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Smart power & Internet Energy Systems (SPIES), International Conference on

作者： Hui-yao Li Wen-jie Zhao Cheng-an Wang Xin-shun Zhou Zhi-po Ji Bo-lin Zhang Beijing Space Power Conversion and Control Engineering Research Center Beijing Spacecrafts Co. Ltd Beijing China

ISBN: (数字)9781728166117

ISBN: (纸本)9781728166124

Based on the problem of non-matching of protective characteristics before and after the use of solid-state power distribution, this paper proposes a stress assessment model in the short-circuit mode of solid-state electronic switch, and realizes the calculation method of transient junction temperature of power semiconductor devices in the short-circuit mode. The parasitic parameters and influencing factors of the solid-state power distribution circuit are analyzed based on the whole satellite state. The solution of the front and back level protection characteristics matching is given to ensure the safety of the solid-state power distribution aerospace application, which has a strong guiding significance and application value.

关键词： Semiconductor device modeling Solid modeling Temperature distribution power distribution Switches Transient analysis Stress

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Analysis on Application of a Current-source Based DFIG Wind Generator Model

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CSEE Journal of power and Energy Systems 2018年第3期4卷 352-361页

作者： Jin Ma Dawei Zhao Liangzhong Yao Minhui Qian Koji Yamashita Lingzhi Zhu School of Electrical&Electronic Engineering North China Electric Power University(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources)Beijing 102206China Renewable Energy Research Center China Electric Power Research Institute(State Key Laboratory of Operation and Control of Renewable Energy&Storage SystemsJiangsu Engineering Technology Research Center for Energy Storage Conversion and Application)Nanjing 210003China Power System Sector Central Research Institute of Electric Power IndustryTokyo 201-8511Japan

Models for simulation are vital for the authenticity of the *** doubly fed induction generation(DFIG)for power system stability analysis has attracted a great deal of research interests in the past few years due to the wide applications of DFIG in wind power *** models developed by the wind generator manufacturers are not only complicated,but also proprietary and very specific to their own *** simplified generic models have been *** them,the current-source based model is most widely used for power system stability *** validation work on this model so far has been based on the selected simulation scenarios or limited real ***,there has been no systematic and theoretic analysis on the validity of the current-source based model,which may cause inappropriate applications of this type of model in real engineering *** paper presents the conditions for using the current-source based model for power system stability analysis;then examines the model’s validity under symmetrical and asymmetrical fault *** practices for modeling and validating a real wind farm in North China confirm the validity analysis of this work on the current-source based DFIG model.

关键词： Applicationanalysis current-source doublyfed induction generation(DFIG) modelvalidation

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research on Active Disturbance Rejection control technology of Two-wheel Self-balancing Robot

Research on Active Disturbance Rejection Control Technology ...

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Electrical engineering and control Technologies (CEECT), Conference on

作者： Wenyang Liu Bo Zhang Shuai Guo Junbiao Shi Mingming Ji Sha Zheng dept.Beijing Spacecraft China Technology Corporation Control Engineering Aerospace Science and Beijing Space Power Conversion Research Center Beijing China

The two-wheel self-balancing robot has the advantages of small size and flexible operation, but it is an inverted pendulum system with electromechanical integration, which has the characteristics of nonlinearity, strong coupling, and many random disturbances. The overshoot returns to the equilibrium point. In this paper, an active disturbance rejection control method combining a PD controller and linear extended state observer is studied, and the simulation analysis and verification experiment of this control system are carried out. The experimental results show that the control system can estimate the external disturbance, so that the self-balancing robot can quickly track to the equilibrium position without overshooting, and has strong robustness and anti-interference ability.

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The Design of Low Voltage Multi-channel Sequential Output space Borne power Supply

The Design of Low Voltage Multi-channel Sequential Output Sp...

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Electrical engineering and Automation (IFEEA), International Forum on

作者： Zhiqi Huang Pengfei Xie Mingming Ji Zhongyang Hu Beijing Spacecrafts Co. Ltd. Beijing Space Power Conversion and Control Engineering Research Center Beijing China

spacecraft is a large system composed of multiple units, all of which need a dedicated power supply. Based on the research background of miniaturized, light weight and high efficiency spacecraft, the low voltage multi-channel sequential output power supply with high reliability and high efficiency is designed in this paper. The traditional space borne power supply employs direct conversion to convert the on-board bus voltage into the voltage required by the load. Due to the large voltage transfer ratio (100), the single-stage converter is difficult to achieve high efficiency, high precision, good load regulation rate and good cross regulation rate. In order to solve the problem, this paper introduces a design method of two-stage converter, which realizes high efficiency, small volume, ultra-low voltage and multi-channel sequential output [1] .

