Measuring system and measuring method for measuring actuation time of high-voltage circuit breaker of non-load transformer loop

Abstract

The invention belongs to the field of power equipment control technology, and relates to a measuring system and a measuring method for measuring the actuation time of a high-voltage breaker of a non-load transformer loop. The system comprises a high-voltage-side transformer, a low-voltage-side transformer and a single-chip microcomputer module. The control instruction output end of the single-chip microcomputer module is connected with a breaker drive circuit. The signal input end of the single-chip microcomputer module is connected with a disconnection detection circuit and a connection detection circuit. The disconnection detection circuit is connected with the high-voltage-side transformer via a high-voltage signal acquisition terminal. The connection detection circuit is connected with the high-voltage-side transformer and the low-voltage-side transformer respectively via the high-voltage signal acquisition terminal and a low-voltage signal acquisition terminal. According to the technical scheme of the invention, the connection time duration and the disconnection time duration of the high-voltage breaker in the non-load transformer loop in the high-voltage state can be accurately measured.

Description

technical field [0001] The invention belongs to the electric equipment control technology, and relates to a measurement system and a measurement method for the action time of a high-voltage circuit breaker in an unloaded transformer circuit. Background technique [0002] In the power system, when the no-load transformer is just connected to the power supply, the excitation inrush current generated can sometimes reach dozens of times the rated current of the transformer or greater. Running in standby mode caused a lot of no-load loss. The electromotive force generated by the large-value excitation inrush current is likely to cause damage to the equipment, and the product design is forced to improve the safety factor of the equipment, which increases the manufacturing cost of the equipment. The measured execution time is used as the leading time to control the moment when the circuit breaker sends out the command, and the voltage phase of the transformer input and exit moment...

AI Technical Summary

Problems solved by technology

[0007] In the existing detection system, the single-chip microcomputer generally adopts the query or interrupt method when detecting the state change. When the important single-occurrence event variable has fast and accurate measurement requirements, intensive query and multiple judgment methods affect the program execution efficiency and affect the measurement accuracy.

The interrupt method can quickly capture events, but the premise is to ensure the signal quality. The high-power transformer itself and the surrounding electromagnetic environment are complex, and the circuit design does not allow filtering circuits. The simple interrupt method cannot meet the test requirements.

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