSI5, is proposed in this work. The main feature is the presence of additional switches for ground leakage current reduction. The performance of the proposed topology is assessed by numerical simulation, and the experimental results confirm that this solution is able to strongly reduce the ground leakage current and conduction power losses.

scholarly journals A Novel Transformerless Current Source Inverter for Leakage Current Reduction

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 50681-50690 ◽  
Author(s):  
Xiaoqiang Guo ◽  
Na Wang ◽  
Jianhua Zhang ◽  
Baocheng Wang ◽  
Minh-Khai Nguyen
Keyword(s):  
Leakage Current ◽  
Current Source ◽  
Current Source Inverter ◽  
Current Reduction

scholarly journals A Transformerless Single-Phase Current Source Inverter Topology and Control for Photovoltaic Applications

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2011 ◽  
Author(s):  
Jorge Cardoso ◽  
Nimrod Vazquez ◽  
Claudia Hernandez ◽  
Joaquin Vaquero
Keyword(s):  
Low Power ◽  
Leakage Current ◽  
Single Phase ◽  
Low Voltage ◽  
Neutral Line ◽  
Current Source ◽  
Total Efficiency ◽  
Pv System ◽  
Phase Current ◽  
Current Source Inverter

Low power grid-tied photovoltaic (PV) generation systems increasingly use transformerless inverters. The elimination of the transformer allows smaller, lighter and cheaper systems, and improves the total efficiency. However, a leakage current may appear, flowing from the grid to the PV panels through the existing parasitic capacitance between them, since there is no galvanic isolation. As a result, electromagnetic interferences and security issues arise. This paper presents a novel transformerless single-phase Current Source Inverter (CSI) topology with a reduced inductor, compared to conventional CSIs. This topology directly connects the neutral line of the grid to the negative terminal of the PV system, referred as common mode configuration, eliminating this way, theoretically, the possibility of any leakage current through this terminal. The switches control is based on a hysteresis current controller together with a combinational logic circuitry and it is implemented in a digital platform based on National Instruments Technology. Results that validate the proposal, based on both simulations and tests of a low voltage low power prototype, are presented.

A Single-Phase Five-Level Transformer-Less PV Inverter for Leakage Current Reduction

2021 ◽  
pp. 1-1
Author(s):  
Xiaonan Zhu ◽  
Hongliang Wang ◽  
Wenyuan Zhang ◽  
Hanzhe Wang ◽  
Xiaojun Deng ◽  
...  
Keyword(s):  
Leakage Current ◽  
Single Phase ◽  
Pv Inverter ◽  
Current Reduction

scholarly journals Transformerless Quasi-Z-Source Inverter to Reduce Leakage Current for Single-Phase Grid-Tied Applications

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 312 ◽  
Author(s):  
Woo-Young Choi ◽  
Min-Kwon Yang
Keyword(s):  
Leakage Current ◽  
Power Efficiency ◽  
High Performance ◽  
Single Phase ◽  
Power Devices ◽  
Common Mode Voltage ◽  
Control Scheme ◽  
Frequency Components ◽  
The Common ◽  
Current Reduction

The conventional single-phase quasi-Z-source (QZS) inverter has a high leakage current as it is connected to the grid. To address this problem, this paper proposes a transformerless QZS inverter, which can reduce the leakage current for single-phase grid-tied applications. The proposed inverter effectively alleviates the leakage current problem by removing high-frequency components for the common-mode voltage. The operation principle of the proposed inverter is described together with its control strategy. A control scheme is presented for regulating the DC-link voltage and the grid current. A 1.0 kW prototype inverter was designed and tested to verify the performance of the proposed inverter. Silicon carbide (SiC) power devices were applied to the proposed inverter to increase the power efficiency. The experimental results showed that the proposed inverter achieved high performance for leakage current reduction and power efficiency improvement.

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