Design method of scale model of extra-high voltage converter transformer

Abstract

The invention discloses a design method of a scale model of an extra-high voltage converter transformer. According to the principle of similitude, the structural characteristics of the extra-high voltage converter transformer and the application occasions of the scale model are taken into account, typical physical quantities needing controlling are set according to the research goal, corresponding resemblance constants are set, the resemblance constants are related through a control equation, and finally a total scale formula of the converter transformer is obtained. The scale model is designed according to the total scale formula of the converter transformer, the consistency of the scale model and an original model is verified by simulating and measuring the electromagnetic field distribution of the scale model, and finally the electromagnetic field distribution characteristics of an original large model are predicted through the scale model. By means of the design method of the scale model, the designed scale model can effectively reflect the electric characteristics of the original model, can be used for carrying out experiments and research, lowers experiment cost, shortens the experiment period, and has good economical benefits for researching large equipment like the extra-high voltage converter transformer.

Description

technical field [0001] The invention belongs to the field of ultra-high voltage direct current transmission equipment testing, in particular to a design method for a scaled model of an ultra-voltage converter transformer used for testing. Background technique [0002] The UHV converter transformer is one of the most important equipment in the UHV DC transmission project. In addition to the role of the conventional transformer, it also works with the converter valve to complete the mutual conversion between AC and DC and connect the DC part with the AC system. Insulation isolation. Its stability and reliability play a vital role in the operation of the entire DC system. As the voltage level increases, more in-depth research is needed on the distribution characteristics of the electric field and magnetic field of the converter transformer under different test voltages. [0003] At present, the electromagnetic field distribution of UHV converter transformers is mainly numeric...

AI Technical Summary

Problems solved by technology

Analytical calculation methods were also used in the past, but due to the complex structure of UHV converter transformers, it is difficult to perform accurate calculations

Moreover, due to the high price and high voltage level of the actual transformer, not only the cost of the test equipment is high, the field test is complicated, but also it is difficult to measure and collect data such as the internal voltage and current in the test, and it is difficult to obtain the electric field distribution, etc.

[0004] If research experiments and tests are carried out on UHV converter transformers, the cost is high or even difficult to operate, so it is necessary to conduct experimental research on the design scale model of UHV converter transformers

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