Article
Engineering, Electrical & Electronic
Albrecht Gensior
Summary: This paper proposes a converter system consisting of parallel-connected two-level voltage source converters and designs corresponding controllers. The controllers control the grid currents and converter currents in two stages using hysteresis controllers, aiming to achieve the desired current distribution. The proposed approach is validated through measurements, with results showing lower semiconductor losses and grid current harmonic distortion compared to a benchmark approach.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Muhammad Haseeb Arshad, Sami El-Farik, Mohamed Abido, Mati-Ur-Rasool, Md. Ismail Hossain
Summary: This study proposes a two-stage cascaded control strategy based on inverter-side current for a single-phase grid-connected inverter, aiming to minimize grid current tracking error, total harmonic distortion, and address system resonance issues. The proposed controller demonstrates faster dynamic response under steady-state operation and external disturbances.
Article
Engineering, Electrical & Electronic
Guang-Xin Zhong, Zhiteng Wang, Jian Li, Qingyu Su
Summary: This paper investigates the design of sliding mode fault observer and identifier for closed-loop grid-connected inverter. The mathematical model of the closed-loop grid-connected inverter system is first established, followed by the analysis of the fault model. A fault detection sliding mode observer is then designed by solving linear matrix inequalities, which exhibits good robustness. By employing a suitable adaptive law, sliding mode adaptive fault identifiers are designed for different circuit fault components. The effectiveness of the designed fault observer and identifier is finally validated in a simulation platform.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Energy & Fuels
Abu Sufyan, Mohsin Jamil, Salman Ghafoor, Qasim Awais, Hafiz Ali Ahmad, Ashraf Ali Khan, Hassan Abouobaida
Summary: This paper introduces a novel design of super-twisting integral sliding mode control (ST-ISMC) strategy applied to a three-phase voltage source grid-connected inverter for the first time. The controller exhibits robustness and low total harmonic distortion (THD) in the presence of various uncertainties and disturbances.
Article
Energy & Fuels
Aditi Atul Desai, Suresh Mikkili, Tomonobu Senjyu
Summary: This research paper conducts a detailed analysis of H4, H5, and H6 transformerless inverters and proposes a novel H6 inverter topology that reduces conduction losses and eliminates leakage current by introducing an additional switch.
Article
Engineering, Electrical & Electronic
Ruibin Wang, Huafeng Xiao, Linwei Zhou, Ming Cheng
Summary: Soft-switching technique is important for transformerless grid-connected inverters as it improves conversion efficiency and switching frequency, leading to higher power density and lower cost. However, existing soft-switching TLIs can only operate with unity power factor, which prevents them from providing reactive power required by new technical standards. This article proposes a novel zero-voltage-transition (ZVT) scheme and applies two compact resonant tanks in H6-type topology to address this issue. Experimental results from a 100kHz/1kW prototype validate the correctness of the proposed inverter.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Qingfang Teng, Guorong Xu, Xuewei Zheng, Hao Mai, Xiping Ma, Yanbo Wang
Summary: This paper proposes a new sliding mode observer (SMO)-based compound sliding mode current control (CSMCC) strategy for the single-phase grid-tied inverter system in weak grid. The SMO is designed to estimate the inverter-side current and capacitor voltage of LCL-type filter for feedback control. The CSMCC is composed of equivalent control and reaching law-based second-order nonsingular terminal sliding mode control (NTSMC) to enhance robustness against parameter variations. The strategy also includes active damping and weighted average current-based feedback to suppress resonance and improve grid current quality. Simulation and experimental results demonstrate the effectiveness of the proposed strategy.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Khaled Rayane, Mohamed Bougrine, Haitham Abu-Rub, Atallah Benalia, Mohamed Trabelsi
Summary: This article introduces a new control strategy based on sliding mode phase shift PWM (SM-PSPWM) for a grid-connected Packed U-Cell (PUC) inverter. The strategy uses multicarriers phase shift pulsewidth modulation (PS-PWM) technique and ensures high steady-state performance, low harmonic current, and enhanced thermal properties. Sliding mode control (SMC) is applied for fast dynamical response and high robustness, and an integral term is added to improve accuracy and stability under parameter mismatch and distorted grid voltage conditions. The proposed controller is validated through simulation and laboratory setup.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Saban Ozdemir, Necmi Altin, Ibrahim Sefa, Zhen Zhang, Hasan Komurcugil
Summary: This paper presents an effective sliding mode control method based on the super twisting algorithm for three-phase grid-tied three-level neutral point clamped inverters. The proposed method achieves good tracking performance and suppresses chattering while maintaining the robustness and simplicity of sliding mode control. It is also capable of operating with imbalanced and deteriorated grid voltages.
Article
Engineering, Electrical & Electronic
Usman Ali Khan, Ashraf Ali Khan, Fazal Akbar, Jung-Wook Park
Summary: In this study, a novel full-bridge single-stage transformerless buck-boost inverter is proposed with bidirectional capability, continuous output current, and simple operation. The proposed inverter can handle reactive power and step up or down the input voltage in a single stage. Circuit analysis shows that the proposed inverter has lower power losses and higher efficiency than conventional topologies.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Yan Chen, Junli Meng, Yuanyuan Yan, Lin Zhong
Summary: In this paper, an average state model for the photovoltaic quasi-Z-source inverter is established, and an adaptive reaching law with second-order sliding mode characteristics is designed to address the non-linear characteristics of the photovoltaic modules and quasi-Z-source inverters. By using a sliding mode controller based on adaptive reaching law, the stability of the DC-link voltage and the small capacitor voltage ripple of the photovoltaic system can be effectively controlled, resulting in improved maximum power point tracking and grid-connection effect.
IET POWER ELECTRONICS
(2023)
Article
Energy & Fuels
Li Ying, Yang Yong-xiang, Lv Bo, Tang Qian, Ren Jia-kuan
Summary: This paper proposes an improved strategy for the grid-connected inverter with capacitive voltage type full feedforward by adding a low-pass filter in the traditional phase-locked loop, and verifies its effectiveness through simulation. The results demonstrate that the improved phase-locked loop can effectively improve the quality of the grid current and enhance the stability of the inverter system.
Article
Engineering, Electrical & Electronic
Xin Ding, Junyang Liang, Shangping Lu, Fannie Kong, Yanming Chen
Summary: This paper proposes a robust back-stepping sliding mode control strategy for LCL-type grid-connected inverters in weak grids. By using exact feedback linearization and parameter adjustment, the expected stability performance and dynamic performance are achieved.
JOURNAL OF POWER ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Md Mizanur Rahman, Mohammad Shafayet Hossain, Md Shoriful Islam Talukder, Mohammad Nasir Uddin
Summary: This article proposes a new transformerless H6 inverter topology to overcome the conduction loss and leakage current problem associated with conventional transformerless inverters. The effectiveness of the proposed topology is validated through simulation and experimental results.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jorge Rivera, Susana Ortega-Cisneros, Julio C. Rosas-Caro, Omar-Fernando Ruiz-Martinez
Summary: This work focuses on the design of a higher-order sliding mode output regulator for trajectory tracking of the voltage capacitor in a boost inverter. The proposed control strategy stabilizes the current through the inductor by directly controlling the output using an appropriate sliding function. Real-time experimentation confirms the good performance of the control strategy.
APPLIED SCIENCES-BASEL
(2023)
