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Deng J.,China Huadian Corporation
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2016

The feasibility of energy internet development is analyzed by resolving the concept of energy internet and it is put forward that, two energy internet modes, i.e. energy internet based on mass data & cloud computing and energy internet based on distributed energy sources, will become new innovation and new business form, which may solve the problems of energy source and environment. The large-scale energy internet based on the mass data & cloud computing is the far-reaching target of future energy system development, which needs an implementation process, while the micro-energy internet based on the distributed energy sources more accords with the practices of present electric power system development, which has a certain practical basis in China and will become the emphasis of present energy system development. © 2016, Electric Power Automation Equipment Press. All right reserved. Source


Jing Y.,China Water Resources Pearl River Planning Surveying and Designing Co. | Hu L.,China Water Resources Pearl River Planning Surveying and Designing Co. | Yue J.,China Huadian Corporation
Advanced Materials Research | Year: 2012

Core of the topological optimization site selection of offshore wind farm is Delphi method. The paper divides the investigated experts into industry experts and professional experts, which respectively score the weighting coefficient and its value of the influence factors of offshore wind farm. The separate marking scheme can well develop the ability of experts, avoid the specialty bias and thereby improve the assessment accuracy. Another modification is to apply the accumulative vote method in the first stage of topological optimization site selection instead of designers' own judgments, which gives a good solution to classify the disputed factors, and avoids fault or deviation due to the knowledge deficiency of designers. In addition, the data analysis results should be reassessed by the industry experts. And in company with the reassessment opinion the data analysis results are the basis for designers to determine the best sea area for offshore wind farm construction, which gives an extra guarantee for the scientific site selection. © (2012) Trans Tech Publications, Switzerland. Source


Yang H.,North China Electrical Power University | Yuan J.,North China Electrical Power University | Wu L.,China Huadian Corporation
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2014

Peak load regulation is one of the main problems that are holding back China's power grid being connected with large-scale wind farms. The research of regulation capacity limit of conventional generating units is a prerequisite to solve the problem. At present, all of researches are not suitable for the future of wind power technology development because these don't consider the impact of wind power forecasting. Numerical simulation method is too hard to practical. This paper gives a static optimization method to calculate limit of regulation capacity. This method is not only able to obtain satisfactory results, and can also be used to improve the usefulness of the simulation method. Examples study to show the correctness of the proposed model and summarize some interesting conclusions. Source


Yang Q.,Peking University | Chen G.Q.,Peking University | Zhao Y.H.,China Huadian Corporation | Chen B.,Beijing Normal University | And 2 more authors.
Procedia Environmental Sciences | Year: 2011

It is commonly assumed that the application of solar power system can save energy and relief global climate change. Presented in this study is the account of energy performance and greenhouse gas emissions of a planned solar tower power plant in China based on the life cycle analysis method. The conservative estimation of energy cost for the concerned plant is 1.21 times of the electricity output, which is a relatively decent performance amongst power generation technologies. In order to analyze the greenhouse gas performance, a comparison is carried out between the solar tower power plant and conventional coal-fired power plant in China. Results show the application of this solar system obtains a net greenhouse gas emission reduction of 0.31E+06 ton CO 2 equivalent, during its operating period of twenty years. It is believed that this successful example can lend solid support to a future wide use of solar power in China. © 2011 Published by Elsevier Ltd. Source


Liu D.,Harbin Institute of Technology | Yang J.-G.,Harbin Institute of Technology | Zhang Z.-Y.,Harbin Institute of Technology | Ju X.-L.,Harbin Institute of Technology | Zhang D.-X.,China Huadian Corporation
Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering | Year: 2011

Taking the direct air-cooled condenser (DACC) of a 1000 MW unit as an object of study, physical and mathematical models have been built so as to study the influence of ambient crosswind on the DACC and the improving mechanism of horizontal baffles on the inlet flow field, through analysis based on computational fluid dynamics. Results show that the installed horizontal baffle makes the negative pressure zone at fan inlet of cell 1 move forward on the side facing the crosswind, which therefore effectively weakens the impact of ambient crosswind and raise the mass flow rate of air intake. For the DACC studied, the optimal length of the horizontal baffle is recommended as 15 m. Source

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