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Short-term power generation scheduling rules for cascade hydropower stations based on hybrid algorithm 被引量:2
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作者 Wei XIE Chang-ming JI +1 位作者 Zi-jun YANG Xiao-xing ZHANG 《Water Science and Engineering》 EI CAS 2012年第1期46-58,共13页
Power generation dispatching is a large complex system problem with multi-dimensional and nonlinear characteristics. A mathematical model was established based on the principle of reservoir operation. A large quantity... Power generation dispatching is a large complex system problem with multi-dimensional and nonlinear characteristics. A mathematical model was established based on the principle of reservoir operation. A large quantity of optimal scheduling processes were obtained by calculating the daily runoff process within three typical years, and a large number of simulated daily runoff processes were obtained using the progressive optimality algorithm (POA) in combination with the genetic algorithm (GA). After analyzing the optimal scheduling processes, the corresponding scheduling rules were determined, and the practical formulas were obtained. These rules can make full use of the rolling runoff forecast and carry out the rolling scheduling. Compared with the optimized results, the maximum relative difference of the annual power generation obtained by the scheduling rules is no more than 1%. The effectiveness and practical applicability of the scheduling rules are demonstrated by a case study. This study provides a new perspective for formulating the rules of power generation dispatching. 展开更多
关键词 scheduling rule short-time power generation dispatching hybrid algorithm cascade hydropower station
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Decision-making model for risk management of cascade hydropower stations
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作者 Pan, Bangchuan Chi, Hong +1 位作者 Xu, Jianguo Qi, Mingliang 《Journal of Southeast University(English Edition)》 EI CAS 2008年第S1期22-26,共5页
In a medium-term electricity market,in order to reduce the risks of price and inflow uncertainties, the cascade hydropower stations may use the options contract with electricity supply companies. A profit-based model ... In a medium-term electricity market,in order to reduce the risks of price and inflow uncertainties, the cascade hydropower stations may use the options contract with electricity supply companies. A profit-based model for risk management of cascade hydropower stations in the medium-term electricity market is presented. The objective function is profit maximization of cascade hydropower stations. In order to avoid the risks of price and inflow uncertainties, two different risk-aversion constraints: a minimum profit constraint and a minimum conditional value-at-risk, are introduced in the model. In addition, the model takes into account technology constraints of the generating units, which includes reservoir flow balance, reservoir capacity limits, water discharge constraints, etc. The model is formulated as a mixed integer nonlinear programming problem. Because the search space of the solution is very large, a genetic algorithm is used to deal with the problem. 展开更多
关键词 cascade hydropower station mixed integer nonlinear programming risk management medium-term electricity market
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TianshengqiaoⅠcascade and Ⅱ cascade hydropower stations completely built up
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《Electricity》 2001年第1期50-50,共1页
关键词 cascade hydropower stations completely built up Tianshengqiao cascade and
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Practice of Centralized Control over Cascade Hydropower Stations
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作者 Jin Zehua General Manager, Guizhou Wujiang Hydropower Development Ltd. 《Electricity》 2010年第1期44-47,共4页
Isolated operation of hydropower stations on Wujinag River was seen disadvantages of low rate of water utilization and much loss of electricity caused by abandoned water during low load periods. To tackle the problem,... Isolated operation of hydropower stations on Wujinag River was seen disadvantages of low rate of water utilization and much loss of electricity caused by abandoned water during low load periods. To tackle the problem, centralized control over cascade hydropower stations is practiced with a considerable economic benef it gained. 展开更多
关键词 RATE Practice of Centralized Control over Cascade hydropower stations OVER
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Effects of Mountain Rivers Cascade Hydropower Stations on Water Ecosystems
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作者 Mengtian Sun Kai Huang +2 位作者 Jinhua Shao Weixiong Wu Xinyue Liang 《Research in Ecology》 2022年第1期17-26,共10页
China is rich in hydropower resources,and mountain rivers have abundant water resources and huge development potential,which have a profound impact on the pattern of water resources allocation in China.As the main way... China is rich in hydropower resources,and mountain rivers have abundant water resources and huge development potential,which have a profound impact on the pattern of water resources allocation in China.As the main way of water resources and hydropower development,the construction of cascade hydropower stations,while meeting the requirements of water resources utilization for social development,has also brought adverse effects on river ecosystems.Therefore,the impact of the construction of cascade hydropower stations on mountainous river ecosystems,where the minimum ecological flow of rivers must be ensured and reviewed.In addition,this paper proposed the deficiencies and outlooks for cascade hydropower stations based on previous research results. 展开更多
关键词 Mountain rivers Cascade hydropower stations Development and operations Ecological flow Water ecosystems Effects and countermeasures
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Establishment and evaluation of operation function model for cascade hydropower station 被引量:2
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作者 Chang-ming JI Ting ZHOU Hai-tao HUANO 《Water Science and Engineering》 EI CAS 2010年第4期443-453,共11页
Toward solving the actual operation problems of cascade hydropower stations under hydrologic uncertainty, this paper presents the process of extraction of statistical characteristics from long-term optimal cascade ope... Toward solving the actual operation problems of cascade hydropower stations under hydrologic uncertainty, this paper presents the process of extraction of statistical characteristics from long-term optimal cascade operation, and proposes a monthly operation function algorithm for the actual operation of cascade hydropower stations through the identification, processing, and screening of available information during long-term optimal operation. Applying the operation function to the cascade hydropower stations on the Jinshajiang-Yangtze River system, the modeled long-term electric generation is shown to have high precision and provide benefits. Through comparison with optimal operation, the simulation results show that the operation function proposed retains the characteristics of optimal operation. Also, the inadequacies and attribution of the algorithm are discussed based on case study, providing decision support and reference information for research on large-scale cascade operation work. 展开更多
关键词 actual operation independent variable multiple stepwise regression attribution analysis cascade hydropower station
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