Time filter

Source Type

Tengfei Q.,China Electric Power Research Institute | Bangwen S.,China Electric Power Research Institute | Xiaolong W.,Huanghe Hydropower Development Co. | Hui L.,Nanjing Southeast University
Proceedings - 2015 6th International Conference on Intelligent Systems Design and Engineering Applications, ISDEA 2015 | Year: 2015

In recent years, photovoltaic (PV) power generation is developing rapidly on account of its environment friendliness. However, the PV devices between different manufacturers could hardly interoperate because of different model and protocols they applied. This paper built the information model for PV power generation based on IEC61850, which is more normative and convenient for PV plant configuring. The method abstract functions of PV devices to Logic Nodes (LN), and assembling related LNs into Intelligent Electronic Device (IED). This object-oriented model is strong in commonality and practicability, and is beneficial for devices interoperating. The model in this paper is suitable, and has been applied in practical PV project in Qinghai province, China. © 2015 IEEE. Source

Cui W.J.,CAS Zhengzhou Research Institute | Li L.Q.,CAS Zhengzhou Research Institute | Zhang W.,Huanghe Hydropower Development Co.
Applied Mechanics and Materials | Year: 2014

Calculation of seepage stability is important method in selection and justification of reinforcing dike seepage control measures. In the reinforcement design of the Qinhe river dike downstream, the finite element method of AutoBank is used to calculate the seepage stability of the dike reinforced before and after, and an economic and reasonable reinforcement scheme is selected then. © (2014) Trans Tech Publications, Switzerland. Source

Hong D.,Xian University of Technology | Hong D.,Huanghe Hydropower Development Co. | Niu Z.-M.,Xian University of Technology | Nan J.-H.,Xian University of Technology | And 2 more authors.
Shuidonglixue Yanjiu yu Jinzhan/Chinese Journal of Hydrodynamics Ser. A | Year: 2010

In this paper, the results of the inversion model test are compared with that of the prototype observation of Gongboxia horizontal swirl discharge tunnel. Based on it, the characteristics of fluctuating pressure of this new type energy dissipater in the process of the gates' open-and-close were analyzed. The research results show that in both the prototype and the model, the pressure change with time is approximately consistent in the shaft upper ring-form aerators, in the spiral starter and horizontal swirl tunnel, and it accords with the gravity similarity principle. At the same time, due to the model scale effect, their cavity lengths of the ring-form aerators are different and the differences of pressure are also larger. Pressure changes on the wall of the spiral starter may be classified into four steps in the process of the gates' open. The dominant frequencies corresponding measuring points in the prototype and the model of horizontal swirl tunnel all belong to low frequencies, are far less than the inherent frequency of the building. Source

Cao Y.,Hubei University | Guo Q.,Hubei University | Shu Z.,Hubei University | Zhuang Y.,Hubei University | And 6 more authors.
Applied Clay Science | Year: 2016

Unlike the other family members of anion clay, iowaite, a Mg-Fe based layered double hydroxide, was seldom used in removing undesirable constituents from natural or contaminated waters. In this study, iowaite as well as its calcination product were employed to treat arsenic-spiked solutions, taking into account that anion clays exhibited great capacity to incorporate anionic pollutants as a result of their relatively weak interlayer bonding, and Fe-bearing minerals had high affinity to both arsenate and arsenite. The thermal decomposition process and structural memory effect of synthetic iowaite were investigated over a wide temperature range of 300-1000. °C for the first time, based on which the calcination product obtained at 450. °C was finally selected to be used in solution dearsenication experiments. The experimental results showed that the content of Fe in pristine iowaite significantly affected its arsenite sorption behavior, whereas the calcination process weakened the effect of Fe content on arsenite uptake. The calcined iowaite was generally characterized with higher arsenic uptake capacity as compared to some other sorbents commonly used for arsenic removal from solution in recent years as well as the pristine iowaite synthesized in this study. A contrast experiment suggested that magnoferrite in the calcination products of iowaite made no contribution to the enhanced arsenic uptake capacity of calcined iowaite. Hence, calcined iowaite performed better in arsenic removal because of the high availability of arsenic oxyanions to the interlayer regions during its structural restoration. The arsenic oxyanions did not need to diffuse into the interlayers to replace the original chloride ions as they did for pristine iowaite. © 2016 Elsevier B.V. Source

Wang J.,University of Sichuan | Huang W.,University of Sichuan | Ma G.,University of Sichuan | Bai Y.,Huanghe Hydropower Development Co. | And 2 more authors.
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2015

Based on the relationship between annual power generation and year-end energy storage, a multi-objective prediction model for the optimal year-end water level of carryover storage reservoir is developed, which gives a full consideration to maximizing the hydro energy and least output of the hydro plant at such a reservoir. The model was validated with the case of Longyangxia reservoir on the upper Yellow, and the essence in obtaining its optimal year-end level was revealed through analysis of the impacts of water inflow and year-start level on this optimal level. The operation results simulated by the model are further compared with the prototype operation case of this reservoir from 1990 to 2012. This shows that since 2006 it has run at a higher level than before 2006, which improves its own benefits and indicates that the multi-objective model is reasonable and feasible. ©, 2015 All right reserved. Source

Discover hidden collaborations