{"title":"Determining lead-acid battery DC resistance by tremblay battery model","authors":"D. Freitas, A. M. N. Lima, Marcos R. A. Morais","doi":"10.1109/IREC.2016.7478944","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478944","url":null,"abstract":"Internal resistance measurement of a lead-acid battery is discussed. A criterion based on the battery model discharge equation is used to determine the value of internal resistance. The mathematical model chosen to represent the electrochemical battery and the methods of calculating the internal resistance of a battery is shown. A simulation study is used to demonstrate the feasibility of this measure resistance.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122884049","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}
{"title":"Impact of the STATCOM on the terminal voltage of a wind farm of Bizerte in Tunisia","authors":"R. Karoui, M. Zoghlami, F. Bacha","doi":"10.1109/IREC.2016.7478924","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478924","url":null,"abstract":"In this paper we study the impact of a STATCOM on the terminal voltage of a wind farm. As application case, we study the wind farm of Bizerte (north of Tunisia). This farm is composed of fixed speed wind turbines using squirrel cage induction generators (SCIG). We describe the wind turbine system and the technical requirements for wind generators connection to the grid and held at the voltage dips (Low Voltage Ride- Through: “LVRT”) according to STEG (Tunisian Company Electricity and Gas), then the structure and the modeling of the STATCOM are presented. Finally, we simulate the STATCOM impact on the terminal voltage of the wind farm in the case of 20% voltage dips of the terminal voltage.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122889390","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}
{"title":"Modeling and control of PV/Wind Microgrid","authors":"A. Khalil, Khalid Ateea Alfaitori, A. Asheibi","doi":"10.1109/IREC.2016.7478916","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478916","url":null,"abstract":"Microgrids are becoming the de facto for future power system. This paper presents the modeling and control of PV/Wind Microgrid. Renewable energy sources such as PV, wind and fuel cells are usually connected through voltage-source inverters. In order to share the same loads these inverters are connected in parallel to form a Microgrid. The system considered in the paper consists of two parallel inverters fed with PV array and wind turbine. The PV array and the wind turbine are variable nonlinear DC sources and hence the control system should achieve good power sharing even with this imperfections. The controller is designed in the dq reference frame where the Space Vector Pulse Width Modulation is used. The first inverter contains outer voltage control loop and inner current control loop while the second inverter contains only power control loop. The controller is tested through simulation where the PV array and the wind system produce different DC levels. The simulation results show that the power sharing is achieved.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123508763","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}
{"title":"Optimal solar panels positioning for Beirut","authors":"E. Sassine","doi":"10.1109/IREC.2016.7478940","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478940","url":null,"abstract":"Determining the optimal position of the solar collectors is essential for the maximum benefit of solar energy received by the solar panels and facilities including large sizes such as concentrated solar energy systems or large-scale solar photovoltaic installations. In this paper we study the optimal position for solar sensors located in Beirut (33.89; 35.50) in 3 configurations: constant optimal angle; Monthly variable tilt angle; and solar sensors with a tracking system of the solar race. After validating the numerical model comparing it to a weather file data for normal, diffused, and global horizontal average hourly solar radiation per month; optimization was made to determine the optimal position of solar collectors according the Generalized Reduced Gradient (GRG2) Algorithm which is normally used for optimizing nonlinear problems. The results show that the optimum angle of inclination for the city of Beirut is close to 30° (27.9°). By varying this angle monthly (i.e. through an adjustable tilt chassis), a 6% increase of collected energy is obtained compared to a constant optimal angle. As for the system, it has great interest as it allows an increase of 37% of solar energy compared to a constant optimal angle. The method adopted is of great interest since it could be applied to any region, not just in Beirut by changing the latitude parameter and the clearness index for the site concerned.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121664158","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}
{"title":"Using quasi-static model for water/power management of a stand-alone wind/photovoltaic/BWRO desalination system without batteries","authors":"Ines Ben Ali, M. Turki, J. Belhadj, X. Roboam","doi":"10.1109/IREC.2016.7478871","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478871","url":null,"abstract":"This paper is focused on modeling and energy management of one particular type of Brackish Water Reverse Osmosis (BWRO) desalination unit: a small-scale unit installed in remote areas. This kind of system, involving several water subsystems (hydro-mechanical processes), is powered by an intermittent energy source (PV-Wind turbine) via a DC bus. Such an autonomous system is characterized by a hydraulic storage instead of an electric storage. This issue has been dealt with through a specific Energy Management (EM) strategy. The latter enables to manage simultaneously the power and water flows in the hydro-mechanical subsystems. For this purpose, a quasi-static modeling has been proposed for the hydromechanical processes. This model has been validated through an experimental characterization of a BWRO desalination experimental test bench. The EM simulation results have been provided to show the correct operation of the desalination unit with the given rule-based-power sharing strategy.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"453 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114795920","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}
Abdalbaset M. Mnider, D. Atkinson, M. Dahidah, M. Armstrong
