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IEEE Green Technologies Conference (IEEE-Green)

作者： Linlin Wu Wenzhong Gao Zhengpai Cui Xiao Kou Dept. of Smart Grid and Renewable Resource Tech. State Grid Jibei Electric Co. Ltd. Research Institute Beijing China Electric Power Dispatching and Control Center State Grid Jibci Electric Co. Ltd Beijing China Dept. Electrical and Computer Engineering University of Denver Denver Colorado USA

ISBN: (纸本)9781479988853

Integration of large scale wind power is both economical and environmentally-friendly. However, stochasticity and intermittency of wind power bring new challenges to frequency stability issue of the wind power system. The frequency regulation capacity limitation of the power system is one of the most important reasons limiting integration capacity of wind power. The power output of energy storage system (ESS) can be regulated very rapidly. Hence, it is feasible and effective for ESS to participate in system frequency regulation. This will increase overall system frequency regulation capacity and thus helps accommodating more wind power integrated into the power grid. A novel strategy for ESS to participate in frequency regulation is proposed in this paper. The control strategy includes two stages: in the first stage, ESS regulates its power output based on the wind power prediction information, in the second stage, frequency feedback is used to regulate the ESS power output to further reduce steady state frequency deviation. Since the ESS power output can be regulated before the frequency deviation happens, the dynamic response speed of frequency regulation of ESS can be significantly improved. Besides, frequency deviation can be decreased thanks to the step command in the first stage. Simulation of a wind power system is performed in Real Time Digital Simualtor (RTDS) and the results show the effectiveness of the proposed method.

关键词： Frequency control Wind power generation Time-frequency analysis Energy storage Power system stability Steady-state Simulation

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Fostering automatic control students to become innovators 19

Fostering automatic control students to become innovators

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19th IFAC World Congress on International Federation of automatic control, IFAC 2014

作者： Johnsson, Charlotta Yang, Qinmin Nilsson, Carl-Henric Jin, Jun Larsson, Andreas Warell, Anders Dept. of Automatic Control Lund University Lund Sweden Control Science and Engineering ZheJiang University Hangzhou China Business Adminstration Lund University Lund Sweden School of Management ZheJiang University Hangzhou China Dept. of Design Sciences Lund University Lund Sweden

ISBN: (纸本)9783902823625

Today, innovation is a key word for many universities, as it constitutes an important part of most universities' public and scientific outreach task. Many universities are striving to increase the number of innovations generated at the university. A common method is to provide various support for research projects e.g.;providing researchers with information about international patent rights (IPR), offering administrative or financial help concerning patent applications, giving entrepreneurship and start-up support, etc. However, fostering innovators and entrepreneurs can start already in undergraduate/graduate courses, i.e. long before a student potentially reaches the research level. We believe that key factors for success in this matter are diversity and freedom. A course that strives to promote innovation capability must allow for students with different backgrounds and different curricula to meet and work together, and must allow for students to freely use their current knowledge within new contexts. This is generally not a setting provided in traditional undergraduate/graduate courses. This article describes the execution and outcome of an graduate course "international Market-Driven engineering (iMDE)" in which diversity and freedom are key factors. The course is international and multi-disciplinary in terms of students, teachers and subjects. Graduate students with prior knowledge in automatic control constitute one important part of the course population. We believe that the diversity amongst the students, and their freedom when it comes to both innovation process and product, provides a promising platform in which seeds of ideas can grow into conceptual prototypes that build a solid foundation for full-scale innovations. On of the iMDE-projects, the Elderly Accessible Chair, or EA Chair, with its automated scanning and automatic seat-provider functionality, is one concrete example of this. © IFAC.

关键词： Students

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Designing Robotic Avatars in Second Life - A Tool to Complement Robotics Education

Designing Robotic Avatars in Second Life - A Tool to Complem...

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IEEE Global engineering Education Conference

作者： Catalin Buiu Mihai Gansari Dept. of Automatic Control and Systems Engineering Politehnica University of Bucharest

ISBN: (纸本)9781479931927

This paper presents some considerations on a new educational approach aimed at complementing the traditional robotics education. The main idea and contribution is to introduce students to Second Life (a free 3D social virtual world) and to the Linden Scripting Language (the Second Life programming language with a syntax similar to C) and then to ask them to design robotic avatars replicating low and medium complexity behaviors which they have previously seen or programmed for simulated or real robots. This approach brings flexibility in working time and a definite social dimension which add to the benefits of the traditional classroom education. Results from a survey conducted with students taking a Robotics and Virtual Reality course demonstrate the validity of this approach in stimulating the students in learning.

