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Hu J.,Chongqing University | Yan B.,Chongqing University | Zhou S.,Test Institute | Zhang H.,Sichuan Electric Power Research Institute
IEEE Transactions on Power Delivery | Year: 2012

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.

Sichuan Electric Power Research Institute and State Grid Corporation of China | Date: 2013-01-02

An intelligent electric meter centralized recharging terminal comprises an IC card interface circuit, an ESAM module circuit and two groups of RS485 communication module interface circuits. The IC card interface circuit is connected with a CPU via ICREST and ICIO data pins, the ESAM module circuit is connected with the CPU via data and reset pins SAMIO and SAMRST directly. The two groups of RS485 communication module interface circuits are respectively connected with the CPU, so as to realize communication with an intelligent electric meter and a collector, and monitor communication data between the collector and the electric meter in real time and forward the data. The IC card interface circuit completes communication with user card interfaces. The ESAM module circuit completes data exchange and reset operations and various safety certification operations such as encryption, decryption and operation. A program module for the intelligent electric meter centralized recharging terminal ensures the normal communications of the system.

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 | Year: 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.

Li Q.,Sichuan Electric Power Research Institute | Zhou M.,University of Electronic Science and Technology of China
Journal of Computers | Year: 2011

Since its emergence, smart grid has been given increasingly widespread attentions. Basically, smart grid combines a various modern technologies like network communication, information processing and distributed control to provide a more secure, reliable and intelligent grid, thus meeting the requirements of future social and economic development. As a new paradigm in the power grid, smart grid undoubtedly represents the mainstream trend of future electric industry. As a result, it also brings some new technical challenges to researchers and engineering practioners. To support researchers and engineering practioners constructing a modern and intelligent grid, research in the field of smart grid has proliferated. In this paper, we look deeper into some key issues of smart grid, such as distributed cooperation and control, data and application integration, and knowledgebased comprehensive decision. Still, we give some solutions to resolve these challenges. In addition, we also introduce the concept of smart grid and define its key characteristics. Finally, we outline future directions of research and conclude the paper. © 2011 ACADEMY PUBLISHER.

Wang Z.,Sichuan Electric Power Research Institute | Jiang J.,Chengdu University of Technology
Journal of Nanoscience and Nanotechnology | Year: 2014

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.

Zhang A.,Southwest Petroleum University | Li H.,Southwest Petroleum University | Liu F.,Sichuan Electric Power Research Institute | Yang H.,University of Sichuan
International Journal of Electrical Power and Energy Systems | Year: 2012

Multi area power systems work most often with a poor inter-regional coordination about reactive power concerns. Poor coordinated operation may not achieve significant improvements in the quality and efficiency of power system operation, and may even increase the risk of blackout for multi-TSO (Transmission System Operators) power systems. This paper focused on the voltage/reactive power coordinated control. Voltage/reactive power interactions between interconnected power networks were derived from the augmented active and reactive power decoupled network equations. According to distribution computing concept, a novel voltage/reactive power control model was presented in this paper, which could optimize the active power losses of both local network and its interconnected areas. And the model's data communication was simple: only an equivalent susceptance matrix and the optimal reactive power injection value for external network need be communicated irregularly. Moreover, this model could avoid raising confidentiality issues because it need not exchange explicit structure and constraints information between different TSOs. Efficacy of the proposed model was illustrated through simulations on two IEEE systems and an application to an actual system. © 2012 Elsevier Ltd. All rights reserved.

Zhang Z.-X.,Sichuan Electric Power Research Institute
Gaoya Dianqi/High Voltage Apparatus | Year: 2011

With the accelerating construction of strong smart grid, and the grid voltage level rising, performance requirements for the electrical insulation of electrical equipment also continue to increase. In terms of the advantages of RTV on antifouling, the ability of RTV-based paints coated insulator against pollution conditions can significantly increase, mainly due to RTV coating with hydrophobicity and migration. But when the hydrophobic surface is in the fully wet, many small drops of water on the surface will be gathered into to form large drops of water, which will distort the surface electric field. The flashover voltage of the hydrophobic surface's separated water droplets under DC and AC electric field are analyzed comparatively in this paper, while some influencing factors such as different dielectrics and volume of water drops, are introduced in specific experiments, and their effects on the flashover voltage are analyzed. The flashover voltages are studied for hydrophobic and hydrophilic surface under DC field in order to find the differences of flashover voltage in both cases.

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 | Year: 2011

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.

Xu L.,Sichuan Electric Power Research Institute
Elektrotehniski Vestnik/Electrotechnical Review | Year: 2013

This paper presents the dc-link capacitor balancing control scheme and effective current regulation algorithms for the modular cascaded converters (MCCs). The analytical model for the dc-link voltage balancing and capacitor energy mechanism are presented. Based on the devised control models, an effective control method is devised for the dc-link capacitor voltages, i.e., the sum capacitor voltage controller (SCVC), difference capacitor voltage controller (DCVC). In order to improve the tracking accuracy of the current regulator, the model predictive current controller (MPCC) is devsied and implemented. To minimize the circulating current, an effective circulating current damping controller (CCDC) is proposed by using a proportional-resonant controller. Digital simulation of the single-phase five-level MCC is carried out using the Electromagnetic Transient Program, which confirms the validity of the devised algorithms.

Ye C.-Y.,Sichuan Electric Power Research Institute
Advanced Materials Research | Year: 2014

HVDC converter station noise problem is getting attention by the relevant departments. The noise of converter stations is mainly generates by the converter transformers, smoothing reactor, AC and DC filter and valve outer cooling fan equipment, on this basis, the converter station noise control must be integrated into a variety of factors. In this paper, the noise source control, noise propagation route control and protection noise receptor were studied and explored. © (2014) Trans Tech Publications, Switzerland.

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