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April 10, 2018
March 20, 2018
April 16, 2018
April 20-22, 2018
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Dr. Chongwei Zheng, Navigation Department, Dalian Naval Academy, China
Title: Marine new energy and environment of the 21st Century Maritime Silk Road
The 21st Century Maritime Silk Road represents China’s consistent theme of peace and development, which is conducive to the common prosperity of human society. However, challenges and opportunities often coexist. The Maritime Silk Road involves a large number of countries and a wide range. The challenging natural environment, scarcity of electricity and freshwater resources greatly increase the difficulty of constructing the Maritime Silk Road. For example, a storm surge in the Bay of Bengal in 1970 caused more than 300,000 deaths. In addition, with shortages of conventional energy, the rational development of marine new energy will be a new highlight of the Maritime Silk Road. Obviously, understanding the characteristics of the marine environment and marine energy is a basis for the order, safe and efficient construction of the Maritime Silk Road. Previous researches have made great contribution to the analysis of marine environment and marine energy of the global oceans. Due to the extremely scarce data and the difficulty of using the appropriate technology, there is little research on the Maritime Silk Road, which is urgently needed.
Firstly, we analyzed the climate characteristics of wave energy and offshore wind energy of the Maritime Silk Road, especially several key points (such as the Gwadar port, Sri Lanka and other important remote islands and reefs). Then we also proposed a short-term forecasting scheme and a long-term prediction scheme of wave energy for the Maritime Silk Road. There are many researches on the short-term forecasting and long-term prediction of the oceanic parameters. However, the short-term forecasting and long-term prediction of the marine new energy is scarce, which is urgently needed for the daily operation and long-term planning of wave/wind energy development. We realize this work for the first time. In addition, the traditional wind/wave energy classification schemes consider only partial energy factors. We proposed a new energy classification scheme that incorporates a comprehensive consideration of energy factors, environmental risk factors, and cost factors is proposed, which is closely related to provide reference for both macro- and micro-scale classifications of new ocean resources on the Maritime Silk Road. Based on the above analysis, a marine new energy big data regarding the Maritime Silk Road is built for the first time. We hope to make positive contribution to ease the energy crisis, improve the quality of life of residents along the Maritime Silk Road, and enhance the viability of remote islands and reefs, etc. We also analyzed the wind climate, wave climate and so on, to service for the safe and efficient implementation of the Maritime Silk Road.
Based on the above analysis, we write a series publication on the 21st Century Maritime Silk Road, including 8 English books are accepted by Springer. We hope our work can provide scientific reference for decision-maker, researchers and engineers involving in the construction of the Maritime Silk Road.
Invited Speeches(1) Cheng Liang, Nanjing Normal University, China
Title: Model Predictive Control of LCL Three-level Photovoltaic Grid-connected Inverter
Abstract: In this paper, neutral point clamped three-level inverter circuit is analyzed to establish a mathematical model of the three-level inverter in the αβ coordinate system. The causes and harms of the midpoint potential imbalance problem are described. Use the method of model predictive control to control the entire inverter circuit. The simulation model of the inverter system is built in Matlab/Simulink software. It is convenient to control the grid-connected current, suppress the unbalance of the midpoint potential and reduce the switching frequency by changing the weight coefficient in the cost function. The superiority of the model predictive control in the control method of the inverter system is verified.
(2) Tongtong Geng, Lanzhou University of Technology, China
Title: Degradation mechanism of LiMn2O4 cathode at high charge cut-off voltages
Abstract: Degradation mechanism of LiMn2O4 cathode at high cut-off voltage of 4.8V is investigated. Electrochemical tests of cathode show rapid capacity loss due to the oxidation of the electrolyte and the generation of oxygen species under high voltage operation leading to the increase of electrode resistance. In addition, a thick layer is found on the cathode surface from scanning electron microscope. The thickness of it increases with the augment of charge potentials.
(3) Fengfeng Peng, Lanzhou University of Technology, China
Title: Study on High Temperature Film Formation of LiBOB Electrolyte Salt
Abstract: In this paper, the performance of film-forming with LiBOB-SL / DMS electrolyte at high temperature (SEI film) was studied by assembling Li / MCMB battery. The impedance behavior and SEI film were studied at different temperatures. It suggests that LiBOB-SL/DMS is an excellent electrolyte system to form a solid electrolyte interphase.
(4) Baobing Pang, Nanjing Normal University, China
Title: Research on Secondary Frequency Control Strategy for Islanded Microgrid
Abstract: In view of the fact that the primary control has a steady-state frequency difference, this paper aims at the rapidity and economy of isolated microgrid frequency modulation, and proposes a secondary frequency control strategy for islanding microgrid based on distributed control. In order to verify the reliability of the strategy, the correctness and effectiveness of the proposed frequency modulation strategy were verified by Matlab/Simulink simulation analysis.