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2022 CSAA/IET International Conference on Aircraft Utility systems, AUS 2022

作者： Zhao, Tianyu Wu, Shuai Li, Wending Wang, Yi Fang, Cheng Fu, Junyong Yang, Jiaqiang Li, Chunfang School of Automation Science and Electrical Engineering Beihang University Beijing100006 China Ningbo Institude of Technology Ningbo315832 China Shanghai Aerospace Control Technology Institute Shanghai201109 China Shanghai Servo-system Engineering Research Center Shanghai20110 China Beijing Power Machineries Institution Beijing100074 China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

In this paper, an intelligent position control method based on independent load control is designed for digital electro-hydraulic actuator of rocket nozzle, which can achieve smooth position control of digital electro-hydraulic actuator. According to the requirements of rocket nozzle, the matching design of digital valve set is completed. Combining the independent load characteristics and energy efficiency characteristics of digital valve system, an intelligent research algorithm of position control is improved and put forward. In this paper, a complete digital electro-hydraulic actuator system model of rocket nozzle is established, and the control effect of position control algorithm is verified by simulation algorithm. The simulation results show that, compared with the input amplitude of 100mm, the following error of the system is 0.3mm, which achieves higher control precision and has better rapidity and high-frequency response characteristics. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Position control

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Reliability Evaluation of Distribution Grid Considering Flexible Grid Connection of Distributed Photovoltaic 2

Reliability Evaluation of Distribution Grid Considering Flex...

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2nd International Conference on Electronics, Communications and Information Technology, CECIT 2021

作者： Li, Zecheng Sun, Yanying Feng, Chen State Grid Ningxia Electric Power Research Institute Yinchuan China School of Mechanical Electronic and Information Engineering Beijing100083 China Shandong University The Key Laboratory of Power System Intelligent Dispatch and Control Jinan China

ISBN: (纸本)9781665437578

Aiming at the problem that the flexible access of distributed photovoltaics to the distribution network affects its reliability, this paper establishes a model of the distributed photovoltaic output probability based on the typical output characteristics of distributed photovoltaics firstly. Subsequently, the power grid risk assessment indicators are determined to facilitate the quantification of distribution network risks, including voltage over-limit, power over-limit, and load loss risk indicators. Finally, a distribution network model containing distributed photovoltaic grid-connected is established on the MATLAB simulation platform, and the risk assessment of the distribution network containing distributed photovoltaic grid-connected is carried out. © 2021 IEEE.

关键词： Risk assessment

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Numerical Investigation into the Transient Behavior of the Spike-Type Rotating Stall for a Transonic Compressor Rotor

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Fluid Dynamics & Materials Processing 2022年第3期18卷 761-773页

作者： Pengfei Ju Fangfei Ning Zhiting Tong Jingying Wang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education(Tianjin University of Technology) Tianjin300384China Research Institute of Aero-Engine Beihang UniversityBeijing100191China National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics School of Energy and Power EngineeringBeihang UniversityBeijing100191China School of Energy and Power Engineering Shandong UniversityJinan250061China Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology&Equipment Shandong UniversityJinan250061China

In this paper,a numerical investigation into a spike-type rotating stall process is carried out considering a transonic compressor rotor(the NASA Rotor 37).Through solution of the Unsteady Reynolds-Averaged Navier-Stokes(URANS)equations,the evolution process from an initially circumferentially-symmetric near-stall flow field to a stable stall condition is simulated without adding any artificial *** the near-stall operating point,periodic fluctuations are present in the overall flow of the ***,the blockage region in the channel periodically shifts from middle span to the *** fluctuating condition does not directly lead to stall,while the full-annulus calculation eventually evolves to ***,a kind of“early disturbance”feature appears in the dynamic signals,which propagates forward ahead of the rotor.

关键词： Transonic compressor spike stall numerical simulation early disturbance dynamic signal

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Performance Evaluation of Component-based Mobile Charging and Discharging Facilities Based on Game Theory-Combinatorial Affiliation Functions

Performance Evaluation of Component-based Mobile Charging an...

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Advanced Electrical and Energy systems (AEES), International Conference on

作者： Hua Xia Chen Yang Jianzhou Zhang Xiaoqing Huang NARI Nanjing Control System Co. Ltd. Nanjing China State Grid Electric Power Research Institute Co. Ltd. Nanjing China School of Electrical and Information Engineering Hunan University Changsha China

