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Liaoning, China

Tan S.,Shanxi Electrical Vocational and Technical College | Yang J.,China Agricultural University | Sun W.,Anshan Power Supply Company
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011

Power system simulation and plan are considered as essential tools for design, operation and control of power systems. The existing software for power system simulating and planning is essentially desktop application, which limits its application power. Due to the worldwide expansion of interest in Internet in the past few years, an Internet-based application development has appeared in some technical fields. A great progress on the Internet technique makes it easy to implement the Web-based system. In this paper a process is described for implementing the Internet-based simulation and plan platform of power systems. The platform supports some necessary calculation or analysis methods of the power system simulation and plan, such as load flow calculation, short circuit calculation, harmonic analysis, load forecasting, plan optimization of electric networks, and economic analysis. The cookies in the client-side and the session state objects in server-side are used for data exchanging between Web pages. Both XML documents and databases are supported for interchanging input data and results between Web servers and clients. The structure of XML and the way to construct the Web services are discussed. The development environment of the platform is analyzed. © 2011 IEEE. Source

Wang Y.,Beijing Kedong Electrical Power Control System Co. | Xu S.,Beijing Electric Power Company | Wang J.,Beijing Kedong Electrical Power Control System Co. | Xue Y.,Beijing Kedong Electrical Power Control System Co. | And 2 more authors.
Proceedings of 2015 4th International Conference on Computer Science and Network Technology, ICCSNT 2015 | Year: 2015

NAT (Network Address Translation) traversal is one of the main obstacles to restrict the development of SIP (Session Initiation Protocol). This paper analyzes problems about SIP/NAT traversal and proposes a scheme for SIP operating through NAT with the cooperation of SIP server and RTP relay server and designs the architecture of the relay server according to the characteristics of the mobile Internet environment. This paper presents the principle and the architecture of the scheme, and describes the implementation how SIP traverse all kinds of NAT. © 2015 IEEE. Source

Yi C.,China University of Mining and Technology | Shi J.,Anshan Power Supply Company | Zhao X.,China Academy of Building Research | Zhao W.,Beijing Building Research Institute of CSCEC | And 2 more authors.
Applied Mechanics and Materials | Year: 2011

As pointed out in this paper that, for a common building material, it is relatively difficult to judge its green degree in comparison with that for a special function material because the judgment factors are comprehensive. The relevant factors which affect the greenness index such as physic expenditure, pollution, economic are analyzed and all influential factors are discussed. For the common building materials, their different inter-restrain factors are divided in administrative level and the weight of factors is determined according to the AHP theory. Meanwhile, the assessment scale and criteria for the factors, and the grading standard for the material green degrees are given in the paper. Based on the fuzzy comprehensive evaluation theory, a green degree evaluation model is established. Finally, the reasonability of the model is testified with the instances introduced in the paper. © (2011) Trans Tech Publications. Source

Yan L.,North China Electrical Power University | Wang Z.-H.,Anshan Power Supply Company | Qi B.,North China Electrical Power University
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

A multi-channel master radio station is designed and realized with GNU Radio and its associated device Universal Software Radio Peripheral(USRP) in this paper. The master radio station is all-around compatible with existing radio stations, covering 230 MHz full-duplex frequencies, running at multi-frequencies simultaneously and carrying on full-duplex communications in different rates and modulation modes. The solution in this paper can take full use of the 230 MHz wireless frequency resource, increase the terminal access number, improve the reliability and flexibility of the communication system, and effectively decrease the cost of maintenance and upgrade at the same time. Source

Wang L.D.,ShenYang Agricultural University | Zhang Y.,ShenYang Agricultural University | Han C.C.,Anshan Power Supply Company | Li Z.,Kangping Power Supply Company
Applied Mechanics and Materials | Year: 2013

The short-circuit test is an important topic on the study of transformer features. With the shunt capacitor paralleled to the tested transformer, the test current can be reduced by the resonant of the capacitor and the inductance of transformer winding. Furthermore, using the high frequency power supply, the capacitor can be reduced in the resonant point because the high frequency values. In this work, the simulation model of short-circuit test of transformer with different frequency power supply is designed. Under variable frequency power supply, which are 50Hz,100Hz and 150Hz, the shunt capacitor's value is given. From the simulation results, the application of the shunt capacitor takes a role in the short-circuit test of transformer. This has a significance role in transformer test research and engineering application field. © (2013) Trans Tech Publications, Switzerland. Source

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