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A Study of Safety Technique Upon Collaborative Information Between Digital Substations

Author: LiuNian
Tutor: XiongXiaoFu
School: Chongqing University
Course: Electrical Engineering
Keywords: Digital substation Between stations Security technology Collaborative diagnosis Error lockout prevention
CLC: TM63
Type: Master's thesis
Year: 2011
Downloads: 64
Quote: 0
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Abstract


Associated with the development of the smart grid, digital substation has become a new generation of technology trends substation. Digital substation technology is in the development process, the security and reliability of their equipment running is the focus of everyone's attention. At the same time, digital substation network information security technology research into equipment provides reliable redundant information, so that it has the technology based collaborative information to achieve a variety of new fault diagnosis method and anti mislock feasibility. Establish mislock method based on the information between electronic transformer cooperative diagnosis method with the station operating anti, respectively. Research based on the power of collaborative information system security technology, the existing electronic transformer fault diagnosis method and anti-misoperation technical measures defects and deficiencies. The digital substation architectures decided its advantages of information sharing and status diagnosis. The paper based on this characteristic, security risk analysis of the electronic transformer station and switch electrical utilization stations, respectively, to achieve interoperability between the two types of devices online diagnostics and error lockout prevention. The theoretical basis for interoperability between IT information fusion technology, data communications and sampling synchronization of the key factors affecting information fusion. Sampling synchronous way data communication between the substation and station analysis, the object of this study data communication and synchronous sampling methods were proposed. By electronic transformer measurement channel characteristics of experiments to study the transformer input and output characteristics, combined with the characteristics of the transformer measuring value changes in the grid under different operating conditions, and a synergy between electronic transformer stations based on wavelet method diagnostic methods, typical cases and MATLAB Wavelet Toolbox Wavelet Toolbox, simulation verify the effectiveness of the proposed scheme. Error lockout prevention method based collaborative digitization of information between the substation operation, status information is grounded knife through acquisition, to achieve the closing circuit of the transmission line transmission lines on both sides or more side grounding switch is not opened automatically. atresia. Through long-term on-site engineering tests show that the developed system can be an effective solution to the early-warning station with a ground knife closing and latching problems, to guarantee electrical equipment and personal safety.

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Substation
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