共查询到20条相似文献,搜索用时 93 毫秒
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《中国电机工程学报》2017,(14)
循环流化床(circulating fluidized bed,CFB)锅炉机组蓄能与煤粉炉差异较大,独特的燃烧方式形成可观的燃料侧蓄能,为提升CFB机组的快速变负荷能力、促进新能源电力规模化并网提供可能。通过机理分析,建立亚临界及超临界CFB锅炉蓄能理论体系,分析燃料侧及汽水侧蓄能能力、控制调节特性,根据实例量化锅炉蓄能。提出CFB锅炉机组蓄能的利用模式,基于此设计先行能量平衡控制系统,缩短机组响应时间,显著提升变负荷速率,并为大比例掺烧煤泥提供有效控制方法。此外,通过电厂工程运行分别实现了亚临界及超临界CFB机组的快速变负荷运行控制。 相似文献
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《热力发电》2017,(5)
目前,循环流化床(CFB)机组自动发电控制(AGC)一直处于动荡调节过程之中,致使各调节机构动作频繁,这主要是由于对CFB锅炉燃烧系统各调节量随负荷的变化规律(即静态特性)不明所致。因此,根据CFB锅炉的容量、结构、分离器性能、脱硫效率等,通过调节给煤粒度分布、床压降和一二次风比,获得最优物料质量浓度分布,并降低底渣含碳量和飞灰含碳量,然后建立炉内热量平衡、物料平衡和碳量平衡方程,采用牛顿法求解非线性方程组,获得CFB锅炉在不同负荷下燃用不同煤质及其在不同给煤粒度分布下的静态调节特性,确定CFB锅炉优化运行时的燃料量、一次风量、二次风量、石灰石量和排渣量等最佳调节量,将其作为CFB锅炉燃烧调节设定值,可实现CFB锅炉燃烧解耦控制。 相似文献
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彭城电厂热工自动化检测、控制系统由必要的分散控制系统(DCS) 、CRT 屏幕监控,专用的控制装置,少量的常规仪表构成。该系统的特点是采用第4 代直接能量平衡信号DEB400 作为锅炉负荷指令,向汽机和锅炉提供一个公共的需求信号,使它们的运行保持一致;使锅炉的输入能量与汽机需求的能量相匹配;使锅炉热量快速响应功率的变化;实现机前压力的定值调节。该厂的热工自动化检测、控制系统通过了运行考验。 相似文献
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大型循环流化床锅炉深度脱硫探讨 总被引:1,自引:0,他引:1
介绍了世界首套"300 MW循环流化床(CFB)锅炉+石灰石/石膏湿法烟气脱硫(FGD)系统"的设计情况,对CFB锅炉和FGD系统的实际运行参数进行了分析。实践表明:CFB锅炉深度脱硫可达到比传统炉内脱硫更高的脱硫效率,能满足日益严格的环保要求,并且燃料适用性更为广泛,石灰石消耗量更少。同时CFB锅炉深度脱硫(脱硝)可实现高效的不以炉内脱硫和低NOx排放为目的的"高温CFB锅炉",这更有利于充分发挥CFB锅炉燃用劣质、高硫燃料的独特优势,是今后大型CFB锅炉的发展方向。 相似文献
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阐述了协调控制系统的基本策略和控制原因,DEB协调控制系统的原理和特点,介绍了丰城电厂协调控制系统的运行方式及其调试,改进和效果。 相似文献
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《The Electricity Journal》2021,34(7):107003
Carbon capture and storage (CCS) has been an object of social science research for nearly two decades now. However, CCS has moved beyond coal-fired electricity, and its roles in industrial decarbonization and atmospheric carbon dioxide removal are newly valued. Is the earlier social science research on CCS applicable to the current moment, or has the context and the object of inquiry changed? This paper assesses whether existing findings are fit-for-purpose, arguing that there are some useful insights, but they have not been applied well to CCS policy and development. The early period of social science research also faces topical and methodological limitations. The paper identifies four areas for social science research for this decade of broader CCS applications — researching CCS in the context of decarbonization, tradeoffs, and a just transition; shifting the focus from “whether” to “how” questions around deployment, including benefits and environmental justice dimensions; exploring new approaches to public engagement globally; and researching how understandings of CCS evolve within the current social media and information landscape. 相似文献
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《Power Engineer (see also Power Engineering Journal)》2006,20(5):14-17
Capturing the harmful carbon that is produced during generation of electricity and burying it underground is not a new idea but, since its appearance in the UK Energy Review, it has again come into the spotlight. Carbon capture and storage (CCS) offers technological solutions to the production of harmful emissions from power generation. The review accepts as inevitable a long-term future for coal, and, according to the government, this new technology could cut carbon emissions form fossil fuels by between 80-90%, leading to the saving of several million tonnes of carbon by 2020. Basically CCS involves capturing the carbon dioxide (CO2) released by burning fossil fuels and injecting it underground 相似文献
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探讨了莱城电厂 2号机组协调控制系统 (CCS)的控制策略与控制原理 ,介绍了系统的组成及优化 ,CCS调试投入后机组运行稳定、经济安全 相似文献
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燃煤发热量软测量技术及其在超临界机组控制系统中的应用 总被引:1,自引:0,他引:1
采用非线性观测器的方法,通过对"广义热值"观测器的数学分析,探索燃煤发热量的软测量技术。在一台660MW超临界机组以12MW/min的变动速率、分5次将负荷从525MW降至245MW、机前压力从24.2MPa滑变到12MPa的工况下,取得了将有功功率偏差控制在5MW以内的效果,实践证明该超临界机组在协调控制系统中融入热值观测器有很好的鲁棒性,表明其能够快速响应自动发电控制(automatic generation control,AGC)大幅度变负荷的要求。 相似文献
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介绍了嵩屿电厂一期2台300MW机组一次调频控制逻辑和参数设置,对CCS侧和DEH侧2种一次调频方式的优缺点进行了分析,针对2种投入方式的不足,对控制策略进行了优化,通过2种不同投入方式的试验和分析,表明优化后的“CCS+DEH”方式的调节性能较好,既能满足电网一次调频响应速度,又能确保机组运行参数(主汽压)的稳定,是投入一次调频功能的优选方式。 相似文献
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The optimal placement of charging infrastructures owns fundamental importance to the popularization of pure electric vehicles (PEVs). This paper focuses on the optimal configuration of centralized charging stations (CCSs) under the condition of large-scale integration of PEVs into grid. A mathematical model to formulate the optimal CCS placement problem is firstly established. Then the distribution discipline of CCSs in the optimum CCS configuration with minimum total transportation distance (TTD) is shed light on according to the mathematical model, and it in turn helps to identify the candidate CCS locations which turn out to be discrete, finite, fit for numerical calculation and reliable. Finally a further optimization model within the searching space of these candidate CCS locations is proposed to identify the optimum CCS configuration, and solved by a modified binary particle swarm optimization (BPSO) based on Taboo mechanism (TM). The resultant optimization method, named TM-BPSO, can make up the defect of premature convergence of the original BPSO to a certain extent. A large number of numerical examples verify the correctness of the proposed strategy and the applicability of the modified BPSO in this study. 相似文献