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Research on AC/DC Power Flow Optimization by Using Interior Point Method

IOP Conference Series: Materials Science and engineering 2019年第1期486卷

作者： Shuqin Sun Yongbin Li Zhengqing Xu Mingjia Li Can Wang College of Instrumentation and Electrical Engineering Jilin University Lab. Of Geo-Exploration and the Instrumentation Ministry of Education of China Changchun China 130026 *** Beijing Kedong Electric Power Control System Co.Ltd Beijing China 100192

At present, China's power system is developing in the direction of AC-DC parallel connection. AC-DC hybrid transmission has become the inevitable pattern of China's future power grid. In the operation of AC/DC hybrid system, the optimization of multiple indexes is often considered. One of the economic problems of system operation is how to minimize the operation cost of the system. This requires the optimal solution of a system of nonlinear equations with constraints. Among the existing algorithms, the interior point method has excellent convergence performance and has been widely used in power system. In this paper, the basic principle of interior point method is introduced, and the interior point method is used to optimize the AC and DC power flow obtained. With the network operation cost as the objective optimization index. The Matlab software is used for programming and simulation calculation. On the basis of verifying the effectiveness of the algorithm, the algorithm is transplanted into the large network for calculation and analysis, and the adaptability of the test algorithm.

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A High Speed Autofocusing system for Micro system Applications

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Journal of Electronic Science and Technology 2016年第1期14卷 73-79页

作者： Phuchong Sripolsaen Pradit Mittrapiyanuruk Pakorn Keawtrakulpong the Deptartment of Control System and Instrumentation Engineering Faculty of EngineeringKing Mongkut’s University of Technology Thonburi (KMUTT) the Department of Mathematics Faculty of ScienceSrinakharinwirot University the Department of Control System and Instrumentation Engineering Faculty of EngineeringKMUTT

In this paper,we present a high speed autofocus system for micro system applications and design a look-up-table based autofocusing algorithm for applications when a target object is always visible,e.g.,manufacturing parts with alignment *** perform an evaluation of 24 focus measures to verify that which focus measure is the best for the look-up-table based *** the evaluation,we find that the Chebyshev moments-based focus measure（CHEB） is the most ***,we also develop a look-up-table based autofocus system that uses CHEB as the focus *** training phase,we offline construct a table from training images of an object that are captured at several lens *** entry of table consists of focus measure computed from image and lens *** working phase,given an input image,the algorithm first computes the focus measure and then finds the best match focus measure from the table and looks up the corresponding lens position for moving it into the in-focus *** algorithm can perform autofocusing within only 2 steps of lens *** experiment shows that the system can perform high speed autofocusing of micro objects.

关键词： High speed autofocusing look-up table micro system

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Analysis of Indoor Exclusion Zone in Nuclear Power Plant Environments

Analysis of Indoor Exclusion Zone in Nuclear Power Plant Env...

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IEEE International Workshop on Electromagnetics, Applications and Student Innovation (iWEM)

作者： Jong-Eon Park Sangwoon Youn Hosung Choo Jaeyul Choo Metamaterial Electronic Device Research Center Hongik University Seoul Republic of Korea School of Electronic and Electrical Engineering Hongik University Seoul Republic of Korea Department of Instrumentation Control and Electrical System Korea Institute of Nuclear Safety Daejeon Republic of Korea

This article investigates the indoor exclusion zones (EZs) according to room dimensions and compares them with the free space EZs. Fluctuations in the received power level with respect to the distance for various path... 详细信息

关键词： Wireless communication Transmitters Wireless sensor networks Electromagnetic interference Geometry Power generation Safety

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An airborne Position and Orientation system (POS) for remote sensing and its current state

An airborne Position and Orientation System (POS) for remote...

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2017 IEEE International Conference on Imaging systems and Techniques, IST 2017

作者： Zhai, Fengguang Jianli, Li Ye, Wen Gu, Bin Lu, Zhaoxing Qiu, Haitao School of Instrumentation Science and Opto-electronics Engineering Beihang University Beijing China Beijing Institute of Aerospace Control Devices Beijing China National Key Lab of Satellite Navigation System and Equipment Technology Shijiazhuang China

ISBN: (纸本)9781538616208

The airborne Position and Orientation system (POS) is vital shared equipment, and plays an important role in aerial survey and remote sensing system. It achieves the ability to a direct georeferencing for typical optical camera flash imaging system, and to motion compensation for typical SAR integral imaging system, further improves image quality and efficiency of airborne imaging sensors. In this article, the components and operation principles of POS are summarized. The survey of airborne POS and the development trends of aerial survey and remote sensing system are introduced and analyzed. These analyses can provide reference for development of high-precision airborne POS technologies for aerial survey and remote sensing system. © 2017 IEEE.

