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Assessment of Energy Requirement of a Proposed Electric Railway System in Southern Sri Lanka 斯里兰卡南部拟建电气化铁路系统的能源需求评估
SLEMA Journal Pub Date : 2022-12-31 DOI: 10.4038/slemaj.v25i1.36
H. H. D. Nalin, J. Jayamaha
{"title":"Assessment of Energy Requirement of a Proposed Electric Railway System in Southern Sri Lanka","authors":"H. H. D. Nalin, J. Jayamaha","doi":"10.4038/slemaj.v25i1.36","DOIUrl":"https://doi.org/10.4038/slemaj.v25i1.36","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117066268","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
Analysis of Artificial Intelligence based Methods For Sensorless Disaggregation of the Residential Electric Power Signals 基于人工智能的住宅电力信号无传感器分解方法分析
SLEMA Journal Pub Date : 2022-12-31 DOI: 10.4038/slemaj.v25i1.34
G. M. Herath, T. D. Thilakanayake, M. Liyanage, C. Angammana
{"title":"Analysis of Artificial Intelligence based Methods For Sensorless Disaggregation of the Residential Electric Power Signals","authors":"G. M. Herath, T. D. Thilakanayake, M. Liyanage, C. Angammana","doi":"10.4038/slemaj.v25i1.34","DOIUrl":"https://doi.org/10.4038/slemaj.v25i1.34","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124089598","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
Rooftop Solar Photovoltaic-based Clean Development Mechanism for Sri Lanka 斯里兰卡基于屋顶太阳能光伏的清洁发展机制
SLEMA Journal Pub Date : 2022-12-31 DOI: 10.4038/slemaj.v25i1.35
D. Jayathunga, T. Wickramarathna, H. Karunathilake, S. Witharana
{"title":"Rooftop Solar Photovoltaic-based Clean Development Mechanism for Sri Lanka","authors":"D. Jayathunga, T. Wickramarathna, H. Karunathilake, S. Witharana","doi":"10.4038/slemaj.v25i1.35","DOIUrl":"https://doi.org/10.4038/slemaj.v25i1.35","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116797344","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
What Guarantee can be given for the Electrical Power Output from a Fixed Rooftop Solar Installation? 如何保证屋顶固定太阳能装置的电力输出?
SLEMA Journal Pub Date : 2021-12-31 DOI: 10.4038/slemaj.v24i2.30
J. Lucas
{"title":"What Guarantee can be given for the Electrical Power Output from a Fixed Rooftop Solar Installation?","authors":"J. Lucas","doi":"10.4038/slemaj.v24i2.30","DOIUrl":"https://doi.org/10.4038/slemaj.v24i2.30","url":null,"abstract":"Commercial and residential rooftops commonly use solar photovoltaic systems to reduce their electricity bills and to supply excess electricity to the grid. However, the fluctuations in irradiation, sometimes drastic, limits them to be regarded not as supplying capacity, but only energy to the electricity grid. A knowledge of these daily and monthly achievable targets will help supply authorities to consider solar energy as adding a partial capacity to the grid. This paper quantises the daily and monthly solar electricity production from fixed solar installations. Analysis is based on actual data from a 4.16 kWp rooftop solar system in Mount Lavinia, Sri Lanka [1]. Results of the present study show that the average energy produced during a given month can be estimated somewhat accurately, but there may be large daily variations even within a given week. Since accurate statistics from a real site are not freely available, no payment is made for capacity provided even for the large solar producers, as supply authorities have to plan generation schedules without a knowledge of the likelihood of such variations. Results of the study show that while 90% of the maximum solar energy production can be guaranteed for any month on only 17% of the days, 70% of the possible energy can be supplied on 60% of the days. The days on which less than 10% of the possible energy can be supplied is less than 2%. These results can be made use of to offer a partial capacity payment to rooftop solar producers. Further, knowledge of month-based statistics would be able to provide better guarantees on availability of solar energy.","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129190799","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
Study on Household Expenditure on Utility Services in Sri Lanka 斯里兰卡家庭公用事业服务支出研究
SLEMA Journal Pub Date : 2021-12-30 DOI: 10.4038/slemaj.v24i2.32
M. Wickramarathna, Chathuri Gamage
{"title":"Study on Household Expenditure on Utility Services in Sri Lanka","authors":"M. Wickramarathna, Chathuri Gamage","doi":"10.4038/slemaj.v24i2.32","DOIUrl":"https://doi.org/10.4038/slemaj.v24i2.32","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126402187","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
Mitigating Voltage Violations Caused by Rooftop Solar PV Systems in LV Distribution Networks: A Case Study 减轻屋顶太阳能光伏系统在低压配电网中的电压违规:一个案例研究
SLEMA Journal Pub Date : 2021-12-30 DOI: 10.4038/slemaj.v24i2.29
P. Guneratne, A. Antony, A. W. H. S. Abeygunaseakara, R. Rathnayake, T. M. N. P. Jayawardana
