共查询到16条相似文献,搜索用时 78 毫秒
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蒸汽动力系统(SPS)是过程工业生产系统的重要供能系统,为生产过程提供电能、机械能、热能及工艺蒸汽.系统综合优化是实现SPS高效、经济、环保长周期运行的关键技术.系统稳态运行过程中不可避免的面临变化的工艺运行特性、市场供需及环境等不确定性因素,严重影响综合优化方案实施的高效性及鲁棒性.不确定条件下SPS的综合优化方法已经成为系统集成优化的研究热点.本文首先综述了SPS系统中不确定参数的量化及估计方法,包括模糊规划、随机规划及鲁棒优化方法的研究进展,并分析了近十年不确定条件下SPS综合优化问题的研究现状;并对近十年来,SPS的重要系统能源结构综合优化,考虑经济、效率及环境等指标的单目标,及同时考虑多个指标的多目标综合优化研究进行了总结和分析.分析结果表明,集成新能源系统的、多目标、鲁棒SPS的最优结构和运行方案的开发是今后研究的重要方向. 相似文献
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为解决多参数耦合情况下蒸汽动力系统整体运行稳定性评估的问题,在基于时间序列分析的单参数运行稳定性评估的基础上,提出了一种蒸汽动力系统整体运行稳定性评估方法。该方法通过分析蒸汽动力系统运行参数的相关性和作用机制,选取相关状态参数建立系统的整体运行稳定性评估指标体系;然后通过引入连接函数(Copula函数)建立稳定性指标计算模型,实现系统在多参数耦合情况下的联合失稳概率和整体运行稳定性指数计算。经实例验证,该方法能够依据监测参数历史数据,相对精确地预测出系统未来一段时间的运行状态,预测精度达到秒级。 相似文献
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蒸汽动力系统是石化企业的重要组成部分,也是耗能大户,其任务是将一次能源转换成二次能源,为生产过程提供所需动力、电力、热能和蒸汽等公用工程。如何实施全厂蒸汽动力系统的优化,是石化企业节能降耗的重要途径。20世纪80年代至今,以优化计算方法为支撑的蒸汽动力系统的优化研究比较活跃,夹点分析法、顶层分析法、数学规划法以及R-曲线法相继得到广泛应用;与此同时,国内外相继开发出一系列商品化软件。中国石化(SINOPEC)自2007年引进公用工程设计与调度优化软件Site-Int,已在14家下属企业进行了推广应用,获得了良好的节能效果和经济效益。实践表明,蒸汽动力系统优化技术已经成为中国石化生产企业不可缺少的技术支持与辅助工具,可以帮助企业识别蒸汽动力系统存在的操作瓶颈问题,找到节能改造的机会,从而实现节能减排、降本增效的目的。 相似文献
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A multiperiod mixed-integer linear programming (MILP) model for the operational planning of steam power system (SPS) is presented. The objective of the model is to simultaneously minimize the total economic cost and environmental impact. The environmental impact in the present approach is expressed by monetary cost of pollutant abatement technology and environmental charge triggered by pollutant emissions of steam power plants (SPPs) that fire fossil fuels. In addition, simplified operation models of multi-fuel boilers and complex turbines are formulated. Pollutant emission models involving fuel type, fuel composition, burning fashion, and pollutant abatement technology are also developed. A typical industrial SPS consists of multiple interconnected SPPs in a petrochemical complex is used to demonstrate the performance of the proposed method and the formulated model. The optimal operational planning schemes are obtained based on different environmental charge standards reported in literature. Compared to an economic optimization scheme, significant total cost savings and pollutant reductions are achieved simultaneously. In addition, the optimal economic and environmental scheme is quite sensitive to the environmental charge standard. 相似文献
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In this paper, a multi-stage stochastic optimization (MSO) method is proposed for determining the medium to long term power generation mix under uncertain energy demand, fuel prices (coal, natural gas and oil) and, capital cost of renewable energy technologies. The uncertainty of future demand and capital cost reduction is modelled by means of a scenario tree configuration, whereas the uncertainty of fuel prices is approached through Monte Carlo simulation. Global environmental concerns have rendered essential not only the satisfaction of the energy demand at the least cost but also the mitigation of the environmental impact of the power generation system. As such, renewable energy penetration, CO2,eq mitigation targets, and fuel diversity are imposed through a set of constraints to align the power generation mix in accordance to the sustainability targets. The model is, then, applied to the Indonesian power generation system context and results are derived for three cases: Least Cost option, Policy Compliance option and Green Energy Policy option. The resulting optimum power generation mixes, discounted total cost, carbon emissions and renewable share are discussed for the planning horizon between 2016 and 2030. 相似文献
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综合能源系统是能源结构转型与发展过程中的关键环节,也是高比例可再生能源并网型能源互联网的具体实现。由于多种能源耦合以及可再生能源不确定性等因素的影响,综合能源系统规划设计对经济性和环保性提出了更高要求。文章提出了考虑风电不确定性的综合能源系统能源供给单元容量协调规划决策方法。首先结合风电不确定性集合的区间数量化方法,建立了基于直觉模糊集的风电不确定性量化模型;然后通过对电力系统、热力系统、天然气系统的能源供给单元经济成本和环境成本进行分析,提出考虑风电不确定性的综合能源系统能源供给单元容量协调规划决策模型及求解方法,最大限度降低综合能源系统经济成本和环境成本,提高风电的并网容量;最后通过算例仿真验证了所提规划方法的正确性和有效性。 相似文献
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针对多源负荷的波动性和不确定性影响电力系统安稳运行,导致系统运行可靠性降低等问题,文章提出了一种考虑多源负荷不确定性的电力系统安稳风险优化方法;建立了考虑多源负荷不确定性的电力系统元件停运概率模型;提出了考虑多源负荷不确定性的电力系统安稳风险评估方法、安稳风险评估指标及其评估流程,对多源负荷波动下的电力系统安稳风险进行了评估。以系统运行过程安稳风险最低、负荷削减总量最小和系统经济损失后果最小为目标,建立电力系统安全稳定风险优化模型,对电力系统安稳风险进行优化。文章以IEEE-39节点算例进行仿真,验证了所建立模型的有效性。 相似文献
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