2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA)最新文献_第7页

Dynamic Coupled Electrical and Thermal Model for PV-T Solar Energy Collectors PV-T太阳能集热器的动态电热耦合模型

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617098

N. M'Sirdi, M. Benabdellatif, G. Marco Tina, A. Naamane

引用次数: 5

Control of a Grid Connected DFIG Based Wind Turbine Emulator 基于并网DFIG的风力机仿真器控制

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617049

Z. Dekali, L. Baghli, A. Boumediène, M. Djemai

引用次数: 10

A Nonlinear Optimal Control Approach for DFIG Wind Power Generators DFIG风力发电机非线性最优控制方法

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617073

G. Rigatos, P. Siano, M. Abbaszadeh, P. Wira

{"title":"A Nonlinear Optimal Control Approach for DFIG Wind Power Generators","authors":"G. Rigatos, P. Siano, M. Abbaszadeh, P. Wira","doi":"10.1109/EFEA.2018.8617073","DOIUrl":"https://doi.org/10.1109/EFEA.2018.8617073","url":null,"abstract":"A nonlinear optimal (H-infinity) control method is proposed for a wind power generation system which consists of two-mass drivetrain and a DFIG. With reference to the 6-th order dynamic model of the DFIG, the state-space model of the considered power generation unit is extended by including in it the dynamics of the drivetrain. At a first stage, the dynamic model of the power generation unit undergoes approximate linearization around a temporary operating point which is recomputed at each time-step of the control algorithm. The linearization procedure makes use of Taylor series expansion and of the computation of the associated Jacobian matrices. At a second stage an H-infinity controller is developed for the linearized state-space description of the power unit. This provides the solution of the optimal control problem for the wind power system under model uncertainty and external perturbations. For the computation of the controller's feedback gain an algebraic Riccati equation is repetitively solved at each iteration of the control method. Finally, the global asymptotic stability of the control scheme is proven with the use of Lyapunov analysis.","PeriodicalId":447143,"journal":{"name":"2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132735109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of Theoretical and Accessible Wave Power Resources along the Bulgarian Littoral (Western Black Sea) 保加利亚沿岸(黑海西部)理论和可利用波浪能资源评价

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617057

D. Markov, R. Velichkova, I. Simova, N. Valchev

引用次数: 2

Multi-Stage Integration of Renewable Energy Technologies into Standalone Energy Systems 可再生能源技术与独立能源系统的多阶段集成

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617047

A. Perera, J. Scartezzini, N. Iliadis

{"title":"Multi-Stage Integration of Renewable Energy Technologies into Standalone Energy Systems","authors":"A. Perera, J. Scartezzini, N. Iliadis","doi":"10.1109/EFEA.2018.8617047","DOIUrl":"https://doi.org/10.1109/EFEA.2018.8617047","url":null,"abstract":"Renewable energy integration into energy systems have been widely discussed in recent literature. Stand-alone micro-grids can play a vital role in this context. However, design optimization of such hybrid energy systems is a challenging task. Most of the recent studies use the techno-economic and demand data at the beginning of the project to optimize the system configuration for the micro-grid, which is expected to operate for more than twenty years. Changes in demand, advances in technology, prices of system components and fuel along the timeline are not considered in these studies, which often lead towards unrealistic results. In order to address the aforementioned limitations, the design process of a stand-alone micro-grid is divided into several stages and taken into discussion in this work. System design is optimized in three stages considering the changes of market prices of the system components and demand. Subsequently, each design is analyzed in detailed for a case study in Greece. Results of the study reveal that a significant change in Solar PV (PV) and battery energy storage system (BESS) capacity can be observed when moving ahead on the time line when considering the changes in market conditions. Accordingly, major change in the operation strategy is observed. However, projected price reduction in energy storage is not sufficient to use it as a seasonal or diurnal storage, which results in poor utilization of PV energy during the summer.","PeriodicalId":447143,"journal":{"name":"2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115721921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Variable Stator Frequency Control of Stand-Alone DFIG with Diode Rectified Output 二极管整流输出单机DFIG定子变频控制

