Article
Automation & Control Systems
Yimin Lu, Xuefei Wei, Xianfeng Huang, Zhihong Yin
Summary: This article investigates the dynamics of a power electronic circuit, specifically the PI control system of an LLC resonant dc-dc converter, by establishing an equivalent memristor model for the system. The study utilizes mathematical methods such as Floquet theory, bifurcation diagrams, and Poincare maps to analyze the system's behavior. The results confirm the presence of various nonlinear phenomena and increased uncertainty in the system due to changes in parameters. Understanding the dynamical characteristics of power electronics systems from the perspective of transient transition and multistability is crucial for ensuring safe and reliable operation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jiann-Jong Chen, Yuh-Shyan Hwang, Hung- Liu, Chien-Hung Lai, Yitsen Ku
Summary: A low-noise fast-transient-response buck converter suitable for sensor networks is proposed, which features an integral loop filter with noise shaping and superiority of oversampling. The converter also utilizes transient-accelerated circuits to speed up the transient response. Simulation and measurement results show that the proposed converter achieves low spurious noise, fast transient response, and high power efficiency.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Information Systems
Amr Marey, Mahajan Sagar Bhaskar, Dhafer Almakhles, Hala Mostafa
Summary: This paper presents a new generalized modeling technique for accurately simulating the transient behavior of DC-DC converter systems. The experimental results align with the theoretical analysis, validating the effectiveness of this approach.
Article
Engineering, Electrical & Electronic
Yunting Liu, Fang Z. Peng
Summary: This article presents a DC capacitor-less Solid State Variable Capacitor (SSVC) which removes bulky DC capacitors used in traditional systems, simplifying the structure and improving reliability. By utilizing AC-side voltage to support DC voltage, this innovative approach only requires a small capacitor for filtering, enabling the removal of other capacitors from the DC link busbar.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Mahnaz Izadi, Ali Mosallanejad, Alireza Lahooti Eshkevari
Summary: This paper proposes an improved coupled inductor-based DC-DC converter for high quadratic voltage conversion ratio without excessive voltage stresses on the power switch. The converter utilizes an active clamp circuit with zero-voltage switching feature to reduce conduction loss. It also benefits from continuous input current, high gain, high efficiency, and an appropriate number of components. The theory and operation of this converter are described, and experimental results confirm its performance.
IET POWER ELECTRONICS
(2023)
Article
Green & Sustainable Science & Technology
Lan Ma, Xiaoqi Cao, Rui Fu, Tao Zhou, Zeliang Shu
Summary: This paper proposes a method based on fixed center state trajectory to improve the transient response of LLC resonant converters. By optimizing each step of the fixed center state trajectory, the converter can achieve symmetric current limitation with the shortest path. Moreover, the proposed method is also applicable to full-bridge LLC converters, and corresponding optimal state trajectories are given for both step-up and step-down processes. To overcome the challenge caused by digital delay, a fast load transient control based on 3D look-up table is introduced, which significantly reduces the computation requirement of hardware controllers. Experimental results on a 380V/12V LLC converter prototype validate the effectiveness of the proposed method in improving the transient response of H-F LLC resonant converters.
