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综合能源系统中混合储能系统的配置优化可以一定程度上提高系统的整体能源利用率和运行可靠性,对区域内的能量协调规划具有重要意义。建立了一种由超级电容、锂电池、压缩空气储能构成的综合能源系统中的混合储能系统,分析3种储能方式的不同性能特征,建立各个储能系统的数学模型。基于滑动平均法的原理,采用二次移动平均滤波法进行功率配置,并基于能量平衡进行容量配置优化,实现了多种储能方式的优势互补,推动综合能量系统的整体高质量运行。 相似文献
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The goal of this study is to find the optimal sizes of renewable energy systems (RES) based on photovoltaic (PV) and/or wind systems for three energy storage system (ESS) scenarios in a micro‐grid; (1) with pumped hydro storage (PHS) as a long‐term ESS, (2) with batteries as a short‐term ESS, and (3) without ESS. The PV and wind sizes are optimally determined to accomplish the maximum annual RES fraction (FRES ) with electricity cost lower than or equal to the utility tariff. Furthermore, the effect of the use of battery and PHS on the electricity cost and FRES are studied. A university campus on a Mediterranean island is selected as a case study. The results show that PV‐wind hybrid system of 8 MW wind and 4.2 MW PV with 89.5 MWh PHS has the highest FRES of 88.0%, and the highest demand supply fraction as 42.6%. Moreover, the results indicate that the economic and technical parameters of RESs are affected significantly by the use of ESSs depending on the type and the capacity of both the RES and the ESS. 相似文献
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In 2017, as part of an effort to reduce CO2 emissions, Korea declared its plan to increase the contribution of renewables from 9% to 33% of its total installed capacity by 2030. To this end, it is crucial to harmonize the existing low CO2 baseload generators (ie, nuclear power plants) with more variable and uncertain generation sources such as photovoltaic (PV) plants. In this study, we propose a nuclear and renewable hybrid energy system (NHES) configuration that combines the nuclear power fleet, PV plants, and industrial demand response (DR) resources, to address technical and economic issues arising from high penetrations of PV capacity. Employing a day-ahead scheduling method, the effectiveness of harnessing industrial DR as energy storage for Korea's nuclear fleet was evaluated with an emphasis on grid flexibility, operation costs, and CO2 emissions. The findings of this study show how the NHES could broaden Korea's affordable low-carbon paths and technical options, which are promising for short-term applications. 相似文献
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Electric Power Research Institute (EPRI) and the US Department of Energy (DOE) have been funding a number of case studies under the initiative entitled “Economic Development through Biomass Systems Integration”, with the objective of investigate the feasibility of integrated biomass energy systems, utilizing a dedicated feedstock supply system (DFSS) for energy production. This paper deals with the full fuel cycle for four of these case studies, which have been examined with regard to the emissions of carbon dioxide, CO2. Although the conversion of biomass to electricity in itself does not emit more CO2 than is captured by the biomass through photosynthesis, there will be some CO2 emissions from the DFSS. External energy is required for the production and transportation of the biomass feedstock, and this energy is mainly based on fossil fuels. By using this input energy, CO2 and other greenhouse gases are emitted. However, by utilizing biomass with fossil fuels as external input fuels, we would get about 10–15 times more electric energy per unit fossil fuel, compared with a 100% coal power system. By introducing a DFSS on former farmland the amount of energy spent for production of crops can be reduced, the amount of fertilizers can be decreased, the soil can be improved and a significant amount of energy will be produced compared with an ordinary farm crop. Compared with traditional coal-based electricity production, the CO2 emissions are in most cases reduced significantly by as much as 95%. The important conclusion is the great potential for reducing greenhouse gas emissions through the offset of coal by biomass. 相似文献
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The inconsistency in the mass production of lithium-ion battery (LIB) packs stem from the inconsistency in the capacity, voltage and internal resistance of single batteries that compose packs. The inconsistency issue of these battery packs can greatly reduce the output performance of a large power pack. This paper proposed the machine learning approach based on self-organization mapping (SOM) neural networks for establishing the consistency of LIBs. This method comprehensively compares and analyzes the real-LIB parameters (internal resistance, capacity and voltage) data obtained during charging and discharging to form the clusters of similar performing LIBs. Experimental result validated the clustering analysis and it indicates that the performance of clustered battery pack typically precedes than that of original. The capacity of clustered battery pack increased 1.9% compared with brand-new pack. The temperature distribution of the battery pack assembled after screening is consistent. The peak temperature is 4°-5° lower than the ordinary battery, and the temperature fluctuation is reduced by 2.6°. In addition, the application of cluster analysis is expanded and some key research directions are pointed out. 相似文献
