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1.
为了解决薄弱电网高比例分布式光伏难以就地消纳问题,提出储能系统和需求侧响应运行策略,建立了计划接入总量下的高比例分布式光伏双层规划模型。以光伏最大消纳为目标函数,光伏安装位置与容量为优化变量,建立上层模型;以系统净负荷峰谷差期望值最小为目标函数,各时段电价为优化变量,建立下层模型。针对光伏随机出力与负荷的时序性,利用拉丁超立方抽样技术对其进行处理。在此基础上,采用概率潮流法与细胞膜粒子群优化算法相结合的混合智能算法对模型进行求解,并以河北省某贫困县光伏扶贫村网架结构为例进行算例分析。结果表明,解决方案在实现光伏接入容量最优配置的基础上,进一步提高了薄弱配电网分布式光伏的消纳能力。双层规划模型能够在很大程度上提高再生能源的利用率,可为配电网规划提供参考。  相似文献   

2.
正分散式风电项目是指位于用电负荷中心附近,不以大规模远距离输送电力为目的,所产生电力就近并网(35千伏及以下),并在当地消纳的风电项目。分散式风电可与用电需求侧有效融合,有利于实施工业绿色制造和终端用能清洁电能替代,支撑绿色工厂、绿色园区的发展。分散式风电与其他品类分布式能源具备一定的互补性,可与光伏、天然气分布式能源、储能等形成良好互动,有利于推动多能互补、微电网等新型能源系统的发展,促进能源开发模式的创新。  相似文献   

3.
单机容量只有15万千瓦致使发电成本高、所处盐城电网受外电困难迫使机组长期运行、企业负担沉重、发展前景不明……盐城发电有限公司(以下简称公司)在极为困难的经营窘境下,不等不靠,向管理的深度挖效益,向经营的广度争效益,控亏减亏取得显著成效.公司在2011年减少亏损5000万元后,2012年1~7月又通过优化"四电"、精管"六煤"、严控"四费"等得力措施,同比减少亏损5700多万元. 优化"四电",提高电量收益 电量.公司按照"少发电,多替代,抓指标,控成本,尽最大努力减亏"的经营管理策略,主动加强与江苏省经信委和江苏省电网交易中心等上级主管部门的沟通联系,针对煤炭市场和替代发电收益情况,在区域负荷允许的情况下,努力争取单机运行,多安排替发电量.同时,及时加强与江苏省电力调度控制中心的协调,在争取机组于经济负荷区运行的同时,控制自发电量,为全年多替代电量腾出空间.2012年1~7月完成被替代电量9亿千瓦时,创造效益4717万元.目前,公司正朝着全年被替代电量超17亿千瓦时的目标努力.  相似文献   

4.
随着光伏发电设备价格的下降和国家相关补贴政策的颁布,分布式光伏发电必将迎来迅速的发展。接入用户侧的光伏发电可以就地补偿负荷,受其固有时变特性和负荷波动影响,光伏发电功率的消纳存在动态过程,传统的静态渗透率指标不能全面反映配电网对光伏发电的消纳能力。文章通过建立配电网对光伏发电消纳能力的新指标,以典型建筑功能区为例进行了模拟测算。根据测算结果分析了影响分布式光伏发电消纳能力的因素及其对配电网建设改造的影响,并对光伏示范区建设提出了建议。  相似文献   

5.
电力市场化改革是推动我国能源生产和消费革命的重要体制性保障。从当前实践看,我国电力市场建设的主要矛盾和难点在于跨省区的电量消纳和电力平衡。由于我国电力资源富集区与用电负荷中心普遍呈逆向分布特征,大多数省份的电力生产和消费都难以自我平衡,遇到电力供需严重失衡时更是难以独善其身。因此,新增的电力装机和电量,无论是火电水电等传统势力,还是风电光电等市场新贵,都面临跨省区消纳的客观需求和现实压力。尤其是西南水电和"三北"及西部地区的风光发电,很大比例都要输到外省区消纳。  相似文献   

