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抽水蓄能具有调峰、调频、调相、储能、系统备用和黑启动"六大功能",在保障大电网安全、促进新能源消纳、构建新型电力系统、助力乡村振兴和经济社会发展中发挥着重要作用.
随着国家对固体废弃物堆场安全、水土保持、生态环境等问题日益重视,弃渣场已成为抽水蓄能电站建设管理和运营的重要组成部分之一.抽水蓄能电站多临近电力负荷中心,自... 相似文献
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镇安抽水蓄能电站弃渣坝体型复杂、弃渣量大且坝坡上建有永久上坝道路,为了保证弃渣坝的安全稳定以及上坝道路的交通安全,该文结合弃渣坝体型结构、施工计划与弃渣种类,采用有限元分析法进行弃渣坝的分区设计。通过对弃渣坝进行合理分区,将坝体分为上游上坝坡、上游下坝坡、路基、下游坝坡4个区域,经过变形与稳定性分析得出:采用覆盖层渣料填筑于上游上坝坡,以及使用模量较高的风化层渣料填筑其余区域的分区方案,则弃渣坝稳定性较高、永久道路的变形量较小,从而使弃渣坝整体安全性与可靠性较高,说明该方案具有较大合理性。 相似文献
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我国抽水蓄能电站与风电场联合调峰交易模式设计 总被引:1,自引:0,他引:1
风电的反调峰特性要求我国加强调峰电源建设并优化其运营,抽水蓄能是经济有效的调峰调频工具之一,优化现有抽水蓄能电站运营模式是促进短期内风电大规模并网的有效手段。综合考虑我国抽水蓄能电站与风电场联合调峰交易模式发展与管理现状,从交易管理机制、运行平衡机制、安全机制、结算机制与市场监管机制5方面,系统研究了抽水蓄能电站与风电场联合调峰交易模式设计问题,并构建了抽水蓄能电站与风电场联合调峰交易保障机制,为我国抽水蓄能电站与风电场联合调峰交易提供了借鉴和参考。 相似文献
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根据镇安抽水蓄能电站弃渣坝地质条件和现场实际工况,通过对不同干密度土料开展土工试验,分析了坝体材料各力学参数特性。试验结果表明:随着围压增大,该坝弃渣料的峰值应力相应增大;在低应力情况下,弃渣料的体积缩小,在围压较高时,体积变化增大;弃渣料先出现剪缩,随后变为剪胀,剪胀随着侧压力的增大出现缩小现象,应力-应变关系曲线呈软化型,最终转变为剪缩型;保持围压条件不变,材料的峰值应力在干密度逐渐增大的情况下出现略微增大,但最大体变随着干密度增大出现较明显的减小情况;保持相同围压状态,邓肯-张模型参数对干密度的敏感性大小依次为Kb、k、m、c、Δφ、Rf、φ0、n。相关研究可为以后抽水蓄能电站的弃渣坝设计和后期防护奠定理论基础。 相似文献
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王尊相 《电网与水力发电进展》1994,(4)
根据四川电力系统的现状和发展,研究阐述了抽水蓄能电站对电网巨大的机动灵活性,从而带来电网最佳经济效益和社会效益,是解决系统长期存在的调峰调频,缺少备用容量、弃水调峰损失等问题的好办法,是四川电力系统安全经济运行的迫切需要。 相似文献
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《全球能源互联网(英文)》2019,2(3):235-243
In this paper, a new type of pumped-storage power station with faster response speed, wider regulation range, and better stability is proposed. The operational flexible of the traditional pumped-storage power station can be improved with variable-speed pumped-storage technology. Combined with chemical energy storage, the failure to achieve second-order response speed and the insufficient safety and reliability of pumped-storage power units could be solved. With the better solar energy and site resources, the integrated performance can be improved by an optical storage system installed in future pumped-storage stations. Through the characteristics analysis of the new type of pumped-storage power station, three types of optimal station locations are proposed, namely, the load concentration area, new energy concentration area, and ultra- high-voltage direct current receiver area. Taking the new pumped-storage power station as an example, the advantages of multi-energy cooperation and joint operation are analyzed. It can be predicted that the frequency and load regulation of the power grid will be more flexible, and the service capacity to the main power grid will be much stronger in the future. 相似文献
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为了适应电网发展的需求,具备一定地形地质条件的常规水电站可考虑通过增装蓄能机组扩建成混合式抽水蓄能电站。针对共用引水系统的常规机组和蓄能机组实际运行特点,基于特征线法和瞬变流理论,建立了水力过渡过程计算模型,并结合工程实例模拟了混合式抽水蓄能电站可能发生的多种过渡过程工况,确定了合理的蓄能机组的关闭规律,复核了已建调压室的稳定性。结果表明,通过对新增蓄能机组导叶启闭规律的独立调控,一定程度上可维持混合式抽水蓄能电站输水发电系统的安全稳定,避免增设调节保证设施;蓄能机组导叶关闭时间延长,在降低自身蜗壳末端最大压力的同时,可抑制常规机组甩负荷后的蜗壳末端压力及最大转速上升;对于既有调保措施威胁最大的相继增负荷工况,引用流量较大的常规机组优先增负荷比引用流量较小的蓄能机组优先增负荷引起的调压室最低涌浪值更高,更有利于调压室的稳定运行。 相似文献
