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Study on the Method of Condition-based Maintenance of Relay Protection

Author: XiaYing
Tutor: XiongXiaoFu
School: Chongqing University
Course: Electrical Engineering
Keywords: State of repair Relay State diagnosis State assessment Meteorological factors
CLC: TM774
Type: Master's thesis
Year: 2010
Downloads: 261
Quote: 1
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Abstract


For a long time, the protection equipment maintenance is carried out regularly test the main principle of corrective maintenance, supplemented. With the continuous development of the power system, the grid structure is increasingly complex, and increasingly wide range of distribution, increasing workload and cost of maintenance. In addition, with the full use of microcomputer relay protection device self-test levels continue to improve, if more repair-based approach to periodic inspection, will only lead to repair, reduce the stability and reliability of the equipment running, and at the same time causing human , waste of material and financial resources. Therefore, routine periodic inspection system to protect the equipment maintenance and outdated, the state must be based on the actual operational status of the implementation of protective equipment maintenance, and to adapt to the needs of the power system development. Has achieved certain results in the theories and methods of the state of repair of the primary equipment, protection equipment state maintenance and engineering has just begun, and more practical results. Based on this, the relay state maintenance method study specifically to complete the following work: This article describes the connotation of the power system state maintenance on the relay state the importance of monitoring the state of repair, and pointed out that the protection equipment state maintenance problems. The key to the maintenance of relay protection status status diagnosis, condition assessment and maintenance decision-making method. This article will relay protection device the state diagnostic methods, state diagnostic division diagnosis of two categories for the diagnosis of static characteristics of the state and the dynamic characteristics of the state, determine the appropriate diagnostic methods. Protection device protection devices according to the physical structure and course of action to establish risk assessment model state space; using equipment pre-test The family quality defects, equipment history, quality of working conditions, and management data based equipment inspection and operation of management information state assessment method. Comprehensive assessment method based on the three elements of the state diagnostic information, risk assessment, equipment inspection and operation of management information relay state. Establish a protection device status assessment methods based on state assessment results to determine the state of repair time is another key issue. Papers based on the analysis of the need to protect maintenance plan formulated taking into account the weather conditions, taking into account the weather conditions relay maintenance decision-making method, the focus of research to consider short-term maintenance plan, long-term maintenance plan with different meteorological factors, different Meteorological stage protection maintenance risk analysis calculation method. The numerical example shows the effectiveness of the proposed method.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system protection > Protection devices
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