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Hybrid diesel–PV–battery systems are one of the most cost effective options for off-grid power generation. A methodology for the optimal operation of such systems for an off-grid application is proposed in this paper. The methodology is based on the minimisation of an energy cost function. Based on this function, an optimal operating point for the diesel generator is identified, taking into account the characteristics of the diesel generator, battery bank and converter as well as the costs of fuel and battery usage. The operation of the diesel generator at this optimum operating point results in an overall energy cost reduction for the hybrid diesel–battery system. Simulation analysis shows that the proposed control strategy can achieve up to 4% reduction in the levelised cost of energy. This is mostly due to the savings made from the efficient usage of diesel generator and battery. 相似文献
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The concept of “micro-grids” as self-sustained power systems is driven largely by business models, which have to be developed by considering the perspectives of all the stakeholders. This study tests the feasibility of the Anchor-Business-Community model of off-grid electrification in a cluster of two Hamlets in Uttar Pradesh, from the perspective of a Renewable Energy Service Company. Telecom towers, Flour Mills and rural communities have been considered as the Anchor, Business and community customers respectively. Primary surveys have been carried out to assess socio-economic characteristics, renewable energy resource availability and energy demand. Cost savings has been assumed to be the primary incentive for the customers to switch to clean energy. Cash flow analysis has been done to estimate the level of profitability of the project with and without the current level of subsidy. Solar Photovoltaic systems, Biomass gasification systems and Solar-Biomass hybrid systems have been modelled using HOMER. The model for Solar PV system with subsidy was found to be the most robust out of all three models in the scenario analysis. Solar-Biomass hybrid systems and Biomass Standalone systems are found to have the potential to offer a healthy level of returns under the best case and most likely scenarios. 相似文献
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With the increasing interdependency of electricity and gas, it is necessary to simultaneously investigate electric power system and natural gas system from the perspective of an electricity‐gas integrated energy system (EGIES). As an extension and integration of both optimal power flow (OPF) and optimal gas flow (OGF), optimal energy flow (OEF) is regarded as the cornerstone of the EGIES and lays an essential foundation for further research on the EGIES's operation and analysis considering stochastic conditions and contingency states. The objective of this paper is to develop a generalized mathematical model and a universally applicable simulation tool for the OEF problem. First, natural gas system is modeled in a way similar to electric power system according to electricity‐gas analogy analysis, where gas admittance, gas nodal admittance matrix, and the nodal equation of gas flow conservation are derived. Then, a generalized accurate OEF model is formulated by simultaneously integrating the OPF model and the OGF model as well as their coupling constraints in a unified modeling framework. Furthermore, an available hybrid optimization approach consisting of whale optimization algorithm, MATPOWER, hydraulic calculation iterative program, and nonstationary penalty function method is put forward to solve the OEF problem. The accuracy, feasibility, and applicability of the proposed modeling and solution method is finally demonstrated by analyzing Belgian 20‐node gas system combined with IEEE 30‐bus test system. 相似文献
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Yelda Firat 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2019,41(6):734-745
Electricity energy has a crucial importance role for social and economic developments all over the world. Nowadays, the worldwide generation of electricity mostly depends on conventional sources. These sources are limited in the environment and also responsible for ecological problems like environmental pollution. Renewable energy sources have important aspects such as feasibility, efficiency, and environment-friendly in comparison to conventional energy resources. In order to overcome environmental problems, this proposed study focuses on solar photovoltaic hybrid system for eco-friendly electric vehicle charging and house based on machine learning system. In order to realize numerical study, Homer Pro and PVSOL software are used. Various parameters of economic feasibility, sizing strategies with logical advancements, and optimization methods are numerically considered and analyzed to compare measurement one. 相似文献