关键词： Robot control Avatars Simulation Virtual reality

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Introduction

Introduction

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International Conference on Electrical engineering, Computing Science and automatic control (CCE)

作者： Felipe Gómez Castañeda Francisco Rodríguez Henríquez Wen Yu Liu Vacuum Electronics National Laboratory Beijing Vacuum Electronics Institute Beijing China Dept. Electrical Engineering Daejeon Korea Advanced Institute of Science and Technology TERA Laboratory South Korea Vacuum Electronics National Laboratory School of Physical electronics University of Electronic Science and Technology of China Chengdu Sichuan China Automatic Control Mexico

This year we are celebrating the 12th International Conference, and the eighth edition in which its organization includes the participation of three academic departments at CINVESTAV: Electrical engineering, computer Science and automatic control. The conference remains as a specialized forum where local research groups can present their recent results and proposals, interact with each other, and have the opportunity to become aware of the recent research and developments from leading institutions abroad, too. Also, the interaction with technological industry managers and government officers, keeps a special place in the activities of the conference.

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Particle filter-based Gaussian process optimisation for parameter inference

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IFAC Proceedings Volumes 2014年第3期47卷 8675-8680页

作者： Johan Dahlin Fredrik Lindsten Division of Automatic Control Linköping University Sweden Dept. of Engineering University of Cambridge United Kingdom

We propose a novel method for maximum-likelihood-based parameter inference in nonlinear and/or non-Gaussian state space models. The method is an iterative procedure with three steps. At each iteration a particle filter is used to estimate the value of the log-likelihood function at the current parameter iterate. Using these log-likelihood estimates, a surrogate objective function is created by utilizing a Gaussian process model. Finally, we use a heuristic procedure to obtain a revised parameter iterate, providing an automatic trade-off between exploration and exploitation of the surrogate model. The method is profiled on two state space models with good performance both considering accuracy and computational cost.

关键词： Maximum Likelihood Parameter Estimation Gaussian Processes Sequential Monte Carlo Machine Learning Bayesian Optimisation

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Multi-objective control strategy for energy management of grid-connected heterogeneous microgrids

Multi-objective control strategy for energy management of gr...

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American control Conference

作者： Christos D. Korkas Simone Baldi Iakovos Michailidis Elias B. Kosmatopoulos Dept. of Electrical and Computer Engineering Democritus University of Thrace Xanthi 67100 Greece Delft Center for Systems and Control Delft University of Technology Delft 2628CD The Netherlands Informatics & Telematics Institute Center for Research and Technology Hellas (ITI-CERTH) Thessaloniki 57001 Greece

ISBN: (纸本)9781479917730

The demand-side energy management of microgrids comprising of buildings of heterogeneous nature (residential, commercial, industrial, etc.) and thus exhibiting heterogeneous occupancy pattern, requires the development of appropriate energy management systems (EMSs) that can integrate the maximum exploitation of the distributed energy resources like photovoltaic panels with the thermal comfort of the occupants. This paper presents a simulation-based optimization approach for the design of an EMS in grid-connected photovoltaic-equipped microgrids with heterogeneous buildings and occupancy schedules. The EMS optimizes a multi-objective criterion that takes into account both the energy cost and the thermal comfort of the aggregate microgrid. A three-building microgrid test case is used to demonstrate the effectiveness of the proposed approach: comparisons with alternative rule-based and optimization-based EMSs show that the proposed EMS strategy exploits the occupancy information to automatically change the energy demand of each building, resulting in improved energy cost and thermal comfort.

