Radial pressure-variable wound core loss test system and test method

Abstract

The present invention discloses a radial pressure-variable wound core transformer loss test system and a test method thereof. The system mainly comprises a voltage regulator, a digital power analyzer, a wound core transformer test platform and a radial pressure applying device. The radial pressure applying device is fixed inside a transformer wound core of the wound core transformer test platform. In this way, the radial pressure applied on the wound core and diversified in direction and magnitude can be simulated based on the four support members of the radial pressure applying device and the four corners of the inner window of the transformer wound core. Therefore, the loss of the wound core can be tested under the effect of the radial pressure different in direction and magnitude, and loss parameters are measured. Furthermore, the core state can be evaluated and the core structure is optimized.

Description

technical field [0001] The invention belongs to the testing field of transformer faults, and more specifically relates to a testing system for core loss testing system of wound core transformer with variable radial pressure. It also relates to the experimental method based on the wound core transformer core loss test system. Background technique [0002] As one of the core equipment in the power system and traction power supply system, the transformer's stability and reliability are related to the normal operation of the entire system. With the introduction of my country's energy-saving and emission-reduction policies, the winding core transformer structure has the advantages of low no-load loss and low noise, and its use in power systems and traction power supply systems is becoming more and more common. [0003] The no-load loss of the transformer core depends largely on the mechanical stress on the core, whether it is the clamping pressure on the core by clamps, structur...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the influence of pressure on the core loss of transformers is mainly limited to the simulation and analysis of the clamping pressure of the core by clamps.

However, for transformers with wound core structure, since the core is wound with silicon steel strips, the mechanical stress of the silicon steel strips and the winding force of the winding type will cause changes in the radial pressure of the wound core. Unsuitable radial pressure It will also increase the additional loss

However, the current research methods and test platforms cannot effectively study the influence of radial pressure on loss changes

Images