关键词： space vehicles Electrical engineering Low voltage Automation power supplies Design methodology Reliability engineering

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research on Magnetic Integration technology of Half-Bridge Converter for Aerospace Application

Research on Magnetic Integration Technology of Half-Bridge C...

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Electrical engineering and control Technologies (CEECT), Conference on

作者： Shubo Zhi Qi Tang Jianping Wang Xingzheng Pei Xiaofeng Zhang Mingming Ji Beijing Spacecrafts Manufacturing Factory Beijing Space Power Conversion and Control Engineering Technology Research Center Beijing China Beijing Institute of Spacecraft System Engineering Beijing China

This paper presents magnetic integration provides an accurate method for the fully utilizing the magnetizing curves of several magnetic components by integrating into one magnetic core in order to achieve a lighter and smaller converter. This paper aims to put forward a method which can apply the magnetic integration into the DC-DC converter with half-bridge topology in the aerospace. This paper has fully utilized the magnetic integration into the analysis of converters in the working stages and the following established magnetic circuit model. An engineering prototype based on aerospace-grade components is developed. Then, the problems existed in the practical application of magnetic integration into the DC-DC converter in the aerospace are discussed and the related solutions are put forward. As a result, the experimental results of the engineering prototype proves the feasibility of the solutions raised in this paper.

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Fault Section Location Method for Distribution Network Based on Characteristic Coefficient Matrix 10th

Fault Section Location Method for Distribution Network Based...

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10th Frontier Academic Forum of Electrical engineering, FAFEE 2022

作者： Tu, Chunming Liu, Chenxin Xiao, Fan Gun, Qi Ge, Pingjuan National Electric Power Conversion and Control Engineering Technology Research Center Hunan University Changsha410082 China State Grid Hunan Electric Power Corporation Limited Changsha Power Supply Company Changsha410015 China

ISBN: (纸本)9789819934034

Aiming at the problems that the existing fault location methods for distri-bution network with hybrid lines have poor adaptability of section location, a fault location method for distribution network with hybrid lines based on characteristic coefficient matrix is proposed. Firstly, the distribution network topology is analyzed to select reference nodes, and the inherent coefficient matrix is constructed based on the transmission characteristics of the line. Then, the difference between the coeffi-cient matrix before and after the fault is calculated to establish a fault discrimination matrix, and the fault section is determined according to the element distribution of the discrimination matrix. The simulation results show that the proposed method is simple and reliable, can accurately locate the fault location, and effectively improves the practicability of the distribution network fault location system. © beijing Paike Culture Commu. Co., Ltd.

关键词： Location

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A Novel DC power Flow controller for HVDC Grids with Different Voltage Levels 8

A Novel DC Power Flow Controller for HVDC Grids with Differe...

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8th International power Electronics Conference, IPEC-Niigata - ECCE Asia 2018

作者： Wu, Yarnan Ye, Han Chen, Wu He, Xiaokun State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Beijing China Center for Advanced Power-Conversion Technology and Equipment School of Electrical Engineering Southeast University Nanjing China

ISBN: (纸本)9784886864055

As direct current transmission (HVDC) has been improving rapidly, the power flow control of which is increasingly popular and can be realized by the DC power flow controller. In this paper, a novel DC power flow controller (DCPFC) is proposed with the advantages of simpler strategy, little side effect on direct current system, no auxiliary power source and wide applications. A simulation model with two different DC grids was built in the software PLECS, where the performance of the proposed controller was tested. As a consequence, the simulation results show that the proposed DCPFC would have great performance and prospect. © 2018 IEEJ Industry Application Society.

关键词： controllers

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Virtual inertia control strategy of doubly-fed induction generator with additional inertia and damping torque 3

Virtual inertia control strategy of doubly-fed induction gen...

