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Cui H.,Sichuan Electric Power Research Institute | Dai W.,South China University of Technology
2011 International Conference on Electrical and Control Engineering, ICECE 2011 - Proceedings

The rise of distributed generation (DG) and the development of smart grid call attention to the research on the interconnection of distributed generation. The research of optimal allocation of distributed generation in smart grid is taken. A multi-objective optimization model is proposed that takes account into economic benefits and environmental benefits. The network loss sensitivity analysis is used to determine the location of distributed generation. The multi-objective planning is transformed into single objective planning by employing the fuzzy optimization theory. Results of case study on actual power system show the correctness and effectiveness of the proposed method. © 2011 IEEE. Source

Wang Z.,Sichuan Electric Power Research Institute | Jiang J.,Chengdu University of Technology
Journal of Nanoscience and Nanotechnology

Self-assembly behavior of the polymer drug loading micelle PEO-PPO-PEO was studied using dissipative particle dynamics (DPD) simulation method with various simulation steps. The distributions of drugs in polymer carriers were also investigated with different drug feed ratios. Polymer carriers distributed on the surface of the spherical micelle, and drugs were almost encapsulated in the inner of the micelle. Our simulation work demonstrates that the DPD simulation is effective to study the drug loaded systems and can give useful guidance on the design and preparation of new drug carriers with tailored properties. Copyright © 2014 American Scientific Publishers. Source

Li Q.,Sichuan Electric Power Research Institute | Zhou M.,University of Electronic Science and Technology of China
Proceedings - 2011 IEEE/ACM International Conference on Green Computing and Communications, GreenCom 2011

The concept of green computing has begun to spread in the past few years, gaining increasing popularity. Besides the widespread sensitivity to ecological issues, such interest also stems from economic needs, since both energy costs and electrical requirements of IT industry around the world show a continuously growing trend. In this paper, we first discuss the connotation of green computing and sketch our view on the next generation of IT systems for green computing. Subsequently, we identify key issues relevant to green computing and evaluate different approaches to these problems. Finally, we point out future directions of research and conclude the paper. © 2011 IEEE. Source

Zhang Y.,University of Sichuan | Yang H.,University of Sichuan | Ye M.,Sichuan Electric Power Research Institute
Dianli Xitong Zidonghua/Automation of Electric Power Systems

Currently the power quality monitoring data have exhibited a massiveness tendency. If the data are stored in the relational database, problems such as large storage space, low query access speed and poor scalability will be caused. By analyzing the data access characteristics and hardware environment of the power quality monitoring system, this paper proposes a data management scheme for massive power quality monitoring data based on the distributed file system. The monitoring data of different power quality indices are stored in the compressed files; the heterogeneous distributed servers of the existing monitoring sub-stations and related systems are used as file servers to store the original monitoring data files, the server of the monitoring master station is used as master server for storing data characteristic value and file indexes, it is also used for unified management of file resources. The scheme takes full advantage of each server's storage space and network bandwidth, and saves the storage space and improves the access speed. It also has high reliability and scalability. For example, when the 180 days' data from 100 monitoring sites are stored, the storage space of this scheme is only 2.28% of the traditional scheme; and when the 180 days' three-phase voltage root mean square (RMS) value data of a certain order harmonic are queried, this scheme's acceleration ratio is about 16.49. The reliability and practicality of this scheme are proved through application in the Sichuan power quality integrated data platform. © 2014 State Grid Electric Power Research Institute Press. Source

Hu J.,Chongqing University | Yan B.,Chongqing University | Zhou S.,Test Institute | Zhang H.,Sichuan Electric Power Research Institute
IEEE Transactions on Power Delivery

The aerodynamic coefficients of each subconductor in an iced quad bundle conductor covered with crescent-shaped and sector-shaped cross-sections were determined by the wind tunnel test. A cable element with torsional degree of freedom used to simulate the iced conductor is obtained in ABAQUS software by releasing the two bending degrees of freedom and setting the material to be incompressible. The aerodynamic loads varying with the angle of attack during moving of the bundle conductor are applied on the cable elements used to discretize the iced subconductors through the user-defined element subroutine UEL in ABAQUS. The numerical method verified by two examples is employed to investigate galloping of iced quad bundle conductors at different wind speed, initial angle of attack, ice thickness, ice shape, and span length, and the results reflect the influences of these parameters on the galloping behavior of the quad bundle conductor, which is important for the development of anti-galloping technology. © 2012 IEEE. Source

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