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617045

Manish Niraula, Lizon Maharjan, B. Fahimi, M. Kiani, I. Boldea

{"title":"Variable Stator Frequency Control of Stand-Alone DFIG with Diode Rectified Output","authors":"Manish Niraula, Lizon Maharjan, B. Fahimi, M. Kiani, I. Boldea","doi":"10.1109/EFEA.2018.8617045","DOIUrl":"https://doi.org/10.1109/EFEA.2018.8617045","url":null,"abstract":"Variable frequency operation of stand-alone doubly fed induction generator (DFIG) is analyzed in this paper, in order to extend the operating speed range of the generator and optimize the power conversion efficiency. In a stand-alone configuration, the stator feeds a three-phase diode rectifier and a stand-alone electrical load. The dc output voltage of the generator is regulated by applying stator flux-oriented control scheme in synchronous reference frame. The losses in the power electronics components depends on the current flowing through the switches and as such also influences the power rating of the converter. In addition, the speed range of the DFIG is also determined by the converter rating. Thus, in the present paper to extend the speed range, for the same converter rating, the slip of the system is limited which can be achieved by setting the stator frequency free. Since the stator voltage amplitude is imposed by the dc-link voltage which is regulated to a constant reference value, a variation in stator flux magnitude results in a frequency variation. Therefore, the stator frequency can be scheduled in such a way that the output power is maximized. After the dc output voltage and inner d-q controller are designed, simulation tests have been run to find the optimal stator frequency for a fixed range of speed and consequently used as a look up table to improve the power conversion efficiency of the generator system for a limited rotor side converter rating (approximately 22%) in a 2.5:1 speed range at constant dc output voltage and power.","PeriodicalId":447143,"journal":{"name":"2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124595198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Application of the Microprocessor-Based MV Protective Equipment for Energy Management Purposes 基于微处理器的中压防护设备在能量管理中的应用

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617092

Radoslav Antic, D. Vuković, M. Bebic, L. Ristic

引用次数: 1

H-Infinity Kalman Filter for Condition Monitoring of Steam-Turbine Power Generation Units 用于汽轮机发电机组状态监测的h -∞卡尔曼滤波

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617067

G. Rigatos, N. Zervos, D. Serpanos, V. Siadimas, P. Siano, M. Abbaszadeh

{"title":"H-Infinity Kalman Filter for Condition Monitoring of Steam-Turbine Power Generation Units","authors":"G. Rigatos, N. Zervos, D. Serpanos, V. Siadimas, P. Siano, M. Abbaszadeh","doi":"10.1109/EFEA.2018.8617067","DOIUrl":"https://doi.org/10.1109/EFEA.2018.8617067","url":null,"abstract":"The article proposes a systematic method for fault diagnosis and protection from cyberattacks in thermal power generation units, which makes use of the H-infinity Kalman Filter and of the statistical properties of the χ2 distribution. An approximate linearization procedure is applied first to the the nonlinear state-space description of a power unit that comprises a steam turbine and a synchronous power generator. Using this modelling approach the power unit is synchronized with the grid's frequency. Moreover, an H-infinity Kalman Filter that relies on the approximately linearized model is used for representing the fault-free functioning of the power unit. The measured outputs of the power generation unit (that is the generator's turn angle and speed and the turbine's power) are compared against the estimated outputs which are provided by the H-infinity Kalman Filter. The associated differences form the residuals' sequence which in turn undergoes statistical processing in an aim to solve the power unit's fault diagnosis problem. It is shown that the square of the residuals' vector, suitably weighted by the inverse of the covariance matrix of the measured outputs vector of the power unit follows the χ2 distribution and stands for a statistical fault detection test. Actually, by exploiting the statistical properties of the χ2 distribution and its confidence intervals one can define reliable fault thresholds for the power unit's functioning. Whenever the aforementioned fault thresholds are exceeded the existence of a malfunctioning or cyberattack in the power unit can be concluded. Moreover, by applying the previous statistical test to the individual components of the power unit one can distinguish if the fault or cyberattack has taken place in the synchronous generator or in the steam turbine.","PeriodicalId":447143,"journal":{"name":"2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Citizen Engagement as a Business Model for Smart Energy Communities 公民参与作为智能能源社区的商业模式

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/EFEA.2018.8617063

Beth Massey, P. Verma, S. Khadem

{"title":"Citizen Engagement as a Business Model for Smart Energy Communities","authors":"Beth Massey, P. Verma, S. Khadem","doi":"10.1109/EFEA.2018.8617063","DOIUrl":"https://doi.org/10.1109/EFEA.2018.8617063","url":null,"abstract":"Citizen Engagement for energy efficient cities and communities is a concept that is well researched. Quite often in the context of a smart city and the related technology paradigms and infrastructures that citizens must deal with. However, as the concept of smart cities becomes mainstream, the assumption is that citizens naturally and passively shift with these changes. In any given sector business models are natural benefactors to nascent technologies from which revenues and markets are created. In the smart cities space there is a wide range of innovations over citizen engagement strategies and citizen-centric activities including providing trusted sources for democratic legitimacy and transparency with local governments. The common focus has been on finding the trigger that engages communities in a sustainable way. The novelty in this paper is based on the idea that sustained citizen engagement needs a business model, in the same way that new markets need business models, around which frameworks for stakeholder definition, value added propositions, revenue creation and required outcomes can be developed and shared as a common vision.","PeriodicalId":447143,"journal":{"name":"2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127174095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

EFEA 2018 Proceedings

2018 5th International Symposium on Environment-Friendly Energies and Applications (EFEA) Pub Date : 2018-09-01 DOI: 10.1109/efea.2018.8617043

引用次数: 0