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Fan S.,Shandong University of Science and Technology | Xu B.,Shandong University of Technology | Xu B.,Kehui Power Automation Co. | Zhang Q.,Shandong University of Technology
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2012

A new method for fault line selection in distribution system with arc suppression coil grounding with square-wave signal injection is proposed. A low frequency square-wave signal is injected from the secondary side of bus voltage transformer, the phase currents flowing through each feeder are detected, and then the relationships of the amplitudes of their fundamental and the third harmonic components are analyzed to select the fault line. The principle of the method is introduced in detail, and the criterion of fault line selection is proposed as well. The analogical test results show that the method has good ability to eliminate the influence of distributed capacitance and the detection accuracy is improved with large grounding resistance. © 2012 State Grid Electric Power Research Institute Press. Source


Han G.,Shandong University | Xu B.,Shandong University of Technology | Xu B.,Kehui Power Automation Co.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2011

Based on the analysis of distribution terminal functions, the FTU information model and TTU information models are built with the modeling methods, techniques, data models and logic nodes supplied by IEC61850 to realize the plug-and-play of distribution terminal. The communications between distribution terminal and master station and between distribution terminals are analyzed, the applicable IEC61850 information exchange model is presented, and the mapping of client/server model to MMS or to IEC60870-5-101/104 is introduced. Source


Han G.-Z.,Xian Jiaotong University | Han G.-Z.,Shandong Polytechnic University | Xu B.-Y.,Shandong University of Technology | Xu B.-Y.,Kehui Power Automation Co. | And 3 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2013

To reduce the debugging and maintenance work of a large number of field automation terminal units accessing to distribution automation, an open, plug and play terminal unit supporting communication architecture is proposed. The use of IEC 61850 logical nodes to distribution automation is analyzed. As an example, the device information model of pole-mounted feeder terminal unit (FTU) is established. A new mapping profile (Web Services + IEC 60870-5-104) suitable for distribution automation is proposed. In this mapping profile, Web Services is used for information model exchanging and IEC 60870-5-104 is used for real-time data transferring. A prototype system is developed. The system demonstrates that the seamless communication supporting plug and play between the master station and FTU can be realized using the proposed modeling and mapping methods. Source


Han G.,Shandong University | Xu B.,Shandong University of Technology | Xu B.,Kehui Power Automation Co.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2011

A layered IP network scheme for distribution automation(DA) is proposed based on an analysis of the demand of the DA communication system. The entire network is divided into the backbone network and the branch network. The former connects the master station in control center with the DA gateway in transformer substation while the latter connects the gateway with the distribution terminal. The performance and data traffic of DA IP network are analyzed and it is shown by OPNET simulation and actual application that the IP network can fully meet the requirements of DA. © 2011 State Grid Electric Power Research Institute Press. Source


Xu B.,Shandong University of Technology | Xu B.,Kehui Power Automation Co. | Li T.,Fujian Power Company | Li T.,North University of China
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2010

Various existing definitions on distribution automation (DA) are introduced. The suggested DA definition comprises distribution operation automation and management automation. The role of DA in improving reliability and its economic benefits are discussed. It is pointed out that DA investment is justified only when customer outage cost is taken into consideration. The Application of DA is presented. Suggestions on the solution of key DA technologies and DA system planning are given. ©2010 State Grid Electric Power Research Institute Press. Source

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