Piao Zailin

Power quality disturbances classification Based on multi-class classification SVM

this paper used the multi-class classification for support vector machine and combined with the good amplitude-frequency characteristic of fourier transform,the good time-frequency characteristics of wavelet transform and the excellent statistical learning ability of support vector machine to make the classification and recognition to the disturbances of power quality. Mathematical modeling for the 8 kinds of common power quality disturbances, namely voltage swell, voltage sag, voltage interruption, harmonic, voltage fluctuation, transient oscillation , transient pulse and frequency deviation, and then use fourier transform and wavelet transform to extract the characteristics of the waveform of the generated samples, and input the characteristic value to the osu_svm and do the quality disturbances Multi-class Classification. The example shows that this method has a high recognition accuracy, a few training samples and training time is short, a good real-time performance, and is not sensitive to noise, etc. It is an effective method for Power quality disturbances classification.

Power flow calculation for radial distribution systems with distributed generation

Through the analysis of wind turbines, photovoltaic systems, fuel cells and high frequency micro turbines, their models in power flow calculation were established in this paper. Moreover, a novel power flow algorithm based on back/forward sweep technology for radial distribution networks considering Distributed Generation (DG) is proposed. The algorithm develops a reactive power compensation method applying reactance matrix to handle all PV nodes in power flow studies (PFSs). A 33 bus test system is used to validate the proposed method. The simulation results show that the method is feasible and effective. Finally, the impact of DGs on voltage profile is analyzed using this method.

The research on the integration of energy storage and generating wind turbine system model

In order to improve the wind power penetration, control the volatility of the wind, this paper has carried out the research on the integration of energy storage and generating wind turbine system model. The idea has been gained based on the analysis of the current wind turbine system, wind turbine system with low wind speed starting and running and the integration of energy storage and generating wind turbine system. Local energy storage, distributed energy storage and centralized energy storage has been discussed in this paper. Two kinds of wind turbine system model based on local energy storage which are energy storage in the front of generator and in the back of generator also have been studied.

The performance study of new type carbon fiber heating soft board

Taking the use of carbon fiber electrical conductivity, the design of thermal conductivity and development of carbon fiber heating soft board to introduce the principle of design, development and test of the carbon fiber heating soft board. The carbon fiber heating soft board can be processed into various kinds of fabrics and the design and development, have a broad market prospect.

A study of the suitability of new type carbon fiber electric heating soft board applying to intermitten heating room

Experimental methods were taken to analyze the suitability of electric-powered radiant floor heating applying to intermittent heating room. The thermal comfort, response time and energy consumption of domestic air conditioning and electric heating carpet was compared. The electric heating carpet was dominant on response time of heating the rooms lower space. The operative temperature of lower part of the room was higher than the upper part when carbon fiber electric heating soft board heating stabilized, while the air conditioning leads to an opposite result. The results prove that the temperature gradient was smaller when carbon fiber electric heating soft board was utilized, which makes up its lower COP to some extent.