6.
为实现零碳建筑的零碳排放和超低能耗目标,提出了零碳建筑的技术路线。利用负荷能耗指标作为技术评价标准,以保定市某幼儿园实际工程为例,通过DeST软件模拟,分析了本项目全年负荷变化,冷热负荷指标以及负荷能耗指标,然后通过正交试验与极差分析得出不同影响因素对建筑热负荷的影响程度。结果表明,零碳幼儿园全年累计热负荷指标为61.60 kW·h/m~2,全年累计冷负荷指标为75.99 kW·h/m~2,采暖季热负荷指标为18.36 W/m~2,空调季冷负荷指标为25.76 W/m~2;不同影响因素对建筑热负荷的影响程度从大到小依次为外墙传热系数人员密度设备功率屋顶传热系数,对建筑冷负荷影响程度从大到小依次为人员密度设备功率外墙传热系数屋顶传热系数。零碳建筑技术路线的运用对于降低建筑能耗、实现建筑零碳目标具有重要意义。  相似文献   

7.
作为我国第一个正式运行的省级电力市场,内蒙古电力多边交易市场(简称“电力多边市场”)一直是国家相关部委和内蒙古自治区政府共同开展电力市场化改革探索的试验区,2010年,在全国首创“多方参与、双向竞争、价差传导”的市场模式,2015年在全国率先开展新能源柔性打捆交易,缓解风火和光火矛盾,促进新能源的电量消纳,2022年,在全国率先开展现货市场“一轨制”全电量集中优化,降低系统发电成本,促进新能源的电力消纳。  相似文献   

8.
为实现零碳建筑的零碳排放和超低能耗目标,提出了零碳建筑的技术路线。利用负荷能耗指标作为技术评价标准,以保定市某幼儿园实际工程为例,通过DeST软件模拟,分析了本项目全年负荷变化,冷热负荷指标以及负荷能耗指标,然后通过正交试验与极差分析得出不同影响因素对建筑热负荷的影响程度。结果表明,零碳幼儿园全年累计热负荷指标为61.60 kW·h/m~2,全年累计冷负荷指标为75.99 kW·h/m~2,采暖季热负荷指标为18.36 W/m~2,空调季冷负荷指标为25.76 W/m~2;不同影响因素对建筑热负荷的影响程度从大到小依次为外墙传热系数>人员密度>设备功率>屋顶传热系数,对建筑冷负荷影响程度从大到小依次为人员密度>设备功率>外墙传热系数>屋顶传热系数。零碳建筑技术路线的运用对于降低建筑能耗、实现建筑零碳目标具有重要意义。  相似文献   

9.
正储能是新型电力系统的重要组成,能够在一定程度上促进新能源发展,平抑新能源的波动性,提高新能源上网电量比重。近年来,配备储能的新能源项目容易获得优先审批、优先并网、优先发电,储能已经成为新建风电与光伏发电项目的重要组成部分。新型电力系统与"新能源+储能"模式的关系、"新能源+储能"模式的盈利来源、"新能源+储能"模式面临的挑战,都是需要重点研究的课题。  相似文献   

10.
南宁供电局在开展节能服务"绿色行动"中,为客户排忧解难,认真落实低谷电力优惠政策,大力推广电力蓄能技术,利用电力价格杠杆合理调整需求侧用电负荷和时间,开创了供电企业保增长、用电客户降成本、全社会节能减排多方共赢格局。  相似文献   

11.
Germany’s energy turnaround is leading to an increasing integration of photovoltaics (PVs) throughout its distribution grid. To ensure safe grid operation in times of high solar radiation, PV plants must either be throttled back to comply with the feed-in limitation or store a portion of their excess electricity in batteries. This paper presents a grid-optimized operating strategy for PV storage systems based on a Fuzzy Logic Controller that reduces peak feed-in and thus also PV curtailment losses. The Fuzzy Logic Controller uses data on PV power surplus and battery charge level as input variables. To obtain good results, the set of numerical parameters of the membership functions is enhanced by evolutionary programming.The energetic assessment shows that even small electrical storage capacities (<<5?kWh) reduce curtailment losses considerably when using the grid-optimized operating strategy. The economic assessment shows that, in 2016, investments in PV storage systems with large PV plants and small batteries have small (positive) Internal Rates of Return. The system efficiency of the battery storage has a small impact on the profitability of PV storage systems, whereas the cycle stability and the electricity purchase price have a large impact. Moreover, there is an economic benefit for plant operators to switch from the simple to the grid-optimized operating strategy. Solar forecast inaccuracies and variations in load and generation profiles have a negligible impact on the performance of the control algorithm.  相似文献   

