Novel impedance-variable energy-saving transformer

Abstract

The invention relates to a novel impedance-variable energy-saving transformer. The novel impedance-variable energy-saving transformer comprises a transformer oil tank (6), wherein the transformer oil tank (6) is internally provided with a transformer iron core and a transformer winding (5). The novel impedance-variable energy-saving transformer is characterized in that the transformer oil tank (6) is internally provided with a shielding plate (3) so that the inner part of the transformer oil tank (6) is separated into a transformer chamber and a current-limiting reactor chamber; the transformer chamber is internally provided with the transformer iron core and the transformer winding (5); the current-limiting reactor chamber is internally provided with a current-limiting reactor (1) and a rapid switch (2); the rapid switch (2) is connected with the current-limiting reactor (1) in parallel; after the rapid switch (2) is connected with the current-limiting reactor (1) in parallel, the rapid switch (2) is connected with a high-voltage winding in the transformer winding (5) in series. With the adoption of the novel impedance-variable energy-saving transformer, the automatic adjustment of impedance can be realized; meanwhile, the loss is reduced and the economic benefits are improved.

Description

technical field [0001] The invention relates to a novel variable impedance energy-saving transformer. Background technique [0002] The transformer is the hub of the grid to transmit electric energy and the main equipment of the grid operation. The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The winding of the power transformer is short-circuited, especially when the load is short-circuited. If the damage is great, it will affect the normal use of the transformer, and even affect the entire power transmission system in severe cases. [0003] In the current transformer structure, in order to avoid the harm caused by the short circuit of the transformer, one of the measures taken is to optimize and improve the fastening structure, but the actual effect of this method is not obvious when the short circuit current is getting larger and larger. That is to take winding reinforcement to improve the transformer's ability to...

AI Technical Summary

Problems solved by technology

Increasing the leakage reactance will increase the volume of the transformer during normal operation and increase the loss, which cannot meet the requirements of energy saving and consumption reduction, and is difficult to use for short-circuit current limitation of transformers in operation

However, the current limiter has the disadvantages of large maintenance and transformation workload and high economic cost.

In addition, high-impedance transformers lead to increased bus voltage fluctuations, resulting in power quality problems

In short, the traditional transformer short-circuit current limiting measures have room for improvement in terms of product energy saving, technical economy, and convenience of maintenance and transformation.

Images