F. Kurokawa, Y. Furukawa, T. Higuchi, A. Katsuki, I. Colak
{"title":"A novel two-compensation digital control DC-DC converter","authors":"F. Kurokawa, Y. Furukawa, T. Higuchi, A. Katsuki, I. Colak","doi":"10.1109/ICRERA.2014.7016482","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016482","url":null,"abstract":"The purpose of this paper is to present a digital control method which suppresses the delay-time for the switching power supplies. The operation part of power supply has two controllers as the fast PD and the conventional PID, which are processed in parallel. Therefore, the fast PD control can improve the transient response of switching pulses. Obtained simulation results show that the proposed method can improve the transient response compared with the conventional PID control method. It is confirmed that 39% and 28% improvements have been obtained for undershoot and convergence time respectively.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132479181","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}
M. Chiandone, R. Campaner, A. M. Pavan, G. Sulligoi, P. Mania, G. Piccoli
{"title":"Impact of Distributed Generation on power losses on an actual distribution network","authors":"M. Chiandone, R. Campaner, A. M. Pavan, G. Sulligoi, P. Mania, G. Piccoli","doi":"10.1109/ICRERA.2014.7016537","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016537","url":null,"abstract":"Distributed Generation (DG) operating in a distribution network influences active power losses. In this paper power losses have been estimated for an actual low voltage distribution network and compared for different situations according to the DG penetration and placement of the power units. A practical method to place new DGs is presented. The basic idea is to minimize power losses, while complying voltage network limits, calculated with power flows using historical data over a discrete number of possible points of connection.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131544585","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":"Interconnection between different DC technologies at multi-terminal HVDC network","authors":"A. M. Omran, K. Ahmed, M. Hamad, I.F. Al-Arabawy","doi":"10.1109/ICRERA.2014.7016573","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016573","url":null,"abstract":"The interconnection between line commutated converter (LCC) and voltage source converter (VSC) at multiterminal HVDC network introduces a challenge especially during power reversal operation. LCC changes the direction of voltage and keeps the current at the same direction, however VSC changes the direction of current and keeps the voltage at the same polarity. In this paper, a control system for LCC and VSC integration is presented. Bidirectional DC/DC converter is proposed to connect LCC and VSC HVDC systems in normal and power reversal conditions. DC/DC Converter structure and controls are presented including the converter connection. MATLAB/SIMULINK simulations are carried out to verify proposed system performance converter operation in different conditions.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130697456","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}
Evren Meltem Toygar, Alper Yazar, Tufan Bayram, M. Taştan, Ömer Kaya, O'uzhan Das, Huseyin Calmaz
{"title":"Design and development of solar flat mirror and heat storage system","authors":"Evren Meltem Toygar, Alper Yazar, Tufan Bayram, M. Taştan, Ömer Kaya, O'uzhan Das, Huseyin Calmaz","doi":"10.1109/ICRERA.2014.7016499","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016499","url":null,"abstract":"Design and development of low cost flat mirror system that produce electricity and heat, and heat storage are described in this paper. Basically, the system is related with Concentrated Solar Power (CSP) technology. Electricity and heat are both produced by water that circulates in system. In this paper, it has been focused on reducing cost, providing wide range use and construct more light system when compared with Solarux CSP. For this purpose, computer aided design programs are used briefly.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131243910","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":"Research on operation optimization strategy of grid-connected PV-battery system","authors":"W. Cao, Yang Du, X. Qi, Li-xin Ji","doi":"10.1109/ICRERA.2014.7016569","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016569","url":null,"abstract":"The optimization strategy is proposed for the grid-connected PV-battery system in order to gain the maximum benefit. The proposed operation optimization is performed in two steps. In the first step, active power optimization is applied, which is aimed at the minimum operation cost (or the maximum system benefits). In the second step, reactive power optimization is applied based on the result of active power optimization, aimed at the minimum network loss. The charge-discharge cycle constraints and power limit constraints are considered in the battery model. IEEE-30 network is used for case study. Two kinds of electricity price schemes are used to examine the effect of the proposed operation optimization strategy.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133017282","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":"Electrical responses of piezoelectric device","authors":"A. M. Ishak, M. N. Elya, M. T. Ishak, N. Daud","doi":"10.1109/ICRERA.2014.7016492","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016492","url":null,"abstract":"Energy harvesting from human motion by using piezoelectric element plays an important role in the development of renewable energy technology. The energy harvesting mechanism includes the process of extracting the renewable energy, converting it into usable electricity and then storing the energy as in capacitor. Piezoelectric element is used as a sensor to convert mechanical energy into electrical energy. The electrical power supply can be used for electronic devices and other mobile applications. The element is capable in converting mechanical energy from the motion of human body, such as walking and running activities, into electrical energy. In this research, a prototype of piezoelectric energy harvesting was developed. Piezoelectric disk-type sensor was installed inside a shoe of officer cadets to harvest the mechanical force from the walking motion. The experimental work was tested for five different weights (48 kg, 59 kg, 62 kg, 71 kg, and 85 kg) of officer cadets on the treadmill with a constant speed of 2 km/h. The piezoceramics material used in this research was lead zirconate titanate (PZT). Before the piezoelectric device was tested on the cadets, the effects of single impact (free fall) of different weights (1N, 2N, 3N, 4N, and 5N) on PZT piezo disk were tested and analyzed. The responses of piezoelectric element were analyzed. The results show that the piezoelectric device generates a maximum output voltage of 7.4 V from the walking movement.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123894641","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}