IET RENEWABLE POWER GENERATION
(2023)
Article
Engineering, Electrical & Electronic
Darioush Alizadeh, Ebrahim Babaei, Mehran Sabahi, Carlo Cecati
Summary: This paper proposes a high voltage gain hybrid interleaved DC-DC converter (HIC) with quadratic voltage gain, which is suitable for renewable energy systems. The hybrid technique is used to increase the output voltage, and the converter utilizes the interleaved boost converter to share the input current with low ripple, extending the lifetime of the renewable power source. Additionally, the converter features low voltage stress, reducing conduction losses and cost of components, and shares ground between input and output with high efficiency.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Qiaohui He, Priyank Shah, Xiaowei Zhao
Summary: This paper proposes a GRU-based framework to eliminate false data injection attacks in DC microgrid. The framework consists of two parts, one for estimating the actual DC bus voltage and the other for mitigating malicious cyber-attacks. Simulation results demonstrate the satisfactory performance of the framework under various operating scenarios.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Biyadgie Ayalew, Mohamed Shawky El Moursi, Ehab F. El-Saadany
Summary: This paper proposes a new control strategy to enhance dc voltage regulation and transient response in the multi-terminal VSC-HVDC system. The strategy ensures quick power-sharing among converters during large disturbances and limits converter current during AC faults. A simplified model is also developed to analyze the performance of the strategy. Time-domain simulations validate the effectiveness of the proposed control strategy.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Automation & Control Systems
Rafal Kopacz, Michal Harasimczuk, Przemyslaw Trochimiuk, Jacek Rabkowski
Summary: This article investigates the soft-switching quasi-square-wave (QSW) technique in dc/dc SiC-based flying capacitor converter with quasi-two-level (Q2L) control. The proposed system achieves high-efficiency soft-switched bidirectional converters with low-voltage power transistors by utilizing TCM and Q2L control for near critical conduction mode operation. Addition of auxiliary transistor capacitances ensures the soft-switching process, leading to high power density and peak efficiency of 99.5%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Maalandish, Seyed Hossein Hosseini, Mehran Sabahi, Naghi Rostami, Mohammad-Hassan Khooban
Summary: This study proposes a new multi-input multi-output (MIMO) high step-up DC-DC converter for battery charger applications. The main advantages include continuous input current, capability of using renewable energy sources with different voltage-current characteristics, high voltage gain, low power losses on semiconductors, and independent duty cycle for each input source. The proposed topology also achieves soft-switching on power diodes, leading to increased overall efficiency. A laboratory prototype of the proposed topology is built and tested, with experimental results verifying its proper performance and confirming the theoretical analysis.
IET POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zhen Zhu, Fujun Ma, Liheng Lin, Lei Wang, Dexing Kuang, Qianming Xu, Man-Chung Wong
Summary: This article introduces a new three-level cascaded noninverting buck-boost converter (TL-CNIBB) that is suitable for a wide-range voltage input of renewable energy. The operation principle and fundamental issues of TL-CNIBB are analyzed, and a systematic control strategy, smooth transition technologies, and a modified hysteretic transition method are proposed to address the challenges. Experiment results of the TL-CNIBB system demonstrate its high viability and flexibility.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Cheng Wang, Tao Yang, Habibu Hussaini, Serhiy Bozhko
Summary: This article proposes an innovative modulation scheme that utilizes a buck-boost dc-dc converter as a harmonic absorber to address the power quality challenges caused by harmonics generated from power electronic converters on future aircraft. Experimental results demonstrate the effectiveness of the proposed methods, which include the equal-gate-width modulation technique for active control of specific harmonic components from a dc-dc converter and a hybrid power generation system involving a high-speed electrical generator and a high voltage battery.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Energy & Fuels
Peter Hacke, Daniel Clemens, Ramanathan Thiagarajan, Jack Flicker, Hironobu Igarashi
Summary: Two procedures were developed to evaluate the long-term reliability of key components in PV inverters, with heat run tests used to determine the highest operating temperatures. The study demonstrated maximum temperatures for the DC bus link capacitors and power transistor module under different ambient conditions, providing a basis for fair evaluation of inverter reliability.
PROGRESS IN PHOTOVOLTAICS
(2021)
Article
Engineering, Electrical & Electronic
Qurat ul Ain, Danial Khan, Byeong Gi Jang, Muhammad Basim, Khuram Shehzad, Muhammad Asif, Deeksha Verma, Imran Ali, Young Gun Pu, Keum Cheol Hwang, Youngoo Yang, Kang-Yoon Lee
Summary: This article presents a high-efficiency fast transient COT control DC-DC buck converter for IoT applications, which utilizes current reused current sensor and fast transient DC-offset cancellation technique to enhance loop stability and improve power conversion efficiency. This design achieves peak efficiency of 95.56% at 0.5 A and efficiency of 84.60% at light load of 10 mA.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
