Yutian Sun

East China Normal University

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J. C. Han

Harbin University of Science and Technology

Baojun Ge

Harbin University of Science and Technology

Zheng Ping

Harbin Institute of Technology

Dajun Tao

Harbin University of Science and Technology

Ye Shan

China Institute of Atomic Energy

Xiaoming Zhou

Beijing Institute of Technology

Pengying An

East China Normal University

Yuan Cheng

Westlake University

Jibin Zou

Harbin Institute of Technology

Likun Wang

Beijing Information Science & Technology University

Cooperative Institutions

Harbin University of Science and Technology

Harbin Electric Corporation (China)

East China Normal University

Harbin Institute of Technology

New York University Shanghai

Chinese Academy of Sciences

Peking University

North China Electric Power University

State Grid Corporation of China (China)

Tianjin University

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Vibration Analysis and Suppression of Megawatt Permanent Magnet Generator

2022 4th Asia Energy and Electrical Engineering Symposium (AEEES) (2024)

Yu Hong‐hao Yutian Sun Jibin Zou Jin Huiyong

The megawatt permanent magnet generator has emerged as the fundamental power supply equipment for marine power generation systems. Effectively mitigating its vibration noise standed out as one of the most crucial challenges in motor design. Current research primarily focused on optimizing the electromagnetic structure and enhancing control strategies for permanent magnet generators. In this study, a novel connection structure with radial elasticity and axial rigidity is proposed to effectively alleviate the impact of stator core vibrations on the stator frame. A 2.7MW permanent magnet generator was taken as an example, electromagnetic forces and vibrations generated by it are initially calculated through analysis, and the reliability of this calculation method is verified by comparing it with experimental data. Subsequently, the prototype incorporates the special connection structure, and its effectiveness is confirmed through comparison with vibration analysis results.

10.1109/aeees61147.2024.10544617

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The influence of reclosure of single-phase system fault on pumped-storage machine

International Conference on Electrical and Control Engineering (2011)

Jinxiang Li Bo Lan Yutian Sun Guifen Li

In modern power system, reclosing operation of single phase fault is commonly employed in order to improve operating stability and reliability. However, the successive electrical transients caused by system faults and subsequent switching operations give rise to mechanical stresses nearby electric machines. These stresses may exceed the endurance limit of certain machine parts and bring about slight and severe fatigue damage which is cumulative over the life of machines. In this paper, the sophisticated simulation model, including an infinite grid, lines, breakers, transformers, synchronous machines and mechanical shaft systems etc., is established to identify an interaction between system and machines. A line to ground fault and the single-phase-reclosing processes (SPRP) are simulated for both generator and motor conditions of pumped storage machine (PSM). Electric-magnetic torque characteristics and stator current curves are given. The whole stresses of stator core and frame are calculated by FEM and fatigue loss is predicted. The results show that although there is some fatigue in parts, the impact of SPRP on PSM is acceptable. Thus, the structure of machines can be optimized, and an operating guidance will be achieved to SPRP of PSM.

Electric machine

10.1109/iceceng.2011.6058314

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Citations (1)

Power Distribution Strategy for an Electric Bus with a Hybrid Energy Storage System

World Electric Vehicle Journal (2021)

Yu Zhang Kai Li Shumei Cui Yutian Sun

To address the power distribution problem that occurs in hybrid energy storage systems (HESSs) in electric vehicles, a fuzzy control distribution method is proposed in this paper, taking the vehicle demand power; supercapacitor power, PSC;; and lithium battery power, Pbat, as the inputs and the power distribution factor of the supercapacitor as the output to control the power distribution of the composite energy storage system, in addition to dividing the whole working condition into three time scales, namely, long, medium and short. In this study, we conducted a comprehensive analysis and comparison with typical control methods regarding the energy storage element output power, battery state of charge (SOC) change, energy flow diagram and power frequency. The simulation experiment results show that the proposed strategy is more effective in reducing the peak output power of the power battery, improving the effective power utilization rate of HESS and the effective energy utilization rate. In order to further verify the effectiveness of the control strategy, a pure electric bus power system test bench was built based on similar principles, and a representative time period under the driving conditions of the China city bus (CHTC-B) was selected, involving an acceleration process from 30 to 48 s (process 1), a uniform speed process from 636 to 671 s (process 2) and a regenerative braking process from 1290 to 1304 s (process 3), further verifying the effectiveness and feasibility of the proposed control strategy.

