检索结果-内蒙古大学图书馆

Annual Conference of Industrial Electronics Society

作者： Jianqiao Zou Wei Xu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Due to the current constraint of linear induction machine (LIM) and voltage constraint of inverter, the output thrust of LIM is limited. So, in order to make LIM output thrust as large as possible within current and voltage limit, firstly, the maximum thrust per ampere (MTPA) is used to achieve maximum thrust with limited current in low speed. Secondly, with the speed of LIM increasing, the voltage limit of inverter has to be considered by the method of field-weakening. And similar to the concept of MTPA, the maximum thrust per volt (MTPV) is deduced for achieving maximum thrust within the voltage constraint of inverter. Finally, the deadbeat control method is applied to LIM for high tracking performance, and both simulation and experiments demonstrate the effectiveness of this proposed control strategy.

关键词： Trajectory Inverters Induction machines Torque Inductance Mathematical model Angular velocity

来源：评论

学校读者我要写书评

暂无评论

Learning from time-synchronized power system measurements with rare anomalous event records to detect PMU data manipulation attacks

Learning from time-synchronized power system measurements wi...

引用

IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Jingyu Wang Dongyuan Shi State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781538614280

PMU data manipulation attacks (DMA) which maliciously modify the synchrophasor measurements in power systems, is an emerging type of cyber-attack aiming to mislead the control center into taking erroneous control actions. Widespread application of PMU produces a vast amount of time-synchronized historical operating data, making it possible to turn to machine learning approaches to detect the attacks. However, anomalous events occur rarely in practice. To construct a balanced training dataset, where normal and anomalous instances need to be evenly extracted and labeled from historical operating records, is sure to cost plenty of human efforts and may introduce uncontrollable experience errors. In this paper, we design a novel detection model with Synthetic Minority Over-sampling TEchnique (SMOTE)-based data augmentation and Edited Nearest Neighbors (ENN)-based data cleaning technique to reconstruct the imbalanced training dataset into a balanced one to train the subsequent XGBoost classifier. Experiments show that although rare anomalous historical event records are needed, our model is still able to effectively detect out DMAs in power systems.

关键词： Phasor measurement units Transmission line measurements Power systems Training Data models Cleaning Classification algorithms

来源：评论

学校读者我要写书评

暂无评论

Model predictive current control of brushless doubly-fed machine for stand-alone power generation system

Model predictive current control of brushless doubly-fed mac...

引用

Annual Conference of Industrial Electronics Society

作者： Wei Xu Jianping Gao Yi Liu Kailiang Yu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

To achieve good steady-state performance and quick dynamic response, one model predictive current control (MPCC) method is proposed in this paper to replace the traditional proportional-integral (PI) controller to regulate the control winding (CW) current of brushless doubly-fed machine (BDFM) for stand-alone power generation system. The MPCC is developed based on the unified reference frame dq model of the BDFM. Simulations under several typical conditions are carried out to verify the effectiveness of MPCC. It is proven that MPCC can get a better CW current response than PI controller and can produce better effects on the output voltage of power winding (PW). Besides, MPCC is simpler than PI current control loop, because no parameters need to be tuned for MPCC.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The Construction of Plasma Density Feedback Control System on J-TEXT Tokamak

引用

Plasma Science and technology 2016年第2期18卷 211-216页

作者：柯新陈志鹏巴为刚舒双宝高丽张明庄革 State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and Technology School of Instrument Science and Opto-Electronics Engineering Hefei University of Technology

The plasma density feedback control system（PDFCS） has been established on the Joint Texas Experimental Tokamak（J-TEXT） for meeting the need for an accurate plasma density in physical *** consists of a density measurement subsystem,a feedback control subsystem and a gas puffing *** to the characteristic of the gas puffing system,a voltage amplitude control mode has been applied in the feedback control strategy,which is accomplished by the proportion,integral and differential（PID） *** this system,the quantity calibration of gas injection,adjusted responding to the change of the density signal,has been carried *** experimental results are shown and discussed.

关键词： density feedback control tokamak PID

来源：评论

学校读者我要写书评

暂无评论

Power system joint energy and reserve scheduling model considering variable speed pumped hydro storage for mitigating wind curtailment

引用

IOP Conference Series: Earth and Environmental Science 2019年第1期354卷

作者： T T Zheng Y W Li P W Yang X L Chen R Zheng S H Miao H Ji H R Yin State Grid East Inner Mongolia Electric Power Company Limited Electric Power Research Institute Hohhot 010020 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key Laboratory School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

The large-scale integration of wind power brings great challenges to power system secure and economic operation. In order to address this challenge, the variable speed pump storage hydropower plant (VS-PSHP) technology and demand response technology have addressed a lot attention. In this paper, the coordination of the thermal power generator, the wind power plant, the VS-PSHP and multi-type flexible loads are considered, and a day-ahead and real-time coordinated scheduling model are proposed. The proposed model can formulate the generation, contingency reserve and power distribution factor schedules simultaneously. Numerical simulation results indicate that the coordination of VS-PSHP and multi-type flexible loads can increase the system operation economic and mitigating the wind power curtailment. The results also show that the VS-PSHP is good at providing contingency reserve, and the participation of VS-PSHP can lead to a relatively lower total system operation cost compared to the participation of fixed speed pump storage hydropower plant (FS-PSHP).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Improved speed estimation method of linear induction motors

Improved speed estimation method of linear induction motors

引用

Annual Conference of Industrial Electronics Society

作者： Renjun Dian Wei Xu Dong Hu Yi Liu Qi Zhao State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

In this paper, one improved speed estimation method of linear induction motor (LIM) based on stator current observer is developed, of which the observer is deeply investigated and fully optimized. Then it discusses the estimation accuracy of observer influenced by different disturbances, and the effect of observer parameters on dynamic response is analyzed. Through comprehensive simulation, the speed tracking ability under some challenging operation conditions is investigated, which demonstrates that the proposed speed observer enjoys a good estimation capability.

