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Research on Insulation Damp Fault Features and Warning Methods of Capacitance Equipments

Author: HuaJingJing
Tutor: WangYongQiang
School: North China Electric Power University
Course: High Voltage and Insulation Technology
Keywords: Capacitive Equipment Online monitoring Dielectric loss factor Predictive Failure Forecast
CLC: TM855
Type: Master's thesis
Year: 2011
Downloads: 32
Quote: 0
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Abstract


Capacitive Equipment is an important power transmission equipment , reliable and stable operation is an important factor in the production of protection of power system security . Capacitive Equipment fault diagnosis system applied to the current approach to development and the pace of development of the failure of equipment failure or malfunction obvious symptoms are difficult to predict , so research Capacitive Equipment failure warning has theoretical and practical value . Capacitive Equipment common damp failure as research content , damp failure severity insulating properties and early warning , completed work and achieved major results are as follows : monitoring the needs of the capacitive type equipment failure characteristics , This article is based virtual instrument technology , developed a test system of the insulating properties of a set of high-precision capacitance -type equipment . The test system uses a high-speed synchronous digital measuring technology , the use of the harmonic analysis method to calculate the dielectric loss factors , tested and running , the system is reliable and stable , accurate data acquisition . For Capacitive Equipment insulation moisture typical failure the fault models design based on the real device ontology Capacitive Equipment damp , and produced a corresponding fault model . Artificially set the damp failure based on the model of the current transformer , the the applications capacitive type equipment insulating properties completion of the test system the current transformer damp fail the test as a basis for analysis of water content in the insulating oil of Capacitive Equipment insulation characteristics the impact of the parameters , the curve of the water content and tanδ, discharge current , resistive current and capacitance , the exploration the insulation damp failure of different severity warning value . Tanδ of water content prediction model based on experimental data , development route and rate of the water content of the faulty equipment . Finally, by an example to verify the feasibility of tanδ as characteristic quantities of water content in the insulating oil capacitive type equipment failure warning threshold .

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > High - voltage insulation technology > Insulation test and inspection
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