关键词： Energy management THERMAL COMFORT Energy costs MICRO-GRID Vehicle Occupancy multi-objective control Buildings control strategy distributed energy resources Optimal design

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A Compact Power Converter for Hybrid Energy Systems

A Compact Power Converter for Hybrid Energy Systems

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Annual Conference of the IEEE Industrial Electronics Society

作者： Jun Cai Qing-Chang Zhong David Stone Dept. Automatic Control and Systems Engineering The University of Sheffield Dept. Electronics and Electrical Engineering The University of Sheffield

ISBN: (纸本)9781479940318

In hybrid energy systems, batteries and superca-pacitors are usually taken as storage mechanisms for smoothing output power, start-up transition, and various load conditions. As a result, developing hybrid power conversion systems has become an attractive research topic. In this study, a compact non-isolated bidirectional DC-DC converter is proposed to interface two DC power sources, which mainly benefit with reduced power switches. In detail, only two switches are needed while for conventional systems four switches are required. Although the number of switches is reduced by half, the proposed converter is still proficient for energy diversification from two energy sources individually or simultaneously. Another benefit of the proposed converter is its extensibility. Several converters are given by easily extending the proposed converter to different applications. They also feature with reduced power switches compare to conventional systems. Detailed analysis on the topology and control algorithm of the proposed converter are given. Real-time simulation results are provided to verify the validity of the proposed system.

关键词： DC-DC converter Bidirectional Non isolated Topology Reduced power switches Hybrid energy systems

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Compact bidirectional DC-DC converters with two input sources

Compact bidirectional DC-DC converters with two input source...

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IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

作者： Jun Cai Qing-Chang Zhong Dept. Automatic Control and Systems Engineering The University of Sheffield Sheffield UK

ISBN: (纸本)9781479951161

The design of multi-input DC-DC converters for hybrid energy systems is still a very challenging problem, especially when all input/output ports are required to be bidirectional. In this paper, a compact non-isolated bidirectional DC-DC converter is proposed to interface two input DC power sources. The proposed converter is proficient for energy diversification from two energy sources individually or simultaneously. It can be operated bidirectionally in both buck and boost modes. With comparison to traditional double inputs boost converters, only three controllable power switches are needed in the proposed converter, which is much cost effective. The topology is analysed in detail and a control algorithm are proposed to operate the converter. Simulation results are presented to verify the validity of the converter.

关键词： Switches Uninterruptible power systems Silicon Integrated circuits

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An asymmetrical ΓZ-source hybrid power converter with space vector pulse-width modulation

An asymmetrical ΓZ-source hybrid power converter with space...

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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Jun Cai Qing-Chang Zhong Dept. Automatic Control and Systems Engineering The University of Sheffield Sheffield UK

In this paper, an asymmetrical ΓZ-source hybrid power converter is proposed for fuel cell-battery hybrid vehicle application. The converter uses an asymmetrical ΓZ-source converter to interface the fuel cell and a bidirectional DC-DC converter to interface the battery. Via the DC-DC converter, the capacitor voltage of the asymmetrical ΓZ-source converter can be controlled into a constant value. By adjusting the modulation index of the inverter, the fuel cell voltage can be controlled into the reference value, which can ensure high operation efficiency in the fuel cell. To reduce the number of semiconductor switching in the shoot through states, the space vector pulse-width modulation (SVPWM) control method is implemented for achieve the maximum constant boost control for the asymmetrical ΓZ-source inverter. To verify the validity of the proposed power converter topology and the control methods, the real-time simulation model is performed in Opal-RT Real Time Digital Simulator. The simulation results demonstrated the feasibility of the proposed methods.

关键词： Fuel cells Inverters Batteries Vectors DC-DC power converters Switches

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Improved chicken swarm optimization

Improved chicken swarm optimization

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent Systems

作者： Dinghui Wu Fei Kong Wenzhong Gao Yanxia Shen Zhicheng Ji Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan University Wuxi Jiangsu China Key Laboratory of Advanced Process Control for Light Industry of Ministry of Education Jiangnan University Wuxi Jiangsu China Dept. of Electrical and Computer Engineering University of Denver Denver CO USA

ISBN: (纸本)9781479987313

Considering the problem that the original chicken swarm optimization algorithm is easy to fall into local optimum because of premature convergence for high-dimensional complex problems, an improved chicken swarm optimization was proposed. In this algorithm, the part of chicks learning from the rooster in their subgroup is added to chick's position update equation, and the inertia weight and learning factor are also introduced. Then eight benchmark functions are used to test the proposed algorithm and the comparison with particle swarm optimization, bat algorithm, and original chicken swarm optimization are also performed. The simulated experimental results showed that the proposed algorithm is able to avoid premature convergence and therefore can escape from local optimum. Especially, the proposed method outperforms other evolutionary algorithms in finding the global optimum for high-dimensional problems.

关键词： Convergence Algorithm design and analysis Particle swarm optimization Benchmark testing Optimization Accuracy Standards

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