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检索条件"机构=StateKey Laboratory of Advanced Electromagnetic Engineering and Technology"

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Centralized control of large capacity parallel connected power conditioning system for battery energy storage system in microgrid

Centralized control of large capacity parallel connected pow...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Jiuqing Cai Changsong Chen Shanxu Duan Dongdong Yang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

This paper presents a centralized control scheme that coordinates parallel operations of large capacity power conditioning system (PCS) for battery energy storage system (BESS) in Micro-grid (MG). The theoretical analysis of the different operation modes are studied, including grid-connected mode, islanded mode and transfer mode. To improve the power sharing accuracy during the islanded operation, a parallel control strategy based on communication network is applied in large-capacity system. Moreover, a novel seamless transfer method is proposed to implement three-phase PCS transition between grid-connected mode and islanded mode. Simulation and experimental results are provided to validate the feasibility of the proposed control strategy.

关键词： Batteries Microgrids Centralized control Power conditioning Inverters Voltage control

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The optimal allocation of D-SMES for enhancing transient stability of power system

The optimal allocation of D-SMES for enhancing transient sta...

引用

IEEE Workshop on advanced Research and technology in Industry Applications (WARTIA)

作者： Shu Wang Yuejin Tang Jing Shi Yajun Xia Kang Gong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781479969906

This paper proposes a method to determine the optimal allocation of distributed superconducting magnetic energy storage system (D-SMES) capacity for enhancing the transient stability of power system. A kind of multi-objective evolutionary algorithm (MOEA) is adopted to find the optimal allocation when a certain number of D-SMES devices are deployed in the certain location of the system. The index of trajectory of generator speed after large disturbance is adopted to indicate the stability of power system. Then, the simulation with the Western Systems Coordinating Council (WSCC) three-machine nine-bus power system is evaluated.

关键词： Power system stability Stability criteria Resource management Evolutionary computation Indexes Transient analysis

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A comparison of contact erosion for two types arcing contact of SF6 circuit breakers in making process

A comparison of contact erosion for two types arcing contact...

引用

IEEE Holm Conference on Electrical Contacts

作者： Can Ding Junjia He Xichao Yuan Zhao Yuan Yuan Pan State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781479960699

The paper presents the results of making tests of arcing contact made from copper-tungsten (Cu-W) composites containing different contents of tungsten: 80% and 85%. The Cu-W arcing contacts are tested in a SF 6 circuit breaker under the condition that the making velocity is 7m/s and the current peak is 18kA. The arcing time of every making test is measured. The electrical properties of the contacts are tested every 20 making operations and the mass loss is investigated after 100 operations. It is determined that the two types of Cu-W contacts have different electrical properties, in other words, their efficacy can be determined for the making as arcing contacts for an SF 6 circuit breaker.

关键词： Contact resistance Sulfur hexafluoride Materials Circuit breakers Surface resistance Voltage measurement

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Investigation of multiphase modular stator SPM with fault tolerance

Investigation of multiphase modular stator SPM with fault to...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Huilin Kang Libing Zhou Jin Wang Xi Peng State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781479951635

Multiphase modular stator permanent magnet machine (MSPM) features fractional slot concentrated windings, negligible mutual phase inductance and thus the high fault tolerance. This paper intends to investigate the fault tolerance of a five phase 20-slot 22-pole MSPM with shaped permanent magnets. The faulty modes include one phase open-circuited, two non-adjacent phases open-circuited, two adjacent phases open-circuited, and one phase short-circuited. Optimal current control strategy is studied and applied to achieve maximum average torque without regard to torque ripple. Finite element analysis is performed to simulate the MSPM with all of the mentioned faulty conditions. Torque characteristics of the MSPM under healthy and faulty modes show that, the MSPM still possesses satisfactory electromagnetic performances in case of the faulty modes.

关键词： Torque Fault tolerance Fault tolerant systems Windings Circuit faults Inductance Current control

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The complex ratio transformer model and its application in magnetic resonant WPT

The complex ratio transformer model and its application in m...

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IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)

作者： Jinbo Zhao Hao Feng Tao Cai Shanxu Duan Qian Dai State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Several Physical models for describing magnetic resonant WPT(wireless power transmission) include coupling-model theory, the leakage inductance model and the mutual inductance model. Among these models, mutual inductance model separates the magnetic coupling coils from each other, simplifying the circuit analysis. But mutual inductance model treats the impact of the secondary side on the primary side as vaguely defined reflective impedance. To equivalently transforming the secondary branch to the primary side, the complex ratio transformer model is established, providing an intuitive physical picture in power transmission process, magnetic resonance (MR) and frequency splitting phenomenon. Finally, the corresponding experimental validation was presented.

