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Multi-Stage Voltage Control Optimization Strategy for Distribution Networks Considering Active-Reactive Co-Regulation of Electric Vehicles

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Energy Engineering 2025年第1期122卷 221-242页

作者： shukang lyu Fei Zeng Huachun Han HuiyuMiao Yi Pan Xiaodong Yuan Electric Power Research Institute State Grid Jiangsu Electric Power Co.Ltd.Nanjing211103China

The high proportion of uncertain distributed power sources and the access to large-scale random electric vehicle(EV)charging resources further aggravate the voltage fluctuation of the distribution network,and the existing research has not deeply explored the EV active-reactive synergistic regulating characteristics,and failed to realize themulti-timescale synergistic control with other regulatingmeans,For this reason,this paper proposes amultilevel linkage coordinated optimization strategy to reduce the voltage deviation of the distribution ***,a capacitor bank reactive power compensation voltage control model and a distributed photovoltaic(PV)activereactive power regulationmodel are ***,an external characteristicmodel of EVactive-reactive power regulation is developed considering the four-quadrant operational characteristics of the *** optimization model of the distribution network is then constructed considering the time-series coupling constraints of multiple types of voltage regulators.A multi-timescale control strategy is proposed by considering the impact of voltage regulators on active-reactive EV energy consumption and PV energy ***,a four-stage voltage control optimization strategy is proposed for various types of voltage regulators with multiple time ***-objective optimization is solved with the improvedDrosophila algorithmto realize the power fluctuation control of the distribution network and themulti-stage voltage control *** results validate that the proposed voltage control optimization strategy achieves the coordinated control of decentralized voltage control resources in the distribution *** effectively reduces the voltage deviation of the distribution network while ensuring the energy demand of EV users and enhancing the stability and economic efficiency of the distribution network.

关键词： Electric vehicle(EV) distribution network multi-stage optimization active-reactive power regulation voltage control

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新型双层串联混合永磁记忆电机设计优化与特性分析

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中国电机工程学报 2022年第24期42卷 9042-9052页

作者：阳辉王逸贤郑昊吕舒康林鹤云东南大学电气工程学院江苏省南京市210096

为了解决传统串联磁路型混合永磁记忆电机存在的调磁范围受限、调磁电流幅值较高等问题,提出一种新型双层串联永磁记忆电机(dual-layer PM variable flux memory machine,DLPM-VFMM),并针对其设计优化与电磁特性进行研究。首先,基于VFM... 详细信息

为了解决传统串联磁路型混合永磁记忆电机存在的调磁范围受限、调磁电流幅值较高等问题,提出一种新型双层串联永磁记忆电机(dual-layer PM variable flux memory machine,DLPM-VFMM),并针对其设计优化与电磁特性进行研究。首先,基于VFMM特性提出一套多目标设计优化流程,以确定电机初始尺寸;进一步利用有限元对整个电机模型进行参数化建模,并针对VFMM调磁能力及负载稳磁等特殊性能需求,实现参数的相关性分析以及多目标优化设计。在筛选出综合性能较好的模型参数后,分析对比单双层串联混合永磁VFMM的电磁性能。最后,制作DLPM-VFMM样机,并完成实验验证。

关键词：双层永磁串联磁路记忆电机电磁设计多目标优化

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Hybrid partial least squares and neural network approach for short-term electrical load forecasting

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控制理论与应用（英文版） 2008年第1期6卷 93-96页

作者： shukang YANG Ming LU Huifeng XUE College of Automation Northwestern Polytechnical University Xi＇an Shanxi 710072 China

Intelligent systems and methods such as the neural network （NN） are usually used in electric power systems for short-term electrical load forecasting. However, a vast amount of electrical load data is often redundant, and linearly or nonlinearly correlated with each other. Highly correlated input data can result in erroneous prediction results given out by an NN model. Besides this, the determination of the topological structure of an NN model has always been a problem for designers. This paper presents a new artificial intelligence hybrid procedure for next day electric load forecasting based on partial least squares （PLS） and NN. PLS is used for the compression of data input space, and helps to determine the structure of the NN model. The hybrid PLS-NN model can be used to predict hourly electric load on weekdays and weekends. The advantage of this methodology is that the hybrid model can provide faster convergence and more precise prediction results in comparison with abductive networks algorithm. Extensive testing on the electrical load data of the Puget power utility in the USA confirms the validity of the proposed approach.

关键词： Electric loads Forecasting Hybrid neural networks model

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Thermal analysis of high speed permanent magnetic generator

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Science China(Technological Sciences) 2012年第5期55卷 1419-1426页

作者： LI WeiLi ZHANG XiaoChen CHENG shukang CAO JunCi ZHANG YiHuang School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

High-speed permanent magnetic generators (HSPMG) are common and important power generation equipments used in distributed generation systems. A 100 kW level HSPMG is investigated in this paper, and it is fluid-thermal coupling analyzed. The transient 2D electromagnetic field while machine is under rated operating is analyzed by using the time-stepping FEM, from which the electromagnetic performances and the loss distributions are obtained. Then, an analysis model for fluid-solid temperature field analysis is established. Taking losses as the distributed heat sources, the 3D thermal field is coupling calculated. The variations of heat transfer coefficient and temperature of fluid in stator grooves along the axial direction, as well as the whole region 3D temperature distribution in HSPMG are obtained. Then, considering the variations of heat sources distributions and heat transfer conditions, 3D temperature fields of HSPMG operating under different speeds are calculated, and the influences of machine operating speed on the HSPMG thermal performance are studied, based on which, the functions of machine temperature with operating speed and stator windings resistance are proposed. The obtained conclusions may provide a useful reference for the design and research of HSPMG.