State of charge

10.3390/wevj12030154

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Citations (4)

時間ステップ有限要素法を用いた揚水発電機の過渡パラメータの計算法に関する対照研究【Powered by NICT】

Diangong Jishu Xuebao (2015)

Weihua Wang Hongyu Wang Guorui Xu Jinping Kang Yutian Sun

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Prediction of Electromagnetic Characteristics in Stator End Parts of a Turbo-Generator Based on MLP and SVR

Energies (2021)

Likun Wang Yutian Sun Baoquan Kou Xiaoshuai Bi Hai Guo

In order to study the multiple restricted factors and parameters of the eddy current loss of generator end structures, both the multi-layer perceptron (MLP) and support vector regression (SVR) are used to study and predict the mechanism of the synergistic effect of metal shield conductivity, relative permeability of clamping plates and structural characteristics of eddy current losses. Based on the eddy current losses of generator end structures under different metal shielding thicknesses and electromagnetic properties, the calculation accuracy of the MLP and SVR is compared. The prediction method gives an effective means for the complex design of the end region of the generator, which reduces the effort of the designers. It also promotes the design efficiency of the electrical generator.

Turbo generator

Perceptron

10.3390/en14185908

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Summary on Manufacture and Operation of 1000MW Nuclear Power Four-poles Turbogenerator in the Former Soviet Union

Large Electric Machine and Hydraulic Turbine (2010)

Yutian Sun Cui Hong-feng

This paper introduces the nuclear power turbogenerator and steam turbine manufacturers of the former Soviet Union.Related situation about the nuclear power generator manufactured by St.Petersburg Power Factory and Kharkov Heavy Motor Factory is introduced.The stator and rotor structural features,prototype test and mechanical characteristics of ТВВ-1000-4 four-poles turbogenerator manufactured by the Power Factory,are deeply elaborated,and operation of the nuclear turbogenerator is also introduced.

Factory (object-oriented programming)

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Calculation and analysis on eddy current loss of damping bar under asymmetrical operation of 1 000 MW hydro-generator

Yutian Sun

Aiming at the phenomenon that the damping bars would easily fuse under the asymmetrical operation of large hydro-generator,the eddy current loss of damping bars under the asymmetrical operation of a 1 000 MW hydro-generator was further studied on the basis of establishing two-dimensional electromagnetic field-circuit-motion coupled time-stepping finite element model.The influence of such factors as the stator slotting,magnetic pole rotation and stator current on the eddy current loss of damping bars were comprehensively considered.The eddy current loss of each damping bar in one magnetic pole under different operating conditions was accurately calculated,and the change rule of eddy current loss was analyzed.And thus,the influence of the connection mode of damping system as well as the radius and material of damping bar on the eddy current loss of damping bars was discussed.The results indicate that the eddy current loss of last damping bar along the rotation direction is the largest,and the structure parameters of damping system have greater influence on the distribution of eddy current loss of damping bars.

Magnetic damping

Bar (unit)

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Environmental noise degrades hippocampus-related learning and memory

Proceedings of the National Academy of Sciences (2020)

Yifan Zhang Min Zhu Yutian Sun Binliang Tang Guimin Zhang

Significance The noise pollution accompanying industrialization is a risk factor to human health. Here, we show in a rodent model that even moderate-level noise at ∼65 dB SPL that has little effect on stress status can substantially impair hippocampus-related learning and memory by altering the plasticity of synaptic transmission. It is possible that because moderately loud noise does not affect peripheral hearing per se, the negative impacts of chronic exposure to such noise are currently not well characterized. Our results indicate the importance of more thoroughly defining these possibly hitherto unappreciated hazards of noise pollution in modern human environments.

Affect

10.1073/pnas.2017841117

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Citations (48)

Electric bus mechanical charging system based on robots

Xin Wang Yutian Sun

Electric vehicle(EV) which is a potential green vehicle, could solve contaminated problems and resource constraints, and is an important part of strong smart grid. Nowadays EV has three charging methods, such as traditional charging, quick charging and mechanical charging. The last method is the main trend of EV charging methods. In this paper, the skills of mechanical charging are compared and analysed at home and abroad. At the same time, achieves of electric bus mechanical charging system made by Shandong electric power research institute and applications are presented. The development suggestions of EV charging system are proposed finally.

Charging station

10.1109/icecc.2011.6066638

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Design and Analysis of Complex End Region of Pumped Storage Generator Motor Based on Novel Electromagnetic Vector Method

IEEE Transactions on Industrial Electronics (2023)

Jichao Han Yufei Liu Dong Jiechen Xizhao Bian Yutian Sun

A very large end leakage flux is produced by the end winding of a pumped storage generator motor. It has a significant impact on the design, flux density, and temperature in the end region of the pumped storage generator motor. The high temperature makes it difficult to design pumped storage generator motors. To quickly and accurately obtain the flux density of end components, a novel electromagnetic vector method is proposed in this article. A 300-MW pumped storage generator motor is designed. The electromagnetic vector method and finite element method are used to calculate the flux density of the end components, respectively. The obtained results are compared and analyzed. The results reveal that the novel method is more convenient and faster than the finite element method. The novel electromagnetic vector method reduces the design time and calculation time of the end flux density. The flux density and losses of the end components in the pumped storage generator motor are studied under different operating conditions. Three-dimensional fluid and thermal coupled field is calculated and analyzed. Moreover, the calculation results are verified by the experimental values.

Electromagnetics

10.1109/tie.2023.3239915

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Citations (3)