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Increasing concerns about the environmental impact and unreasonable consumption of natural resources for energy production and conversion processes have led to analyze thoroughly the current state of energy systems development. Hence, what is required is not only producing with the maximum cost effectiveness, but also minimizing the emission of pollutants and waste disposals, too. Unavoidably, in any productive process, the achievement of functional products is inseparable from the generation of residues and waste disposals. Thermoeconomic cost accounting methods have placed emphasis on the production process traditionally, without bearing in mind the cost of residues. To allocate the cost of products from poly-generation systems appropriately, it is required to know where the residues have been generated as well as their abatement costs. Therefore, in the same way as there is a process of cost formation of the functional products, there also exists a cost formation process of the residues. In this paper, the mathematical basis for the cost assessment and the formation process of residues are presented. 相似文献
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CHEN Zong-qi 《电网与水力发电进展》2007,(7)
抽水蓄能电站具有填谷调峰的优良特性。详述了调频、调相、负荷调整、旋转备用、提高电网可靠性的辅助功能以及世界和中国抽水蓄能电站的发展情况。提出我国在火电比重大和建设核电站的电网及"西电动送"受端电网,优先发展抽水蓄能电站,在水电比重较大,但调节性能差的电网,适当配置抽水蓄能电站。抽水蓄能电站一般应修建在负荷中心附近,且有天然湖泊或已建水库处。 相似文献
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中国现行抽水蓄能电站的运营模式要求必须要对其辅助服务功能进行评价。分析了现行抽水蓄能电站辅助服务功能评价现状,建立了评价抽水蓄能电站功能作用的指标体系,并提出辅助服务的贡献率指标,量化了抽水蓄能电站在电网中的辅助服务作用,建立了抽水蓄能电站辅助服务的模糊综合评价方法。 相似文献
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Pumped storage is generally viewed as the most promising technology to increase renewable energy source (RES) penetration levels in power systems and particularly in small autonomous island grids. Combined wind and pumped-storage “virtual power plants”, called hybrid power stations (HPS), constitute a realistic and feasible option to achieve high penetrations, provided that their components are properly sized. In this paper, the optimum sizing is investigated for a pumped storage HPS operating in an island system. The analysis addresses the sizing of the main HPS components (hydro turbines, pumps, wind farm, reservoirs), adopting either the investor’s perspective, where the objective is to maximize the return on the HPS investment, or a system perspective, where the optimization target is the maximization of RES penetration, along with maintaining the lowest possible generation cost in the system. Genetic Algorithms (GAs) are applied for the optimization and a real isolated island power system is used as a study case. The adopted operating policy and pricing principles, which critically affect the optimal sizing of an HPS project, are based on the existing regulatory framework for storage stations in Greek islands. 相似文献