Renato Ely Castro, Luciano Chaves, J. G. Hermes, C. Pereira, F. Líbano
{"title":"Energy management system based on IEC61131 automation project methodology","authors":"Renato Ely Castro, Luciano Chaves, J. G. Hermes, C. Pereira, F. Líbano","doi":"10.1109/ICRERA.2014.7016555","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016555","url":null,"abstract":"This paper describes the structure of a computer aided framework for an energy management system based on an intermediate-level supervision tool - in the context of the automation pyramid - integrated with a software that performs the control application, supported by typical factory floor automation hardware in a distributed system environment. In addition, this platform aims to prioritize, in a scenario of increasing regulation, their adherence to standardization requirements of the energy system model advocated by the ISO50001. For that, it is proposed the systematic development of an automation project, through the adoption of a standardized methodology, to declare and instantiate software elements as functions, function blocks and programs that implement all of the features required by the energy management systems, including the methodology for monitoring and targeting. The implementation of an energy management system in this context results in greater modularization, structuring, reuse, validation, debugging, high software quality, high flexibility and adaptability, lower costs of development and implementation, facilitating user interaction with the system.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114869449","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}
M. Chiandone, G. Sulligoi, F. Milano, G. Piccoli, P. Mania
{"title":"Back-to-back MVDC link for distribution system active connection: A network study","authors":"M. Chiandone, G. Sulligoi, F. Milano, G. Piccoli, P. Mania","doi":"10.1109/ICRERA.2014.7016536","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016536","url":null,"abstract":"Static frequency converters, which are the core element of high voltage direct current transmission systems and FACTS devices, are becoming a mature technology for applications in medium voltage distribution networks. This paper considers a novel device, namely, the back-to-back connector, which provides a medium voltage dc link with control capabilities similar to high-voltage back-to-back VSC-HVDC systems. In this work several aspects of potential applications of back-to-back connectors in a distribution network are presented. The paper describes the background, the technology, the control scheme and regulatory aspects of back-to back connectors. The paper also presents a practical case study consisting of a real-world configuration where two distribution systems with different owners are connected through a medium voltage dc link.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114999508","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":"Storage commitment and placement for an interconnected island system with high wind penetration, Gotland","authors":"A. Erduman, B. Uzunoğlu","doi":"10.1109/ICRERA.2014.7016456","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016456","url":null,"abstract":"The objective of this study is to investigate storage commitment and storage placement problem for island system that has intermittency of wind power generation in a diurnal wind pattern. This objective will be achieved through minimization of cost while conducting Optimal Power Flow (OPF) analysis Fu, Shahidehpour, and Li (2006). In addition to the methodology introduced by Fu et al. (2006) and Wang, Shahidehpour, and Li (2008), impact of storage will be implemented in this model to generation and demand to analysis the dispatching electric storage systems based on different intermittent generation scenarios for an island system while addressing optimal placement. The case studied in this paper which is Gotland Island has a project in place to upgrade the existing power system to a smart grid. Regional weak power grid and a combination of wind power generation, household loads and some major industries puts on challenges on the island grid structure. HVDC connection to the Swedish mainland balances the grid while in an emergency situation, emergency generators in the weak parts of grid are dispatched Ackermann (2005). Storage systems will be addressed through their contributions to demand or generation implemented. Optimal placement of storage will be implemented through the objectives of minimizing cost of generation Bose, Gayme, Topcu, and Chandy (2012) Ghofrani, Arabali, Etezadi-Amoli, and Fadali (2013) while addressing transmission line constraints. The solutions will be analyzed based on scenarios for the hourly volatility of wind power in simulated diurnal scenarios Fu et al. (2006) and Wang et al. (2008). Storage problem will be formulated as part of the cost optimization problem with the relevant power system and equipment constraints.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"30 22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124699263","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}
H. An, Seung Yun Hyeong, Myeong-Ho Choi, S. Bae, I. Seong, Nam Hun Song
{"title":"A study of interconnections between renewable energy source and 22.9kV-Y distribution power system in Korea","authors":"H. An, Seung Yun Hyeong, Myeong-Ho Choi, S. Bae, I. Seong, Nam Hun Song","doi":"10.1109/ICRERA.2014.7016547","DOIUrl":"https://doi.org/10.1109/ICRERA.2014.7016547","url":null,"abstract":"In 2014, the southern part of the Korean Peninsula has 8.6 million poles, 1.25 million km power lines, and 2 million transformers, etc. It is the massive amount of distribution equipments which could cover a round-trip distance from the earth to the moon and 11 turns around the earth. These distribution equipments are spread out like capillaries and supplying power to every corner of the Korean Peninsula. In order to manage these huge power facility efficiently, KEPCO use DAS(Distribution Automation System) to operate distribution power system since 1997. DAS is integrated system that enables to remotely supervise and control breakers and switches on distribution network. Using DAS, we can reduce outage time and power loss. KEPCO has about 160,000 switches, 50%(about 80,000) of switches are automated, and 41 distribution center monitoring&control these switches 24-hour 365 days to get the best efficiency of distribution networks. However, the rapid increasing renewable energy sources become the problem in the efficient operation of distributed power system. (currently 2,400 MW, 75,000 generators operate in distribution power system). In this paper, it suggests the way to interconnect between renewable energy source and distribution power system, and the method of investigation during connection.","PeriodicalId":243870,"journal":{"name":"2014 International Conference on Renewable Energy Research and Application (ICRERA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129909834","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}