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检索条件"机构=Science and Technology on Ship Integrated Power System Technology Laboratory"

共 390 条记录，以下是61-70 订阅

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Optimal Design of Reactor for 12 Pulse Three-Level Rectifier 16th

Optimal Design of Reactor for 12 Pulse Three-Level Rectifier

引用

16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Zhang, Xiangming Deng, Chen Chen, Junquan Zhao, Zhihua Zhang, Lei National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9789811915314

Based on the analysis of the current characteristics of the DC side of the 12 pulse three-level rectifier, a common-model integrated reactor is proposed to suppress the DC ripple. Through magnetic-circuit coupling, the reactor can enhance the filtering effect of the main harmonic and cancel out the DC main magnetic flux in the core of the reactor, thus greatly reducing the volume, weight and cost of the reactor. Based on the theoretical analysis, a common model integrated reactor is designed and manufactured. The test results show that the proposed method not only ensures the harmonic suppression effect, but also reduces the volume, weight and cost of the reactor by more than 70% compared with the discrete filtering method. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Magnetism

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AN EFFICIENT SWITCHING RIPPLE COMMUNICATION METHOD BASED ON NON-ORTHOGONAL FSK MODULATION 18

AN EFFICIENT SWITCHING RIPPLE COMMUNICATION METHOD BASED ON ...

引用

18th International Conference on AC and DC power Transmission, ACDC 2022

作者： Hu, Anqi Meng, Qingyun Liu, Cang Huo, Dongyang National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (数字)9781839537615

ISBN: (纸本)9781839537615

The well-known PSDM (power/signal dual modulation) technology, which adopts the switching ripples of output voltages as the carriers of information, enables digital communication between power electronic converters without dedicated communication lines. However, the existing FSK (frequency shift keying) and PSK (phase shift keying) modulation methods both have to be carried out under the orthogonality rule, which makes it difficult for the ripple communication rate to reach the Nyquist rate. In this paper, an efficient switching ripple communication method based on non-orthogonal FSK modulation is proposed, which can achieve significantly higher bandwidth efficiency. By solving the correlation matrix equation during demodulation process, one can decode the signals carried by different carrier frequencies, which are not necessarily orthogonal to each other within the demodulation cycle. Some special measures are taken to cope with the symbols of variable lengths. Research shows that, by taking the approach based on non-orthogonal FSK modulation, one can achieve a communication rate of about 2.3 times that of the method based on orthogonal FSK modulation, which can probably exceed the Nyquist rate. Numerical results of random coding and decoding verify the validity of the theoretical method. © ACDC 2022. All rights reserved.

关键词： Demodulation

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Application of Artificial Neural Network in power Electronic Control 16th

Application of Artificial Neural Network in Power Electronic...

引用

16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Zhang, Zhenyu Wang, Guangsen Wang, Kang Wang, Zhiwei National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9789811915314

With the development of power electronic technology, the control object of power electronic becomes more and more complex, which presents the characteristics of time-varying, nonlinear, multivariable coupling, uncertainty and so on. Besides, the power electronic system requires higher and higher control accuracy. All mentioned above make it difficult for the traditional control theory to be directly applied to the modern power electronic control. In contrast, artificial neural network has more and more applications in power electronic control due to its good nonlinear mapping and self-learning ability. This paper gives a comprehensive overview of neural network’ application in power electronic control, introduces the theme from two aspects: types of neural network and its role in power electronic control. The basic principle, improvement, typical application of neural network is described in detail. In addition, the existing problems and possible solutions of neural network’s application in power electronic control are summarized. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Neural networks

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Research on Key Influence Factors of Independent Double Three-Phase Common-Bus Five-Level NPC/H Bridge Inverter DC-Link Capacitor Voltage Fluctuation 1

引用

9th Frontier Academic Forum of Electrical Engineering, FAFEE 2020

作者： Wang, Wei Wang, Guangsen Zhou, Bin Zhang, Zhenyu National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (数字)9789813366060

ISBN: (纸本)9789813366053

This paper aims at the DC-link capacitor voltage fluctuation problem of independent double three-phase common bus five-level NPC/H bridge inverter. Firstly, the topological structure of the research object is described. Secondly, the principle of voltage balance control of the inverter is described, and the objective function characterizing the DC-link capacitor voltage fluctuation is derived, to get the relation between the key factors and the voltage fluctuation. Finally, on the semi-physical real-time simulation platform, the influence laws of each key factor on the capacitor voltage fluctuation are analyzed and summarized, and some suggestions and research directions for the method of voltage balance control are put forward. © 2021, Beijing Oriental Sun Cult. Comm. CO Ltd.

关键词： Simulation platform

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An adaptive cancellation method of wideband co-frequency noise

An adaptive cancellation method of wideband co-frequency noi...

引用

2019 Joint International Symposium on Electromagnetic Compatibility, Sapporo and Asia-Pacific International Symposium on Electromagnetic Compatibility, EMC Sapporo/APEMC 2019

作者： He, Fangmin Qin, Huanding Meng, Jin Li, Yi National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9784885523229

On the co-platform with multi frequency equipment, high-power transmitting equipment would bring wideband co-frequency noise interference to high sensitivity receiving equipment through antenna coupling. Considering the influence of the amplitude and phase dispersion characteristics of the coupled channel, the traditional interference adaptive cancellation method calculates the broadband noise cancellation weight in the interference bandwidth, instead of calculating the cancellation weight in the receiving channel. This paper proposes a new co-frequency noise adaptive cancellation method. By adaptively tracking the frequency of the interfered channel, the method only performs correlation processing on the frequency band covering the broadband of the receiving channel, which can avoid the influence of out-of-channel noise on the weight calculation, and cancel the co-frequency noise interference in the receiving channel accurately and effectively. The simulation shows that this method can accurately obtain the cancellation weights in the interfered channel, avoid the influence of the out-of-channel broadband noise on the cancellation weight, and cancel the co-frequency noise interference effectively. © 2019 The Institute of Electronics, Information and Communication Engineer.

