The use of affine arithmetic for thermal state estimation of substation distribution transformers

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering - Tập 23 Số 1 - Trang 237-249 - 2004
LucioIppolito1, AlfredoVaccaro2, DomenicoVillacci2
1Department of Electrical Engineering, University of Salerno, Salerno, Italy
2Department of Engineering, University of Sannio, Benevento, Italy

Tóm tắt

Thermal protection of mineral‐oil‐filled substation distribution transformers is of critical importance in power systems. The failure of such a transformer is a matter of significant concern for electrical utilities, not only for the consequent severe economic losses, but also because the utility response to a customer during outage condition is one of the major factors in determining the overall customer attitude towards the utility. Therefore, it is essential to estimate the thermal state of transformers during load cycling and, in presence of overload conditions, to evaluate the need to reduce the load current or to install another transformer bay. A method of solving the transformer's thermal model, considering explicitly the source of uncertainty affecting its parameters, is required. In this paper, such an activity is developed by an interval‐based approach, which provides the calculation of the inner and outer solution in the hot‐spot temperature or top‐oil temperature estimation process, keeping track of correlation between uncertain quantities.

Từ khóa


Tài liệu tham khảo

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Thông tin xuất bản

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

Tập 23 Số 1

237-249

Thông tin tác giả