Results 51 to 60 of about 5,969,124 (243)

Analysis of unbalanced clustered voltage and control strategy of clustered voltage balancing for cascaded H-bridge STATCOM

Journal of Modern Power Systems and Clean Energy, 2019
To explore the clustered voltage balancing mechanism of the cascaded H-bridge static synchronous compensator (STATCOM), this paper analyzes the causes of unbalanced clustered voltage. The negative-sequence current caused by the compensation of unbalanced
Yu Jin, Jianze Wang, Yiqi Liu, Xinagyu Sai, Yanchao Ji   +4 more
doaj   +1 more source

Optimal Voltage-Balancing Compensator in the Modulation of a Neutral-Point-Clamped Converter

, 2007
This paper presents an optimal voltage-balancing compensator for a particular type of modulation technique applied to the neutral-point-clamped converter. This modulation technique is able to completely eliminate low-frequency voltage oscillations in the
Pou, Josep, Jordi Zaragoza, Josep Pou, Salvador Ceballos, Carles Jaen, Jaen, Carles, Eider Robles, Robles, Eider, Zaragoza, Jordi, Ceballos, Salvador   +9 more
core   +1 more source

Direct control strategy for a four-level three-phase flying-capacitor inverter [PDF]

, 2010
A direct predictive control strategy is proposed for a three-phase four-level flying-capacitor (FC) inverter in this paper. The balancing of the FC voltages, a challenge in applications with small capacitors and low switching frequencies, is done without
Llor, Ana-Maria, Fadel, Maurice, Defaÿ, François   +2 more
core   +1 more source

Extracellular matrix remodeling and immune reprogramming drive residual tumor progression of liver cancer after incomplete microwave ablation

Molecular Oncology, EarlyView.
Incomplete microwave ablation (iMWA) of liver cancer triggers a biphasic progression in residual tumors. At Day 3, the microenvironment is characterized by acute inflammatory responses and extracellular matrix (ECM) remodeling. By Day 14, a profound shift occurs toward oncogenic signal transduction and immunosuppression, marked by macrophage ...
Yu Liu, Yubei He, Nikolaus Berndt, Michael Mülleder, Kathrin Textoris‐Taube, Jing Guo, Matthias Stechele, Justus Ramtke, Shraga Nahum Goldberg, Lynn Jeanette Savic   +9 more
wiley   +1 more source

Simplified double switching SVPWM implementation for three-level VSI

The Journal of Engineering, 2019
A generalised space vector pulse width modulation (SVPWM) framework for the realisation of all double switching states with a memory-optimised method is proposed to reduce the total harmonic distortion (THD) and to provide neutral point voltage balancing
Gopinathan Vivek, Jayanta Biswas, Meenu D. Nair, Mukti Barai   +3 more
doaj   +1 more source

Voltage-Balancing Strategy for Three-Level Neutral-Point-Clamped Cascade Converter under Sequence Smooth Modulation

Energies, 2020
Three-level neutral-point clamped cascaded converters (3LNPC-CC) are widely used in high power nigh-voltage applications. This paper mainly discusses the open-circuit fault in DC-side of the 3LNPC-CC.
Le Yu, Xu Peng, Chao Zhou, Shibin Gao
doaj   +1 more source

An analogous carrier‐based implementation of virtual space vector modulation with low common‐mode voltage and neutral‐point voltage oscillation elimination for three‐level NPC inverter

IET Power Electronics, 2023
Balancing control of neutral‐point voltage (NPV) and reducing common‐mode voltage (CMV) are crucial for a three‐level neutral‐point‐clamped (NPC) inverter.
Zhuoxun Liu, Xiangguo Xu
doaj   +1 more source

Neutral-point Voltage Control of Three-level NPC Inverter for Three-phase APF based on Zero-sequence Voltage Injection [PDF]

, 2019
© 2019 IEEE. Active Power Filters (APF) have already adopted the three-level inverter topology in medium-voltage and high-power applications for solving power-quality problems.
Asif Khan, Vivek Sharma, Sharma, V, S.M. Nawazish Ali, Khan, A, Kashif, M, Muhammad Kashif, Hossain, MJ, Nawazish Ali, SM, M.J. Hossain   +9 more
core   +1 more source

Pathways and pitfalls: a qualitative study of student experiences in biomedical science education

FEBS Open Bio, EarlyView.
Biomedical science students from underrepresented backgrounds face barriers including financial strain, disrupted laboratory access and cultural exclusion. Peer networks provide vital support when institutional systems are difficult to navigate. To create inclusive learning environments and achieve academic success, educators should blend active, hands‐
Olivia J. Russell, Cassy Ross, Panagiota S. Filippou, Bruno Silvester Lopes, Dominic Gilchrist, Paul Dean, Kamar Ameen‐Ali, Tora K. Smulders‐Srinivasan, Ahmad A. Khundakar   +8 more
wiley   +1 more source

A Switched-Capacitor-Based Five-Level ANPC DC–AC Power Converter With Full DC-Bus Utilization

IEEE Access
This paper presents a self-balanced five-level active neutral-point-clamped inverter with unity voltage gain. The proposed topology consists of seven active switches, six diodes, a low-voltage switched capacitor, and two dc-link capacitors to generate a ...
Rezwan Allabasha, K. Vijayakumar, Meshari S. Alshammari, Mamdouh L. Alghaythi, Mohamed Z. Youssef, M. Jagabar Sathik   +5 more
doaj   +1 more source