TRA1 - Power Transformer Design

Design and analysis of core type power transformers.

The program is used for optimized design and analysis of single and three phase power transformers, ranging from distribution transformers up to the largest sizes. Special types, such as rectifier transformers, can also be handled. The cost of the transformer plus losses is minimized, and all the important performance requirements are met automatically. The program can be run both as an optimizing program and as a pure analysis program. The entire program is supplied in Fortran source code. Input is generated automatically for finite element field program FLD12.

Types of three phase connections include wye, delta, auto, zig-zag, polygon and extended delta.

At the present, the program is restricted to the following core types:

Three phase, three wound circular legs.
Single phase, two wound circular legs.

Types of tank and cooling, presently in the program:

Oil immersed, plain tank, external radiators, air cooled.
Oil immersed, plain tank, external tube coolers, air cooled.
Oil immersed, plain tank, external water coolers.
Oil immersed, corrugated tank, self cooled.

Types of windings:

Disk and helical windings with one or more layers.
Regulating windings for fine and coarse regulation.
Sheet windings.
Layer windings for distribution transformers.
Subdivided layer windings for distribution transformers.
Rectifier windings, double disks, wye and delta connected above each other.
Rectifier windings, double disks, wye and inverse wye connected axially interspersed.
Rectifier windings, double disks, single wye or delta connected.
Rectifier sheet windings, wye and inverse wye connected radially interspersed.

The user's manual can be downloaded as a Word-document here.


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