A transformer arrangement

Abstract

A transformer arrangement comprising a transformer having a neutral and formed as a symmetrical transformer, in particular a cage transformer and having a reactor coil connected to the neutral of thetransformer is provided. The transformer can be of any type having a neutral such as a Y-n/Y-n, Z-n/Z-n, Y-n/Z-n or a Z-n/Y-n transformer. By providing a transformer having symmetrical phases connected to a reactor coil a transformer arrangement having less weight is obtained. The lower weight is obtained because in comparison to using an E core for the transformer all phases will be symmetrical so that if a ground fault occurs in one of then phases there is no need for any compensatory windings regardless of which phase suffers the ground fault.

Description

technical field [0001] The present invention relates to a transformer device, in particular to a transformer device comprising a transformer to which a reactor is connected for interconnecting the transformer with ground. Background technique [0002] Electricity distribution is the penultimate stage of delivering electricity (before sales) to end users. This process is generally considered to include medium voltage power lines (typically less than 50 kV), power substations and transformers equipped with magnetic poles, and low voltage power lines (generally less than 1 kV). [0003] Reactor windings are often used in transformer installations for power distribution. Reactor windings are used to generate reactive power. Reactor windings are used in many different environments. One application of reactors is as a ground, used to change current in power transmission systems. Reactors can thus be designed and used to limit capacitive currents at ground faults to almost zero...

AI Technical Summary

Problems solved by technology

And because the transformer device is heavy and requires relatively expensive materials, there i

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