A. Annuk, M. Hovi, Janar Kalder, T. Kabanen, R. Ilves, M. Märss, B. Martinkauppi, P. Miidla
{"title":"Methods for Increasing Shares of Self-Consumption in Small PV Solar Energy Applications","authors":"A. Annuk, M. Hovi, Janar Kalder, T. Kabanen, R. Ilves, M. Märss, B. Martinkauppi, P. Miidla","doi":"10.1109/ICRERA49962.2020.9242902","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242902","url":null,"abstract":"The article analyses the possibilities of increasing PV electricity self-consumption, based on the data of a residential house. This is important for producing electricity from a PV station to the microgrid; to reduce the amount of electricity purchased from the grid, also to replace part of the electricity consumed with the electricity produced by the PV station. The article uses a previously measured consumption graph of an average Estonian residential house, which separately displays the consumption of hot water and non-shiftable load (white goods, lighting, TV set, etc.). The production graph of the PV station is the measured production of 2.5 kW solar station scaled to the annual consumption of this case. To increase the share of solar electricity in consumption, load shifting technology has been used, with both water and batteries deployed as storage devices. The PV station production and consumption data are recorded at 5-minute averaging intervals. The research aims to find the optimal capacity of the hot water tank and the battery, provided that the excess energy is stored after the non-shiftable load in both the boiler and the battery. In the case of a non-shiftable load energy deficit, it is provided from the battery, if there is a supply available. The energy production, scaled to equal the consumption, of the PV station was 3472 kWh / year, which was the basis for the energy capacity of 5 kWh for the optimized hot water tank and 3 kWh for the battery. In these conditions, the value of the demand cover factor is 0.657. Without storage devices, it would be 0.152. These results are scalable to bigger or smaller solutions.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127587537","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":"A Comprehensive Review of Islanding Detection Methods for Distribution Systems","authors":"Kianoush Naraghipour, K. Ahmed, C. Booth","doi":"10.1109/ICRERA49962.2020.9242850","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242850","url":null,"abstract":"The rapid increasing of Distributed Generators (DGs) in electric power system necessitate updating of the grid interconnection requirements, particularly with penetration of microgrids (MGs), which accelerate the transforming to decentralization of the networks. Accordingly, the fast detection of an unintentional islanding has a key role in the future energy scenarios, both for the DGs that operate in grid-connected mode and for the MGs with a reliable facility for transition into the island mode. This paper introduces a modified classification for islanding detection methods in literature, which categories them into single inverter-based, multi inverter-based, AC microgrid and DC microgrid. Also, the performance of inverter-based (single & multi) under a wide range of existing islanding detection methods (IDMs) is evaluated along with their advantages/disadvantages and considering which of them are able to work with AC MGs. Furthermore, IDMs for DC MGs are discussed.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125043542","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}
Rovick Tarife, Y. Nakanishi, John Vincent S. Bondaug, Regielon V. Irosido, A. Tahud, N. Estoperez
{"title":"Optimization of Electric Transmission Line Routing for a Renewable Energy Based Micro-Grid System using Geographic Information System (GIS) Spatial Analysis","authors":"Rovick Tarife, Y. Nakanishi, John Vincent S. Bondaug, Regielon V. Irosido, A. Tahud, N. Estoperez","doi":"10.1109/ICRERA49962.2020.9242762","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242762","url":null,"abstract":"In this study, GIS spatial analyst tools are used to implement an alternative method of electric transmission line (ETL) routing for a renewable energy-based microgrid system. Multiple criteria, starting points and endpoints were identified and a weighted ranking system and suitability index for geographic factors were utilized to create the cost surface. A modified method from the Electric Power Research Institute-Georgia Transmission Corporation (EPRI-GTC) is also adopted for the overhead electric transmission line siting and necessary changes were applied based on the available data and authors’ review on the study area. After applying the Least Cost Path (LCP) algorithm, the results produced three alternative routes based on three perspectives: the built environment, natural environment, and engineering environment. The alternative routes are then overlaid based on a simple combined perspective to create the final route. Moreover, the alternative routes are evaluated to provide a secondary route and the routes developed by engineering perspective were nominated.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"109 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114009162","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}