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3rd International Conference on New Energy and Future Energy System, NEFES 2018

作者： Ren, Q.Y. Qian, M.H. Zhu, C.L. Zhao, D.W. Liu, H.M. Zhu, L.Z. Li, G.J. College of Energy and Electrical Engineering Hohai University Nanjing211100 China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing China

Doubly-fed induction generator (DFIG) with dual Pulse-Width Modulation (PWM) converter cannot maintain the active power balance or voltage stability of the power grid self-synchronously because of lacking mechanical inertia and mechanical damping. The virtual synchronous generator (VSG) technology can help solve this problem through simulating the mechanical equation and electromagnetic equation of synchronous generator to control the grid-connected converter. However, under the common first-order virtual inertia link used in the VSG control scheme, while DFIG providing active power support, there exists second frequency dip and the rotor speed recovers slowly, which is not conducive for DFIG to provide continuous and effective virtual inertia support. In order to overcome the drawbacks as well as avoid second frequency dip, this paper puts forward a virtual inertia control strategy of DFIG with additional inertia and damping torque. The additional torque is achieved by proportional-derivative (PD) controller with rotor slip as an input signal. Simulation results on DIgSILENT/powerfactory platform show that the proposed control strategy is effective to reduce frequency deviation and recover the rotor speed faster without second frequency dip phenomenon. © Published under licence by IOP Publishing Ltd.

关键词： Synchronous generators

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An Optimization Method for Multi-loop Transient Performance Suitable for Multi-module Expansion 26

An Optimization Method for Multi-loop Transient Performance ...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Zhang, Yi Zhang, Donglai Fan, Yunhan Wan, Qian Liu, Qing Wang, Shaolin Power Electronics and Motion Control Research Center Shenzhen China Unit 61655 the People's Liberation Army Chongqing China Shenzhen Aerospace New Power Technology Co. Ltd Department of Aerospace Power Shenzhen China Beijing Institute of Spacecraft System Engineering China Academy of Space Technology Beijing China

ISBN: (纸本)9798350317589

With the increase of power utilization rate of renewable energy systems and the profound studies of DC microgrids, DC distribution systems are getting more attention. To improve the quality of DC bus, it is necessary to consider the voltage fluctuations caused by loop switching such as battery management and maximum power output in the system. An optimization method is proposed to accelerate the switching process of multiple control loops, especially for multi-module expansion, which can improve the performance of dynamic response The proposed method just requires the addition of a few devices to the circuit structure and realizes nonlinear control, with which the conditional intervention only happens during transient processes without affecting the steady-state loop design. Compared with traditional methods, this method can achieve power expansion of the system as well as a quick response under load step or bus voltage overshoot. © 2023 IEEE.

关键词： Renewable energy resources

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Consensus-based Optimal control Strategy for Multi-microgrid Systems with Battery Degradation Consideration

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CSEE Journal of power and Energy Systems 2024年第5期10卷 1911-1924页

作者： Tonghe Wang Hong Liang Bo He Haochen Hua Yuchao Qin Junwei Cao Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Meihua Holdings Group Co. Ltd.Langfang 065001China. Department of Astronautical Science and Technology Space Engineering UniversityBeijing 101416China College of Energy and Electrical Engineering Hohai UniversityNanjing211100China Department of Applied Mathematics and Theoretical Physics University of CambridgeCambridgeCB30WAUK. Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China

Consensus has been widely used in distributed control,where distributed individuals need to share their states with their neighbors through communication links to achieve a common ***,the objectives of existing consensus-based control strategies for energy systems seldom address battery degradation cost,which is an important performance indicator to assess the performance and sustainability of battery energy storage(BES)*** this paper,we propose a consensusbased optimal control strategy for multi-microgrid systems,aiming at multiple control objectives including minimizing battery degradation *** consensus is used to synchronize the ratio of BES output power to BES state-of-charge(SoC)among all microgrids while each microgrid is trying to reach its individual *** order to reduce the pressure of communication links and prevent excessive exposure of local information,this ratio is the only state variable shared between *** our complex nonlinear problem might be difficult to solve by traditional methods,we design a compressive sensing-based gradient descent(CSGD)method to solve the control *** simulation results show that our control strategy results in a 74.24%reduction in battery degradation cost on average compared to the control method without considering battery *** addition,the compressive sensing method causes an 89.12%reduction in computation time cost compared to the traditional Monte Carlo(MC)method in solving the control problem.

关键词： Battery degradation compressive sensing consensus distributed control multi-microgrid

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