A STUDY ON THERMAL AND ELECTRICAL STRESSES OF POWER TRANSFORMERS
Rehab Ahmed Saad Elshourbagy;
Abstract
Key Words:
Top oil temperature ; Hotspot temperature; Transient over voltage; Transformer Life time
Summary:
Power transformers are intended to withstand system abnormalities such as over voltages and overloads.Diagnostics and monitoring of transformer are the effective methods to prevent failures and ensure the network reliability.The solid insulation of power transformers is a function of time which depends on the temperature, moisture amount, acids and oxygen in the insulation system.This thesis focuses on thermal and electrical stresses that affect the insulation of power transformer and hence cause aging of power transformer. IEEE loading guide and IEC 60354 equations were modeled and thermal model is studied to estimate transformer topoil and hotspot temperature. Transient overvoltage is studied also to show how the power transformer can be exposed to electrical stresses causing insulation overheating. Remaining service life of the transformer is estimated through degree of polymerization of paper (DP) insulation.
Top oil temperature ; Hotspot temperature; Transient over voltage; Transformer Life time
Summary:
Power transformers are intended to withstand system abnormalities such as over voltages and overloads.Diagnostics and monitoring of transformer are the effective methods to prevent failures and ensure the network reliability.The solid insulation of power transformers is a function of time which depends on the temperature, moisture amount, acids and oxygen in the insulation system.This thesis focuses on thermal and electrical stresses that affect the insulation of power transformer and hence cause aging of power transformer. IEEE loading guide and IEC 60354 equations were modeled and thermal model is studied to estimate transformer topoil and hotspot temperature. Transient overvoltage is studied also to show how the power transformer can be exposed to electrical stresses causing insulation overheating. Remaining service life of the transformer is estimated through degree of polymerization of paper (DP) insulation.
Other data
| Title | A STUDY ON THERMAL AND ELECTRICAL STRESSES OF POWER TRANSFORMERS | Other Titles | " دراسة عن الاجهادات الحرارية والكهربية لمحولات القدرة" | Authors | Rehab Ahmed Saad Elshourbagy | Issue Date | 2017 |
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