Device and method for measuring dynamic resistance of high-voltage circuit breaker

Abstract

The invention discloses a device for measuring dynamic resistance of a high-voltage circuit breaker. The device is characterized by at least comprising a super capacitor module (5), a super capacitor charging device (10), a current sampler (4) and a voltage sampler (2), wherein the super capacitor module (5) supplies measuring power supplies with different requirements for measuring switch-on resistance (11) and loop resistance (14) of the high-voltage circuit breaker (3); a charging controller (7) and an electronic switch (16) are controlled by a digital processor (1) so as to control charging and discharging of a super capacitor; and an electric signal is acquired and processed quickly by the digital processor (1) so as to quickly obtain a measuring result on site. Measurement of switch-on resistance, loop resistance and switch-on resistance making time of the high-voltage circuit breaker is integrated and the measuring results of three parameters can be obtained through one-step measuring operation.

Description

technical field [0001] The invention relates to a dynamic resistance measurement technology of a high-voltage circuit breaker, in particular to a measuring device and method which integrates the measurement of closing resistance, loop resistance and closing resistance input time of a high-voltage circuit breaker. Background technique [0002] The high-voltage circuit breaker is the main control device in the high-voltage power grid, which is responsible for cutting and connecting lines and various electrical equipment. When the system fails, it can quickly cut off the fault and prevent the accident from expanding. Therefore, the quality of the high-voltage circuit breaker directly affects the safe operation of the system. [0003] When designing a high-voltage circuit breaker, if it is necessary to control the long-term no-load overvoltage, a closing resistor needs to be installed. The connection of the closing resistor can effectively suppress the operating overvoltage and...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the closing resistance and loop resistance measurement of the circuit breaker cannot be completed simultaneously in one measurement process when measuring the resistance of the high voltage circuit breaker, the object of the present invention is to provide a dynamic resistance measuring device and method for the high voltage circuit breaker. It realizes the measurement of closing resistance, loop resistance and closing resistance input time of high-voltage circuit breaker at the same time in one measurement process

Images