关键词： Motion compensation

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Research on the Under-voltage Optimal control Method of Analytical Sensitivity for Power Simulation Training

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IOP Conference Series: Materials Science and engineering 2019年第1期486卷

作者： Zhengqing Xu Faqi Yan Chaofang Zhou Yanwei Xiao Shu-qin Sun Hua-song Cao Yu-jie Liu Beijing Kedong Electric Power Control System Co.Ltd. Beijing China 100192 State Grid Huazhong Electric Power Control Subcenter Wuhan China 430077 State Grid Zhejiang Electric Power Co. Hangzhou China 310007 College of Instrumentation and Electrical Engineering Jilin University Lab. Of Geo-Exploration and the Instrumentation Ministry of Education of China Changchun China 130026

As China increasingly interconnecting power system, more and more factors are interfering with the stable operation of the power system. Due to the lack of system reactive power and the overload, resulting in the increasingly problem of low voltage amplitude. Voltage is a measure of whether the power system operation is basically normal index, the voltage level of the power network determines whether the whole power system is stable or not. The dispatcher and operator need to answer any specific challenges to solve the under-voltage in training simulator. In this paper, based on the analytical sensitivity method, the basic principle of the low voltage problem is solved by the method of load shedding and reactive power compensation. Then the low voltage control method is optimized from two aspects of the load shedding load and reactive power compensation. The reactive power compensation with high sensitivity is presented. If the voltage of the compensation is not returned to the allowable range of the state, cutting the load operation according to the magnitude of the load-shedding sensitivity. Using power system simulation software to build a low voltage model of the IEEE-39 classic power system for the sensitivity index and the low voltage optimization control methods are analyzed and verified.

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Research on Distributed Grid Connected Capacity Optimization Method for Power system Pre Dispatch

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IOP Conference Series: Materials Science and engineering 2019年第1期486卷

作者： Zhengqing Xu Faqi Yan Zhicheng Liu Yanwei Xiao Shu-qin Sun Jing Yang Wen-li Yan Beijing Kedong Electric Power Control System Co.Ltd Beijing China 100192 State Grid Huazhong Electric Power Control Subcenter Wuhan China 430077 State Grid Zhejiang Electric Power Co.Ltd Hangzhou China 310007 College of Instrumentation and Electrical Engineering Jilin University Lab. of Geo-Exploration and the Instrumentation Ministry of Education of China Changchun China 130026

The particle swarm optimization algorithm with adaptive weight and Newton-Raphson method are studied to connect the distributed energy to the grid in this paper. We will discuss the research status of the current stage of the project. The basic principles and processes of particle swarm optimization algorithm and Newton-Raphson method are expounded, and their improvement and combination are made (as well as their improvement and combination ) so that they can optimize reactive power for networks with distributed energy better. Then the improved algorithm is applied to the IEEE-14 and IEEE-30 models and the reconstruction results are analyzed. The network loss and reactive power of the reconstruction network are declined, the voltage quality is improved. The SIMULARTOR software is used to establish and calculate the power flow of original model and reconstruction model of IEEE-14 and IEEE-30 respectively. The economic factors with grid supply point and connected capacity are analyzed to obtain the best ratio of power system at the same time. Compared with the above results, the results are basically consistent, and the accuracy and reliability of the algorithm are verified. Finally, considering the economic factors of the system, adjusting the connected capacity of the distributed energy-wind power and photovoltaic, and obtaining the best access ratio (proportion), the economical efficiency of the system is improved, and it has referential value.

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Robot Vision system for Coordinate Measurement of Feature Points on Large Scale Automobile Part

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Journal of Electronic Science and Technology 2016年第1期14卷 80-86页

作者： Pongsak Joompolpong Pradit Mittrapiyanuruk Pakorn Keawtrakulpong the Department of Control System and Instrumentation Engineering Faculty of EngineeringKing Mongkut’s University of Technology the Department of Mathematics Faculty of ScienceSrinakharinwirot University

In this paper,we present a robot vision based system for coordinate measurement of feature points on large scale automobile *** system consists of an industrial 6-DOF robot mounted with a CCD camera and a *** system controls the robot into the area of feature *** images of measuring feature points are acquired by the camera mounted on the robot.3D positions of the feature points are obtained from a model based pose estimation that applies to the *** measured positions of all feature points are then transformed to the reference coordinate of feature points whose positions are obtained from the coordinate measuring machine（CMM）.Finally,the point-to-point distances between the measured feature points and the reference feature points are calculated and *** results show that the root mean square error（RMSE） of measure values obtained by our system is less than 0.5 *** system is adequate for automobile assembly and can perform faster than conventional methods.