{"title":"A simplified DQ controller for single-phase grid-connected PV inverters","authors":"Abdalbaset M. Mnider, D. Atkinson, M. Dahidah, M. Armstrong","doi":"10.1109/IREC.2016.7478941","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478941","url":null,"abstract":"Synchronous dq-frame controllers are generally accepted due to their high performance compared to stationary αβ-frame ones, as they operate on dc quantities, achieving zero steady-state error. In single-phase systems, however, PI-based dq controllers cannot be directly applied due to the reduced number of input signals available compared to three-phase systems. The common approach in single-phase systems is to create a synthesized phase signal orthogonal to the fundamental signal of the single-phase system so as to obtain dc quantities by means of (αβ to dq) transformation. The orthogonal components in conventional approaches are usually obtained by phase shifting the real signals by a quarter of the fundamental period. The introduction of such delay in the system deteriorates the dynamic response, which becomes slower and oscillatory. In this paper, an alternative dq controller scheme which referred as to simplified dq controller is proposed. The proposed scheme does not require orthogonal quantities to be generated, making it easier to be implemented. The simplified dq control method is experimentally compared to the conventional delay-based dq control method and shown to improve the poor dynamics of the conventional approach while not adding excessive complexity to the controller structure. A single-phase five-level diode-clamped grid-connected PV inverter is considered as an example in this paper.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121722075","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}
Mohamed Chafie, Mohamed Fadhel Ben Aissa, A. Farhat, A. Guizani
{"title":"Design, manufacturing and performance evaluation of a new parabolic trough collector","authors":"Mohamed Chafie, Mohamed Fadhel Ben Aissa, A. Farhat, A. Guizani","doi":"10.1109/IREC.2016.7478872","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478872","url":null,"abstract":"In this work, a parabolic trough collector system with aperture area of 10.66 m2 was designed, manufactured and evaluated. The experimental study was conducted and realized in the Research and Technology Center of Energy (CRTEn) in Tunisia. In order to evaluate the thermal performance of the PTC, many experimental tests were carried out in keeping with the ASHRAE 93-1986 standard. The intercept and the slope given by the collector's efficiency curve were found to be 0.5586 and 0.3199, respectively. In this context, an experimental performance investigation of typical days (sunny and cloudy days) is presented. The results show that the average thermal efficiency for sunny and cloudy days is found to be 41.63% and 29.3%, respectively and the average useful heat gain are 255.91 W/m2 and 173.78 W/m2 for the sunny and cloudy days, respectively.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129919922","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}
D. Koussa, Y. Bouchahma, M. Koussa, S. Bellarbi, A. Boufertella
{"title":"Simulation of a wind generator coupled to adiesel generator","authors":"D. Koussa, Y. Bouchahma, M. Koussa, S. Bellarbi, A. Boufertella","doi":"10.1109/IREC.2016.7478948","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478948","url":null,"abstract":"The presntwork concerns a simulation of a combined wind generator system, a storage system and a diesel generator, designed to supply a household load located in Bouzaréah site. Furtheremore, the designed system must be able to satisfy the needs with some guarantee of autonomy. So, to ensure better management of the system, energy models have been developed for the determination of the power which can be provided by the sub systems under specified weather conditions. The simulation of the various sub systems was performed using MATLAB. A complementary study was developed through the HOMER software. Firstly, this study allowed us to size and select the most optimal system based on two parameters, namely the cost and effectiveness. Secondly from the environmental perspective, this study allowed us to highlight the role of the use of wind power in reducing emissions of greenhouse gases.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128104636","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}
{"title":"Fuzzy pitch angle control for grid connected variable-speed wind turbine system","authors":"Mouna Ben Smida, A. Sakly","doi":"10.1109/IREC.2016.7478955","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478955","url":null,"abstract":"This paper studies the control of a grid connected variable-speed wind turbine control using the permanent magnet synchronous generator. A pitch angle controller based on the fuzzy logic is proposed for adjusting the wind turbine aerodynamic torque when wind speed is above rated speed. The fuzzy logic controller is effective to compensate the nonlinear characteristic of the pitch angle to the wind speed. The proposed method effectiveness is verified by MATLAB simulation results.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125521136","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}
{"title":"Parametric study of mult-effect desalination with thermal vapour compression plant","authors":"N. Eshoul, B. Agnew, Abdalbaset M. Mnider","doi":"10.1109/IREC.2016.7478864","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478864","url":null,"abstract":"Desalination is a method of producing water from sea or brackish water for drinking, Industry, and irrigation in arid and semi-arid countries, multi-effect desalination with thermal vapour compression (MED-TVC) is a thermal desalination process which has high exergy efficiency compared to other thermal processes. This paper presents the parametric study of a proposed plant modelled using the IPSEpro software package which was validated against data from Kish Island 1536 t/d operational data, where very good agreement between the model results and operational data were found. Then the model was scaled up to produce 24000 t/d to provide fresh water to Zawya City in Libya. The results show that as seawater temperature and salinity increases, exergy efficiency and GOR also increase, and the exergy destruction associated with the steam ejector was around 40%. In addition, the effect of number of effects was investigated, and the results showed that as number of effects increases the exergy efficiency and GOR increase.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"40 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130333736","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}