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日本新能源的发展趋势会对全球的能源变革产生巨大作用。从第一次石油危机至今,日本的新能源无论是总量还是在能源结构中所占的份额都有了质的飞跃,这不仅是因为新能源的技术和设备有了长足进步,更重要的是来自日本政府能源政策的支持,但2011年的福岛核危机将彻底改变日本的能源格局。日本政府宣布将中止核电发展计划,可再生能源将成为下一步能源发展战略的核心。然而日本的规模化可再生能源过程也面临着如何弥补核电站退役后的电力缺口、国土面积狭小、电网网架薄弱以及因电价过高导致的巨额补贴费用等诸多困难。与此同时也给日本带来了新的发展机遇,可再生能源将成为日本经济新的增长点。日本核危机使全球核能遭遇低潮期,而可再生能源将迎来新的发展机遇,这有可能催生第三次产业革命。同时也认识到,能源来源的过于单一化使得能源风险加剧,需要建立健全的、快速的能源应急机制,加大国际间能源合作,突破能源技术壁垒。此次日本核危机促使中国反思自身的核电发展策略。中国具有丰富的可再生能源资源,当前应抓住这一发展机遇,加大产品技术含量,切勿盲目扩大生产规模,同时拓展非主流型可再生能源生产设备市场。政府要把握整体布局,避免出现区域性生产"过度"。 相似文献
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“双碳”目标和能源转型的大背景下,区域综合能源系统内部耦合关系不断丰富,对于碳排放的管理不断严格,考虑互联协同的分布式能源站低碳规划问题亟待解决。为此,首先讨论了互联协同分布式能源站空间性能参数矩阵;然后计及负荷-能源站的管线建设以及环境成本、能源站-能源站的互联管线长度、各个分布式能源站规划容量等关键因素,提出了一种考虑互联协同的分布式能源站低碳多目标选址规划模型;最后,讨论了负荷不确定性对分布式能源站选址规划的影响,并且基于基准负荷确定性场景,在某城市实际算例中验证并讨论了考虑低碳需求前后各个分布式能源站的选址结果对比。 相似文献
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30kW风光联合电站数据采集系统 总被引：4，自引：0，他引：4
在实用风光联合电站的基础上，进行必要的数据采集和监测，获得足够的当地风能和太阳能资源分布和系统运行状态数据，以便不断改进和调整系统运行状态，达到最佳和最充分地利用当地风能和太阳能的目的，并为今后风光电站的进一步优化设计提供可靠依据。 相似文献
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Surinder Singh Kathiravan Srinivasan Bor‐Yann Chen Harpreet Singh Ankit Goyal Akhil Garg Xujian Cui 《国际能源研究杂志》2019,43(11):5834-5840
Microbial fuel cells (MFCs) are quickly gaining traction in the mainstream industry due to their capabilities in simultaneous power generation and wastewater purification. They use bacteria like Shewanella and Geobacter as primary units for the same. However, their power generation capabilities are limited by a lack of stability in certain configurations. For the development of appropriate power storage and management systems, this instability must be investigated. Therefore, the present study proposes the artificial intelligence (AI) methodology of artificial neural search (ANS) networks to predict the period for stabilization of power generation of microbial fuel cell in the presence of microorganisms. An output voltage has been measured as a function of time (approximately 1600 h). A stabilization period of power generation has been predicted from the slope obtained from the graph of voltage vs time. The analysis of the ANS model indicated that the power generation stabilization has occurred between 12th and 16th weeks. Experiments were then performed to validate the findings from the ANS model. This may serve as an indication for the development of energy management and storage systems that can account for the trends observed during this study 相似文献
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Beatriz Escobar José Hernández Romeli Barbosa Ysmael Verde-Gómez 《International Journal of Hydrogen Energy》2013
The main advantage of the hybrid system compared with separate array solar photovoltaic and stand-alone wind turbine is the possibility of the surplus energy storage by transforming it to hydrogen that can be use in fuel cells. However the design and sizing of this kind of technologies need to meet the local microclimate in order to reach higher efficacies. A tool based on an analytical model to sizing, analyze and assess the feasibility of the hybrid wind/photovoltaic/H2 energy conversion systems using real weather data is presented in this work. The model considers an energy balance analysis and electrical variables of the system components; the tool calculates the subsystems efficacy and proposes the improvements to increase the efficiency of the use in surplus energy produced by the hybrid system. To validate the analytical model, simulation based on wind speed and solar radiation measurements from meteorological monitoring station in a Mexican Caribbean City is discussed. 相似文献
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A potential solution for stand-alone power generation is to use a hybrid energy system in parallel with some hydrogen energy storage. In this paper, a pre-feasibility study of using hybrid energy systems with hydrogen as an energy carrier for applications in Newfoundland, Canada is explained. Various renewable and non-renewable energy sources, energy storage methods and their applicability in terms of cost and performance are discussed. HOMER is used as a sizing and optimization tool. Sensitivity analysis with wind speed data, solar radiation level, diesel price and fuel cell cost was done. A remote house having an energy consumption of 25 kW h/d with a 4.73 kW peak power demand was considered as the stand-alone load. It was found that, a wind–diesel–battery hybrid system is the most suitable solution at present. However, with a reduction of fuel cell cost to 15% of its current value, a wind–fuel cell system would become a superior choice. Validity of such projection and economics against conventional power sources were identified. Sizing, performance and various cost indices were also analyzed in this paper. 相似文献
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冷热电联产系统的发展及前景 总被引：7，自引：0，他引：7
1前言能源的价格、电网的稳定性、能量的品质、空气的品质以及全球气候的改变,是21世纪我们面临的严重问题。随着经济和社会的发展,这些问题将变得更加尖锐。在传统的利用燃料产生电力的过程中,将近三分之二的输入能量没有有效利用就被释放到环境中,能量损失十分严重。利用总能 相似文献
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关于建筑物节能及复合能量系统的几点思考 总被引：28，自引：3，他引：28
建筑节能已成为我国节能技术领域的重要课题，该文从制冷空调以及能量综合利用角度探讨了建筑节能的重要技术问题，并就建筑物复合能量利用系统进行了分析与讨论。 相似文献