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Guo T.,Dalian University of Technology | Liao S.,Dalian University of Technology | Cao L.,Dalian University of Technology | Cheng C.,Dalian University of Technology | And 2 more authors.
Dianwang Jishu/Power System Technology | Year: 2014

In allusion to the difficulty in real-time information acquisition of small hydropower stations, taking the widely used smart phones as the information carrier and the mobile communication network with wide coverage area and the wireless network as the information transmission medium, a three-section extensible information encoding mode is designed and an Android platform based information acquisition system for small hydropower stations is developed. The communication mode, overall scheme, design process and functional structure of the proposed system are discussed, and the key technique to realize the software such as the design of general controls, the information encoding generator, the SQLite based data-caching mechanism and the 96-point intellectualized scheduling are expounded. Finally, the practicality and good extendibility of the proposed system are validated by the success application of the proposed system in small hydropower administration of Yunan power grid.


Liao S.,Dalian University of Technology | Ying X.,Dalian University of Technology | Li G.,Dalian University of Technology | Cheng C.,Dalian University of Technology | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2011

In view of the provincial grid's complex structure, close connection between the elements, and difficulty in maintenance scheduling planning, a decision support system (DSS) based on rich Internet applications (RIA) technique is presented to monitor and dynamically display maintenance scheduling. The object-oriented method is adopted to abstract and describe the primary components' characteristics of the electric power system. The RIA technique is used to display the whole electric power topological structure. More important, the DSS is capable of detecting the "detached islands" of automatic maintenance scheduling using the breadth-first search approach. Meanwhile, the incorrect maintenance arrangements detected will be automatically presented to users together with suggestions for correct and rational scheduling, effectively enhancing the accuracy and reliability of maintenance scheduling. The practicality and flexibility of the DSS proposed are verified in Yunnan power grid. © 2011 State Grid Electric Power Research Institute Press.


Li G.,Dalian University of Technology | Ying X.,Dalian University of Technology | Cheng C.,Dalian University of Technology | Cai H.,Yunnan Electrical Power Dispatching and Communication Bureau | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2011

In view of the significant influence of the provincial power plant scheduling mode on the safe operation of the prefectural grid, a management mode of joint scheduling by provincial and prefectural power grids is proposed. Furthermore, a province-prefecture integrated power plant scheduling management system is designed and developed using the currently popular system architecture and programming techniques. The overall structure design is described along with the functional module design, the management process design as well as the relationship with the other systems available and ways of implementation. The system is successfully operating in Yunnan power grid and has realized the joint management of 65 power plants in 16 prefectural power grids. © 2011 State Grid Electric Power Research Institute Press.


Liao S.,Dalian University of Technology | Liu X.,Dalian University of Technology | Liu B.,Dalian University of Technology | Cheng C.,Dalian University of Technology | Cai H.,Yunnan Electrical Power Dispatching and Communication Bureau
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013

The power grid dispatching management system supported by the province-prefecture-county integrated model can effectively realize unified dispatching, management and monitoring of the power grid. However, one of the most outstanding challenges in the system construction is how to ensure transmission security of vast quantities of information and data between different dispatching institutions and plants. In view of the problem of "role flood" in data transmission, an improved role based access control (RBAC) model with the access description method of "user-role-page-permission" is proposed, and an open-hierarchical user permission scheme is presented. By taking into account the construction of database, the definition of hierarchical institutions and the design of extended permission, this paper focuses on key techniques for the implementation of the hierarchical user permission scheme. The effectiveness of the scheme is shown by its successful application to the small plant management system of Yunnan province-prefecture-county integrated power grid. © 2013 State Grid Electric Power Research Institute Press.

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