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53rd International Universities Power engineering Conference, UPEC 2018

作者： Minh Trang, Le Thi Nouri, Hassan Department of Instrumentation and Control Engineering Czech Technical University in Prague Prague Czech Republic Power System Electronics and Control Research Laboratory University of West of England Bristol United Kingdom

ISBN: (纸本)9781538629109

The frequency variation of a power system depends on the relationship between power generation and consumption. Increase in loads, losses or inclusion of renewable energies will lead to inaccurate controllability of the network frequency, which is the result of consumption-generation imbalance. If this imbalance is high, damage and degradation of network performance, as well as trips of loads and generators is inevitable. In modern grids attention is given to the amount of power supplied to satisfy the loads and system losses and also for reserve services. The latter provides security and stability of the *** control is usually provided by generating units to regulate the generated power. In modern networks such as smart grids, the power reserve concepts are used via three different technologies, namely: Frequency Containment Reserves (FCR), Frequency Restoration Reserves (FRR) and Replacement Reserves (RR). In some countries such as Denmark and Norway, it is compulsory for FCR to be implemented in the network. The FCR is operating the reserves necessary for constant containment of frequency deviations from nominal value in order to constantly maintain the power balance in the whole synchronously interconnected system. Compared with traditional reserves, the FCR can deliver the same service plus the additional benefit of faster response speed in *** paper proposes a dynamic simulation model of an interconnected network to identify frequency responses based on current practice in power systems frequency control. The dynamic frequency response identification method is deployed in two steps: the first step is the representation of the dynamic models of the power system through the power equilibrium equation and in the second step, modelling the frequency control system in response to the frequency variations, which consider FCR technology. Simulations are carried out in MATLAB/SIMULINK and the simulation studies of the frequency responses confirm

关键词： MATLAB

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

Research on the Under-voltage Optimal Control Method of Anal...

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2019 4th Asia Conference on Power and Electrical engineering (ACPEE 2019)

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. State Grid Huazhong Electric Power Control Subcenter State Grid Zhejiang Electric Power Co. College of Instrumentation and Electrical Engineering Jilin University Lab.Of Geo-Exploration and the Instrumentation Ministry of Education of China

As China increasingly interconnecting power system,more and more factors are interfering with the stable operation of the power *** to the lack of system reactive power and the overload,resulting in the increasingly problem of low 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 *** dispatcher and operator need to answer any specific challenges to solve the under-voltage in training *** 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 *** the low voltage control method is optimized from two aspects of the load shedding load and reactive power *** reactive power compensation with high sensitivity is *** 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 *** 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.

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

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Sources of atmospheric glyoxal and methylglyoxal in Beijing and its impact on wintertime secondary organic aerosol formation

Sources of atmospheric glyoxal and methylglyoxal in Beijing ...

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第二十四届大气污染防治技术研讨会

作者： Xionghui Qiu Shuxiao Wang Qi Ying Lei Duan Jia Xing Jingyuan Cao Di Wu Xiaoxiao Li Chengzhi Xing Xiao Yan Cheng Liu Jiming Hao MOE Key Laboratory of Resources and Environmental System Optimization College of Environmental Science and Engineering North China Electric Power University State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Zachry Department of Civil Engineering Texas A&M University College Station School of Earth and Space Sciences University of Science and Technology of China National Engineering Research Center of Urban Environmental Pollution Control Beijing Municipal Research Institute of Environmental Protection Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China

Atmospheric glyoxal(GLY) and methylglyoxal(MGLY) are key precursors of secondary organic aerosol(SOA). However, anthropogenic emissions of GLY and MGLY and their contribution to surface GLY and MGLY concentrations, as well as the secondary organic aerosol(SOA) formation, are not well quantified. By developing an emission inventory of anthropogenic GLY and MGLY and improving Community Multiscale Air Quality Model(CMAQ) with SOA formation from irreversible surface uptake of GLY and MGLY, as well as a precursor-origin resolved technique, we quantified the source contributions of GLY and MGLY and their impact on wintertime SOA formation in Beijing, China. The total emissions of GLY and MGLY in Beijing in 2017 are 1.1×10～4 kmol and 7.0×10～3 kmol, respectively. Anthropogenic primary emissions are found to be the dominant contributor to GLY and MGLY concentrations(～74% for GLY and ～63% for MGLY). Anthropogenic primary emissions of GLY and MGLY contributes to 30% of GLY/MGLY SOA daily average concentration and accounts for up to 45% of nighttime GLY/MGLY SOA. The study suggests that the anthropogenic GLY and MGLY emissions, mainly from gasoline vehicles and cooking, are important for SOA formation and shall be strictly controlled in Chinese megacities.

关键词： SOA Sources of atmospheric glyoxal and methylglyoxal in Beijing and its impact on wintertime secondary organic aerosol formation

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Temperature Sensing Characteristics of Surface Acoustic Wave Brillouin Scattering in Optical Microfibers

Temperature Sensing Characteristics of Surface Acoustic Wave...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Yi Liu Yuanqi Gu Pengfei Chen Rongrong Guo Yao Yao Yajun You Wenjun He Xiu-Jian Chou Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology 79 West Yingze Street Taiyuan China Institute of Optoelectronic Engineering College of Physics and Optoelectronics Taiyuan University of Technology 79 West Yingze Street Taiyuan China Strong Digital Technology Co. Ltd. (Thinvent) Nanchang China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of China 3 Xueyuan Street Taiyuan China College of Mechatronics Engineering North University of China Taiyuan China Science and Technology on Electronic Test and Measurement Laboratory School of Instrument and Electronics North University of China Taiyuan China

ISBN: (纸本)9781665409889

Abstract-Temperature sensing characteristics of surface acoustic wave Brillouin scattering in 1-1.3 $\mu\mathrm{m}$ diameter optical microfibers are simulated by using the elastodynamic equation including the electrostrictive stress. A multi-peak Brillouin gain spectrum with rather high scattering efficiency is observed. The highest temperature sensitivity of the surface acoustic mode is 0.568 MHz/°C. Meanwhile, the temperature sensitivity of the surface acoustic mode is less affected by fiber diameter changes, ranging from 0.05 to 0.25 MHz/°C/$\mu\mathrm{m}$. It can be found that using SAW BS for temperature sensing would put less stress on manufacturing constraints for optical microfibers. Moreover, the results provide guidance for the further improving the performance of temperature sensing in the microelectronics field.