关键词： Antennas

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An Improved Strategy for Modular Multilevel Converter at Low Speed Operation 5

An Improved Strategy for Modular Multilevel Converter at Low...

引用

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering, ACMME 2018

作者： Zeng, Qifan Xiao, Fei Ai, Sheng Ren, Qiang National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

One of the main problems of the Modular Multilevel Converter (MMC) for ship electric propulsion applications is the significant magnitude of capacitor voltage ripple at low speed operation. The commonly used solution is harmonic injection. In this paper, the injection rules are explored through the dynamic relationship of MMC in a comprehensive way, and the harmonic characteristics of injection current are derived. Furthermore, the circulating current controller is modified according to the harmonics of injected current with changing frequency, which reduces the ripple of capacitor voltage effectively in a wide speed range. Simulation results are shown to demonstrate the effectiveness of the proposed method. © Published under licence by IOP Publishing Ltd.

关键词： ships

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A Novel Key-value based Real-time Data Management Framework for ship integrated power Cyber-Physical system

A Novel Key-value based Real-time Data Management Framework ...

引用

2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Shang, Chengya Bao, Xianqiang Fu, Lijun Xia, Li Xu, Xinghua Xu, Chengcheng National Key Laboratory of Science and Technology on Vessel Integrated Power System University of Naval Engineering Wuhan China

ISBN: (纸本)9781728135205

The new generation ship integrated power system (IPS) realizes high level informatization for various physical equipments, and gradually develops to a cyber-physical system (CPS). The future trend is collecting ship big data to achieve data-driven intelligence for IPS. However, traditional relational data management framework becomes inefficient to handle the real-time data processing in ship integrated power cyber-physics system. In order to process the large-scale real-time data that collected from numerous sensors by field bus of IPS devices within acceptable latency, especially for handling the semi-structured and non-structured data. This paper proposes a novel key-value data model based real-time data management framework, which enables batch processing and distributed deployment to acquire time-efficiency as well as system scalable. We implement a real-time data management prototype system based on an open source in-memory key-value store. Finally, the evaluation results from the prototype verify the advantages of novel framework compared with traditional solution. © 2019 IEEE.

关键词： Information management

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Carousel Path Optimization Based on Hybrid Particle Swarm Optimization Algorithm 5

Carousel Path Optimization Based on Hybrid Particle Swarm Op...

引用

5th International Conference on Advanced Electronic Materials, Computers and Software Engineering, AEMCSE 2022

作者： Duan, Jun-Yu Rui, Wan-Zhi Naval University of Engineering National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan China

ISBN: (数字)9781665484749

ISBN: (纸本)9781665484749

In order to improve the efficiency of rotating shelf scheduling, the optimal picking path optimization problem with time interval constraint (MCS-OOIP) is considered, the mathematical model of MCS-OOIP is established, and an improved hybrid particle swarm optimization algorithm is proposed., By introducing the crossover strategy and mutation strategy of genetic algorithm and the acceptance criterion of simulated annealing algorithm, a hybrid particle swarm optimization algorithm for solving MCS-OOIP problem is constructed by combining it with particle swarm optimization algorithm. The simulation results are compared with the simple genetic algorithm, which shows that the algorithm can more effectively solve the MCS-OOIP problem under the single rotating shelf. The research results can be used as a reference for the transportation path optimization of rotary storage system. © 2022 IEEE.

关键词： Genetic algorithms

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Study on Fast-Charging Strategy of High-power Hybrid Energy Storage Source 4

Study on Fast-Charging Strategy of High-Power Hybrid Energy ...

引用

4th IEEE China International Electrical and Energy Conference, CIEEC 2021

作者： Lu, Junyong Liu, Yingquan Long, Xinlin Naval University of Engineering National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan China

ISBN: (纸本)9781728171494

The high-power hybrid energy storage (HES) source is the main pulse power supply of the electromagnetic launch weapons (EMLW). The study of its fast-charging strategy can further improve the response efficiency and combat capability of the weapon system. This paper discusses the limitations in solving the problems of repeatability and fast charging of the EMLW. Based on the overview of the current status of the high-power HES technology, a fast-charging strategy for the "super-capacitor + pulse capacitor"HES is proposed. The circuit simulation model is established, and the simulation results show that this topology can realize the rapid energy transmission of 4.5MJ in 0.2 seconds (average power 22.5MW). On the basis of the simulation research, the advantages, disadvantages and key technical problems of the proposed fast-charging strategy are discussed. The research is of great significance for rapid-firing application of the small EMLW. © 2021 IEEE.

关键词： Circuit simulation

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Optimizing design of multi-coil solenoid HTS magnet by PSO algorithm

Optimizing design of multi-coil solenoid HTS magnet by PSO a...

引用

2018 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2018

作者： Huang, Wen Chen, Jun Quan National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9781538624944

The superconducting magnet has been used more and more widely due to the advances in refrigeration technology and superconducting material. Consequently, its design requirements become higher. This paper combines particle swarm optimization (PSO) and numerical calculation using finite-element (FE) for the rapidly-optimized design of multi-coil solenoid high-temperature-superconducting (HTS) magnet which must satisfy the need of electromagnetism. On this basis, the length of the material used will be minimized. With the optimum design of a magnetic fluid propeller as an example, the second-generation HTS material is selected for developing a superconducting magnet prototype, which is not lower than 6T in central magnetic field strength, not less than 340∗100mm2 in its uniform region and not less than 100mm in diameter. © 2018 IEEE.

关键词： Superconducting magnets

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