China Huadian Corporation

Xicheng, China

China Huadian Corporation

Xicheng, China
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Yang Q.,Peking University | Chen G.Q.,Peking University | Zhao Y.H.,China Hua Dian Corporation | Chen B.,Beijing Normal University | And 4 more authors.
Procedia Environmental Sciences | Year: 2011

Wind power is considered as one of the most promising renewable energy sources in China. Presented in this study is a life cycle analysis of energy performance and greenhouse gas emission for a typical wind farm in Guangxi, with different stages of manufacturing, transportation, and installation of mechanical components, operation and maintenance, and disassemble and disposal taken into account. Results show that the nonrenewable energy cost and greenhouse gas emission to generate 1 MJ of electricity for the grid are 0.046 MJ and 0.002 kg CO 2 equivalent, respectively. In consideration of the dominant power generation technology of coal combustion in China, the nonrenewable energy saving brought about by the concerned wind farm is estimated at 1.22E+7GJ during its twenty year operating period, while the reduced greenhouse gas emissions are as much as 1.03E+06 ton CO 2 equivalent. It is believed that this successful example can lend solid support to a future wide use of wind power in China. © 2011 Published by Elsevier Ltd.

Yang Q.,Peking University | Chen G.Q.,Peking University | Zhao Y.H.,China Hua Dian 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.

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.

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.

Zhang D.,China Huadian Corporation | Wang J.,China Huadian Electrical Research Institute | Fan W.,China Huadian Electrical Research Institute | Wang L.,China Huadian Electrical Research Institute
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2012

A midterm maximum peak load regulation model of hydropower stations is proposed from the perspective of coordinative operation of thermal and hydraulic power generation. The exponential penalty function is used to convert the minimax problem into the unconstrained programming problem to be solved directly, and the parallel computing advantage of multi-population genetic algorithm is integrated in the coarse-grained parallel genetic algorithm to increase the calculation efficiency and accuracy. The computative results for 8 hydropower stations in Wujiang river basin show that the proposed model mitigates the effect of system load change on the start-up and shut-down of thermal power plants while ensures the peak load regulation of hydropower stations. The coarse-grained parallel genetic algorithm improves the calculation efficiency significantly.

Qian X.,China Huadian Corporation | Yuan J.,China Three Gorges University | Yuan J.,Shandong University | Gao H.,Shandong University | Gao F.,Shandong University
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2012

MPPT (Maximum Power Point Tracking) is normally applied to photovoltaic system of DC microgrid and traditional method is to directly measure the real-time voltage and current by sensors. Since the bus voltage of DC microgrid is actually stable, the functional relationship between the photovoltaic voltage and the duty cycle of DC-DC converter can be obtained. A method of MPPT is proposed, which takes the duty cycle as the input variable and only measures the photovoltaic current, a number of voltage sensors and associated circuitry being cancelled. It reduces the interference and system cost and improves the system reliability. Simulation with MATLAB and experiment with prototype prove the correctness and validity of the proposed method.

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.

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.

Zha H.,China Electric Power Research Institute | Shi W.H.,China Electric Power Research Institute | Zhao H.B.,China Electric Power Research Institute | Wu X.C.,China Huadian Corporation
Applied Mechanics and Materials | Year: 2014

Wind power heating utilization had been studied in this paper. The wind power heating system basic principle, system architecture, operating mode and key characteristics were investigated. The significant matching capability between wind power output and electric boiler had been analyzed, and the wind power heating utilization will be suitable in regional area for improving the locally wind accommodation. Finally, the dispatching problem and suggestion of actual heating wind farm were put forward. © (2014) Trans Tech Publications, Switzerland.

Chang J.C.,Shandong University | Tao A.P.,China Huadian Corporation
Advanced Materials Research | Year: 2014

Wet electrostatic precipitators (wet ESPs) are good options for effective control of PM2.5 emission. However, the common problems of uniform water film formed on rigid collector limited the applicability of typical wet ESPs, thus could be tend to cause "spark-over" and "back-corona". This research was designed to test the performance of the polypropylene fibrous as collection electrodes for PM2.5 control in wet ESP. Meanwhile, drop spreading feature and volume resistivity measurements of polypropylene fibrous collector were investigated. The results show that drop spreading existed in imbibitions experiments between hydrophobic fabrics contacted with water. The difference of spreading characteristics was accordance to the physical woven properties of fabrics. The relationship between the volume resistivity of polypropylene fibrous and the water addition rate has been investigated. The secondary current by polypropylene collection electrode was 5~20 percent higher than that by FRP. The average number collection efficiencies by polypropylene collector amounted to 89.21% for PM2.5 when the gas residence time was 1.33s at 60kV. The relationship between water addition rate and average number collection efficiency was not more regular than other factors such as gas treatment time or applied voltage. © (2014) Trans Tech Publications, Switzerland.

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