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1.
机组间负荷最优分配是降低水电站总体耗水率、增加发电量的一项有效的非工程技术措施。针对棉花滩水电站机组运行特点,采用双层逐步优化算法,实现了"指定工作机组"、"指定工作台数"等多种模式的负荷最优分配,得到了棉花滩水电站耗水率最小的机组间负荷分配方案。该方法更好地反映了棉花滩水电站运行的实际情况,对类似工程具有一定的借鉴价值。  相似文献   

2.
根据万安水电厂厂内经济运行面临的问题,完善水轮机过机流量实时精确测量,将机组尽可能安排于高效率期间运行,降低单位电能耗水率,以提高水电站经济运行水平。通过水轮机效率试验,获得机组运转特性,绘制机组动力特性曲线,优化机组开停机计划,并确定各机组间最优负荷分配(即最优经济运行方案),完善AGC的经济运行优化功能,获得水力机组及整个水电厂的动力特性等基础数据,建立厂内经济运行的最优数学模型和求解算法,制定厂内经济运行计划,利用水电厂自动发电控制AGC对水电站各机组进行实时控制,实现稳定、高效的厂内经济运行。  相似文献   

3.
针对隔河岩水电站机组自动控制方式下的实时运行负荷分配,从时间和空间两方面建立双目标实时负荷分配模型,并提出水电站不可调控区的判定及区内运行策略。在时间上采用机组优先顺序判定与开停机原则相结合的方法安排机组组合,用动态规划法求解空间目标、同时协调时间目标求得一组优化解,并根据少开停机、少穿越振动区等需要筛选合适的负荷分配方案。经隔河岩水电站模拟运行,节约了用水并减少了机组穿越振动区次数,效果显著。  相似文献   

4.
郁光  舒君侠  逯云桥  唐翔 《人民长江》2022,(S1):142-144
大型水电站在电网中的地位比较重要,其机组启停通常由运行人员根据发电计划手动控制。然而采用手动控制开停机存在:(1)机组穿越振动区时间过长;(2)短时不能满足切机容量或系统调峰的要求;(3)容易出现设值错误,导致全厂AGC退出,影响其他机组的负荷调整等问题。为此,提出了开停机操作的优化方案。使用VisualBasic 6.0作为开发平台,开发了水轮发电机开停机控制及负荷调整优化支持系统。并通过对比使用该系统前后开停机操作时间、出力曲线、振动区运行时间,论证了该系统的应用效果。研究表明:该系统的实际应用效果达到了预期目标,确保了开停机操作节点标准化、负荷调整计算高效化,开停机期间跨越振动区时间最小化。  相似文献   

5.
胡婷  彭刚  王乾峰 《人民长江》2010,41(8):96-99
机组组合是水电站短期发电计划中一个重要的问题,合理的组合运行能带来显著的经济效益。采用进制数编码形式表示机组的运行状态,以给定的负荷为基础,对机组运行进行优化,存储运行状态少,且最优方案不受初始值的影响;采用M atlab语言编写了电站内全局的最优机组组合及机组间负荷的合理分配程序,并给出了计算程序。实例计算结果表明:利用进制数的优化算法在机组组合优化问题上是可行的,也是有效的,该算法的收敛性好且速度快,对多机组电站的经济运行具有较好的实用价值。  相似文献   

6.
本文用解析法合成并列运行机组最优等效流量特性曲线,求取机组最优组合投入线,进行负荷最优分配等。为确定抽水蓄能电站最优运行方式提供了可行的计算方法;用线性插函数法及按时段累计水量反映水头变化情况的方法,较好地解决了抽水蓄能电站变水头自动寻优问题。用本文提出的计算方法所编制的计算程序对建设中的华北某蓄能电站进行了模拟计算,得到了满意的结果。  相似文献   

7.
机组组合问题是编制短期发电计划首先要解决的问题,合理的开停机方案 将带来很大的经济效益,由于问题十分复杂,很难找出理论上的最优解,文中介绍了机组组 合问题的数学模型,分类综述了从60年代起该问题的主要解法,比较了各种方法的优缺点, 并提出了尚待研究的问题。  相似文献   

8.
笔者将双层逐步优化算法用于解决与水电厂经济运行有关的机组间负荷分配及机组最优组合的问题,经棉花滩水电厂的实际运行数据与该算法优化分配方案的计算成果比较,表明该算法可取得较好的经济效益.  相似文献   

9.
提出了一种应用模拟退火法解决水电站机组负荷最优分配的方法。该方法以水电站各机组总的耗水量为目标函数,在满足发电机运行上、下限和功率平衡的约束条件下直接对目标函数进行寻优。它的寻优速度快且易于收敛,是解决负荷分配问题的一种有效手段。  相似文献   

10.
提出了一种应用模拟退火法解决水电站机组负荷最优分配的方法。该方法以水电站各机组总的耗水量为目标函数,在满足发电机运行上下限和功率平衡的约束条件下直接对目标函数进行寻优。它的寻优速度快且易于收敛,是解决负荷分配问题的一种有效手段。  相似文献   

11.
水电站机组优化组合的混合粒子群优化算法   总被引:2,自引:2,他引:0  
机组组合是水电站短期发电计划中一个非常重要的问题,合理的组合运行能带来显著的经济效益,开展对机组优化组合的可行性和有效性研究有重大的现实意义。建立了该问题的数学模型,并提出了混合粒子群算法(Hybrid Particle Swarm Optimization,HPSO)的工程实现方法,采用量子粒子群算法解决机组方案的确立,并采用粒子群算法求解负荷经济分配。设计了粒子的适应度计算方法和速度更新方法,提出了HPSO算法的求解步骤。仿真分析表明:HPSO算法求解机组优化组合问题是可行和有效的,该算法实现简单,具有更快更好的收敛性能。  相似文献   

