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46 results on '"Gan, Xu"'

1. An Experimental Study of Simplified Model for Air-Core Reactors

Author

Li Zhang, Gan Xu, Tong Zhao, Qingquan Li, and Liang Zou

Subjects
Engineering, Loop (graph theory), Electric power system, Speedup, Control theory, business.industry, Computation, General Engineering, Air core, Process (computing), business, Scaling, Magnetic field
Abstract

With the development of electric power system, Power-frequency Magnetic Field (MF) has become a matter of concern recently. In order to speed up the computation and modeling process, the small-scale experimental technique and simplified model for air-core reactors are introduced as a novel way to assess the MF of air-core reactors in this paper. Firstly, the scaling rules of the parameters for air-core reactors are summarized. Then, the scaling rules modification is put forward to reduce the error. Thirdly, three simplified models were established for air-core reactors, including one loop model, two loops model and three loops model. It is concluded after that the two loops model in configuration 2 can be considered as the optimal simplified model.

Published
2014

2. Investigation on Small-Scale Experiments of Magnetic Field around Air-Core Reactors

Author

Li Zhang, Tong Zhao, Liang Zou, and Gan Xu

Subjects
Scaling methods, Computer simulation, Scale (ratio), Nuclear engineering, Electronic engineering, Air core, General Medicine, Scaling, Mathematics, Magnetic field
Abstract

Air-core reactors have become the main source of electromagnetic contamination in substations. In this project, the scaling methods for small-scale experimental technique will be studied, in order to provide validation of the analytical and numerical calculation, and to help to predict the MF around air-core reactors. Firstly, the scaling rules of the parameters for air-core reactors are summarized firstly. Then a full size, 1/2 size 1/6 size of air-core reactors are put forward in order to study the MF of the origin size by analytical calculation, numerical simulation and small-scale experiment. All the results verify the effectiveness of the scaling rules and the equivalency of small-scale experiments.

Published
2014

3. Simulation on Vibration Isolation System for Vibratory-Drum Test Stand

Author

Zhi Feng Zhang, Yun Shi Yao, Xian Ning Kong, and Hui Gan Xu

Subjects
Vibration, Engineering, Vibration isolation, business.industry, medicine, Stiffness, Mechanical engineering, General Medicine, Drum, Structural engineering, medicine.symptom, business, Test (assessment)
Abstract

the reliability and vibration performance test of vibratory rollers have been done in the test field to ensure that the vibratory roller meet the quality requirement. At present, the indoor test stand for vibratory roller has not yet been studied at home and abroad. This paper designs the indoor test stand for vibratory roller and makes simulation analysis by the numerical model of vibration-drum and test stand. The vibration isolation system of test stand is determined as a function of the test stand mass (m2), the stiffness of rubber tire (k1) and the stiffness of the vibration isolation block (k2). The test results showed that the vibration drum-test stand model can account for the vibration isolation system.

Published
2013

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