共查询到18条相似文献,搜索用时 156 毫秒
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为达到通过机组增容的方式来提高水能利用程度的目的,结合隔河岩水库常规调度,采用43a径流系列对高坝洲水电站进行径流调节计算,获得了高坝洲水电站各个增容方案模拟运行的水能指标,为高坝洲水电站增容经济计算提供了依据。 相似文献
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动态规划法在水电站厂内经济运行中的应用 总被引:9,自引:1,他引:9
利用动态规划建立了水电站厂内经济运行有功负荷分配数学模型。详细分析了动态规划法应用于水电站厂内经济运行的实施方案。方案同时考虑了机组检修和振动对有功负荷分配的影响。结合刘家峡水电站进行实例计算,结果表明,对机组台数较少的水电站,基于动态规划的水电站厂内经济运行实施方案不仅能够提高经济效益,而且能够保证系统运行的实时性。 相似文献
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目前,水电站厂内负荷准实时优化分配在中小型水电站得到了较好的应用,而在巨型水电站却缺乏深入研究。基于巨型水电站的实际生产运行情况,充分考虑其所担负的电网调峰、调频任务,增加了避免机组负荷大面积转移的约束条件;设计了巨型水电站厂内负荷准实时优化分配模块;采用改进动态规划算法,以水电站耗水量最小为目标,建立了巨型水电站厂内负荷准实时优化分配模型,并将该模型应用于四川省瀑布沟巨〖JP3〗型水电站(3 600 MW)。结果表明,通过厂内负荷准实时优化分配运行,电厂日发电耗水率由2.678 m3/(kW·h)〖JP〗下至降2.599 m3/(kW·h);厂内经济运行效益提高近3%;平均计算耗时0.102 s。该结果为研究巨型水电站厂内负荷优化分配提供了可靠参数,其建模思路也可供类似巨型水电站借鉴和参考。 相似文献
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潮汐电站一直存在资源利用率不高的问题,在电站建设初期当机组选型确定时,制定合理的水库蓄、放水计划,可在不增加投资的前提下获得更多的发电效益。为此,以国内某潮汐电站为例,根据各时刻机组发电流量的不同制定运行方案,基于动态规划法建立了单库单向运行潮汐电站发电量最大化计算模型,并利用龙格库塔算法,结合Matlab软件模拟了各时刻水库水位变化过程,求解了各运行方案的发电量值。计算结果表明,受潮汐水位及机组特性的控制,电站发电量的多少取决于发电流量在各时刻的分配,流量最大运行方案发电量明显大于效率最优运行方案,而发电量最大运行方案流量分配介于效率最优运行和流量最大运行之间。 相似文献
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通过深入分析水电站水能计算迭代过程,总结了水能计算迭代轨迹的单向性规律,并充分运用一维搜索原理,提出了水位单向逼近-区间衰减迭代算法,不但能确保水能迭代计算的绝对收敛性,同时兼顾了收敛速度,实例应用表明,效果良好。 相似文献
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以实际工程为研究对象,采用数值计算方法对某大型水电站并网运行方式和水力干扰过渡过程进行了分析研究,结果表明:相同工况下,并入理想大电网调频运行方式时受扰机组最大出力摆动值大于并入有限电网调频运行方式情况,受扰机组最大出力的摆动值为64.32 MW,超额出力倍数为1.09,定子绕组过电流倍数为1.09,接近规范允许值,对这一控制情况,在类似工程设计和管理运行中应引起高度重视。 相似文献
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《全球能源互联网(英文)》2019,2(1):45-53
In a power system, power generation and load have frequency response characteristics, which randomly fluctuate with changes in operating status. This study investigates a probabilistic power flow method that considers the unit and load uncertainty of the static frequency characteristic. Firstly, a calculation model is established on the basis of the characteristics of the frequency modulation performance of the unit and load. Then a calculation method is developed using the concept of dynamic power flow in order to determine the probability distribution of the active power flow of each line under the occurrence of a fault in the system. In the method, Monte Carlo sampling with the semi-invariant method is applied for analysis and calculation. The IEEE-30-buses system is taken as an example to analyze the impact of different responses of units on the power flow distribution of various branches. The method discussed herein is compared with the Monte Carlo simulation method to verify its effectiveness. 相似文献
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梯级水电站日经济运行研究 总被引:2,自引:3,他引:2
提出一种应用搜索法、动态规划法实现梯级水电站日经济运行的数学模型和算法。它既可用于实时的梯级水电站发电控制,又可用于控制梯级水电站日发电计划。本数学模型和算法理论上严谨、计算时间比较短,能满足实际运行的需求,此模型和算法应用于东江梯级电站、仿真计算的结果比较满意。 相似文献
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This paper analyses the hybrid solar and pump hydroelectric power plant and its hydrological and hydro-energetic characteristics and indicators. The sustainability of the system is based on stable water and energy budget. The key theoretical relationship for solar-hydro system, between electric powers of solar generator, artificial water resources, and storage is set, including relevant formulas and indicators. Artificial rain, flow, and hydro-energy potential, as indicators of the hybrid power plant, have been derived, as well as hydro-energy production characteristics. The developed and presented hydrological and hydro-energetic indicators are information for hybrid energy system analyses and design. The proposed indicators have been applied on two different climate areas, as paradigms of Continental and Mediterranean climate, using a photovoltaic and a solar thermal generator. The obtained results prove the correctness and usefulness of the proposed indicators for hybrid energy system analysis and development. 相似文献
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《International Journal of Hydrogen Energy》2021,46(65):32974-32994
The solid oxide fuel cell (SOFC)/lithium battery hybrid energy structure uses lithium batteries as the energy buffer unit to ensure that the SOFC can operate safely and stably when the load power increases suddenly. For the SOFC/lithium battery hybrid power generation system, a real-time energy management strategy based on power prediction is discussed, and an in-depth summary is made from system construction, power prediction, energy distribution, and power tracking. In the hybrid power generation system, the SOFC system and the lithium battery influence each other. Research the appropriate energy management strategies and realize real-time energy distribution and tracking of hybrid power generation systems in order to improve system performance and economy. This has become a key issue in the current SOFC hybrid power generation system research field. 相似文献
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针对双可再生能源融合发电模式的诸多技术难题,提出了一种在水电站大坝上建设太阳能电站并进行融合发电的创新模式,重点突破了水电与太阳能发电共享型控制技术、光伏逆变谐波抑制技术、无功补偿和共享型直流技术等技术难题。水电和太阳能发电共享型控制技术实现了水电现地控制单元、太阳能现地控制单元、共享型公用现地控制单元的分布式构架;实现了光伏对水电的逆变谐波抑制和无功补偿装置的研发;实现了太阳直流技术补偿水电站直流系统。应用实践表明,太阳能与水能融合发电模式可节约投资、增加无功补偿效益、减少国土资源的占用,是双可再生能源融合发电的创新性应用,具有很好的推广价值。 相似文献