Comprehensive compensation system for transformer characteristic test based on svg

Abstract

The invention discloses a transformer characteristic test comprehensive compensation system based on a static var generator (SVG). The transformer characteristic test comprehensive compensation system comprises a voltage adjustable power supply, a switch K1 of the voltage adjustable power supply, the SVG, a linear compensation adjustment device, an intermediate transformer T2 and a high-voltage compensation capacitor device C2. Two ends of the SVG are respectively connected onto a contact a and a contact b of the switch K1 of the voltage adjustable power supply, and the contact a and the contact b of the switch K1 of the voltage adjustable power supply are further respectively connected with the input end of the linear compensation adjustment device and the input end of the intermediate transformer T2. Therefore, the transformer characteristic test comprehensive compensation system enables test voltage to stably pass a capacitive-to-inductive critical point of a tested transformer, reduces waveform distortion of the transformer during no-load tests, and improves measurement accuracy of test results.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a comprehensive compensation system for transformer characteristic tests based on SVG. Background technique [0002] The transformer characteristic test comprehensive compensation system based on SVG (Static Var Generator) is used for on-site no-load characteristics, load characteristics and temperature rise tests of large transformers. [0003] During the no-load test of the transformer, the current undergoes a change process from capacitive to inductive, and becomes inductive current when it is close to the rated voltage. Since then, due to the nonlinearity of the core magnetic flux, the inductive current has increased sharply, but the active loss of the transformer is very small, and the power factor is very low. The working condition of the field test power supply will be very poor, and the required power supply capacity is very large. At the same time, severe waveform distortion...

AI Technical Summary

Problems solved by technology

Since then, due to the non-linearity of the core magnetic flux, the inductive current has increased sharply, but the active loss of the transformer is very small, the power factor is very low, the working condition of the field test power supply will be very poor, and the required power supply capacity is very large.

At the same time, severe waveform distortion will occur in the test current and voltage, which will cause significant deviations in the test results

Images