Novel on-load tap voltage regulating switch

Abstract

The invention discloses a novel on-load tap voltage regulating switch. Each phase comprises at least three voltage regulating units, each voltage regulating unit comprises a main on-off branch provided with a vacuum arc extinguishing chamber and a transition branch in parallel connection with the main on-off branch, and the transition branch comprises a transition vacuum arc extinguishing chamber in serial connection with a resistor. Each voltage regulating unit further comprises a set of driving mechanism used for moving in a reciprocating manner to drive the switching-off and switching-on of the vacuum arc extinguishing chambers in the main on-off branch and the transition branch, and a transmission mechanism matched with the driving mechanism. For every time of voltage regulating, the driving mechanisms of the voltage regulating unit on a current gear and the voltage regulating unit on a gear to be switched respectively acts once. According to the invention, maintenance of a transformer in the lifetime is avoided, the applicability rang is wide, the novel on-load tap voltage regulating switch is applicable to both a dry-type transformer and an oil-immersed transformer, and the whole body is more safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of transformer equipment in the electric power industry, and in particular relates to an on-load tap changer used on a transformer. Background technique [0002] In the "Action Plan for Construction and Transformation of Distribution Networks (2015~2020)" issued by the National Energy Administration, the energy saving and consumption reduction, power supply quality, intelligence, and reliability of distribution stations are all required to be greatly improved. It is also increasingly urgent that the transformer has an on-load voltage regulation function. [0003] At present, the existing distribution transformers generally use compound on-load tap changers, which have the following disadvantages: During the process of switching taps, the contacts are prone to arcing, which leads to damage to the contacts and makes the The oil quality is easily deteriorated, and regular power cuts and oil changes are require...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing distribution transformers generally use compound on-load tap changers, which have the following disadvantages: During the process of switching taps, the contacts are prone to arcing, which leads to damage to the contacts and makes the The oil quality is easily deteriorated, and regular power cuts and oil changes are required for maintenance. Continuous gear adjustments will cause the oil temperature to rise, and frequent pressure adjustments are not suitable; moreover, it uses the electric motor to rotate to store energy for the spring energy storage mechanism, and then releases it suddenly after passing the dead point. mode to drive tap contacts to switch voltage gears

This kind of driving mechanism has complex structure, many parts, high failure rate, low reliability, slow action speed of tap changer and long response time

Images