关键词： high-speed permanent magnetic generator electromagnetic fluid temperature speed

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Safety-Critical Trajectory Tracking for Mobile Robots With Guaranteed Performance

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IEEE/CAA Journal of Automatica Sinica 2024年第9期11卷 2033-2035页

作者： Wentao Wu Di Wu Yibo Zhang shukang Chen Weidong Zhang Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Department of Information and Communication Engineering Hainan UniversityHaikou 570288China

Dear Editor,This letter considers a collision-free trajectory tracking problem for performance-guaranteed mobile robots(MRs)subject to *** propose a safety-critical performance-guaranteed trajectory tracking method based on control barrier functions(CBFs).First,an auxiliary system is established to generate the non-negative signals for inflexible bounds such that the performance constraints are not violated when avoiding obstacles.

关键词： constraints bounds collision

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War and liar:a semiotic account of metaphors in the reports on the discharge of Fukushima nuclear-contaminated water in Chinese media

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Language and Semiotic Studies 2024年第3期10卷 437-459页

作者： shukang Li Zihan Chen Shandong University JinanChina Soochow University SuzhouChina

The release of nuclear wastewater by Japan has generated strong opposition from Japanese citizens,governments of neighboring countries,and global environmental ***,representing the concerns of neighboring countries,has underscored the illicit and detrimental nature of this *** study explores the metaphors employed in Chinese media regarding the discharge of Fukushima nuclear-contaminated *** on the self-built corpus,we reveal the rhetorical motives underlying the metaphors,drawing on the framework of critical metaphor *** study centers on two major metaphors-war and liar metaphors-in the discourse of two Chinese official media,China Daily and People’s Daily *** is found that according to Chinese media,initiating and protesting the discharge of Fukushima nuclear-contaminated water is a war;and that the Japanese government and TEPCO are *** metaphor choices reflect China’s stance of opposition and condemnation against the discharge and its intention of uncovering deceptive and misleading information.

关键词： metaphor Critical Metaphor Analysis Fukushima nuclear water discharge Chinese media

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The General Configuration of CEV1 Electric Vehicle's Electrical System and the Design of Its Control Sequence

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High Technology Letters 2001年第2期7卷 83-86页

作者：崔淑梅 Qiu Changhua Ge Xin CHENG shukang Dept of Electrical Engineering Harbin Institute of Technology Harbin 150001Harbin Engineering University Harbin Engineering University Dept of Electrical Engineering Harbin Institute of Technology

The configuration an electric vehicle's electrical system and its control sequence design scheme was discussed. Vehicle management unit (VMU), power management unit (PMU) and battery management unit (BMU) were used as the control units in the vehicle. VMU was used as master control unit, PMU was used as the traction control unit and BMU was used as battery management unit. The concentrated single module control was found to be on one of its configurations.

关键词： Electric vehicle Electrical system Sequence control

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Study on DeviceNet communication mechanism and its application in protection measurement and control system

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High Technology Letters 2007年第1期13卷 1-5页

作者：佟为明 Li Zhongwei Sun Fanjin Cheng shukang Department of Electrical Engineering Harbin Institute of Teehnology Harbin 150001 P.R. China Marine Engineering College Dalian Maritime University Dalian 116026 P. R. China

To fit in with the developing requirement of int and communication of protective relays, a protection egrated functions of protection measurement, control measurement and control system based on DeviceNet fieldbus is designed. The communication mechanism of DeviceNet is studied and data trigger modes, communication connection, message types and other key technologies are analyzed. The object modeling and device description of the device are realized too. Results of network test, dynamic simulation and test in the field indicate that this system can accomplish all the communication tasks in real time and can make precise response to every kind of faults of the motor, transformer, line and capacitor. Moreover, this system has higher measurement precision and better control capability.

关键词： communication mechanism protection measurement and control system fieldbus DeviceNet

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A New Oogenus of Dendroolithidae from the Late Cretaceous in the Quyuangang Area,Henan Province,China

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Acta Geologica Sinica(English Edition) 2019年第2期93卷 477-478页

作者： HE Qing ZHANG shukang XING Lida JIANG Qin AN Yanfei YANG Sen School of Resources and Environmental Engineering Anhui University Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences School of the Earth Sciences and Resources China University of Geosciences

Objective The oofamily Dendroolithidae is elliptical or oblate eggs with loosely arranged dendritic eggshell units and large cavities between eggshell units (Zhang et al., 2018).Dendroolithidae is represented by two oogenera,Dendroolithus (Zhao Zikui and Li Zuocong, 1988), and Placoolithus (Zhao Hong and Zhao Zikui, 1998)according to the latest classification (Zhang et al., 2018).

关键词： New Oogenus the Late Cretaceous Henan Province

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Partial Discharge Characteristics in the Course of Aging within XLPE Insulation

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Wuhan University Journal of Natural Sciences 2006年第2期11卷 389-393页

作者： WANG Hongxin CHENG shukang WEN Xishan FU Duan School of Electrical Engineering Wuhan University Wuhan 430072 Hubei China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 Heilongjiang China

This paper deals with the experimental study on the correlation between partial discharge （PD） characteristic parameters and corresponding aging degree of insulation in the course of the aging within eros,s-linked polyethylene （XLPE） insulation. The aging tests were performed on a section of 10 kV transmission cable by means of water needle method. The PD macroscopic characteristic parameters were found to be significantly dependent on the corresponding aging degree of insulation in the course of aging of XLPE, and different kind of aging stage has different characteristics. Beside, there are similar regularity but different PD amplitude in the course of aging of *** insulation in different electrolyte, and their insulation life is different. Therefore, according to the chan ging regularity of the PD macroscopic characteristic parame ters within XLPE insulation judging the aging degree of XLPE insulation will be an effective method.

关键词： cross-linked polyethylene aging partial discharge

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