Zhengzhou Electrical Power College

Henan’an, China

Zhengzhou Electrical Power College

Henan’an, China
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Zhang X.,Zhengzhou Electrical Power College | Ren Y.,Zhengzhou Electrical Power College | Hu Q.,Zhengzhou Electrical Power College
Journal of Chemical and Pharmaceutical Research | Year: 2014

The parameters of synchronous generators are the basis of power system analysis and operating control. Parameters identification of synchronous generator plays a key role for the power system stability analysis. In this paper, a small population-based particle swarm optimization (SPPSO) approach is used to acquire synchronous generator on-line model quickly and accurately. In the proposed approaches, three operations are introduced to improve the performance of the algorithm, namely mutation operation, DE-acceleration operation and migration operation. Furthermore, the synchronous generator practical model and the PMU data are adopted. The simulation results of the model obtained by SPPSO have been compared with hybrid genetic algorithm and PSO. The SPPSO algorithm shows better performance on the convergence as well as computation time and effort. © 2014, Journal of Chemical and Pharmaceutical Research. All rights reserved.

Jin C.,Central China Normal University | Wang X.,Zhengzhou Electrical Power College
International Journal of Network Security | Year: 2017

Removable memory device (RMD) is one of main way for propagating computer virus. In this paper, a dynamic propagation model of RMD-virus with varying popula- tion size is discussed. Unlike other computer virus propagation models, the proposed model mainly considers the RMD-virus propagation between host and RMD, which is embodied by introducing the RMD state and new propagation rate. Furthermore, to control the RMD-virus, three threshold parameters are obtained. The simulation results show that the proposed model can serve as a basis for understanding and simulating RMD-virus.

Ren Y.,Zhengzhou Electrical Power College | Zhang X.G.,Zhengzhou Electrical Power College | Huang X.C.,Electricity Trade Union
Advanced Materials Research | Year: 2014

According to characteristics of medium voltage distribution network, use raw data that are easily collected to study an accurate fast and simple line loss calculation method of the medium voltage distribution network, that is the radial basis function neural network algorithm. In order to improve the power system line loss rate accuracy, the paper puts forward using alternating gradient algorithm to improve the radial basis function (RBF) neural network. The simulation results show that the algorithm is feasible. © (2014) Trans Tech Publications, Switzerland.

Zhang X.G.,Zhengzhou Electrical Power College | Ren Y.,Zhengzhou Electrical Power College | Huang X.C.,Electricity Trade Union
Advanced Materials Research | Year: 2014

The increase of the intensive power proportion in distribution network brings new challenges to load dispatch of power plant, and intelligent distribution would be a key issue in the future power integrated system. The paper combined the strength Pareto evolutionary algorithm with the parallel genetic algorithm (PGA),namely the Pseudo-parallel SPEA2 Algorithm for solving the dynamic economic load dispatch problem. This problem is formulated as a nonlinear constrained multi-objective optimization problem, meanwhile, synthetically considers dynamic constraints handling, the minimum of fuel cost and the pollution emission. Besides, the paper analyzed the feasibility and validity of this algorithm in the load dispatch of power system. © (2014) Trans Tech Publications, Switzerland.

Wang Y.,Zhengzhou Electrical Power College | Hao H.,Zhengzhou Electrical Power College
Chemical Engineering Transactions | Year: 2016

The fresh agricultural products are easy to be perishable. During the transport and the storage, they are prone to be deterioration and damage. These risks bring to the great risk to the fresh agricultural products. Therefore, the fresh agricultural products have the very demand for the supply chain. At the same time, the supply chain of the fresh agricultural products in China is in the transition period. During the process of the transition, there will be a series of the unexpected questions. Therefore, it is very necessary to evaluate the supply chain risk. In this paper, in order to overcome the question that the weights of the TOPSIS method are influenced subjectively, we combine the improved entropy method with the TOPSIS method and propose the improved TOPSIS method. Then, we use the method to study the supply chain risk evaluation of the fresh agricultural products. Copyright © 2016, AIDIC Servizi S.r.l.

