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Rui C.,Tsinghua University | Guang-Yu H.,Tsinghua University | Wei T.,Tsinghua University | Yong D.,Fujian Electrical Power Dispatch and Communication Center
IEEE Power and Energy Society General Meeting | Year: 2011

This paper presents an index set to assess the status and ability of the smart-grid operation. In this paper, the "ability of multi-objective self-approximate-optimal operation" is considered as the most distinctive difference between smart grid and traditional power grid. Since the objectives of grid operation are to satisfy demands from electric system stakeholders, a multilevel set of the key smart-grid objectives is proposed with analysis and summary of these demands. Moreover, an index set that consists of a series of key indices for grid operation is identified around the objective system. © 2011 IEEE.


Ni J.,Tsinghua University | He G.,Tsinghua University | Shen C.,Tsinghua University | Deng Y.,Fujian Electrical Power Dispatch and Communication Center | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2010

The crucial values, principal characteristics and key technology areas of the smart grid in America are elaborated. Based on the above three perspectives, an assessment model for the smart grid is described. While emphasizing the value metrics and build metrics, the assessment index system of the smart grid is given. Some current smart grid assessment results in America using the index system are illustrated. Finally a couple of revelations to assessment of China's smart grid are obtained. ©2010 State Grid Electric Power Research Institute Press.


Zhao J.,Hohai University | Wang Y.,Hohai University | Li K.,Fujian Electrical Power Dispatch and Communication Center | Fang Z.,Fujian Electrical Power Dispatch and Communication Center | Huang W.,Fujian Electrical Power Dispatch and Communication Center
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2010

On-line voltage stability assessment (VSA) of power system based on load margin computation has been a basic module in modern EMS. However, the static load voltage characteristics, OLTC, switchable shunt capalitor, under-voltage load shedding are not considered in most VSA tools. Furthermore, the thermal limit violation induced branch outage is not considered either. Therefore, the maximal power limits obtained in VSA are not of practical significance, and not meet the security alarming and preventive control requirement. A novel on-line static VSA method based on continuation power flow technique is proposed. The effects of load voltage characteristics, automatic devices and relays of transmission lines are considered. The proposed method has been tested on a practical system in China. The numerical results show that the proposed method is more suitable for on-line voltage stability assessment. © 2010 State Grid Electric Power Research Institute Press.


Tan W.,Tsinghua University | He G.,Tsinghua University | Liu F.,Tsinghua University | Huang W.,Fujian Electrical Power Dispatch and Communication Center | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2010

As an important energy consuming channel, electric power plays a considerable role in reducing fossil energy consumption and cutting down CO 2 emissions. The significance of developing low-carbon electricity is illustrated, and the necessity for establishing a smart grid's index system is pointed out. The functions of the smart grid's low-carbon index system are discussed. The aim and outcome of the system are defined. The relative design principle, method and evaluation indices as well as the realization steps are presented. A look ahead is given to the application of the index system. © 2010 State Grid Electric Power Research Institute Press.


Xia K.,NARI Group | Chen G.,NARI Group | Li L.,NARI Group | Huang W.,Fujian Electrical Power Dispatch and Communication Center | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013

Based on multi-source information, a real-time comprehensive analysis method for faults in power grid is presented. The power grid fault information acquired by the power dispatching data platform from the energy management system (EMS), the relay information system and the fault recording system is used. According to the data acquisition characteristics of different sources, a stage-by-stage fault diagnosing method is adopted to analyze the multi-source and multi-type information by stages. And a fault information group technology is presented to solve the problem of information sharing and process coordination among those independent analytic sub-systems. The real-time comprehensive analysis of power grid fault is realized for the concurrent running of multi-source information and multi-algorithm, with an improvement in the relevance and efficiency of analysis and data acquisition. The proposed approach has been successfully applied in Fujian Dispatching and Communication Center. Field running results show that the proposed method is capable of realizing fast, complete and correct comprehensive fault analysis for multi-source information and accurately evaluating the action of relays and breakers. © Right.

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