{"title":"Mitigating Voltage Violations Caused by Rooftop Solar PV Systems in LV Distribution Networks: A Case Study","authors":"P. Guneratne, A. Antony, A. W. H. S. Abeygunaseakara, R. Rathnayake, T. M. N. P. Jayawardana","doi":"10.4038/slemaj.v24i2.29","DOIUrl":"https://doi.org/10.4038/slemaj.v24i2.29","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133035957","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
Electrical Transmission and Distribution Loss Targets for Sri Lanka 2021 - 2025 斯里兰卡2021 - 2025年输配电损耗目标
SLEMA Journal Pub Date : 2021-12-30 DOI: 10.4038/slemaj.v24i2.31
Sumadhurie Hansika, S. Subasinghe, M. S. I. Ahmed, Pabasara Weesinghe, T. Siyambalapitiya
{"title":"Electrical Transmission and Distribution Loss Targets for Sri Lanka 2021 - 2025","authors":"Sumadhurie Hansika, S. Subasinghe, M. S. I. Ahmed, Pabasara Weesinghe, T. Siyambalapitiya","doi":"10.4038/slemaj.v24i2.31","DOIUrl":"https://doi.org/10.4038/slemaj.v24i2.31","url":null,"abstract":"Losses in transmission and distribution network is not only a technical loss but also an economic loss. However, it is hard to eliminate these losses, but they could be minimized by network improvements and proper management. Therefore, it is important to encourage transmission and distribution licensees to minimize their respective losses. Declaring allowed loss or a loss target by the regulator is one way to encourage. This paper describes a scientific approach to establish electricity transmission and distribution loss targets for Sri Lanka during the period from 2021 to 2025. This study concludes that a target loss of 7.23% of net generation is feasible for year 2025 in Sri Lanka’s transmission and distribution network.","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"377 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132776690","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
Advantages and Design Considerations of Biomass Gasifier Chp Systems and the Mass and Energy Balance of the Enerfab Tm -Wbg 7.5© System 生物质气化炉热电联产系统的优势和设计考虑及Enerfab Tm -Wbg 7.5©系统的质量和能量平衡
SLEMA Journal Pub Date : 2021-11-30 DOI: 10.4038/slemaj.v24i1.26
I. Gallage
{"title":"Advantages and Design Considerations of Biomass Gasifier Chp Systems and the Mass and Energy Balance of the Enerfab Tm -Wbg 7.5© System","authors":"I. Gallage","doi":"10.4038/slemaj.v24i1.26","DOIUrl":"https://doi.org/10.4038/slemaj.v24i1.26","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130566337","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
Demand Management at Households in Sri Lanka through Dynamic Pricing and Demand Information Systems 通过动态定价和需求信息系统进行斯里兰卡家庭需求管理
SLEMA Journal Pub Date : 2021-03-30 DOI: 10.4038/slemaj.v24i1.27
G. A. Canistus, N. Sakthivelnathan, N. Thiruparan, D. Jayasinghe, T. Siyambalapitiya
{"title":"Demand Management at Households in Sri Lanka through Dynamic Pricing and Demand Information Systems","authors":"G. A. Canistus, N. Sakthivelnathan, N. Thiruparan, D. Jayasinghe, T. Siyambalapitiya","doi":"10.4038/slemaj.v24i1.27","DOIUrl":"https://doi.org/10.4038/slemaj.v24i1.27","url":null,"abstract":"","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124175012","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
Community Agreement on Social and Environmental Impacts of Mini Hydro Power Generation: A Case Study 小型水力发电对社会和环境影响的社区协议:一个案例研究
SLEMA Journal Pub Date : 2021-03-30 DOI: 10.4038/slemaj.v24i1.22
Amashani Kariyawasam, B. Thoradeniya
{"title":"Community Agreement on Social and Environmental Impacts of Mini Hydro Power Generation: A Case Study","authors":"Amashani Kariyawasam, B. Thoradeniya","doi":"10.4038/slemaj.v24i1.22","DOIUrl":"https://doi.org/10.4038/slemaj.v24i1.22","url":null,"abstract":"Renewable energy sources are promoted under the Sustainable Development Goals. In Sri Lanka, the currently harnessed renewable energy sources include about 350 MW of mini hydropower plants developed by private investors. This case study attempts to establish views of the public living in the neighbourhood of a mini hydropower plant on the social and environmental impacts during the construction phase and the operation phase. This power plant belongs to the category “mini hydropower developed by private sector investors and supplying to the national grid”. The study uses a literature survey and a questionnaire survey on a sample of the neighbouring villagers to collect data. Inferences were drawn, at 5% level of significance, on the views of the population using statistical methods. It is found that in this case study, the majority of the public (i.e., over 50% population) agree that there are positive impacts by mini hydropower plants such as generation of new employment, and further agree that some of the major negative impacts discussed in some other cases are not experienced by them.","PeriodicalId":220071,"journal":{"name":"SLEMA Journal","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117263499","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
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