Zeng X.,Xuchang University | Feng Y.,Zhengzhou Electrical Power College
Lecture Notes in Electrical Engineering | Year: 2012

To facilitate the development and deployment of context-awareness application in pervasive computing, a context-awareness framework needs to be used to adapt to different execution contexts and hide heterogeneity from applications. Therefore, after examining the concept of context and context awareness computing and some key technologies for context-awareness in pervasive computing, including context acquisition methods, context modeling and reasoning, and programming context etc., a dynamic context-awareness framework is put forward to effectively manage the context information and services mobility which has not been supported in the previous models. The model provides the standard interface to realize the interaction among the heterogeneous devices and hide heterogeneity from applications. © 2012 Springer-Verlag London Limited.

Chen H.,North China Electrical Power University | Jiang H.,North China Electrical Power University | Gao J.,North China Electrical Power University | Qu W.,Zhengzhou Electrical Power College
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2011

Acquisition and analysis of pressure fluctuation signal of wind cap which is a new method was proposed to realize the condition monitoring of gas-solid flow in fluidized bed. Under the different superficial gas velocity, bed material particle size distribution and static bed height, the pressure fluctuation signal of wind cap in the cold bubbling fluidized bed test rig was analyzed with the wavelet analysis method. Then, the energy of reconstructed signals at different levels and the ratio of energy at different levels to the total energy could be calculated, the main frequencies of signals could be obtained with Welch method for power spectrum estimation. Finally, the influence of the operating conditions change on the characteristic pressure fluctuation in wind cap of bubbling fluidized bed was analyzed. It is finded that the variation of the low-frequency reconstructed signals are related with the variation of the gas-solid flow condition under the operating conditions change. So the proposed method is proved to be practical and the research achievement can be used as theoretical basis for the characteristic pressure fluctuation in wind cap of circulating fluidized bed. © 2011 Chinese Society for Electrical Engineering.

Wen-Yan Q.,ZhengZhou Electrical Power College | Lin S.M.,ZhengZhou Electrical Power College
Proceedings - 2014 5th International Conference on Intelligent Systems Design and Engineering Applications, ISDEA 2014 | Year: 2014

Multi-unit vibration frequency is low, the state information exist mutual interference problems, the traditional state monitoring method mainly analyzed the signal equipment unit stability, once the state signal equipment units appeared significant volatility, the status of equipment unit monitoring information is unable to obtain accurately. This paper presented the remote condition monitoring method of multi unit multi sampling frequency signal operation technology, signal acquisition unit respectively for each device by different sensors, the equipment unit state signal by preprocessing and converted into discrete device status signal, according to the equipment state signal sampling factor, the discrete device status signal multi rate sampling, processing, through the wide area network to a multi rate processing equipment after the state signal, transmitted to the remote receiver, analysis the equipment state signal correlation in the remote receiving end, realize remote real-time monitoring state of equipment unit. Simulation results show that, under the internet of things, the proposed method for multi unit state monitoring efficiency and accuracy are better than the traditional method, is an efficient remote condition monitoring method for multi unit. © 2014 IEEE.

Qiu W.-Y.,ZhengZhou Electrical Power College | Shan L.,ZhengZhou Electrical Power College
Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015 | Year: 2015

AT89C51 single-chip micro controller is used as the core and MAX440 based video matrix switching system is designed, which is divided into selection input module, control processing module and video switching. From whole to part, it has a detailed introduction of the selection of power supply, input of the system, processing of single chip micro controller, MAX440 application and video line selection of video output. The circuit connection diagram and instructions are also given. At the same time, program of corresponding modules are given. © 2015 IEEE.

Zhang Y.S.,Henan Electric Power Research Institute | Wang C.Y.,Henan Electric Power Research Institute | Wang L.,Henan Electric Power Research Institute | Cheng J.W.,Henan Electric Power Research Institute | Qiao K.,Zhengzhou Electrical power college
Advanced Materials Research | Year: 2013

People pay more and more attention on the fine particle pollution in the air with the improvement of environmental awareness. Coal-fired power plant is an important source of the fine particle emissions. The principles of three dedusting methods applied in coal-fired power plants were explained, which were electrostatic precipitator, bag deduster and composite electrostatic-bag precipitator. In addition, PM2.5 removal efficiency of three dedusting methods was analyzed and discussed based on the test results. The experiment, with the "AFC-131"test rig, was carried out on dedusting performance of typical filters, to study the effect of pressure drop of filters on the emission characteristics of PPS filter material of different processing technology and posttreatment. © (2013) Trans Tech Publications, Switzerland.

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