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Liu, Yitao,Song, Zhendong,Yin, Shan,Peng, Jianchun,Jiang, Hui The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.2
With the development of renewable energy, grid-connected inverter technology has become an important research area. When compared with traditional silicon IGBT power devices, the silicon carbide (SiC) MOSFET shows obvious advantages in terms of its high-power density, low power loss and high-efficiency power supply system. It is suggested that this technology is highly suitable for three-phase AC motors, renewable energy vehicles, aerospace and military power supplies, etc. This paper focuses on the SiC MOSFET behaviors that concern the parasitic component influence throughout the whole working process, which is based on a three-phase grid-connected inverter. A high-speed model of power switch devices is built and theoretically analyzed. Then the power loss is determined through experimental validation.
Yitao Liu,Zhendong Song,Shan Yin,Jianchun Peng,Hui Jiang 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.2
With the development of renewable energy, grid-connected inverter technology has become an important research area. When compared with traditional silicon IGBT power devices, the silicon carbide (SiC) MOSFET shows obvious advantages in terms of its high-power density, low power loss and high-efficiency power supply system. It is suggested that this technology is highly suitable for three-phase AC motors, renewable energy vehicles, aerospace and military power supplies, etc. This paper focuses on the SiC MOSFET behaviors that concern the parasitic component influence throughout the whole working process, which is based on a three-phase grid-connected inverter. A high-speed model of power switch devices is built and theoretically analyzed. Then the power loss is determined through experimental validation.
( Yitao Xu ),( Dianxiong Liu ),( Cheng Ding ),( Yuhua Xu ),( Zongsheng Zhang ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.11
In this article, we model the distributed relay assignment network as a many-to-one matching market with peer effects. We discuss two scenarios for throughput optimization of relay networks: the scenario of aggregate throughput optimization and the scenario of fairness performance optimization. For the first scenario, we propose a Mutual Benefit-based Deferred Acceptance (MBDA) algorithm to increase the aggregate network throughput. For the second scenario, instead of using the alternative matching scheme, a non-substitution matching algorithm (NSA) is designed to solve the fairness problem. The NSA improves the fairness performance. We prove that both two algorithms converge to a globally stable matching, and discuss the practical implementation. Simulation results show that the performance of MBDA algorithm outperforms existing schemes and is almost the same with the optimal solution in terms of aggregate throughput. Meanwhile, the proposed NSA improves fairness as the scale of the relay network expands.
Magnetic Integration of EMI filter for Grid-Connected Voltage-Source Inverters
Shiqi Jiang,Yitao Liu,Jianchun Peng,Hui Jiang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The magnetic integration method of single-stage and multi-stage electromagnetic interference (EMI) filter was proposed with EE and EIE-type cores for single-phase grid-connected voltage-source inverter (VSI). Common mode (CM) and differential mode (DM) chokes were all integrated into a single magnetic core unit. The effectiveness of integrated single-stage EMI filter (ISSEF) and multi-stage EMI filter (IMSEF) has been verified by simulation and experiments. Taking a 500 W single-phase inverter as an experiment platform, the conducted EMI noise and core temperature distribution were presented. The EMI filter with integrated structure can significantly reduce system volume with satisfied EMI suppression ability.
Weihua Liang,Yitao Liu,Shiqi Jiang,Jianchun Peng,Hui Jiang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The energy stored quasi-Z source cascaded Hbridge (ES-qZS-CHB) inverter is widely used in photovoltaic (PV) power generation system because of its unique advantages. However, the existing researches on ESqZS-CHB inverter PV power system mainly focus on the transmission of active power, but pay little attention to reactive power, causing the ES-qZS-CHB inverter PV power system cannot compensate reactive power or improve system performance. This paper proposes a PV power generation and static synchronous compensator based ESqZS-CHB inverter system, to implement the PV generation and reactive power compensation at the same time. Simulation and experimental results verify the system’s excellent performance.
EMERGENCY COLLISION AVOIDANCE METHOD WITH MOVING OBSTACLES BASED ON PIECEWISE POLYNOMIAL
He Wen,Chen Yong,Liu Gang,Wu Yitao,Liu Yonggang 한국자동차공학회 2023 International journal of automotive technology Vol.24 No.4
As an important part of the advanced driver assistance system (ADAS), the active emergency collision avoidance system can effectively reduce the incidence of accidents. Previously, static obstacle avoidance has been realized by employing piecewise polynomial path planning to improve vehicle stability. However, regarding moving obstacles, the collision avoidance problem becomes more intractable. To address the problem, a novel method based on the technical framework of piecewise polynomial path planning is proposed in this paper to conduct collision avoidance with moving obstacles. First, the Multivariate Gaussian Distribution model is adopted to estimate the velocity of the obstacle ahead, and the longitudinal motion trajectory of the obstacle is calculated. Then, the longitudinal length of the first target path is selected by the rule-based method. Moreover, yielding from the method for static obstacles, the collision avoidance algorithm for moving obstacles is proposed. Finally, the co-simulations are carried out in Simulink/CarSim, of which the results prove that the proposed method can avoid the moving obstacle effectively.
Weijie Chen,Xiuzhu Li,Zhejie Chen,Wei Hao,Peifen Yao,Meng Li,Kunmeng Liu,Hao Hu,Shengpeng Wang,Yitao Wang 고려인삼학회 2022 Journal of Ginseng Research Vol.46 No.1
Ginseng is an international herb that has been used for thousands of years. Two species most commonly applied and investigated in the ginseng family are Asian ginseng and American ginseng. The number of randomized controlled clinical trials (RCTs) has conspicuously increased, driven by the rapid development of ginseng. However, the reporting of RCT items of ginseng is deficient because of different trial designs and reporting formats, which is a challenge for researchers who are looking for the data with high quality and reliability. Thus, this study focused on providing an extensive analysis of these two species and examined the quality of the RCTs, based on the Consolidated Standards of Reporting Trials (CONSORT) guideline. Ninety-one RCTs conducted from 1980 to 2019 that were related to Asian ginseng and American ginseng used singly met our inclusion criteria. We found that the reporting quality of the two species has improved during the past 40 years. Publication date and sample size were significantly associated with the reporting quality. Rigorous RCTs designed for the species of ginseng are warranted, which can shed light on product research and development of ginseng in the future.