ISBN: (数字)9798331517724

ISBN: (纸本)9798331517731

With the rapid development of new energy vehicles, an increase in user charging demand has been observed, but the speed of charging pile input has not kept pace with the scale of electric vehicle development. This has led to an increasingly prominent contradiction in charging supply and demand both regionally and temporally. For example, in the service areas of highways, there are fewer charging vehicles on weekdays and not enough piles on holidays. The operational reliability of component-based mobile charging and discharging facilities directly affects the ability to cope with the imbalance in the spatial and temporal distribution of charging demand. Consequently, a performance evaluation method for component-based mobile charging and discharging facilities is proposed. The technical standards of non-vehicle-mounted chargers and dischargers for electric vehicles are analyzed, and a performance evaluation index system for component-based mobile charging and discharging facilities is constructed. The NASH equilibrium game strategy is applied to the combination assignment to obtain the optimal weight allocation coefficients. Subsequently, a combined affiliation function is established to match the actual performance distribution of charging facilities. Finally, the performance evaluation of the charging facilities is conducted, and the results demonstrate that the proposed method aligns more closely with the actual operation state than the traditional comprehensive evaluation method, thereby verifying the reliability and practicability of the method.

关键词： Performance evaluation Road transportation Supply and demand Games Electric vehicles Nash equilibrium Safety Resource management Indexes Standards

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A battery model parameter identification method considering topology reconfiguration

A battery model parameter identification method considering ...

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20th International Conference on AC and DC power Transmission 2024 (ACDC 2024)

作者： Aizuo Chen Yue Quan Yanglin Zhou Ertao Lei Junkun Zhang Song Ci Department of Electrical Engineering Tsinghua University Beijing 100084 People's Republic of China Electric Power Research Institute of Guangdong Power Grid Co. Ltd Guangdong 510080 People's Republic of China State Key Laboratory of Power System Operation and Control Tsinghua University Beijing 100084 People's Republic of China

ISBN: (数字)9781837241552

In the field of battery circuit model parameter estimation, the combination of bilinear transformation with the least squares method has garnered widespread attention due to its excellent performance under continuous current conditions. However, in dynamic reconfigurable battery network (DRBN), the network's topological structure is constantly changing, and the battery current consists of non-periodic pulse signal sequences, making it challenging for traditional methods to accurately estimate the battery model parameters within such networks. To address this issue, this paper proposes a lithium-ion battery circuit model parameter estimation method that takes into account network topology reconfiguration. This method, based on the operational modes and sampling methods of DRBN, derives a new discrete transformation formula for the transfer function and constructs a least squares model parameter identification model using this formula. By establishing an experimental platform for DRBN, the effectiveness of the proposed method is validated in this paper.

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An Economic Scheduling Strategy of Photovoltaic Storage Micro-grid Considering Demand Response

An Economic Scheduling Strategy of Photovoltaic Storage Micr...

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IEEE Asia power and Energy engineering Conference (APEEC)

作者： Rundong Liu Sen Zhang Yincheng Zhao Haojie Ma Luan Chen Weihao Hu Ming Tang Wei Zhan Qingjia Zhou Sichuan Provincial Key Lab of Power System Wide Area Measurement and Control School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu China SPIC Sichuan Electric Power Co. LTD Chengdu China SPIC Southwest Energy Research Institute Chengdu China

ISBN: (数字)9798350373479

ISBN: (纸本)9798350373486

To realize the economic optimization dispatch of PSMG (Photovoltaic Storage Micro-grid), considering the stochastic influence of multiple uncertainties, this study formulates a day-ahead optimal dispatching strategy of PSMG with the minimum comprehensive operating cost as the objective function. Firstly, the source-load uncertainty is dealt with by scenario generation using the Monte Carlo method and k-means clustering algorithm. Then the peak shaving ability of the system is enhanced by the introduction of flexible loads, and the scheduling flexibility of the photovoltaic storage system is increased by the integrated demand response increases the scheduling flexibility of the photovoltaic storage system. Finally, simulation results show that the scheduling scheme can prompt the source-load to participate in peak shaving and valley filling at the same time, increase the new energy consumption capacity of the photovoltaic storage micro-grid, and effectively improve the economic and social benefits of the micro-grid.

关键词： Photovoltaic systems Uncertainty Fluctuations Costs Monte Carlo methods Simulation Demand response

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Case Study of Microgrid Operation in the Context of Environment and Energy Storage

Case Study of Microgrid Operation in the Context of Environm...

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International Conference on power and Energy Technology (ICPET)

作者： Shen Na Li Shuyong Guo Changxin Han Fengqin Cai Haiqing School of Electrical Engineering Guangzhou City University of Technology Guangzhou City China State Key Laboratory of HVDC China Southern Power Grid Electric Power Research Institute Co. Ltd. Guangzhou City China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou City China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

The global energy crisis and environmental crisis have led to the rapid development of new energy, especially in the context of China's dual carbon strategy target in 2020, the next few decades, the new energy industry in China's energy structure will account for an increasingly high proportion. In order to support the realization of the "double carbon" goal, wind power, photovoltaic and other new energy will play an irreplaceable role. However, a large number of new energy sources connected to the power grid will have some impact on the characteristics of the power system. In order to study the operating characteristics of multiple new energy sources connected to the microgrid, this paper builds a microgrid control simulation platform containing various distributed power sources such as solar, wind, small hydropower, thermal voltaic, and energy storage. The simulation platform is used to study the operating characteristics of various new energy sources in different seasons, load changes and storage capacity changes. The results show that the power output of various new energy sources is influenced by environmental factors, especially photovoltaic, wind power and thermal voltages; energy storage capacity also has an impact on the microgrid system. The research results provide theoretical support for the intelligent control and integrated management of microgrid with multiple new energy sources.

