Assessment of electricity excess in an isolated hybrid energy system: A case study of a Dangiwada village in rural Nepal

Shrestha, Ashish; Rana, Lalit B.; Singh, Ajay Kumar; Phuyal, Sudip; Ghimire, Anil; Giri, Roshan; Kattel, Roshan; Karki, Kedar; Jha, Shailendra K.

doi:10.1016/j.egypro.2019.02.121

Cited by 24 publications

(19 citation statements)

References 18 publications

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“…As of 2018, around 25% of total population were getting electricity through different DGs developed all around the country. The isolated energy system is found to be a single solution to connect electricity in the rural area, where it is unfeasible to transmit electricity through the national grid [2], [23]. Government of Nepal has developed a number of policies and released subsidy schemes to support the isolated DGs, resulting in sharp growth of energy penetration in rural areas and economic growth of the rural population [186]- [188].…”

Section: A Current Practicesmentioning

confidence: 99%

“…Globally, more than 12.62% of people still do not have access to electricity which corresponds to 22.57% of rural population and 3.01% of urban population in the world [1]. This lack of electricity access, especially in the rural areas, is attributed to the fact that in many countries, national grids have not reached these areas mostly due to the lack of funding or difficult terrains [2]. Further, most of the world's grids rely on centralized large-scale power providers for continuous power supply [3].…”

Section: Introductionmentioning

confidence: 99%

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Peer-to-Peer Energy Trading in Micro/Mini-Grids for Local Energy Communities: A Review and Case Study of Nepal

et al. 2019

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Energy Resources (DERs) are being integrated into the power market by customers rather than large scale energy suppliers, thereby slowly transforming the centralized, unidirectional market to a decentralized, bidirectional market and transitioning customers into prosumers. Various system architectures are used in the real field to coordinate the energy distribution in the micro/ mini-grids integrated with DERs, all of which have their strengths, weaknesses and challenges. Peer-to-peer (P2P) is an emerging architecture in the field of electrical energy trading and Distributed Generation (DG) management that can be applied in local energy markets. This paper focuses on P2P energy trading, with an in-depth discussion on its various operating algorithms, their principles, characteristics, features and scope through state of art review on P2P. Furthermore, the energy system of Nepal is used as a case study in this paper, and the micro/mini-grids of Nepal and their associated challenges, constraints and opportunities for improvement are discussed. Finally, an energy trading model is proposed to address the problems occurring in the specific case of Nepalese energy market.

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Section: A Current Practicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Peer-to-Peer Energy Trading in Micro/Mini-Grids for Local Energy Communities: A Review and Case Study of Nepal

et al. 2019

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“…An optimized hybrid energy system (HES) is quite a promising technique on behalf of cost, power quality and reliability able to provide the electricity to the area where expansion of the national utility's grid system is quite difficult and expensive [44][45][46]. It can be made more efficient and cost-effective by reducing the disadvantages associated with these technologies [41,47]. However, there are other problems as well, such as: low load factor, low diversity factor, low reliability, protection, etc.…”

Section: Distributed Generationmentioning

confidence: 99%

Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems

Shrestha

Kattel

Dachhepatic

et al. 2019

ASI

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The issue of unintentional islanding in grid interconnection still remains a challenge in grid-connected, Distributed Generation System (DGS). This study discusses the general overview of popular islanding detection methods. Because of the various Distributed Generation (DG) types, their sizes connected to the distribution networks, and, due to the concern associated with out-of-phase reclosing, anti-islanding continues to be an issue, where no clear solution exists. The passive islanding detection technique is the simplest method to detect the islanding condition which compares the existing parameters of the system having some threshold values. This study first presents an auto-ground approach, which is based on the application of three-phase, short-circuit to the islanded distribution system just to reclose and re-energize the system. After that, the data mining-decision tree algorithm is implemented on a typical distribution system with multiple DGs. The results from both of the techniques have been accomplished and verified by determining the Non-Detection Zone (NDZ), which satisfies the IEEE standards of 2 s execution time. From the analysis, it is concluded that the decision tree approach is effective and highly accurate to detect the islanding state in DGs. These simulations in detail compare the old and new methods, clearly highlighting the progress in the field of islanding detection.

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“…[4][5][6]. As the nature of Renewable Energy Sources (RES) is fluctuating and highly dependent on weather, the generated energy is also unpredictable, which can be addressed via the integration of storage devices or/ and by interconnecting multiple energy resources [7][8][9]. An optimized hybrid energy system is quite promising techniques on behalf of cost, power quality and reliability to provide the electricity to the area where an expansion of national utility grid system is quite complicated and expensive [10].…”

Section: Introductionmentioning

confidence: 99%

“…An optimized hybrid energy system is quite promising techniques on behalf of cost, power quality and reliability to provide the electricity to the area where an expansion of national utility grid system is quite complicated and expensive [10]. It can be made more efficient and costeffective by reducing the disadvantages associated with these technologies [7]. However, there are other technical issues in isolated energy system such as; low load factor, low diversity factor, less reliability, protection, etc.…”

Section: Introductionmentioning

confidence: 99%

Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review

et al. 2020

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Nepal is a Himalayan country with its 83% of its geography being composed of hills and mountains. Around 22% of the Nepalese population is not receiving electricity through the national power utility and is forced to identify alternative approaches to electrification. The Micro/Mini-Grid (MG) system is one of the promising approaches in terms of cost, reliability and performance for rural electrification, where electrification through national power utility is not techno-economically feasible. However, various issues must be identified and considered during the implementation of MGs in a rural community. In this paper, numerous technical, social and management issues are identified and discussed relating to the implementation and operation of reliable and stable MGs in the Himalayas. To our knowledge, this is the first scientific work that presents a comprehensive review of Himalayan MGs and their associated elements. This article reviews the available research articles, project documents, and Government reports on MG development, from which a clear roadmap is constructed. From the comprehensive study, it is observed that the existing MGs are not adequately designed for the specific area, considering the local resources and local information. Based on the identified issues, some practical and efficient recommendations have been made, so that future MG projects will address the possible problems during the design and implementation phase.

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Assessment of electricity excess in an isolated hybrid energy system: A case study of a Dangiwada village in rural Nepal

Cited by 24 publications

References 18 publications

Peer-to-Peer Energy Trading in Micro/Mini-Grids for Local Energy Communities: A Review and Case Study of Nepal

Peer-to-Peer Energy Trading in Micro/Mini-Grids for Local Energy Communities: A Review and Case Study of Nepal

Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems

Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review

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