作者机构：
[Zeng, Zhe-Zhao; 郝逸轩; 肖雅芬] College of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410014, China
通讯机构：
[Zeng, Z.-Z.] C;College of Electrical and Information Engineering, Changsha University of Science and Technology, China
作者机构：
[范必双; 邓泽林; 谭冠政] School of Information Science and Engineering, Central South University, Changsha 410083, Hunan Province, China;[樊绍胜] School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410076, Hunan Province, China
通讯机构：
School of Information Science and Engineering, Central South University, China
关键词：
三电平逆变器;虚拟矢量;混合空间矢量调制;电容电压平衡;时间分配因子
摘要：
针对二极管中点钳位型(neutral point clamped,NPC)三电平逆变器容易造成直流侧电容电压不平衡问题,提出一种新的中点电位平衡控制方法。在该方法中,采用分扇区精细控制,对不同的小矢量设置不同的时间分配因子,以增加相应正或负小矢量对中点电流的控制能力。对于正负小矢量不能成对出现的扇区,根据相电流的变化情况,使调制在传统算法和基于虚拟矢量的算法之间切换,从而削弱中矢量对中点电流不可控的影响。仿真和实验证实了该方法的正确性和有效性。
期刊：
International Journal of Digital Content Technology and its Applications,2012年6(23):560-568 ISSN：1975-9339
通讯作者：
Peng, H.(huipeng@mail.csu.edu.cn)
作者机构：
[Xi, Yanhui; Peng, Hui; Ruan, Chang] College of Information Science and Engineering, Central South University, Changsha 410083, China;[Xi, Yanhui; Peng, Hui] Hunan Engineering Laboratory for Advanced Control and Intelligent Automation, Changsha 410083, China;[Xi, Yanhui] Electrical and Information Engineering College, Changsha University of Science and Technology, Changsha 410077, China
摘要：
This paper develops a discrete time microstructure jump model with nonhomogeneous Poisson process. Because the jump intensity is changed with time, the jumps are detects using a new nonparametric method proposed by Suzanne S. Lee. On the basis of this analysis, its parameters are estimated by combination of extended Kalman filter(EKF) and maximum likelihood (ML) method. Simulation results and case study show the effectiveness of the estimation method.
期刊：
IEEE Transactions on Energy Conversion,2012年27(2):213-219 ISSN：0885-8969
通讯作者：
Tang, Xin
作者机构：
[Tang, Xin] Changsha Univ Sci & Technol, Dept Elect Engn, Changsha 410076, Hunan, Peoples R China.;[Tsang, K. M.; Chan, W. L.] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China.
关键词：
Active power filter (APF);distributed generation (DG);unified control
摘要：
This paper presented an expandable grid-connected power quality compensator with distribution generation interface for three-phase three-wire system. The proposed system not only can control the active power flow, but also mitigate load unbalance, harmonics, and manage reactive power. The power quality compensator can simultaneously perform the two functions of power control station and active power filter or either one. To make the system more flexible, the grid current, instead of output current of the converter, is shaped to be a sinusoidal current in phase with the grid voltage. The reference currents are generated by multiplying the voltage loop controller output by the corresponding grid voltage waveforms. Consequently, harmonic analysis or dq transformation, as required in the conventional design, is not necessary. In this manner, controlling the dc voltage level is equivalent to performing an active power balance for the whole system. As a result, no additional hardware and interface are required. Experimental results verified the effectiveness of the proposed method.
摘要：
为了充分发挥Excel和Matlab各自的优势，实现两者之间的无缝连接并将其应用于电力系统数据分析中，简要分析了DDE（Dynamic Data Exchange）和自动化技术、ExcelLink插件以及通过Excel生成器等3种接口技术。而Excel生成器生成插件又有两种方法，通过一个实例重点介绍了其中一种工作量少、简单方便的方法。通过对保存在Excel中的数据进行处理分析，结果显示这种以Excel为载体、Matlab程序集成到Excel插件处理数据的思想能够很好地弥补Excel没有专门函数处理电力系统数据等功能的缺陷。
作者机构：
[竺炜; Zeng, Zhe-Zhao; 马建伟; 周益华] College of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China;[竺炜] China Electric Power Research Institute, Beijing 100192, China
通讯机构：
[Zhu, W.] C;College of Electrical and Information Engineering, Changsha University of Science and Technology, China
期刊：
Applied Mechanics and Materials,2012年203:406-410 ISSN：1660-9336
通讯作者：
Liu, H.(529000658@qq.com)
作者机构：
[Wang, Kunyang; Liu, Huizhi; Wang, Xuhong] School Of Electrical And Information Engineering, Changsha University Of Science and Technology, 410004, China;[Feng, Juxiang] CSR ZHUZHOU ELECTRIC CO., LTD, 412001, China
通讯机构：
[Liu, H.] S;School Of Electrical And Information Engineering, , 410004, China
会议名称：
2012 International Conference on Mechatronic Systems and Automation Systems, MSAS 2012
作者机构：
[Meirong Liu,; Yigang He; Xiangxin Li] College of Physics and Information Science,Hunan Normal University;[Meirong Liu,; Yigang He; Xiangxin Li] Electric Engineering Postdoctoral Center,Hefei University of Technology;[Meirong Liu,; Yigang He; Xiangxin Li] College of Electrical and Automation Engineering,Hefei University of Technology;[Meirong Liu,; Yigang He; Xiangxin Li] College of Electronical and Information Engineering,Changsha University of Science and Technology
会议名称：
2012 3rd International Conference on Information Technology for Manufacturing Systems（ITMS 2012）
会议时间：
2012-09-08
会议地点：
Qingdao,China
会议论文集名称：
Proceedings of 2012 3rd International Conference on Information Technology for Manufacturing Systems(ITMS 2012 Ⅲ)
关键词：
analog circuit;chaos;fuzzy;neural network
摘要：
An analog circuits fault diagnosis method based on chaotic fuzzy neural network (CFNN) is presented. The method uses the advantage of the global movement characteristic inherent in chaos to overcome the shortcomings that BPNN is usually trapped to a local optimum and it has a low speed of convergence weights. The chaotic mapping was added into BPNN algorithm, and the initial value of the network was selected. The algorithm can effectively and reliably be used in analog circuit fault diagnosis by comparing the two methods and analyzing the results of the example.
