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Assessment of energy storage viability for a PV power plant injecting during peak load time 8

Assessment of energy storage viability for a PV power plant ...

引用

8th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2017

作者： Ferreira, Reginaldo V. Silva, Sidelmo M. Brandao, Danilo I. Antunes, Helio M.A. Fernandes, Nicolas T.D. Dept. of Control and Automation Federal Institute of Minas Gerais IFMG Betim Brazil Graduate Program in Electrical Engineering Federal University of Minas Gerais UFMG Belo Horizonte Brazil

ISBN: (纸本)9781509053384

Photovoltaic (PV) power plants are a form of renewable energy and their importance is increasing all around the world. In Brazil, the PV power plants connected to the grid are regulated through a credit compensation, in which the prosumer pays the difference between consumed and generated energy. Medium voltage consumers pay different prices for the energy consumed in peak load time and off-peak load time. This paper compares the return of investments of a PV plant without and with energy storage systems. This latter injects active power during peak load time. Results show that although the plant without storage presents lowest costs, the solution with batteries can be more profitable depending on the energy tariff and the equipment cost. © 2017 IEEE.

关键词： Investments

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Design, implementation and control of dual axis self balancing inverted pendulum using reaction wheels 10

Design, implementation and control of dual axis self balanci...

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10th International Conference on Electrical and Electronics engineering, ELECO 2017

作者： Türkmen, Abdullah Korkut, M. Yusuf Erdem, Mustafa Gönül, Ömer Sezer, Volkan Mechatronics Graduate Program Istanbul Technical University Istanbul Turkey Energy Institute Istanbul Technical University Istanbul Turkey Dept. of Control and Automation Engineering Istanbul Technical University Istanbul Turkey

ISBN: (纸本)9786050107371

Inverted pendulum systems have an important place in practice for control problems due to their nonlinear structures. It is a very difficult task to control the orientation and speed of objects and robots which are free in three dimensions. These systems constitute the substructure of many advanced systems. Conventional actuators may not be used in such applications due to various limitations. Under these circumstances usage of reaction wheels come into prominence. Reaction wheel based systems are used for orienting, coordinating and balancing of spacecraft, transport systems, and other such systems. In this study, dual axis self-balancing reaction wheel based inverted pendulum system which is a basis for many complex systems has been designed, manufactured and controlled. © 2017 EMO (Turkish Chamber of Electrical Enginners).

关键词： Inverted pendulum

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Evaluation of Lower-Limb Rehabilitation Based on Muscle Fatigue

Evaluation of Lower-Limb Rehabilitation Based on Muscle Fati...

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IEEE International Symposium on Industrial Electronics

作者： Juan Zhao Jinhua She Dianhong Wang Edwardo F. Fukushima Min Wu Hiroshi Hashimoto School of Engineering Tokyo University of Technology Hachioji Tokyo Japan School of Automation China University of Geosciences Wuhan China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan China Master Program of Innovation for Design & Engineering Advanced Institute of Industrial Technology Tokyo Japan

The purpose of this study was to investigate the features of muscle fatigue extracted from surface electromyography (sEMG) signals of lower limbs, and then to present an evaluation method of lower-limb rehabilitation to provide physical basis for the training effect of rehabilitation. Four healthy young university students were invited to perform a pedaling exercise for 40 days. The sEMG signals of four lower-limb muscles are recorded and processed using a Butterworth filter and a Daubechies 10 wavelet. Then, the change of the ratios of the spectrums of Types I and II muscle fibers to the total number of the spectrum along the exercise are examined. The time of the first intersection of the ratios for Types I and II for each muscle is used as a performance index. The increase in the time at the beginning and the end of the training period indicates the improvement of motor function, and thus it verifies the effectiveness of the rehabilitation.

关键词： SEMG Muscle fatigue Rehabilitation evaluation Unequal length segmentation

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Bidirectional multiport microinverter and grid-multimode-operation control for a non-linear load

Bidirectional multiport microinverter and grid-multimode-ope...