关键词： Observers Adaptation models Induction motors Closed loop systems Frequency locked loops Lyapunov methods

来源：评论

学校读者我要写书评

暂无评论

Paralleled Three-Phase Four-Leg Inverters for Reduction of Common Mode Current and Common Mode EMI

Paralleled Three-Phase Four-Leg Inverters for Reduction of C...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Zewei Shen Dong Jiang Hanxiang Wang Ronghai Qu Xuejun Pei State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

This paper introduces a paralleled three-phase four-leg inverters and the corresponding pulse width modulation (PWM) method for the purpose of reduction the common mode current (CMC) and common mode electromagnetic interference (EMI). Considering the control principle of three-phase four-leg to limit the common mode voltage and the characteristic of paralleled inverters, the simple PWM scheme for paralleled three-phase four-leg inverters can be deduced. In the modified topology, the low frequency and high frequency models can be set up to determine the load parameters of the extra phase. The results based on MATLAB SIMULINK and experiments are provided to validate the proposed method.

关键词： Inverters Pulse width modulation electromagnetic interference Switches Clamps Topology

来源：评论

学校读者我要写书评

暂无评论

Drive for DC-biased sinusoidal current vernier reluctance motors with asymmetrical power electronics devices

Drive for DC-biased sinusoidal current vernier reluctance mo...

引用

Annual Conference of Industrial Electronics Society

作者： An Li Zihan Gao Dong Jiang Shaofeng Jia Ronghai Qu Wubin Kong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

In DC-biased sinusoidal current vernier reluctance machines (DC-biased-VRMs), the DC exciting winding and AC armature winding are integrated into one single winding. Therefore, the copper loss can be reduced with torque density increasing, and only one set of power electronic converter is demanded. This paper is to propose a DC-biased-VRMs drive with asymmetrical power electronics devices and corresponding control strategy. In order to make the power dissipation and temperature rise of each devices more balanced, the asymmetrical H-bridge inverter with both higher current capacity devices and lower ones is designed as well as simulated. The proposed asymmetrical H-bridge can reduce the cost of power electronics devices effectively due to the use of lower current capacity IGBTs and diodes without unipolar current constraint. The simulation and experimental results verify that the proposed drive system is feasible for DC-biased-VRMs driving.

关键词： Torque Inverters Windings Topology Stator windings Mathematical model Reluctance motors

来源：评论

学校读者我要写书评

暂无评论

A Design Method of Hybrid Modular Multilevel Converter with Negative Output Generated by FBSM

A Design Method of Hybrid Modular Multilevel Converter with ...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Yizhe Lin Lei Lin Chen Xu Jiabing Hu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Hybrid modular multilevel converter (MMC) is considered as a promising topology to deal with DC fault in MMC based high-voltage direct current (HVDC) due to the negative output from full-bridge sub-module (FBSM). In addition, the modulation index can be promoted with the negative output, which can enhance the AC voltage and transmission power in steady state. This paper focuses on this situation that FBSMs generate negative output in steady state. A design method of hybrid MMC is proposed, which contains a way to determine the proportion of FBSMs and a means to determine the capacitance of sub-module capacitor. Proceeding from the requirements of AC voltage boosting and DC fault riding through, principles of FBSM proportion design are delivered. Based on a capacitor voltage balancing scheme, the physical process of capacitor voltage fluctuation in half-bridge sub-module (HBSM) and FBSM is analyzed in detail with power factor no less than 0.9. Formulas and diagrams are demonstrated to portray the capacitor voltage fluctuation. And the quantitative design method of the sub-module capacitor is brought out. Simulation in PSCAD/EMTDC is implemented to verify the feasibility and validity of the proposed method.

关键词： Capacitors Modulation Fluctuations Voltage fluctuations Boosting Reactive power Design methodology

来源：评论

学校读者我要写书评

暂无评论

Improved vector control for stand-alone brushless doubly-fed induction generator

Improved vector control for stand-alone brushless doubly-fed...

引用

Annual Conference of Industrial Electronics Society

作者： Kailiang Yu Wei Xu Yi Liu Jianping Gao State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

The brushless doubly-fed induction generator (BDFIG) shows commercial potential for the wind-power generation and ship shaft power generation due to its brushless operation as compared with doubly-fed induction generator. This paper proposes an improved vector control scheme oriented on the power winding flux reference frame to achieve stable stand-alone operation. To improve the dynamic performance of the load disturbance, the feed-forward compensation from the power winding (PW) current is also introduced. Simulation results on steady state and transient state have been carried out to verify the control scheme.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：