12.
Global energy and environmental problems are increasing in severity. Countries worldwide are more concerned about and are paying greater attention to strengthening their energy‐saving and emissions‐reduction efforts, protecting the environment and promoting the development of new energy. Solar energy is becoming the mainstream of the global power industry because of its significant resources and low cost. This paper provides an overview of the current state‐of‐the‐art of photovoltaic electricity technology (‘photovoltaic’ or PV) in China and addresses its potential for future cost reductions. This paper analyses the relationship between current renewable energy costs and cumulative production, development and demonstration expenditures, and other institutional influences. The theoretical framework of a learning curve offers a complete methodology for examining the underlying capital cost trajectory when developing electricity cost estimates used in energy policy planning models. The cumulative production needed to achieve ‘break‐even’ (the point at which PV is competitive with conventional alternatives) is estimated for a range of learning curve parameter values. The social cost (pollution costs and value‐added tax considered) of PV is calculated, and the question of whether and how the ‘cost cap’ can be bridged is posed, the latter being the difference between what this cumulative production will cost and what it would cost if it could be produced at a currently competitive level. We also estimate how much PV could gain if the external costs (attributable to environmental and health damage) of energy were internalised, such as through an energy tax. We use the simulated results to provide suggestions for relevant PV industrial policymaking.  相似文献   

13.
As a result of the strong growth of renewable energies in the German electricity sector within the last few years, the allocation of renewable costs to the consumer (RES-E apportionment) has been set to 5.277 ct/kWh for 2013 (ÜNB, Pressemitteilung der Übertragungsnetzbetreiber zur veröffentlichten EEG-Umlage 2013, 2012a). This article presents potential developments in the costs of promoting renewable energy and the RES-E apportionment in Germany using three different scenarios. Each of the scenarios considers different trends with respect to further deployment of renewable energies, wholesale prices and electricity demand. Due to the underlying uncertainties surrounding these major parameters, the scenarios show a wide range for the RES-E apportionment. A reduction of the RES-E apportionment can be reached if we consider an increase in wholesale prices. However, the scenarios indicate a further increase in the RES-E apportionment, where the amount heavily depends on the further deployment of renewable energies and the development of wholesale prices. Despite the reduction of feed-in tariffs, a main contributor to an increase in the RES-E apportionment is still the ongoing deployment of photovoltaics (PV). In order to prevent a further cost increase without inhibiting renewable targets, it may be worth focusing on comparably cheaper technologies in the further deployment of renewable energies.  相似文献   

14.
Many consumers currently follow the idea of energy self-sufficiency and try to contribute to meet their energy needs in order to become independent and self-sufficient from the central power supply system. In order to achieve load-oriented energy self-sufficiency the provision of energy must cover the full energy demand at any time. Against this background, in this paper the costs and potentials of a load-oriented energy self-sufficiency of single-family homes are analysed. Thereby it is differentiated between electricity-, heat- and energy self-sufficiency. The modelling is carried out with the simulation environment ?Polysun Designer“ which allows a high temporal dynamic simulation of the annual energy demand and supply.The results show that, within the investigated supply variations, the highest levels of energy self-sufficiency can be achieved by an energy supply system completely based on electricity using a combination of PV; heat pump and battery storage. Depending on the building standard, a maximum of 45 (existing buildings) and 71?% (new buildings) of the building’s energy demand can be covered with renewable energy. The economic evaluation however has shown that under present conditions, none of the investigated supply variants can compete with conventional energy supply (public grid connection + gas condensing boiler).  相似文献   