12.
梯级水电站联合优化调度系统的开发与应用   总被引:1,自引:0,他引:1  
梯级水电站联合优化调度系统是一个基于数据库、Matlab、C语言等软件联合开发的应用系统。该系统是在水流量预测和区域负荷预测的基础上,根据短期调度需求、调峰需求,通过优化算法最终得到各梯级水电站之间的负荷分配、站内机组出力以及机组组合状态。以重庆市某梯级水电站为例,仿真结果表明,该系统不仅能直观地反映机组出力,方便调度员发出调度命令,同时该系统的成功应用提高了梯级水电站的水能利用率、节约了发电成本。  相似文献   

13.
For the high dimensional and complex inner-plant economical operation problem of large hydropower station, an improved ant colony optimization with adaptive ability, inspiring ability and local search ability was proposed. Spatial optimal load distribution model and temporal unit commitment model was combined into an overall temporal and spatial economic operation model, in which an innovative ant colony model of multiple ant colonies, multiple outsets and multiple routes was adopted. Information entropy was applied to adjust the path selection strategy and pheromone updating strategy of ant colonies along with the change of its value during the iteration. Two inspiring factors were applied in the algorithm to guide the ant colonies to search for optimal paths in a more efficient and targeted way. Local search ability was guaranteed by local translation of unit start-stop points of the optimal solution in each iteration. In the optimal load distribution model, optimal distribution table was set in advance using dynamic programming, which only took account of the stable operation regions and avoided the cavitation and vibration areas for the security and stability of units. The proposed method is applied to the Three Gorges Hydroelectric plant. Compared with other methods under different water heads, this method shows optimized result under the premise of both calculation speed and stability.  相似文献   

14.
用动态网络规划法制定水电厂开停机计划   总被引:2,自引:1,他引:1  
制定水电厂开停机计划是厂内经济运行的一个重要方面。文中就具体的应用对象,以整个时段内耗水量最小为准则,使用动态网络规划法制定了水电厂日运行计划,并给出了计算结果;同时,将该算法与常用的动态规划法进行了比较。  相似文献   

15.
Dynamic Programming (DP) is considered as a good technique for optimal reservoir operation due to the sequential decision making and ease in handling non-linear objective functions and constraints. But the application of DP to multireservoir system is not that encouraging due to the problem `curse of dimensionality'. Incremental DP, discrete differential DP, DP with successive approximation, incremental DP with successive approximation are some of the algorithms evolved to tackle this curse of dimensionality for DP. But in all these cases, it is difficult to choose an initial trial trajectory, to get at an optimal solution and there is no control over the number of iterations required for convergence. In this paper, a new algorithm, Folded DP, is proposed, which overcomes these difficulties. Though it is also an iterative process, no initial trial trajectory is required to start with. So, the number of iterations is independent of any initial condition. The developed algorithm is applied to a hypothetical reservoir system, solved by earlier researchers.Operating policy obtained using the present algorithm has compared well with that of the earlier algorithm.  相似文献   

16.
A new multi-colony ant optimization (MCAO) combined with a dynamic economic distribution (DED) technique has been proposed for the economical operation of the inner-plant of a hydropower station. MCAO and DED are applied to solve the unit commitment (UC) sub-problem and the economic load distribution (ELD) sub-problem consolidating the ramp rate constraints for the entire schedule. Moreover, a patching mechanism is developed to converge quickly on the optimal solution in two respects: minimum up/down and spinning reserve. A mechanism mitigates the premature convergence by measuring the uncertainty of pheromone with information entropy. A local research technique enriches the diversity of solution space by selecting the derived solutions from the perturbation mechanism. In comparison with the genetic algorithm, the particle swarm optimization, and the ant colony optimization, the MCAO is significantly robust and provides better solutions to the economical operation problem of hydropower stations. Numerical simulations exhibit the superiority of the DED technique regarding stably and quickly consolidating the ramp rate constraints.  相似文献   

17.
The hydro unit economic load dispatch (ELD) is of great importance in energy conservation and emission reduction. Dynamic programming (DP) and genetic algorithm (GA) are two representative algorithms for solving ELD problems. The goal of this study was to examine the performance of DP and GA while they were applied to ELD. We established numerical experiments to conduct performance comparisons between DP and GA with two given schemes. The schemes included comparing the CPU time of the algorithms when they had the same solution quality, and comparing the solution quality when they had the same CPU time. The numerical experiments were applied to the Three Gorges Reservoir in China, which is equipped with 26 hydro generation units. We found the relation between the performance of algorithms and the number of units through experiments. Results show that GA is adept at searching for optimal solutions in low-dimensional cases. In some cases, such as with a number of units of less than 10, GA's performance is superior to that of a coarse-grid DP. However, GA loses its superiority in high-dimensional cases. DP is powerful in obtaining stable and high-quality solutions. Its performance can be maintained even while searching over a large solution space. Nevertheless, due to its exhaustive enumerating nature, it costs excess time in low-dimensional cases.  相似文献   

18.
针对梯级水电站厂内经济运行调度模型约束条件多、求解复杂的问题,提出了一种基于遗传算法的双层耦联求解算法,该算法兼有机组负荷分配和机组组合双重优化的特点,可同时求得厂内经济运行优化调度模型的全局最优解.研制开发了基于此算法的梯级水电站厂内经济运行优化调度程序软件,并且已应用于某流域梯级水电站厂内经济运行实际调度计算中,取得了较高的工程应用价值.  相似文献   

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