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Study on integrated development and hybrid operation mode of nuclear power plant and pumped-storage power station

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Global Energy Interconnection 2019年第4期2卷 336-341页

作者： Haizheng Wang Caide Peng China Renewable Energy Engineering Institute No.2Beixiaojie StreetXicheng DistrictBeijing100120P.R.China

The nuclear power plant is suitable for base-load operation, while the pumped-storage unit mainly gives play to capacity benefit in the electric power system;hence, the integrated development and hybrid operation mode of the two can better meet the needs of the electric power system. This article first presents an analysis of the necessity and superiority of such mode, then explains its meaning and analyzes the working routes. Finally, it proposes the business modes as follows: low price pumping water electricity plus nuclear power in the near term;nuclear power shifted to pumped storage power participating in market competition in the middle term;and, in the long term, nuclear power shifted to pumped storage power as primary and serving as an electric power system when needed.

关键词： Nuclear power plant pumped-storage power station Integrated development Hybrid operation modes

Prospect of new pumped-storage power station

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Global Energy Interconnection 2019年第3期2卷 235-243页

作者： Jingyan Li Chuanbao Yi Sujie Gao State Grid Xinyuan Company LTD.

In this paper, a new type of pumped-storage power station with faster response speed, wider regulation range, and better stability is proposed. The operational flexible of the traditional pumped-storage power station can be improved with variable-speed pumped-storage tech no logy. Combined with chemical en ergy storage, the failure to achieve sec on d-order response speed and the insufficient safety and reliability of pumped-storage power units could be solved. With the better solar en ergy and site resources, the in teg rated performance can be improved by an optical storage system in stalled in future pumped-storage stations. Through the characteristics analysis of the new type of pumped-storage power station, three types of optimal station locations are proposed, namely, the load concentration area, new energy concentration area, and ultrahigh- voltage direct current receiver area. Taking the new pumped-storage power station as an example, the advantages of multi-energy cooperation and joint operation are analyzed. It can be predicted that the frequency and load regulation of the power grid will be more flexible, and the service capacity to the main power grid will be much stronger in the future.

关键词： pumped-storage power station Variable-speed pumped-storage technology Chemical energy storage Solarenergy storage system

pumped-storage Solution towards Energy Efficiency and Sustainability: Portugal Contribution and Real Case Studies

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Journal of Water Resource and Protection 2014年第12期6卷 1099-1111页

作者： Helena M. Ramos Maria P. Amaral Didia I. C. Covas Departmentof Civil Engineering Architectureand Georesources Instituto Superior Tecnico Universidade de Lisboa Lisboa Portugal

This paper aims at presenting different pumped-storage solutions for improving the energy efficiency and economic sustainability of water systems. The assessment of pumped-storage solutions, either using fresh water or sea-water, is seen as a viable option to solve problems of energy production, as well as in the integration of intermittent renewable energies, providing system flexibility due to energy loads’ fluctuation, as long as the storage of energy from intermittent sources. pumped-storage is one of the best and most efficient options in terms of renewable resources as an integrated solution allowing the improvement of the energy system elasticity and the global system efficiency. Two real case studies are presented: a fresh water system installed in a river dams—the Alqueva system, in Portugal—and a sea-water system in an arid region of the Cape Verde Islands in Africa. These cases demonstrate the benefits associated to pumped-storage solutions, depending on the storage volume capacity, operational rules and energy tariffs.

关键词： pumped-storage Hydropower Energy Efficiency Renewable Energy

Reducing Intermittence of Renewable Energy Sources with Seasonal-pumped-storage Plants

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Energy and Power Engineering 2017年第4期9卷 273-292页

作者： Pedro P. B. Machado Dorel S. Ramos Gustavo C. Tenaglia Julian D. Hunt Department of Electric Power and Automation Engineering University of S&atilde o Paulo S&atilde o Paulo Brazil Energy Planning Program Federal Universityof Rio de Janeiro Rio de Janeiro Brazil

This paper presents a computational method to model and evaluate if pumped storage Plants (PSP) have the potential to reduce the intermittency of wind generation from different sites in Brazil and to improve the operation efficiency of hydroelectric plants when operating in cascade. Since the problem to be solved does not have a defined analytic solution, a Stochastic Optimization Algorithm was implemented to reach an optimal solution to the set of equations, inputs and proposed scenarios. A case study was developed based on the Paraná River Basin and the results shows that the model can operate in a variety of different operational patterns, making feasible the evaluation of different hydrological and wind scenarios. Given the Model support, it is easy to assume different PSP storage and generation capacities, allowing the comparison between the efficiency improvement of a conventional pumped-storage and a Season-al-pumped-storage in the same scenario. The study concludes that a PSP can effectively reduce the intermittency of wind and solar sources and contribute to the optimization of the Brazilian electricity sector.

关键词： pumped-storage Hydroelectricity Electricity Supply Modelling Genetic Algorithms Evolutionary Algorithm

Providing Frequency Support of Hydro-pumped storage to Taiwan Power System with Wind Power Integration

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Smart Grid and Renewable Energy 2016年第4期7卷 131-141页

作者： Yuan-Kang Wu G. W. Chang Bo-Yu Hsiao Li-Tso Chang Department of Electrical Engineering National Chung-Cheng University Taiwan

The combination of wind and pumped storage is a useful method to compensate the fluctuation of wind power generation, which would exploit the abundant wind potential and increase wind power penetration. Taiwan Power Company (TPC) develops renewable energy actively in recent years. Moreover, TPC has started planning a high penetration wind power system and building offshore wind farms around the coast of Zhangbin, Yunlin and Penghu. The target of the offshore wind power installed capacity is up to 3 GW by 2025. However, the integration of the large scale of wind power would give huge challenges to the system operator because wind is randomly characterized. In this study, after high penetration wind power is integrated, the impacts of system frequency and the dispatch of conventional units will be discussed. Additionally, the hybrid system combing wind power with pumped-storage will be planning to reduce the effect of system frequency.

关键词： High Penetration Wind Power Large-Scale Offshore Wind Farm pumped-storage Hybrid System

Development of Vibrating Monitoring for Hydro Power Turbines under Operating Condition

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Journal of Mechanics Engineering and Automation 2014年第11期4卷 878-886页

作者： Skvorcov Oleg Department of Mechanical Engineering Institut of the Russian Academy of Sciense Moscow 101990 Russia

Units and components of the powerful power equipment are exposed to the big static and dynamic load. An example of such equipments is turbines hydraulic power plant and, especially, hydroelectric pumped storage power plant. Existing techniques of control of a vibrating condition do not consider： very wide frequency range of vibrating processes, difficult character of such processes in the form of the sum multiharmonic, random and close to shock processes. Such techniques usually do not consider intervals of start-up and stop, and also work on transitive modes when loadings on a construction are maximum. Available techniques of an estimation of admissible level of vibrating influence and tests for vibration durability are not harmonized enough among themselves. Various known interpretations of communication of vibrating characteristics and durability estimations on mechanical pressure at broadband vibrating influence yield ambiguous result. On the basis of the analysis of the published information, we attempt to formulate the requirement to system of vibrating monitoring of the hydraulic turbine and power motor pumps. System should provide data acquisition and the analysis of the data on a vibrating condition taking into account accumulation of vibrating influences and long term of operation on the basis of estimation methods as low-cycle, and high-cycle （gigacycle） fatigue is made.

关键词： Vibrating durability shock random transitive modes water-wheel acceleration velocity displacement pumped-storage