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Workshop on Power Electronics and Power Quality Applications (PEPQA)

作者： Frank A. Moreno Vera Jhonatan D. Paucara Prado Javier J. Sotomayor Moriano C. Gustavo Pérez Zuñiga Damian E. Sal y Rosas Celi Master Program in Control and Automation Engineering Pontificia Universidad Católica del Perú Lima Perú Pontificia Universidad Catolica del Peru Lima PE

Micro-inverters usually are used to connect photovoltaic panels (PV) to the electricity grid. If the energy provided by the panel is not enough to satisfy the demands, the system becomes dependent exclusively of the grid. This constraint demands the use of a battery bank, therefore it is necessary to add a third port to the micro-inverter to connect this energy backup. In this paper, a two stage micro-inverter is proposed, the first stage is a DC/DC Triple Active Bridge (TAB) converter that integrates a back-up battery and works in soft switching; and the second stage is a Voltage Source Inverter (VSl) that operates in both grid-connected mode (GCM) and Stand Alone Mode (SAM). The grid-multimode operation controller developed detects the islanding fault and maintains the energy quality for a typical nonlinear load. Reliability and robustness of Uninterrupted Power Supplies (UPS) are increased by the proposed control.

关键词： Phase locked loops Capacitors Microgrids Batteries Bridge circuits Inverters Robustness

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Assessment of energy storage viability for a PV power plant injecting during peak load time

Assessment of energy storage viability for a PV power plant ...

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

作者： Reginaldo V. Ferreira Sidelmo M. Silva Danilo I. Brandao Hélio M. A. Antunes Nicolas T. D. Fernandes Dept. of Control and Automation Federal Institute of Minas Gerais UFMG Betim Brazil Graduate Program in Electrical Engineering Federal University of Minas Gerais UFMG Belo Horizonte Brazil

ISBN: (纸本)9781509053407

关键词： Batteries Inverters Power generation Discharges (electric) Lead compounds Lead

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Design of an Autonomous Aerator

Design of an Autonomous Aerator

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IEEE International Conference on Emerging Technologies and Factory automation

作者： Rilene Carolina Goelzer Letieri ávila Deliel Oliveira Vinícius M. de Oliveira Control and Automation Engineering Federal University of Rio Grande Rio Grande RS Brasil Graduate Program in Computer Engineering Federal University of Rio Grande Rio Grande RS Brasil Universidade Federal do Rio Grande Rio Grande RS BR

Aquaculture has resorted to the use of technology to make control of important variables and improve production. There were two problems observed in the Marine Aquaculture Station - EMA of the Federal University of Rio Grande, more specifically related to the aeration of the culture tanks to pisciculture and carniciculture. Firstly, the high energy consumption of the paddle aerators was identified, due to the continuous need to oxygenate the water. Subsequently, it was noted that static aerators do not aerate the water evenly and they require that their placement be done manually by technicians or assistants. Thus, the article proposes a design of an autonomous aerator with electric power coming from a photovoltaic solar energy system. In the sequence, a navigation system for the aerator is proposed along the tank, based on a differential performance of the motors connected to the paddle.

关键词： Solar Energy Aquaculture Aerator control

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Design, implementation and control of dual axis self balancing inverted pendulum using reaction wheels

Design, implementation and control of dual axis self balanci...

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International Conference on Electrical and Electronics engineering, ELECO

作者： Abdullah Türkmen M. Yusuf Korkut Mustafa Erdem Ömer Gönül Volkan Sezer Mechatronics Graduate Program Istanbul Technical University Istanbul TURKEY Energy Institute Istanbul Technical University Istanbul TURKEY Dept. of Control and Automation Engineering Istanbul Technical University Istanbul TURKEY

关键词： Wheels Mathematical model DC motors Gravity State feedback Torque Aluminum

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Radio frequency safety device applied to chair children in cars 28

Radio frequency safety device applied to chair children in c...

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28th European Modeling and Simulation Symposium, EMSS 2016

作者： Da Cunha Santos, Robson De Oliveira, Karina Barros Moreira, Marcos Antônio Cruz Neto, Severino Joaquim Correia Cunha, Gerson Gomes Fluminense Federal Institute Campus Macaé Engineering and Automation Control 164 km Amaral Peixoto Road Brazil Estácio de Sá University General Alfredo Bruno Gomes Martins Highway s/n Braga-Cabo Frio/RJ Brazil Federal University of Rio de Janeiro Alberto Luiz Coimbra Institute Graduate Engineering and Research Civil Engineering Program COPPE UFRJ Brazil

ISBN: (纸本)9788897999683

The article aims to present a prototype device able to identify and warn those responsible when there is a possibility of forgetting of a child inside the car, thus avoiding an injury to the health of the child or even death. To this effect electronic sensors able to detecting the presence of the child on the chair have been used, microcontrollers (Arduino Uno, Arduino Nano) programmed to perform the data processing, wireless communication module (XBee) to perform the transfer of data between the chair, and a specific key chain, and ultimately actuators responsible for a possible warning against forgetting a child inside the car. Generally speaking, this article comprises concepts involving instrumentation and programming. This paper has the effect of academic results, nowadays there are not many studies concerning the proposed theme and its application is highly viable because of the relatively low cost, making it accessible to all social classes.

