The Research on Calculation of Temperature Field of Winding in Dry Type Transformer

Gao, Shengwei; Mu, Zhongcheng; Sun, Xing-tao; Yuan, Chenhu; Wang, Ning; Li, Xin

doi:10.1109/icinis.2012.39

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The hottest spot is usually considered to be the insulation weakness of dry-type transformers, which can provide a reference for the effective monitoring of dry-type transformers [20] [24]. When the hot spot temperature of the transformer winding exceeds the maximum withstand temperature of its winding insulation, the transformer winding insulation may be damaged [22][23][24]. This may cause the temperature of the transformer winding to rise rapidly, which seriously affects the safe and stable operation of the transformer.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis and Structure Optimization of a Dry-type Transformer with Ceramic Insulated Windings for Offshore Platform

Wang

et al. 2023

Preprint

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Dry-type transformer is the key hub equipment connecting power generation platform and power consumption platform in marine power system. Partial insulation aging caused by transformer thermal effect is one of the important factors that adversely affect the operation stability. The new ceramic insulation winding prepared by micro-arc oxidation technology has the characteristics of high thermal conductivity and high temperature resistance, and is an ideal product to replace traditional organic insulation materials. Therefore, in this paper, the thermal characteristics and overload capacity of a ceramic insulated aluminum winding dry-type transformer are studied by combining heat flow coupling simulation and experiment. By comparing the temperature field and velocity field characteristics of traditional organic insulated dry-type transformer and ceramic insulated dry-type transformer, the influence of different winding materials on transformer heat dissipation under the same load condition is studied. The hottest spot temperature of ceramic insulated winding dry-type transformer is about 86% of that of traditional organic insulated transformer. The ceramic insulated dry-type transformer has a good overload capacity. Under the premise of meeting the H-class insulation, it can carry 1.4 times the rated load. Finally, the simulation results are compared with the experimental data of the ceramic insulated dry-type transformer. The accuracy of the results was verified.

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Section: Introductionmentioning

confidence: 99%

Thermal Analysis and Structure Optimization of a Dry-type Transformer with Ceramic Insulated Windings for Offshore Platform

Wang

et al. 2023

Preprint

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Temperature Calculation Method of Dry-Type Transformer Based on Fractional Order Thermal Circuit Model

Zhang

Zhong

2022

Lecture Notes in Electrical Engineering

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Design of integrated supervisory control system for 110 kV dry-type transformer

Zhang¹,

Gao²,

Wang³

et al. 2015

2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

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The paper proposes a design scheme of integrated supervisory control system which is suitable for both 110kV drytype transformer and intelligent substation. Some special problems such as how to measure temperature in the high voltage winding is discussed in the paper. Fiber grating sensor is used in the system because of its strong anti-interference ability and accuracy for temperature. The installation method, quantity and trace of fiber are also discussed. The grounded current of core and working current could be monitored through the high precision current transformer. The supervisory and control intelligent electronic device (IED) is used the modular design method based on high-performance ARM processor in order to improve the hardware and software efficiency. It receives the value of winding and core temperature, ambient temperature, grounded current, and analyzes the status of transformer. According to the data the IED could control the cooling fan to reduce the temperature. The IED also can deliver the data to substation control layer using IEC 61850. The comprehensive application server could display the panoramic data such as monitoring and warning data of transformer.

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The Research on Calculation of Temperature Field of Winding in Dry Type Transformer

Cited by 3 publications

References 5 publications

Thermal Analysis and Structure Optimization of a Dry-type Transformer with Ceramic Insulated Windings for Offshore Platform

Thermal Analysis and Structure Optimization of a Dry-type Transformer with Ceramic Insulated Windings for Offshore Platform

Temperature Calculation Method of Dry-Type Transformer Based on Fractional Order Thermal Circuit Model

Design of integrated supervisory control system for 110 kV dry-type transformer

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