关键词： Temperature sensors Optical fibers Optical fiber sensors Temperature distribution Sensitivity Surface acoustic waves Microelectronics

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

Research on Distributed Grid Connected Capacity Optimization...

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2019 4th Asia Conference on Power and Electrical engineering (ACPEE 2019)

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 State Grid Huazhong Electric Power Control Subcenter State Grid Zhejiang Electric Power Co.Ltd College of Instrumentation and Electrical Engineering Jilin University Lab.of Geo-Exploration and the Instrumentation Ministry of Education of China

The particle swarm optimization algorithm with adaptive weight and NewtonRaphson method are studied to connect the distributed energy to the grid in this *** will discuss the research status of the current stage of 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 *** the improved algorithm is applied to the IEEE-14 and IEEE-30 models and the reconstruction results are *** network loss and reactive power of the reconstruction network are declined,the voltage quality is *** SIMULARTOR software is used to establish and calculate the power flow of original model and reconstruction model of IEEE-14 and IEEE-30 *** economic factors with grid supply point and connected capacity are analyzed to obtain the best ratio of power system at the same *** with the above results,the results are basically consistent,and the accuracy and reliability of the algorithm are ***,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.

关键词： Newton swarm Research on Distributed Grid Connected Capacity Optimization Method for Power system Pre Dispatch

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Application of Distributed control system for Monitoring and control of Three Tank Level control

Application of Distributed Control System for Monitoring and...

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IEEE International Conference on Recent Trends in Electronics, Information & Communication Technology (RTEICT)

作者： N S Pooia Manasa Ghatke Sandra D'souza Instrumentation and control system Engineering Manipal institute of technology Manipal India

ISBN: (数字)9781538624401

ISBN: (纸本)9781538624418

In this paper describes our experiences designing controller to control the three tank level control system. The controller used is Distributed control system(DCS) using CentumVP software. We performed experiment measuring the Proportional Integral Derivative (PID) values. We found that our Distributed control system controller outperformed stable.

关键词： Valves Level control Instruments Decentralized control Software Liquids

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Correction to: Steady State Frequency Response Design of Finite Time Iterative Learning control

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The Journal of the Astronautical Sciences 2020年第2期67卷 814-814页

作者： Panomruttanarug, Benjamas Longman, Richard W. Phan, Minh Q. Department of Control System and Instrumentation Engineering King Mongkut’s University of Technology Thonburi Bangkok Thailand Mechanical Engineering Columbia University New York USA Thayer School of Engineering Hanover USA

In the original article, the sentence below the eq. (13) had an incorrect “a” value.

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Solving of logic functions systems using genetic algorithm 2

Solving of logic functions systems using genetic algorithm

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2nd International Scientific and Practical Conference "Fuzzy Technologies in the Industry - FTI", FTI 2018

作者： Kurbanov, V.G. Burakov, M.V. Department of Control System of Saint-Petersburg State University of Aerospace Instrumentation Bolshaya Morskaya 67 St. Petersburg Russia Institute of Problems in Mechanical Engineering Russian Academy of Sciences 61 Bol'shoi pr. Petersburg Russia

The problem of solving a system of logical functions that occurs in the analysis and synthesis of intelligent control systems for nonlinear dynamic plants is considered. The arithmetic of logical functions is proposed by using the Zhegalkin basis and the evolutionary solution of the system of logical functions by means of a genetic algorithm. The given examples show that the offered algorithm can be successfully used in practice. © 2018 CEUR-WS. All rights reserved.

关键词： Genetic algorithms

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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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2018 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition, iWEM 2018

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

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

ISBN: (纸本)9781538648346

关键词： Nuclear power plants

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A Light Source system of Multi-star Simulator with Adjustable Background and controllable Magnitude

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空间科学学报 2017年第6期37卷 760-765页

作者： SUN Gaofei LIU Shi ZHANG Guoyu ZHANG Yu LEI Jie MA Yiyuan College of Optoelectronic Engineering Changchun University of Science and Technology Changchun 130022 Optical Measurement and Control Instrumentation Jilin Province Engineering Research Center Changchun 130022 Key Laboratory of Space System Simulation Beijing 100853

A light source of multi-star simulator capable of background adjustment and magnitude control has been *** integrating spheres are employed as the star-point light source and the background light source respectively.A beam splitter prism has been designed to serve as the beam combiner for the star-point and the background light sources,and a mathematical model has been constructed respectively to compute the light flux of the two integrating spheres.A magnitude testing system and a background testing system have been created using low-light illuminometer,luminance meter,and testing instruments to measure the star-point magnitude and the background luminance of the multi-star *** test results suggest that the star-point magnitude is adjustable from0 to+5 m_v,with a simulation precision superior to ±0.026 m_*** maximum background luminance is 3.8×10~5 cd·m^(-2),and the minimum background luminance is6.4×10^(-2)cd·m^(-2).The designed light source system can meet the requirements for simulating the stellar map with a sky background.

关键词： Adjustable background controllable magnitude Multi-Star simulator Light source

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