关键词： Integrated circuit modeling Magnetic resonance Impedance Inductance Magnetic circuits Couplings

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Study of multiphase modular stator SPM based on phase variable model

Study of multiphase modular stator SPM based on phase variab...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Xi Peng Libing Zhou Jin Wang Huilin Kang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781479951635

Multiphase modular stator surface-mounted permanent magnet machine(MSPM) features non-sinusoidal back electromotive force. As a result, the d-q model of MSPM is not accurate enough due to the ignorance of space harmonics. Phase variable model is able to be used to perform simulation of electric machine with same accuracy level as the full finite element(FE) model with much less simulation time. This paper aims to figure out the difference between the MSPM with conventional permanent magnet(PM) and shaped PM, and the phase variable model is adopted. Rotor-position-dependent variables including inductance, back electromotive force and cogging torque are obtained from FE model. Apparent inductance and incremental inductance are respectively applied to take the saturation effect of the ferromagnetic materials into account. Simulation with phase variable model of MSPM is performed using SIMULINK, and the results show that the MSPM with shaped PM has a better torque characteristic.

关键词： Torque Inductance Harmonic analysis Forging Windings Integrated circuit modeling Stators

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Design and implementation of an electromagnetic clutch system for hub motors

Design and implementation of an electromagnetic clutch syste...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Weiguang Yu Chenglin Gu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Clutch is widely adopted in fuel vehicles, but it is rarely found in in-wheel motor driven electric vehicles. This paper proposes a general formula to solve the electromagnetic force and provides a clutch system for t... 详细信息

ISBN: (纸本)9781479951635

关键词： Coils Magnetic forces Magnetic fields Capacitors Force electromagnetics Permanent magnet motors

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Experimental study on the current-carrying test of metallized electrode

Experimental study on the current-carrying test of metallize...

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IEEE Symposium Power Modulator

作者： Hua Li Bowen Wang Zhijian Xu Zhiwei Li Wenjuan Wang Haoyuan Li Fuchang Lin State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

In this paper, the current-carrying capacity of metalized electrode is studied. The sheet resistance of tested metalized aluminum electrode is 15Ω/□. High-speed camera is applied to record the state of the metalized aluminum electrode under pulsed current. The results show that the metalized aluminum electrode will fracture perpendicular to the direction of current. According to simulation analyses, joule heating and the electrodynamic force induced by magnetic pressure are the main causes for the fracture of metallized electrode.

关键词： Electrodes Films Capacitors Discharges (electric) Metals Resistance Cameras

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Analysis of torque capability and quality in vernier permanent magnet machines

Analysis of torque capability and quality in vernier permane...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Dawei Li Ronghai Qu Jian Li Leilei Wu Wei Xu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781479951635

This paper presents theoretical analysis and comprehensive simulations about average torque and pulsation torque of vernier permanent magnet (VPM) machine. A general torque equation is proposed which is used to analyze torque features and the parameters effect on torque performance of VPM machines in this paper. Based on the general torque equation and finite element algorithm, it is found that smooth torque is the inherent performance of VPM machines. Furthermore, It is demonstrated that the torque density of the VPM machine is larger than that of a regular commercial PM machine by almost 60%. All these advantages demonstrate that the VPM machines can obtain much better steady and dynamic drive performance. In order to validate theoretical analysis, a prototype is built, and more experiments will be available.

关键词： Torque Magnetic flux Harmonic analysis Windings Stator windings Rotors

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A sympathetic inrush detection method based on on-line magnet flux calculation

A sympathetic inrush detection method based on on-line magne...

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International Conference on Power System technology (POWERCON)

作者： Fei Wang Xuanwei Qi Yi Wang Hang Luo Jian Zhang Zhe Zhang Xianggen Yin State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

The sympathetic inrush is a hot issue in the field of differential protection research, due to its characteristic of concealment, diversity, and complexity. The mal-operation of differential protection probably caused by sympathetic inrush is still a difficult problem to be solved. This paper proposed a new sympathetic inrush detection method based on the on-line magnet flux calculating by integrating the measuring voltages on the tips of transformer. This method can completely overcome the negative influence of CT saturation on the differential protection from principle. The EMTDC-based simulation results prove the effectiveness of the proposed method and also verify that this method would not decrease the sensitivity of differential protection under the condition of internal fault.

关键词： Circuit faults Surges Surge protection Magnetic flux Saturation magnetization Voltage measurement

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