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Song C.Y.,Tianjin University of Commerce | Li C.D.,Fujian Electric Power Test and Research Institute
Advanced Materials Research | Year: 2014

Simulating Ising model to calculate magnetization intensity by Monte Carlo method. The Ising model was introduced simply, sampled importantly, and calculated with programming. It shows the dependency relationship between the magnetization intensity and the size of dot-square line in different temperatures for Ising model. It cans edulcorate the approximation of analytic method by computer simulating. It obtains a method to appraise a model right or wrong by comparing the model and the experimental data. © (2014) Trans Tech Publications, Switzerland. Source

Cao L.-H.,Jilin University | Zhang H.-L.,Jilin University | Lin W.-B.,Fujian Electric Power Test and Research Institute | Liu J.,Shandong Electric Power Research Institute
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2015

To analyze the flow conditions of the wet steam in the steam exhaust passage of a steam turbine, the software Fluent was used to conduct a numerical simulation of the flow inside the exhaust passage under various incoming flow conditions in combination with a phase-change model and a wet steam flow equation. It has been found that changes in the inlet steam wetness, swirling intensity and steam inlet angle will force the composition, location and intensity of the vortexes in the passage to produce changes. With an increase of the inlet steam wetness, the uniformity of the flow field at the outlet of the exhaust steam passage will enhance to a certain extent. With an increase of the inlet steam wetness, swirling flow intensity and steam inlet angle, the energy loss coefficient of the flow inside the exhaust steam passage will decline. ©, 2015, Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power. All right reserved. Source

Guo Q.-T.,Fujian Electric Power Test and Research Institute | Wu T.,Wuhan University
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

Neutral point ineffectively grounded power system is widely used in 3~66 kV power distribution system in China. In this power system, the single-phase-to-earth fault occurs frequently in distribution, thus how to detect the fault line with great accuracy and high efficiency is an important subject in protective relaying of power system. Reviewing the history of the methods to select the fault line in neutral point ineffectively grounded power system, this paper summarizes the existing theories of fault line selection and gives the conclusions. Source

Zheng J.,Fujian Electric Power Test and Research Institute | Meng Z.,Shandong University | Lin X.,Putian Electrical Power Bureau
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

As there is no common information model of power plant resource in IEC61970/61968, the object-oriented CIM (Common Information Model) of thermal power plant resource is built with UML(Unified Modeling Language) and modeling tool " Rational ROSE " according to the characteristics of China's power plants and the requirements of application systems. The modeling methods and rules, as well as other key technologies, are discussed. The models of equipment, exciter system and resource container for coal-firing power plant are analyzed with examples. Source

Wang L.-M.,Tsinghua University | Li B.,Tsinghua University | Huang H.-K.,Fujian Electric Power Test and Research Institute | Mei H.-W.,Tsinghua University | And 3 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2010

Accidents caused by the pollution flashover have been threatening the safety of our power grid for a long time. The online monitoring of the leakage current of insulators is of great value to the job of discovering the theory of pollution flashover and preventing the pollution flashover. And whether we could get the satisfying result of the experimentation depends on the performance of the leakage current monitoring system we use. In this paper a novel 19-channel leakage current online monitoring system for natural pollution deposit test is introduced, including the hardware, the software of the system and experimental verification. According to the deficiencies of existing monitoring systems, this novel leakage current monitoring system has lots of advantages, such as 19-channel, high measuring precision, wide range measurement, data transmission based on 3G, recording and reporting the faults automatically. It can be used in the long-time polluted insulator aging test in the substation or lab and will be applied in the substation of natural pollution deposit test soon. Source

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