Xiongfeng Fang

Voltage Predictive Control Strategy for CLLC Resonant Converters Based on Simplified TimeDomain Model

Hongwei Zhao, Lei Li, Ruonan Ma, Li Ang Fei et autres

cn (code pays fourni par la source)

FHA-Based Power Mapping with Damped TDA Correction for Single-Stage Bidirectional AC/DC Converters

Ruonan Ma, Lei Li, Hongwei Zhao, Liang Fei et autres

cn (code pays fourni par la source)

Dynamics-Enhanced Dual-Energy Transition Control of Low-Capacitance Voltage-Doubler LCC Converter Based on High-Precision State-Trajectory Modeling

Cheng Wang, Haoyuan Li, Zhennan Zhao, Jimin Chen et autres

This paper introduces a high-precision state-trajectory modeling approach and a dynamics-enhanced dual-energy transition control strategy for low-capacitance voltage-doubler LCC resonant converters (VDR-LCC). It aims to enable rapid tube-voltage switching in dual-energy computed tomography (CT) scenarios. A time-domain VDR-LCC model is first developed …

cn, jp (code pays fourni par la source)

High-Fidelity Modeling of Lithium-Ion Batteries Integrating Electrochemical-Thermal Dynamics and Solid-Electrolyte-Interface-Driven Capacity Degradation

Xiang Tao, Cheng Wang, Xiongfeng Fang, Jiazhi Lei et autres

This paper introduces a novel, multiphysics modeling approach for lithium-ion batteries that explicitly couples electrochemical reactions, thermal dynamics, and capacity degradation mechanisms. Using explicit equations that are highly suitable for practical applications, the model combines a one-dimensional electrochemical model with a three-dimensional …

cn (code pays fourni par la source)

DC infeed fault ride-through operation of cascaded H-bridge multilevel inverter based on DC-coupled thyristors

Cheng Wang, Wei Chen, Xiongfeng Fang, Xujun Ma et autres

The cascaded H-bridge multilevel inverter (CHB) presents a promising solution for utility-scale renewable energy integration, offering superior modularity, distributed MPPT capability, and direct high-voltage interfacing. However, its reliability remains challenging due to component-intensive architecture involving multiple DC sources, switching devices, and monitoring …

cn (code pays fourni par la source)

Thyristor-Assisted Hybrid MMC with Enhanced DC Fault Blocking Capability and Reduced Power Losses

Xiongfeng Fang, Gen Li, Minghui Yin

Hybrid modular multilevel converters (HMMCs), consisting of full-bridge submodules (FB-SMs) and half-bridge submodules (HB-SMs), are well known for their dc fault blocking capability and operational flexibility. However, the dc fault blocking performance of HMMCs depends heavily on a high proportion of FB-SMs, …

High-Precision Fundamental Harmonic Modeling and Parameter Design of Low-Capacitance Voltage Doubler-Based LCC Converter

Zhennan Zhao, Cheng Wang, Xiongfeng Fang, Liqun He et autres

Low-output-capacitance is preferred by voltage-doubler rectifier based inductor-capacitor-capacitor (LCC) resonant converters (VDR-LCC) when generating pulsed high voltage for medical imaging X-ray systems. However, low capacitance participates in the resonance process and has significant impact on the VDR-LCC operation. This article discovers such …

cn (code pays fourni par la source)

Accuracy-Enhanced Simplified Time-Domain Analysis for Inner Phase-Shift Control in CLLC Converter

Longteng Jiao, Xiongfeng Fang, Zhiyong Zeng

The CLLC converter is widely utilized in applications requiring bidirectional power flow. While pulse frequency modulation (PFM) has traditionally been employed to control CLLC converter, it fails to adequately regulate voltage under high-frequency operation and light load. Inner phase-shift modulation (IPSM) offers …

cn (code pays fourni par la source)

Research on Multi-port Collaborative Network Based on High-Order Generalized Averaging Method

Lei Li, Cheng Wang, Xiongfeng Fang, Dongwei Yu et autres

With the increasing proportion of renewable energy in power systems, multi-port collaborative network has become a crucial trend in the future development of power systems. When the fundamental frequency of power electronic converters falls over the Nyquist interval of switching frequency, the …

cn (code pays fourni par la source)

Thyristor Branch-Assisted Modular Multilevel Converter for Handling DC Short-Circuit Faults

Dongwei Yu, Lei Li, Gen Li, Siyu Xiao et autres

At present, High Voltage Direct Current (HVDC) transmission is increasingly critical in renewable energy grid integration and regional grid interconnections. However, DC short-circuit faults remain a major challenge to HVDC system stability. While modular multilevel converters (MMC) have been widely adopted, their …

cn (code pays fourni par la source)

Analysis and Design of a Novel Expandable AC-AC Boost Direct Converter

Zhixiang Zhang, L. Pu, Zhen Huang, Yutong Li et autres

Aiming at the problems of high switching loss, limited voltage gain and complicated commutation control in the traditional alternating current-ac (AC-AC) converter, this paper further investigates a new scalable single-phase boost AC-AC converter based on intrinsic commutation and symmetric bipolar operation, further …

cn (code pays fourni par la source)

Enhanced Submodule Selection Algorithm for Mitigating FB-SM Overvoltage and HB-SM Undervoltage in Hybrid MMCs During DC Faults

Xiongfeng Fang, Lei Li, Chao Gao, Cheng Wang

Blocking all submodules (SMs) of hybrid modular multilevel converters (HMMCs) is a simple and rapid way to clear dc fault currents. However, full-bridge submodules (FB-SMs) must absorb nearly all of the fault energy stored in inductors and dc transmission lines, which can …

cn, hk (code pays fourni par la source)