关键词： 3D pose estimation coordinate measurement coordinate measuring robot robot vision vision 3D coordinate measurement

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Exclusion zone comparison between in free space and nuclear power plant environment

Exclusion zone comparison between in free space and nuclear ...

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International Symposium on Antennas and Propagation (ISAP)

作者： Sangwoon Youn Jong-Eon Park Jaeyul Choo Hosung Choo School of Electronic and Electrical Engineering Hongik University 94 Wausan-ro Mapo-gu Seoul Republic of Korea Metamaterial Electronic Device Research Center Hongik University 94 Wausan-ro Mapo-gu Seoul Republic of Korea Department of Instrumentation Control and Electrical System Korea Institute of Nuclear Safety 62 Gwahak-ro Yuseong-gu Daejeon Republic of Korea

ISBN: (纸本)9781538653890;9788957083048

We analyze exclusion zones (EZs) for indoor environments in nuclear power plants and compare them with the EZ in free space. When an indoor environment is considered, the lower transmitted power is recommended since multiple reflections increases stronger scattered power. The EZ area is the widest when the transmitter is at the center of the I&C room.

关键词： Transmitters Indoor environment Wireless communication Geometry Power generation Electromagnetics Safety

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Finite-time model-assisted active disturbance rejection control with a novel parameters optimizer for hypersonic reentry vehicle subject to multiple disturbances

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Aerospace Science and Technology 2018年 79卷 588-600页

作者： Yue Yu Honglun Wang Na Li Huiping Zhang Zikang Su Xingling Shao School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing 100191 China Unmanned System Research Institute Beihang University Beijing 100191 China School of Automation Beijing Institute of Technology Beijing 100081 China Beijing Aerospace Automatic Control Institute Beijing 100854 China Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of Education North University of China Taiyuan 030051 China National Key Laboratory for Electronic Measurement Technology School of Instrument and Electronics North University of China Taiyuan 030051 China

In this paper, a scheme which combines finite-time model-assisted active disturbance rejection control and novel greedy criterion-based salp swarm algorithm is developed for attitude tracking problem of hypersonic reentry vehicle with multiple disturbances. To simplify control structure, the control scheme is designed within the framework of active disturbance rejection control completely. To lessen tuning parameters, a sigmoid function-based tracking differentiator is employed to generate a more realizable attitude transient profile instead of utilizing conventional nonlinear tracking differentiator. Taking known model information as model-assisted term, finite-time model-assisted extended state observers are constructed to estimate the lumped disturbance in attitude and angular rate loop with employment of function fal . To achieve rapid response and strong robustness, finite-time model-assisted control laws are derived by utilizing function fhan . Finally, a novel greedy criterion-based salp swarm algorithm is used to optimize control parameters in finite-time model-assisted control laws to achieve optimal solution that minimizes the tracking error and energy consumption. Comparative simulations are conducted to illustrate the effectiveness of the proposed scheme.

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Precision contouring control of 5 DOF dual-arm robot manipulators with holonomic constraints

Precision contouring control of 5 DOF dual-arm robot manipul...

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Asian control Conference

作者： Thanana Nuchkrua Woraphrut Kornmaneesang Shyh-Leh Chen Sudchai Boonto Advanced Institute of Manufacturing with High-Tech Innovations National Chung Cheng University Taiwan National Chung Cheng University Minhsiung TW Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Thailand

ISBN: (纸本)9781509015740;9781509015733

In this paper, the contouring control problem for the 5 DoF dual-arm robot manipulators with constraints is studied. The method of equivalent errors, previously proposed for unconstrained motion systems, is generalized to the system with holonomic constraints in which Lagrange approach is taken. It is demonstrated that the proposed method can be applied to the constrained system provided that the constraints satisfy a proper condition. The contouring controller design is dealt with the problem of stabilization obtained by equivalent errors. Experimental results for contouring paths with different feed-rate verify the effectiveness of the proposed method.

关键词： Robot kinematics Manipulator dynamics Task analysis Machining Manifolds

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