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Applied Study of On-line Oil Chromatogram Monitoring for Transformer in Nanning Power Grid 220kV Substation

Author: LiangWenYan
Tutor: TangJu；WuPeiZuo
School: Chongqing University
Course: Electrical Engineering
Keywords: Transformer substation Substation equipment Condition-based maintenance Regular maintenance Online monitoring
CLC: TM407
Type: Master's thesis
Year: 2008
Downloads: 275
Quote: 1
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Abstract


This article describes the Nanning grid substation equipment Description and substation equipment maintenance of the status quo, to analyze the pros and cons of electrical equipment preventive maintenance and condition-based maintenance. Transformer as the main power supply of the electric power system equipment, reliable operation of the degree is directly related to the safe operation of the power system grid. The analysis of dissolved gases in oil gas chromatography transformer internal fault detection means. With the development and operation of the grid voltage increases, the oil dissolved gas gas chromatographic analysis technology and continuous improvement by conventional chromatographic techniques to the current on-line monitoring, and fundamentally a qualitative leap. Home and abroad, several existing oil detection device of the present situation, combined with the impact of conventional oil chromatographic analysis of the factors and sources of error in the main transformer of the substation transformer oil to penetrate the membrane gas six dissolved gas line monitoring, accurately reflect the actual operation of the transformer, high reliability, can be used as the main basis for main transformer condition-based maintenance. This article to build services in the state of repair of transformer oil chromatography-line monitoring system, combined with the current line monitoring pilot Sha Tin change Ann City becomes the main change oil gas application and implementation of online monitoring technology, summarizes the assessment transformer online monitoring data pilot experience of the insulating state the transformer site operating conditions and failure diagnosis and the measured data were analyzed on installed in Sha Tin, Anjo pilot substation of the main variable oil gas online monitoring system to detect to the data with conventional detection method to get the data compare, after a year of running the test results show that MGA2000-6 system, MGA2000-6-01 device running reliable, stable measurement data, to correct a comprehensive reflection of the transformer insulation and health. Same time, with the establishment of the technical supervision of the MIS system, online monitoring oil the chromatography data into and test report, chromatography data processing and analysis system, the initial realization transformer fault diagnosis and condition-based maintenance, reached the advanced level in the field . Also found shortcomings, to further refine and improve the content. In short, through this research, various soft and hard system is stable, the main transformer power outage schedule reasonable, safe and stable operation of the power grid has played an important role.

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > General issues > Maintenance,repair
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