15.
PV power plants with east-west-orientation have a lower energy production per installed kWp due to their orientation than those facing to south. Thus they need a reduction of costs to compensate the lack of energy production and to have the same cost effectiveness as PV plants with south-orientation. This paper tries to show, how and if PV plants with east-west-orientation can be more profitable than PV plants with south-orientation. Therefore, the energy production was simulated for PV plants with an orientation to east-west and to south with different inclinations in a place with high irradiation (Freiburg) and a place with low irradiation (Hamburg). A calculation of profitability was made for each PV plant including energy production as well as ascertained costs. This are the main outcomes:
  • The profitability of PV plants with east-west-orientation is not better than the profitability of PV plants with south-orientation.
  • The profitability of PV plants with east-west-orientation is better than the one of PV plants with south-orientation when the costs of mounting systems are much lower for east-west mounting-systems than for mounting-systems with south-orientation and the costs of grid-connection and rent are high too.
  • The profitability of PV plants with east-west-orientation is higher in regions with low irradiation.
  •   相似文献   

    16.
    随着风电和光伏发电成本竞争力越来越强,国家财政补贴退坡、平价上网推进力度也逐步加大,在光伏发电建设管理方面开始实行光伏发电补贴竞价政策。油气田企业自备电网可以通过市场化交易,就近消纳分布式光伏发电和风电,条件非常便利,具有降低用电价格的潜力,同时"绿证"和碳减排指标的降本成效显著。油气田开发过程中推广网电钻井和压裂,油藏在开采后期实施二氧化碳驱、减氧空气驱等三次采油措施,开发利用油区地热资源,以及利用枯竭油气藏埋藏二氧化碳,都将新增大量用电需求。油气田企业依托自备电网、油区道路、土地和市场等优势,发展风光发电业务潜力巨大。在油区部署煤炭地下气化业务的综合优势突出,有望在枯竭油气田基础上开创一项"清洁电力+煤炭地下气化+二氧化碳埋藏"绿色产业,实现油、气、煤化石能源与清洁能源融合发展,促进传统油气田企业向清洁能源生产企业的转型发展。  相似文献   

    17.
    基于Web的通信检修票申请批复管理信息系统   总被引:1,自引:0,他引:1       下载免费PDF全文
    针对华北电力调度局的通信检修票管理业务,系统地分析了通信检修票管理的业务流程、功能与架构,并且充分考虑对通信检修票管理信息系统可靠性、安全性和实用性的要求,比照C/S,C/S+B/S和B/S3种软件开发模式特点,提出了一套高效、实用的C/S+B/S模式的通信检修票管理信息系统开发方案,还采用C/S+B/S结构模式成功建立了基于Web方式的通信检修票申请批复管理信息系统。  相似文献   

    18.
    为推进严寒地区建筑节能进程,通过更经济的节能改造策略适应不断提高的建筑节能要求,针对哈尔滨市某9层住宅楼,以提高围护结构保温性能和改设双向通风窗两种策略建立两类节能模型,利用能耗软件模拟分析两类模型较基本模型的节能性和经济性。对比改用双向通风窗前后的能耗变化情况可知:基本模型节能率提高约15%,每年每平方米节约费用1.87元;第一类模型节能率平均提高约13%,每年每平方米平均节约费用1.42元。与提高围护结构保温性能来达到节能效果的方式相比,采用双向通风窗即可在保证空气品质的同时,获得较好的节能效果。研究结果可为严寒地区的居住建筑节能改造提供参考。  相似文献   

    19.
    The model of temporary disconnection of renewable energy in case of high energy injection and low demand is thought to be an effective method for reducing investments in electricity networks. However, plant owners need to be reimbursed for foregone sales. According to the currently discussed draft of the Amendment of the German Incentive Regulation Ordinance, these costs can be rolled over to the consumer on a yearly basis, but are part of the cost benchmark with their base year values. This paper shows that this model sets incentives for optimal investments in electricity networks, but violates the participation constraint: Net operators will be exposed to a severe risk of worsening their position in the cost benchmark. In expectation, they will generate losses and investors have no incentive to invest in electricity networks. This problem can be solved by allowing net operators to roll over costs to customers, while considering average reimbursement fees in the cost benchmark.  相似文献   

    20.
    DQL800/1250.30型堆取料机是一种自动化水平较高的大型装卸设备,因存在许多问题而不能正常工作。通过对其供电方式改进、悬臂皮带跑偏治理、增加中心溜槽电保温、斗轮收缩盘连接方式改进等技改,使堆取料机较好满足了生产要求,并对相应的改进措施进行了详述。  相似文献   

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