关键词： Photovoltaic systems Wind Thermal factors Microgrids Wind power generation Real-time systems Environmental factors Carbon Energy storage Intelligent control

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Study on partial discharge of transformer based on wide frequency equivalent circuit

Study on partial discharge of transformer based on wide freq...

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IEEE International Conference on Energy Internet (ICEI)

作者： Changming Jiang Yuanxiang Zhou Ping Li Yunpeng Tang Zhiyang He Huan Li Jianning Chen Ka Mu North China Branch State Grid Corporation of China Bejing China Department of Electrical Engineering State Key Laboratory of Power System Operation and Control Tsinghua University Bejing China State Grid Corporation of China Bejing China Electric Power Research Institute of State Grid Jibei Electric Power Company Limited Bejing China

ISBN: (数字)9798331523558

ISBN: (纸本)9798331523565

When partial discharge occurs in the transformer, it will produce higher frequency pulse current, high frequency phenomenon will enhance the circuit capacitance effect, making the circuit bandwidth, in order to detect the local discharge signal so as to realize the transformer for equipment monitoring, the establishment of the transformer broadband equivalent circuit model, the propagation law of partial discharge pulse current signal in the transformer is investigated, and the effects of four denoising methods are compared under different evaluation indexes; finally, a typical transformer partial discharge condition is studied, and the validity of the transformer partial discharge research based on the wide-band equivalent circuit is verified.

关键词： Partial discharges Grounding Windings Noise reduction Wavelet packets Frequency measurement Finite element analysis power transformers Integrated circuit modeling Equivalent circuits

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Stability Analysis and Performance Evaluation of Delayed Bilateral Telerobotic systems over a Lossy Communication Channel

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Journal of systems Science & Complexity 2021年第1期34卷 157-179页

作者： BAKHSHI Ali ALFI Alireza TALEBI Heidar Ali SOURATGAR Amir Aboulfazl YOUSEFI Mahdi Faculty of Electrical and Robotic Engineering Shahrood University of TechnologyShahrood 36199-95161Iran Power Plants Control Systems Technology Development Plan Department of monitoring and ControlNiroo Research InstituteTehran 14665-517Iran Real-Time and Robotics system Laboratory Faculty of Electrical EngineeringAmirkabir University of TechnologyHafez AvenueTehran 15914Iran Electrical and Computer Engineering Department The University of British Columbia2385East MallVan couverBC V6T 1Z4Canada

The focus of this paper is to address a novel control technique for stability and transparency analysis of bilateral telerobotic systems in the presence of data loss and time delay in the communication channel. Different control strategies have been reported to compensate the effects of time delay in the communication channel;however, most of them result in poor performance under data loss. First, a model for data loss is proposed using a finite series representation of a set of periodic continuous *** improve the performance and data reconstruction, a holder circuits is also introduced. The passivity of the overall system is provided via the wave variable technique based on the proposed model for the data loss. The stability analysis of the system is then derived using the Lyapunov theorem under the time delay and the data loss. Finally, experimental results are given to illustrate the capability of the proposed control technique.

关键词： Lossy channel passivity stability telerobotic transparency

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Deep Learning Based Fault Diagnosis for Chemical Process with Statistical Feature Fusion

Deep Learning Based Fault Diagnosis for Chemical Process wit...

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Chinese control Conference (CCC)

作者： Lei Zhang Hao Xia Bao Cha School of Control Science and Control Engineering Dalian University of Technology Dalian P. R. China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu P. R. China

The existing fault diagnosis methods based on deep neural networks mostly rely on process data for fault classification and diagnosis, which makes it difficult to distinguish minor faults with similar data features. Therefore, this paper proposes a deep learning-based fault diagnosis model that combines statistical indicators and neural networks. By analyzing and calculating the relevant information entropy to screen the statistical signal features of time domain and frequency domain, we can extract more hidden information from the raw data, and use the convolutional autoencoder to compress the statistical indicators for feature extraction, and use CNN network to extract features from raw data. Finally, the two sets of features are fused and input into the LSTM network to obtain temporal information for fault diagnosis. Tests conducted on the Tennessee Eastman (TE) process show that the proposed model outperforms typical classifiers and improves the diagnostic accuracy of minor faults.

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