Multistage high-low voltage hybrid excitation standard voltage transformer and simulation verification method thereof

Abstract

The invention discloses a multistage high-low voltage hybrid excitation standard voltage transformer and a simulation verification method thereof. The multi-stage high-low voltage hybrid excitation standard voltage transformer comprises a first-stage voltage transformer, a second-stage voltage transformer, a third-stage voltage transformer and an auxiliary voltage transformer. The invention provides a multistage high-low voltage hybrid excitation standard voltage transformer structure suitable for practical engineering. An equivalent circuit is established for the structure, the theoretical measurement accuracy of the transformer is deduced, the theoretical measurement accuracy of the transformer is verified in combination with Simulink and Matlab, and a solid foundation is laid for the design of the actual multi-stage high-low voltage hybrid excitation standard voltage transformer.

Description

technical field [0001] The invention belongs to the fields of electrical engineering, instrument science and technology, and in particular relates to a multi-stage high and low voltage hybrid excitation standard voltage transformer and a simulation verification method thereof. Background technique [0002] Standard voltage transformers are commonly used in the power field to calibrate voltage transformers in experimental environments, and their accuracy is higher than that of on-site measurement voltage transformers and protection voltage transformers. As the voltage level continues to increase, the insulation design of standard voltage transformers is more complicated, making it difficult to effectively improve the accuracy of standard voltage transformers. Experimental simulation technology can continuously verify the feasibility of transformer insulation design in improving accuracy, and can reduce the cost of developing equipment. [0003] At present, standard voltage t...

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Problems solved by technology

Due to the error compensation of the second-stage iron core, the accuracy of the double-stage voltage transformer is higher than that of the single-stage voltage transformer; it can be seen that adding an additional stage to the double-stage voltage transformer for error compensation, through reasonable setting The iro

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