关键词： Microcontrollers

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Charcoal and bio-oil production by using a microwave-assisted pyrolysis process

Charcoal and bio-oil production by using a microwave-assiste...

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AISTech 2016 Iron and Steel Technology Conference

作者： Oliveira, Tiago Luís Assis, Paulo Santos Leal, Elisângela Martins Dos Santos Morais, Anderson Ribeiro, Kelly Lopez REDEMAT-Graduate Program in Material Engineering School of Mining Federal University of Ouro Preto MG Brazil Department of Control Automation and Mechanical Engineering School of Mining Federal University of Ouro Preto MG Brazil ONDATEC S.A. Clean Charcoal Technology Innovare Technological Research Av. Cel. Cacildo Arantes 377 Uberaba MG Brazil

ISBN: (纸本)9781935117551

Bio-energy from biomass can be used as renewable energy to reduce CO2 emission in some industrial processes. Fast pyrolysis has emerged as the most promising technology to convert organic materials into liquid fuels at a short time but it still faces some technical challenges in improving product yield, its quality and process energy efficiency. Microwave assisted pyrolysis (MAP) of biomass provides distinctive environment to solve these challenges. In this paper, the pyrolysis of Lemon Eucalyptus was investigated using microwave energy as the heat source, and the yield and characteristics of the pyrolysis oils (i.e. elemental analysis, hydrocarbon composition, and potential fuel properties) and gases are presented and discussed. Here, a pilot unit with 150 kg per hour capacity using MAP technique was built in order to evaluate the energy potential of gases (non-condensable gases-NCG) and liquid (condensable gases-CG) of a biomass pyrolysis plant. The pyrolysis process was in continuous mode and in two stages, biomass drying and pyrolysis, with charcoal production, pyrolysis gas and bio-oil. The results showed that about 63% of the raw material was converted to charcoal and 37% to pyrolysis gas and bio-oil. In the pyrolysis gas fraction, 46% corresponds to the nitrogen from the air. There was a 1638 kg of air entering in the system, which was verified by mass balance. This air inlet implies several drawbacks, mainly explosion risks. The bio-oil fraction was analyzed showing that there was a 45% of pyroligneous gas followed by about 33% of water. It can be seen that the lower calorific value of condensable gases can be increased with the removal of water from its composition. The study of energy availability showed an averaged value of 5.60 MWh of thermal energy per ton of charcoal produced in the prototype.

关键词： Biomass

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Adaptive fuzzy sliding mode active vibration control for rail vehicle pantograph

Adaptive fuzzy sliding mode active vibration control for rai...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Tsung-Chih Lin Jian-Lin Yeh Chia-Hao Kuo Yu-Chen Lin Valentina E. Balas Department of Electronic Engineering Feng-Chia University Taichung Taiwan Ph.D. Program of Electrical and Communications Engineering Feng-Chia University Taichung Taiwan Department of Automatic Control Engineering Feng Chia University Taichung Taiwan Department of Automation and Applied Informatics Aurel Vlaicu University of Arad Arad Romania

ISBN: (纸本)9781509006274

In this paper, the uncertain dynamic active pantograph-catenary system which considers the effect of time-varying stiffness resulting from the uneven overhead wire is investigated to improve current collection for light rail vehicle. In order to achieve stable current collection, and hence improve the performance of the overall electricity supply, sliding mode control strategy and adaptive fuzzy sliding mode control scheme are combined. The uplift force which is applied to pantograph frame by actuator is constructed by incorporating fuzzy neural network (FNN) and sliding mode control to attenuate the chattering problem resulting from the sliding mode control. Based on the Lyapunov stability theorem, the active control law and adaptive laws for the free parameters of the FNNs can be derived to effectively suppress vibration of the pantograph system.

关键词： Force Cats Dynamics Wires Sliding mode control Fuzzy neural networks Fuzzy control

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